CN108437130B - Method for manufacturing formaldehyde-free bamboo chip board - Google Patents
Method for manufacturing formaldehyde-free bamboo chip board Download PDFInfo
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- CN108437130B CN108437130B CN201810138976.3A CN201810138976A CN108437130B CN 108437130 B CN108437130 B CN 108437130B CN 201810138976 A CN201810138976 A CN 201810138976A CN 108437130 B CN108437130 B CN 108437130B
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- manufacturing
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 92
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 92
- 241001330002 Bambuseae Species 0.000 title claims abstract description 92
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 92
- 239000011425 bamboo Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000011093 chipboard Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 230000001070 adhesive effect Effects 0.000 claims abstract description 74
- 239000000853 adhesive Substances 0.000 claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 239000002023 wood Substances 0.000 claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000007731 hot pressing Methods 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 239000012790 adhesive layer Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 35
- 229920001661 Chitosan Polymers 0.000 claims description 30
- 241000209020 Cornus Species 0.000 claims description 29
- 235000009496 Juglans regia Nutrition 0.000 claims description 23
- 235000020234 walnut Nutrition 0.000 claims description 23
- 229920002752 Konjac Polymers 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 21
- 235000010485 konjac Nutrition 0.000 claims description 21
- 244000247812 Amorphophallus rivieri Species 0.000 claims description 20
- 235000001206 Amorphophallus rivieri Nutrition 0.000 claims description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 20
- 239000000252 konjac Substances 0.000 claims description 20
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 20
- 239000003755 preservative agent Substances 0.000 claims description 20
- 230000002335 preservative effect Effects 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 238000003815 supercritical carbon dioxide extraction Methods 0.000 claims description 20
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 18
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- 235000021419 vinegar Nutrition 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- 108010073771 Soybean Proteins Proteins 0.000 claims description 14
- 239000002639 bone cement Substances 0.000 claims description 13
- 235000019710 soybean protein Nutrition 0.000 claims description 13
- LUEWUZLMQUOBSB-FSKGGBMCSA-N (2s,3s,4s,5s,6r)-2-[(2r,3s,4r,5r,6s)-6-[(2r,3s,4r,5s,6s)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2r,4r,5s,6r)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol Chemical compound O[C@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@@H](O[C@@H]2[C@H](O[C@@H](OC3[C@H](O[C@@H](O)[C@@H](O)[C@H]3O)CO)[C@@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O LUEWUZLMQUOBSB-FSKGGBMCSA-N 0.000 claims description 12
- 229920002581 Glucomannan Polymers 0.000 claims description 12
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 12
- 239000004202 carbamide Substances 0.000 claims description 12
- 229940046240 glucomannan Drugs 0.000 claims description 12
- 239000001632 sodium acetate Substances 0.000 claims description 12
- 235000017281 sodium acetate Nutrition 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000004833 fish glue Substances 0.000 claims description 11
- 235000018102 proteins Nutrition 0.000 claims description 11
- 102000004169 proteins and genes Human genes 0.000 claims description 11
- 108090000623 proteins and genes Proteins 0.000 claims description 11
- 239000001569 carbon dioxide Substances 0.000 claims description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 10
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 10
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 102000016943 Muramidase Human genes 0.000 claims description 9
- 108010014251 Muramidase Proteins 0.000 claims description 9
- 108010062010 N-Acetylmuramoyl-L-alanine Amidase Proteins 0.000 claims description 9
- 239000004325 lysozyme Substances 0.000 claims description 9
- 235000010335 lysozyme Nutrition 0.000 claims description 9
- 229960000274 lysozyme Drugs 0.000 claims description 9
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 9
- 229960004889 salicylic acid Drugs 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 238000000197 pyrolysis Methods 0.000 claims description 8
- 229960000789 guanidine hydrochloride Drugs 0.000 claims description 7
