CN107984589B - A kind of high-strength directional particieboard and its production method - Google Patents

A kind of high-strength directional particieboard and its production method Download PDF

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Publication number
CN107984589B
CN107984589B CN201711495554.3A CN201711495554A CN107984589B CN 107984589 B CN107984589 B CN 107984589B CN 201711495554 A CN201711495554 A CN 201711495554A CN 107984589 B CN107984589 B CN 107984589B
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layer
wood shavings
sandwich layer
strength
formation
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CN107984589A (en
Inventor
薛茂林
钟笃章
国智武
葛立军
郑凤山
侯海建
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Shouguang Luli Wood Co Ltd
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Shouguang Luli Wood Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE 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
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/02Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/02Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood shavings or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE 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
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE 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
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • B27N3/18Auxiliary operations, e.g. preheating, humidifying, cutting-off

Abstract

The present invention provides a kind of high-strength directional particieboard and its production methods, the mass ratio on the high-strength directional particieboard surface layer and sandwich layer is 40-55%/60-45%, parallel static bending strength is 49.36-64.25MPa, vertical static bending strength is 23.20-27.36Mpa, internal bond strength 1.25-2.52MPa;Production method of the invention, in heat-press step, sprinkling on the surface of mat amount is 30-50 ㎎/㎡, and press speed is 200-300mm/s, and the platen temperature in press temperature control region is respectively 240-245 DEG C, 230-240 DEG C, 215-225 DEG C, 175-185 DEG C, 155-165 DEG C, technological parameter of the invention is easy to control, method is simple, and production qualification rate is high, and product thickness is uniform, stablizes, thickness deviation is small, improves production efficiency.

Description

A kind of high-strength directional particieboard and its production method
Technical field
The invention belongs to particieboard manufacturing technology fields, are related to a kind of oriented wood chipboard, and in particular to a kind of high-intensitive fixed To particieboard and its production method.
Background technique
Oriented wood chipboard physical and mechanical property with higher, it is considered to be the cheap substitution of the ideal of the following glued board produces Product.Oriented strand board panels matter is fine and closely woven, has the surface processing performance better than glued board and particieboard.Oriented wood chipboard combines The advantages of fiberboard and particieboard is the main with one of material of the following Furniture panel.
Oriented wood chipboard is through drying, sizing, orienting spreading and hot-forming.Wood shavings are mated formation when forming, oriented wood chipboard Two surface layers up and down glue mixing wood shavings are arranged by its machine direction stringer, and sandwich layer wood shavings are transversely arranged, form three-decker Plate embryo, and then oriented wood chipboard is made in hot pressing.
Existing oriented wood chipboard is primarily present following defect: (1) existing oriented wood chipboard, internal bond strength and bending Elasticity modulus cannot improve simultaneously;
(2) production method of existing oriented wood chipboard, thickness swelling rate is high, and wet parallel static bending strength is low, in tide Intensity requirement is not able to satisfy under wet condition;
(3) production method of existing oriented wood chipboard, obtained oriented wood chipboard orientation ratio is low, and production efficiency is low.
Summary of the invention
Against the above deficiency, technical problem to be solved by the invention is to provide a kind of high-strength directional particieboards by the present invention And its production method.Following goal of the invention may be implemented in the present invention:
(1) high-strength directional particieboard produced by the invention can improve the internal bond strength and bending bullet of product simultaneously Property modulus, expand application range;
(2) high-strength directional particieboard produced by the invention, can reduce product thickness swelling rate and moisture content;
(3) the high-strength directional particieboard obtained using the production method of high-strength directional particieboard of the invention, in parallel Static bending strength and vertical static bending strength are high.
In order to solve the above technical problems, using following technical scheme:
A kind of high-strength directional particieboard, which is characterized in that the high-strength directional particieboard, the quality on surface layer and sandwich layer Than for 40-55%/60-45%.
The high-strength directional particieboard, internal bond strength and bending elastic modulus are improved simultaneously, high-strength directional Particieboard internal bond strength is 1.25-2.52MPa, and parallel bending elastic modulus is 9035-9945MPa, vertical curve springform Amount is 3206-3621MPa;Thickness swelling rate 4.11-5.2%, moisture content 3.5%, water-fast, high temperature resistant, weatherability obtain It is promoted;Parallel static bending strength is 49.36-64.25MPa, and vertical static bending strength is 23.20-27.36MPa.
A kind of production method of high-strength directional particieboard, long-log sheer are obtained by knife shaft flaker flaking, the length Material flaking machine knife ring revolving speed 300rpm, trolley locator position 60mm/sec, 32 ° of material fly cutter sharpening angle long, reversed nose angle degree It is 75 °, it is 0.5 ㎜ that fly cutter, which stretches knife amount,;Cutter service life≤2.5-4h.
The long-log sheer, length 60-130mm, thickness 0.45-0.65mm, width 15-30mm;The long-log sheer Raw material be eucalyptus.
The drying, moisture content≤3.5% after drying, to guarantee that moisture content is stablized, dry bin-level >=45%.
The wood shavings sizing, surface layer wood shavings applied amount:
Sandwich layer wood shavings applied amount:
It is glued later moisture content are as follows: surface layer wood shavings: 9-11%, sandwich layer wood shavings: 5-6%.
Described to mat formation, density of mating formation is 700-710kg/m3;The measuring chute material position of mating formation is not less than 45% material position;Mat formation Moisture content afterwards is surface layer slab: 9-11%, sandwich layer slab: 5-6%.
In the heat-press step, sprinkling on the surface of mat amount is 30-40 ㎎/㎡, prepares release agent with commercially available release agent stoste Solution, release agent stoste in release agent solution: water=1:2, dosage of the release agent solution on slab are 1.5-3L/ ㎡;Press speed Degree is 100-300mm/s;
The platen temperature in five temperature control regions of press is respectively 240-245 DEG C, 230-240 DEG C, 215-225 DEG C, 175-185 ℃,155-165℃;The pressure reference value of three pressure control zones of press is 0.00-3.5N/mm2
The invention adopts the above technical scheme, compared with prior art, has the advantage that
(1) high-strength directional particieboard of the invention, internal bond strength and bending elastic modulus are improved simultaneously, high-strength Degree oriented wood chipboard internal bond strength is 1.25-2.52MPa, and parallel bending elastic modulus is 9035-9945MPa, vertical curve Elasticity modulus is 3206-3621MPa;
(2) high-strength directional particieboard of the invention, thickness swelling rate 4.11-5.2%, moisture content 3.5% are resistance to Water, high temperature resistant, weatherability get a promotion;
(3) high-strength directional particieboard of the invention, parallel static bending strength are 49.36-64.25MPa, vertical static bending strength For 23.20-27.36MPa;
(4) production method of high-strength directional particieboard of the invention, is easy to control with technological parameter, and method is simple, The advantages of production qualification rate is high, high production efficiency;
By oriented wood chipboard produced by the invention, not only intensity is high, and moistureproof and waterproof performance is super good, and index performance is much It has been more than the standard requirements of the highest level OSB4 of LY/T1580-2010.Oriented wood chipboard of the invention is water-fast, high temperature resistant, resistance to Time property gets a promotion, and the burst size of methanal of plate has reached the ultralow range of 0.3mg/100g or so, well below solid wood The burst size of methanal of 0.6-1.0mg/100g has been truly realized the addition of zero formaldehyde, and economic and environment-friendly, plate safety health, formaldehyde is released High-volume reach log rank or less.
Specific embodiment
A kind of high-strength directional particieboard of embodiment 1 and its production method
A kind of high-strength directional particieboard is after being mated formation by upper epidermis, sandwich layer and three layers of layer by orienting spreading disk Hot pressing forms;The upper epidermis and the layer constitute surface layer;The sandwich layer and the angle of mating formation on the surface layer are at 90 ± 10 ° Accounting in range is 90% or more, and the mass ratio of the surface layer and the sandwich layer is 40%/60%.
A kind of production method of high-strength directional particieboard of the invention, specifically includes the following steps:
(1) prepared by raw material:
The present invention relates to raw material be long-log sheer, be to be obtained after chipper machining by large diameter log Specific length, width, thickness flaking.
The long-log sheer is obtained by knife shaft flaker flaking, the long-log sheer machine knife ring revolving speed 300rpm, trolley Locator position 60mm/sec, 32 ° of material fly cutter sharpening angle long, reversed nose angle degree is 75 °, and it is 0.5 ㎜ that fly cutter, which stretches knife amount,;Cutter Service life≤2.5-4h.
The long-log sheer, length 60-130mm, thickness 0.45-0.65mm, width 15-30mm;
The raw material of the long-log sheer are eucalyptus.
(2) dry
Enter long-log sheer feed bin by the long-log sheer that long-log sheer is machined to be kept in, then extremely by belt-conveying Roller drier is dried.
The drying, moisture content≤3.5% after drying, to guarantee that moisture content is stablized, dry bin-level >=45%.
Long-log sheer after the completion of drying enters cylinder round sifter and is sieved, and obtains sandwich layer wood shavings and surface layer wood shavings,
The sandwich layer wood shavings and the surface layer wood shavings respectively enter the dry wood shavings feed bin in surface layer and the dry wood shavings feed bin of sandwich layer carries out It is temporary;
Sandwich layer wood shavings and surface layer shaving shape are as follows:
(3) wood shavings are glued
The sandwich layer wood shavings that screening finishes, which enter in sandwich layer blender, to be glued, and is added in Process of Applying Glue different degrees of Process water, waterproofing agent, PMDI glue;
The surface layer wood shavings that screening finishes enter surface layer blender and are glued, and add in various degree in Process of Applying Glue Process water, waterproofing agent, PMDI glue;
According to the sizing of material and proportion progress surface layer wood shavings in following table and the sizing of sandwich layer wood shavings:
Surface layer wood shavings applied amount:
The percentage matched above is the percentage that each material accounts for surface layer wood shavings quality.
Sandwich layer wood shavings applied amount:
The percentage matched above is the percentage that each material accounts for sandwich layer wood shavings quality.
It is glued later moisture content are as follows: surface layer wood shavings: 9%, sandwich layer wood shavings: 5%;Wood shavings after sizing are transported by scraper plate respectively Defeated machine is transported to feed bin of mating formation and keep in case mating formation.
Heretofore described PMDI is the more phenol isocyanates of polymethylene;The process water is commonly industrial Water;The waterproofing agent is paraffin wax emulsions.
(4) mat formation
Feed bin of mating formation is divided into upper epidermis feed bin, following table layer stock bin, sandwich layer feed bin;Each feed bin lower end has metering feed bin, Metering is carried out to each layer raw material respectively to mat formation.
Points three layers mat formation in a crisscross manner: disk type spreading head is used for surface layer wood shavings and mats formation, and surface layer wood shavings are from the front end of feed bin It discharges and passes through disc-type roller, surface layer wood shavings are mated formation along production line direction;
Sandwich layer wood shavings, which discharge from the front end of feed bin and pass through fin spreading head, mats formation, by sandwich layer wood shavings edge and production line direction Mat formation at 90o.
Accounting of angle in the range of 90 ± 10 ° of mating formation of the sandwich layer wood shavings and surface layer wood shavings is 90% or more;Mat formation Density is 700kg/m3;The measuring chute material position of mating formation is not less than 45% material position, steady, the paving of guarantee to mat formation density and face weight Slab is obtained after the completion of dress.Moisture content after mating formation is surface layer slab: 9%, sandwich layer slab: 5%.
Described to mat formation, the parameter of spreading machine is as follows:
(5) hot pressing
In the heat-press step, sprinkling on the surface of mat amount is 30 ㎎/㎡, and it is molten to prepare release agent with commercially available release agent stoste Liquid, release agent stoste in release agent solution: water=1:2, dosage of the release agent solution on slab are 1.5L/ ㎡;Press speed is 100mm/s;
The platen temperature in five temperature control regions of press is respectively 240 DEG C, 230 DEG C, 215 DEG C, 175 DEG C, 155 DEG C;Press The pressure reference value of three pressure control zones is 0.01N/mm2
Plain plate is obtained after hot-forming, the element board size is a length of 2440 ㎜, and width is 1220 ㎜;The thickness deviation of plain plate It is small.
(6) it post-processes
It is post-processed after hot pressing, the stacking ejecting plate in post-processing must be stacked neatly, next line on chock;Sheetpile pile Sanding after health 48 hours.
Floor can be used for using a kind of high-strength directional particieboard that production method described in the embodiment of the present invention obtains The every field such as substrate, toilet, kitchen, outdoor wooden structural building, corridor, container.
High-strength directional of the invention is dug according to detection method as defined in GB18580-2001 and LY/T1580-2010 Card is detected, and the result of detection is as shown in table 1 below:
Table 1: high-strength directional particieboard testing result of the present invention
A kind of high-strength directional particieboard of embodiment 2 and its production method
A kind of high-strength directional particieboard is after being mated formation by upper epidermis, sandwich layer and three layers of layer by orienting spreading disk Hot pressing forms;The upper epidermis and the layer constitute surface layer;The sandwich layer and the angle of mating formation on the surface layer are at 90 ± 10 ° Accounting in range is 90% or more, and the mass ratio of the surface layer and the sandwich layer is 55%/45%.
A kind of production method of high-strength directional particieboard of the invention, specifically includes the following steps:
(1) prepared by raw material:
The present invention relates to raw material be long-log sheer, be to be obtained after chipper machining by large diameter log Specific length, width, thickness flaking.
The long-log sheer is obtained by knife shaft flaker flaking, the long-log sheer machine knife ring revolving speed 420rpm, trolley Locator position 100mm/sec, 32 ° of material fly cutter sharpening angle long, reversed nose angle degree is 75 °, and it is 0.8 ㎜ that fly cutter, which stretches knife amount,;Knife Has service life≤2.5-4h.
The long-log sheer, length 60-130mm, thickness 0.45-0.65mm, width 15-30mm;
The raw material of the long-log sheer are eucalyptus.
(2) dry
Enter long-log sheer feed bin by the long-log sheer that long-log sheer is machined to be kept in, then extremely by belt-conveying Roller drier is dried.
The drying, moisture content≤3.5% after drying, to guarantee that moisture content is stablized, dry bin-level >=45%.
Long-log sheer after the completion of drying enters cylinder round sifter and is sieved, and obtains sandwich layer wood shavings and surface layer wood shavings,
The sandwich layer wood shavings and the surface layer wood shavings respectively enter the dry wood shavings feed bin in surface layer and the dry wood shavings feed bin of sandwich layer carries out It is temporary;
Sandwich layer wood shavings and surface layer shaving shape are as follows:
The upper epidermis wood shavings and layer wood shavings use a drum-type glue mixer, and what sandwich layer wood shavings used It is another drum-type glue mixer;It is more advantageous to the list of the additive amounts such as surface layer and sandwich layer wood shavings glue additive amount, process water in this way Solely control is conducive to the quick hot pressing of plate, improves board quality.
(3) wood shavings are glued
The sandwich layer wood shavings that screening finishes, which enter in sandwich layer blender, to be glued, and is added in Process of Applying Glue different degrees of Process water, waterproofing agent, PMDI glue;
The surface layer wood shavings that screening finishes enter surface layer blender and are glued, and add in various degree in Process of Applying Glue Process water, waterproofing agent, PMDI glue;
According to the sizing of material and proportion progress surface layer wood shavings in following table and the sizing of sandwich layer wood shavings:
Surface layer wood shavings applied amount:
The percentage matched above is the percentage that each material accounts for surface layer wood shavings quality.
Sandwich layer wood shavings applied amount:
The percentage matched above is the percentage that each material accounts for sandwich layer wood shavings quality.
After wood shavings sizing, the moisture content of surface layer wood shavings is 11%, and the moisture content of sandwich layer wood shavings is 6%;Wood shavings after sizing Feed bin of mating formation is transported to by scratch board conveyor respectively keep in case mating formation.
PMDI described in the embodiment of the present invention is the more phenol isocyanates of polymethylene;The process water is common work Industry water;The waterproofing agent is paraffin wax emulsions.
(4) mat formation
Feed bin of mating formation is divided into upper epidermis feed bin, following table layer stock bin, sandwich layer feed bin;Each feed bin lower end has metering feed bin, Metering is carried out to each layer raw material respectively to mat formation.
Points three layers mat formation in a crisscross manner: disk type spreading head is used for surface layer wood shavings and mats formation, and surface layer wood shavings are from the front end of feed bin It discharges and passes through disc-type roller, surface layer wood shavings are mated formation along production line direction;
Sandwich layer wood shavings, which discharge from the front end of feed bin and pass through fin spreading head, mats formation, by sandwich layer wood shavings edge and production line direction Mat formation at 90o.
Accounting of angle in the range of 90 ± 10 ° of mating formation of the sandwich layer wood shavings and surface layer wood shavings is 90% or more;Mat formation Density is 710kg/m3;The measuring chute material position of mating formation is not less than 60% material position, steady, the paving of guarantee to mat formation density and face weight Slab is obtained after the completion of dress.Moisture content after mating formation is surface layer slab: 11%, sandwich layer slab: 6%.
Described to mat formation, the parameter of spreading machine is as follows:
(5) hot pressing
In the heat-press step, sprinkling on the surface of mat amount is 40 ㎎/㎡, and it is molten to prepare release agent with commercially available release agent stoste Liquid, release agent stoste in release agent solution: water=1:2, dosage of the release agent solution on slab are 3L/ ㎡;Press speed is 300mm/s;
The platen temperature in five temperature control regions of press is respectively 245 DEG C, 240 DEG C, 225 DEG C, 185 DEG C, 165 DEG C;Press The pressure reference value of three pressure control zones is 3.5N/mm2
Plain plate is obtained after hot-forming, the element board size is a length of 2440 ㎜, and width is 1220 ㎜;The thickness deviation of plain plate It is small.
(6) it post-processes
It is post-processed after hot pressing, the stacking ejecting plate in post-processing must be stacked neatly, next line on chock;Sheetpile pile Sanding after health 48 hours.
Floor can be used for using a kind of high-strength directional particieboard that production method described in the embodiment of the present invention obtains The every field such as substrate, toilet, kitchen, outdoor wooden structural building, corridor, container.
High-strength directional of the invention is dug according to detection method as defined in GB18580-2001 and LY/T1580-2010 Card is detected, and the result of detection is as shown in table 2 below:
Table 2: high-strength directional particieboard testing result of the present invention
A kind of high-strength directional particieboard of embodiment 3 and its production method
A kind of high-strength directional particieboard is after being mated formation by upper epidermis, sandwich layer and three layers of layer by orienting spreading disk Hot pressing forms;The upper epidermis and the layer constitute surface layer;The sandwich layer and the angle of mating formation on the surface layer are at 90 ± 10 ° Accounting in range is 90% or more, and the mass ratio of the surface layer and the sandwich layer is 51%/49%.
A kind of production method of high-strength directional particieboard of the invention, specifically includes the following steps:
(1) prepared by raw material:
The present invention relates to raw material be long-log sheer, be to be obtained after chipper machining by large diameter log Specific length, width, thickness flaking.
The long-log sheer is obtained by knife shaft flaker flaking, the long-log sheer machine knife ring revolving speed 360rpm, trolley Locator position 85mm/sec, 32 ° of material fly cutter sharpening angle long, reversed nose angle degree is 75 °, and it is 0.6 ㎜ that fly cutter, which stretches knife amount,;Cutter Service life≤2.5-4h.
