CN113490707A - Foam sheet and adhesive tape - Google Patents
Foam sheet and adhesive tape Download PDFInfo
- Publication number
- CN113490707A CN113490707A CN202080016728.7A CN202080016728A CN113490707A CN 113490707 A CN113490707 A CN 113490707A CN 202080016728 A CN202080016728 A CN 202080016728A CN 113490707 A CN113490707 A CN 113490707A
- Authority
- CN
- China
- Prior art keywords
- foam sheet
- resin
- biomass
- mass
- polyolefin resin
- 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.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 151
- 239000002390 adhesive tape Substances 0.000 title description 7
- 239000002028 Biomass Substances 0.000 claims abstract description 56
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 49
- 229920013716 polyethylene resin Polymers 0.000 claims description 27
- 150000001875 compounds Chemical class 0.000 claims description 22
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 19
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 16
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000002685 polymerization catalyst Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 description 46
- 239000011347 resin Substances 0.000 description 46
- 210000004027 cell Anatomy 0.000 description 40
- 238000004132 cross linking Methods 0.000 description 19
- -1 polyethylene Polymers 0.000 description 18
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 17
- 239000005977 Ethylene Substances 0.000 description 17
- 238000005187 foaming Methods 0.000 description 17
- 239000004088 foaming agent Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 239000004743 Polypropylene Substances 0.000 description 8
- 239000000654 additive Substances 0.000 description 8
- 239000003963 antioxidant agent Substances 0.000 description 8
- 230000003078 antioxidant effect Effects 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 7
- 230000005865 ionizing radiation Effects 0.000 description 7
- 239000003446 ligand Substances 0.000 description 7
- 239000011342 resin composition Substances 0.000 description 7
- 238000005979 thermal decomposition reaction Methods 0.000 description 7
- 239000004711 α-olefin Substances 0.000 description 7
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 239000003208 petroleum Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 150000001336 alkenes Chemical class 0.000 description 5
- 210000003855 cell nucleus Anatomy 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- ZGEGCLOFRBLKSE-UHFFFAOYSA-N 1-Heptene Chemical compound CCCCCC=C ZGEGCLOFRBLKSE-UHFFFAOYSA-N 0.000 description 4
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 4
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 4
- 239000004156 Azodicarbonamide Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical class NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 4
- 235000019399 azodicarbonamide Nutrition 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229920000092 linear low density polyethylene Polymers 0.000 description 4
- 239000004707 linear low-density polyethylene Substances 0.000 description 4
- 150000001451 organic peroxides Chemical class 0.000 description 4
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052723 transition metal Inorganic materials 0.000 description 3
- 150000003624 transition metals Chemical class 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000007983 Tris buffer Substances 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 150000001923 cyclic compounds Chemical group 0.000 description 2
- QKIUAMUSENSFQQ-UHFFFAOYSA-N dimethylazanide Chemical compound C[N-]C QKIUAMUSENSFQQ-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- CPOFMOWDMVWCLF-UHFFFAOYSA-N methyl(oxo)alumane Chemical compound C[Al]=O CPOFMOWDMVWCLF-UHFFFAOYSA-N 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 150000002832 nitroso derivatives Chemical class 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- WRXCBRHBHGNNQA-UHFFFAOYSA-N (2,4-dichlorobenzoyl) 2,4-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1Cl WRXCBRHBHGNNQA-UHFFFAOYSA-N 0.000 description 1
- ULUZGMIUTMRARO-UHFFFAOYSA-N (carbamoylamino)urea Chemical compound NC(=O)NNC(N)=O ULUZGMIUTMRARO-UHFFFAOYSA-N 0.000 description 1
- USVVENVKYJZFMW-ONEGZZNKSA-N (e)-carboxyiminocarbamic acid Chemical compound OC(=O)\N=N\C(O)=O USVVENVKYJZFMW-ONEGZZNKSA-N 0.000 description 1
- WVGXBYVKFQJQGN-UHFFFAOYSA-N 1-tert-butylperoxy-2-propan-2-ylbenzene Chemical compound CC(C)C1=CC=CC=C1OOC(C)(C)C WVGXBYVKFQJQGN-UHFFFAOYSA-N 0.000 description 1
- ZFUIKMHIKJFJHF-UHFFFAOYSA-N 1-tert-butylperoxy-3,3,5-trimethylhexane Chemical compound CC(C)CC(C)(C)CCOOC(C)(C)C ZFUIKMHIKJFJHF-UHFFFAOYSA-N 0.000 description 1
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Chemical group C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- ODBCKCWTWALFKM-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhex-3-yne Chemical compound CC(C)(C)OOC(C)(C)C#CC(C)(C)OOC(C)(C)C ODBCKCWTWALFKM-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- JOLOSPPNXWGZBG-UHFFFAOYSA-N C[Ti]C1C=CC=C1 Chemical compound C[Ti]C1C=CC=C1 JOLOSPPNXWGZBG-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 235000014680 Saccharomyces cerevisiae Nutrition 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- CAMXVZOXBADHNJ-UHFFFAOYSA-N ammonium nitrite Chemical compound [NH4+].[O-]N=O CAMXVZOXBADHNJ-UHFFFAOYSA-N 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- BXIQXYOPGBXIEM-UHFFFAOYSA-N butyl 4,4-bis(tert-butylperoxy)pentanoate Chemical compound CCCCOC(=O)CCC(C)(OOC(C)(C)C)OOC(C)(C)C BXIQXYOPGBXIEM-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- SPTHWAJJMLCAQF-UHFFFAOYSA-M ctk4f8481 Chemical compound [O-]O.CC(C)C1=CC=CC=C1C(C)C SPTHWAJJMLCAQF-UHFFFAOYSA-M 0.000 description 1
- YQHLDYVWEZKEOX-UHFFFAOYSA-N cumene hydroperoxide Chemical compound OOC(C)(C)C1=CC=CC=C1 YQHLDYVWEZKEOX-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- JAGHDVYKBYUAFD-UHFFFAOYSA-L cyclopenta-1,3-diene;titanium(4+);dichloride Chemical compound [Cl-].[Cl-].[Ti+4].C1C=CC=[C-]1.C1C=CC=[C-]1 JAGHDVYKBYUAFD-UHFFFAOYSA-L 0.000 description 1
- SRKKQWSERFMTOX-UHFFFAOYSA-N cyclopentane;titanium Chemical compound [Ti].[CH]1C=CC=C1 SRKKQWSERFMTOX-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 235000018342 monosodium citrate Nutrition 0.000 description 1
- 239000002524 monosodium citrate Substances 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920005678 polyethylene based resin Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 150000003349 semicarbazides Chemical class 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- VPGLGRNSAYHXPY-UHFFFAOYSA-L zirconium(2+);dichloride Chemical compound Cl[Zr]Cl VPGLGRNSAYHXPY-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/02—Ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/26—Porous or cellular plastics
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2500/00—Characteristics or properties of obtained polyolefins; Use thereof
- C08F2500/12—Melt flow index or melt flow ratio
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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- Chemical & Material Sciences (AREA)
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- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Adhesive Tapes (AREA)
Abstract
The foam sheet is a foam sheet comprising a biomass-based polyolefin resin (A), wherein the biomass fraction in the foam sheet is 40 mass% or more, the thickness is 0.05 to 1.5mm, and the expansion ratio is 1.5 to 20 times.