- PJJJBBJSCAKJQF-UHFFFAOYSA-N guanidinium chloride Chemical compound [Cl-].NC(N)=[NH2+] PJJJBBJSCAKJQF-UHFFFAOYSA-N 0.000 claims description 7
- 229950005499 carbon tetrachloride Drugs 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 24
- 241000758789 Juglans Species 0.000 description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 235000011187 glycerol Nutrition 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
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- 238000010298 pulverizing process Methods 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 2
- 229930007105 (-)-alpha-thujone Natural products 0.000 description 1
- 235000010894 Artemisia argyi Nutrition 0.000 description 1
- 241001435059 Artemisia argyi Species 0.000 description 1
- 206010008479 Chest Pain Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010024264 Lethargy Diseases 0.000 description 1
- 206010028372 Muscular weakness Diseases 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 208000010505 Nose Neoplasms Diseases 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 108010064851 Plant Proteins Proteins 0.000 description 1
- 208000000453 Skin Neoplasms Diseases 0.000 description 1
- GAMYVSCDDLXAQW-AOIWZFSPSA-N Thermopsosid Natural products O(C)c1c(O)ccc(C=2Oc3c(c(O)cc(O[C@H]4[C@H](O)[C@@H](O)[C@H](O)[C@H](CO)O4)c3)C(=O)C=2)c1 GAMYVSCDDLXAQW-AOIWZFSPSA-N 0.000 description 1
- USMNOWBWPHYOEA-UHFFFAOYSA-N alpha-thujone Natural products CC1C(=O)CC2(C(C)C)C1C2 USMNOWBWPHYOEA-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 239000000227 bioadhesive Substances 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 229940045110 chitosan Drugs 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
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- 239000000839 emulsion Substances 0.000 description 1
- 229930003944 flavone Natural products 0.000 description 1
- 150000002212 flavone derivatives Chemical class 0.000 description 1
- 235000011949 flavones Nutrition 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 210000003026 hypopharynx Anatomy 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000036473 myasthenia Effects 0.000 description 1
- 208000037830 nasal cancer Diseases 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 235000021118 plant-derived protein Nutrition 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 229930004725 sesquiterpene Natural products 0.000 description 1
- 150000004354 sesquiterpene derivatives Chemical class 0.000 description 1
- 201000000849 skin cancer Diseases 0.000 description 1
- 229940001941 soy protein Drugs 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 229940045136 urea Drugs 0.000 description 1
- VHBFFQKBGNRLFZ-UHFFFAOYSA-N vitamin p Natural products O1C2=CC=CC=C2C(=O)C=C1C1=CC=CC=C1 VHBFFQKBGNRLFZ-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- USMNOWBWPHYOEA-MRTMQBJTSA-N α-thujone Chemical compound O=C([C@@H]1C)C[C@@]2(C(C)C)[C@@H]1C2 USMNOWBWPHYOEA-MRTMQBJTSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- 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
- C09J105/00—Adhesives based on polysaccharides or on their derivatives, not provided for in groups C09J101/00 or C09J103/00
- C09J105/02—Dextran; Derivatives thereof
-
- 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
- C09J105/00—Adhesives based on polysaccharides or on their derivatives, not provided for in groups C09J101/00 or C09J103/00
- C09J105/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C5/00—Production of pyroligneous acid distillation of wood, dry distillation of organic waste
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a manufacturing method of a formaldehyde-free bamboo chip board, which comprises the steps of heat treatment, bamboo chip manufacturing, drying, repairing, primary gluing, assembly, prepressing, secondary gluing, hot pressing, cooling, edge cutting and polishing. Wherein the heat treatment process comprises the following steps: placing the bamboo in hot steam for heat preservation for 3-5 h; the drying comprises the following steps: drying the wood until the moisture percentage content of the wood is 15-23%; coating the adhesive A on the surface of the wood to form an adhesive layer; the prepressing process comprises the steps of standing the assembled wood for 10-20 min, and prepressing at 0-5 ℃ for 10-20 min, wherein the prepressing pressure is 0.5-1.0 Mpa; coating the adhesive B on the surface of the wood to form an adhesive layer; the hot pressing process comprises the following steps: and (3) pressing the pre-pressed wood at the temperature of 80-85 ℃ for 2-3 min by adopting the pressure of 1.0-1.5 Mpa. The bamboo chip board manufactured by the manufacturing method of the bamboo chip board has the advantages of no formaldehyde, good adhesiveness and high water resistance.
