CN109049263A - A kind of crops stalk mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed - Google Patents
A kind of crops stalk mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed Download PDFInfo
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- CN109049263A CN109049263A CN201811215260.5A CN201811215260A CN109049263A CN 109049263 A CN109049263 A CN 109049263A CN 201811215260 A CN201811215260 A CN 201811215260A CN 109049263 A CN109049263 A CN 109049263A
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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
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
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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
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The present invention provides a kind of manufacturing method of crops stalk mixing Formaldehyde Free Wood-based Panel processed, it is characterized in that, the following steps are included: step 1, numb crop stem is crushed, it is that 3%~5% formaldehydeless modifying agent of numb crop stem is stirred that 3%~8% the first polymeric MDI glue that weight is numb crop stem and weight, which is added,；Step 2 crushes cotton stalk, and it is that 2%~5% formaldehydeless modifying agent of cotton stalk is stirred that 2%~6% the second polymeric MDI glue that weight is cotton stalk and weight, which is added,；Step 3, using the cotton stalk after being stirred as sandwich layer, numb crop stem as surface layer, place Min layers dress up slab；Step 4, by slab compression moulding, then post-treated obtained wood-based plate.
Description
Technical field
The present invention relates to Formaldehyde Free Wood-based Panel technical field, in particular to a kind of cotton stalk is as surface layer, numb stem of plant
Manufacturing method of the stalk as the Formaldehyde Free Wood-based Panel of sandwich layer.
Background technique
Conventional artificial's plate is made using timber of raw material, such as glued board, fiberboard, particieboard, core-board, orientation knot
Structure plate etc..With economic development, people increase severely to timber demand, are fallen trees on a large scale so that ecological environment is seriously broken
It is bad, also timber resources is caused to fall sharply, influences the raw material sources of wood-based plate.For this purpose, being replaced by seeking other natural fiber materials
It is a kind of development trend for timber manufacture wood-based plate.Currently, having had artificial using wheat stalk wood-based plate, corn stover system
Plate etc., but the wood-based plate of this single raw material manufacture has that resin added is big, at high cost, and it is big to affect such wood-based plate
Scale industrialization application.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of crops stalk mixing system is without first
The manufacturing method of aldehyde wood-based plate.
Crops stalk provided by the invention mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed, has the feature that, wraps
Include following steps:
Step 1 crushes numb crop stem, and 3%~8% the first polymeric MDI glue that weight is numb crop stem is added
And weight is stirred for 3%~5% formaldehydeless modifying agent of numb crop stem, obtains hemp stalk mixture；
Step 2 crushes cotton stalk, be added weight be cotton stalk 2%~6% the second polymeric MDI glue and
Weight is that 2%~5% formaldehydeless modifying agent of cotton stalk is stirred, and obtains cotton stalk mixture；
Step 3, using the cotton stalk after being stirred as sandwich layer, numb crop stem as surface layer, according to surface layer, core
Layer, surface layer place Min layers dress up slab；
Step 4, by slab compression moulding, then post-treated obtained wood-based plate.
Above-mentioned steps one synchronous can be carried out with step 2.
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where numb crop stem is crushed to 50~70 mesh fineness in step 1, and cotton stalk is crushed to 10~40 in step 2
Mesh fineness, the resin added of the first polymeric MDI glue are greater than the resin added of the second polymeric MDI glue.
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where numb crop stem first passes through coarse crushing in step 1, then re-dry to water content 9%~17% carries out thin
It is crushed to 50~70 mesh；Cotton stalk first passes through coarse crushing in step 2, then re-dry to water content 7%~12% carries out
Fine powder is broken to 10~40 mesh.
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where numb crop stem preferably be selected from bluish dogbane stalk, jute stalk, Chinese anesthesia stem, in flax stalk any one or
Several mixtures.
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where the first polymeric MDI glue is prepared by the substance comprising following mass percent:
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where the second polymeric MDI glue is prepared by the substance comprising following mass percent:
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where polyalcohol is selected from one or several any mixture of ethylene glycol, 1,2-PD, glycerol；Components of biomass
It preferably is selected from soy meal, wheat flour, cornstarch, tapioca, one or several any mixture in potato starch.
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where formaldehydeless modifying agent includes the substance of following components:
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where the acrylate preferably be selected from methyl acrylate, ethyl acrylate, butyl acrylate, Isooctyl acrylate monomer,
Any one or a few mixture in ethyl methacrylate；The alkali metal filler material preferably is selected from calcium silicates, sodium metasilicate
In any one or two kinds mixture；The nano-oxide be one of nano zine oxide, nano-titanium dioxide or
Two kinds of mixture.
