CN1522940A - Container soleplate made of Russian wood and producing method thereof - Google Patents
Container soleplate made of Russian wood and producing method thereof Download PDFInfo
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- CN1522940A CN1522940A CNA031576494A CN03157649A CN1522940A CN 1522940 A CN1522940 A CN 1522940A CN A031576494 A CNA031576494 A CN A031576494A CN 03157649 A CN03157649 A CN 03157649A CN 1522940 A CN1522940 A CN 1522940A
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- veneer
- bottom board
- container bottom
- board according
- sheet
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- 239000002023 wood Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title description 9
- 239000003292 glue Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 238000007731 hot pressing Methods 0.000 claims abstract description 18
- 241001536358 Fraxinus Species 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 235000018185 Betula X alpestris Nutrition 0.000 claims description 19
- 235000018212 Betula X uliginosa Nutrition 0.000 claims description 19
- 240000007313 Tilia cordata Species 0.000 claims description 16
- 241000218653 Larix laricina Species 0.000 claims description 13
- 235000008119 Larix laricina Nutrition 0.000 claims description 13
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical group [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 229910052627 muscovite Inorganic materials 0.000 claims description 10
- 230000003373 anti-fouling effect Effects 0.000 claims description 8
- -1 phenolic aldehyde Chemical class 0.000 claims description 6
- 241001106462 Ulmus Species 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 4
- 241000218652 Larix Species 0.000 abstract description 2
- 235000005590 Larix decidua Nutrition 0.000 abstract description 2
- 230000032683 aging Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 239000004744 fabric Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 241000473944 Hylaea <moth> Species 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Abstract
The present invention relates to a polywood which can be used as bottom plate of container and its production method. The described polywood includes wood surface-layer single plate, long-core single plate, short core single plate and bottom layer single plate. These signal plates are superimposed and hot-pressed so as to obtain the invented polywood. The described wood single plate is selected from one of Russian brichwood, larch, oak wood, ashtree, sathinwood and elm wood. The described production method includes the steps of cutting, drying, preparing glue and applying glue, assembling blank, prepressing, ageing and hot-pressing etc.
Description
Technical field
The present invention relates to a kind of veneer sheet and production method thereof as container bottom board, specifically relate to a kind of veneer sheet and production technology thereof that adopts Muscovite timber manufacturing as container bottom board, described Russian timber such as birch, tamarack, toothed oak wood, ashtree, linden, elm.
Background technology
The timber apron that freight container is used is different from common veneer sheet, and MOR, modulus of elasticity, bonding strength, presentation quality, working accuracy etc. all have very high technical requirements in length and breadth for they.The container bottom board in the world over more than 20 year almost all relies on the thick veneer sheet that the high density rigid broad-leaved wood of growing in the hylaea makes and makes base plate.High density rigid broad-leaved growth cycle is long, because long-term excessive felling, the hylaea resource faces exhaustion, in order to preserve the ecological environment, and satisfies the demand of growing modern transportation industry to container bottom board.The container bottom board material of exploitation new material is the task of top priority.
For a long time, people think to have only highdensity timber can produce the veneer sheet that meets the container bottom board requirement always, be subjected to the constraint of this mindset, the timber of intermediate density such as birch, tamarack, toothed oak wood, ashtree etc. all are considered to be used for the material of container bottom board.China neighbour's Russia country, its forest reserves are abundant, especially abound with timber such as birch, tamarack, toothed oak wood, ashtree, linden, elm.Russia is located in the frigid zone, and the arboreal growth cycle is long, and material is good.Though be the timber of same seeds such as birch, tamarack, toothed oak wood, its physical performance index such as density, MOR etc. all are far superior to the seeds of the same race of torrid areas.Show that about Russian forest resource exploration data Muscovite timber reserves is 750 billion cubic meters by forestry bureau of the Russian Federation, material is good, beautiful texture, cheap.
Summary of the invention
One of purpose of the present invention provides a kind of material of later-model container bottom board, and the veneer sheet that adopts Russian timber to make is used as container bottom board.It is abundant that the container bottom board that this Russian timber matter constitutes has the wood raw material source, the good and advantage of low manufacturing cost of material.Thereby substitute the tropical hard wood resource that ecological resources lack, the purpose of reach cost-cutting, preserving the ecological environment.
Two of purpose of the present invention provides that a kind of to adopt Russian timber be that raw material is produced the method for freight container with veneer sheet.The international industrial standard that adopts freight container that this method production and processing goes out to meet the wooden base plate of freight container with the quality and the performance of veneer sheet.