Description
Technical Field
The invention relates to the technical field of board manufacturing, in particular to a manufacturing method of a formaldehyde-free bamboo chip board.
Background
The formaldehyde-containing adhesive is used in the board manufacturing process, so that formaldehyde can be released when the formaldehyde-containing adhesive is used for furniture. Formaldehyde can cause respiratory and nervous diseases, such as cough, pharyngalgia, chest distress, dizziness, nausea, myasthenia of limbs, dyspnea, lethargy, etc., and can also induce the occurrence of cancers, such as nasal cancer, laryngopharynx cancer, skin cancer and leukemia.
In the prior art, most of adhesives adopted contain formaldehyde, while adhesives without formaldehyde can be natural high molecular polymers, mainly soybean protein adhesives and the like, but the adhesives have the defects of low bonding strength, poor water resistance and the like. Therefore, the formaldehyde-free adhesive with high strength and good water resistance is prepared, and the formaldehyde-free adhesive is applied to the manufacture of the plate and is beneficial to manufacturing the formaldehyde-free plate.
Disclosure of Invention
The invention solves the technical problem that the bamboo chip board in the prior art contains formaldehyde, and provides a method for manufacturing the bamboo chip board without formaldehyde.
In order to solve the problems, the invention adopts the following technical scheme:
a method for manufacturing a formaldehyde-free bamboo chip board comprises the steps of heat treatment, bamboo chip manufacturing, drying, repairing, primary gluing, assembly, prepressing, secondary gluing, hot pressing, cooling, edge cutting and polishing.
The heat treatment process comprises the following steps: placing the bamboo in hot steam for heat preservation for 3-5 h;
the drying conditions are as follows: placing the bamboo chips in a dryer with the relative air humidity of 10-20%, drying at the temperature of 40-50 ℃ and the wind speed of 10-20 m/s until the moisture percentage content of the bamboo chips is 15-23%;
the one-step gluing process comprises the step of coating an adhesive A on the surface of a bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive A is 100-200 g/m2(ii) a The adhesive A comprises the following raw materials in parts by mass: 20-30 parts of chitosan, 10-30 parts of konjac chitosan, 1-4 parts of lysozyme, 40-50 parts of fish glue protein, 5-10 parts of montmorillonite, 1-5 parts of salicylic acid and 1-6 parts of potassium dichromate;
the prepressing process comprises the steps of standing the assembled bamboo chips for 10-20 min, and prepressing at 0-5 ℃ for 10-20 min, wherein the prepressing pressure is 0.5-1.0 Mpa;
the secondary gluing process comprises the step of coating an adhesive B on the surface of the bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive B is 450-500 g/m2；
The hot pressing process comprises the following steps: and (3) pressing the pre-pressed bamboo chips at the temperature of 80-85 ℃ for 2-3 min by adopting the pressure of 1.0-1.5 Mpa.
The adhesive B comprises the following raw materials in parts by mass: 15-20 parts of konjac glucomannan, 8-13 parts of chitosan, 3-5 parts of urea, 4-8 parts of guanidine hydrochloride, 10-15 parts of soybean protein, 20-24 parts of bone glue, 0.1-3 parts of sodium acetate, 1-3 parts of glycerol and 0.1-2 parts of preservative.
In the assembly process, the included angle of the fibers of the two wood boards is 90 degrees, and the number of the assembly layers is odd.
The adhesive B is prepared by the following method: dissolving soybean protein and bone glue in 1-2 wt% of a hydroxide solution, adding urea and hydrochloric acid, placing the mixture in a stirring kettle, stirring the mixture for 25-30 min at a rotating speed of 200-300 r/min, adding konjac glucomannan and chitosan, and stirring the mixture for 5-10 min at a rotating speed of 100-150 r/min; and then adding sodium acetate, glycerol and a preservative, and uniformly stirring to obtain the adhesive.
Wherein the preservative comprises walnut shell wood vinegar, dogwood extract and folium artemisiae argyi extract.
Wherein, the dogwood extract is prepared by the following method: crushing dogwood, placing the crushed dogwood in a supercritical carbon dioxide extraction kettle, and extracting for 50-60 min by using an entrainer which is a mixture of ethyl acetate and ethanol in a mass ratio of 1: 3-6 to obtain the dogwood extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 27-34 ℃, the extraction pressure is 45Mpa, and the flow rate of carbon dioxide is 8 Kg/h.
