EP3620282B1 - Osb wood-based panel - Google Patents
Osb wood-based panel Download PDFInfo
- Publication number
- EP3620282B1 EP3620282B1 EP19201042.9A EP19201042A EP3620282B1 EP 3620282 B1 EP3620282 B1 EP 3620282B1 EP 19201042 A EP19201042 A EP 19201042A EP 3620282 B1 EP3620282 B1 EP 3620282B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- strands
- osb
- treated
- based panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002023 wood Substances 0.000 title claims description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000012855 volatile organic compound Substances 0.000 claims description 27
- 230000002829 reductive effect Effects 0.000 claims description 20
- 150000001299 aldehydes Chemical class 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 17
- 235000007586 terpenes Nutrition 0.000 claims description 17
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- JARKCYVAAOWBJS-UHFFFAOYSA-N hexanal Chemical compound CCCCCC=O JARKCYVAAOWBJS-UHFFFAOYSA-N 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N pentanal Chemical compound CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 claims description 10
- 150000003505 terpenes Chemical class 0.000 claims description 10
- BQOFWKZOCNGFEC-UHFFFAOYSA-N carene Chemical compound C1C(C)=CCC2C(C)(C)C12 BQOFWKZOCNGFEC-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 5
- 229930006737 car-3-ene Natural products 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000003063 flame retardant Substances 0.000 claims description 4
- 150000007524 organic acids Chemical class 0.000 claims description 4
- 235000005985 organic acids Nutrition 0.000 claims description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 3
- 229930003658 monoterpene Natural products 0.000 claims description 3
- 235000002577 monoterpenes Nutrition 0.000 claims description 3
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 239000007844 bleaching agent Substances 0.000 claims description 2
- 229930007796 carene Natural products 0.000 claims description 2
- 125000005442 diisocyanate group Chemical group 0.000 claims description 2
- 150000002773 monoterpene derivatives Chemical class 0.000 claims description 2
- 229920001228 polyisocyanate Polymers 0.000 claims description 2
- 239000005056 polyisocyanate Substances 0.000 claims description 2
- 239000010875 treated wood Substances 0.000 claims 13
- JXCHMDATRWUOAP-UHFFFAOYSA-N diisocyanatomethylbenzene Chemical compound O=C=NC(N=C=O)C1=CC=CC=C1 JXCHMDATRWUOAP-UHFFFAOYSA-N 0.000 claims 2
- 238000000746 purification Methods 0.000 claims 1
- 239000002516 radical scavenger Substances 0.000 claims 1
- 229930004725 sesquiterpene Natural products 0.000 claims 1
- 150000004354 sesquiterpene derivatives Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 37
- 238000000034 method Methods 0.000 description 36
- 230000008569 process Effects 0.000 description 20
- 238000004026 adhesive bonding Methods 0.000 description 13
- 238000010025 steaming Methods 0.000 description 12
- -1 terpene compounds Chemical class 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 9
- 239000003292 glue Substances 0.000 description 9
- 238000003825 pressing Methods 0.000 description 7
- GRWFGVWFFZKLTI-IUCAKERBSA-N (-)-α-pinene Chemical compound CC1=CC[C@@H]2C(C)(C)[C@H]1C2 GRWFGVWFFZKLTI-IUCAKERBSA-N 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 238000007792 addition Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 206010013786 Dry skin Diseases 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- LVBXEMGDVWVTGY-SREVYHEPSA-N 2-octenal Chemical compound CCCCC\C=C/C=O LVBXEMGDVWVTGY-SREVYHEPSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 229920002488 Hemicellulose Polymers 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
- 241000018646 Pinus brutia Species 0.000 description 3
- 235000011613 Pinus brutia Nutrition 0.000 description 3
- MVNCAPSFBDBCGF-UHFFFAOYSA-N alpha-pinene Natural products CC1=CCC23C1CC2C3(C)C MVNCAPSFBDBCGF-UHFFFAOYSA-N 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- GRWFGVWFFZKLTI-UHFFFAOYSA-N rac-alpha-Pinene Natural products CC1=CCC2C(C)(C)C1C2 GRWFGVWFFZKLTI-UHFFFAOYSA-N 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- LVBXEMGDVWVTGY-UHFFFAOYSA-N trans-2-octenal Natural products CCCCCC=CC=O LVBXEMGDVWVTGY-UHFFFAOYSA-N 0.000 description 3
- WTARULDDTDQWMU-RKDXNWHRSA-N (+)-β-pinene Chemical compound C1[C@H]2C(C)(C)[C@@H]1CCC2=C WTARULDDTDQWMU-RKDXNWHRSA-N 0.000 description 2
- WTARULDDTDQWMU-IUCAKERBSA-N (-)-Nopinene Natural products C1[C@@H]2C(C)(C)[C@H]1CCC2=C WTARULDDTDQWMU-IUCAKERBSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- WTARULDDTDQWMU-UHFFFAOYSA-N Pseudopinene Natural products C1C2C(C)(C)C1CCC2=C WTARULDDTDQWMU-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- XCPQUQHBVVXMRQ-UHFFFAOYSA-N alpha-Fenchene Natural products C1CC2C(=C)CC1C2(C)C XCPQUQHBVVXMRQ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- UAHWPYUMFXYFJY-UHFFFAOYSA-N beta-myrcene Chemical compound CC(C)=CCCC(=C)C=C UAHWPYUMFXYFJY-UHFFFAOYSA-N 0.000 description 2
- 229930006722 beta-pinene Natural products 0.000 description 2
- BWRHOYDPVJPXMF-UHFFFAOYSA-N carane Chemical compound C1C(C)CCC2C(C)(C)C12 BWRHOYDPVJPXMF-UHFFFAOYSA-N 0.000 description 2
- ULDHMXUKGWMISQ-UHFFFAOYSA-N carvone Chemical compound CC(=C)C1CC=C(C)C(=O)C1 ULDHMXUKGWMISQ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- LCWMKIHBLJLORW-UHFFFAOYSA-N gamma-carene Natural products C1CC(=C)CC2C(C)(C)C21 LCWMKIHBLJLORW-UHFFFAOYSA-N 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- XMGQYMWWDOXHJM-UHFFFAOYSA-N limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- NUJGJRNETVAIRJ-UHFFFAOYSA-N octanal Chemical compound CCCCCCCC=O NUJGJRNETVAIRJ-UHFFFAOYSA-N 0.000 description 2
- CFJYNSNXFXLKNS-UHFFFAOYSA-N p-menthane Chemical compound CC(C)C1CCC(C)CC1 CFJYNSNXFXLKNS-UHFFFAOYSA-N 0.000 description 2
- XOKSLPVRUOBDEW-UHFFFAOYSA-N pinane Chemical compound CC1CCC2C(C)(C)C1C2 XOKSLPVRUOBDEW-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- AOSFMYBATFLTAQ-UHFFFAOYSA-N 1-amino-3-(benzimidazol-1-yl)propan-2-ol Chemical compound C1=CC=C2N(CC(O)CN)C=NC2=C1 AOSFMYBATFLTAQ-UHFFFAOYSA-N 0.000 description 1
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 239000005973 Carvone Substances 0.000 description 1
- WTEVQBCEXWBHNA-UHFFFAOYSA-N Citral Natural products CC(C)=CCCC(C)=CC=O WTEVQBCEXWBHNA-UHFFFAOYSA-N 0.000 description 1
- 241000218631 Coniferophyta Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241000218657 Picea Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 125000002015 acyclic group Chemical group 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- VYBREYKSZAROCT-UHFFFAOYSA-N alpha-myrcene Natural products CC(=C)CCCC(=C)C=C VYBREYKSZAROCT-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 1
- 229920001276 ammonium polyphosphate Polymers 0.000 description 1
- 159000000032 aromatic acids Chemical class 0.000 description 1
- 150000003934 aromatic aldehydes Chemical class 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- BEWYHVAWEKZDPP-UHFFFAOYSA-N bornane Chemical compound C1CC2(C)CCC1C2(C)C BEWYHVAWEKZDPP-UHFFFAOYSA-N 0.000 description 1
- 229930006742 bornane Natural products 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 229930006741 carane Natural products 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 229940043350 citral Drugs 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000012084 conversion product Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 150000002016 disaccharides Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- HMJMQKOTEHYCRN-UHFFFAOYSA-N formaldehyde;phenol;1,3,5-triazine-2,4,6-triamine;urea Chemical compound O=C.NC(N)=O.OC1=CC=CC=C1.NC1=NC(N)=NC(N)=N1 HMJMQKOTEHYCRN-UHFFFAOYSA-N 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- WTEVQBCEXWBHNA-JXMROGBWSA-N geranial Chemical compound CC(C)=CCC\C(C)=C\C=O WTEVQBCEXWBHNA-JXMROGBWSA-N 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- VPGHGGRZCMHQCC-UHFFFAOYSA-N hept-1-en-1-one Chemical compound CCCCCC=C=O VPGHGGRZCMHQCC-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 235000001510 limonene Nutrition 0.000 description 1
- 229940087305 limonene Drugs 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229930004008 p-menthane Natural products 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229930006728 pinane Natural products 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000001256 steam distillation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- BHYQWBKCXBXPKM-UHFFFAOYSA-N tris[3-bromo-2,2-bis(bromomethyl)propyl] phosphate Chemical compound BrCC(CBr)(CBr)COP(=O)(OCC(CBr)(CBr)CBr)OCC(CBr)(CBr)CBr BHYQWBKCXBXPKM-UHFFFAOYSA-N 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/003—Pretreatment of moulding material for reducing formaldehyde gas emission
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K1/00—Damping wood
- B27K1/02—Apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/001—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/007—Treating of wood not provided for in groups B27K1/00, B27K3/00 using pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/007—Combined with manufacturing a workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
- B27N3/143—Orienting the particles or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2200/00—Wooden materials to be treated
- B27K2200/10—Articles made of particles or fibres consisting of wood or other lignocellulosic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2200/00—Wooden materials to be treated
- B27K2200/15—Pretreated particles or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/10—Extraction of components naturally occurring in wood, cork, straw, cane or reed
Definitions
- the present invention relates to an OSB wood-based panel according to claim 1.
- Coarse chipboard also known as OSB (oriented strand boards), are wood-based panels made from long chips (strands). OSB panels are increasingly used in timber and prefabricated house construction, as OSB panels are light and still meet the static requirements placed on building panels. OSB panels are used as building panels and as wall or roof paneling or in the floor area.
- the OSB panels are manufactured in a multi-stage process, whereby first the chips or strands from debarked round wood, preferably softwood, are peeled off in the longitudinal direction by rotating knives. In the subsequent drying process, the natural moisture of the beaches is reduced at high temperatures.
- the moisture level of the strands can vary depending on the adhesive used, whereby the moisture should be well below 10% in order to avoid splitting during later pressing. Depending on the adhesive, wetting on rather damp beaches or on dry beaches can be more favorable. In addition, there should be as little moisture as possible in the strands during the pressing process in order to reduce the steam pressure that occurs during the pressing process as much as possible, as this could otherwise burst the raw panel.
- the strands are introduced into a gluing device in which the glue or adhesive is applied to the chips in a finely distributed manner.
- PMDI polymeric diphenylmethane diisocyanate
- MUPF melamine-urea-phenol-formaldehyde
- glues are predominantly used for gluing.
- the glues can also be used mixed in the OSB panels. These glues are used because, as mentioned above, the OSB panels are often used for structural applications. Moisture and moisture-resistant glues must be used there.
- the glued strands are scattered alternately lengthways and transversely to the direction of production in spreading equipment, so that the strands are arranged crosswise in at least three layers (lower cover layer - middle layer - upper cover layer).
- the direction of spread of the lower and upper cover layer is the same, but deviates from the direction of spread of the middle layer.
- the strands used in the top layer and middle layer also differ from one another.
- the strands used in the top layers are flat and the strands used in the middle layer are less flat or even chip-shaped.
- two strands of material are used in the manufacture of the OSB panels: one with flat strands for the later top layers and one with "chips" for the middle layer.
- the strands in the middle layer can be of poor quality, since the flexural strength is essentially generated by the outer layers. This is why fine material that is produced during machining can also be used in the middle layer of OSB panels.
- the percentage distribution between the middle and top layers is at least 70% to 30%. After the strands have been scattered, they are continuously compressed under high pressure and high temperatures of e.g. 200 to 250 ° C.
- OSB panels are enjoying ever greater popularity and diverse uses, for example as a structural element in house construction or as formwork in concrete construction.
- the hygroscopic properties inherent in wood-based materials have a disadvantageous effect in some applications.
- volatile organic compounds also known as VOCs, include volatile organic substances that evaporate easily or are already present as a gas at lower temperatures, such as room temperature.
- the volatile organic compounds are either already present in the wood material and are released from it during processing or they are According to the current state of knowledge, formed by the breakdown of unsaturated fatty acids, which in turn are decomposition products of the wood. Typical conversion products that occur during processing are, for example, pentanal and hexanal, but also octanal, 2-octenal or 1-heptenal. Softwoods in particular, from which OSB boards are mainly made, contain large amounts of resin and fats, which lead to the formation of volatile organic terpene compounds and aldehydes. VOC, like the aldehydes mentioned, can also arise or be released when certain adhesives are used in the manufacture of wood-based materials.
- OSB material panels are particularly critical because this material is mainly used uncoated. This allows the ingredients to evaporate unhindered.
- the OSB panels are often used for cladding / planking large areas, which usually results in a high room load (m 2 OSB / m 3 room air). This also leads to a concentration of certain substances in the room air.
- VOC-catching substances almost always takes place after the drying process of the strands, as this or the temperature exposure in the press was believed to be the triggering reasons for the majority of the emission.
- the VOC scavengers were added in liquid form via the glue system, solids were added at various points in the process (e.g. scattering). This required an additional installation of metering stations to ensure homogeneous distribution.
- EP0695609A2 discloses a multilayer OSB wood-based panel comprising steam-treated, glued wooden strands.
- the disclosure is now based on the technical task of improving the method known per se for producing OSB material panels in order to simply and safely produce OSB material panels with significantly reduced emissions of volatile organic compounds (VOCs). At least the terpene emissions should be reduced. If possible, the manufacturing process should be changed as little as possible and the costs should not rise disproportionately. Furthermore, the solution should contain the greatest possible flexibility. Ultimately, ecological aspects should also be taken into account, i. H. the solution should not generate additional energy consumption or generate additional waste.
- VOCs volatile organic compounds
- Another technical task was to design a system with which a simple treatment of the beaches to reduce the emission of VOCs is made possible. This should be integrated into the production process and not disrupt or make the production of the OSB more expensive. The technical effort for the treatment should not lead to an increase in safety measures or contain a greater risk potential.
- the invention is defined in claim 1.
- the wooden strands are treated with steam in such a way that the steam is at a temperature between 90 ° C and 110 ° C, particularly preferably 100 ° C at a pressure between 0.7 bar and 1.5 bar, particularly preferably at 1 bar (atmospheric pressure) is passed over the wooden beach.
- the steam treatment thus takes place at the temperature-dependent pressure with which the steam is introduced into the treatment device.
- steam treatment at normal pressure temperature of the water vapor introduced of 100 ° C.
- an additional (external) pressure i.e. in addition to the pressure with which water vapor enters the system. This leads to a simplification of the device, since no pressure vessels (such as an autoclave or a pressure chamber) are necessary for the steam treatment.
- the present steam treatment of the wooden beaches is carried out in a separate steam treatment device.
- the steam treatment takes place outside of a chipper (e.g. knife ring hogger or disc hogger) and is therefore not part of the chipping or shredding process of wood for the production of wooden strands. It is also essential that the steam treatment can be carried out before the wooden beach is dried.
- a chipper e.g. knife ring hogger or disc hogger
- the steam treatment of the wooden strands takes place over a period of 5 to 30 minutes, preferably 10 to 20 minutes, particularly preferably 15 minutes, the amount of steam being a maximum of 1 kg of steam / kg of strands (dry air).
