CN117532697A - Bamboo oriented strand board with high internal bonding strength and manufacturing process thereof - Google Patents
Bamboo oriented strand board with high internal bonding strength and manufacturing process thereof Download PDFInfo
- Publication number
- CN117532697A CN117532697A CN202311511556.2A CN202311511556A CN117532697A CN 117532697 A CN117532697 A CN 117532697A CN 202311511556 A CN202311511556 A CN 202311511556A CN 117532697 A CN117532697 A CN 117532697A
- Authority
- CN
- China
- Prior art keywords
- bamboo
- oriented strand
- transition layer
- strand board
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 166
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 166
- 241001330002 Bambuseae Species 0.000 title claims abstract description 166
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 166
- 239000011425 bamboo Substances 0.000 title claims abstract description 166
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 96
- 239000002023 wood Substances 0.000 claims abstract description 48
- 239000000835 fiber Substances 0.000 claims abstract description 21
- 239000000853 adhesive Substances 0.000 claims description 55
- 230000001070 adhesive effect Effects 0.000 claims description 55
- 239000000123 paper Substances 0.000 claims description 28
- 238000005507 spraying Methods 0.000 claims description 14
- 239000002655 kraft paper Substances 0.000 claims description 11
- 238000007731 hot pressing Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 229920003235 aromatic polyamide Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000002028 Biomass Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 239000003292 glue Substances 0.000 description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 239000005011 phenolic resin Substances 0.000 description 6
- 229920001568 phenolic resin Polymers 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000012948 isocyanate Substances 0.000 description 5
- 150000002513 isocyanates Chemical class 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/06—Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/06—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention belongs to the field of oriented strand boards, and particularly relates to a bamboo oriented strand board with high internal bonding strength and a manufacturing process thereof, which solve the problem of weak interface bonding between layers. The bamboo oriented strand board with high internal bonding strength comprises a plurality of bamboo oriented strand layers paved in a superposition manner, wherein a paper or fiber transition layer is arranged between every two adjacent bamboo oriented strand layers, and the bamboo oriented strand layers and the transition layer are fixedly glued to form microstructure interlocking. The effect of high interfacial bonding strength between the oriented wood shaving layers of the bamboo and good strength performance of the plate is realized.
Description
Technical Field
The invention belongs to the field of oriented strand boards, and particularly relates to a bamboo oriented strand board with high internal bonding strength and a manufacturing process thereof.
Background
The oriented strand board is an artificial board formed by oriented pavement of bamboo shavings, and has the advantages of renewable raw materials, simple and convenient processing, high strength and good comprehensive performance.
The bamboo oriented strand board generally adopts a paving mode of 3 layers, 5 layers or 7 layers and other odd layers in a transverse and longitudinal staggered manner, and because bamboo shavings can be torn to generate a large number of tattoos, namely 'key grooves', the thicker the shavings are, the deeper the key grooves are, the lower the bonding between longitudinal fibers and transverse fibers is caused when transverse and longitudinal interfaces are intersected, the interface bonding strength is poor, and the bamboo oriented strand board becomes a weak point, influences the bonding strength in the bamboo oriented strand board, and influences the integral strength performance of the board.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a bamboo oriented strand board with high internal bonding strength.
Another object of the present invention is to provide a process for manufacturing oriented strand boards of bamboo with high internal bond strength, which solves the above problems of the prior art.
The aim of the invention can be achieved by the following technical scheme: the bamboo oriented strand board with high internal bonding strength comprises a plurality of bamboo oriented strand boards paved in a superposition manner, wherein a paper or fiber transition layer is arranged between every two adjacent bamboo oriented strand boards, and the bamboo oriented strand boards and the transition layer are fixedly glued to form microstructure interlocking.
The bamboo oriented strand board with high internal bonding strength is laid in a superposition way through the bamboo oriented strand layer, the transition layer and the bamboo oriented strand layer, and the transition layer is of a paper or fiber structure and can adapt to the deformation of the extrusion bonding surface grains after being extruded. After paving, especially after hot pressing, the transition layer can fill the keyway holes on the surface of the bamboo wood directional shaving layer well, and the transition layer and the bamboo wood directional shaving layer are bonded through adhesive, so that microstructure interlocking is formed between the transition layer and the bamboo wood directional shaving layer, the interface bonding strength is improved, the overall cohesive force is enhanced, and the overall strength performance of the board is optimized.