Wherein the folium artemisiae argyi extract is prepared by the following steps: crushing folium artemisiae argyi, putting the crushed folium artemisiae argyi into a supercritical carbon dioxide extraction kettle, and extracting for 20-25 min by using tetrachloromethane as an entrainer to obtain the folium artemisiae argyi extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 30-40 ℃, the extraction pressure is 40Mpa, and the flow rate of carbon dioxide is 4 Kg/h.
Wherein, the walnut shell wood vinegar is prepared by the following extraction method: placing the walnut shells in a charcoal kiln for heating and dry distillation, heating up and pyrolyzing at a heating rate of 20-50 ℃/h, heating up to 300-350 ℃, preserving heat for 1-2 h, and collecting distillate to obtain walnut kernel wood vinegar.
The preservative mainly contains phenol, flavone, terpenoids, tannin and organic acid such as alpha-thujone and sesquiterpene alcohol in walnut shell wood vinegar, folium artemisiae argyi extract and dogwood extract, can prevent bone glue and soybean protein from deteriorating, and has bacteriostatic and bactericidal effects.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the manufacturing method of the formaldehyde-free bamboo chip board, firstly, an adhesive consisting of chitosan, konjac chitosan, lysozyme, fish glue protein, montmorillonite, salicylic acid and potassium dichromate is coated and pre-pressed, the adhesive can be filled in gaps in bamboo fibers, and meanwhile, the bamboo fibers in the surface of the bamboo chip can be bonded, so that the bamboo chip board which is firm in structure and strong in adhesive force can be manufactured in a hot pressing process. The adhesive is characterized in that fish glue protein is used as a main component, but the adhesive is not high in adhesive force and water-proof, after montmorillonite is added into the adhesive, the adhesive is not fine enough, the emulsion is rough, but the montmorillonite can be filled in bamboo fiber gaps, wherein chitosan and konjac chitosan can enhance the adhesive property of the fish glue protein, and after salicylic acid and potassium dichromate are added, the adhesive becomes fine and stable, and the curing effect is good.
(2) The adhesive adopted by the invention is natural adhesive, formaldehyde is not generated, and konjac glucomannan, chitosan, urea, guanidine hydrochloride, soy protein, bone glue, sodium acetate, glycerol and preservative are used. The urea and hydrochloric acid arc can modify soybean protein and bone glue, raise water-proofing property and cohesive force of natural plant protein, and the konjak glucomannan, chitosan and glycerine can raise viscosity and plasticity, and the sodium acetate can raise adhesive rate of adhesive.
(3) The preservative disclosed by the invention is composed of walnut shell wood vinegar, folium artemisiae argyi extract and dogwood extract, has broad-spectrum sterilization and bacteriostasis effects, prevents the putrefaction and deterioration of an adhesive, improves the stability of a gelling agent, has a good adhesive bonding effect, and does not split for a long time.
(4) The bamboo chips are put into hot steam for heat treatment to remove resin and cell sap, thus being beneficial to drying, gluing and painting the board.
Detailed Description
The present invention will be further described with reference to examples and tests.
Example 1
The manufacturing method of the formaldehyde-free bamboo chip board comprises the following steps:
(1) and (3) heat treatment: placing bamboo in hot steam, and keeping the temperature for 5 h;
(2) making into bamboo chips;
(3) and (3) drying: placing the bamboo chips in a dryer with the relative humidity of air of 10%, drying at 50 deg.C and wind speed of 10m/s until the water content of the bamboo chips is 23%;
(4) repairing: repairing and finishing bamboo chips with poor shapes;
(5) primary gluing: coating an adhesive A on the surface of a bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive A is 100g/m2(ii) a The adhesive A comprises the following raw materials in parts by mass: 30 parts of chitosan, 10 parts of konjac chitosan, 4 parts of lysozyme, 40 parts of fish glue protein, 10 parts of montmorillonite, 1 part of salicylic acid and 6 parts of potassium dichromate;
(6) assembling: the included angle of the fibers of the two bamboo chip boards is 90 degrees, and the number of the layers of the assembly is odd;
(7) pre-pressing: standing the assembled bamboo chips for 10min, and then pre-pressing for 10min at 5 ℃, wherein the pre-pressing pressure is 1.0 Mpa;
(8) secondary gluing: coating the adhesive B on the surface of the bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive B is 450g/m2(ii) a The adhesive B comprises the following raw materials in parts by mass: 20 parts of konjac glucomannan, 8 parts of chitosan, 5 parts of urea, 4 parts of guanidine hydrochloride, 15 parts of soybean protein, 20 parts of bone glue, 3 parts of sodium acetate, 1 part of glycerol and 2 parts of preservative; the adhesive B is prepared by the following method: dissolving soybean protein and bone glue in 1-2 wt% of a hydrogen hydroxide solution, adding urea and hydrochloric acid, placing the mixture in a stirring kettle, stirring the mixture for 30min at a rotation speed of 200r/min, adding konjac glucomannan and chitosan, and stirring the mixture for 10min at a rotation speed of 100 r/min; adding sodium acetate, glycerol and a preservative, and then uniformly stirring to obtain the adhesive;
(9) hot pressing: pressing the pre-pressed bamboo chips at 80 deg.C under 1.5Mpa for 2 min;
(10) and (3) cooling: cooling the bamboo chip plate after hot pressing to room temperature;
(11) cutting edges and polishing.
Wherein the preservative adopted in the adhesive B consists of walnut shell wood vinegar, dogwood extract and folium artemisiae argyi extract; the dogwood extract is prepared by the following method: crushing dogwood, placing the crushed dogwood in a supercritical carbon dioxide extraction kettle, and extracting for 50min by using an entrainer which is a mixture of ethyl acetate and ethanol in a mass ratio of 1:6 to obtain the dogwood extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 34 ℃, the extraction pressure is 45Mpa, and the flow rate of carbon dioxide is 8 Kg/h. The folium artemisiae argyi extract is prepared by the following steps: pulverizing folium Artemisiae Argyi, placing in supercritical carbon dioxide extraction kettle, and extracting with tetrachloromethane as entrainer for 20min to obtain folium Artemisiae Argyi extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 40 ℃, the extraction pressure is 40Mpa, and the flow rate of carbon dioxide is 4 Kg/h. The walnut shell wood vinegar is prepared by extracting the following steps: placing walnut shells in a charcoal kiln for heating and dry distillation, heating up for pyrolysis at a heating rate of 20 ℃/h, heating up to 350 ℃, preserving heat for 1h, and collecting distillate to obtain walnut kernel wood vinegar.
Example 2
The manufacturing method of the formaldehyde-free bamboo chip board comprises the following steps:
(1) and (3) heat treatment: placing bamboo in hot steam, and keeping the temperature for 3 h;
(2) making into bamboo chips;
(3) and (3) drying: placing the bamboo chips in a dryer with the relative humidity of air of 20%, drying at 40 deg.C and air speed of 20m/s until the water content of the bamboo chips is 15%;
(4) repairing: repairing and finishing bamboo chips with poor shapes;
(5) primary gluing: coating an adhesive A on the surface of a bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive A is 200g/m2(ii) a The adhesive A comprises the following raw materials in parts by mass: 20 parts of chitosan, 30 parts of konjac chitosan, 1 part of lysozyme, 50 parts of fish glue protein, 5 parts of montmorillonite, 5 parts of salicylic acid and 1 part of potassium dichromate;
(6) assembling: the fiber included angle of the two bamboo chip boards is 90 degrees, and the number of the assembly layers is 3;
(7) pre-pressing: standing the assembled bamboo chips for 20min, and then pre-pressing for 10min at 0-5 ℃, wherein the pre-pressing pressure is 1.0 Mpa;
(8) secondary gluing: coating the adhesive B on the surface of the bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive B is 450g/m2(ii) a The adhesive B comprises the following raw materials in parts by mass: 20 parts of konjac glucomannan, 8 parts of chitosan, 5 parts of urea, 4 parts of guanidine hydrochloride, 15 parts of soybean protein, 20 parts of bone glue, 3 parts of sodium acetate, 1 part of glycerol and 2 parts of preservative; the adhesive B is prepared by the following method: dissolving soybean protein and bone glue in 1-2 wt% of a hydrogen hydroxide solution, adding urea and hydrochloric acid, placing the mixture in a stirring kettle, stirring the mixture for 25-30 min at a rotation speed of 200r/min, adding konjac glucomannan and chitosan, and stirring the mixture for 5min at a rotation speed of 150 r/min; adding sodium acetate, glycerol and a preservative, and then uniformly stirring to obtain the adhesive;
(9) hot pressing: pressing the pre-pressed bamboo chips at 85 deg.C under 1.0Mpa for 3 min;
(10) and (3) cooling: cooling the bamboo chip plate after hot pressing to room temperature;
(11) cutting edges and polishing.