Description
Technical Field
The present invention relates to a foam sheet containing a biomass-based polyolefin resin, and an adhesive tape provided with the foam sheet.
Background
Foam sheets obtained by foaming a resin are widely used in various fields such as buildings, electronic equipment, and vehicles. The resin used for the foam sheet is generally a resin derived from petroleum, but a large amount of carbon dioxide is discharged in the production process, disposal process, and the like, and thus the load on the environment becomes a problem. Therefore, in order to solve such problems, studies have been made on the use of natural resins.
For example, patent document 1 describes a foam having a biomass degree of 25% or more as measured by ASTM D6866 (made in 2004) using polyethylene (biomass-based polyethylene) containing a component derived from natural ethylene. Patent document 2 discloses a foam containing 20 to 100 mass% of a low-density polyethylene resin containing a natural ethylene component, having a biomass content of 25% or more and a gel fraction of 5 to 60% or less.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2013-155225
Patent document 2: japanese patent laid-open publication No. 2018-65898
Disclosure of Invention
Problems to be solved by the invention
In recent years, downsizing of electronic devices and high functionality of various parts have been advanced, and accompanying this, there has been a demand for a foam sheet for use in electronic devices to be thin and to improve various performances such as impact resistance and flexibility. On the other hand, there is a demand for a reduction in environmental load, and a foam sheet used for electronic equipment uses a biomass resin to reduce environmental load and to improve various performances such as impact resistance.
The present invention addresses the problem of providing a foam sheet that contains a biomass-based resin and has low environmental impact resistance and other various properties even when the thickness is reduced.
Means for solving the problems
As a result of intensive studies, the present inventors have found that the above problems can be solved by adjusting the biomass ratio in the foam sheet to 40 mass% or more, adjusting the thickness to 0.05 to 1.5mm, and adjusting the expansion ratio to 1.5 to 20 times, and have completed the following invention.
That is, the present invention relates to the following [1] to [12 ].
[1] A foam sheet comprising a biomass-based polyolefin resin (A), wherein the biomass content of the foam sheet is 40 mass% or more, the thickness is 0.05 to 1.5mm, and the expansion ratio is 1.5 to 20 times.
[2] The foam sheet according to the above [1], which further contains a polyolefin resin (B) other than the biomass-based polyolefin resin (A).
[3] The foam sheet according to the above [2], wherein the polyolefin resin (B) is 1 selected from the group consisting of a polyethylene resin and an ethylene-vinyl acetate copolymer.
[4] The foam sheet according to the above [2] or [3], wherein the polyethylene resin comprises a polyethylene resin polymerized by a metallocene compound polymerization catalyst.
[5] The foam sheet according to the above [3] or [4], wherein the polyethylene resin has a Melt Index (MI) of 1.0 to 12g/10 min or more.
[6] The foam sheet according to any one of the above [1] to [5], wherein the melt index of the biomass-based polyolefin resin (A) is 1.5 to 12g/10 min or more.
[7] The foam sheet according to any one of the above [1] to [6], wherein the average cell diameter in the MD direction and the average cell diameter in the TD direction are both 20 to 350 μm or less.
[8] The foam sheet according to any one of the above [1] to [7], wherein the ratio of the average cell diameter in the MD direction and the TD direction to the average cell diameter in the ZD direction is 1.8 to 9.
[9] The foam sheet according to any one of the above [1] to [8], wherein the maximum cell diameter in the foam sheet is 500 μm or less.
[10] The foam sheet according to any one of the above [1] to [9], which has a 25% compressive strength of 200kPa or less.
[11] The foam sheet according to any one of [1] to [10] above, which is used for an electronic device.
[12] An adhesive tape comprising the foam sheet according to any one of [1] to [11] and an adhesive material provided on one or both surfaces of the foam sheet.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, in a foam sheet containing a biomass resin and having a low environmental load, various performances such as impact resistance can be improved even when the thickness is made thin.
Detailed Description
[ foam sheet ]
The foam sheet of the present invention is a foam comprising at least a biomass-based polyolefin resin (A), wherein the biomass fraction in the foam sheet is 40 mass% or more, the thickness is 0.05 to 1.5mm, and the expansion ratio is 1.5 to 20 times.
In the present invention, the biomass fraction of the foam sheet is set to 40 mass% or more and the expansion ratio is adjusted to a specific range, whereby the environmental load is low and the maximum cell diameter can be made small while the cell ratio is set to a constant value or more even in a thin foam sheet. As a result, various performances required for the foam sheet such as impact resistance can be provided even in a thin foam sheet.
The present invention will be described in detail below.