In the bamboo oriented strand board with high internal bonding strength, the transition layer comprises one or more of kraft paper, special paper, bamboo pulp fiber, bond paper and biomass crushed aggregates.
Kraft paper, special paper, bamboo pulp fiber, bond paper and biomass crushed aggregates have flexible and firm properties, can adapt to the extrusion surface after being extruded, can be effectively filled into the pits of the bamboo directional shaving layer, and have better strength in the thickness direction.
As optimization, the transition layer is kraft paper or special paper.
Preferably, the special paper is polyaramid fiber paper.
As another alternative material of the transition layer, the transition layer is a material impregnated with an adhesive.
The transition layer is impregnated by the adhesive, so that the transition layer fully absorbs the adhesive, after paving and overlapping, particularly after being pressed, good bonding is realized between the inside and the surface of the transition layer and between the surface of the transition layer and the bamboo oriented wood shaving layer, and meanwhile, the adhesive can be filled into the pits along with the transition layer, so that the interface bonding strength between the bamboo oriented wood shaving layer and the transition layer is increased. Specifically, kraft paper, bamboo pulp fiber, adhesive film paper impregnated with phenolic resin, crushed aggregates and the like after being impregnated with the adhesive can be used.
In the bamboo oriented strand board with high internal bonding strength, the adhesive comprises an expanding Kong Jiaonian agent.
The expansion Kong Jiaonian agent can play a role of expanding holes, and is expanded and solidified after deep filling of the pits and the gaps of the wood shavings, so that the adhesive force between the wood shavings and the pits and the gaps is larger, the bonding strength between the transition layer and the bamboo oriented wood shavings layer is enhanced, and isocyanate adhesive can be selected as the expansion Kong Jiaonian agent for specific optimization.
In the bamboo oriented strand board with high internal bonding strength, the bamboo oriented strand board layer is formed by paving bamboo strands in an oriented mode, and the bamboo strands do not contain green.
The bamboo shavings are directionally paved in a head-to-tail lap joint mode, so that the strength of the bamboo directional shavings layer in the length direction or the width direction is consistent. The bamboo green has smooth surface and is not easy to connect, and after the bamboo green is removed, the inner part is provided with key groove lines, so that the transition layer is convenient to be connected with the key groove lines in a good gluing way, and the bonding strength is improved.
The bamboo oriented strand board with high internal bonding strength sequentially comprises a bamboo oriented strand board layer, a transition layer, a bamboo oriented strand board layer, a transition layer and a bamboo oriented strand board layer; and the adjacent bamboo wood directional shaving layers are paved in a transverse and longitudinal staggered manner.
The bamboo wood directional shaving layers are staggered horizontally and longitudinally, so that the plate has good bending resistance in the transverse direction and the longitudinal direction, and in addition, the lines of opposite surfaces between the adjacent bamboo wood directional shaving layers are staggered, and the bonding strength is higher after the transition layer is filled. In a specific paving sequence, a bamboo directional wood shaving layer, a transition layer and a bamboo directional wood shaving layer are adopted, the bamboo directional wood shaving layer is arranged at the outermost side in an alternate paving mode, 5 bamboo directional wood shaving layers in total can be paved as optimization, and 4 transition layers are selected to have proper thickness and better strength, and of course, the specific paving layer number can be properly customized and adjusted according to actual conditions.
As optimization, the surface of the bamboo directional shaving layer is sprayed with an adhesive through an atomization glue spraying system.
The adhesive is sprayed on the surface of the bamboo directional wood shaving layer, so that the adhesive is favorably adhered to the transition layer, the adhesive spraying system is atomized to enable the adhesive to be more uniform, the sprayed adhesive is smaller in form and easier to enter the pits and gaps, and the generation of bubbles between the adhesive and an adhered plane is reduced.
In the bamboo oriented strand board with high internal bonding strength, the bamboo oriented strand board layer and the transition layer are sequentially laminated and paved, and then are formed into an integrated structure through hot pressing.
The transition layer and the adhesive are fully filled into the clearance holes of the bamboo directional shaving layer by hot press molding, so that the whole plate is integrated, and the strength performance is improved.