To achieve these goals, first technical scheme of the present invention's solution is:
A kind of veneer sheet as container bottom board, comprise wooden face ply, long core veneer, short core veneer and bottom veneer, through overlapping back hot pressing forms to these multilayer Wooden veneers, it is characterized in that described Wooden veneer is by at least a composition that is selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, the elm timber;
Described Wooden veneer is made up of two or more the timber that is selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, the elm veneer;
Wherein, Pictest layer veneer downside reaches by two long core veneers of each continuous arrangement of bottom veneer top at least; All the other long core veneers and the alternate criss-cross arrangement of short core veneer;
All veneer thicknesses are all 1.2～2.5 millimeters, preferred 1.5～1.6 millimeters;
The water ratio of long core veneer and short core veneer is 6～10%, preferred 8%; The water ratio of face ply and bottom veneer is 10～15%, preferred 10%.
Described multilayer veneer through assembly, cloth glue, display, veneer sheet thickness that hot pressing etc. processes is 25～41 millimeters, preferred 28 millimeters.
Total number of plies of the described container bottom board that is made of the wooden face ply of Russia, long core veneer, short core veneer and bottom veneer is 17～29 layers, preferred 19 layers, 21 layers.
Second technical scheme that the present invention solves is: a kind of production method as glued board for underplate of container comprises the steps:
A, log is cut into the veneer that thickness is all 1.2～2.5 millimeters, and the water ratio that is dried to long core veneer and short core veneer is 6～10%, preferred water ratio is 8%; The water ratio of face ply and bottom veneer is 10～15%, and preferred water ratio is 10%.
B, water ratio is met the requirements of the glue that even level veneer double spread in the veneer contains an amount of anti fouling composition;
C, according to the size of the veneer sheet that will produce, the veneer of cementing not and the veneer that has been coated with glue are stacked alternately to predetermined thickness, and the formation blank flat of at room temperature colding pressing, pressure is not more than the pressure that will carry out hot pressing;
D, will display through the blank flat of precompressed, the time is 120-240 minute;
E, under 135-145 ℃ temperature, to carrying out two sectional type hot pressing, first section through the blank flat colding pressing, display: the pressure that applies 1.4-1.8Mpa pressure carries out hot pressing, continues hot pressing 20-35 minute, second section pressure is 0.3-0.5Mpa, time 10-20 minute.
Among the present invention, described log can be formed by being selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, at least a of elm; Preferred described glue is phenolic aldehyde glue; First section pressure that described multilayer veneer is exerted pressure is preferably 1.4-1.6MPA, and the time length of exerting pressure is 25-30 minute; Second section pressure when exerting pressure is preferably 0.3-0.4Mpa, and time 10-15 minute, the temperature when exerting pressure was 135-140 ℃.
Among the present invention, described log also can be made up of two or more the timber that is selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, elm.
The double spread amount of described phenolic aldehyde glue is a 350-420 gram/sq m.
The anti fouling composition that described gluing step adopts is 4-bromo-2-(right-chlorphenyl)-1-(ethoxymethyl)-5-(trifluoromethyl) pyrroles-3-nitrile, and the amount that contains anti fouling composition accounts for the 4-5% of described glue quantity.
Preferred 1.5～1.6 millimeters of described veneer thickness.
Described veneer sheet thickness is 25～41 millimeters, preferred 28 millimeters.
The total number of plies of described veneer is 17～29 layers, preferred 19 layers, 21 layers.
Adopt aforesaid composite board for bottom board of container of the present invention and production method thereof, because breaking conventional conception adopts the abundant Russian timber in wood raw material source; have that material is good, production technology is simple; low cost of manufacture, properties of product are stable, help advantages such as ecological environmental protection.The composite board for bottom board of container that utilizes the present invention to produce satisfies trans-container lessor association 2002.9 technology bulletin (being called for short IICL2002.9 technology bulletin), and about the technical clause of container floor, testing result is as follows:
1) the small-sized flawless specimen test of WAS container bottom board: 〉=7.5KN (IICL2002.9 technology bulletin requires 〉=6.9KN); IICL2002.9 technology bulletin
2) shear test: 〉=3.42MPA (requirement of IICL2002.9 technology bulletin 〉=3.4MPA);
3) circulation boiling test: qualification rate 〉=95% (IICL2002.9 technology bulletin requires qualification rate 〉=90%).