The long-log sheer, length 60-130mm, thickness 0.45-0.65mm, width 15-30mm;
The raw material of the long-log sheer are eucalyptus.
(2) dry
Enter long-log sheer feed bin by the long-log sheer that long-log sheer is machined to be kept in, then extremely by belt-conveying Roller drier is dried.
The drying, moisture content≤3.5% after drying, to guarantee that moisture content is stablized, dry bin-level >=45%.
Long-log sheer after the completion of drying enters cylinder round sifter and is sieved, and obtains sandwich layer wood shavings and surface layer wood shavings,
The sandwich layer wood shavings and the surface layer wood shavings respectively enter the dry wood shavings feed bin in surface layer and the dry wood shavings feed bin of sandwich layer carries out It is temporary;
Sandwich layer wood shavings and surface layer shaving shape are as follows:
(3) wood shavings are glued
The sandwich layer wood shavings that screening finishes, which enter in sandwich layer blender, to be glued, and is added in Process of Applying Glue different degrees of Process water, waterproofing agent, PMDI glue;
The surface layer wood shavings that screening finishes enter surface layer blender and are glued, and add in various degree in Process of Applying Glue Process water, waterproofing agent, PMDI glue;
According to the sizing of material and proportion progress surface layer wood shavings in following table and the sizing of sandwich layer wood shavings:
Surface layer wood shavings applied amount:
The percentage matched above is the percentage that each material accounts for surface layer wood shavings quality.
Sandwich layer wood shavings applied amount:
The percentage matched above is the percentage that each material accounts for sandwich layer wood shavings quality.
It is glued later moisture content are as follows: surface layer wood shavings: 10%, sandwich layer: 5.5%;Wood shavings after sizing are transported by scraper plate respectively Defeated machine is transported to feed bin of mating formation and keep in case mating formation.
Heretofore described PMDI is the more phenol isocyanates of polymethylene;The process water is commonly industrial Water;The waterproofing agent is paraffin wax emulsions.
(4) mat formation
Feed bin of mating formation is divided into upper epidermis feed bin, following table layer stock bin, sandwich layer feed bin;Each feed bin lower end has metering feed bin, Metering is carried out to each layer raw material respectively to mat formation.
Divide three layers to mat formation in a crisscross manner: layer of successively mating formation, sandwich layer, upper epidermis;Mat formation belt when mating formation in layer Surface and upper epidermis are equipped with water injector after mating formation.Disk type spreading head is mated formation for surface layer wood shavings, and surface layer wood shavings are from feed bin Front end discharges and passes through disc-type roller, and surface layer wood shavings are mated formation along production line direction;
Sandwich layer wood shavings, which discharge from the front end of feed bin and pass through fin spreading head, mats formation, by sandwich layer wood shavings edge and production line direction Mat formation at 90o.
Accounting of angle in the range of 90 ± 10 ° of mating formation of the sandwich layer wood shavings and surface layer wood shavings is 90% or more;Mat formation Density is 705kg/m3;The measuring chute material position of mating formation is not less than 60% material position, steady, the paving of guarantee to mat formation density and face weight Slab is obtained after the completion of dress.Moisture content after mating formation is surface layer slab: 10%, sandwich layer slab: 5.5%.
Described to mat formation, the parameter of spreading machine is as follows:
(5) hot pressing
In the heat-press step, sprinkling on the surface of mat amount is 36 ㎎/㎡, and it is molten to prepare release agent with commercially available release agent stoste Liquid, release agent stoste in release agent solution: water=1:2, dosage of the release agent solution on slab are 2.4L/ ㎡;Press speed is 255mm/s;
The platen temperature in five temperature control regions of press is respectively 242 DEG C, 238 DEG C, 224 DEG C, 183 DEG C, 162 DEG C;Press The pressure reference value of three pressure control zones is 1.5N/mm2
Plain plate is obtained after hot-forming, the element board size is a length of 2440 ㎜, and width is 1220 ㎜;The thickness deviation of plain plate It is small.