- the duration of the steam treatment is primarily determined by the speed of the transport device on which the wooden strands are continuously guided through the steam treatment device.
- the water vapor is collected as condensate after passing through the wooden beach. It is advantageous that the organic compound load of the condensate is relatively low.
- the COD chemical oxygen demand
- the wooden strands used in the present case can have a length between 50 to 200 mm, preferably 70 to 180 mm, particularly preferably 90 to 150 mm; a width between 5 to 50 mm, preferably 10 to 30 mm, particularly preferably 15 to 20 mm; and have a thickness between 0.1 and 2 mm, preferably between 0.3 and 1.5 mm, particularly preferably between 0.4 and 1 mm.
- the wooden strands have a length between 150 and 200 mm, a width between 15 and 20 mm, a thickness between 0.5 and 1 mm and a maximum humidity of 50%.
- the at least one housing can be in the form of a metal tube or tubular body.
- the at least one transport device consists of at least one transport belt.
- the conveyor belt should Have perforations or other openings so that the water vapor can be guided from the top of the conveyor belt past the wooden beach to the underside of the conveyor belt.
- the wooden strands are distributed on the conveyor belt in such a way that a homogeneous flow of water vapor through the wooden strands is possible.
- more than one spray means is provided on the water vapor feed line.
- the number of spray means is particularly dependent on the total length of the housing.
- the spray means can also be controlled individually so that the required amount of water vapor can be set in a targeted manner.
- Nozzles or other suitable injectors can be used as spraying means, which enable an even spraying and an even distribution of the water vapor on and between the wooden beaches.
- the water vapor is collected as condensate after passing through the wooden beach.
- at least one means for collecting the condensate is provided in the steaming system below the conveyor belt (based on the direction of flow of the steam).
- the tubular body can be angled upwards in the direction of advance.
- the condensate collected in this way contains wood constituents washed out of the wooden strands, in particular aldehydes, organic acids and / or terpenes, in particular those which have a certain water solubility.
- the steam-treated strands After leaving the steam treatment device, the steam-treated strands have a temperature of 80 to 90.degree. At this temperature, the wooden strands from the steam treatment station enter a dryer (as part of the OSB production line), which leads to an increase in dryer performance. The energy that is needed to remove wood constituents is then used for the drying process. In a normal process, the entry temperature of the strands into the dryer is approx. 25 ° C.
- the present method enables the production of OSB wood-based panels using steam-treated wooden strands, which are introduced into a known production process in addition or as an alternative to untreated wooden strands.
- An OSB wood-based panel produced with this method, comprising steam-treated wooden strands, has reduced emissions of volatile organic compounds, in particular of terpenes and aldehydes.
- the provision of the present method results in various advantages. This enables simple production of the OSB wood-based panels without significantly influencing the usual process chain with significantly reduced emissions of volatile organic compounds from the OSB.
- the energy requirement for drying the wooden strands can be reduced, since the wooden strands are already at an elevated temperature (e.g. of approx. 90 ° C) when they enter the dryer; i.e. the energy used in the steam treatment supports the drying process.
- the use of additional chemicals can also be dispensed with, which means that the overall process is ecologically and economically advantageous.
- the production of OSB is changed in comparison to the conventional OSB production process in such a way that at least some of the strands used are treated with steam after production and before drying.
- the strands can be those intended for the top or middle class.
- the beaches will be the standard drying performed. This is done e.g. B. immediately before gluing, with a complete substitution or only a partial substitution of the standard strands can take place.
- steam-treated wooden strands or a mixture of steam-treated wooden strands and non-steam-treated wooden strands are used as the middle layer and / or top layer of the OSB wood-based panel.
- only one or both cover layers are formed from steam-treated wooden strands and, if necessary, dried and non-steam-treated wooden strands are used for the middle layer.
- the mixture can comprise between 10 and 50% by weight, preferably between 20 and 30% by weight of untreated or non-steam-treated wooden strands and between 50 and 90% by weight, preferably between 70 and 80% by weight of steam-treated wooden strands.
- the step of steam treatment of the wooden strands can be carried out separately from the manufacturing process for the OSB wood-based panels. Accordingly, in this embodiment variant of the present method, the steam treatment takes place outside of the overall process or the process line.
- the wooden strands are removed from the manufacturing process and transferred to the Steam treatment device (e.g. steaming system) introduced.
- the steam-treated wooden strands can then be reintroduced into the conventional manufacturing process, if necessary after intermediate storage, for example immediately before gluing. This enables a high degree of flexibility in the manufacturing process.
- the steam treatment of the wooden strands can be integrated into the manufacturing process of the OSB wood-based panels in yet another variant, i.e. the steam treatment step is integrated into the overall process or process line and takes place online.
- the steam treatment can i) take place immediately after the chipping and provision of the wooden strands or ii) only after the sifting and separation of the wooden strands in accordance with the use of the wooden strands for the middle or top layer.
- a separate steam treatment of the wooden strands can be carried out according to the requirements for the wooden strands used in the middle and top layers.
- the steam treatment of the wooden strands is carried out in at least one steaming system, preferably in two steaming systems.
- the vapor deposition system used in the present case can be present or function as a batch system or as a continuously operated system, a continuously operated system being preferred.
- the steam treatment of the wooden strands used for the middle layer and the outer layers of the OSB wood-based panel can each be carried out separately in at least two steaming systems.
- This enables the degree of steaming of the steam-treated wooden strands used in the middle and / or top layer to be adapted to the respective requirements and customer requests.
- the two vaporization systems used are preferably connected or arranged in parallel.
- the bringing of the wooden strands into contact with the at least one binding agent in step d) is preferably carried out by spraying or atomizing the binding agent onto the wooden strands.
- Many OSB systems work with rotating coils (drums with atomizer glue). Mixer gluing would also be possible.
- the strands are intimately mixed with the glue in a mixer using rotating blades.
- a polymer adhesive is preferably used as a binder, which is selected from the group containing formaldehyde adhesives, such as urea-formaldehyde resin adhesive (UF) and / or melamine-formaldehyde resin adhesive (MF), polyurethane adhesives , Epoxy resin adhesives, polyester adhesives.
- formaldehyde adhesives such as urea-formaldehyde resin adhesive (UF) and / or melamine-formaldehyde resin adhesive (MF), polyurethane adhesives , Epoxy resin adhesives, polyester adhesives.
- the use of a polyurethane adhesive is preferred, the polyurethane adhesive being based on aromatic polyisocyanates, in particular polydiphenylmethane diisocyanate (PMDI), tolylene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI), with PMDI being particularly preferred.
- PMDI polydiphenylmethane di
- the steam-treated and non-steam-treated wooden strands are glued with an amount of binding agent of 1.0 to 5.0% by weight, preferably 2 to 4% by weight, in particular 3% by weight (based on the total amount of wooden strands).
- the flame retardant can typically be added in an amount between 1 and 20% by weight, preferably between 5 and 15% by weight, particularly preferably 10% by weight, based on the total amount of the wooden strands.
- Typical flame retardants are selected from the group comprising phosphates, sulfates, borates, in particular ammonium polyphosphate, tris (tri-bromoneopentyl) phosphate, zinc borate or boric acid complexes of polyhydric alcohols.
- the glued (steam-treated and / or non-steam-treated) wooden strands are sprinkled on a conveyor belt with the formation of a first cover layer along the transport direction, then with the formation of a middle layer transversely to the transport direction and finally with the formation of a second cover layer along the transport direction.
- the glued wooden strands After being sprinkled on, the glued wooden strands are pressed at temperatures between 200 and 250 ° C., preferably 220 and 230 ° C., to form an OSB wood-based panel.
- the present method enables the production of an OSB wood-based panel with reduced emissions of volatile organic compounds (VOCs), which comprises steam-treated wooden strands.
- VOCs volatile organic compounds
- the present OSB wood-based panel can consist entirely of steam-treated wooden strands or a mixture of steam-treated and non-steam-treated wooden strands.
- both outer layers and the middle layer of the OSB consist of steam-treated wooden strands
- the two outer layers consist of non-steam-treated wooden strands and the middle layer consist of steam-treated wooden strands
- the two outer layers consist of steam-treated wooden strands and the middle layer made of non-steam-treated wooden beaches.
- the present OSB wood-based panel can have a bulk density between 300 and 1000 kg / m 3 , preferably between 500 and 800 kg / m 3 , particularly preferably between 500 and 600 kg / m 3 .
- the thickness of the present OSB wood-based panel can be between 5 and 50 mm, preferably between 10 and 40 mm, a thickness between 15 and 25 mm being particularly preferred.
- the OSB wood-based panel produced with the present method has a reduced emission of aldehydes released during the wood digestion, in particular pentanal or hexanal, and / or terpenes, in particular carene and pinene.
- the release of aldehydes occurs during the machining process and the associated aqueous processing and cleaning of the wooden strands.
- Specific aldehydes can be formed from the basic building blocks of cellulose or hemicellulose.
- the aldehyde furfural is formed from mono- and disaccharides of cellulose or hemicellulose, while aromatic aldehydes can be released from lignin.
- the aliphatic aldehydes saturated and unsaturated are formed by the fragmentation of fatty acids with the participation of oxygen.
- Typical acyclic terpenes are terpene hydrocarbons such as myrcene, terpene alcohols such as gerianol, linaool, ipsinol and terpene aldehydes such as citral.
- Typical representatives of the monocyclic terpenes are p-menthane, terpeninol, limonene or carvone, and typical representatives of the bicyclic terpenes are carane, pinane, bornane, 3-carene and ⁇ -pinene being particularly important.
- Terpenes are components of tree resins and are therefore particularly present in very resinous tree species such as pine or spruce.
- organic acids in particular the emission of acetic acid from OSB wood-based panels, can also be reduced.
- Organic acids occur in particular as cleavage products of the wood components cellulose, hemicellulose and lignin, whereby alkanoic acids such as acetic acid and propionic acid or aromatic acids are preferably formed.
- the vapor deposition system can be designed to be continuous.
- the wooden strands are applied to a tramsport belt, which guides the wooden strands through the steaming system at a specified speed.
- the wooden strands are evenly sprayed with water vapor, which is introduced from nozzles provided above the conveyor belt.
- the steaming system can be provided in front of (upstream) the device for sifting and separating the wooden strands. In this case, all wooden beaches are subjected to steam treatment.
- two steaming systems may be provided behind (downstream) the device for sifting and separating the wooden strands.
- one steam treatment system is used for the steam treatment of the wooden strands that are provided for the middle layer
- the other steam treatment system for the steam treatment of the wooden strands that are provided for the top layers. This enables an optional steam treatment of the wooden strands for the middle layer or the wooden strands for the top layers.
- FIG 1 shows a variant of a device 10 for the steam treatment of wooden strands.
- the device comprises a (thermally insulated) tubular body 11 with a perforated conveyor belt 12 running through the tubular body 11.
- a collecting means 15 for the water vapor condensate that forms is provided below the conveyor belt 12.
- the present device 10 enables the strands to be steamed before the strands are dried in the drum dryer. All or parts of the strands that are intended for the later manufacture of the OSB can be treated. The treatment takes place at normal pressure and, thanks to the use of the metal mesh conveyor belt 12, the strands are treated homogeneously with steam.
- the belt of the transport device is dimensioned so that the strands cannot fall through the gaps.
- the strands are transferred to the conveyor belt 12, which runs through the tubular body 11, immediately after production.
- the strands are distributed on the conveyor belt 12 in such a way that a homogeneous flow of water vapor through the strands is possible. Separation stations positioned at regular intervals ensure the dissolution of existing or forming beach piles.
- the conveyor belt 12 Since the conveyor belt 12 is cooled by the condensate which forms when the strands are heated and has a relatively high mass compared to the strands, the belt must be heated before the strands are scattered. This accelerates the heating of the beaches and thus reduces the duration of the steam treatment.
- the heating can take place by resistance heating or by radiation.
- the steam is then applied to the strands from above through nozzles 14.
- the steam has a temperature of approx. 100 ° C.
- the insulation of the metal tube 11 ensures that the heat losses are as low as possible.
- the condensate that forms is collected under the transport device 12, freed of suspended matter and, after a cleaning step, returned to the system to remove dissolved matter.
- the dwell time of the strands in the saturated steam atmosphere is 5 to 15 minutes.
- the progress of the beach warming is determined by thermal sensors at regular intervals.
- the temperature of the beaches should be close to 90 ° C at the end of the treatment.
- step 1 suitable wood starting material for the production of the wooden strands is initially provided. All conifers, hardwoods or mixtures thereof are suitable as the starting material for wood.
- the debarking (step 2) and the chipping (step 3) of the wood raw material takes place in suitable chippers, whereby the size of the wood strand can be controlled accordingly.
- the wooden strands After the wooden strands have been comminuted and made available, they may be subjected to a pre-drying process, with a moisture content of 5-10% in relation to the initial moisture content of the wooden strands being set (not shown).
- the wooden strands are introduced into a steaming system (step 4).
- the steam treatment of the wooden strands takes place in a temperature range between 80 ° and 120 ° C at a pressure between 0.5 bar and 2 bar.
- the resulting condensate can be collected and the substances washed out of the wooden strands (terpenes, aldehydes) can be used for further use from the condensate.
- the steam-treated wooden strands are dried (step 9), sifted and separated (step 5).
- step 6a There is a separation in wooden strands for use as a middle layer (step 6a) or as a top layer (step 6b) with respective gluing.
- the glued, steam-treated wooden strands are sprinkled on a conveyor belt in the order first lower cover layer, middle layer and second upper cover layer (step 7) and then pressed to form an OSB wood-based panel (step 8).
- the second embodiment shown is the wood starting material in analogy to Figure 1 first provided (step 1), debarked (step 2) and machined (step 3). If necessary, the wooden strands are subjected to a pre-drying process, with a moisture content of 5-10% in relation to the initial moisture content of the wooden strands being set (step 3a).
- a separation in wooden strands for use as a middle layer or as a top layer takes place after the optional drying (step 5).
- step 4a the steam treatment of the wooden strands intended for the middle layer
- step 4b the steam treatment of the wooden strands intended for the top layer (s)
- the steam treatment of the wooden strands takes place in a temperature range between 80 ° and 120 ° C at a pressure between 0.5 bar and 2 bar.
- the resulting condensate can be collected and the substances washed out of the wooden strands (terpenes, aldehydes) can be used from the condensate for further use.
- step 9a, 9b After completion of the steam treatment, which in the present case takes about 10-20 minutes, the steam-treated wooden strands are dried (step 9a, 9b) and glued (steps 6a, b).
- the glued, water-treated wooden strands are sprinkled on a conveyor belt in the sequence first lower cover layer, middle layer and second upper cover layer (step 7) and then pressed to form an OSB wood-based panel (step 8).
- the OSB wood-based panel obtained is made up in a suitable manner.
- Embodiment 1 Strands are produced from pine trunks (length: max. 200 mm, width: 20 mm, thickness: max. 1 mm, humidity max. 50%) and treated with steam at around 100 ° C in a continuous process.
- the strands are loosely piled up on a conveyor belt, which has perforations and thus allows the steam to pass through after passing through the strands.
- the steam treatment was preferably carried out from top to bottom.
- the conveyor belt is guided through a tubular body. Preferably they are above the conveyor belt with the loosely poured strands Nozzles are attached, which distribute the steam evenly over the strands.
- the treatment with steam takes about 15 minutes.The steam treatment takes place with the greatest possible exclusion of oxygen, so that one can speak of a reductive process management.
- the tube body has a diameter of 50 cm and a length of 3 m to achieve a residence time of about 15 minutes.
- the conveyor belt was moved through the pipe body at a speed of about 2 m / 10 minutes. In the feed direction, the pipe body was angled slightly upwards (2 to 10 degrees) so that the condensate that formed could easily be caught. This is a test facility with which the effect should be demonstrated. For a production plant, this can be enlarged and easily optimized by a person skilled in the art in terms of transport speed and quantity.
- the strands are then dried in a conventional drum dryer.
- the energy requirement of the drum dryer is significantly reduced, as the strands already have a temperature of around 90 ° C when they enter the dryer.
- they are glued in a coil with adhesive, preferably with PMDI (approx. 3% by weight on absolutely dry wood).
- the glued stands are scattered in a standard OSB system as a top and middle layer.
- the percentage distribution between the middle and top layers is preferably 70% to 30%.
- the strands are pressed into panels with a gross density of around 570 kg / m3. After a storage time of one week, the test plate was tested for the VOC release together with a standard plate of the same thickness in a microchamber.
- Chamber parameters temperature: 23 ° C; Humidity: 0%; Air flow: 150 ml / min; Air change: 188 / h; Loading: 48.8 m 2 / m 3 ; Sample surface: 0.003 m 2 ; Chamber volume: 48 ml.
- parameter Test plate [ ⁇ g / m2 xh] Standard board [ ⁇ g / m2 xh] Hexanal 194 1474 3-carene 208 626 ⁇ -pinene 181 925 Pentane al - 155 ⁇ -pinene - 285 2-octenal 60 115 Table 1
- the top layer consists of standard strands.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Description
Die vorliegende Erfindung betrifft eine OSB-Holzwerkstoffplatte nach Anspruch 1.The present invention relates to an OSB wood-based panel according to claim 1.
Grobspanplatten, auch OSB (oriented strand boards) genannt, sind Holzwerkstoffplatten, die aus langen Spänen (strands) hergestellt werden. OSB-Platten werden zunehmend im Holz- und Fertighausbau eingesetzt, da OSB-Platten leicht sind und trotzdem die an Bauplatten gesetzten statischen Anforderungen erfüllen. So werden OSB-Platten als Bauplatten und als Wand- oder Dachbeplankung oder auch im Fußbodenbereich eingesetzt.Coarse chipboard, also known as OSB (oriented strand boards), are wood-based panels made from long chips (strands). OSB panels are increasingly used in timber and prefabricated house construction, as OSB panels are light and still meet the static requirements placed on building panels. OSB panels are used as building panels and as wall or roof paneling or in the floor area.
Die Herstellung der OSB-Platten erfolgt in einem mehrstufigen Prozess, wobei zunächst die Späne oder Strands aus entrindetem Rundholz, bevorzugt Nadelhölzer, in Längsrichtung durch rotierende Messer abgeschält werden. Im sich anschließenden Trocknungsvorgang wird die natürliche Feuchtigkeit der Strands bei hohen Temperaturen reduziert. Der Feuchtigkeitsgrad der Strands kann je nach verwendeten Klebstoff variieren, wobei sich die Feuchtigkeit deutlich unter 10% bewegen sollte, um Spalter beim späteren Verpressen zu vermeiden. In Abhängigkeit vom Klebstoff kann eine Benetzung auf eher feuchten Strands oder auf trockenen Strands günstiger sein. Außerdem sollte während des Pressvorganges möglichst wenig Feuchtigkeit in den Strands vorhanden sein, um den während des Pressvorganges entstehenden Dampfdruck weitestgehend zu reduzieren, da dieser die Rohplatte ansonsten zum Platzen bringen könnte.The OSB panels are manufactured in a multi-stage process, whereby first the chips or strands from debarked round wood, preferably softwood, are peeled off in the longitudinal direction by rotating knives. In the subsequent drying process, the natural moisture of the beaches is reduced at high temperatures. The moisture level of the strands can vary depending on the adhesive used, whereby the moisture should be well below 10% in order to avoid splitting during later pressing. Depending on the adhesive, wetting on rather damp beaches or on dry beaches can be more favorable. In addition, there should be as little moisture as possible in the strands during the pressing process in order to reduce the steam pressure that occurs during the pressing process as much as possible, as this could otherwise burst the raw panel.
Im Anschluss an die Trocknung der Strands werden diese in eine Beleimvorrichtung eingeführt, in welcher der Leim bzw. Klebstoff fein verteilt auf die Späne aufgebracht wird. Zur Verleimung werden überwiegend PMDI- (polymeres Diphenylmethandiisocyanat) oder MUPF-Leime (Melamin-Harnstoff-Phenol-Formaldehyd) eingesetzt. Die Leime können in den OSB-Platten auch gemischt eingesetzt werden. Diese Leime werden verwendet, da die OSB-Platten wie oben erwähnt häufig für konstruktive Anwendungen genutzt werden. Dort müssen feuchte- bzw. nässebeständige Leime verwendet werden.Following the drying of the strands, they are introduced into a gluing device in which the glue or adhesive is applied to the chips in a finely distributed manner. PMDI (polymeric diphenylmethane diisocyanate) or MUPF (melamine-urea-phenol-formaldehyde) glues are predominantly used for gluing. The glues can also be used mixed in the OSB panels. These glues are used because, as mentioned above, the OSB panels are often used for structural applications. Moisture and moisture-resistant glues must be used there.
Nach der Beleimung werden die beleimten Strands in Streuapparaturen alternierend längs und quer zur Produktionsrichtung gestreut, so dass die Strands kreuzweise in mindestens drei Schichten angeordnet sind (untere Deckschicht - Mittelschicht - obere Deckschicht). Die Streurichtung von unterer und oberer Deckschicht ist dabei gleich, weichen jedoch von der Streurichtung der Mittelschicht ab. Auch unterscheiden sich die in der Deckschicht und Mittelschicht verwendeten Strands voneinander. So sind die in den Deckschichten verwendeten Strands flächig und die in der Mittelschicht verwendeten Strands weniger flächig bis hin zu spanförmig. Üblicherweise werden bei der Herstellung der OSB-Platten zwei Materialstränge gefahren: einer mit flächigen Strands für die späteren Deckschichten und einer mit "Spänen" für die Mittelschicht. Entsprechend können die Strands in der Mittelschicht qualitativ schlechter sein, da die Biegefestigkeit im Wesentlichen durch die Deckschichten erzeugt wird. Deshalb kann auch Feingut, das beim Zerspanen entsteht, in der Mittelschicht von OSB-Platten verwendet werden. Die prozentuale Verteilung zwischen Mittel- und Deckschicht ist mindestens 70% zu 30%. Im Anschluss an die Streuung der Strands erfolgt ein kontinuierliches Verpressen der selbigen unter hohem Druck und hoher Temperatur von z.B. 200 bis 250°C.After the gluing, the glued strands are scattered alternately lengthways and transversely to the direction of production in spreading equipment, so that the strands are arranged crosswise in at least three layers (lower cover layer - middle layer - upper cover layer). The direction of spread of the lower and upper cover layer is the same, but deviates from the direction of spread of the middle layer. The strands used in the top layer and middle layer also differ from one another. The strands used in the top layers are flat and the strands used in the middle layer are less flat or even chip-shaped. Usually, two strands of material are used in the manufacture of the OSB panels: one with flat strands for the later top layers and one with "chips" for the middle layer. Correspondingly, the strands in the middle layer can be of poor quality, since the flexural strength is essentially generated by the outer layers. This is why fine material that is produced during machining can also be used in the middle layer of OSB panels. The percentage distribution between the middle and top layers is at least 70% to 30%. After the strands have been scattered, they are continuously compressed under high pressure and high temperatures of e.g. 200 to 250 ° C.
OSB-Platten erfreuen sich nicht zuletzt auf Grund ihrer Nachhaltigkeit immer größerer Beliebtheit und vielfältiger Anwendung, beispielsweise als Konstruktionselement beim Hausbau oder als Schalung im Betonbau. Den Holzwerkstoffen innewohnende hygroskopische Eigenschaften wirken sich bei einigen Anwendungen jedoch nachteilig aus.Not least because of their sustainability, OSB panels are enjoying ever greater popularity and diverse uses, for example as a structural element in house construction or as formwork in concrete construction. However, the hygroscopic properties inherent in wood-based materials have a disadvantageous effect in some applications.
Besonders bei einer Verwendung von OSB im Innenbereich wird ein Entweichen von Holzinhaltsstoffen kritisch gesehen. Dies ist insbesondere bei OSB-Platten aus Kiefernholz problematisch, da diese besonders hohe Emission von flüchtigen organischen Verbindungen zeigen.Escape of wood constituents is seen as critical, especially when using OSB indoors. This is particularly problematic in the case of OSB boards made of pine wood, since they show particularly high emissions of volatile organic compounds.
Im Verlaufe der Herstellung von Holzwerkstoffplatten und insbesondere bedingt durch den Herstellungsprozess der Holzstrands entstehen bzw. werden eine Vielzahl von flüchtigen organischen Verbindungen freigesetzt. Zu den flüchtigen organischen Verbindungen, auch VOC's genannt, gehören flüchtige organische Stoffe, die leicht verdampfen bzw. bereits bei niedrigeren Temperaturen, wie zum Beispiel bei Raumtemperatur, als Gas vorliegen.In the course of the manufacture of wood-based panels, and in particular due to the manufacturing process of the wooden strands, a large number of volatile organic compounds arise or are released. The volatile organic compounds, also known as VOCs, include volatile organic substances that evaporate easily or are already present as a gas at lower temperatures, such as room temperature.
Die flüchtigen organischen Verbindungen (VOC) sind entweder bereits im Holzmaterial vorhanden und werden während der Aufarbeitung aus diesem abgegeben oder sie werden nach derzeitigem Erkenntnisstand durch den Abbau von ungesättigten Fettsäuren gebildet, die wiederum Zersetzungsprodukte des Holzes sind. Typische Umwandlungsprodukte, die während der Bearbeitung auftreten, sind zum Beispiel Pentanal und Hexanal, aber auch Octanal, 2-Octenal oder 1-Heptenal. Insbesondere Nadelhölzer, aus denen vorwiegend OSB-Platten hergestellt werden, enthalten große Mengen an Harz und Fetten, die zur Bildung von flüchtigen organischen Terpenverbindungen und Aldehyden führen. VOC, wie die genannnten Aldehyde, können jedoch auch bei der Verwendung bestimmter Klebstoffe für die Herstellung der Holzwerkstoffe entstehen bzw. freigesetzt werden.The volatile organic compounds (VOC) are either already present in the wood material and are released from it during processing or they are According to the current state of knowledge, formed by the breakdown of unsaturated fatty acids, which in turn are decomposition products of the wood. Typical conversion products that occur during processing are, for example, pentanal and hexanal, but also octanal, 2-octenal or 1-heptenal. Softwoods in particular, from which OSB boards are mainly made, contain large amounts of resin and fats, which lead to the formation of volatile organic terpene compounds and aldehydes. VOC, like the aldehydes mentioned, can also arise or be released when certain adhesives are used in the manufacture of wood-based materials.
Die Emission von Inhaltsstoffen bei OSB-Werkstoffplatten ist vor allem deshalb kritisch, weil dieser Werkstoff zum überwiegenden Teil unbeschichtet verwendet wird. Dadurch können die Inhaltsstoffe ungehindert ausdünsten. Außerdem werden die OSB-Platten häufig zur Verkleidung/Beplankung von großen Flächen verwendet, woraus sich meist eine hohe Raumbeladung (m2 OSB / m3 Raumluft) ergibt. Dies führt zusätzlich zu einer Aufkonzentration bestimmter Substanzen in der Raumluft.The emission of ingredients in OSB material panels is particularly critical because this material is mainly used uncoated. This allows the ingredients to evaporate unhindered. In addition, the OSB panels are often used for cladding / planking large areas, which usually results in a high room load (m 2 OSB / m 3 room air). This also leads to a concentration of certain substances in the room air.
Um das Problem der VOC-Emission zu lösen, wurden in der Vergangenheit verschiedene Ansätze beschrieben.Various approaches have been described in the past to solve the problem of VOC emissions.
So wurde in der Vergangenheit versucht zu mindestens die Emissionen der Aldehyde durch den Zusatz von Reduktionsmitteln zu vermindern. Allerdings waren viele dieser Reduktionsmittel schwefelhaltig, was zu unerwünschten Emissionen von Schwefeldioxid während der Plattenproduktion und in der späteren Nutzung führte.In the past, attempts were made to at least reduce the emissions of aldehydes by adding reducing agents. However, many of these reducing agents contained sulfur, which led to undesirable emissions of sulfur dioxide during plate production and later use.
Ein Ansatz wurde in der
Auch der Zusatz von Aktivkohle wurde erprobt, ist aber technologisch und unter Kostenaspekten nicht zufriedenstellend.The addition of activated charcoal has also been tested, but is not satisfactory in terms of technology and costs.
Die Zugabe von geeigneten VOC-Fängern Stoffen erfolgt fast immer nach dem Trocknungsprozess der Strands, da man diesen bzw. auch die Temperaturbeaufschlagung in der Presse für die auslösenden Gründe des überwiegenden Teils der Emission hielt. Die Zugabe der VOC-Fänger erfolgte in flüssiger Form über das Beleimsystem, Feststoffe wurden an verschiedenen Stellen des Prozesses (z. B. Streuung) zugegeben. Dies erforderte eine zusätzliche Installation von Dosierstationen, die eine homogene Verteilung sicherstellen sollten.The addition of suitable VOC-catching substances almost always takes place after the drying process of the strands, as this or the temperature exposure in the press was believed to be the triggering reasons for the majority of the emission. The VOC scavengers were added in liquid form via the glue system, solids were added at various points in the process (e.g. scattering). This required an additional installation of metering stations to ensure homogeneous distribution.
Der Offenbarung liegt nunmehr die technische Aufgabe zu Grunde, das an sich bekannte Verfahren zur Herstellung von OSB-Werkstoffplatten dahingehend zu verbessern, um einfach und sicher OSB-Werkstoffplatten mit einer deutlich verringerten Emission von flüchtigen organischen Verbindungen (VOCs) herzustellen. Dabei sollte wenigstens die Emission der Terpene reduziert werden. Wenn möglich, sollte der Herstellprozess so wenig wie möglich verändert werden und die Kosten nicht unverhältnismäßig steigen. Weiterhin sollte die Lösung eine möglichst große Flexibilität beinhalten. Letztlich sollen auch ökologische Aspekte mit in Betracht gezogen werden, d. h. die Lösung sollte keine zusätzlichen Energieverbräuche hervorrufen oder zusätzliche Abfälle erzeugen.The disclosure is now based on the technical task of improving the method known per se for producing OSB material panels in order to simply and safely produce OSB material panels with significantly reduced emissions of volatile organic compounds (VOCs). At least the terpene emissions should be reduced. If possible, the manufacturing process should be changed as little as possible and the costs should not rise disproportionately. Furthermore, the solution should contain the greatest possible flexibility. Ultimately, ecological aspects should also be taken into account, i. H. the solution should not generate additional energy consumption or generate additional waste.
Eine weitere technische Aufgabe war es eine Anlage zu konzipieren mit der eine einfache Behandlung der Strands zur Reduzierung der Emission von VOC's ermöglicht wird. Diese sollte in den Produktionsablauf integriert sein und die Herstellung der OSB nicht stören oder verteuern. Auch der technische Aufwand für die Behandlung sollte nicht zu einer Erhöhung von Sicherheitsmaßnahmen führen oder ein größeres Gefährdungspotential beinhalten.Another technical task was to design a system with which a simple treatment of the beaches to reduce the emission of VOCs is made possible. This should be integrated into the production process and not disrupt or make the production of the OSB more expensive. The technical effort for the treatment should not lead to an increase in safety measures or contain a greater risk potential.
Die Erfindung ist im Anspruch 1 definiert.The invention is defined in claim 1.
Es wird ein Verfahren zur Behandlung von zur Herstellung von OSB-Platten geeigneten Holzstrands, insbesondere mit dem Ziel der Reduzierung der VOC-Emission aus diesen Holzstrands, bereitgestellt, wobei die Holzstrands nach ihrer Gewinnung aus geeigneten Hölzern ohne Trocknung mit Wasserdampf behandelt werden, wobei der Wasserdampf mit einer Temperatur zwischen 80°C und 120°C und einem Druck zwischen 0,5 bar und 2 bar über die Holzstrands geleitet wird.A method is provided for treating wooden strands suitable for the production of OSB panels, in particular with the aim of reducing VOC emissions from these wooden strands, the wooden strands being treated with steam after being extracted from suitable woods without drying, the Water vapor with a temperature between 80 ° C and 120 ° C and a pressure between 0.5 bar and 2 bar is passed over the wooden beach.
In einer Ausführungsform des vorliegenden Verfahrens erfolgt die Behandlung der Holzstrands mit Wasserdampf derart, dass der Wasserdampf mit einer Temperatur zwischen 90°C und 110°C, insbesondere bevorzugt von 100°C bei einem Druck zwischen 0,7 bar und 1,5 bar, insbesondere bevorzugt bei 1 bar (Atmosphärendruck) über die Holzstrands geleitet wird. Somit erfolgt die Wasserdampfbehandlung bei dem temperaturabhängigen Druck, mit welchem der Wasserdampf in die Behandlungsvorrichtung eingeleitet wird. Insbesondere eine Wasserdampfbehandlung bei Normaldruck (Temperatur des eingeleiteten Wasserdampfes von 100°C) ist bevorzugt. Entsprechend kann auf das Anlegen eines zusätzlichen (äußeren) Druckes (d.h. zusätzlich zum Druck mit der Wasserdampf in die Anlage gelangt) verzichtet werden. Dies führt zu einer Vereinfachung der Vorrichtung, da keine Druckbehälter (wie z.B. ein Autoklav oder eine Druckkammer) für die Wasserdampfbehandlung notwendig sind.In one embodiment of the present process, the wooden strands are treated with steam in such a way that the steam is at a temperature between 90 ° C and 110 ° C, particularly preferably 100 ° C at a pressure between 0.7 bar and 1.5 bar, particularly preferably at 1 bar (atmospheric pressure) is passed over the wooden beach. The steam treatment thus takes place at the temperature-dependent pressure with which the steam is introduced into the treatment device. In particular, steam treatment at normal pressure (temperature of the water vapor introduced of 100 ° C.) is preferred. Accordingly, there is no need to apply an additional (external) pressure (i.e. in addition to the pressure with which water vapor enters the system). This leads to a simplification of the device, since no pressure vessels (such as an autoclave or a pressure chamber) are necessary for the steam treatment.
Aufgrund der angewendeten gesättigten Wasserdampfatmosphäre erfolgt die Wasserdampfbehandlung der Holzstrands in sauerstoffarmer Atmosphäre bzw. unter weitest gehendem Sauerstoffausschluss.Due to the saturated steam atmosphere used, the steam treatment of the wooden beaches takes place in an oxygen-poor atmosphere or with the greatest possible exclusion of oxygen.
Die vorliegende Wasserdampfbehandlung der Holzstrands wird in einer separaten Wasserdampfbehandlungsvorrichtung durchgeführt. Die Wasserdampfbehandlung erfolgt außerhalb eines Zerspaners (z.B. Messerring-Zerspaner oder Scheibenzerspaner) und ist somit nicht Teil des Zerspanungs- oder Zerkleinerungsprozesses von Hölzern zur Herstellung von Holzstrands. Wesentlich ist auch, dass die Wasserdampfbehandlung noch vor der Trocknung der Holzstrands vorgenommen werden kann.The present steam treatment of the wooden beaches is carried out in a separate steam treatment device. The steam treatment takes place outside of a chipper (e.g. knife ring hogger or disc hogger) and is therefore not part of the chipping or shredding process of wood for the production of wooden strands. It is also essential that the steam treatment can be carried out before the wooden beach is dried.
Auch werden dem Wasserdampf keine Additive zugegeben: Insbesondere erfolgt kein Zusatz von Bleichmitteln, wie Bisulfite oder sauerstofffreisetzenden Substanzen. Aber auch auf die Zugabe von anderen VOC-Fängern zum Bindemittel kann verzichtet werden.No additives are added to the steam either: in particular, there is no addition of bleaching agents such as bisulfites or oxygen-releasing substances. But there is also no need to add other VOC scavengers to the binding agent.
In einer Ausführungsform des vorliegenden Verfahrens erfolgt die Wasserdampfbehandlung der Holzstrands über einen Zeitraum von 5 bis 30 min, bevorzugt von 10 bis 20 min, insbesondere bevorzugt von 15 min. Die Menge an Dampf beträgt dabei maximal 1 kg Dampf / kg Strands (atro).In one embodiment of the present process, the steam treatment of the wooden strands takes place over a period of 5 to 30 minutes, preferably 10 to 20 minutes, particularly preferably 15 minutes, the amount of steam being a maximum of 1 kg of steam / kg of strands (dry air).
Die Dauer der Wasserdampfbehandlung wird in erster Linie durch die Geschwindigkeit der Transportvorrichtung bestimmt, auf welcher die Holzstrands durch die Wasserdampfbehandlungsvorrichtung in kontinuierlicher Weise geführt werden.The duration of the steam treatment is primarily determined by the speed of the transport device on which the wooden strands are continuously guided through the steam treatment device.
In einer besonders bevorzugten Ausführungsform wird der Wasserdampf nach Passieren der Holzstrands als Kondensat aufgefangen. Vorteilhaft ist, dass die Belastung des Kondensats mit organischen Verbindungen relativ niedrig ist. Der CSB ( Chemischer Sauerstoffbedarf ) lag bei Behandlung von einem Kilogramm Stands mit einem Kilogramm Dampf bei ca. 250 mg CSB/I.In a particularly preferred embodiment, the water vapor is collected as condensate after passing through the wooden beach. It is advantageous that the organic compound load of the condensate is relatively low. The COD (chemical oxygen demand) was approx. 250 mg COD / I when treating one kilogram of stand with one kilogram of steam.
Die vorliegend verwendeten Holzstrands können eine Länge zwischen 50 bis 200 mm, bevorzugt 70 bis 180 mm, insbesondere bevorzugt 90 bis 150 mm; eine Breite zwischen 5 bis 50 mm, bevorzugt 10 bis 30 mm, insbesondere bevorzugt 15 bis 20 mm; und eine Dicke zwischen 0,1 und 2 mm, bevorzugt zwischen 0,3 und 1,5 mm, insbesondere bevorzugt zwischen 0,4 und 1 mm aufweisen.The wooden strands used in the present case can have a length between 50 to 200 mm, preferably 70 to 180 mm, particularly preferably 90 to 150 mm; a width between 5 to 50 mm, preferably 10 to 30 mm, particularly preferably 15 to 20 mm; and have a thickness between 0.1 and 2 mm, preferably between 0.3 and 1.5 mm, particularly preferably between 0.4 and 1 mm.
In einer Ausführungsform weisen die Holzstrands z.B. eine Länge zwischen 150 und 200 mm, eine Breite zwischen 15 und 20 mm, eine Dicke zwischen 0,5 und 1 mm und eine Feuchte von max. 50% auf.In one embodiment, the wooden strands have a length between 150 and 200 mm, a width between 15 and 20 mm, a thickness between 0.5 and 1 mm and a maximum humidity of 50%.
Die Wasserdampfbehandlung der Holzstrands wird in einer Vorrichtung durchgeführt, die folgende Elemente bzw. Merkmale umfasst:
- mindestens ein Gehäuse, insbesondere ein rohrförmiges Gehäuse;
- mindestens eine das Gehäuse durchlaufende Transportvorrichtung zum Transportieren der Holzstrands durch das Gehäuse; und
- mindestens eine oberhalb der Transportvorrichtung Gehäuse vorgesehene Zuleitung für den Wasserdampf, wobei entlang der Zuleitung mindestens ein Sprühmittel zum Applizieren des Wasserdampfs auf die sich auf der Transportvorrichtung befindlichen Holzstrands angeordnet ist.
- at least one housing, in particular a tubular housing;
- at least one transport device passing through the housing for transporting the wooden strands through the housing; and
- at least one supply line for the water vapor provided above the transport device housing, at least one spray means for applying the water vapor to the wooden beach on the transport device being arranged along the supply line.
In einer Variante kann das mindestens eine Gehäuse in Form eines Metallrohres oder Rohrkörpers vorliegen.In one variant, the at least one housing can be in the form of a metal tube or tubular body.
In einer Ausführungsform der vorliegenden Vorrichtung besteht die mindestens eine Transportvorrichtung aus mindestens einem Transportband. Das Transportband sollte Perforationen oder andere Öffnungen aufweisen, so dass der Wasserdampf von der Oberseite des Transportbandes vorbei an den Holzstrands zur Unterseite des Transportbandes geführt werden kann. Die Holzstrands sind auf dem Transportband so verteilt, dass eine homogene Durchströmung der Holzstrands mit Wasserdampf möglich ist.In one embodiment of the present device, the at least one transport device consists of at least one transport belt. The conveyor belt should Have perforations or other openings so that the water vapor can be guided from the top of the conveyor belt past the wooden beach to the underside of the conveyor belt. The wooden strands are distributed on the conveyor belt in such a way that a homogeneous flow of water vapor through the wooden strands is possible.
In einer weiteren Ausführungsform der vorliegenden Vorrichtung ist mehr als ein Sprühmittel an der Wasserdampfzuleitung vorgesehen. Die Anzahl der Sprühmittel ist dabei insbesondere abhängig von der Gesamtlänge des Gehäuses. Auch können die Sprühmittel einzeln angesteuert werden, so dass die benötiget Wasserdampfmenge gezielt einstellbar ist. Als Sprühmittel können Düsen oder andere geeignete Injektoren verwendet werden, die ein gleichmäßiges Besprühen und eine gleichmäßige Verteilung des Wasserdampfes auf und zwischen der Holzstrands ermöglichen.In a further embodiment of the present device, more than one spray means is provided on the water vapor feed line. The number of spray means is particularly dependent on the total length of the housing. The spray means can also be controlled individually so that the required amount of water vapor can be set in a targeted manner. Nozzles or other suitable injectors can be used as spraying means, which enable an even spraying and an even distribution of the water vapor on and between the wooden beaches.
Wie oben bereits erwähnt, wird in einer besonders bevorzugten Ausführungsform der Wasserdampf nach Passieren der Holzstrands als Kondensat aufgefangen. Hierfür ist in der Bedampfungsanlage unterhalb des Transportbandes (bezogen auf die Strömungsrichtung des Wasserdampfes) mindestens ein Mittel zum Auffangen des Kondensates vorgesehen. Zum Beispiel kann der Rohrkörper nach oben in Vorschubrichtung gewinkelt sein.As already mentioned above, in a particularly preferred embodiment, the water vapor is collected as condensate after passing through the wooden beach. For this purpose, at least one means for collecting the condensate is provided in the steaming system below the conveyor belt (based on the direction of flow of the steam). For example, the tubular body can be angled upwards in the direction of advance.
Das so aufgefangene Kondensat enthält aus den Holzstrands ausgewaschene Holzinhaltsstoffe, insbesondere Aldehyde, organische Säuren und/oder Terpene, insbesondere solche die eine gewisse Wasserlöslichkeit aufweisen.The condensate collected in this way contains wood constituents washed out of the wooden strands, in particular aldehydes, organic acids and / or terpenes, in particular those which have a certain water solubility.
Nach Verlassen der Wasserdampfbehandlungsvorrichtung weisen die dampfbehandelten Strands eine Temperatur von 80 bis 90 °C auf. Mit dieser Temperatur treten die Holzstrands aus der Dampfbehandlungsstation in einen Trockner (als Teil der Produktionslinie für OSB-Platten ein), was zu einer Steigerung der Trocknerleistung führt. Damit wird die Energie, die zur Entfernung von Holzinhaltstoffen gebraucht wird, dann weiter für den Trocknungsprozess genutzt. In einem normalen Prozess liegt die Eintrittstemperatur der Strands in den Trockner bei ca. 25°C.After leaving the steam treatment device, the steam-treated strands have a temperature of 80 to 90.degree. At this temperature, the wooden strands from the steam treatment station enter a dryer (as part of the OSB production line), which leads to an increase in dryer performance. The energy that is needed to remove wood constituents is then used for the drying process. In a normal process, the entry temperature of the strands into the dryer is approx. 25 ° C.
Auch wird ein Verfahren zur Herstellung von OSB-Holzwerkstoffplatten mit reduzierter Emission an flüchtigen organischen Verbindungen (VOCs) bereitgestellt, welches die folgenden Schritte umfasst:
- a) Herstellen von Holzstrands aus geeigneten Hölzern;
- b) Behandeln von zumindest einem Teil der Holzstrands mit Wasserdampf gemäß dem oben beschriebenen Verfahren;
- c) Trocknen der mit dem Wasserdampf behandelten Holzstrands;
- d) Beleimen der mit Wasserdampf behandelten und getrockneten Holzstrands und optional Beleimen von nicht mit Wasserdampf behandelten Holzstrands mit mindestens einem Bindemittel;
- e) Aufstreuen der beleimten Holzstrands auf ein Transportband; und
- f) Verpressen der beleimten Holzstrands zu einer OSB-Holzwerkstoffplatte.
- a) Making wooden strands from suitable woods;
- b) treating at least a part of the wooden strands with water vapor according to the method described above;
- c) drying the wooden strands treated with the steam;
- d) glueing of the steam-treated and dried wooden strands and optionally glueing of wooden strands not treated with steam with at least one binding agent;
- e) scattering the glued wooden strands on a conveyor belt; and
- f) pressing the glued wooden strands to form an OSB wood-based panel.
Das vorliegende Verfahren ermöglicht die Herstellung von OSB-Holzwerkstoffplatten unter Verwendung von wasserdampfbehandelten Holzstrands, die zusätzlich oder alternativ zu unbehandelten Holzstrands in einen bekannten Herstellungsprozess eingeführt werden. Eine mit diesem Verfahren hergestellte OSB-Holzwerkstoffplatte umfassend wasserdampfbehandelte Holzstrands weist eine verminderte Emission von flüchtigen organischen Verbindungen, insbesondere von Terpenen und Aldehyden auf.The present method enables the production of OSB wood-based panels using steam-treated wooden strands, which are introduced into a known production process in addition or as an alternative to untreated wooden strands. An OSB wood-based panel produced with this method, comprising steam-treated wooden strands, has reduced emissions of volatile organic compounds, in particular of terpenes and aldehydes.
Durch die Bereitstellung des vorliegenden Verfahrens ergeben sich verschiedene Vorteile. So ist eine einfache Herstellung der OSB-Holzwerkstoffplatten ohne wesentliche Beeinflussung der üblichen Prozesskette bei deutlich verminderter Emission flüchtiger organischer Verbindungen aus dem OSB möglich. Zusätzlich kann der Energiebedarf zum Trocknen der Holzstrands reduziert werden, da die Holzstrands beim Eintritt in den Trockner bereits eine erhöhte Temperatur (z.B. von ca. 90°C) aufweisen; d.h. der bei der Wasserdampfbehandlung erfolgte Energieeinsatz unterstützt den Trocknungsprozess. Auch ist kann auf den Einsatz von zusätzlichen Chemikalien verzichtet werden, wodurch der Gesamtprozess ökologisch und ökonomisch vorteilhaft ist.The provision of the present method results in various advantages. This enables simple production of the OSB wood-based panels without significantly influencing the usual process chain with significantly reduced emissions of volatile organic compounds from the OSB. In addition, the energy requirement for drying the wooden strands can be reduced, since the wooden strands are already at an elevated temperature (e.g. of approx. 90 ° C) when they enter the dryer; i.e. the energy used in the steam treatment supports the drying process. The use of additional chemicals can also be dispensed with, which means that the overall process is ecologically and economically advantageous.
Die Herstellung von OSB wird bei dem vorliegenden Prozess im Vergleich zu den konventionellen OSB-Herstellungsverfahren dahingehend verändert, dass zumindest ein Teil der verwendeten Strands nach der Herstellung noch vor der Trocknung mit Wasserdampf behandelt werden. Bei den Strands kann es sich um diejenigen handeln, die für die Deck- oder Mittelschicht vorgesehen handeln. Nach der Behandlung werden die Strands der standardmäßig durchgeführten Trocknung zugeführt. Dies erfolgt z. B. unmittelbar vor der Beleimung, wobei eine vollständige Substitution oder auch nur eine teilweise Substitution der Standardstrands erfolgen kann.In the present process, the production of OSB is changed in comparison to the conventional OSB production process in such a way that at least some of the strands used are treated with steam after production and before drying. The strands can be those intended for the top or middle class. After the treatment, the beaches will be the standard drying performed. This is done e.g. B. immediately before gluing, with a complete substitution or only a partial substitution of the standard strands can take place.
In einer weiteren Ausführungsform des vorliegenden Verfahrens werden wasserdampfbehandelte Holzstrands oder eine Mischung aus wasserdampfbehandelten Holzstrands und nicht-wasserdampfbehandelten Holzstrands als Mittelschicht und/oder Deckschicht der OSB-Holzwerkstoffplatte verwendet.In a further embodiment of the present method, steam-treated wooden strands or a mixture of steam-treated wooden strands and non-steam-treated wooden strands are used as the middle layer and / or top layer of the OSB wood-based panel.
Demnach ist in einer Variante eine vollständige Substitution der Holzstrands möglich, wobei die wasserdampfbehandelten Holzstrands in der Mittelschicht, und in einer oder beiden Deckschichten oder auch in sämtlichen Schichten verwendet werden.Accordingly, in one variant, a complete substitution of the wooden strands is possible, with the steam-treated wooden strands being used in the middle layer and in one or both outer layers or in all layers.
In einer anderen Variante ist es möglich, lediglich die Mittelschicht aus wasserdampfbehandelten Holzstrands zu bilden und für eine oder beide Deckschichten nicht-wasserdampfbehandelte Holzstrands zu verwenden. Da wasserdampfbehandelte Holzstrands eine hellere Farbe haben, kann es entsprechend vorteilhaft sein, in der Deckschicht wasserdampfbehandelte Holzstrands einzusetzen. Diese geben der OSB somit eine ansprechendere Farbe.In another variant, it is possible to form only the middle layer from steam-treated wooden strands and to use non-steam-treated wooden strands for one or both cover layers. Since steam-treated wooden strands are lighter in color, it can be advantageous to use steam-treated wooden strands in the top layer. These give the OSB a more appealing color.
In einer noch weiteren Variante werden lediglich eine oder beide Deckschichten aus wasserdampfbehandelten Holzstrands gebildet und für die Mittelschicht werden ggf. getrocknete und nicht-wasserdampfbehandelte Holzstrands verwendet.In yet another variant, only one or both cover layers are formed from steam-treated wooden strands and, if necessary, dried and non-steam-treated wooden strands are used for the middle layer.
In einer noch weiteren Variante ist es denkbar und möglich, für die Mittel- und Deckschichten jeweils ein Gemisch mit beliebigen Verhältnis von wasserdampfbehandelten Holzstrands und nicht-wasserdampfbehandelten Holzstrands zu verwenden. In solche einem Fall kann das Gemisch zwischen 10 und 50 Gew%, bevorzugt zwischen 20 und 30 Gew% an unbehandelten bzw. nicht- wasserdampfbehandelten Holzstrands und zwischen 50 und 90 Gew%, bevorzugt zwischen 70 und 80 Gew% an wasserdampfbehandelten Holzstrands umfassen.In yet another variant, it is conceivable and possible to use a mixture with any desired ratio of steam-treated wooden strands and non-steam-treated wooden strands for the middle and top layers. In such a case, the mixture can comprise between 10 and 50% by weight, preferably between 20 and 30% by weight of untreated or non-steam-treated wooden strands and between 50 and 90% by weight, preferably between 70 and 80% by weight of steam-treated wooden strands.
In einer weiteren Ausführungsvariante kann der Schritt der Wasserdampfbehandlung der Holzstrands separat von dem Herstellungsprozess der OSB-Holzwerkstoffplatten durchgeführt werden. Demnach erfolgt die Wasserdampfbehandlung in dieser Ausführungsvariante des vorliegenden Verfahrens außerhalb des Gesamtprozesses bzw. der Prozesslinie. Die Holzstrands werden hierbei aus dem Herstellungsprozess ausgeschleust und in die Wasserdampfbehandlungsvorrichtung (z.B. Bedampfungsanlage) eingeführt. Anschließend können die wasserdampfbehandelten Holzstrands ggf. nach einer Zwischenlagerung z.B. unmittelbar vor der Beleimung wieder in den herkömmlichen Herstellungsprozess eingeschleust werden. Dies ermöglicht eine hohe Flexibilität im Herstellungsverfahren.In a further embodiment variant, the step of steam treatment of the wooden strands can be carried out separately from the manufacturing process for the OSB wood-based panels. Accordingly, in this embodiment variant of the present method, the steam treatment takes place outside of the overall process or the process line. The wooden strands are removed from the manufacturing process and transferred to the Steam treatment device (e.g. steaming system) introduced. The steam-treated wooden strands can then be reintroduced into the conventional manufacturing process, if necessary after intermediate storage, for example immediately before gluing. This enables a high degree of flexibility in the manufacturing process.
Die Wasserdampfbehandlung der Holzstrands kann in einer noch weiteren Ausführungsvariante in den Herstellungsprozess der OSB-Holzwerkstoffplatten integriert sein, d.h. der Schritt der Wasserdampfbehandlung ist in den Gesamtprozess bzw. Prozesslinie eingegliedert und erfolgt online.The steam treatment of the wooden strands can be integrated into the manufacturing process of the OSB wood-based panels in yet another variant, i.e. the steam treatment step is integrated into the overall process or process line and takes place online.
In diesem Falle kann die Wasserdampfbehandlung i) unmittelbar nach der Zerspanung und Bereitstellung der Holzstrands erfolgen oder ii) erst nach dem Sichten und Separieren der Holzstrands entsprechend der Verwendung der Holzstrands für Mittel- oder Deckschicht. Im letzteren Fall kann eine separate Wasserdampfbehandlung der Holzstrands entsprechend den Erfordernissen für die in Mittel- und Deckschicht verwendeten Holzstrands erfolgen.In this case, the steam treatment can i) take place immediately after the chipping and provision of the wooden strands or ii) only after the sifting and separation of the wooden strands in accordance with the use of the wooden strands for the middle or top layer. In the latter case, a separate steam treatment of the wooden strands can be carried out according to the requirements for the wooden strands used in the middle and top layers.
In einer weitergehenden Variante des vorliegenden Verfahrens wird die Wasserdampfbehandlung der Holzstrands in mindestens einer Bedampfungsanlage, bevorzugt in zwei Bedampfungsanlagen durchgeführt. Die vorliegend zum Einsatz kommende Bedampfungsanlage kann als Batch-Anlage oder als kontinuierlich betriebene Anlage vorliegen bzw. funktionieren, wobei eine kontinuierlich betriebene Anlage bevorzugt ist.In a further variant of the present method, the steam treatment of the wooden strands is carried out in at least one steaming system, preferably in two steaming systems. The vapor deposition system used in the present case can be present or function as a batch system or as a continuously operated system, a continuously operated system being preferred.
Wie bereits oben angemerkt, kann die Wasserdampfbehandlung von für die Mittelschicht und die Deckschichten der OSB-Holzwerkstoffplatte verwendeten Holzstrands jeweils separat in mindestens zwei Bedampfungsanlagen durchgeführt wird. Dies ermöglicht eine Anpassung des Grades der Wasserbedampfung der in der Mittel- und/oder Deckschicht verwendeten wasserdampfbehandelten Holzstrands an die jeweiligen Erfordernisse und Kundenwünsche. Die zwei verwendeten Bedampfungsanlagen sind in diesem Fall bevorzugt parallel geschaltet bzw. angeordnet.As already noted above, the steam treatment of the wooden strands used for the middle layer and the outer layers of the OSB wood-based panel can each be carried out separately in at least two steaming systems. This enables the degree of steaming of the steam-treated wooden strands used in the middle and / or top layer to be adapted to the respective requirements and customer requests. In this case, the two vaporization systems used are preferably connected or arranged in parallel.
Das In-Kontaktbringen der Holzstrands mit dem mindestens einen Bindemittel in Schritt d) erfolgt bevorzugt durch Aufsprühen bzw. Verdüsen des Bindemittels auf die Holzstrands. So arbeiten viele OSB-Anlagen mit rotierenden Coils (Trommeln mit Atomizer-Beleimung). Eine Mischerbeleimung wäre auch möglich. Dabei werden die Strands in einem Mischer durch sich drehende Schaufeln innig mit dem Leim vermischt.The bringing of the wooden strands into contact with the at least one binding agent in step d) is preferably carried out by spraying or atomizing the binding agent onto the wooden strands. Many OSB systems work with rotating coils (drums with atomizer glue). Mixer gluing would also be possible. The strands are intimately mixed with the glue in a mixer using rotating blades.
In einer Ausführungsform des vorliegenden Verfahrens wird bevorzugt ein Polymerklebstoff als Bindemittel verwendet, der ausgewählt ist aus der Gruppe enthaltend Formaldehyd-Klebstoffe, wie Harnstoff-Formaldehyd Harz-Klebstoff (UF) und/oder Melamin-Formaldehyd Harz Klebstoff (MF), Polyurethan-Klebstoffe, Epoxidharz-Klebstoffe, Polyester-Klebstoffe. Vorliegend ist die Verwendung eines Polyurethan-Klebstoffes bevorzugt, wobei der Polyurethan-Klebstoff auf der Basis von aromatischen Polyisocyanaten, insbesondere Polydiphenylmethandiisocyanat (PMDI), Toluylendiisocyanat (TDI) und/oder Diphenylmethandiisocyanat (MDI) vorliegt, wobei PMDI besonders bevorzugt ist.In one embodiment of the present method, a polymer adhesive is preferably used as a binder, which is selected from the group containing formaldehyde adhesives, such as urea-formaldehyde resin adhesive (UF) and / or melamine-formaldehyde resin adhesive (MF), polyurethane adhesives , Epoxy resin adhesives, polyester adhesives. In the present case, the use of a polyurethane adhesive is preferred, the polyurethane adhesive being based on aromatic polyisocyanates, in particular polydiphenylmethane diisocyanate (PMDI), tolylene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI), with PMDI being particularly preferred.
In einer Variante des vorliegenden Verfahrens werden die wasserdampfbehandelten und nicht-wasserdampfbehandelten Holzstrands mit einer Bindemittelmenge von 1,0 bis 5,0 Gew%, bevorzugt 2 bis 4 Gew%, insbesondere 3 Gew% (bezogen auf die Gesamtmenge der Holzstrands) beleimt.In a variant of the present process, the steam-treated and non-steam-treated wooden strands are glued with an amount of binding agent of 1.0 to 5.0% by weight, preferably 2 to 4% by weight, in particular 3% by weight (based on the total amount of wooden strands).
Es ist ebenfalls möglich, zusammen oder separat mit dem Bindemittel den Holzstrands mindestens ein Flammschutzmittel zuzuführen. Das Flammschutzmittel kann typischerweise in einer Menge zwischen 1 und 20 Gew%, bevorzugt zwischen 5 und 15 Gew%, insbesondere bevorzugt ≥10 Gew% bezogen auf die Gesamtmenge der Holzstrands zugegeben werden. Typische Flammschutzmittel sind ausgewählt aus der Gruppe umfassend Phosphate, Sulfate Borate, insbesondere Ammoniumpolyphosphat, Tris(tri-bromneopentyl)phosphat, Zinkborat oder Borsäurekomplexe von mehrwertigen Alkoholen.It is also possible to add at least one flame retardant to the wooden strands together or separately with the binder. The flame retardant can typically be added in an amount between 1 and 20% by weight, preferably between 5 and 15% by weight, particularly preferably 10% by weight, based on the total amount of the wooden strands. Typical flame retardants are selected from the group comprising phosphates, sulfates, borates, in particular ammonium polyphosphate, tris (tri-bromoneopentyl) phosphate, zinc borate or boric acid complexes of polyhydric alcohols.
Die beleimten (wasserdampfbehandelten und/oder nicht- wasserdampfbehandelten) Holzstrands werden auf ein Transportband unter Ausbildung einer ersten Deckschicht längs zur Transportrichtung, anschließend unter Ausbildung einer Mittelschicht quer zur Transportrichtung und abschließend unter Ausbildung einer zweiten Deckschicht längs zur Transportrichtung aufgestreut.The glued (steam-treated and / or non-steam-treated) wooden strands are sprinkled on a conveyor belt with the formation of a first cover layer along the transport direction, then with the formation of a middle layer transversely to the transport direction and finally with the formation of a second cover layer along the transport direction.
Nach dem Aufstreuen erfolgt das Verpressen der beleimten Holzstrands bei Temperaturen zwischen 200 und 250°C, bevorzugt 220 und 230°C zu einer OSB-Holzwerkstoffplatte.After being sprinkled on, the glued wooden strands are pressed at temperatures between 200 and 250 ° C., preferably 220 and 230 ° C., to form an OSB wood-based panel.
In einer ersten bevorzugten Ausführungsform umfasst das vorliegende Verfahren zur Herstellung einer OSB-Holzwerkstoffplatte mit reduzierter VOC-Emission die folgenden Schritte:
- Herstellen von Holzstrands aus geeigneten Hölzern, insbesondere mittels Zerspanen von geeigneten Hölzern,
- Behandeln von der Holzstrands mit Wasserdampf mit einer Temperatur zwischen 80°C und 120°C bei einem
Druck zwischen 0,5 bar und 2 bar, in sauerstofffreier oder sauerstoffarmer Atmosphäre; - Trocknen der mit dem Wasserdampf behandelten Holzstrands;
- Sichten und Separieren der wasserdampfbehandelten Holzstrands in Holzstrands geeignet zur Verwendung als Mittelschicht und Deckschicht;
- Beleimen der separierten Holzstrands;
- Aufstreuen der beleimten wasserdampfbehandelten Holzstrands auf ein Transportband in der Reihenfolge erste untere Deckschicht, Mittelschicht und zweite obere Deckschicht; und
- Verpressen der beleimten Holzstrands zu einer OSB-Holzwerkstoffplatte.
- Manufacture of wooden strands from suitable woods, in particular by cutting suitable woods,
- Treating the wooden strands with water vapor at a temperature between 80 ° C and 120 ° C at a pressure between 0.5 bar and 2 bar, in an oxygen-free or oxygen-poor atmosphere;
- Drying the wooden strands treated with the steam;
- Sifting and separating the steam-treated wooden strands in wooden strands suitable for use as a middle layer and top layer;
- Gluing the separated wooden strands;
- Scattering the glued, steam-treated wooden strands onto a conveyor belt in the sequence first lower cover layer, middle layer and second upper cover layer; and
- Pressing the glued wooden strands to form an OSB wood-based panel.