[ Biomass-based polyolefin resin (A) ]
The foam sheet of the present invention is a foam containing at least a biomass-based polyolefin resin (a). The biomass-based polyolefin resin (a) used in the present invention is a polyolefin resin containing a naturally derived component, and specifically, a polyethylene-based resin containing naturally derived ethylene as a structural unit can be exemplified. More specifically, homopolymers of ethylene derived from natural sources and copolymers of ethylene derived from natural sources and olefins derived from petroleum are mentioned, and among these, copolymers of ethylene derived from natural sources and olefins derived from petroleum are preferable from the viewpoint of availability and the like. The petroleum-derived olefin is preferably 1 or more selected from the group consisting of ethylene, propylene, 1-butene and 1-hexene, and among these, ethylene is preferred. Further, the biomass-based polyolefin resin (a) may be an ethylene-vinyl acetate copolymer containing ethylene of natural origin as a structural unit.
The biomass-based polyolefin resin (A) may be used alone in 1 kind or in combination with 2 or more kinds.
The content of the structural unit derived from natural ethylene in the biomass-based polyolefin resin (a) is preferably 40 to 98 mass%, more preferably 75 to 97 mass%, and still more preferably 85 to 96 mass%. That is, the biomass ratio of the biomass-based polyolefin resin (a) is preferably 40 to 98% by mass, more preferably 75 to 97% by mass, and still more preferably 85 to 96% by mass.
When the content of the structural unit derived from natural ethylene is not less than the lower limit, the environmental load is reduced, and the effect of reducing carbon dioxide, for example, is also improved. On the other hand, if the content of the structural unit derived from natural ethylene is not more than the upper limit, the crystallization rate becomes small when a foamable resin sheet described later is obtained, and therefore, a foamable resin sheet having a uniform thickness in the width direction is easily obtained, and various physical properties are easily improved even if the foamable resin sheet is thinned.
The Melt Index (MI) of the biomass-based polyolefin resin (A) is preferably 1.5 to 12g/10 min or more. If the melt index is in the above range, the resin is soft and foaming proceeds appropriately. Therefore, the foam sheet has improved flexibility, and the maximum cell diameter can be reduced to improve the impact resistance, flexibility, and the like of the foam sheet. From these viewpoints, the melt index of the biomass-based polyolefin resin (A) is more preferably 2.0 to 10g/10 min, still more preferably 2.2 to 7.0g/10 min, and yet more preferably 2.4 to 5.0g/10 min.
In the present specification, the melt index can be measured at 190 ℃ under a 2.16kg load in accordance with ASTM D1238.
The density of the biomass-based polyolefin resin (A) is, for example, 0.900 to 0.940g/cm3Preferably 0.910 to 0.930g/cm3. When the density of the biomass-based polyolefin resin (A) is within the above range, various performances required as a foam, such as impact resistance and flexibility, can be easily improved.
The biomass-based polyolefin resin (a) can be produced by a known method using natural-source ethylene and, if necessary, petroleum-source olefin. Ethylene, which is a natural source of the biomass-based polyolefin resin (a), is obtained by, for example, fermenting sugar obtained from sugar cane, which is a natural raw material, with saccharomyces cerevisiae, which is a fermentation agent, to produce ethanol, and converting the ethanol into ethylene by a contact reaction at a temperature exceeding 300 ℃ using a catalyst such as γ -alumina.
[ resins other than the Biomass-based polyolefin resin (A) ]
The foam sheet may contain a resin other than the biomass-based polyolefin resin (a), and for example, preferably contains a polyolefin resin (B). The polyolefin resin (B) is generally a petroleum-based polyolefin resin produced from a petroleum-derived polyolefin. By using the polyolefin resin (B), the foam sheet can be made thin. Further, the compression strength, the maximum cell diameter, and the average cell diameter of the foam sheet can be easily adjusted to be within the ranges described below.
Examples of the polyolefin resin (B) include polyethylene resins, polypropylene resins, ethylene-vinyl acetate copolymers, ethylene-ethyl acrylate copolymers, and the like, and among them, at least 1 selected from polyethylene resins and ethylene-vinyl acetate copolymers is preferable, and polyethylene resins are more preferable. The polyolefin resin (B) may be used alone in 1 kind, or may be used in combination of 2 or more kinds.
Polyethylene resin
Examples of the polyethylene resin include those obtained by polymerization using a polymerization catalyst such as a ziegler-natta compound, a metallocene compound, or a chromium oxide compound, and those obtained by polymerization using a polymerization catalyst of a metallocene compound are preferably used. By using a polyethylene resin obtained by polymerization using a polymerization catalyst of a metallocene compound, crosslinking and the like described later can be made uniform, and various properties as a foam such as flexibility can be easily improved even when the foam is made thin. Further, it is easy to make the maximum bubble diameter small.
Further, the polyethylene resin preferably has a density of 0.930g/cm3The Low Density Polyethylene (LDPE) described below is more preferably a Linear Low Density Polyethylene (LLDPE). By using the linear low-density polyethylene, flexibility can be imparted to the foam sheet, and the foam sheet can be made thin. The linear low-density polyethylene is more preferably a linear low-density polyethylene obtained by copolymerizing ethylene (for example, 75% by mass or more, preferably 90% by mass or more based on the total monomer amount) with a small amount of an α -olefin as required.
Examples of the α -olefin include propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, and 1-octene. Among them, preferred is an alpha-olefin having 4 to 10 carbon atoms.
The polyethylene resin obtained by polymerization in the polymerization catalyst of the metallocene compound is preferably a linear low-density polyethylene, from the viewpoint of making the foam sheet thin and further improving flexibility.
The density of the polyethylene resin is preferably 0.870-0.930 g/cm3More preferably 0.890 to 0.925g/cm3More preferably 0.900 to 0.923g/cm3. As the polyethylene resin, a plurality of polyethylene resins may be used, and further, polyethylene resins other than the above density range may be added.
The polyethylene resin preferably has a melt index of 1.0 to 12g/10 min, more preferably 1.5 to 8g/10 min, and still more preferably 1.8 to 4.5g/10 min. If the melt index of the polyethylene resin is within the above range, foaming proceeds appropriately, the maximum cell diameter of the foam sheet is easily made small, and the processability and moldability of the foam sheet become good.