In the manufacturing method that crops stalk provided by the invention mixes Formaldehyde Free Wood-based Panel processed, can also have in this way
Feature: where step 4 is specifically includes the following steps: step 4-1, in room temperature, 250~500kN/m2It is used under pressure condition
Drum-type preformer carries out continuous precompressed to slab；Step 4-2, the slab after precompressed is sent into layering hot press, 150~180
DEG C temperature, 2400~3500kN/m22~8min of hot pressing is solidified into hair plates under conditions of pressure；Step 4-3, the hair plates after hot pressing
Sawing, cooling, health, sanding are successively carried out, to obtain finished synthetic's plate.
Action and effect of the invention:
The manufacturing method that crops stalk of the present invention mixes Formaldehyde Free Wood-based Panel processed takes full advantage of numb crop stem and cotton
The two is ground into different fineness in conjunction with specific technical process by the property of raw material of scape stalk, respectively with polymeric MDI glue and
Formaldehydeless modifying agent is mutually stirred, and using numb crop stem as surface layer, cotton stalk as sandwich layer, so that slab is in room temperature
The pre-molding enhanced strength of state is easy to use continuous precompressed mode to produce, improves efficiency, profiled sheeting function admirable obtained,
The quality of timber wood-based plate is met or exceeded, convenient for being widely used.
Crops stalk of the present invention mixes polymeric MDI glue and Wu Jia employed in the manufacturing method of Formaldehyde Free Wood-based Panel processed
The problem of aldehyde modifying agent is all free of formaldehyde, and wood-based plate obtained in this way is detrimental to health there is no release formaldehyde.
Stalk is by coarse crushing and finely divided, and strict control its moisture content, sufficiently crushes and obtains being suitable for fineness, sufficiently
Increase the bonding area of stalk and formaldehydeless modifying agent and polymeric MDI glue.Sandwich layer cotton stalk and surface layer fiber crops crop stem
Resin added is different, and such resin application methods make the dosage of formaldehydeless modifying agent and polymeric MDI glue well below usual amounts
It can reach adhesion strength requirement.
Methyl diphenylene diisocyanate and polyphenyl polymethylene polyisocyanates are under hot pressing temperature in polymeric MDI glue
It crosslinks and reacts with ingredients such as stalk lignin, celluloses, so that slab more preferably forms.Soybean is used in polymeric MDI glue
The components of biomass such as powder are crosslinked with polyvinyl alcohol in formaldehydeless modifying agent to react, and components of biomass is green non-poisonous, improves paste
Change effect, plybonding effect.Glycerine monofatty ester facilitate improve polymeric MDI glue mobility, facilitate polymeric MDI glue with
It stirs evenly and comes into full contact with when stalk is stirred.Acrylic acid and polymeric MDI glue in formaldehydeless modifying agent is under hot pressing temperature
The isocyano of formation and the reaction of moisture in stalk form reticular structure and improve intensity, reduce wood-based plate water swelling
Rate.Alkali metal filler material is used in formaldehydeless modifying agent, increases the intensity of wood-based plate, adjusts reaction pH value, is improved anti-
Answer efficiency.Nano-oxide increases mixture mechanics, thermal property at high temperature, improves plybonding effect, makes it have persistently viscous
Relay helps to improve the service life of wood-based plate in addition, nano-oxide may also function as the effect of bacteria mildew-proof.
Detailed description of the invention
Fig. 1 is the process flow for the manufacturing method that the embodiment of the present invention middle peasant crop stem mixes Formaldehyde Free Wood-based Panel processed
Figure.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
The manufacturing method that example combination attached drawing mixes Formaldehyde Free Wood-based Panel processed to crops stalk of the present invention is applied to be specifically addressed.
<embodiment 1>
Step 1: bluish dogbane stalk disintegrating is first passed through into coarse crushing, the stalk of coarse crushing is dried through roller dryer, makes
Its moisture content is in 9%~17% range.Bluish dogbane stalk raw material after drying is miscellaneous using the equipment such as selection by winnowing removal iron, stone etc.
Enter slimer after matter and be crushed to 50~70 mesh fineness, is sent into surface layer feed bin.Bluish dogbane stalk in surface layer feed bin is claimed
Weight, and be sent in the first blender after measuring its moisture content by moisture tester, it is sprayed using PLC control glue-spraying device
Glue sprays into 3% the first polymeric MDI glue that weight is bluish dogbane stalk dry weight and again according to corresponding Weight control glue spraying amount
Amount is that 3% formaldehydeless modifying agent of bluish dogbane stalk dry weight is stirred.