As optimization, the number of the bamboo oriented shaving layers is an even number, so that the strength direction of the bamboo oriented shaving layers at the outermost layer is consistent, and the transverse and vertical directions of the plate can be better adjusted in specific use.
The manufacturing process of the bamboo oriented strand board with high internal bonding strength comprises the following steps:
s1, preparing bamboo shavings from the bamboo with the green removed, and spraying adhesive on the bamboo shavings;
s2, placing the transition layer in an adhesive for dipping, or spraying the adhesive on the transition layer;
s3, paving the bamboo shavings, the transition layer and the bamboo shavings in sequence according to a preset sequence;
s4, hot press molding.
In the step S2, a gluing mode is selected by the specific types of the adhesive and the transition layer material, for example, when phenolic resin is selected, a dipping mode can be adopted, so that the transition layer fully absorbs and adheres to the adhesive, and the bonding effect is good; when the isocyanate glue is selected, the spraying mode is suitable, and the atomization glue spraying system can be used for spraying, so that the glue is uniformly sized, the glue sizing amount is conveniently controlled, and excessive glue sizing is prevented.
In the above manufacturing process of the bamboo oriented strand board with high internal bonding strength, in the step S3, the hot pressing temperature is 180-200 ℃, the hot pressing time is 5-15min, and the hot pressing pressure is 2-5MPa.
Compared with the prior art, the invention has the following advantages:
1. the bamboo oriented strand board with high internal bonding strength is laid in a superposition way through the bamboo oriented strand layer, the transition layer and the bamboo oriented strand layer, and the transition layer is of a paper or fiber structure and can adapt to the deformation of the extrusion bonding surface grains after being extruded. After paving, especially after hot pressing, the transition layer can fill the keyway holes on the surface of the bamboo wood directional shaving layer well, and the transition layer and the bamboo wood directional shaving layer are bonded through adhesive, so that microstructure interlocking is formed between the transition layer and the bamboo wood directional shaving layer, the interface bonding strength is improved, the overall cohesive force is enhanced, and the overall strength performance of the board is optimized.
2. Kraft paper, special paper, bamboo pulp fiber, bond paper and biomass crushed aggregates have flexible and firm properties, can adapt along with the extrusion surface after being extruded, can be effectively filled into the pits of the bamboo wood directional wood shaving layer, and the transition layer is impregnated with adhesive, so that the transition layer fully absorbs the adhesive, and after pavement and lamination, particularly after being compressed, good bonding is realized between the inside and the surface of the transition layer and between the surface of the transition layer and the bamboo wood directional wood shaving layer, and meanwhile, the adhesive can be filled into the pits along with the transition layer, so that the interface bonding strength between the bamboo wood directional wood shaving layer and the transition layer is increased.
3. The bamboo green has smooth surface and is not easy to connect, and after the bamboo green is removed, the inner part is provided with key groove lines, so that the transition layer is convenient to be connected with the key groove lines in a good gluing way, and the bonding strength is improved.
4. The adhesive is sprayed on the surface of the bamboo directional wood shaving layer, so that the adhesive is favorably adhered to the transition layer, the adhesive spraying system is atomized to enable the adhesive to be more uniform, the sprayed adhesive is smaller in form and easier to enter the pits and gaps, and the generation of bubbles between the adhesive and an adhered plane is reduced.
5. The expansion Kong Jiaonian agent can play a role of expanding holes, and is expanded and solidified after deep filling of the pits and the gaps of the wood shavings, so that the adhesive force between the wood shavings and the pits and the gaps is larger, and the bonding strength between the transition layer and the bamboo oriented wood shavings layer is enhanced.
Drawings
FIG. 1 is a schematic view of the separation of the layers of the bamboo oriented strand board with high internal bond strength provided by the invention;
FIG. 2 is a flow chart of the process for manufacturing the bamboo oriented strand board with high internal bond strength (examples 1, 2, 3, 5);
fig. 3 is a flowchart of the process for manufacturing the oriented strand board with high internal bond strength provided by the invention (example 4).