(metallocene compound)
Examples of the metallocene compound include compounds such as bis (cyclopentadienyl) metal complexes having a structure in which a transition metal is sandwiched between pi-electron-based unsaturated compounds. More specifically, there may be mentioned compounds in which 1 or 2 or more cyclopentadienyl rings or the like are present as ligands (ligands) in a tetravalent transition metal such as titanium, zirconium, nickel, palladium, hafnium, platinum and the like.
Such metallocene compounds have uniform properties of active sites, and each active site has the same degree of activity. Since the polymer synthesized using the metallocene compound has high uniformity in molecular weight, molecular weight distribution, composition distribution, and the like, when a sheet containing the polymer synthesized using the metallocene compound is crosslinked, the crosslinking proceeds uniformly. As a result, the foam sheet can be uniformly stretched, and therefore, the thickness of the foam sheet can be easily made uniform, and the foam sheet can be easily made thin.
Examples of the ligand include a cyclopentadienyl ring and an indenyl ring. These cyclic compounds may be substituted with hydrocarbyl, substituted hydrocarbyl or hydrocarbon-substituted metalloid radicals. Examples of the hydrocarbon group include methyl, ethyl, various propyl groups, various butyl groups, various pentyl groups, various hexyl groups, 2-ethylhexyl groups, various heptyl groups, various octyl groups, various nonyl groups, various decyl groups, various cetyl groups, and phenyl groups. The term "various" means various isomers including normal-, secondary-, tertiary-, and iso-isomers.
In addition, a substance obtained by polymerizing a cyclic compound into an oligomer can be used as a ligand.
Further, in addition to the pi-electron-based unsaturated compound, monovalent anion ligands such as chlorine and bromine, divalent anion chelate ligands, hydrocarbons, alkoxides, arylamides, aryl oxides, amides, arylamides, phosphides, arylphosphides, and the like can be used.
Examples of the metallocene compound containing a tetravalent transition metal and a ligand include cyclopentadienyl titanium tris (dimethylamide), methylcyclopentadienyl titanium tris (dimethylamide), bis (cyclopentadienyl) titanium dichloride, and dimethylsilyl tetramethylcyclopentadienyl-tert-butylamido zirconium dichloride.
The metallocene compound functions as a catalyst in the polymerization of various olefins by being combined with a specific cocatalyst (co-catalyst). Specific examples of the cocatalyst include Methylaluminoxane (MAO) and boron compounds. The proportion of the cocatalyst to the metallocene compound is preferably 10 to 100 ten thousand mol times, and more preferably 50 to 5,000 mol times.
Polypropylene resin
Examples of the polypropylene resin used as the polyolefin resin (B) include polypropylene, a propylene-ethylene copolymer containing 50 mass% or more of propylene, a propylene- α -olefin copolymer containing 50 mass% or more of propylene, and the like. These may be used alone in 1 kind, or may be used in combination of 2 or more kinds.
Specific examples of the α -olefin constituting the propylene- α -olefin copolymer include 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, and 1-octene, and among them, α -olefins having 6 to 12 carbon atoms are preferable.
The density of the polypropylene resin is preferably 0.870-0.930 g/cm3More preferably 0.890 to 0.925g/cm3More preferably 0.900 to 0.923g/cm3. As the polypropylene resin, a plurality of polypropylene resins may also be used, and further, polypropylene resins other than the above density range may be added.
Ethylene-vinyl acetate copolymer
The ethylene-vinyl acetate copolymer used as the polyolefin resin (B) includes, for example, an ethylene-vinyl acetate copolymer having a vinyl acetate content (VA amount) of preferably 5 to 40 mass%, more preferably 12 to 35 mass%, and still more preferably 15 to 30 mass%. When the vinyl acetate content in the ethylene-vinyl acetate copolymer is in the above range, the maximum cell diameter can be reduced, and a foam sheet having excellent flexibility can be obtained.
In the present invention, for example, 2 or more species different in molecular weight, amount of vinyl acetate in the copolymer component, melting point, and the like may be used in combination.
The ethylene-vinyl acetate copolymer used in the present invention may contain, in addition to ethylene and vinyl acetate, vinyl alcohol obtained by hydrolyzing a part of vinyl acetate.
Examples of the ethylene-vinyl acetate copolymer include "ウルトラセン" manufactured by imperial ソー, "エバフレックス" manufactured by mitsui デュポンポリケミカル, "UBE ポリエチレン" manufactured by yu pill ポリエチレン, and "サンテック" manufactured by asahi ケミカルズ.
The density of the ethylene-vinyl acetate copolymer is preferably 0.900 to 0.980g/cm3More preferably 0.910 to 0.975g/cm3More preferably 0.920 to 0.960g/cm3. As the ethylene-vinyl acetate copolymer, a plurality of ethylene-vinyl acetate copolymers may be used, and further, a copolymer of ethylene and vinyl acetate may be usedEthylene-vinyl acetate copolymers other than the density range described above are added.
The ethylene-vinyl acetate copolymer preferably has a melt index of 1.5 to 15g/10 min, more preferably 2.0 to 10g/10 min, and still more preferably 2.5 to 5g/10 min. When the melt index of the ethylene-vinyl acetate copolymer is within the above range, the maximum cell diameter of the foam sheet is easily made small, and the processability and moldability of the foam sheet become good.
[ contents of respective resins ]
From the viewpoint of reducing the load on the environment and improving the biomass ratio of the foam sheet, the content of the biomass-based polyolefin resin (a) in the foam sheet is preferably 42 mass% or more, more preferably 50 mass% or more, and even more preferably 60 mass% or more, based on the total amount of the resin components. In addition, in order to make the foam sheet thin and to facilitate the performance as a foam good, it is preferable to include a resin other than the biomass-based polyolefin resin (a). From such a viewpoint, the content of the biomass-based polyolefin resin (a) is preferably 95% by mass or less, more preferably 85% by mass or less, and still more preferably 75% by mass or less.