Below in conjunction with example the present invention is elaborated.
Description of drawings
Fig. 1 is the embodiment of the invention 1 scheme drawing;
Fig. 2 is the embodiment of the invention 2 scheme drawings.
The specific embodiment
Embodiment 1
As shown in Figure 1, a kind of composite board for bottom board of container by the Russian birch of 19 layer of 1.60 millimeters thick, linden veneer through assembly, cloth glue, display, hot pressing etc. processes.The veneer sheet thickness that is processed into is 28 millimeters, among Fig. 11,2 is Russian linden veneer, 3,5 etc. is 10 long core veneers of vertically arranging of Russian birch, wherein, Pictest layer veneer downside reaches by two of each continuous arrangements of bottom veneer top, all the other long core veneers and 7 transversely arranged Russian birch weak point core veneer 4 alternate being staggered.Its production stage is as follows:
1, log is sawed-off: Russian birch, linden are pressed the sawed-off one-tenth juggle of desired size;
2, rounding: it is 1.60 millimeters veneer that juggle is peeled into thickness;
3, drying: the veneer after the rotary-cut is carried out drying with drying equipment, and dried each veneer water ratio is as follows: long core veneer, short core veneer water ratio are 8%, and the water ratio of face ply and bottom veneer is 10%;
4, veneer is sheared: dried veneer is pressed required size shear;
5, impregnation and gluing: cloth glue adopts phenolic aldehyde glue, adds the anti fouling composition that contains 4-bromo-2-(right-chlorphenyl)-1-(ethoxymethyl)-5-(trifluoromethyl) pyrroles-3-nitrile in right amount in glue, the two-sided cloth glue of dual numbers veneer, and cloth glue amount is 350 gram/sq ms;
6, assembly: the table base plate is Russian linden veneer, Pictest layer veneer downside reaches by two long core veneers of Russian birch of each continuous arrangement of bottom veneer top, all the other 6 vertical long core veneers of arranging of Russian birch and 7 transversely arranged alternate being staggered of the short core veneer of Russian birch;
7, precompressed: preload pressure is 1.2MPA, and the time is 30 minutes;
8, the face base plate is repaired: suitably repair according to the panel damage situations;
9, display: will display assembly time 130 minutes through the blank flat of precompressed;
10, hot pressing: to carrying out two sectional type hot pressing through the cold pressed blank flat, hot pressing temperature is 135 ℃, and first section pressure is 1.4MPA, and the time is 40 minutes, and second section pressure is 0.5MPA, and the time is 15 minutes; Its veneer bulk compressibility is 10.6%
11, cutting edge: with cooled blank flat cutting edge;
12, sanding, repairing: carry out sand according to the panel situation and cut and repair;
13, chamfering, grade: according to the chassis of container structure, process suitable book size, mortise, the groove that falls get product.
19 layers of container bottom board that Russian timber of the present invention and production technology are produced, physical property is as follows:
Bending strength: 7.5KN, shearing strength value: 3.42MPA, the circulation small piece of land surrounded by water stand the test rate of boiling: 96%
Embodiment 2
As shown in Figure 2, a kind of composite board for bottom board of container by the Russian linden of 21 layer of 1.50 millimeters thick, toothed oak wood, tamarack veneer through assembly, cloth glue, display, hot pressing etc. processes, procedure of processing is with embodiment 1, the veneer sheet thickness that is processed into is 28 millimeters, among Fig. 26,7 is Russian linden veneer, 8,10 etc. is 10 long core veneers of vertically arranging of Russian toothed oak wood, wherein, Pictest layer veneer downside reaches by two of each continuous arrangements of bottom veneer top, all the other long core veneers and 7 transversely arranged Russian Larch weak point core veneer 9 alternate being staggered.All veneer thicknesses are all 1.50 millimeters; The water ratio of long core veneer and short core veneer is 8%, and the water ratio of face ply and bottom veneer is 12%.Cloth glue adopts phenolic aldehyde glue, adds the anti fouling composition that contains 4-bromo-2-(right-chlorphenyl)-1-(ethoxymethyl)-5-(trifluoromethyl) pyrroles-3-nitrile in right amount in glue.The two-sided cloth glue of even number veneer, cloth glue amount is 350 gram/sq ms; Preload pressure is 1.4MPA, 35 minutes; Displayed 160 minutes; Hot pressing temperature is 140 ℃, and first section pressure is 1.5MPA, and the time is 40 minutes, and second section pressure is 0.4MPA, and the time is 13 minutes; Its veneer bulk compressibility is 10.6%; According to the chassis of container structure, process suitable book size, mortise, the groove that falls get product.