In the figure, a bamboo oriented wood shaving layer 1, bamboo shavings 2 and a transition layer 3 are shown.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
Specific embodiment is shown in fig. 1, and this bamboo timber oriented strand board that internal bond strength is high includes a plurality of coincide bamboo timber oriented strand board layers 1 of mating formation, is equipped with paper or fibre transition layer 3 between the adjacent bamboo timber oriented strand board layer 1, glues fixedly between bamboo timber oriented strand board layer 1 and the transition layer 3 and forms the microstructure interlocking.
Specifically, the bamboo oriented strand board with high internal bonding strength is laid in a superposition way through the bamboo oriented strand layer 1, the transition layer 3 and the bamboo oriented strand layer 1, and the transition layer 3 is of a paper or fiber structure and can adapt to the deformation of the extrusion bonding surface grains after being extruded. After paving, especially after hot pressing, the transition layer 3 can well fill key slot holes on the surface of the bamboo oriented wood shaving layer 1, and the layers are bonded by adhesive, so that microstructure interlocking is formed between the transition layer 3 and the bamboo oriented wood shaving layer 1, the interface bonding strength is improved, the overall cohesive force is enhanced, and the overall strength performance of the board is optimized.
In this example 80g kraft paper was used as the transition layer 3 and fully impregnated with adhesive prior to use. The surface of the bamboo directional shaving layer 1 is sprayed with an adhesive through an atomization glue spraying system. The adhesive is an expanding Kong Jiaonian agent, and in this embodiment, isocyanate adhesive is specifically used.
In other words, kraft paper has the property of being flexible and firm, can adapt to the shape of the extrusion surface after being extruded, can be effectively filled into the pits of the oriented strand layer 1 of bamboo wood, and has better strength in the thickness direction. The transition layer 3 is impregnated by the adhesive, so that the transition layer 3 fully absorbs the adhesive, after pavement and lamination, especially after compaction, good adhesion is realized between the inside and the surface of the transition layer 3 and between the surface of the transition layer 3 and the bamboo oriented wood shaving layer 1, and meanwhile, the adhesive can be filled into the pits along with the transition layer 3, so that the interface bonding strength between the bamboo oriented wood shaving layer 1 and the transition layer 3 is increased. The adhesive is sprayed on the surface of the bamboo directional shaving layer 1, so that the adhesive is favorably adhered to the transition layer 3, the adhesive spraying system is atomized to enable the adhesive to be more uniform, the sprayed adhesive is smaller in form and easier to enter the pits and gaps, and the generation of bubbles between the adhesive and an adhered surface is reduced. The expansion Kong Jiaonian agent can play a role of expanding holes, and is expanded and solidified after deep filling of the pits and the gaps of the wood shavings, so that the adhesive force between the wood shavings and the pits and the gaps is larger, and the bonding strength between the transition layer 3 and the bamboo oriented wood shavings layer 1 is enhanced.
In this embodiment, the bamboo directional shaving layer 1 is formed by directional paving of bamboo shavings 2, and the bamboo shavings 2 need to be removed in advance. The adjacent bamboo oriented wood shaving layers 1 are paved in a transverse and longitudinal staggered manner, and the paving sequence is specifically a bamboo oriented wood shaving layer 1, a transition layer 3, a bamboo oriented wood shaving layer 1, a transition layer 3 and a bamboo oriented wood shaving layer 1.
In other words, the bamboo shavings 2 are directionally paved in an end-to-end lap joint mode, so that the strength of the bamboo directional shavings layer 1 is consistent in the length direction or the width direction. The surface of the bamboo green is smooth and is not easy to connect, and after the bamboo green is removed, the inner side is provided with key groove lines, so that the transition layer 3 is convenient to be connected with the key groove lines in a good gluing way, and the bonding strength is improved. The bamboo wood directional shaving layers 1 are transversely and longitudinally staggered, so that the plate has good bending resistance in the transverse and longitudinal directions, and in addition, the lines of opposite surfaces between the adjacent bamboo wood directional shaving layers 1 are staggered, and the bonding strength of the filled transition layer 3 is higher.
As a specific optimization of this embodiment, the number of layers of the bamboo oriented wood shaving layer 1 is 5, and the number of layers of the transition layer 3 is 4.