The content of the polyolefin resin (B) is preferably 5% by mass or more, more preferably 15% by mass or more, and further preferably 25% by mass or more, and is preferably 58% by mass or less, more preferably 50% by mass or less, and further preferably 40% by mass or less, based on the total amount of the resin components. When the content of the polyolefin resin (B) is not less than the lower limit, the sheet can be easily made thin, and various physical properties required for the foam sheet such as impact resistance, flexibility, and mechanical strength can be easily improved. Further, by setting the upper limit value to be equal to or less than the above, the environmental load is reduced, and the biomass ratio of the foam sheet is easily increased.
When the polyolefin resin (B) contains a polyethylene resin obtained by polymerization with a polymerization catalyst of a metallocene compound, the polyethylene resin is preferably used alone as the polyolefin resin (B), but may be used in combination with another polyolefin resin (B).
The content of the polyethylene resin obtained by polymerization with the metallocene compound polymerization catalyst is preferably 40 to 100% by mass, more preferably 50 to 100% by mass, and still more preferably 85 to 100% by mass, based on the total amount of the polyolefin resin (B). By increasing the content of the polyethylene resin obtained by polymerization in the metallocene compound polymerization catalyst, the foam sheet can be easily made good in flexibility and the like, and can be made uniform in crosslinking and the like, the sheet can be made thin, and the maximum cell diameter can be easily made small.
< biomass ratio in foam sheet >
The biomass fraction in the foam sheet of the present invention is 40 mass% or more. If the biomass ratio is made less than 40 mass%, the load on the environment cannot be reduced. From this viewpoint, the biomass ratio is preferably 50% by mass or more, and more preferably 60% by mass or more. The upper limit is not particularly limited, but is preferably 90 mass% or less, more preferably 82 mass% or less, further preferably 75 mass% or less, and further preferably 68 mass% or less, from the viewpoint of the strength, flexibility, production cost, and the like of the foam sheet.
The biomass ratio of the foam sheet can be obtained by multiplying the biomass ratio of the biomass-based polyolefin resin (a) by the content ratio of the biomass-based polyolefin resin (a) to the total foam sheet amount. The total foam sheet amount can be calculated by removing the amount of the blowing agent and the amount of the volatile component during production from the total resin composition. The biomass percentage of the biomass-based polyolefin resin (a) is a biomass degree measured by a measurement method defined in ASTM D6866.
< thickness of foam sheet >
The foam sheet of the present invention has a thickness of 0.05 to 1.5 mm. If the thickness is less than 0.05mm, the properties of the foam sheet, such as mechanical strength and impact resistance, cannot be sufficiently improved. Further, if the thickness is made larger than 1.5mm, the thickness becomes difficult to be reduced, and it is not suitable for use in miniaturized electronic equipment. From the viewpoint of reducing the thickness and sufficiently exhibiting the performance of the foam sheet, the thickness of the foam sheet is preferably 1.2mm or less, more preferably 0.9mm or less, further preferably 0.6mm or less, and further preferably 0.08mm or more, further preferably 0.10mm or more.
< expansion ratio >
The foam sheet of the present invention has a foaming ratio of 1.5 to 20 times. If the expansion ratio of the foam sheet is less than 1.5 times, the ratio of cells decreases, and the properties as a foam such as flexibility become insufficient. On the other hand, if the expansion ratio exceeds 20 times, the maximum cell diameter becomes large, and as a result, it becomes difficult to improve various performances of the foam sheet such as impact resistance. From these viewpoints, the expansion ratio of the foam sheet is preferably 1.8 to 15 times, and more preferably 2.5 to 10 times. The expansion ratio is a value calculated by measuring the specific volume (unit: cc/g) before and after expansion and calculating the specific volume after expansion/the specific volume before expansion.
< maximum bubble diameter and average bubble diameter >
The maximum cell diameter of the foam sheet of the present invention is preferably 500 μm or less. If the maximum cell diameter is not more than the upper limit, various properties of the foam sheet such as impact resistance can be improved even if the sheet is made thin. The maximum cell diameter of the foam sheet is more preferably 380 μm or less, and still more preferably 300 μm or less, from the viewpoint of sufficiently ensuring the impact resistance of the foam sheet. The maximum cell diameter of the foam sheet is preferably 50 μm or more, more preferably 80 μm or more, and still more preferably 100 μm or more.
The foam sheet of the present invention preferably has an average cell diameter of 20 to 350 μm or less in both the MD and TD directions. When the average cell diameter is in the above range, the maximum cell diameter is also decreased, and the 25% compressive strength can be brought into a desired range, and the impact resistance, impact absorbability and other properties can be improved. From these viewpoints, the average cell diameter in both the MD direction and the TD direction is preferably 30 to 250 μm, more preferably 50 to 200 μm, and still more preferably 60 to 140 μm.
Further, the foam sheet preferably has an average cell diameter in the ZD direction of 5 to 250 μm, more preferably 10 to 140 μm, even more preferably 15 to 100 μm, and even more preferably 20 to 60 μm, from the viewpoint of ensuring impact resistance, impact absorbability, and the like.
The average bubble diameter is a value measured by the following method.
A sample obtained by cutting a foam sheet into 50mm squares was prepared as a foam sheet sample for measurement. After being immersed in liquid nitrogen for 1 minute, the film was cut in the thickness direction by razor blades in the MD direction and the TD direction, respectively. A200-fold magnified photograph of the cross section thereof was taken using a digital microscope ("VHX-900" manufactured by キーエンス Co., Ltd.), the bubble diameters of all the bubbles present in the cross section at a length of 2mm in each of the MD direction and the TD direction were measured, and the operation was repeated 5 times. Further, the average value of all the cells is defined as the average cell diameter in the MD direction and the TD direction. The bubble diameters in the ZD direction were also measured for all the measured bubbles, and the average value thereof was set as the average bubble diameter in the ZD direction. Further, the maximum value among all the measured bubble diameters was defined as the maximum bubble diameter.
In the present invention, "MD" means a Machine Direction (Machine Direction) and means a Direction corresponding to the extrusion Direction of the foam sheet or the like. "TD" refers to a Transverse Direction (Transverse Direction) and to a Direction perpendicular to the MD and parallel to the foam sheet. Further, "ZD" means the Thickness Direction (Thickness Direction), which is a Direction perpendicular to both MD and TD.
< ratio of bubble diameter >
The ratio of the average bubble diameter in the MD direction and the TD direction to the average bubble diameter in the ZD direction (hereinafter, also referred to as "(MD + TD)/2 ZD") is preferably 1.3 to 10, more preferably 1.8 to 9, even more preferably 2 to 8, and even more preferably 2.5 to 6. The average cell diameter in the MD and TD is an average of the average cell diameter in the MD and the average cell diameter in the TD.
When (MD + TD)/2ZD is within the above range, bubbles having a shape extending in the MD direction and the TD direction are formed, and therefore, even if the sheet is thin, a foam sheet having excellent impact resistance, flexibility, impact absorbability and the like can be easily obtained. Further, (MD + TD)/2ZD can be adjusted by stretching at the time of production of the foam sheet while adjusting the expansion ratio to the above range.
(iii) compressive Strength of < 25 >
The 25% compressive strength of the foam sheet is, for example, 350kPa or less, but from the viewpoint of flexibility, is preferably 200kPa or less, more preferably 160kPa or less, and still more preferably 100kPa or less. In addition, from the viewpoint of satisfactory flexibility and satisfactory impact resistance, mechanical strength, and the like, the 25% compressive strength of the foam sheet is preferably 20kPa or more, more preferably 35kPa or more, and still more preferably 40kPa or more.
The 25% compressive strength can be adjusted by the type of resin, the cell diameter, the expansion ratio, and the like, and for example, if the expansion ratio is made high, the value of the 25% compressive strength can be made low.
The 25% compression strength is a value measured in accordance with JIS K6767 for the foam sheet.
< degree of crosslinking >
The foam sheet is preferably crosslinked. The degree of crosslinking of the foam sheet is preferably 15% by mass or more. When the crosslinking degree is not less than the lower limit, the average cell diameter can be easily adjusted to the above range, and the cells of the foam sheet can be easily miniaturized. Further, since variations in the size of each bubble are reduced, the maximum bubble diameter is reduced, and the impact resistance and the mechanical strength are easily improved. From such a viewpoint, the degree of crosslinking of the foam sheet is more preferably 25% by mass or more, and still more preferably 30% by mass or more. In addition, the crosslinking degree is preferably 65 mass% or less, more preferably 60 mass% or less, and even more preferably 55 mass% or less, from the viewpoint of improving the flexibility, impact resistance, impact absorbability, and the like of the foam sheet.
The foam sheet is obtained by foaming a resin composition containing the resin and a foaming agent. In addition, since an additive may be further compounded in the foam sheet, the foam sheet may be formed by foaming a resin composition containing the additive in addition to the resin and the foaming agent.
[ foaming agent ]
The foaming agent is preferably a thermal decomposition type foaming agent. Specific examples of the thermal decomposition type foaming agent include organic or inorganic chemical foaming agents having a decomposition temperature of about 140 to 270 ℃.
Examples of the organic foaming agent include azodicarbonamide, metal salts of azodicarboxylic acid (e.g., barium azodicarboxylate), azo compounds such as azobisisobutyronitrile, nitroso compounds such as N, N '-dinitrosopentamethylenetetramine, hydrazine derivatives such as biurea, 4' -oxybis (benzenesulfonylhydrazide) and toluenesulfonylhydrazide, and semicarbazide compounds such as toluenesulfonylsemicarbazide.
Examples of the inorganic foaming agent include ammonium carbonate, sodium carbonate, ammonium hydrogen carbonate, sodium hydrogen carbonate, ammonium nitrite, sodium borohydride, monosodium citrate anhydride, and the like.
Among them, from the viewpoint of obtaining fine bubbles and from the viewpoint of economy and safety, azo compounds and nitroso compounds are preferable, azodicarbonamide, azobisisobutyronitrile, N' -dinitrosopentamethylenetetramine are more preferable, and azodicarbonamide is particularly preferable. These thermal decomposition type foaming agent can be used alone or in combination of 2 or more.
The amount of the thermal decomposition type foaming agent is preferably 1 to 30 parts by mass per 100 parts by mass of the resin component. By using such a blending amount, the sheet can be appropriately foamed without breaking the bubbles. Further, if the amount of the thermal decomposition type foaming agent is increased, the expansion ratio is increased, and the flexibility can be improved. Therefore, the amount of the thermal decomposition type foaming agent is more preferably 3 to 25 parts by mass, and still more preferably 5 to 18 parts by mass.
[ additives ]
In the foam sheet, a cell nucleus regulator is preferably compounded as an additive. Examples of the cell nucleus regulator include zinc compounds such as zinc oxide and zinc stearate, and organic compounds such as citric acid and urea. Among them, zinc oxide and zinc stearate are more preferable, and either one or both of them may be used. By using a cell nucleus modifier in addition to the blowing agent, the average cell diameter and the variation in cell diameter can be easily reduced.
The amount of the cell nucleus modifier is preferably 0.1 to 8 parts by mass, more preferably 0.2 to 5 parts by mass, and still more preferably 0.3 to 2.5 parts by mass, per 100 parts by mass of the resin component.
In the foam sheet, an antioxidant may be compounded as an additive. Examples of the antioxidant include a phosphorus antioxidant, a phenol antioxidant, a sulfur antioxidant, and an amine antioxidant. The antioxidant is blended, for example, in an amount of 0.01 to 5 parts by mass per 100 parts by mass of the resin component.
In addition, in the foam sheet, a coloring agent may be compounded as an additive. The colorant is blended as a substance for adjusting the color of the foam sheet. Specific examples of the colorant include pigments and dyes. The colorant is blended, for example, in an amount of 0.5 to 5 parts by mass per 100 parts by mass of the resin component.
