CN110978160A - Recombined bamboo skin veneer plywood and preparation method thereof - Google Patents
Recombined bamboo skin veneer plywood and preparation method thereof Download PDFInfo
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- CN110978160A CN110978160A CN201911320935.7A CN201911320935A CN110978160A CN 110978160 A CN110978160 A CN 110978160A CN 201911320935 A CN201911320935 A CN 201911320935A CN 110978160 A CN110978160 A CN 110978160A
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- 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
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- 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
- B27D1/06—Manufacture of central layers; Form of central layers
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- 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
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J1/00—Mechanical working of cane or the like
-
- 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
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
A recombined bamboo skin veneer plywood is a slab formed by gluing 3, 5, 7 or 9 criss-cross wood veneers by applying an adhesive, wherein a layer of recombined bamboo skin is respectively glued on two sides of the slab, and each layer of recombined bamboo skin is formed by splicing 2 or 3 pieces of bamboo skins; the total thickness of the plate blank of the plywood is 3-18mm, the veneers forming the plywood are non-equal-thickness veneers, the thickness of the central layer veneer is 1.3-2.5 times that of the veneers of other layers, and the thicknesses of the veneers of other layers are the same; the recombined bamboo skin veneer plywood uses negative ion powder coating to carry out surface electrostatic spraying.
Description
Technical Field
The invention belongs to the field of artificial boards and decorative materials, and particularly relates to a recombined bamboo skin veneer plywood and a preparation method thereof.
Background
In 2018, the total yield of artificial boards in China is 29909 ten thousand meters3The growth rate is 1.43 percent compared with 2017. Wherein: plywood 17898 ten thousand meters36168 km of fiberboard3Shaving board 2732 ten thousand meters33111 ten thousand meters of other artificial boards3(the laminated wood board accounts for 53 percent), and the plywood is the variety with the largest yield in the artificial board categories in China. The plywood mainly uses fast-growing forest wood such as eucalyptus, poplar and malachite as main raw materials, a large amount of wood resources are consumed, and a large amount of wood such as the malachite is imported from China every year as the raw materials of the plywood. Meanwhile, the use of the bamboo wood by the plywood is very little, the bamboo wood is a forest resource which grows rapidly, is updated rapidly, and keeps excellent water and soil ecological benefits, the bamboo wood becomes a timber after 5-6 years of growth, and the bamboo forest is degraded if the bamboo wood is not harvested in time. Because the added value of the existing bamboo products is limited and the consumption of the existing bamboo products is not large in some areas, the enthusiasm of forest growers for cutting the bamboo is not high, the bamboo forest is declined in the past, and the economic benefit and the ecological benefit of the bamboo forest are reduced. Therefore, in recent years, China vigorously advocates the development of the bamboo industry, for example, Hunan province proposes the strategic target of 'billions of industries' for manufacturing bamboo. Aiming at the contradiction problems that the wood resource is in shortage and the bamboo resource is not utilized with high added value due to the consumption of a large amount of wood resources in the industry of artificial boards, the solution of realizing the high-efficiency and high-value benefit of the bamboo resource is urgently neededThe artificial board product is made of bamboo instead of wood.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a recombined bamboo skin veneer plywood and a preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a recombined bamboo skin veneer plywood is a slab formed by gluing 3, 5, 7 or 9 criss-cross wood veneers by applying an adhesive, wherein a layer of recombined bamboo skin is respectively glued on two sides of the slab, and each layer of recombined bamboo skin is formed by splicing 2 or 3 pieces of bamboo skins; the total thickness of the plate blank of the plywood is 3-18mm, the veneers forming the plywood are non-equal-thickness veneers, the thickness of the central layer veneer is 1.3-2.5 times that of the veneers of other layers, and the thicknesses of the veneers of other layers are the same; the recombined bamboo skin veneer plywood uses negative ion powder coating to carry out surface electrostatic spraying.
Furthermore, the recombined bamboo skin is a bamboo purlin formed by side splicing and gluing of a whole bamboo board and is sliced into the bamboo skin with the thickness of 0.15-0.5mm, the width of the bamboo skin is 430mm or 640mm, and the moisture content of the dried bamboo skin is 4-8%.