As shown in fig. 2, the manufacturing process of the bamboo oriented strand board with high internal bonding strength in this embodiment includes the following steps:
s1, preparing bamboo shavings with the removed green bamboo, wherein the length of the bamboo shavings is 120mm, the width of the bamboo shavings is 200mm, and the thickness of the bamboo shavings is 0.8mm, and spraying isocyanate adhesive on the bamboo shavings;
s2, spraying isocyanate adhesive on the transition layer by using an atomization spray gun;
s3, paving the bamboo shavings (longitudinal paving), the transition layer, the bamboo shavings (transverse paving), the transition layer, the bamboo shavings (longitudinal paving), the transition layer, the bamboo shavings (transverse paving), the transition layer and the bamboo shavings (longitudinal paving) in sequence, wherein the paving thickness is 10cm;
s4, hot press molding, namely, hot press temperature is 190 ℃, hot press time is 10min, and hot press pressure is 3MPa.
Example 2
The bamboo oriented strand board with high internal bonding strength in this embodiment has the same structure as that in embodiment 1, except that: the transition layer adopts polyaramid fiber paper with the thickness of 1 mm.
Example 3
The bamboo oriented strand board with high internal bonding strength in this embodiment has the same structure as that in embodiment 1, except that: the transition layer adopts bamboo pulp fiber with a beating degree of 10 DEG SR.
Example 4
The bamboo oriented strand board with high internal bonding strength in this embodiment has the same structure as that in embodiment 1, except that: the transition layer is made of phenolic resin impregnated bond paper; in the preparation process, in the step S2, the transition layer (bond paper) is immersed in the adhesive (phenolic resin), and the preparation process is shown in fig. 3.
Example 5
The bamboo oriented strand board with high internal bonding strength in this embodiment has the same structure as that in embodiment 1, except that: the transition layer adopts bamboo wood processing crushed aggregates with the mesh number of 10 meshes and the water content of 8 percent.
Comparative example 1
This comparative example, a oriented strand board made of bamboo, was basically the same in structure as in example 1, except that: no transition layer is present.
Comparative example 2
This comparative example, a oriented strand board made of bamboo, was basically the same in structure as in example 1, except that: the transition layer adopts glass fiber cloth.
The physical properties of the bamboo oriented strand boards prepared in examples 1 to 3 and comparative example 1 were tested, and the test results are shown in Table 1 below.
TABLE 1
As can be seen from table 1, when no transition layer was provided in the oriented strand board of bamboo (comparative example 1), the internal bond strength of the strand board was only 0.9MPa, which further resulted in a strand board having lower flexural strength and being more deformable (lower elastic modulus).
When the transition layer is arranged in the bamboo oriented strand board and is made of glass fiber cloth (comparative example 2), although the internal bonding strength, the bending strength and the elastic modulus of the strand board are all improved, the improvement range is smaller, and no obvious benefit is generated to the overall performance improvement of the strand board because the interface bonding strength between the glass fiber cloth and the bamboo oriented strand board layer is insufficient.
When the transition layer is arranged in the oriented strand board of the bamboo, and the transition layer is kraft paper, polyaramid fiber paper, bamboo pulp fiber, phenolic resin impregnated bond paper and bamboo processing crushed aggregates (examples 1-5), compared with comparative example 1, the internal bonding strength, bending strength and elastic modulus of the strand board are improved to different degrees, and especially when the kraft paper, polyaramid fiber paper and phenolic resin impregnated bond paper are used as the transition layer, the internal bonding strength of the strand board is improved to more than 2.0MPa, the bending strength is improved to more than 85MPa, and the elastic modulus is improved to more than 9500MPa, so that the interface bonding strength between the materials and the oriented strand board of the bamboo is higher, and the comprehensive performance of the finished strand board is greatly improved.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The bamboo oriented strand board with high internal bonding strength is characterized by comprising a plurality of bamboo oriented strand boards (1) paved in a superposition manner, wherein a paper or fiber transition layer (3) is arranged between every two adjacent bamboo oriented strand boards (1), and the bamboo oriented strand boards (1) and the transition layer (3) are fixedly glued to form microstructure interlocking.
2. The oriented strand board of claim 1, wherein the transition layer (3) comprises one or more of kraft paper, specialty paper, bamboo pulp fiber, bond paper, and biomass particles.
3. The bamboo oriented strand board with high internal bonding strength according to claim 2, wherein the transition layer (3) is kraft paper or specialty paper.
