CN107243975B - 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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- CN107243975B CN107243975B CN201710532042.3A CN201710532042A CN107243975B CN 107243975 B CN107243975 B CN 107243975B CN 201710532042 A CN201710532042 A CN 201710532042A CN 107243975 B CN107243975 B CN 107243975B
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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
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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
- B27N3/002—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
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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
- 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
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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
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The present invention relates to a kind of reed-shavings boards 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 surface layer wood shavings and sandwich layer wood shavings, obtains the plate of excellent in mechanical performance；And by adding poly- polyphenyl polymethylene isocyanates or derivatives thereof environment-protective adhesive, so that the environmental protection of plate and humidity resistance increase substantially, can be good at being applied to the fields such as Furniture manufacturing, indoor and outdoor decoration and packaging material.The present invention is using the waste material generated in reed mechanical grading and pneumatic separation impurity, production process and reed wood shavings hair plates sanding powder as fuel combustion, it is used for reed particle drying and slab hot pressing energy, considerably reduce production cost, and no solid waste discharge is realized, clean manufacturing is conducive to.
Description
Technical field
The present invention relates to a kind of reed-shavings boards and preparation method thereof, belong to novel straw Wood-based Panel Production technical field.
Background technique
China's reed sediment substrate is abundant, widely distributed, is annual herb plant, according to statistics the annual reed total amount in current China
About 2,500,000 tons, account for about the 6% of Gross World Product.Reed is in terms of industrial application mainly as paper making raw material at present.With timber
The day of resource is becoming tight, and finds timber alternative materials by more and more extensive attention.Reed is close due to physicochemical characteristics
In timber and content of cellulose it is suitable with timber, therefore can be used as timber alternative materials production wood-based plate.However, reed
Performance and timber still have certain difference, and 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 gluing, therefore production technology and product quality also have one
Determine difference.Therefore, it is that solving the gluing between reed and adhesive asks using reed as the key technology that raw material produces wood-based plate
Topic, and pass through the mass production of optimization technique realization high-performance reed lumber.
Summary of the invention
The purpose of the present invention is to propose to a kind of reed-shavings boards and preparation method thereof, using reed wood shavings as raw material, with poly- more
Phenyl polymethylene isocyanates or derivatives thereof be adhesive, produce 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 of layer, sandwich layer and upper epidermis, and upper epidermis, layer are wrapped respectively
Including surface layer wood shavings and adhesive, sandwich layer includes sandwich layer wood shavings and adhesive, and the upper epidermis and layer thickness delivers as 1~
5mm, surface layer wood shavings are obtained by the screening of 1.4 × 1.4mm mesh；Core layer thickness is 4~32mm, the length of sandwich layer wood shavings is 15~
35mm, width are 1.5~3mm.
The preparation method of reed-shavings board proposed by the present invention, method the following steps are included:
(1) reed is rolled and is cut, reed section theoretical length about 35mm is obtained, with mechanical grading and pneumatic separation
Reed section is purified, obtains the wet wood shavings of reed after the impurity in removal reed section, the moisture content for obtaining the wet wood shavings of reed is
15%~20%, as fuel, burning generates heat and uses for step (3) and (7) impurity of removal；Impurity includes reed marrow core
With bulrush flower etc., removal of impurity is 98% or more.
(2) the wet wood shavings of the reed of above-mentioned steps (1) are subjected to sizing screening, screen out the qualified reed with a thickness of 2~3mm
Wet wood shavings, do not cleave or the wet wood shavings removal of the tubular reed that does not cleave completely is as fuel, burning generate heat for step (3) and
(7) it uses；
(3) the wet wood shavings of qualified reed of above-mentioned steps (2) are dried, dry heat medium temperature is 450~550 DEG C, is made
Wood shavings moisture content is reduced to 1%~5%, and dry wood shavings are made；Dry institute's calorific requirement can be collected by step (1), (2), (4) and (9)
Waste combustion provides.
(4) above-mentioned steps (3) dry wood shavings are screened, filter out respectively reed fine powder, surface 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 as fuel, burning generates heat for step (3)
(7) it uses；It is screened by 1.4 × 1.4mm mesh and obtains surface layer wood shavings；It is screened by 10.0 × 10.0mm mesh and obtains sandwich layer
Wood shavings；Sieve ring type sander broken rear repetition step (4) again is not entered by the excessive wood shavings of 10.0 × 10.0mm mesh；
(5) adhesive, the addition quality of adhesive are separately added into the surface layer wood shavings and sandwich layer wood shavings of above-mentioned steps (4)
Are as follows: surface layer wood shavings: adhesive=1:(0.03~0.05), sandwich layer wood shavings: adhesive=1:(0.03~0.04), the 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) surface 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 with a thickness of 1~5mm, and core layer thickness is 4~32mm, upper epidermis with a thickness of 1~
5mm, spreading go out the continuous slab of three-decker, spray release agent respectively in the upper and lower surfaces of slab, the quantity for spray of release agent is
2~10g/m2, the release agent is polyether polyol；
(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 8
~10s/mm obtains reed wood shavings hair plates after hot pressing；
(8) the reed wood shavings hair plates of above-mentioned steps (7) is subjected to thickness measuring and weighing, will will be with a thickness of 6~42mm, density
550kg/m3~800kg/m3Qualified reed wood shavings hair plates cool down spare, 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
It is cut into trimmed size plate, i.e. reed-shavings board, the fixed thickness is having a size of 5~41mm；The waste material that is generated in production process and
Sanding powder is collected after-combustion, and the heat of generation is used for step (3) and (7).
Reed-shavings board proposed by the present invention and preparation method thereof, its advantage is that: the present invention is according to the physics of reed itself
Characteristic sorts its wood shavings according to different size, by distributing rationally for surface layer wood shavings and sandwich layer wood shavings, obtains mechanical property
Excellent plate；And by adding poly- polyphenyl polymethylene isocyanates or derivatives thereof environment-protective adhesive, so that plate
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 generated in reed mechanical grading and pneumatic separation impurity, production process and reed wood shavings hair plates sand
Light powder is used as fuel combustion for reed particle drying and slab hot pressing energy, considerably reduces production cost, and real
Show without solid waste discharge, has been conducive to clean manufacturing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram 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.
Specific embodiment
Reed-shavings board proposed by the present invention, structure as shown in Figure 1, the reed-shavings board by layer, sandwich layer and on
Surface layer composition, upper epidermis, layer respectively include surface layer wood shavings and adhesive, and sandwich layer includes sandwich layer wood shavings and adhesive, described
Upper epidermis and layer thickness deliver as 1~5mm, surface layer wood shavings are obtained by the screening of 1.4 × 1.4mm mesh；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, comprising the following steps:
(1) reed is rolled and is cut, reed section theoretical length about 35mm is obtained, with mechanical grading and pneumatic separation
Reed section is purified, obtains the wet wood shavings of reed after the impurity in removal reed section, the moisture content for obtaining the wet wood shavings of reed is
15%~20%, as fuel, burning generates heat and uses for step (3) and (7) impurity of removal；Impurity includes reed marrow core
With bulrush flower etc., removal of impurity is 98% or more.
(2) the wet wood shavings of the reed of above-mentioned steps (1) are subjected to sizing screening, screen out the qualified reed with a thickness of 2~3mm
Wet wood shavings, do not cleave or the wet wood shavings removal of the tubular reed that does not cleave completely is as fuel, burning generate heat for step (3) and
(7) it uses；
(3) the wet wood shavings of qualified reed of above-mentioned steps (2) are dried, dry heat medium temperature is 450~550 DEG C, is made
Wood shavings moisture content is reduced to 1%~5%, and dry wood shavings are made；Dry institute's calorific requirement can be collected by step (1), (2), (4) and (9)
Waste combustion provides.
(4) above-mentioned steps (3) dry wood shavings are screened, filter out respectively reed fine powder, surface 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 as fuel, burning generates heat for step (3)
(7) it uses；It is screened by 1.4 × 1.4mm mesh and obtains surface layer wood shavings；It is screened by 10.0 × 10.0mm mesh and obtains sandwich layer
Wood shavings；Sieve ring type sander broken rear repetition step (4) again is not entered by the excessive wood shavings of 10.0 × 10.0mm mesh；
(5) adhesive, the addition quality of adhesive are separately added into the surface layer wood shavings and sandwich layer wood shavings of above-mentioned steps (4)
Are as follows: surface layer wood shavings: adhesive=1:(0.03~0.05), sandwich layer wood shavings: adhesive=1:(0.03~0.04), the 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) surface 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 with a thickness of 1~5mm, and core layer thickness is 4~32mm, upper epidermis with a thickness of 1~
5mm, spreading go out the continuous slab of three-decker, spray release agent respectively in the upper and lower surfaces of slab, the quantity for spray of release agent is
2~10g/m2, the release agent is polyether polyol；
(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 8
~10s/mm obtains reed wood shavings hair plates after hot pressing；
(8) the reed wood shavings hair plates of above-mentioned steps (7) is subjected to thickness measuring and weighing, will will be with a thickness of 6~42mm, density
550kg/m3~800kg/m3Qualified reed wood shavings hair plates cool down spare, 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
It is cut into trimmed size plate, i.e. reed-shavings board, the fixed thickness is having a size of 5~41mm；The waste material that is generated in production process and
Sanding powder is collected after-combustion, and the heat of generation is used for step (3) and (7).
For the technology contents of the present invention will be described in detail reed-shavings board, below in conjunction with embodiment and cooperate attached drawing make into
One step explanation.
The reed-shavings board is made of layer 3, sandwich layer 2 and upper epidermis 1, layer 3, sandwich layer 2 and upper epidermis 1 respectively by
Upper and lower surface layer wood shavings and adhesive, sandwich layer wood shavings and adhesive composition；Upper and lower skin depth is 1~5mm, and surface layer wood shavings pass through
The screening of 1.4 × 1.4mm mesh obtains；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 is cut, obtaining length is about 35mm reed section, with mechanical grading and pneumatic separation to reed
Reed section is purified, and 98% or more impurity, obtains the wet wood shavings of reed that moisture content is 15% in removal reed section.Reed is wet
Wood shavings carry out sizing screening, and removal does not cleave or the wet wood shavings of tubular reed that do not cleave completely are as fuel, screen out with a thickness of 2
The wet wood shavings of qualified reed of~3mm.Qualified reed wood shavings are dried, dry heat medium temperature is 450 DEG C, makes moisture content
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 network hole sizer
Choosing, respectively obtains surface layer wood shavings and sandwich layer wood shavings.Poly- polyphenyl polymethylene is separately added into surface layer wood shavings and sandwich layer wood shavings
Isocyanates gluing agent (viscosity at 20 DEG C is 150mPas), the addition mass ratio of adhesive are as follows: surface layer wood shavings: adhesive
=1:0.05, sandwich layer wood shavings: adhesive=1:0.04.Surface 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, make layer with a thickness of 1mm, core layer thickness 4mm,
For upper epidermis with a thickness of 1mm, spreading goes out the continuous slab of three layers of gradual change composite construction, sprays polyether polyol in slab upper and lower surface
Aqueous release agent, the quantity for spray of release agent are 2g/m2.Hot pressing is carried out to slab, hot pressing temperature is 200 DEG C, hot pressing pressure 2N/
mm2, hot pressing time 8s/mm obtains reed wood shavings hair plates after hot pressing；Then thickness measuring and weighing are carried out, it will be with a thickness of 6mm, close
Degree is 550kg/m3Qualified reed wood shavings hair plates cool down it is spare, cooling temperature be 10 DEG C.To qualified reed wood shavings hair plates
Fixed thick and fine sanding is carried out, finished product plate, i.e. reed-shavings board are then split into.Reed-shavings board burst size of methanal is carried out
Measurement, is not detected, and meets the E1 grade requirement of national standard GB/T18580-2001.
Embodiment 2
Reed is rolled and is cut, obtaining length is about 35mm reed section, with mechanical grading and pneumatic separation to reed
Reed section is purified, and 98% or more impurity, obtains the wet wood shavings of reed that moisture content is 20% in removal reed section.Reed is wet
Wood shavings carry out sizing screening, and removal does not cleave or the wet wood shavings of tubular reed that do not cleave completely are as fuel, screen out with a thickness of 2
The wet wood shavings of qualified reed of~3mm.Qualified reed wood shavings are dried, dry heat medium temperature is 550 DEG C, makes moisture content
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 network hole sizer
Choosing, respectively obtains surface layer wood shavings and sandwich layer wood shavings.It is different that dicyclohexyl methyl hydride two is separately added into surface layer wood shavings and sandwich layer wood shavings
Cyanate adhesive (viscosity at 20 DEG C is 250mPas), the addition mass ratio of adhesive are as follows: surface layer wood shavings: adhesive=
1:0.03, sandwich layer wood shavings: adhesive=1:0.03.Surface 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 with a thickness of 5mm, core layer thickness 32mm, on
Skin depth is 5mm, and spreading goes out the continuous slab of three layers of gradual change composite construction, sprays polyether polyol water in slab upper and lower surface
Property release agent, the quantity for spray of release agent is 10g/m2.Hot pressing is carried out to slab, hot pressing temperature is 200 DEG C, hot pressing pressure 5N/
mm2, hot pressing time 10s/mm obtains reed wood shavings hair plates after hot pressing；Then thickness measuring and weighing are carried out, will with a thickness of 42mm,
Density is 800kg/m3Qualified reed wood shavings hair plates cool down it is spare, cooling 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 plate, i.e. reed-shavings board.To reed-shavings board burst size of methanal into
Row measurement, is not detected, and meets the E1 grade requirement of national standard GB/T18580-2001.
Embodiment 3
Reed is rolled and is cut, obtaining length is about 35mm reed section, with mechanical grading and pneumatic separation to reed
Reed section is purified, and 98% or more impurity, obtains the wet wood shavings of reed that moisture content is 18% in removal reed section.Reed is wet
Wood shavings carry out sizing screening, and removal does not cleave or the wet wood shavings of tubular reed that do not cleave completely are as fuel, screen out with a thickness of 2
The wet wood shavings of qualified reed of~3mm.Qualified reed wood shavings are dried, dry heat medium temperature is 500 DEG C, makes moisture content
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 network hole sizer
Choosing, respectively obtains surface layer wood shavings and sandwich layer wood shavings.Six methylene of trimethyl -1,6- is separately added into surface layer wood shavings and sandwich layer wood shavings
Group diisocyanate adhesive (viscosity at 20 DEG C is 200mPas), the addition mass ratio of adhesive are as follows: surface layer wood shavings: glue
Glutinous agent=1:0.04, sandwich layer wood shavings: adhesive=1:0.03.Surface layer wood shavings are divided into upper epidermis wood shavings and layer wood shavings, it will
Layer wood shavings, sandwich layer wood shavings and upper epidermis wood shavings are mated formation from the bottom up, make layer with a thickness of 3mm, and core layer thickness is
20mm, for upper epidermis with a thickness of 3mm, spreading goes out the continuous slab of three layers of gradual change composite construction, sprays polyethers in slab upper and lower surface
Polyalcohol aqueous release agent, the quantity for spray of release agent are 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 9s/mm obtains reed wood shavings hair plates after hot pressing；Then thickness measuring and weighing are carried out, it will be with a thickness of
26mm, density 650kg/m3Qualified reed wood shavings hair plates cool down it is spare, cooling 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 plate, i.e. reed-shavings board.To reed-shavings board Form aldehyde release
Amount is measured, and is not detected, and the E1 grade requirement of national standard GB/T18580-2001 is met.
Claims (1)
1. a kind of preparation method of reed-shavings board, it is characterised in that the preparation method the following steps are included:
(1) reed is rolled and is cut, reed section theoretical length 35mm is obtained, with mechanical grading and pneumatic separation to reed
Duan Jinhang purification obtains the wet wood shavings of reed after the impurity in removal 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 generates heat and uses for step (3) and (7), and impurity includes reed marrow core and reed
Flower, removal of impurity are 98% or more；
(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 with a thickness of 2~3mm
Flower, the wet wood shavings removal of tubular reed for not cleaving or not cleaving completely are used as fuel, and burning generates heat for step (3) and (7)
It uses；
(3) the wet wood shavings of qualified reed of above-mentioned steps (2) are dried, dry heat medium temperature is 450~550 DEG C, makes wood shavings
Moisture content is reduced to 1%~5%, and dry wood shavings are made；Dry institute's calorific requirement collects waste combustion by step (1), (2), (4) and (9)
It provides；
(4) above-mentioned steps (3) dry wood shavings are screened, filters out reed fine powder, surface layer wood shavings, sandwich layer wood shavings and excessive respectively
Wood shavings, wherein the reed fine powder filtered out by 0.2 × 0.2mm mesh is as fuel, burning generate heat for step (3) and
(7) it uses；It is screened by 1.4 × 1.4mm mesh and obtains surface layer wood shavings；It is screened by 10.0 × 10.0mm mesh and obtains sandwich layer plane
Flower；Sieve ring type sander broken rear repetition step (4) again is not entered by the excessive wood shavings of 10.0 × 10.0mm mesh；
(5) adhesive, the addition quality of adhesive are separately added into the surface layer wood shavings and sandwich layer wood shavings of above-mentioned steps (4) are as follows:
Surface layer wood shavings: adhesive=1:(0.03~0.05), sandwich layer wood shavings: adhesive=1:(0.03~0.04), the 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) surface 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
Mat formation from the bottom up, make layer with a thickness of 1~5mm, core layer thickness is 4~32mm, and upper epidermis is with a thickness of 1~5mm, paving
The continuous slab for spreading out three-decker sprays release agent in the upper and lower surfaces of slab respectively, and the quantity for spray of release agent is 2~
10g/m2, the release agent is polyether polyol；
(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~
10s/mm obtains reed wood shavings hair plates after hot pressing；
(8) the reed wood shavings hair plates of above-mentioned steps (7) is subjected to thickness measuring and weighing, it will be with a thickness of 6~42mm, density 550kg/
m3~800kg/m3Qualified reed wood shavings hair plates cool down spare, 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 plate, i.e. reed-shavings board, the fixed thickness is having a size of 5~41mm；The waste material generated in production process and sanding
Powder is collected after-combustion, and the heat of generation is used for step (3) and (7).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107984592A (en) * | 2017-11-27 | 2018-05-04 | 万华生态板业(信阳)有限公司 | The manufacture method and stalk-shaving board of stalk-shaving board |
| CN108162095B (en) * | 2017-12-08 | 2020-10-23 | 万华生态板业集成设备有限公司 | Straw shaving board and straw artificial board |
| CN108177207A (en) * | 2017-12-08 | 2018-06-19 | 万华生态板业(信阳)有限公司 | Wood-based plate comprising stalk surface layer and timber sandwich layer |
| 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 |
| 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 |
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