A preparation method of the recombined bamboo skin veneer comprises the following steps:
step one, manufacturing a plate blank: the plywood which is formed by gluing 3 layers, 5 layers, 7 layers or 9 layers of criss-cross wood veneers by applying an adhesive is a plate blank; the total thickness of the plate blank of the plywood is 3-18mm, the veneers forming the plywood are non-equal-thickness veneers, the thickness of the central layer veneer is 1.3-2.5 times that of the veneers of other layers, and the thicknesses of the veneers of other layers are the same;
step two, manufacturing the recombined bamboo skin: adhering a layer of recombined bamboo skin to each surface of the plate blank, wherein each layer of recombined bamboo skin is formed by splicing 2 or 3 pieces of bamboo skins;
step three, surface spraying: the recombined bamboo skin veneer plywood uses negative ion powder coating to carry out surface electrostatic spraying.
Furthermore, the recombined bamboo skin is a bamboo purlin formed by side splicing and gluing of a whole bamboo board and is sliced into the bamboo skin with the thickness of 0.15-0.5mm, the width of the bamboo skin is 430mm or 640mm, and the moisture content of the dried bamboo skin is 4-8%.
Further, the third step is specifically: and (3) performing surface electrostatic spraying on the recombined bamboo skin veneer by using a negative ion powder coating, wherein the negative ion powder coating is obtained by adding 0.1-5% of nanoscale tourmaline powder by mass into thermosetting powder coating and uniformly dispersing.
Further, the preparation method of the bamboo purlin specifically comprises the following steps:
the semicircular bamboo tube is flattened into a whole bamboo board after being softened by boiling in hot water, the whole bamboo board is subjected to side splicing under normal temperature by adopting isocyanate adhesive under pressurization to obtain a bamboo purlin with the width of 430mm or 640mm, the blanks among the whole bamboo board are sorted and combined in a mode of consistent inner cambered surface direction, and the bamboo purlin is preheated for 0.5 to 2 hours in a hydrothermal environment at the temperature of between 60 and 85 ℃ before being sliced.
Compared with the prior art, the invention has the beneficial effects that:
1. the bamboo skin is prepared by slicing glued bamboo beams of a whole bamboo board obtained by cooking and softening a semicircular bamboo tube, and has the advantages of simple process and resource saving compared with the wood skin obtained by slicing glued and integrated bamboo beams processed into bamboo strips. The whole bamboo board prepared by the bamboo tube under the hydrothermal condition can be pressed and glued by isocyanate at normal temperature without adding a drying procedure, so that the production process can be simplified.
2. The nanoscale tourmaline powder has the negative ion generation function, plays a role in mildew resistance on bamboo skins, and is sprayed on the surface together with spraying, so that the functionality of the product is improved. The electrostatic spraying has no wastewater discharge, and the production process has the advantage of environmental protection.
3. The veneer of the plywood is a non-equal-thickness veneer, the thickness of the central layer veneer is 1.3-2.5 times that of the other layers of veneers, the effective reinforcing effect can be achieved, and the dimensional stability of the board can be kept.
Drawings
FIG. 1 is a schematic view of the process of making the integrated bamboo board of the present invention.
Fig. 2 is a schematic view of the manufacturing process of the recombined bamboo skin of the invention.
FIG. 3 is a schematic view of the structure of the recombined bamboo skin veneer.
Wherein: 1-bamboo tube, 2-semicircular bamboo tube and 3-whole bamboo board. 4-bamboo purlin, 5-recombined bamboo skin and 6-veneer slicer. 7-plywood blank and 8-recombined bamboo skin veneer.
Detailed Description
The technical scheme of the invention is further described in detail by combining the drawings and the detailed implementation mode:
as shown in fig. 1 to 3, example 1:
1. preparing a slab of plywood: the method comprises the following steps of taking eucalyptus veneers with the thickness of 2.2m as a central layer of a plywood, applying urea-formaldehyde resin on two surfaces of the central layer, respectively pressing a layer of eucalyptus veneers with the thickness of 1.7mm on the two surfaces, and carrying out hot pressing to obtain 3 layers of plywood slabs 7 with a criss-cross structure and the length and width of 2550x1260 mm;
2. preparing a bamboo purlin: selecting bamboo with two uniform ends, cutting bamboo tubes 1 with the length of 2550mm, splitting each bamboo tube 1 from the middle into 2 semicircular bamboo tubes 2, removing inner knots of the semicircular bamboo tubes 2, performing hot water cooking softening, flattening into whole bamboo boards with the length of 2550mm, performing pressurization side splicing between the whole bamboo boards 3 by adopting isocyanate adhesive at normal temperature to obtain bamboo purlins 4 with the width of 430mm, and sequencing and combining the assembly between the whole bamboo boards according to the mode that the directions of inner cambered surfaces are consistent.
3. Preparing bamboo skin: preheating bamboo purlin for 0.5 hour in a 60 ℃ hydrothermal environment, slicing the bamboo purlin in a slicing machine 6, taking the whole bamboo board side pressure surface of the bamboo purlin as a slicing surface, wherein the slicing thickness is 0.3mm, obtaining a bamboo skin with side pressure stripes and the length and width dimension of 2550x430mm, drying the bamboo skin through a mesh belt dryer to obtain a recombined bamboo skin with the water content of 4-8%, and cutting edges of two sides of the bamboo skin to obtain the width of 420 mm.
4. And (3) preparing the recombined bamboo skin veneer board, namely applying urea-formaldehyde resin on two surfaces of a plywood slab, respectively and parallelly attaching 3 recombined bamboo skins 5 with the size of 2550x420mm in the width direction of the two surfaces of the slab, completely covering the board surface by the 3 recombined bamboo skins, and performing hot pressing to obtain the recombined bamboo skin veneer board 8.
5. And (3) spraying the surface of the recombined bamboo skin veneer plywood: adding 3% of nanoscale tourmaline powder into the thermosetting powder coating, uniformly mixing, and spraying the powder coating on the upper and lower surfaces of the recombined bamboo skin veneer surface veneer in an electrostatic spraying manner to obtain the well-sprayed recombined bamboo skin veneer surface veneer.
Example 2:
1. preparing a slab of plywood: the method comprises the following steps of taking eucalyptus veneers with the thickness of 2.6m as a central layer of a plywood, pressing and pasting two eucalyptus veneers with the thickness of 1.7mm on two surfaces of the central layer respectively, enabling wood grain directions of the veneers of each layer to be vertical to each other, applying urea resin in the middle, and carrying out hot pressing to obtain 5 layers of plywood slabs with the length and width of 2550x1260mm in a criss-cross structure;
2. preparing a bamboo purlin: selecting bamboo with two uniform ends, cutting bamboo tubes with the length of 2550mm, splitting each bamboo tube into 2 semicircular bamboo tubes from the middle, removing inner knots of the semicircular bamboo tubes, softening the semicircular bamboo tubes through hot water cooking, flattening the semicircular bamboo tubes into whole bamboo boards with the length of 2550mm, performing side splicing between the whole bamboo boards by adopting isocyanate adhesive under normal temperature under pressurization to obtain bamboo beams with the width of 640mm, and sequencing and combining the blanks between the whole bamboo boards in a mode that the directions of inner cambered surfaces are consistent.
3. Preparing bamboo skin: preheating bamboo purlin for 1 hour in a 65 ℃ hydrothermal environment, slicing the bamboo purlin in a slicing machine, taking the side pressure surface of the whole bamboo board of the bamboo purlin as a slicing surface, wherein the slicing thickness is 0.4mm, obtaining a bamboo skin with side pressure stripes and the length and width dimension of 2550x640mm, drying the bamboo skin through a mesh belt dryer to obtain the bamboo skin with the water content of 4-8%, and cutting the edges of two sides of the bamboo skin to obtain the width of 630 mm.
4. The method for preparing the recombined bamboo skin veneer comprises the steps of applying urea-formaldehyde resin on two surfaces of a veneer blank, respectively and parallelly attaching 2 pieces of bamboo skins with the size of 2550x630mm in the width direction of the two surfaces of the veneer blank, completely covering the surfaces of the veneers by the 2 pieces of bamboo skins, and performing hot pressing to obtain the recombined bamboo skin veneer.
5. And (3) spraying the surface of the recombined bamboo skin veneer plywood: adding 3% of nanoscale tourmaline powder into the thermosetting powder coating, uniformly mixing, and spraying the powder coating on the upper and lower surfaces of the recombined bamboo skin veneer surface veneer in an electrostatic spraying manner to obtain the well-sprayed recombined bamboo skin veneer surface veneer.
The recombined bamboo skin veneer plywood prepared in the embodiment 1 and the embodiment 2 has the following performance indexes through detection, and has good dimensional stability.
| Detecting the index | Degree of warp | Surface bonding strength | Concentration of negative ions |
| Example 1 | 0.2％ | 0.9MPa | 513ions/(s·cm2) |
| Example 2 | 0.1％ | 0.85MPa | 522ions/(s·cm2) |
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (6)
1. The recombined bamboo skin veneer is characterized in that the recombined bamboo skin veneer is a plate blank which is formed by gluing 3 layers, 5 layers, 7 layers or 9 layers of criss-cross wooden veneers by applying an adhesive, a layer of recombined bamboo skin is respectively glued on two surfaces of the plate blank, and each layer of recombined bamboo skin is formed by splicing 2 or 3 pieces of bamboo skins; the total thickness of the plate blank of the plywood is 3-18mm, the veneers forming the plywood are non-equal-thickness veneers, the thickness of the central layer veneer is 1.3-2.5 times that of the veneers of other layers, and the thicknesses of the veneers of other layers are the same; the recombined bamboo skin veneer plywood uses negative ion powder coating to carry out surface electrostatic spraying.
2. The recombined bamboo skin-faced plywood as claimed in claim 1, wherein the recombined bamboo skin is a bamboo skin sliced from a whole bamboo board through side splicing and gluing into bamboo skin with the thickness of 0.15-0.5mm, the width of the bamboo skin is 430mm or 640mm, and the moisture content of the dried bamboo skin is 4-8%.
3. A preparation method of a recombined bamboo skin veneer plywood is characterized by comprising the following steps: the method comprises the following steps:
step one, manufacturing a plate blank: the plywood which is formed by gluing 3 layers, 5 layers, 7 layers or 9 layers of criss-cross wood veneers by applying an adhesive is a plate blank; the total thickness of the plate blank of the plywood is 3-18mm, the veneers forming the plywood are non-equal-thickness veneers, the thickness of the central layer veneer is 1.3-2.5 times that of the veneers of other layers, and the thicknesses of the veneers of other layers are the same;
step two, manufacturing the recombined bamboo skin: adhering a layer of recombined bamboo skin to each surface of the plate blank, wherein each layer of recombined bamboo skin is formed by splicing 2 or 3 pieces of bamboo skins;
step three, surface spraying: the recombined bamboo skin veneer plywood uses negative ion powder coating to carry out surface electrostatic spraying.
4. The production method according to claim 3, characterized in that: the recombined bamboo skin is formed by slicing a bamboo purlin formed by splicing and gluing whole bamboo boards into bamboo skins with the thickness of 0.15-0.5mm, the width of the bamboo skins is 430mm or 640mm, and the water content of the dried bamboo skins is 4-8%.
5. The preparation method according to claim 3, wherein the third step is specifically: and (3) performing surface electrostatic spraying on the recombined bamboo skin veneer by using a negative ion powder coating, wherein the negative ion powder coating is obtained by adding 0.1-5% of nanoscale tourmaline powder by mass into thermosetting powder coating and uniformly dispersing.
6. The method of claim 4, wherein: the preparation method of the bamboo purlin specifically comprises the following steps:
the semicircular bamboo tube is flattened into a whole bamboo board after being softened by boiling in hot water, the whole bamboo board is subjected to side splicing under normal temperature by adopting isocyanate adhesive under pressurization to obtain a bamboo purlin with the width of 430mm or 640mm, the blanks among the whole bamboo board are sorted and combined in a mode of consistent inner cambered surface direction, and the bamboo purlin is preheated for 0.5 to 2 hours in a hydrothermal environment at the temperature of between 60 and 85 ℃ before being sliced.
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| CN201911320935.7A CN110978160A (en) | 2019-12-19 | 2019-12-19 | Recombined bamboo skin veneer plywood and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112518913A (en) * | 2020-11-25 | 2021-03-19 | 烟台博海木工机械有限公司 | Processing method of bamboo-wood composite board and bamboo-wood composite board |
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| CN2504058Y (en) * | 2001-11-23 | 2002-08-07 | 德清县莫干山包装有限公司 | Planning cutting bamboo sheet by spreading whole bamboo |
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