4. The oriented strand board of claim 2, wherein the specialty paper is polyaramid fiber paper.
5. The bamboo oriented strand board with high internal bonding strength according to claim 1, wherein the transition layer (3) is an adhesive-impregnated material.
6. The oriented strand board of claim 5, wherein the adhesive comprises an expanding Kong Jiaonian agent.
7. The bamboo oriented strand board with high internal bonding strength according to claim 1, wherein the bamboo oriented strand board layer (1) is formed by oriented pavement of bamboo strands (2), and the bamboo strands (2) do not contain green.
8. The bamboo oriented strand board with high internal bonding strength according to claim 1, comprising a bamboo oriented strand board layer (1), a transition layer (3), a bamboo oriented strand board layer (1), a transition layer (3) and a bamboo oriented strand board layer (1) in this order;
and the adjacent bamboo wood directional shaving layers (1) are paved in a transverse and longitudinal staggered mode.
9. A process for manufacturing a bamboo oriented strand board having high internal bond strength as defined in any one of claims 1 to 8, comprising the steps of:
s1, preparing bamboo shavings from the bamboo with the green removed, and spraying adhesive on the bamboo shavings;
s2, placing the transition layer in an adhesive for dipping, or spraying the adhesive on the transition layer;
s3, paving the bamboo shavings, the transition layer and the bamboo shavings in sequence according to a preset sequence;
s4, hot press molding.
10. The process for manufacturing oriented strand board made of bamboo with high internal bonding strength according to claim 9, wherein in the step S3, the hot pressing temperature is 180-200 ℃, the hot pressing time is 5-15min, and the hot pressing pressure is 2-5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311511556.2A CN117532697A (en) | 2023-11-13 | 2023-11-13 | Bamboo oriented strand board with high internal bonding strength and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311511556.2A CN117532697A (en) | 2023-11-13 | 2023-11-13 | Bamboo oriented strand board with high internal bonding strength and manufacturing process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117532697A true CN117532697A (en) | 2024-02-09 |
Family
ID=89795177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311511556.2A Pending CN117532697A (en) | 2023-11-13 | 2023-11-13 | Bamboo oriented strand board with high internal bonding strength and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117532697A (en) |
-
2023
- 2023-11-13 CN CN202311511556.2A patent/CN117532697A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101891047B (en) | Glued laminated bamboo floor and manufacturing method thereof | |
| CN105604312A (en) | Fiber-reinforced building formwork and preparation method thereof | |
| CN110900775A (en) | Composite plywood and manufacturing method thereof | |
| CN204845004U (en) | Novel composite construction's polyurethane sponge | |
| CN117532697A (en) | Bamboo oriented strand board with high internal bonding strength and manufacturing process thereof | |
| CN200961344Y (en) | Wooden composite floor with substrate installed with air hole structure | |
| CN201067935Y (en) | Veneer sheet used for container bottom plate | |
| CN105291491B (en) | For forming the thin plate layer of enhanced cellular structure and the preparation method of honeycomb | |
| CN101725216A (en) | Unsaturated polyester-bonded and glass fiber-reinforced beam and implementation method thereof | |
| CN104760105A (en) | Production method of stable two-layer wood floor | |
| CN209954861U (en) | Ecological plate | |
| CN2445879Y (en) | Bamboo plywood | |
| CN114055587A (en) | Large-scale bamboo integrated engineering material and manufacturing method thereof | |
| CN207711509U (en) | A kind of board | |
| CN113619244A (en) | Novel negative ion formaldehyde-purifying wear-resistant ecological plate | |
| CN103286840B (en) | Oriented strand board boxboard | |
| CN112008814A (en) | Large-size ultra-flat solid wood multilayer board core and production method of multilayer board | |
| CN201228429Y (en) | Bamboo floor block formed by excess material | |
| CN220908994U (en) | Impregnated paper laminated flame-retardant solid wood composite floor | |
| CN201106269Y (en) | Elevation bamboo decorative sheet | |
| CN114888907B (en) | Preparation method of fireproof, waterproof and wear-resistant composite-structure artificial board | |
| CN214137693U (en) | Anti-cracking impregnated bond paper veneer | |
| CN215590169U (en) | PVC foaming board | |
| CN221161752U (en) | Wood veneer | |
| CN209831938U (en) | Bamboo curtain plywood |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |