CN107243975A - A kind of reed-shavings board and preparation method thereof - Google Patents
A kind of reed-shavings board and preparation method thereof Download PDFInfo
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- CN107243975A CN107243975A CN201710532042.3A CN201710532042A CN107243975A CN 107243975 A CN107243975 A CN 107243975A CN 201710532042 A CN201710532042 A CN 201710532042A CN 107243975 A CN107243975 A CN 107243975A
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- reed
- wood shavings
- shavings
- layer
- adhesive
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- 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
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
-
- 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
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- 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
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
Abstract
The present invention relates to a kind of reed-shavings board and preparation method thereof, belong to novel straw Wood-based Panel Production technical field.The present invention sorts its wood shavings according to different size according to the physical characteristic of reed itself, by distributing rationally for top layer wood shavings and sandwich layer wood shavings, obtains the sheet material of excellent in mechanical performance；And by adding poly- polyphenyl polymethylene isocyanates or derivatives thereof environment-protective adhesive so that the environmental protection of sheet material and humidity resistance are increased substantially, it can be good at being applied to the fields such as Furniture manufacturing, indoor and outdoor decoration and packaging material.The present invention regard the waste material produced in reed mechanical grading and pneumatic separation impurity, production process and reed wood shavings hair plates sanding powder as fuel combustion, used for reed particle drying and slab hot pressing energy, considerably reduce production cost, and no solid waste discharge is realized, is conducive to clean manufacturing.
Description
Technical field
The present invention relates to a kind of reed-shavings board and preparation method thereof, belong to novel straw Wood-based Panel Production technical field.
Background technology
China's reed sediment substrate enriches, widely distributed, is annual herb plant, according to statistics the annual reed total amount of current China
About 2,500,000 tons, account for the 6% of Gross World Product.Current reed is in terms of commercial Application mainly as paper making raw material.With timber
The day of resource is becoming tight, and finds timber alternative materials and is paid attention to by more and more extensive.Reed is close due to physicochemical characteristics
In timber and content of cellulose is suitable with timber, therefore wood-based plate can be produced as the alternative materials of timber.However, reed
Performance still has certain difference with timber, and its epidermis is covered with one layer of siliceousization and the higher tissue of resinification degree, conventional urea
Aldehyde, phenolic resin glue are poor to the layer film penetration, it is difficult to form effective glued, therefore production technology and product quality also have one
Determine difference.Therefore, the key technology that wood-based plate is produced by raw material of reed is that the gluing solved between reed and adhesive is asked
Topic, and realize by optimize technique the mass production of high-performance reed lumber.
The content of the invention
The purpose of the present invention is to propose to a kind of reed-shavings board and preparation method thereof, using reed wood shavings as raw material, with poly- many
Phenyl polymethylene isocyanates or derivatives thereof is adhesive, produces particieboard, the particieboard of acquisition can be used for Furniture manufacturing,
Indoor and outdoor decoration and packaging material etc..
Reed-shavings board proposed by the present invention, is made up of layer, sandwich layer and upper epidermis, and upper epidermis, layer are wrapped respectively
Including top layer wood shavings and adhesive, sandwich layer includes sandwich layer wood shavings and adhesive, described upper epidermis and layer thickness deliver as 1~
5mm, top layer wood shavings are screened by 1.4 × 1.4mm mesh and obtained；Core layer thickness is 4~32mm, the length of sandwich layer wood shavings for 15~
35mm, width is 1.5~3mm.
The preparation method of reed-shavings board proposed by the present invention, method comprises the following steps：
(1) reed is rolled and cut, reed section theoretical length about 35mm is obtained, with mechanical grading and pneumatic separation
Reed section is purified, the wet wood shavings of reed are obtained after removing the impurity in reed section, the moisture content for obtaining the wet wood shavings of reed is
15%~20%, the impurity of removal is as fuel, and burning produces heat and used for step (3) and (7)；Impurity includes reed marrow core
With bulrush flower etc., removal of impurity is more than 98%.
(2) the wet wood shavings of the reed of above-mentioned steps (1) are subjected to sizing screening, screen out the qualified reed that thickness is 2~3mm
Wet wood shavings, are not cleaved or the wet wood shavings of the tubular reed that does not cleave completely are removed as fuel, burning produce heat for step (3) and
(7) use；
(3) the wet wood shavings of qualified reed of above-mentioned steps (2) are dried, it is 450~550 DEG C to dry heat medium temperature, is made
Wood shavings moisture content is reduced to 1%~5%, and dry wood shavings are made；Drying institute's calorific requirement can be collected by step (1), (2), (4) and (9)
Waste combustion is provided.
(4) above-mentioned steps (3) dry wood shavings are screened, filter out respectively reed fine powder, top layer wood shavings, sandwich layer wood shavings and
Excessive wood shavings, wherein the reed fine powder filtered out by 0.2 × 0.2mm mesh is used as fuel, burning produces heat and supplies step (3)
(7) use；Top layer wood shavings are obtained by the screening of 1.4 × 1.4mm mesh；Sandwich layer is obtained by the screening of 10.0 × 10.0mm mesh
Wood shavings；Sieve ring type sander broken rear repeat step (4) is not again entered by the excessive wood shavings of 10.0 × 10.0mm mesh；
(5) adhesive, the addition quality of adhesive are separately added into the top layer wood shavings and sandwich layer wood shavings of above-mentioned steps (4)
For：Top layer wood shavings:Adhesive=1:(0.03~0.05), sandwich layer wood shavings:Adhesive=1:(0.03~0.04), described gluing
Agent is the derivative of poly- polyphenyl polymethylene isocyanates or poly- polyphenyl polymethylene isocyanates, and adhesive is at 20 DEG C
Viscosity be 150~250mPas；
(6) top layer wood shavings are divided into upper epidermis wood shavings and layer wood shavings, by layer wood shavings, sandwich layer wood shavings and upper epidermis
Wood shavings are mated formation from the bottom up, make layer thickness be 1~5mm, core layer thickness be 4~32mm, upper epidermis thickness be 1~
5mm, spreading goes out the continuous slab of three-decker, and releasing agent is sprayed respectively on the upper and lower surface of slab, and the quantity for spray of releasing agent is
2~10g/m2, described releasing agent is PPG；
(7) hot pressing is carried out to above-mentioned slab, hot pressing temperature is 200 DEG C, and hot pressing pressure is 2~5N/mm2, hot pressing time is 8
Reed wood shavings hair plates is obtained after~10s/mm, hot pressing；
(8) the reed wood shavings hair plates of above-mentioned steps (7) is subjected to thickness measuring and weighed, be that 6~42mm, density are by thickness
550kg/m3~800kg/m3Qualified reed wood shavings hair plates carry out cooling it is standby, be cooled to 10~50 DEG C；
(9) fixed thick and fine sanding is carried out to qualified reed wood shavings hair plates, by the qualified reed wood shavings hair plates after sanding point
Trimmed size sheet material, i.e. reed-shavings board are cut into, described fixed thick size is 5~41mm；The waste material that is produced in production process and
Sanding powder is used through collecting after-combustion, the heat of generation for step (3) and (7).
Reed-shavings board proposed by the present invention and preparation method thereof, its advantage is：Physics of the invention according to reed itself
Characteristic, its wood shavings is sorted according to different size, by distributing rationally for top layer wood shavings and sandwich layer wood shavings, obtains mechanical property
Excellent sheet material；And by adding poly- polyphenyl polymethylene isocyanates or derivatives thereof environment-protective adhesive so that sheet material
Environmental protection and humidity resistance increase substantially, can be good at being applied to the neck such as Furniture manufacturing, indoor and outdoor decoration and packaging material
Domain.The present invention is by the waste material produced in reed mechanical grading and pneumatic separation impurity, production process and reed wood shavings hair plates sand
Light powder uses for reed particle drying and slab hot pressing energy as fuel combustion, considerably reduces production cost, and in fact
Show without solid waste discharge, be conducive to clean manufacturing.
Brief description of the drawings
Fig. 1 is the structural representation of reed-shavings board proposed by the present invention.
In Fig. 1,1 is upper epidermis, and 2 be sandwich layer, and 3 be layer.
Embodiment
Reed-shavings board proposed by the present invention, its structure as shown in figure 1, the reed-shavings board by layer, sandwich layer and on
Top layer is constituted, and upper epidermis, layer include top layer wood shavings and adhesive respectively, and sandwich layer includes sandwich layer wood shavings and adhesive, described
Upper epidermis and layer thickness deliver as 1~5mm, top layer wood shavings pass through the screening of 1.4 × 1.4mm mesh and obtained；Core layer thickness
For 4~32mm, the length of sandwich layer wood shavings is 15~35mm, and width is 1.5~3mm.
The preparation method of reed-shavings board proposed by the present invention, comprises the following steps：
(1) reed is rolled and cut, reed section theoretical length about 35mm is obtained, with mechanical grading and pneumatic separation
Reed section is purified, the wet wood shavings of reed are obtained after removing the impurity in reed section, the moisture content for obtaining the wet wood shavings of reed is
15%~20%, the impurity of removal is as fuel, and burning produces heat and used for step (3) and (7)；Impurity includes reed marrow core
With bulrush flower etc., removal of impurity is more than 98%.
(2) the wet wood shavings of the reed of above-mentioned steps (1) are subjected to sizing screening, screen out the qualified reed that thickness is 2~3mm
Wet wood shavings, are not cleaved or the wet wood shavings of the tubular reed that does not cleave completely are removed as fuel, burning produce heat for step (3) and
(7) use；
(3) the wet wood shavings of qualified reed of above-mentioned steps (2) are dried, it is 450~550 DEG C to dry heat medium temperature, is made
Wood shavings moisture content is reduced to 1%~5%, and dry wood shavings are made；Drying institute's calorific requirement can be collected by step (1), (2), (4) and (9)
Waste combustion is provided.
(4) above-mentioned steps (3) dry wood shavings are screened, filter out respectively reed fine powder, top layer wood shavings, sandwich layer wood shavings and
Excessive wood shavings, wherein the reed fine powder filtered out by 0.2 × 0.2mm mesh is used as fuel, burning produces heat and supplies step (3)
(7) use；Top layer wood shavings are obtained by the screening of 1.4 × 1.4mm mesh；Sandwich layer is obtained by the screening of 10.0 × 10.0mm mesh
Wood shavings；Sieve ring type sander broken rear repeat step (4) is not again entered by the excessive wood shavings of 10.0 × 10.0mm mesh；
(5) adhesive, the addition quality of adhesive are separately added into the top layer wood shavings and sandwich layer wood shavings of above-mentioned steps (4)
For：Top layer wood shavings:Adhesive=1:(0.03~0.05), sandwich layer wood shavings:Adhesive=1:(0.03~0.04), described gluing
Agent is the derivative of poly- polyphenyl polymethylene isocyanates or poly- polyphenyl polymethylene isocyanates, and adhesive is at 20 DEG C
Viscosity be 150~250mPas；
(6) top layer wood shavings are divided into upper epidermis wood shavings and layer wood shavings, by layer wood shavings, sandwich layer wood shavings and upper epidermis
Wood shavings are mated formation from the bottom up, make layer thickness be 1~5mm, core layer thickness be 4~32mm, upper epidermis thickness be 1~
5mm, spreading goes out the continuous slab of three-decker, and releasing agent is sprayed respectively on the upper and lower surface of slab, and the quantity for spray of releasing agent is
2~10g/m2, described releasing agent is PPG；
(7) hot pressing is carried out to above-mentioned slab, hot pressing temperature is 200 DEG C, and hot pressing pressure is 2~5N/mm2, hot pressing time is 8
Reed wood shavings hair plates is obtained after~10s/mm, hot pressing；
(8) the reed wood shavings hair plates of above-mentioned steps (7) is subjected to thickness measuring and weighed, be that 6~42mm, density are by thickness
550kg/m3~800kg/m3Qualified reed wood shavings hair plates carry out cooling it is standby, be cooled to 10~50 DEG C；
(9) fixed thick and fine sanding is carried out to qualified reed wood shavings hair plates, by the qualified reed wood shavings hair plates after sanding point
Trimmed size sheet material, i.e. reed-shavings board are cut into, described fixed thick size is 5~41mm；The waste material that is produced in production process and
Sanding powder is used through collecting after-combustion, the heat of generation for step (3) and (7).
In order to describe the technology contents of reed-shavings board of the present invention in detail, below in conjunction with embodiment and coordinate accompanying drawing make into
One step explanation.
The reed-shavings board is made up of layer 3, sandwich layer 2 and upper epidermis 1, layer 3, sandwich layer 2 and upper epidermis 1 respectively by
Upper and lower top layer wood shavings and adhesive, sandwich layer wood shavings and adhesive composition；Upper and lower skin depth is 1~5mm, and top layer wood shavings pass through
The screening of 1.4 × 1.4mm mesh is obtained；Core layer thickness is 4~32mm, and the length of sandwich layer wood shavings is 15~35mm, width is 1.5~
3mm.The adhesive used is the derivative of poly- polyphenyl polymethylene isocyanates or poly- polyphenyl polymethylene isocyanates.
Embodiment 1
Reed is rolled and cut, it is about 35mm reeds section to obtain length, with mechanical grading and pneumatic separation to reed
Reed section is purified, and removes in reed section more than 98% impurity, obtains the wet wood shavings of reed that moisture content is 15%.Reed is wet
Wood shavings carry out sizing screening, remove the wet wood shavings of tubular reed for not cleaving or not cleaving completely as fuel, and it is 2 to screen out thickness
~3mm wet the wood shavings of qualified reed.Qualified reed wood shavings are dried, it is 450 DEG C to dry heat medium temperature, makes the moisture content be
5%, dry wood shavings are made, dry wood shavings are sieved using 0.2 × 0.2mm, 1.4 × 1.4mm, 10.0 × 10.0mm three-layer networks hole sizer
Choosing, respectively obtains top layer wood shavings and sandwich layer wood shavings.Poly- polyphenyl polymethylene is separately added into top layer wood shavings and sandwich layer wood shavings
Isocyanates gluing agent (viscosity at 20 DEG C is 150mPas), the addition mass ratio of adhesive is：Top layer wood shavings:Adhesive
=1:0.05, sandwich layer wood shavings:Adhesive=1:0.04.Top layer wood shavings are divided into upper epidermis wood shavings and layer wood shavings, by following table
Layer wood shavings, sandwich layer wood shavings and upper epidermis wood shavings are mated formation from the bottom up, and it is 1mm to make layer thickness, and core layer thickness is 4mm,
Upper epidermis thickness is 1mm, and spreading goes out the continuous slab of three layers of gradual change composite construction, and PPG is sprayed in slab upper and lower surface
Aqueous release agent, the quantity for spray of releasing agent is 2g/m2.Hot pressing is carried out to slab, hot pressing temperature is 200 DEG C, and hot pressing pressure is 2N/
mm2, hot pressing time is to obtain reed wood shavings hair plates after 8s/mm, hot pressing；Then carry out thickness measuring and weighing, by thickness be 6mm, close
Spend for 550kg/m3Qualified reed wood shavings hair plates carry out cooling it is standby, chilling temperature be 10 DEG C.To qualified reed wood shavings hair plates
Fixed thick and fine sanding is carried out, finished product sheet material, i.e. reed-shavings board is then split into.Reed-shavings board burst size of methanal is carried out
Determine, do not detect, meet national standard GB/T18580-2001 E1 levels requirement.
Embodiment 2
Reed is rolled and cut, it is about 35mm reeds section to obtain length, with mechanical grading and pneumatic separation to reed
Reed section is purified, and removes in reed section more than 98% impurity, obtains the wet wood shavings of reed that moisture content is 20%.Reed is wet
Wood shavings carry out sizing screening, remove the wet wood shavings of tubular reed for not cleaving or not cleaving completely as fuel, and it is 2 to screen out thickness
~3mm wet the wood shavings of qualified reed.Qualified reed wood shavings are dried, it is 550 DEG C to dry heat medium temperature, makes the moisture content be
1%, dry wood shavings are made, dry wood shavings are sieved using 0.2 × 0.2mm, 1.4 × 1.4mm, 10.0 × 10.0mm three-layer networks hole sizer
Choosing, respectively obtains top layer wood shavings and sandwich layer wood shavings.It is different that dicyclohexyl methyl hydride two is separately added into top layer wood shavings and sandwich layer wood shavings
Cyanate adhesive (viscosity at 20 DEG C is 250mPas), the addition mass ratio of adhesive is：Top layer wood shavings:Adhesive=
1:0.03, sandwich layer wood shavings:Adhesive=1:0.03.Top layer wood shavings are divided into upper epidermis wood shavings and layer wood shavings, by layer
Wood shavings, sandwich layer wood shavings and upper epidermis wood shavings are mated formation from the bottom up, and it is 5mm to make layer thickness, and core layer thickness is 32mm, on
Skin depth is 5mm, and spreading goes out the continuous slab of three layers of gradual change composite construction, and PPG water is sprayed in slab upper and lower surface
Property releasing agent, the quantity for spray of releasing agent is 10g/m2.Hot pressing is carried out to slab, hot pressing temperature is 200 DEG C, and hot pressing pressure is 5N/
mm2, hot pressing time is to obtain reed wood shavings hair plates after 10s/mm, hot pressing；Then carry out thickness measuring and weighing, by thickness be 42mm,
Density is 800kg/m3Qualified reed wood shavings hair plates carry out cooling it is standby, chilling temperature be 50 DEG C.To qualified reed wood shavings hair
Plate carries out fixed thick and fine sanding, is then split into finished product sheet material, i.e. reed-shavings board.Reed-shavings board burst size of methanal is entered
Row is determined, and is not detected, meets national standard GB/T18580-2001 E1 levels requirement.
Embodiment 3
Reed is rolled and cut, it is about 35mm reeds section to obtain length, with mechanical grading and pneumatic separation to reed
Reed section is purified, and removes in reed section more than 98% impurity, obtains the wet wood shavings of reed that moisture content is 18%.Reed is wet
Wood shavings carry out sizing screening, remove the wet wood shavings of tubular reed for not cleaving or not cleaving completely as fuel, and it is 2 to screen out thickness
~3mm wet the wood shavings of qualified reed.Qualified reed wood shavings are dried, it is 500 DEG C to dry heat medium temperature, makes the moisture content be
3%, dry wood shavings are made, dry wood shavings are sieved using 0.2 × 0.2mm, 1.4 × 1.4mm, 10.0 × 10.0mm three-layer networks hole sizer
Choosing, respectively obtains top layer wood shavings and sandwich layer wood shavings.The methylenes of trimethyl -1,6- six are separately added into top layer wood shavings and sandwich layer wood shavings
Group diisocyanate adhesive (viscosity at 20 DEG C is 200mPas), the addition mass ratio of adhesive is：Top layer wood shavings:Glue
Glutinous agent=1:0.04, sandwich layer wood shavings:Adhesive=1:0.03.Top layer wood shavings are divided into upper epidermis wood shavings and layer wood shavings, will
Layer wood shavings, sandwich layer wood shavings and upper epidermis wood shavings are mated formation from the bottom up, and it is 3mm to make layer thickness, and core layer thickness is
20mm, upper epidermis thickness is 3mm, and spreading goes out the continuous slab of three layers of gradual change composite construction, and polyethers is sprayed in slab upper and lower surface
Polyalcohol aqueous release agent, the quantity for spray of releasing agent is 5g/m2.Hot pressing is carried out to slab, hot pressing temperature is 200 DEG C, hot pressing pressure
Power is 4N/mm2, hot pressing time is to obtain reed wood shavings hair plates after 9s/mm, hot pressing；Then carry out thickness measuring and weigh, be by thickness
26mm, density are 650kg/m3Qualified reed wood shavings hair plates carry out cooling it is standby, chilling temperature be 30 DEG C.Qualified reed is dug
Flower hair plates carries out fixed thick and fine sanding, is then split into finished product sheet material, i.e. reed-shavings board.To reed-shavings board Form aldehyde release
Amount is measured, and is not detected, meets national standard GB/T18580-2001 E1 levels requirement.
Claims (2)
1. a kind of reed-shavings board, it is characterised in that the reed-shavings board is made up of layer, sandwich layer and upper epidermis, upper epidermis,
Layer includes top layer wood shavings and adhesive respectively, and sandwich layer includes sandwich layer wood shavings and adhesive, described upper epidermis and layer
Thickness is delivered as 1~5mm, and top layer wood shavings pass through the screening of 1.4 × 1.4mm mesh and obtained；Core layer thickness is 4~32mm, sandwich layer plane
Colored length is 15~35mm, and width is 1.5~3mm.
2. a kind of preparation method of reed-shavings board as claimed in claim 1, it is characterised in that the preparation method includes following
Step：
(1) reed is rolled and cut, reed section theoretical length about 35mm is obtained, with mechanical grading and pneumatic separation to reed
Reed section is purified, and the wet wood shavings of reed are obtained after removing the impurity in reed section, and the moisture content for obtaining the wet wood shavings of reed is 15%
~20%, the impurity of removal is as fuel, and burning produces heat and used for step (3) and (7)；Impurity includes reed marrow core and reed
Reed etc., removal of impurity is more than 98%.
(2) the wet wood shavings of the reed of above-mentioned steps (1) are subjected to sizing screening, screen out the wet plane of qualified reed that thickness is 2~3mm
Flower, the wet wood shavings of tubular reed for not cleaving or not cleaving completely are removed as fuel, and burning produces heat and supplies step (3) and (7)
Use；
(3) the wet wood shavings of qualified reed of above-mentioned steps (2) are dried, it is 450~550 DEG C to dry heat medium temperature, makes wood shavings
Moisture content is reduced to 1%~5%, and dry wood shavings are made；Waste material can be collected by step (1), (2), (4) and (9) by drying institute's calorific requirement
Burning is provided；
(4) above-mentioned steps (3) dry wood shavings are screened, reed fine powder, top layer wood shavings, sandwich layer wood shavings and excessive is filtered out respectively
Wood shavings, wherein the reed fine powder filtered out by 0.2 × 0.2mm mesh is used as fuel, burning produce heat for step (3) and
(7) use；Top layer wood shavings are obtained by the screening of 1.4 × 1.4mm mesh；Sandwich layer is obtained by the screening of 10.0 × 10.0mm mesh to dig
Flower；Sieve ring type sander broken rear repeat step (4) is not again entered by the excessive wood shavings of 10.0 × 10.0mm mesh；
(5) adhesive is separately added into the top layer wood shavings and sandwich layer wood shavings of above-mentioned steps (4), the addition quality of adhesive is：
Top layer wood shavings:Adhesive=1:(0.03~0.05), sandwich layer wood shavings:Adhesive=1:(0.03~0.04), described adhesive
For poly- polyphenyl polymethylene isocyanates or the derivative of poly- polyphenyl polymethylene isocyanates, adhesive is at 20 DEG C
Viscosity is 150~250mPas；
(6) top layer wood shavings are divided into upper epidermis wood shavings and layer wood shavings, by layer wood shavings, sandwich layer wood shavings and upper epidermis wood shavings
Mated formation from the bottom up, it is 1~5mm to make layer thickness, core layer thickness is 4~32mm, and upper epidermis thickness is 1~5mm, paving
Spread out the continuous slab of three-decker, spray releasing agent respectively on the upper and lower surface of slab, the quantity for spray of releasing agent for 2~
10g/m2, described releasing agent is PPG；
(7) hot pressing is carried out to above-mentioned slab, hot pressing temperature is 200 DEG C, and hot pressing pressure is 2~5N/mm2, hot pressing time be 8~
Reed wood shavings hair plates is obtained after 10s/mm, hot pressing；
(8) the reed wood shavings hair plates of above-mentioned steps (7) is subjected to thickness measuring and weighed, be that 6~42mm, density are 550kg/ by thickness
m3~800kg/m3Qualified reed wood shavings hair plates carry out cooling it is standby, be cooled to 10~50 DEG C；
(9) fixed thick and fine sanding is carried out to qualified reed wood shavings hair plates, the qualified reed wood shavings hair plates after sanding is divided into
Trimmed size sheet material, i.e. reed-shavings board, described fixed thick size are 5~41mm；The waste material produced in production process and sanding
Powder is used through collecting after-combustion, the heat of generation for step (3) and (7).
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| CN108145821A (en) * | 2017-12-22 | 2018-06-12 | 万华生态板业(信阳)有限公司 | Wood-based plate and its manufacturing method comprising giantreed |
| CN108162095A (en) * | 2017-12-08 | 2018-06-15 | 万华生态板业(信阳)有限公司 | Stalk-shaving board and artificial board of straw |
| CN108356953A (en) * | 2018-03-16 | 2018-08-03 | 广东始兴县华洲木业有限公司 | A kind of preparation method and applications for the releasing agent for preventing wood shavings Nian Jie with hot-die |
| CN109049171A (en) * | 2018-07-27 | 2018-12-21 | 绍兴臣工新材料科技有限公司 | A kind of orientation wheat straw board and preparation method thereof |
| WO2019100749A1 (en) * | 2017-11-27 | 2019-05-31 | 万华禾香板业有限责任公司 | Manufacturing method for straw particleboard and straw particleboard |
| WO2019109651A1 (en) * | 2017-12-08 | 2019-06-13 | 万华禾香板业有限责任公司 | Artificial board containing straw surface layer and wood core layer |
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| CN109049171A (en) * | 2018-07-27 | 2018-12-21 | 绍兴臣工新材料科技有限公司 | A kind of orientation wheat straw board and preparation method thereof |
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