(6) it post-processes
It is post-processed after hot pressing, the stacking ejecting plate in post-processing must be stacked neatly, next line on chock;Sheetpile pile Sanding after health 48 hours.
Floor can be used for using a kind of high-strength directional particieboard that production method described in the embodiment of the present invention obtains The every field such as substrate, toilet, kitchen, outdoor wooden structural building, corridor, container.
High-strength directional of the invention is dug according to detection method as defined in GB18580-2001 and LY/T1580-2010 Card is detected, and the result of detection is as shown in table 3 below:
Table 3: high-strength directional particieboard testing result of the present invention
The measuring method of burst size of methanal of the present invention is all made of Extraction method.
In conclusion may be used as floor base material, toilet, kitchen, outdoor wood by high-strength panel produced by the invention The every field such as matter structural building, corridor, container, thoroughly solving oriented wood chipboard cannot be used for other than indoor furniture finishing Problem, extend its application range further.
Unless otherwise indicated, percentage of the present invention is weight percent, and ratio of the present invention is Mass ratio;The parallel static bending strength is to be parallel to the static bending strength in production line direction of mating formation;The vertical static bending strength, For the static bending strength perpendicular to production line direction of mating formation;The parallel bending elastic modulus, to be parallel to production line side of mating formation To bending elastic modulus;The vertical curve elasticity modulus, for the bending elastic modulus perpendicular to production line direction of mating formation.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, It, for those skilled in the art, still can be with although describing the invention in detail with reference to the foregoing embodiments It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in guarantor of the invention Within the scope of shield.

Claims (1)

1. a kind of high-strength directional particieboard, which is characterized in that the high-strength directional particieboard, the mass ratio on surface layer and sandwich layer It is 55%/45%;
Expansion rate of water absorption 4.11%;
Moisture content 3.5%;
Internal bond strength is 2.52Mpa, and parallel bending elastic modulus is 9945MPa, and vertical curve elasticity modulus is 3621MPa;
Parallel static bending strength is 64.25MPa, and vertical static bending strength is 27.36Mpa;
The production method of the high-strength directional particieboard, including raw material prepare, dry, are glued, mating formation, hot pressing;
Raw material preparation, chipper it is 32 ° of material fly cutter sharpening angle long, reversed nose angle degree is 75 °;The knife ring revolving speed of chipper 300-420rpm, it is 0.5-0.8 ㎜ that fly cutter, which stretches knife amount,;
The raw material is long-log sheer, length 60-130mm, thickness 0.45-0.65mm, width 15-30mm;
The raw material of the long-log sheer are eucalyptus;
The drying, moisture content≤3.5% after drying;
Surface layer wood shavings length 100-130mm, width 20-30mm;
Sandwich layer wood shavings length 60-120mm, width 15-25mm;
The sizing, to apply the more phenol isocyanates of polymethylene, resin added 7.0% is glued later moisture content are as follows: table Layer wood shavings: 11%, sandwich layer wood shavings: 6%;
Described to mat formation, the accounting of the angle within the scope of 90 ± 10 ° of mating formation on sandwich layer and the surface layer is 90% or more;Sandwich layer is dug Mat formation with production line direction at 90o on flower edge;Density of mating formation is 710kg/m3;Measuring chute material position of mating formation is not less than 60% material position; Moisture content after mating formation is surface layer slab: 11%, sandwich layer slab: 6%;
The hot pressing, sprinkling on the surface of mat amount are 40 ㎎/㎡, release agent stoste in release agent solution: water=1:2, release agent solution Dosage on slab is 3L/ ㎡;Press speed is 300mm/s;The platen temperature in press temperature control region is respectively 245 DEG C, 240 ℃、225℃、185℃、165 ℃。
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CN108177228A (en) * 2018-02-10 2018-06-19 寿光市鲁丽木业股份有限公司 A kind of high-strength shaving board and preparation method thereof
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