In addition to the above, additives generally used in foam sheet such as a heat stabilizer, a flame retardant, an antistatic agent, and a filler may be added to the foam sheet as required.
< method for producing foam sheet >
The foam sheet is preferably produced by the following method: a resin composition obtained by compounding and kneading a resin, a foaming agent, and, if necessary, other additives is molded into a sheet form to prepare a foamable resin sheet, and then the sheet is crosslinked by ionizing radiation or the like and then heated in a heating device such as a heating furnace or an oven to be foamed.
The resin sheet can be obtained by continuously extruding a resin composition obtained by kneading various components using a kneader such as a banbury mixer or a pressure kneader by an extruder, a calender, a belt casting, or the like.
Examples of the method of crosslinking the foamable resin sheet include crosslinking with ionizing radiation and crosslinking with an organic peroxide, but crosslinking with ionizing radiation is preferred.
When the crosslinking is performed by ionizing radiation, examples of the ionizing radiation include ultraviolet light, γ rays, and electron beams. The dose of ionizing radiation is preferably 0.5 to 10Mrad, more preferably 1.5 to 8 Mrad. When the crosslinking is performed by ionizing radiation, a foam sheet having a small diameter and a uniform bubble diameter can be obtained.
In the case of crosslinking by an organic peroxide, examples of the organic peroxide include diisopropylbenzene hydroperoxide, 2, 4-dichlorobenzoyl peroxide, benzoyl peroxide, t-butyl perbenzoate, cumyl hydroperoxide, t-butyl hydroperoxide, 1-di (t-butylperoxy) -3,3, 5-trimethylhexane, n-butyl-4, 4-di (t-butylperoxy) valerate, α' -bis (t-butylperoxyisopropyl) benzene, 2, 5-dimethyl-2, 5-di (t-butylperoxy) hexyne-3, t-butylperoxycumene and the like.
The amount of the organic peroxide is preferably 0.05 to 10 parts by mass, more preferably 0.1 to 7 parts by mass, per 100 parts by mass of the resin component.
Examples of the method of foaming the foamable resin sheet include a batch method such as an oven, and a continuous foaming method in which a foamable resin sheet is formed into a long sheet and continuously passed through a heating oven. The heating temperature is preferably 200 to 320 ℃, and more preferably 250 to 300 ℃.
The foamable resin sheet can be stretched in at least one of the MD direction and the TD direction, preferably, both directions thereof at the time of foaming. By stretching in the MD direction and the TD direction, the average cell diameter and the ratio of the average cell diameter can be easily adjusted to fall within the above range. Further, the foamable resin sheet may be stretched in at least one of the MD direction and the TD direction, preferably both of them, after foaming. In the case of stretching the foamable resin sheet after foaming, the stretching may be continued without cooling after foaming while maintaining the molten state at the time of foaming, or may be performed after cooling and reheating to form a molten or softened state.
< use >)
The foam sheet of the present invention is suitably used for electronic equipment. That is, the foam sheet of the present invention is suitably used in, for example, a mobile phone such as a smartphone, an electronic device such as a camera, a game device, an electronic account, a tablet terminal, and a notebook personal computer, and preferably in a mobile phone such as a smartphone. The foam sheet is used as, for example, a sealing material or an impact absorbing material in an electronic device.
[ adhesive tape ]
The foam sheet of the present invention can be used for an adhesive tape having the foam sheet as a base material. The pressure-sensitive adhesive tape includes, for example, a foam sheet and a pressure-sensitive adhesive material provided on at least one surface of the foam sheet. The adhesive tape can be adhered to other members via an adhesive material. The pressure-sensitive adhesive tape may have a pressure-sensitive adhesive material on both surfaces of the foam sheet, or may have a pressure-sensitive adhesive material on one surface.
The pressure-sensitive adhesive material may be a single pressure-sensitive adhesive layer laminated on the surface of the foam sheet or a double-sided pressure-sensitive adhesive sheet adhered to the surface of the foam sheet, and is preferably a single pressure-sensitive adhesive layer. The double-sided adhesive sheet further includes a substrate and adhesive layers provided on both sides of the substrate. A double-sided pressure-sensitive adhesive sheet is used to bond one pressure-sensitive adhesive layer to a foam sheet and to bond the other pressure-sensitive adhesive layer to another member.
The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited, and for example, an acrylic pressure-sensitive adhesive, a urethane pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, or the like can be used. Further, a release sheet such as release paper may be further bonded to the adhesive material.
The thickness of the adhesive material is preferably 5 to 200 μm, more preferably 7 to 150 μm, and further preferably 10 to 100 μm.
Examples
The present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples.
[ example 1]
Biomass resin (1) and polyethylene resin (1), azodicarbonamide as a thermal decomposition type foaming agent, zinc stearate and zinc oxide as a cell nucleus regulator, an antioxidant, and a black pigment were supplied to an extruder at compounding amounts shown in table 2, and were melt-kneaded at 130 ℃. The resin composition was extruded to obtain a long foam resin sheet.
Next, both surfaces of the long foam resin sheet were irradiated with 4.5Mrad of electron beam having an acceleration voltage of 500kV to crosslink the resin sheet. The crosslinked foamable resin sheet was continuously fed into a foaming furnace maintained at 250 ℃ by hot air and an infrared heater, and foamed while being stretched in the MD direction and the TD direction, to obtain a foam sheet having a thickness as shown in table 1.
Examples 2 to 17 and comparative examples 1 to 2
Resin compositions were obtained in the same manner as in example 1, except that the components to be supplied to the extruder were adjusted as shown in table 2. Then, the procedure was carried out in the same manner as in example 1, except that the irradiation amount of the electron beam was adjusted so that the degree of crosslinking was as shown in table 2, and the degree of stretching was adjusted so that (MD + TD)/2ZD was as shown in table 2.
The foam sheets obtained in examples and comparative examples were evaluated in the following manner.