21 layers of container bottom board that Russian timber of the present invention and production technology are produced, physical property is as follows:
Bending strength: 7.6KN, shearing strength value: 3.40MPA, circulation boiling test qualification rate: 97%.
Claims (19)
1, a kind of veneer sheet as container bottom board, comprise wooden face ply, long core veneer, short core veneer and bottom veneer, through overlapping back hot pressing forms to these multilayer Wooden veneers, it is characterized in that described Wooden veneer is by at least a composition that is selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, the elm timber.
2, the veneer sheet as container bottom board according to claim 1 is characterized in that, described Wooden veneer is made up of two or more the timber that is selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, the elm veneer.
3, the veneer sheet as container bottom board according to claim 1 and 2 is characterized in that, each arranges two-layer at least long core veneer continuously described face ply downside and bottom veneer upside, all the other long core veneers and alternate being staggered of short core veneer.
4, the veneer sheet as container bottom board according to claim 3 is characterized in that, the water ratio of described long core veneer and short core veneer is 6～10%, and the water ratio of described face ply and bottom veneer is 10～15%.
5, the veneer sheet as container bottom board according to claim 4 is characterized in that, the water ratio of described long core veneer and short core veneer is 8%, and the water ratio of described face ply and bottom veneer is 10%.
6, the veneer sheet as container bottom board according to claim 1 and 2 is characterized in that, the described total number of plies that is made of face ply, long core veneer, short core veneer and bottom veneer is 17～29 layers.
7, the veneer sheet as container bottom board according to claim 1 and 2 is characterized in that described veneer thickness is all 1.2～2.5 millimeters.
8, the veneer sheet as container bottom board according to claim 7 is characterized in that described veneer thickness is 1.5～1.6 millimeters.
9, the veneer sheet as container bottom board according to claim 1 and 2 is characterized in that described veneer sheet thickness is 25～41 millimeters.
10, the veneer sheet as container bottom board according to claim 9 is characterized in that described veneer sheet thickness is 28 millimeters.
11, the veneer sheet as container bottom board according to claim 1 and 2 is characterized in that the bending strength F of described veneer sheet 〉=7.5KN, shearing strength value 〉=3.42MPA.
12, the described production method as glued board for underplate of container of a kind of claim 1～11 comprises the steps:
A, log is cut into the veneer that thickness is all 1.2～2.5 millimeters, and the water ratio that is dried to long core veneer and short core veneer is 6～10%; The water ratio of face ply and bottom veneer is 10～15%;
B, water ratio is met the requirements of the glue that even level veneer double spread in the veneer contains an amount of anti fouling composition;
C, according to the size of the veneer sheet that will produce, the veneer of cementing not and the veneer that has been coated with glue are stacked alternately to predetermined thickness, and the formation blank flat of at room temperature colding pressing, pressure is not more than the pressure that will carry out hot pressing;
D, will display through the blank flat of precompressed, the time is 120-240 minute;
E, under 135-145 ℃ temperature, to carrying out two sectional type hot pressing, first section through the blank flat colding pressing, display: the pressure that applies 1.4-1.8Mpa pressure carries out hot pressing, continues hot pressing 20-35 minute, second section pressure is 0.3-0.5Mpa, time 10-20 minute.
13, the production method of the veneer sheet as container bottom board according to claim 12 is characterized in that, described log can be formed by being selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, at least a of elm.
14, the production method that is used as the veneer sheet of container bottom board according to claim 13, it is characterized in that described log also can be made up of two or more the timber that is selected from Muscovite birch, tamarack, toothed oak wood, ashtree, linden, elm.
15, the production method that is used as the veneer sheet of container bottom board according to claim 12 is characterized in that described glue is phenolic aldehyde glue.
16, the production method that is used as the veneer sheet of container bottom board according to claim 12 is characterized in that first section pressure that described multilayer veneer is exerted pressure is 1.4-1.6MPA, and the time length of exerting pressure is 25-30 minute; Second section pressure when exerting pressure is 0.3-0.4Mpa, and time 10-15 minute, the temperature when exerting pressure was 135-140 ℃.
17, the production method that is used as the veneer sheet of container bottom board according to claim 12, the double spread amount of wherein said phenolic aldehyde glue is a 350-420 gram/sq m.