Wherein the preservative adopted in the adhesive B consists of walnut shell wood vinegar, dogwood extract and folium artemisiae argyi extract; the dogwood extract is prepared by the following method: crushing dogwood, placing the crushed dogwood in a supercritical carbon dioxide extraction kettle, and extracting for 60min by using an entrainer which is a mixture of ethyl acetate and ethanol in a mass ratio of 1:3 to obtain the dogwood extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 27 ℃, the extraction pressure is 45Mpa, and the flow rate of carbon dioxide is 8 Kg/h. The folium artemisiae argyi extract is prepared by the following steps: pulverizing folium Artemisiae Argyi, placing in supercritical carbon dioxide extraction kettle, and extracting with tetrachloromethane as entrainer for 25min to obtain folium Artemisiae Argyi extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 30 ℃, the extraction pressure is 40Mpa, and the flow rate of carbon dioxide is 4 Kg/h. The walnut shell wood vinegar is prepared by extracting the following steps: placing walnut shells in a charcoal kiln for heating and dry distillation, heating up for pyrolysis at a heating rate of 50 ℃/h, heating up to 300 ℃, preserving heat for 2h, and collecting distillate to obtain walnut kernel wood vinegar.
Example 3
The manufacturing method of the formaldehyde-free bamboo chip board comprises the following steps:
(1) and (3) heat treatment: placing bamboo in hot steam, and keeping the temperature for 4 h;
(2) making into bamboo chips;
(3) and (3) drying: placing the bamboo chips in a dryer with the relative humidity of air of 15%, drying at 45 deg.C and 15m/s until the water content of the bamboo chips is 20%;
(4) repairing: repairing and finishing bamboo chips with poor shapes;
(5) primary gluing: coating an adhesive A on the surface of a bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive A is 150g/m 2; the adhesive A comprises the following raw materials in parts by mass: 25 parts of chitosan, 20 parts of konjac chitosan, 3 parts of lysozyme, 45 parts of fish glue protein, 8 parts of montmorillonite, 3 parts of salicylic acid and 5 parts of potassium dichromate;
(6) assembling: the fiber included angle of the two bamboo chip boards is 90 degrees, and the number of the assembly layers is 7;
(7) pre-pressing: standing the assembled bamboo chips for 15min, and prepressing at 3 ℃ for 15min, wherein the prepressing pressure is 0.8 Mpa;
(8) secondary gluing: coating an adhesive B on the surface of a bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive B is 480g/m 2; the adhesive B comprises the following raw materials in parts by mass: 18 parts of konjac glucomannan, 10 parts of chitosan, 4 parts of urea, 7 parts of guanidine hydrochloride, 13 parts of soybean protein, 22 parts of bone glue, 1 part of sodium acetate, 2 parts of glycerol and 1 part of preservative; the adhesive B is prepared by the following method: dissolving soybean protein and bone glue in 2 wt% of hydrogen hydroxide solution, adding urea and hydrochloric acid arc, stirring in a stirring kettle at 250r/min for 29min, adding konjac glucomannan and chitosan, and stirring at 130r/min for 8 min; adding sodium acetate, glycerol and a preservative, and then uniformly stirring to obtain the adhesive;
(9) hot pressing: pressing the pre-pressed bamboo chips at 82 deg.C under 1.3Mpa for 3 min;
(10) and (3) cooling: cooling the bamboo chip plate after hot pressing to room temperature;
(11) cutting edges and polishing.