In einer zweiten bevorzugten Ausführungsform umfasst das vorliegende Verfahren zur Herstellung einer OSB-Holzwerkstoffplatte mit reduzierter VOC-Emission die folgenden Schritte:
- Herstellen von Holzstrands aus geeigneten Hölzern, insbesondere mittels Zerspanen von geeigneten Hölzern;
- Sichten und Separieren der Holzstrands in Holzstrands geeignet zur Verwendung als Mittelschicht und Deckschicht;
- Behandeln der für die Mittelschicht vorgesehenen Holzstrands und/oder der für die Deckschicht(en) vorgesehenen Holzstrands mit Wasserdampf mit einer Temperatur zwischen 80°C und 120°C bei einem
Druck zwischen 0,5 bar und 2 bar, in sauerstofffreier oder sauerstoffarmer Atmosphäre; - Trocknen der mit dem Wasserdampf behandelten Holzstrands;
- Beleimen der separierten wasserdampfbehandelten Holzstrands und Beleimen von nicht-wasserdampfbehandelten Holzstrands;
- Aufstreuen der beleimten wasserdampfbehandelten und nicht-wasserdampfbehandelten Holzstrands auf ein Transportband in der Reihenfolge erste untere Deckschicht, Mittelschicht und zweite obere Deckschicht; und
- Verpressen der beleimten Holzstrands zu einer OSB-Holzwerkstoffplatte.
- Manufacture of wooden strands from suitable woods, in particular by means of machining suitable woods;
- Sifting and separating the wooden strands into wooden strands suitable for use as a middle layer and top layer;
- Treating the wooden strands intended for the middle layer and / or the wooden strands intended for the top layer (s) with steam at a temperature between 80 ° C and 120 ° C at a pressure between 0.5 bar and 2 bar, in an oxygen-free or oxygen-poor atmosphere;
- Drying the wooden strands treated with the steam;
- Gluing of the separated steam-treated wooden strands and gluing of non-steam-treated wooden strands;
- Scattering the glued, steam-treated and non-steam-treated wooden strands onto a conveyor belt in the order of first lower cover layer, middle layer and second upper cover layer; and
- Pressing the glued wooden strands to form an OSB wood-based panel.
Entsprechend ermöglicht das vorliegende Verfahren die Herstellung einer OSB-Holzwerkstoffplatte mit reduzierter Emission an flüchtigen organischen Verbindungen (VOCs), welche wasserdampfbehandelte Holzstrands umfasst.Accordingly, the present method enables the production of an OSB wood-based panel with reduced emissions of volatile organic compounds (VOCs), which comprises steam-treated wooden strands.
Die vorliegende OSB-Holzwerkstoffplatte kann dabei vollständig aus wasserdampfbehandelten Holzstrands oder aus einem Gemisch von wasserdampfbehandelten und nicht-wasserdampfbehandelten Holzstrands bestehen. In einer Ausführungsform bestehen beide Deckschichten und die Mittelschicht der OSB aus wasserdampfbehandelten Holzstrands, in einer weiteren Ausführungsform bestehen die beiden Deckschichten aus nicht-wasserdampfbehandelten Holzstrands und die Mittelschicht aus wasserdampfbehandelten Holzstrands und in einer noch weiteren Ausführungsform bestehen die beiden Deckschichten aus wasserdampfbehandelten Holzstrands und die Mittelschicht aus nicht-wasserdampfbehandelten Holzstrands.The present OSB wood-based panel can consist entirely of steam-treated wooden strands or a mixture of steam-treated and non-steam-treated wooden strands. In one embodiment, both outer layers and the middle layer of the OSB consist of steam-treated wooden strands, in a further embodiment the two outer layers consist of non-steam-treated wooden strands and the middle layer consist of steam-treated wooden strands and in yet another embodiment the two outer layers consist of steam-treated wooden strands and the middle layer made of non-steam-treated wooden beaches.
Die vorliegende OSB-Holzwerkstoffplatte kann eine Rohdichte zwischen 300 und 1000 kg/m3, bevorzugt zwischen 500 und 800 kg/m3, insbesondere bevorzugt zwischen 500 und 600 kg/m3 aufweisen.The present OSB wood-based panel can have a bulk density between 300 and 1000 kg / m 3 , preferably between 500 and 800 kg / m 3 , particularly preferably between 500 and 600 kg / m 3 .
Die Dicke der vorliegenden OSB-Holzwerkstoffplatte kann zwischen 5 und 50 mm, bevorzugt zwischen 10 und 40 mm betragen, wobei insbesondere eine Dicke zwischen 15 und 25 mm bevorzugt ist.The thickness of the present OSB wood-based panel can be between 5 and 50 mm, preferably between 10 and 40 mm, a thickness between 15 and 25 mm being particularly preferred.
Die mit dem vorliegenden Verfahren hergestellte OSB-Holzwerkstoffplatte weist eine reduzierte Emission von während des Holzaufschlusses freigesetzten Aldehyden, insbesondere Pentanal oder Hexanal, und/oder Terpenen, insbesondere Caren und Pinen auf. Die Freisetzung von Aldehyden erfolgt während des Zerspanungsprozesses und einer damit verbundenen wässrige Aufarbeitung und Reinigung der Holzstrands. Dabei können spezifische Aldehyde aus den Grundbausteinen der Zellulose oder Hemizellulose gebildet werden. So wird z.B. der Aldehyd Furfural aus Mono-und Disacchariden der Zellulose bzw. Hemizellulose gebildet, während aromatische Aldehyde aus Lignin freigesetzt werden können. Die aliphatischen Aldehyde (gesättigt und ungesättigt) werden durch die Fragmentierung von Fettsäuren unter Beteiligung von Sauerstoff gebildet.The OSB wood-based panel produced with the present method has a reduced emission of aldehydes released during the wood digestion, in particular pentanal or hexanal, and / or terpenes, in particular carene and pinene. The release of aldehydes occurs during the machining process and the associated aqueous processing and cleaning of the wooden strands. Specific aldehydes can be formed from the basic building blocks of cellulose or hemicellulose. For example, the aldehyde furfural is formed from mono- and disaccharides of cellulose or hemicellulose, while aromatic aldehydes can be released from lignin. The aliphatic aldehydes (saturated and unsaturated) are formed by the fragmentation of fatty acids with the participation of oxygen.
Aufgrund des Einsatzes von wasserdampfbehandelten Holzstrands erfolgt eine Reduzierung der Emission von C2-C10 Aldehyden, insbesondere bevorzugt von Acetaldehyd, Pentanal, Hexanal oder auch Furfural, sowie eine Reduzierung von freigesetzten Terpenen, insbesondere C10-Monoterpene und C15-Sesquiterpene, insbesondere bevorzugt acyclische oder cyclische Monoterpene in den OSB-Holzwerkstoffplatten.Due to the use of steam-treated wooden strands, there is a reduction in the emission of C 2 -C 10 aldehydes, particularly preferably acetaldehyde, pentanal, hexanal or also furfural, and a reduction in released terpenes, in particular C 10 monoterpenes and C 15 sesquiterpenes, in particular preferably acyclic or cyclic monoterpenes in the OSB wood-based panels.
Typische acyclische Terpene sind Terpenkohlenwasserstoffe wie Myrcen, Terpenalkohole wie Gerianol, Linaool, Ipsinol und Terpenaldehyde wie Citral. Typische Vertreter der monocyclischen Terpene sind p-Menthan, Terpeninol, Limonen oder Carvon, und typische Vertreter der bicyclischen Terpene sind Caran, Pinan, Bornan, wobei insbesondere 3-Caren und α-Pinen von Bedeutung sind. Terpene sind Bestandteile der Baumharze und von daher besonders in sehr harzhaltigen Baumarten wie Kiefer oder Fichte vorhanden.Typical acyclic terpenes are terpene hydrocarbons such as myrcene, terpene alcohols such as gerianol, linaool, ipsinol and terpene aldehydes such as citral. Typical representatives of the monocyclic terpenes are p-menthane, terpeninol, limonene or carvone, and typical representatives of the bicyclic terpenes are carane, pinane, bornane, 3-carene and α-pinene being particularly important. Terpenes are components of tree resins and are therefore particularly present in very resinous tree species such as pine or spruce.
Auch kann die Emission von organischen Säuren, insbesondere die Emission von Essigsäure aus OSB-Holzwerkstoffplatten reduziert werden. Organische Säuren fallen insbesondere als Spaltprodukte der Holzbestandteile Zellulose, Hemizellulose und Lignin an, wobei bevorzugt Alkansäuren, wie Essigsäure und Propionsäure oder aromatische Säuren gebildet werden.The emission of organic acids, in particular the emission of acetic acid from OSB wood-based panels, can also be reduced. Organic acids occur in particular as cleavage products of the wood components cellulose, hemicellulose and lignin, whereby alkanoic acids such as acetic acid and propionic acid or aromatic acids are preferably formed.
Insbesondere die starke Reduzierung der Aldehyde war für den Fachmann in keiner Weise vorhersehbar. So kann angenommen werden, dass sich während der Wasserdampfbehandlung Wasser an die Doppelbindungen der ungesättigten Fettsäuren anlagert und so eine Aldehydbildung vermieden wird. Derartige Additionen verlaufen jedoch üblicherweise wegen der geringen Elektrophilie von Wasser nur in Anwesenheit von Mineralsäuren (Schwefelsäure, Phosphorsäure usw.) bei höheren Temperaturen.In particular, the sharp reduction in aldehydes could not be foreseen in any way by the person skilled in the art. It can thus be assumed that water accumulates on the double bonds of the unsaturated fatty acids during the steam treatment, thus avoiding the formation of aldehydes. However, because of the low electrophilicity of water, such additions usually only take place in the presence of mineral acids (sulfuric acid, phosphoric acid, etc.) at higher temperatures.
Das vorliegende Verfahren wird in einer Produktionslinie zur Herstellung einer OSB-Platte durchgeführt und umfasst die vorliegenden Elemente:
- mindestens eine Vorrichtung zum Entrinden von geeigneten Holzstämmen;
- mindestens einen Zerspaner zum Zerspanen der entrindeten Holzstämmen in Holzstrands;
- mindestens eine oben beschriebene Vorrichtung zur Wasserdampfbehandlung von mindestens einem Teil der Holzstrands;
- mindestens einen Trockner zum Trocknen der wasserdampfbehandelten Holzstrands;
- mindestens eine Vorrichtung zum Sichten und Separieren der Holzstrands (wasserdampfbehandelt und nicht-wasserdampfbehandelt);
- mindestens eine Vorrichtung zum Beleimen der Holzstrands;
- mindestens eine Vorrichtung zum Streuen der beleimten Holzstrands auf ein Transportband, und
- mindestens eine Presse zum Verpressen der gestreuten Holzstrands zu OSB.
- at least one device for debarking suitable logs;
- at least one chipper for chipping the debarked logs in wooden strands;
- at least one device described above for the steam treatment of at least part of the wooden strands;
- at least one dryer for drying the steamed wooden strands;
- at least one device for sifting and separating the wooden strands (steam-treated and non-steam-treated);
- at least one device for applying glue to the wooden strands;
- at least one device for scattering the glued wooden strands onto a conveyor belt, and
- at least one press for pressing the scattered wooden strands to form OSB.
Wie oben bereits angemerkt, kann die Bedampfungsanlage kontinuierlich ausgelegt sein. Hierzu werden die Holzstrands auf ein Tramsportband aufgebracht, welches die Holzstrands mit einer vorgegeben Geschwindigkeit durch die Bedampfungsanlage führt. Während des Durchlaufs durch die Bedampfungsanlage werden die Holzstrands gleichmäßig mit Wasserdampf besprüht, der aus oberhalb des Transportbandes vorgesehenen Düsen eingebracht wird.As noted above, the vapor deposition system can be designed to be continuous. For this purpose, the wooden strands are applied to a tramsport belt, which guides the wooden strands through the steaming system at a specified speed. During the passage through the steaming system, the wooden strands are evenly sprayed with water vapor, which is introduced from nozzles provided above the conveyor belt.
Die Bedampfungsanlage kann vor (stromaufwärts) der Vorrichtung zum Sichten und Separieren der Holzstrands vorgesehen sein. In diesem Falle werden alle Holzstrands einer Wasserdampfbehandlung ausgesetzt.The steaming system can be provided in front of (upstream) the device for sifting and separating the wooden strands. In this case, all wooden beaches are subjected to steam treatment.
Es ist aber auch möglich, dass zwei Bedampfungsanlagen hinter (stromabwärts) der Vorrichtung zum Sichten und Separieren der Holzstrands vorgesehen sein. In diesem Falle dient eine Bedampfungsanlage der Wasserdampfbehandlung der Holzstrands die für die Mittelschicht vorgesehen sind, und die andere Bedampfungsanlage der Wasserdampfbehandlung der Holzstrands die für die Deckschichten vorgesehen sind. Dies ermöglicht eine wahlweise Wasserdampfbehandlung der Holzstrands für die Mittelschicht oder der Holzstrands für die Deckschichten.However, it is also possible for two steaming systems to be provided behind (downstream) the device for sifting and separating the wooden strands. In this case, one steam treatment system is used for the steam treatment of the wooden strands that are provided for the middle layer, and the other steam treatment system for the steam treatment of the wooden strands that are provided for the top layers. This enables an optional steam treatment of the wooden strands for the middle layer or the wooden strands for the top layers.
Die Erfindung wird nachfolgend unter Bezugnahme auf die Figuren an einemThe invention is described below with reference to the figures on a
Ausführungsbeispiel näher erläutert. Sie zeigen:
- Figur 1
- eine schematische Darstellung einer Ausführungsform einer Vorrichtung zur Wasserdampfbehandlung von Holzstrands;
Figur 2- eine schematische Darstellung einer ersten Ausführungsform des Verfahrens zur Herstellung von OSB-Platten, und
Figur 3- eine schematische Darstellung einer zweiten Ausführungsform des Verfahrens.
- Figure 1
- a schematic representation of an embodiment of a device for the steam treatment of wooden strands;
- Figure 2
- a schematic representation of a first embodiment of the method for producing OSB panels, and
- Figure 3
- a schematic representation of a second embodiment of the method.
Die vorliegende Vorrichtung 10 ermöglicht eine Dampfbehandlung der Strands noch vor der Trocknung der Strands im Trommeltrockner. Dabei können alle oder Teile der Strands, die für die spätere Herstellung der OSB vorgesehen sind, behandelt werden. Die Behandlung erfolgt bei Normaldruck und erreicht durch die Verwendung des Transportbandes 12 aus Metallgewebe die homogene Behandlung der Strands mit Dampf.The
Das Band der Transportvorrichtung ist dabei so dimensioniert, dass die Strands nicht durch die Lücken hindurch fallen können. Dabei werden die Strands direkt nach der Herstellung an das Transportband 12 übergeben, das durch den Rohrkörper 11 verläuft. Auf dem Transportband 12 sind die Strands so verteilt, dass eine homogene Durchströmung der Strands mit Wasserdampf möglich ist. In regelmäßigen Abständen positionierte Vereinzelungsstationen sorgen für die Auflösung von vorhandenen oder sich bildenden Strandhaufen.The belt of the transport device is dimensioned so that the strands cannot fall through the gaps. The strands are transferred to the
Da das Transportband 12 durch sich bei der Erwärmung der Strands bildendes Kondensat gekühlt wird und im Vergleich zu den Strands eine relativ hohe Masse besitzt, ist eine Erwärmung des Bandes vor dem Aufstreuen der Strands vorzusehen. Dies beschleunigt die Erwärmung der Strands und reduziert damit die Behandlungsdauer mit Dampf. Die Erwärmung kann durch Widerstandsheizung oder durch Strahlung erfolgen.Since the
Von oben wird dann durch Düsen 14 auf die Strands Dampf appliziert. Der Dampf besitzt eine Temperatur von ca. 100 °C. Durch die Isolierung der Metallröhre 11 wird sichergestellt, dass die Wärmeverluste möglichst gering sind. Das sich bildende Kondensat wird unter der Transportvorrichtung 12 aufgefangen, von Schwebstoffen befreit und nach einem Reinigungsschritt zur Entfernung von gelösten Stoffen dem System wieder zu geführt.Steam is then applied to the strands from above through
Die Verweilzeit der Strands in der Sattdampfatmosphäre liegt bei 5 bis 15 min. In regelmäßigen Abständen wird der Fortschritt der Stranderwärmung durch Thermofühler festgestellt. Die Temperatur der Strands soll am Ende der Behandlung nahe 90°C sein.The dwell time of the strands in the saturated steam atmosphere is 5 to 15 minutes.The progress of the beach warming is determined by thermal sensors at regular intervals. The temperature of the beaches should be close to 90 ° C at the end of the treatment.
