CN110978200A - Composite block board and manufacturing method thereof - Google Patents
Composite block board and manufacturing method thereof Download PDFInfo
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- CN110978200A CN110978200A CN201911315066.9A CN201911315066A CN110978200A CN 110978200 A CN110978200 A CN 110978200A CN 201911315066 A CN201911315066 A CN 201911315066A CN 110978200 A CN110978200 A CN 110978200A
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- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000002023 wood Substances 0.000 claims abstract description 51
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 36
- 239000002025 wood fiber Substances 0.000 claims abstract description 36
- 239000000853 adhesive Substances 0.000 claims abstract description 29
- 230000001070 adhesive effect Effects 0.000 claims abstract description 29
- 238000007731 hot pressing Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 230000003449 preventive effect Effects 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 9
- 239000002028 Biomass Substances 0.000 claims description 5
- 229920000877 Melamine resin Polymers 0.000 claims description 5
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 5
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 claims description 5
- -1 phenolic aldehyde Chemical class 0.000 claims description 5
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 238000003892 spreading Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 241000219000 Populus Species 0.000 description 5
- 244000166124 Eucalyptus globulus Species 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 244000055346 Paulownia Species 0.000 description 2
- 210000001145 finger joint Anatomy 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 244000144730 Amygdalus persica Species 0.000 description 1
- 235000006040 Prunus persica var persica Nutrition 0.000 description 1
- 244000046101 Sophora japonica Species 0.000 description 1
- 235000010586 Sophora japonica Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
- B27N3/183—Forming the mat-edges, e.g. by cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a manufacturing method of a composite block board, which comprises the following steps: uniformly stirring wood shavings or wood fibers and an adhesive, and spreading the stirred wood shavings or wood fibers on two plate surfaces of a core board, and performing high-temperature hot pressing to obtain a wood shavings composite core board or a wood fiber composite core board, wherein the hot pressing temperature is 100-150 ℃, the hot pressing pressure and time are divided into three sections, the first section pressure is 0.7-0.9 MPa, the time is 3-10 min, the second section pressure is 0.3-0.5 MPa, the time is 1-10 min, the third section pressure is 0.0-0.3 MPa, and the time is 1-10 min. The composite core-board prepared by the invention has the advantages of good flatness, high surface bonding strength, low water content, dimensional stability, crack resistance, good cold and hot cycle resistance and capability of reducing the production cost.
Description
Technical Field
The invention relates to the technical field of core-board manufacturing, in particular to a composite core-board and a manufacturing method thereof.
Background
The laminated wood board has the characteristics of good screw holding force, high strength, hardness, sound absorption, heat insulation and the like, and has low water content, simple and convenient processing and most extensive application. The facing materials used in the production of the existing core-board mainly comprise:
1) the wood veneer is 0.10-0.75 mm thick, and the wood species include poplar, peach blossom core wood, sophora japonica and the like;
2) the thickness is 0.2-0.6 mm, such as scientific wood veneer;
3) the thickness is 1~ 3mm high density fiberboard.
When the veneer material is used, the upper surface and the lower surface of the core-board are coated with glue and adhered to the coated surface, and the base material is formed by pressing through working procedures of cold pressing, hot pressing and the like. The base material or finished veneer product pressed and pasted by the two facing materials 1) and 2) has the defects of poor surface flatness, low surface bonding strength, high water content, dimensional stability, crack resistance, poor cold and hot cycle resistance and the like. The board base material or finished veneer product pressed and pasted by the facing material in the step 3) has the problems of formaldehyde pollution, lower surface bonding strength, larger water absorption thickness expansion rate, larger thickness, higher production cost and the like.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the composite block board prepared by the method has the advantages of good flatness, high surface bonding strength, low water content, good dimensional stability, crack resistance and cold and hot cycle resistance, and can reduce the production cost.
The technical scheme adopted by the invention is as follows: provided is a method for manufacturing a composite block board, including the steps of:
uniformly stirring wood shavings or wood fibers and an adhesive, wherein the adhesive is a mixture of a polyurethane adhesive, an aldehyde-free biomass adhesive, urea formaldehyde, phenolic aldehyde, melamine formaldehyde, a waterproof agent, a mildew preventive and a tackifier; when the wood shaving is used, the glue application amount of the adhesive is 7-35% of the weight of the wood shaving, the waterproof agent is 0.05-3.4% of the weight of the wood shaving, the mildew preventive is 0.01-4.5% of the weight of the wood shaving, and the water content of the wood shaving is dried to 5-12% after the wood shaving and the adhesive are stirred; when the wood fiber is used, the glue application amount is 7-35% of the weight of the wood fiber, the waterproof agent is 0.3-0.6% of the weight of the wood fiber, the mildew preventive is 0.1-0.4% of the weight of the wood fiber, and the water content of the fiber is dried to 3-15% after being stirred with the adhesive.
And secondly, paving the stirred wood shavings or wood fibers on two plate surfaces of the block board, and performing high-temperature hot pressing to prepare the wood shavings-combined block board or the wood fiber-combined block board, wherein the hot pressing temperature is 100-150 ℃, the hot pressing pressure and time are divided into three sections, the first section pressure is 0.7-0.9 MPa, the time is 3-10 min, the second section pressure is 0.3-0.5 MPa, the time is 1-10 min, and the third section pressure is 0.0-0.3 MPa, and the time is 1-10 min.