18, the production method that is used as the veneer sheet of container bottom board according to claim 12, the anti fouling composition that wherein said gluing step adopts is 4-bromo-2-(right-chlorphenyl)-1-(ethoxymethyl)-5-(trifluoromethyl) pyrroles-3-nitrile, and the amount that contains anti fouling composition accounts for the 4-5% of described glue quantity.
19, the production method that is used as the veneer sheet of container bottom board according to claim 12, the water ratio that wherein is dried to long core veneer and short core veneer is 8%; The water ratio of face ply and bottom veneer is 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03157649 CN1217772C (en) | 2003-09-04 | 2003-09-04 | Container soleplate made of Russian wood and producing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03157649 CN1217772C (en) | 2003-09-04 | 2003-09-04 | Container soleplate made of Russian wood and producing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1522940A true CN1522940A (en) | 2004-08-25 |
| CN1217772C CN1217772C (en) | 2005-09-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03157649 Expired - Fee Related CN1217772C (en) | 2003-09-04 | 2003-09-04 | Container soleplate made of Russian wood and producing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1217772C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202012104002U1 (en) | 2012-10-18 | 2014-01-20 | Ostenbach Gmbh | Plywood multilayered |
| WO2014060413A1 (en) | 2012-10-18 | 2014-04-24 | Ostenbach Gmbh | Multilayer plywood |
| CN105196367A (en) * | 2015-08-28 | 2015-12-30 | 合肥市科天化工有限公司 | Production technology of water-based zero-formaldehyde multiply plywood |
| CN106272749A (en) * | 2016-10-14 | 2017-01-04 | 南京林业大学 | The preparation method of LNG ship plywood |
| CN106738111A (en) * | 2017-01-24 | 2017-05-31 | 曾世涛 | A kind of counter-bending glued board and its manufacture method |
| CN107650216A (en) * | 2017-09-25 | 2018-02-02 | 浙江吉发新材料科技有限公司 | A kind of manufacture method of pine material nematode infected wood manufacture packing case sheet |
| CN107650217A (en) * | 2017-09-25 | 2018-02-02 | 浙江吉发新材料科技有限公司 | A kind of pine material nematode infected wood manufactures packing case flame-retardant plywood material manufacture method |
| CN109015947A (en) * | 2018-08-08 | 2018-12-18 | 阜南盛原木业有限公司 | A kind of preparation method of mould proof corrosion resistant glued board |
| PL424656A1 (en) * | 2018-02-22 | 2019-08-26 | Mieczysław Byrtek | Method for obtaining wall and floor panels from natural wood, preferably from rustic oak |
-
2003
- 2003-09-04 CN CN 03157649 patent/CN1217772C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202012104002U1 (en) | 2012-10-18 | 2014-01-20 | Ostenbach Gmbh | Plywood multilayered |
| WO2014060413A1 (en) | 2012-10-18 | 2014-04-24 | Ostenbach Gmbh | Multilayer plywood |
| CN105196367A (en) * | 2015-08-28 | 2015-12-30 | 合肥市科天化工有限公司 | Production technology of water-based zero-formaldehyde multiply plywood |
| CN106272749A (en) * | 2016-10-14 | 2017-01-04 | 南京林业大学 | The preparation method of LNG ship plywood |
| CN106738111A (en) * | 2017-01-24 | 2017-05-31 | 曾世涛 | A kind of counter-bending glued board and its manufacture method |
| CN106738111B (en) * | 2017-01-24 | 2023-11-07 | 浙江百茂板业有限公司 | Bending-resistant plywood and manufacturing method thereof |
| CN107650216A (en) * | 2017-09-25 | 2018-02-02 | 浙江吉发新材料科技有限公司 | A kind of manufacture method of pine material nematode infected wood manufacture packing case sheet |
| CN107650217A (en) * | 2017-09-25 | 2018-02-02 | 浙江吉发新材料科技有限公司 | A kind of pine material nematode infected wood manufactures packing case flame-retardant plywood material manufacture method |
| PL424656A1 (en) * | 2018-02-22 | 2019-08-26 | Mieczysław Byrtek | Method for obtaining wall and floor panels from natural wood, preferably from rustic oak |
| CN109015947A (en) * | 2018-08-08 | 2018-12-18 | 阜南盛原木业有限公司 | A kind of preparation method of mould proof corrosion resistant glued board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1217772C (en) | 2005-09-07 |
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