Die in
Entsprechend wird zunächst in Schritt 1 geeignetes Holzausgangsmaterial zur Herstellung der Holzstrands bereitgestellt. Als Holzausgangsmaterial sind sämtliche Nadelhölzer, Laubhölzer oder auch Mischungen davon geeignet.Correspondingly, in step 1, suitable wood starting material for the production of the wooden strands is initially provided. All conifers, hardwoods or mixtures thereof are suitable as the starting material for wood.
Das Entrinden (Schritt 2) und das Zerspanen (Schritt 3) des Holzausgangsmaterials erfolgt in hierfür geeigneten Zerspanern, wobei die Größe der Holzstrands entsprechend gesteuert werden kann. Nach Zerkleinerung und Bereitstellung der Holzstrands werden diese ggf. einem Vortrocknungsprozess unterzogen, wobei eine Feuchte von 5-10 % in Bezug auf die Ausgangsfeuchte der Holzstrands eingestellt wird (nicht gezeigt).The debarking (step 2) and the chipping (step 3) of the wood raw material takes place in suitable chippers, whereby the size of the wood strand can be controlled accordingly. After the wooden strands have been comminuted and made available, they may be subjected to a pre-drying process, with a moisture content of 5-10% in relation to the initial moisture content of the wooden strands being set (not shown).
Im Falle der in
Nach Abschluss der Wasserdampfbehandlung, die im vorliegenden Fall ca. 10-20 Minuten dauert, werden die wasserdampfbehandelten Holzstrands getrocknet (Schritt 9), gesichtet und separiert (Schritt 5).After completion of the steam treatment, which in the present case lasts approx. 10-20 minutes, the steam-treated wooden strands are dried (step 9), sifted and separated (step 5).
Es erfolgt eine Separierung in Holzstrands zur Verwendung als Mittelschicht (Schritt 6a) oder als Deckschicht (Schritt 6b) mit jeweiliger Beleimung.There is a separation in wooden strands for use as a middle layer (step 6a) or as a top layer (
Die beleimten wasserdampfbehandelten Holzstrands werden auf ein Transportband in der Reihenfolge erste untere Deckschicht, Mittelschicht und zweite obere Deckschicht aufgestreut (Schritt 7) und anschließend zu einer OSB-Holzwerkstoffplatte verpresst (Schritt 8).The glued, steam-treated wooden strands are sprinkled on a conveyor belt in the order first lower cover layer, middle layer and second upper cover layer (step 7) and then pressed to form an OSB wood-based panel (step 8).
In der in
Im Unterschied zu der Ausführungsvariante der
Daran schließt sich die Wasserdampfbehandlung der für die Mittelschicht vorgesehenen Holzstrands (Schritt 4a) und/oder Wasserdampfbehandlung der für die Deckschicht(en) vorgesehene Holzstrands (Schritt 4b) in einer jeweils geeigneten Bedampfungsanlage an. Die Wasserdampfbehandlung der Holzstrands erfolgt in einem Temperaturbereich zwischen 80° und 120°C bei einem Druck zwischen 0,5 bar und 2 bar. Das dabei entstehende Kondensat kann aufgefangen werden und die aus den Holzstrands ausgewaschenen Stoffe (Terpene, Aldehyde) können aus dem Kondensat einer weiteren Verwendung zugeführt werden.This is followed by the steam treatment of the wooden strands intended for the middle layer (step 4a) and / or steam treatment of the wooden strands intended for the top layer (s) (step 4b) in a respectively suitable steaming system. The steam treatment of the wooden strands takes place in a temperature range between 80 ° and 120 ° C at a pressure between 0.5 bar and 2 bar. The resulting condensate can be collected and the substances washed out of the wooden strands (terpenes, aldehydes) can be used from the condensate for further use.
Es ist auch möglich, dass lediglich die Holzstrands für die Mittelschicht einer Wasserdampfbehandlung unterliegen, während die Holzstrands für die Deckschichten unbehandelt bleiben.It is also possible that only the wooden strands for the middle layer are subjected to a steam treatment, while the wooden strands for the outer layers remain untreated.
Nach Abschluss der Wasserdampfbehandlung, die im vorliegenden Fall ca. 10-20 Minuten dauert, werden die wasserdampfbehandelten Holzstrands getrocknet (Schritt 9a, 9b) und beleimt (Schritte 6 a,b).After completion of the steam treatment, which in the present case takes about 10-20 minutes, the steam-treated wooden strands are dried (
Die beleimten wasserbehandelten Holzstrands werden auf ein Transportband in der Reihenfolge erste untere Deckschicht, Mittelschicht und zweite obere Deckschicht aufgestreut (Schritt 7) und anschließend zu einer OSB-Holzwerkstoffplatte verpresst (Schritt 8).The glued, water-treated wooden strands are sprinkled on a conveyor belt in the sequence first lower cover layer, middle layer and second upper cover layer (step 7) and then pressed to form an OSB wood-based panel (step 8).
In der Endbearbeitung wird die erhaltene OSB-Holzwerkstoffplatte jeweils in geeigneter Weise konfektioniert.In the final processing, the OSB wood-based panel obtained is made up in a suitable manner.
Ausführungsbeispiel 1:
Aus Kiefernstämmen werden Strands erzeugt (Länge: max. 200 mm, Breite: 20 mm, Dicke: max. 1 mm, Feuchte max. 50%) und in einem kontinuierlich arbeitenden Prozess mit etwa 100°C heißem Wasserdampf behandelt. Bei der Behandlung befinden sich die Strands lose aufgeschüttet auf einem Transportband, welches Perforierungen aufweist und dadurch den Durchtritt des Dampfes nach Passieren der Strands zulässt. Die Dampfbehandlung erfolgte vorzugsweise von oben nach unten. Das Transportband wird durch einen Rohrkörper geführt. Vorzugsweise sind oberhalb des Transportbandes mit den lose aufgeschütteten Strands Düsen angebracht sind, die den Dampf gleichmäßig über den Strands verteilt. Die Behandlung mit Dampf erfolgt über etwa 15 min. Die Dampfbehandlung findet unter weitest gehendem Sauerstoffausschluss statt, sodass von einer reduktiven Prozessführung gesprochen werden kann.Embodiment 1:
Strands are produced from pine trunks (length: max. 200 mm, width: 20 mm, thickness: max. 1 mm, humidity max. 50%) and treated with steam at around 100 ° C in a continuous process. During the treatment, the strands are loosely piled up on a conveyor belt, which has perforations and thus allows the steam to pass through after passing through the strands. The steam treatment was preferably carried out from top to bottom. The conveyor belt is guided through a tubular body. Preferably they are above the conveyor belt with the loosely poured strands Nozzles are attached, which distribute the steam evenly over the strands. The treatment with steam takes about 15 minutes.The steam treatment takes place with the greatest possible exclusion of oxygen, so that one can speak of a reductive process management.
Der Rohrkörper weist zur Erzielung einer Verweilzeit von etwa 15 min einen Durchmesser von 50 cm bei einer Länge von 3 m auf. Das Transportband wurde mit einer Geschwindigkeit von etwa 2 m/ 10 Minuten durch das Rohrkörper bewegt. In Vorschubrichtung war der Rohrkörper leicht nach oben gewinkelt (2 bis 10 Grad), sodass, das sich bildende Kondensat leicht aufgefangen werden konnte. Dabei handelt es sich um eine Versuchsanlage mit der der Effekt nachgewiesen werden sollte. Für eine Produktionsanlage kann diese vergrößert und in Bezug auf die Transportgeschwindigkeit sowie Menge leicht durch den Fachmann optimiert werden.The tube body has a diameter of 50 cm and a length of 3 m to achieve a residence time of about 15 minutes. The conveyor belt was moved through the pipe body at a speed of about 2 m / 10 minutes. In the feed direction, the pipe body was angled slightly upwards (2 to 10 degrees) so that the condensate that formed could easily be caught. This is a test facility with which the effect should be demonstrated. For a production plant, this can be enlarged and easily optimized by a person skilled in the art in terms of transport speed and quantity.
Danach werden die Strands in einem üblichen Trommeltrockner getrocknet. Der Energiebedarf des Trommeltrockners reduziert sich dabei deutlich, da die Strands beim Eintritt in den Trockner bereits eine Temperatur von etwa 90°C aufweisen. Dann werden sie in einem Coil mit Klebstoff, vorzugsweise mit PMDI beleimt (ca. 3 Gew% auf atro Holz).The strands are then dried in a conventional drum dryer. The energy requirement of the drum dryer is significantly reduced, as the strands already have a temperature of around 90 ° C when they enter the dryer. Then they are glued in a coil with adhesive, preferably with PMDI (approx. 3% by weight on absolutely dry wood).
Die beleimten Stands werden in einer üblichen OSB-Anlage als Deck- und Mittelschicht gestreut. Die prozentuale Verteilung zwischen Mittel- und Deckschicht beträgt vorzugsweise 70% zu 30%. Die Strands werden zu Platten verpresst, die eine Rohdichte von etwa 570 kg/m3 haben. Nach einer Lagerzeit von einer Woche wurde die Versuchsplatte zusammen mit einer Standardplatte in gleicher Stärke in einer Mikrokammer auf die VOC-Abgabe geprüft.The glued stands are scattered in a standard OSB system as a top and middle layer. The percentage distribution between the middle and top layers is preferably 70% to 30%. The strands are pressed into panels with a gross density of around 570 kg / m3. After a storage time of one week, the test plate was tested for the VOC release together with a standard plate of the same thickness in a microchamber.
Kammerparameter: Temperatur: 23°C; Feuchte: 0%; Luftdurchfluss: 150 ml/min; Luftwechsel: 188 / h; Beladung: 48,8 m2/m3; Probenoberfläche: 0, 003 m2; Kammervolumen: 48 ml. Die Werte der mengenmäßig wichtigsten Parameter sind in der Tabelle 1 dargestellt.
Wie aus den Ergebnissen zu entnehmen ist, werden die Emissionen der mengenmäßig wichtigsten Parameter deutlich reduziert. Einige Parameter konnten gar nicht mehr detektiert werden. Dies gilt überraschenderweise auch für die gesättigten und ungesättigten Aldehyde, die sich nach dem als richtig und plausibel angenommenen Bildungsweg, erst in der Presse bei hohen Temperaturen bilden sollten. Dies bedeutet, dass entweder der bisher angenommene Mechanismus zur Bildung der Aldehyde falsch ist oder bei der Dampfbehandlung die Vorprodukte der Aldehyde chemisch so umgewandelt werden, dass die Bildung der Aldehyde nur noch eingeschränkt möglich ist. Ursprünglich war damit gerechnet worden, dass durch die Dampfbehandlung lediglich eine Reduzierung der Terpenemission erfolgen würde. Diese würden in dem Prozess wie in einer Wasserdampfdestillation ausgetrieben.As can be seen from the results, emissions of the most important parameters in terms of quantity are significantly reduced. Some parameters could no longer be detected at all. Surprisingly, this also applies to the saturated and unsaturated aldehydes which, according to the formation path assumed to be correct and plausible, should only form in the press at high temperatures. This means that either the previously assumed mechanism for the formation of the aldehydes is wrong or the preliminary products of the aldehydes are chemically converted during steam treatment in such a way that the formation of the aldehydes is only possible to a limited extent. It was originally expected that steam treatment would only reduce terpene emissions. These would be driven out in the process as in a steam distillation.
Entspricht Ausführungsbeispiel 1, wobei jedoch abweichend nur Strands für die Mittelschicht (etwa 70% der OSB) mit Dampf behandelt wurden, mit dem nachfolgenden Ergebnis der VOC Prüfung:
Kammerparameter: Temperatur: 23°C; Feuchte: 0%; Luftdurchfluss: 150 ml/min; Luftwechsel: 188 / h; Beladung: 48,8 m2/m3; Probenoberfläche: 0, 003 m2; Kammervolumen: 48 ml. Die Werte der mengenmäßig wichtigsten Parameter sind in der Tabelle 2 dargestellt.
Chamber parameters: temperature: 23 ° C; Humidity: 0%; Air flow: 150 ml / min; Air change: 188 / h; Loading: 48.8 m 2 / m3; Sample surface: 0.003 m 2 ; Chamber volume: 48 ml. The values of the most important parameters in terms of quantity are shown in Table 2.
Auch hier ist eine deutliche Reduzierung der Emission zu beobachten, obwohl die Deckschicht aus Standardstrands besteht.Here, too, a significant reduction in emissions can be observed, although the top layer consists of standard strands.
Claims (14)
- OSB wood-based panel with reduced emission of volatile organic compounds (VOCs) comprising- wood strands,wherein the OSB wood material board has a reduced emission of aldehydes and terpenes released during the wood disintegration, wherein no additives are added to the water vapour, in particular no bleaching agents such as bisulphites or oxygen-releasing substances, and wherein the at least one binder has no VOC scavenger.wherein the wood strands are obtained by wood disintegration by means of chipping and associated aqueous treatment and purification,wherein the wood strands are treated with saturated water vapour after wood disintegration without drying, the water vapour being passed over the wood strands at a temperature between 80°C and 120°C and a pressure between 0.5 bar and 2 bar,wherein the water vapor treated wood strands or a mixture of water vapor treated wood strands and non-water vapor treated wood strands form a middle layer and/or top layer of the OSB wood-based panel; andat least one polyurethane adhesive as binder,
- The OSB wood-based panel according to claim 1, characterized in that the water vapor-treated wood strands are used in all layers of the OSB wood-based panel.
- OSB wood-based panel according to claim 1, characterized in that the water vapor-treated wood strands are used only in the middle layer and non-water vapor-treated wood strands are used in one or both top layers of the OSB wood-based panel.
- OSB wood-based panel according to claim 1, characterized in that the water vapor-treated wood strands are used only in one or both top layers and non-water vapor-treated wood strands are used in the middle layer of the OSB wood-based panel.
- OSB wood-based panel according to claim 1, characterized in that a mixture having any ratio of water vapor-treated wood strands and non-water vapor-treated wood strands is used in the middle and top layers of the OSB wood-based panels.
- OSB wood-based panel according to claim 5, characterized in that the mixture comprises between 10 and 50% by weight, preferably between 20 and 30% by weight, of untreated or non-water vapour treated wood strands and between 50 and 90% by weight, preferably between 70 and 80% by weight, of water vapour treated wood strands.
- OSB wood-based panel according to one of the preceding claims, characterized in that a polyurethane adhesive based on aromatic polyisocyanates, in particular polydiphenylmethane diisocyanate (PMDI), toluylene diisocyanate (TDI) and/or diphenylmethane diisocyanate (MDI) is used as binder.
- OSB wood-based panel according to one of the preceding claims, characterized in that the water vapour-treated and non-water vapour-treated wood strands are glued with a binder amount of 1.0 to 5.0% by weight, preferably 2 to 4% by weight, in particular 3% by weight, based on the total amount of the wood strands.
- OSB wood-based panel according to one of the preceding claims, characterized in that at least one flame retardant is present, in particular in an amount between 1 and 20% by weight, preferably between 5 and 15% by weight, more preferably ≥10% by weight relative to the total amount of the wood strands.
- OSB wood-based panel according to one of the preceding claims, characterized by a reduced emission of C2-C10aldehydes released during wood disintegration, in particular acetaldehyde, pentanal, hexanal or furfural.
- OSB wood-based panel according to one of the preceding claims, characterized by a reduced emission of C10 monoterpenes and C15 sesquiterpenes, in particular carene and pinene, released during wood disintegration.