Step three, after hot pressing, the composite blockboard is cooled for more than 5min by air blowing, and then the board is collected and stacked; the wood fiber composite block board is naturally cured for more than 7 days, then edge sawing and sanding are carried out to fix the thickness, and the board thickness error is controlled to be +/-0.1 mm.
The size of the sieve mesh of the wood shavings is 0.11 x 0.11-1.53 x 1.53mm, and the thickness of the wood fibers is 0.2-0.6 mm.
The paving amount of the wood shavings is 0.5kg/m 2-3.5 kg/m2, and the paving thickness is 1mm-3 mm; the paving amount of the wood fiber is 0.7kg/m 2-3.9 kg/m2, and the paving thickness is 1mm-3 mm.
The invention provides a composite core-board manufactured by the manufacturing method.
The invention has the following beneficial effects:
1. the composite core-board has the advantages of good flatness, high surface bonding strength, low water content, dimensional stability, crack resistance and good cold and hot cycle resistance.
2. The polyurethane adhesive, the formaldehyde-free biomass adhesive, the urea formaldehyde, the phenolic aldehyde, the melamine formaldehyde, the waterproof agent, the mildew preventive and the tackifier are mixed, so that the water absorption thickness expansion rate is low, the thickness can be below 1mm, and the production cost is low.
3. The wood shavings and the wood fibers are mixed with the glue and paved on the surface of the laminated wood board for hot pressing forming, the surface of the laminated wood board does not need to be coated with the glue, and the production cost is saved.
4. The wood shavings and the wood fibers can be prepared by using production waste materials such as twigs, small-diameter wood and the like, so that the waste materials are changed into valuable materials, and the problem of lack of wood raw materials is solved.
5. Under the condition that the thickness of the finished product is not changed, the thickness of the laminated wood board for direct sticking is reduced, and the production cost is saved.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1
A method of manufacturing a composite core-board, comprising the steps of:
uniformly stirring wood shavings and an adhesive, wherein the adhesive is a mixture of a polyurethane adhesive, a formaldehyde-free biomass adhesive, urea formaldehyde, phenolic aldehyde, melamine formaldehyde, a waterproof agent, a mildew preventive and a tackifier; the glue application amount of the adhesive is 7-35% of the weight of the wood shavings, the waterproof agent is 0.05-3.4% of the weight of the wood shavings, the mildew preventive is 0.01-4.5% of the weight of the wood shavings, and the water content of the shavings is dried to 5-12% after being stirred with the adhesive; the size of the sieve mesh of the wood shavings is 0.11 x 0.11-1.53 x 1.53mm, and the wood shavings can be planted except paulownia trees, such as poplar, eucalyptus, miscellaneous trees and the like.
Paving the stirred wood shavings on two plate surfaces of the block board, and performing high-temperature hot pressing to prepare the wood shavings composite block board, wherein the hot pressing temperature is 100-150 ℃, the hot pressing pressure and time are divided into three sections, the first section pressure is 0.7-0.9 MPa, the time is 3-10 min, the second section pressure is 0.3-0.5 MPa, the time is 1-10 min, and the third section pressure is 0.0-0.3 MPa, and the time is 1-10 min. The laying amount of the wood shavings is 0.5kg/m2～3.5kg/m2The paving thickness is 1mm-3mm, and the thickness of the joinery board is 12-18 mmThe core of the core-board is formed by assembling solid wood laths with certain thickness in a way that the length direction is in finger joint or butt joint and the width direction is in butt joint, wherein the solid wood laths are planted with poplar, eucalyptus, fir and the like.
Step three, after hot pressing, the composite blockboard is cooled for more than 5min by air blowing, and then the board is collected and stacked;
example 2
A method of manufacturing a composite core-board, comprising the steps of:
uniformly stirring wood fibers and an adhesive, wherein the adhesive is a mixture of a polyurethane adhesive, a formaldehyde-free biomass adhesive, urea formaldehyde, phenolic aldehyde, melamine formaldehyde, a waterproof agent, a mildew preventive and a tackifier; the glue application amount of the adhesive is 7-35% of the weight of the wood fiber, the waterproof agent is 0.05-3.4% of the weight of the wood fiber, the mildew preventive is 0.01-4.5% of the weight of the wood fiber, and the water content of the wood fiber is dried to 3-15% after being stirred with the adhesive; the thickness of the wood fiber is 0.2-0.6 mm, and the wood fiber can be planted in any types except paulownia, such as poplar, eucalyptus, miscellaneous trees and the like.