< degree of crosslinking >
A test piece of about 100mg was sampled from the foam sheet, and the weight A (mg) of the test piece was precisely measured. Next, the test piece was subjected to 30cm xylene at 120 ℃ C3After being left for 24 hours, the resultant was filtered through a 200-mesh wire gauze to collect insoluble matter on the wire gauze, which was then vacuum-dried, and the weight B (mg) of the insoluble matter was precisely measured. From the obtained values, the degree of crosslinking (% by mass) was calculated by the following formula.
Degree of crosslinking (% by mass) — (B/a) × 100
< expansion ratio >
The specific volumes (unit: cc/g) before and after foaming were measured and calculated from the specific volume after foaming/the specific volume before foaming.
< biomass ratio in foam sheet >
Calculated by the method described in the specification.
< average bubble diameter and maximum bubble diameter >
The average cell diameter and the maximum cell diameter of the foam sheet are measured by the methods described in the specification.
(iii) compressive Strength of < 25 >
The foam sheet was measured for 25% compression strength in accordance with JIS K6767.
[ Table 1]
[ Table 2]
From the results in table 2, it is understood that the foam sheet of each example has a high biomass ratio, and even when the thickness is small, the maximum cell diameter can be made small, and various performances such as impact resistance can be improved.
Claims (12)
1. A foam sheet comprising a biomass-based polyolefin resin (A), wherein the biomass content of the foam sheet is 40 mass% or more, the thickness is 0.05 to 1.5mm, and the expansion ratio is 1.5 to 20 times.
2. The foam sheet according to claim 1, further comprising a polyolefin resin (B) other than the biomass-based polyolefin resin (A).
3. The foam sheet according to claim 2, the polyolefin resin (B) being 1 selected from a polyethylene resin and an ethylene-vinyl acetate copolymer.
4. The foam sheet according to claim 3, wherein the polyethylene resin comprises a polyethylene resin polymerized by a metallocene compound polymerization catalyst.
5. The foam sheet according to claim 3 or 4, wherein the polyethylene resin has a melt index MI of 1.0 to 12g/10 min or more.
6. The foam sheet according to any one of claims 1 to 5, wherein the biomass-based polyolefin resin (A) has a melt index of 1.5 to 12g/10 min or more.
7. The foam sheet according to any one of claims 1 to 6, wherein the average cell diameter in the MD direction and the average cell diameter in the TD direction are both 20 to 350 μm or less.
8. The foam sheet according to any one of claims 1 to 7, wherein the ratio of the average cell diameter in the MD direction and the TD direction to the average cell diameter in the ZD direction is 1.8 to 9.
9. The foam sheet according to any one of claims 1 to 8, wherein the maximum cell diameter in the foam sheet is 500 μm or less.
10. The foam sheet according to any one of claims 1 to 9, which has a 25% compressive strength of 200kPa or less.
11. The foam sheet according to any one of claims 1 to 10, which is used for an electronic device.
12. A pressure-sensitive adhesive tape comprising the foam sheet according to any one of claims 1 to 11 and a pressure-sensitive adhesive material provided on one or both surfaces of the foam sheet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-035550 | 2019-02-28 | ||
| JP2019035550 | 2019-02-28 | ||
| PCT/JP2020/008518 WO2020175699A1 (en) | 2019-02-28 | 2020-02-28 | Foam sheet and adhesive tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113490707A true CN113490707A (en) | 2021-10-08 |
Family
ID=72239822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080016728.7A Pending CN113490707A (en) | 2019-02-28 | 2020-02-28 | Foam sheet and adhesive tape |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2020175699A1 (en) |
| KR (1) | KR20210135228A (en) |
| CN (1) | CN113490707A (en) |
| WO (1) | WO2020175699A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1596279A (en) * | 2001-11-29 | 2005-03-16 | 东丽株式会社 | Crosslinked biodegradable resin continuous foamed sheet and method for production thereof |
| JP2013060528A (en) * | 2011-09-13 | 2013-04-04 | Sekisui Plastics Co Ltd | Polyethylene-based resin foamed sheet, expanded molding, and method for producing polyethylene-based resin foamed sheet |
| JP2018065898A (en) * | 2016-10-18 | 2018-04-26 | 東レ株式会社 | Foamed body |
| WO2018181486A1 (en) * | 2017-03-30 | 2018-10-04 | 積水化学工業株式会社 | Resin foam sheet, method for producing resin foam sheet, and adhesive tape |
| CN108713037A (en) * | 2016-09-30 | 2018-10-26 | 积水化学工业株式会社 | Independent air bubble foamed resin and its manufacturing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5919841B2 (en) | 2012-01-27 | 2016-05-18 | 東レ株式会社 | Foam |
-
2020
- 2020-02-28 CN CN202080016728.7A patent/CN113490707A/en active Pending
- 2020-02-28 JP JP2020516486A patent/JPWO2020175699A1/en active Pending
- 2020-02-28 WO PCT/JP2020/008518 patent/WO2020175699A1/en active Application Filing
- 2020-02-28 KR KR1020217026915A patent/KR20210135228A/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1596279A (en) * | 2001-11-29 | 2005-03-16 | 东丽株式会社 | Crosslinked biodegradable resin continuous foamed sheet and method for production thereof |
| JP2013060528A (en) * | 2011-09-13 | 2013-04-04 | Sekisui Plastics Co Ltd | Polyethylene-based resin foamed sheet, expanded molding, and method for producing polyethylene-based resin foamed sheet |
| CN108713037A (en) * | 2016-09-30 | 2018-10-26 | 积水化学工业株式会社 | Independent air bubble foamed resin and its manufacturing method |
| JP2018065898A (en) * | 2016-10-18 | 2018-04-26 | 東レ株式会社 | Foamed body |
| WO2018181486A1 (en) * | 2017-03-30 | 2018-10-04 | 積水化学工業株式会社 | Resin foam sheet, method for producing resin foam sheet, and adhesive tape |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20210135228A (en) | 2021-11-12 |
| JPWO2020175699A1 (en) | 2021-12-23 |
| WO2020175699A1 (en) | 2020-09-03 |
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Application publication date: 20211008 |