- OSB wood-based panel according to one of the preceding claims, characterized by a reduced emission of organic acids, in particular of alkanoic acids.
- OSB wood-based panel according to one of the preceding claims, characterized in that, in order to treat the wood strands with steam, the steam is passed over the wood strands at a temperature of between 90°C and 110°C, in particular preferably of 100°C, at a pressure of between 0.7 bar and 1.5 bar, in particular preferably at 1 bar.
- OSB wood-based panel according to one of the preceding claims, characterized in that the steam treatment of the wood strands is carried out over a period of from 5 to 30 min, preferably from 10 to 20 min, in particular preferably from 15 min.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19201042.9A EP3620282B1 (en) | 2017-04-25 | 2017-04-25 | Osb wood-based panel |
PT192010429T PT3620282T (en) | 2017-04-25 | 2017-04-25 | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) |
ES19201042T ES2904805T3 (en) | 2017-04-25 | 2017-04-25 | OSB wood-derived material board |
PL19201042T PL3620282T3 (en) | 2017-04-25 | 2017-04-25 | Osb wood-based panel |
HUE19201042A HUE057379T2 (en) | 2017-04-25 | 2017-04-25 | Osb wood-based panel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19201042.9A EP3620282B1 (en) | 2017-04-25 | 2017-04-25 | Osb wood-based panel |
EP17167974.9A EP3395520B1 (en) | 2017-04-25 | 2017-04-25 | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17167974.9A Division EP3395520B1 (en) | 2017-04-25 | 2017-04-25 | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3620282A1 EP3620282A1 (en) | 2020-03-11 |
EP3620282B1 true EP3620282B1 (en) | 2021-11-03 |
Family
ID=58632289
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17167974.9A Active EP3395520B1 (en) | 2017-04-25 | 2017-04-25 | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) |
EP19201042.9A Active EP3620282B1 (en) | 2017-04-25 | 2017-04-25 | Osb wood-based panel |
EP18713575.1A Active EP3615288B1 (en) | 2017-04-25 | 2018-03-12 | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17167974.9A Active EP3395520B1 (en) | 2017-04-25 | 2017-04-25 | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18713575.1A Active EP3615288B1 (en) | 2017-04-25 | 2018-03-12 | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) |
Country Status (11)
Country | Link |
---|---|
US (2) | US11007668B2 (en) |
EP (3) | EP3395520B1 (en) |
CN (2) | CN110545971B (en) |
CA (1) | CA3060986C (en) |
ES (3) | ES2767090T3 (en) |
HU (3) | HUE048530T2 (en) |
PL (3) | PL3620282T3 (en) |
PT (2) | PT3620282T (en) |
RU (1) | RU2728871C1 (en) |
UA (1) | UA127129C2 (en) |
WO (1) | WO2018197094A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL3620282T3 (en) * | 2017-04-25 | 2022-02-21 | SWISS KRONO Tec AG | Osb wood-based panel |
SE543059C2 (en) * | 2019-03-07 | 2020-09-29 | Stora Enso Oyj | Device and method of processing logs using a thermal camera |
LT3872256T (en) | 2020-02-28 | 2022-04-11 | Fiberboard Gmbh | Method and treatment system for reducing volatile organic compounds from wood chips |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010050788A1 (en) * | 2010-11-10 | 2012-05-10 | FR. LÜRSSEN WERFT GmbH & Co.KG | Process for the treatment of wood and wood-based materials as well as wood and wood-based materials available therewith |
DE102013001678A1 (en) * | 2013-01-31 | 2014-07-31 | INNOLYSIA GbR (vertretungsberechtigte Gesellschafterin: Virginie Soua, 53639 Königswinter) | Method for treating timber used for oriented strand board, paper and cellulose, involves crushing timber products and treating timber with solution of oxidant and inert organic solvent in presence of water and carbon dioxide |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4610913A (en) * | 1986-02-14 | 1986-09-09 | Macmillan Bloedel Limited | Long wafer waferboard panels |
RU2068339C1 (en) * | 1989-02-14 | 1996-10-27 | СИ ЭС АР Лимитед | Device and method for continuous manufacture of wood particle boards |
DE3914106A1 (en) * | 1989-04-28 | 1990-10-31 | Siempelkamp Gmbh & Co | METHOD AND INSTALLATION FOR THE CONTINUOUS PRODUCTION OF CHIPBOARD, FIBERBOARD AND THE LIKE |
US5447686A (en) * | 1994-06-17 | 1995-09-05 | Seidner; Marc A. | Method for heat-treating wood and wood products |
DE4423632A1 (en) | 1994-07-06 | 1996-01-11 | Siempelkamp Gmbh & Co | Process for preheating grit to a pre-definable preheating temperature in the course of the manufacture of wood-based panels |
US5665798A (en) * | 1995-12-27 | 1997-09-09 | North Pacific Paper Corporation | Composite wood products from solvent extracted wood raw materials |
US6098679A (en) | 1998-03-17 | 2000-08-08 | Noranda Forest Inc. | Dimensionally stable oriented strand board (OSB) and method for making the same |
JP2001001318A (en) * | 1999-06-24 | 2001-01-09 | Yoji Kikata | Method for manufacturing lignocellulose molding from lignocellulose material |
DE20109675U1 (en) * | 2001-06-12 | 2002-10-24 | Fritz Egger Ges. M.B.H. & Co., Unterradlberg | Large format OSB board with improved properties, especially for the construction sector |
US7368037B2 (en) * | 2003-05-21 | 2008-05-06 | Masonite Corporation | Refiner steam separation system for reduction of dryer emissions |
US7258761B2 (en) * | 2004-11-12 | 2007-08-21 | Huber Engineered Woods Llc | Multi-step preheating processes for manufacturing wood based composites |
FI122651B (en) * | 2004-11-19 | 2012-05-15 | Metso Paper Inc | Process and apparatus for treating wood chips |
DE102005053981B4 (en) | 2004-11-27 | 2018-01-11 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Method and device for introducing steam into a mat or in its cover layers |
WO2007012350A1 (en) | 2005-07-27 | 2007-02-01 | Kronospan Technical Company Ltd. | Method for production of wood material articles with low emissions of chemical compounds |
CN101125436B (en) * | 2007-09-21 | 2011-11-30 | 沈阳重型机械集团有限责任公司 | Technology for producing wood wheat straw composite type directional structure board |
US20090077924A1 (en) * | 2007-09-21 | 2009-03-26 | Ainsworth Lumber Co., Ltd. | Methods of manufacturing engineered wood products |
EP2289980A1 (en) * | 2009-07-30 | 2011-03-02 | Danish Plant Fibre Technologies Holding A/S | A process and apparatus for modification of lignocellulosic materials and products of modified lignocellulosic materials obtained by the process |
CN101774203A (en) * | 2010-01-28 | 2010-07-14 | 吉发 | Method for producing fiber/particle boards |
JP5165044B2 (en) * | 2010-10-29 | 2013-03-21 | ニチハ株式会社 | Wood fiber board and manufacturing method thereof |
DE102012101716A1 (en) | 2012-03-01 | 2013-09-05 | Georg-August-Universität Göttingen Stiftung Öffentlichen Rechts | Process for the production of wood and / or composite materials |
PL2727691T3 (en) * | 2012-11-06 | 2015-04-30 | SWISS KRONO Tec AG | Method for reducing the emissions of volatile organic compounds from wooden materials and wooden material |
EP2765178A1 (en) | 2013-02-07 | 2014-08-13 | Arbaflame Technology AS | Method of producing carbon-enriched biomass material |
EP2889112A1 (en) | 2013-12-27 | 2015-07-01 | "Latvian State Institute of Wood Chemistry" Derived public person | Method for hydrothermal treatment of wood |
ES2660426T3 (en) * | 2015-11-18 | 2018-03-22 | SWISS KRONO Tec AG | OSB wood-oriented material board (oriented strand board) with improved properties and production process |
PL3620282T3 (en) * | 2017-04-25 | 2022-02-21 | SWISS KRONO Tec AG | Osb wood-based panel |
-
2017
- 2017-04-25 PL PL19201042T patent/PL3620282T3/en unknown
- 2017-04-25 ES ES17167974T patent/ES2767090T3/en active Active
- 2017-04-25 PT PT192010429T patent/PT3620282T/en unknown
- 2017-04-25 EP EP17167974.9A patent/EP3395520B1/en active Active
- 2017-04-25 EP EP19201042.9A patent/EP3620282B1/en active Active
- 2017-04-25 ES ES19201042T patent/ES2904805T3/en active Active
- 2017-04-25 HU HUE17167974A patent/HUE048530T2/en unknown
- 2017-04-25 PL PL17167974T patent/PL3395520T3/en unknown
- 2017-04-25 HU HUE19201042A patent/HUE057379T2/en unknown
- 2017-04-25 PT PT171679749T patent/PT3395520T/en unknown
-
2018
- 2018-03-12 CN CN201880027301.XA patent/CN110545971B/en active Active
- 2018-03-12 CA CA3060986A patent/CA3060986C/en active Active
- 2018-03-12 WO PCT/EP2018/056070 patent/WO2018197094A1/en unknown
- 2018-03-12 CN CN202011072179.3A patent/CN112476694B/en active Active
- 2018-03-12 EP EP18713575.1A patent/EP3615288B1/en active Active
- 2018-03-12 UA UAA201910564A patent/UA127129C2/en unknown
- 2018-03-12 PL PL18713575.1T patent/PL3615288T3/en unknown
- 2018-03-12 US US16/497,535 patent/US11007668B2/en active Active
- 2018-03-12 ES ES18713575T patent/ES2958617T3/en active Active
- 2018-03-12 HU HUE18713575A patent/HUE063434T2/en unknown
- 2018-03-12 RU RU2019133765A patent/RU2728871C1/en active
-
2021
- 2021-04-15 US US17/231,311 patent/US11904496B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010050788A1 (en) * | 2010-11-10 | 2012-05-10 | FR. LÜRSSEN WERFT GmbH & Co.KG | Process for the treatment of wood and wood-based materials as well as wood and wood-based materials available therewith |
DE102013001678A1 (en) * | 2013-01-31 | 2014-07-31 | INNOLYSIA GbR (vertretungsberechtigte Gesellschafterin: Virginie Soua, 53639 Königswinter) | Method for treating timber used for oriented strand board, paper and cellulose, involves crushing timber products and treating timber with solution of oxidant and inert organic solvent in presence of water and carbon dioxide |
Also Published As
Publication number | Publication date |
---|---|
EP3615288B1 (en) | 2023-07-05 |
US11007668B2 (en) | 2021-05-18 |
CA3060986A1 (en) | 2018-11-01 |
EP3615288C0 (en) | 2023-07-05 |
RU2728871C1 (en) | 2020-07-31 |
PL3395520T3 (en) | 2020-05-18 |
CA3060986C (en) | 2023-08-15 |
US11904496B2 (en) | 2024-02-20 |
PL3620282T3 (en) | 2022-02-21 |
CN112476694B (en) | 2022-06-28 |
CN110545971A (en) | 2019-12-06 |
HUE063434T2 (en) | 2024-01-28 |
EP3395520A1 (en) | 2018-10-31 |
PT3620282T (en) | 2022-01-13 |
ES2767090T3 (en) | 2020-06-16 |
CN112476694A (en) | 2021-03-12 |
WO2018197094A1 (en) | 2018-11-01 |
ES2904805T3 (en) | 2022-04-06 |
EP3615288A1 (en) | 2020-03-04 |
UA127129C2 (en) | 2023-05-10 |
US20200108523A1 (en) | 2020-04-09 |
CN110545971B (en) | 2020-11-03 |
HUE048530T2 (en) | 2020-07-28 |
EP3620282A1 (en) | 2020-03-11 |
PL3615288T3 (en) | 2023-12-18 |
US20210245391A1 (en) | 2021-08-12 |
EP3395520B1 (en) | 2019-10-30 |
PT3395520T (en) | 2020-02-03 |
HUE057379T2 (en) | 2022-05-28 |
ES2958617T3 (en) | 2024-02-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3377283B1 (en) | Osb (oriented strand board) - wood material board with improved properties and method for producing same | |
DE69813010T2 (en) | METHOD FOR PRODUCING COMPOSITE OBJECTS FROM CELLULOSE | |
EP3178622B1 (en) | Method of manufacturing of wood material board with reduced emission of volatile organic compounds (vocs) | |
EP3615288B1 (en) | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) | |
EP1519818B1 (en) | Mdf press technology | |
EP3453504B1 (en) | Method for the preparation of osb wood-base panels with reduced emission of volatile organic compounds (vocs) | |
EP2040895B1 (en) | Method for the production of material plates | |
EP1780243B1 (en) | Binder composition for wood materials | |
DD209773A5 (en) | METHOD FOR PRODUCING CHIPBOARDS | |
DE102009000109A1 (en) | Method for reducing emissions of wood and wood-based materials | |
EP2644340B1 (en) | Method for manufacturing wooden materials made of hackled products containing lignocellulose and such wooden materials | |
DE102015103511B4 (en) | Process for producing a wood chipboard and aminoplast curing agents used therein | |
DE2929243A1 (en) | WOODEN CHIPBOARD AND METHOD FOR THEIR PRODUCTION | |
WO2003013809A1 (en) | Panel consisting of a derived timber product and produced in an environmentally-friendly manner | |
EP3150345B1 (en) | Wood fiber insulating materials with reduced emission of volatile organic compounds (vocs) and method for their preparation | |
CH436699A (en) | Process for the production of molded parts, in particular panels, from chips of vegetable origin and device for performing the process | |
EP1414629B8 (en) | Panel consisting of a derived timber product and produced in an environmentally-friendly manner | |
DE102011118009A1 (en) | Method for manufacturing plates with three layers of lignocellulose or cellulose containing chips, involves procuring chips from palm fronds, particularly date-oil palm fronds, in which palm fronds of leaflets and of thorns are exempted | |
EP4122662A1 (en) | Method for producing fibreboard with reduced voc emissions | |
DE1914612A1 (en) | Fire-resistant fibreboard of asbestos and - wood fibre | |
DE2401282A1 (en) | METHOD OF MANUFACTURING A MAT FROM LIGNOCELLULOSE FIBERS | |
CH283067A (en) | Process for the production of composite fiber-particle boards. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AC | Divisional application: reference to earlier application |
Ref document number: 3395520 Country of ref document: EP Kind code of ref document: P |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20200908 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20201201 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B27N 3/14 20060101ALN20210527BHEP Ipc: B27K 1/00 20060101ALN20210527BHEP Ipc: B27K 1/02 20060101ALI20210527BHEP Ipc: B27N 1/00 20060101AFI20210527BHEP |
|
INTG | Intention to grant announced |
Effective date: 20210611 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AC | Divisional application: reference to earlier application |
Ref document number: 3395520 Country of ref document: EP Kind code of ref document: P |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1443570 Country of ref document: AT Kind code of ref document: T Effective date: 20211115 Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502017011940 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Ref document number: 3620282 Country of ref document: PT Date of ref document: 20220113 Kind code of ref document: T Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 20220106 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: FP |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2904805 Country of ref document: ES Kind code of ref document: T3 Effective date: 20220406 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220203 |
|
REG | Reference to a national code |
Ref country code: HU Ref legal event code: AG4A Ref document number: E057379 Country of ref document: HU |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220303 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220203 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502017011940 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20220804 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220425 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20230424 Year of fee payment: 7 Ref country code: HU Payment date: 20230419 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20230417 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211103 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20240418 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20240422 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PL Payment date: 20240322 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20240423 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240403 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20240501 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20240517 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20240417 Year of fee payment: 8 Ref country code: CZ Payment date: 20240416 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: RO Payment date: 20240419 Year of fee payment: 8 Ref country code: IT Payment date: 20240430 Year of fee payment: 8 Ref country code: FR Payment date: 20240419 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PT Payment date: 20240422 Year of fee payment: 8 |