Wherein the preservative adopted in the adhesive B consists of walnut shell wood vinegar, dogwood extract and folium artemisiae argyi extract; the dogwood extract is prepared by the following method: crushing dogwood, placing the crushed dogwood in a supercritical carbon dioxide extraction kettle, and extracting for 55min by using an entrainer which is a mixture of ethyl acetate and ethanol in a mass ratio of 1:5 to obtain the dogwood extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 30 ℃, the extraction pressure is 45Mpa, and the flow rate of carbon dioxide is 8 Kg/h. The folium artemisiae argyi extract is prepared by the following steps: pulverizing folium Artemisiae Argyi, placing in supercritical carbon dioxide extraction kettle, and extracting with tetrachloromethane as entrainer for 22min to obtain folium Artemisiae Argyi extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 35 ℃, the extraction pressure is 40Mpa, and the flow rate of carbon dioxide is 4 Kg/h. The walnut shell wood vinegar is prepared by extracting the following steps: placing walnut shells in a charcoal kiln for heating and dry distillation, heating up for pyrolysis at a heating rate of 40 ℃/h, heating up to 320 ℃, preserving heat for 2h, and collecting distillate to obtain walnut kernel wood vinegar.
To illustrate the technical effects of the present invention, the following control groups were set:
control group 1
The method for manufacturing the formaldehyde-free bamboo chip board in the comparison group 1 is basically the same as that of the formaldehyde-free bamboo chip board in the embodiment 1, and the difference is that the adhesive A is not coated before the prepressing of the comparison group 1.
Control group 2
The preparation method of the control group 2 is basically the same as that of the formaldehyde-free bamboo chip board in the embodiment 1, and the difference is that the adhesive A in the control group 2 consists of lysozyme, fish glue protein, montmorillonite, salicylic acid and potassium dichromate.
Control group 3
The comparative group 3 is basically the same as the manufacturing method of the formaldehyde-free bamboo chip board of the embodiment 1, except that; the adhesive A of the control group 3 consists of chitosan, konjac chitosan, lysozyme, fish glue protein and potassium dichromate.
Control group 4
The comparative group 4 was prepared in substantially the same manner as the formaldehyde-free bamboo chip board of example 1, except that the adhesive B of the comparative group 4 did not contain any preservative.
Control group 5
The comparative group 5 was prepared in substantially the same manner as the formaldehyde-free bamboo chip board of example 1, except that the preservative in the adhesive B of the comparative group 5 contained only dogwood extract and artemisia argyi extract.
1. The environment-friendly effect is as follows:
in examples 1 to 3 and in controls 1 to 5, no formaldehyde was detected.
2. The detection results of the bamboo strip plate are shown in the following table 1:
TABLE 1
As can be seen from Table 1, the water contents of the bamboo chips in the examples 1 to 3 are all lower than 15%, the bamboo chips have better water contents and proper water contents, and the quality of the bamboo chips cannot be influenced by overhigh or overlow water contents; compared with the control groups 1 to 3, the embodiment 1 shows that the bamboo chip board can be smooth and flat, the splicing is tight, the bamboo chip board is not easy to split, and the quality of the bamboo chip board is high by adopting the adhesive which is composed of chitosan, konjac chitosan, lysozyme, fish glue protein, montmorillonite, salicylic acid and potassium dichromate and is pre-pressed after coating. As can be seen from example 1 compared with the control groups 4 to 5, the durability of the bamboo sheet board is improved by adding the walnut shell wood vinegar, the dogwood extract and the folium artemisiae argyi extract into the adhesive, and the bamboo sheet board is not easy to crack and has long adhesion.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (7)
1. A method for manufacturing a formaldehyde-free bamboo chip board comprises the steps of heat treatment, bamboo chip manufacturing, drying, repairing, primary gluing, assembly, prepressing, secondary gluing, hot pressing, cooling, edge cutting and polishing, and is characterized in that:
the heat treatment process comprises the following steps: placing the bamboo in hot steam for heat preservation for 3-5 h;
the drying conditions are as follows: placing the bamboo chips in a dryer with the relative air humidity of 10-20%, drying at the temperature of 40-50 ℃ and the wind speed of 10-20 m/s until the moisture percentage content of the bamboo chips is 15-23%;
the one-step gluing process comprises the step of coating an adhesive A on the surface of a bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive A is 100-200 g/m2(ii) a The adhesive A comprises the following raw materials in parts by mass: 20-30 parts of chitosan, 10-30 parts of konjac chitosan, 1-4 parts of lysozyme, 40-50 parts of fish glue protein, 5-10 parts of montmorillonite, 1-5 parts of salicylic acid and 1-6 parts of potassium dichromate;
the prepressing process comprises the steps of standing the assembled bamboo chips for 10-20 min, and prepressing at 0-5 ℃ for 10-20 min, wherein the prepressing pressure is 0.5-1.0 Mpa;
the secondary gluing process comprises the step of coating an adhesive B on the surface of the bamboo chip to form an adhesive layer, wherein the coating weight of the adhesive B is 450-500 g/m2(ii) a The adhesive B comprises the following raw materials in parts by mass: 15-20 parts of konjac glucomannan, 8-13 parts of chitosan, 3-5 parts of urea, 4-8 parts of guanidine hydrochloride, 10-15 parts of soybean protein, 20-24 parts of bone glue, 0.1-3 parts of sodium acetate, 1-3 parts of glycerol and 0.1-2 parts of preservative;
the hot pressing process comprises the following steps: and (3) pressing the pre-pressed bamboo chips at the temperature of 80-85 ℃ for 2-3 min by adopting the pressure of 1.0-1.5 Mpa.
2. The method for manufacturing the formaldehyde-free bamboo chip board as claimed in claim 1, wherein the fiber included angle of the two wood boards in the assembly process is 90 degrees, and the number of assembly layers is odd.
3. The method for manufacturing the formaldehyde-free bamboo chip board as claimed in claim 1, wherein the adhesive B is prepared by the following method: dissolving soybean protein and bone glue in 1-2% by mass of a hydroxide solution, adding urea and guanidine hydrochloride, placing the mixture in a stirring kettle, stirring the mixture for 25-30 min at a rotating speed of 200-300 r/min, adding konjac glucomannan and chitosan, and stirring the mixture for 5-10 min at a rotating speed of 100-150 r/min; and then adding sodium acetate, glycerol and a preservative, and uniformly stirring to obtain the adhesive.
4. The method for manufacturing the formaldehyde-free bamboo chip board as claimed in claim 1, wherein the preservative comprises walnut shell wood vinegar, dogwood extract and argyi leaf extract.
5. The method for manufacturing the formaldehyde-free bamboo chip board as claimed in claim 4, wherein the extract of dogwood is obtained by extracting the following steps: crushing dogwood, placing the crushed dogwood in a supercritical carbon dioxide extraction kettle, and extracting for 50-60 min by using an entrainer which is a mixture of ethyl acetate and ethanol in a mass ratio of 1: 3-6 to obtain the dogwood extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 27-34 ℃, the extraction pressure is 45Mpa, and the flow rate of carbon dioxide is 8 Kg/h.
6. The method for manufacturing the formaldehyde-free bamboo chip board as claimed in claim 4, wherein the folium artemisiae argyi extract is prepared by the following steps: crushing folium artemisiae argyi, putting the crushed folium artemisiae argyi into a supercritical carbon dioxide extraction kettle, and extracting for 20-25 min by using tetrachloromethane as an entrainer to obtain the folium artemisiae argyi extract; the supercritical carbon dioxide extraction conditions are as follows: the extraction temperature is 30-40 ℃, the extraction pressure is 40Mpa, and the flow rate of carbon dioxide is 4 Kg/h.
7. The method for manufacturing the formaldehyde-free bamboo chip board as claimed in claim 4, wherein the walnut shell wood vinegar is extracted by the following method: placing the walnut shells in a charcoal kiln for heating and dry distillation, heating up and pyrolyzing at a heating rate of 20-50 ℃/h, heating up to 300-350 ℃, preserving heat for 1-2 h, and collecting distillate to obtain walnut kernel wood vinegar.
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