Paving the stirred wood fibers on two plate surfaces of the core-board, and performing high-temperature hot pressing to prepare the wood fiber composite core-board, wherein the hot pressing temperature is 100-150 ℃, the hot pressing pressure and time are divided into three sections, the first section pressure is 0.7-0.9 MPa, the time is 3-10 min, the second section pressure is 0.3-0.5 MPa, the time is 1-10 min, and the third section pressure is 0.0-0.3 MPa, and the time is 1-10 min. The wood fiber paving amount is 0.7kg/m 2-3.9 kg/m2, the paving thickness is 1mm-3mm, the thickness of the core board is 12-18 mm, the length is (2450-2750) mm (1230-1310) mm, the core of the core board is formed by finger joint or butt joint in the length direction and butt joint in the width direction of a solid wood strip with a certain thickness, and the solid wood strip is planted with poplar, eucalyptus, fir and the like.
Step three, after hot pressing, the composite blockboard is cooled for more than 5min by air blowing, and then the board is collected and stacked; the wood fiber composite block board is naturally cured for more than 7 days, then edge sawing and sanding are carried out to fix the thickness, and the board thickness error is controlled to be +/-0.1 mm.
The composite blockboard manufactured by the manufacturing methods of the two embodiments has the advantages of good flatness, high surface bonding strength, low water content, good dimensional stability, crack resistance and good cold and hot cycle resistance.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
The following are the results of the composite core-board tests made in the two examples.
Example 1
Example 2
Claims (4)
1. A method of manufacturing a composite core-board, comprising the steps of:
uniformly stirring wood shavings or wood fibers and an adhesive, wherein the adhesive is a mixture of a polyurethane adhesive, an aldehyde-free biomass adhesive, urea formaldehyde, phenolic aldehyde, melamine formaldehyde, a waterproof agent, a mildew preventive and a tackifier; when the wood shaving is used, the glue application amount of the adhesive is 7-35% of the weight of the wood shaving, the waterproof agent is 0.05-3.4% of the weight of the wood shaving, the mildew preventive is 0.01-4.5% of the weight of the wood shaving, and the water content of the wood shaving is dried to 5-12% after the wood shaving and the adhesive are stirred; when the wood fiber is used, the glue application amount is 7-35% of the weight of the wood fiber, the waterproof agent is 0.3-0.6% of the weight of the wood fiber, the mildew preventive is 0.1-0.4% of the weight of the wood fiber, and the water content of the fiber is dried to 3-15% after the wood fiber and the adhesive are stirred;
paving the stirred wood shavings or wood fibers on two plate surfaces of a block board, and performing high-temperature hot pressing to prepare a wood shavings composite block board or a wood fiber composite block board, wherein the hot pressing temperature is 100-150 ℃, the hot pressing pressure and time are divided into three sections, the first section pressure is 0.7-0.9 MPa, the time is 3-10 min, the second section pressure is 0.3-0.5 MPa, the time is 1-10 min, the third section pressure is 0.0-0.3 MPa, and the time is 1-10 min;
step three, after hot pressing, the composite blockboard is cooled for more than 5min by air blowing, and then the board is collected and stacked; the wood fiber composite block board is naturally cured for more than 7 days, then edge sawing and sanding are carried out to fix the thickness, and the board thickness error is controlled to be +/-0.1 mm.
2. The method of manufacturing a composite block board according to claim 1, wherein: the size of the sieve mesh of the wood shavings is 0.11 x 0.11-1.53 x 1.53mm, and the thickness of the wood fibers is 0.2-0.6 mm.
3. The method of manufacturing a composite block board according to claim 1, wherein: the paving amount of the wood shavings is 0.5kg/m 2-3.5 kg/m2, and the paving thickness is 1mm-3 mm; the wood fiber laying amount was 0.7kg/m2~3.9kg/m2And the paving thickness is 1mm-3 mm.
4. A composite core-board produced by the method of manufacture according to any one of claims 1 to 3.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911315066.9A CN110978200A (en) | 2019-12-19 | 2019-12-19 | Composite block board and manufacturing method thereof |
| JP2020041436A JP7015857B2 (en) | 2019-12-18 | 2020-03-11 | Wood-based composite board and its manufacturing method |
| US16/819,011 US20210189134A1 (en) | 2019-12-18 | 2020-03-13 | Wood Composite Board and Preparation Method Thereof |
| PT201651197T PT3838529T (en) | 2019-12-18 | 2020-03-24 | Wood composite board and preparation method thereof |
| SI202030233T SI3838529T1 (en) | 2019-12-18 | 2020-03-24 | Wood composite board and preparation method thereof |
| EP20165119.7A EP3838529B1 (en) | 2019-12-18 | 2020-03-24 | Wood composite board and preparation method thereof |
| ES20165119T ES2950721T3 (en) | 2019-12-18 | 2020-03-24 | Wood composite board and preparation method thereof |
| PL20165119.7T PL3838529T3 (en) | 2019-12-18 | 2020-03-24 | Wood composite board and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911315066.9A CN110978200A (en) | 2019-12-19 | 2019-12-19 | Composite block board and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110978200A true CN110978200A (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911315066.9A Pending CN110978200A (en) | 2019-12-18 | 2019-12-19 | Composite block board and manufacturing method thereof |
Country Status (1)
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| CN (1) | CN110978200A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115026915A (en) * | 2022-05-13 | 2022-09-09 | 千年舟新材科技集团股份有限公司 | First-laid type veneered large-piece shaving composite blockboard and manufacturing method thereof |
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