Step 2: synchronous with step 1 to carry out.Cotton stalk crushing is first passed through into coarse crushing, the stalk of coarse crushing is through drum-type
Dryer is dried, and makes its moisture content in 9%~17% range.Cotton stalk raw material after drying is set using selection by winnowing etc.
Enter slimer after the impurity such as standby removal iron, stone and be crushed to 10~40 mesh fineness, is sent into sandwich layer feed bin.It will be in sandwich layer feed bin
Cotton stalk weigh, and be sent in the second blender after measuring its moisture content by moisture tester, controlled using PLC
Glue-spraying device processed carries out glue spraying, according to corresponding Weight control glue spraying amount, sprays into the second of weight is cotton stalk dry weight 2%
Polymeric MDI glue and weight are that 2% formaldehydeless modifying agent of cotton stalk dry weight is stirred.
Step 3: it using the cotton stalk after being stirred as sandwich layer, bluish dogbane stalk as surface layer, is sent by conveyer to not
Same spreading machine carries out layering and mats formation, and forms slab on rubber load-bearing conveyer belt.
Step 4: rubber load-bearing conveyer belt is together with slab thereon, in room temperature, 300kN/m2Roller is used under pressure condition
Formula preformer carries out continuous precompressed, is formed compared with stable state slab.Slab after precompressed is sent by rubber load-bearing conveyer belt to be layered
Hot press is in 160 DEG C of temperature, 3500kN/m2Hot-press solidifying is at hair plates under conditions of pressure.Hair plates after hot pressing is successively sawed
It cuts, cool down, health, the aftertreatment technologies such as sanding, obtaining profiled sheeting.
First polymeric MDI glue used in the present embodiment is prepared by the substance comprising following mass percent: hexichol
Dicyclohexylmethane diisocyanate 35%；Polyphenyl polymethylene polyisocyanates 39.7%；Ethylene glycol 12%；1,2-PD 7%；
Glycerol 6%；Soy meal 0.2%；Wheat flour 0.1%.
Second polymeric MDI glue is prepared by the substance comprising following mass percent: methyl diphenylene diisocyanate
30.5%；Polyphenyl polymethylene polyisocyanates 50%；Glycerine monofatty ester 9%；Ethylene glycol 3.5%；1,2-PD
2%；Soy meal 2%；Cornstarch 2%；Tapioca 1%.
Formaldehydeless modifying agent includes the substance of following components: acrylate 58%；Polyvinyl alcohol 30%；Calcium silicates 3%；
Sodium metasilicate 4%；Nano zine oxide 5%.
<embodiment 2>
Step 1: jute stalk disintegrating is first passed through into coarse crushing, the stalk of coarse crushing is dried through roller dryer, makes
Its moisture content is in 9%~17% range.Jute stalk raw material after drying is miscellaneous using the equipment such as selection by winnowing removal iron, stone etc.
Enter slimer after matter and be crushed to 50~70 mesh fineness, is sent into surface layer feed bin.Jute stalk in surface layer feed bin is claimed
Weight, and be sent in the first blender after measuring its moisture content by moisture tester, it is sprayed using PLC control glue-spraying device
Glue sprays into 5% the first polymeric MDI glue that weight is jute stalk dry weight and again according to corresponding Weight control glue spraying amount
Amount is that 4% formaldehydeless modifying agent of jute stalk dry weight is stirred.
Step 2: synchronous with step 1 to carry out.Cotton stalk crushing is first passed through into coarse crushing, the stalk of coarse crushing is through drum-type
Dryer is dried, and makes its moisture content in 9%~17% range.Cotton stalk raw material after drying is set using selection by winnowing etc.
Enter slimer after the impurity such as standby removal iron, stone and be crushed to 10~40 mesh fineness, is sent into sandwich layer feed bin.It will be in sandwich layer feed bin
Cotton stalk weigh, and be sent in the second blender after measuring its moisture content by moisture tester, controlled using PLC
Glue-spraying device processed carries out glue spraying, according to corresponding Weight control glue spraying amount, sprays into the second of weight is cotton stalk dry weight 4%
Polymeric MDI glue and weight are that 3% formaldehydeless modifying agent of cotton stalk dry weight is stirred.
Step 3: it using the cotton stalk after being stirred as sandwich layer, jute stalk as surface layer, is sent by conveyer to not
Same spreading machine carries out layering and mats formation, and forms slab on rubber load-bearing conveyer belt.
Step 4: rubber load-bearing conveyer belt is together with slab thereon, in room temperature, 250kN/m2Roller is used under pressure condition
Formula preformer carries out continuous precompressed, is formed compared with stable state slab.Slab after precompressed is sent by rubber load-bearing conveyer belt to be layered
Hot press is in 180 DEG C of temperature, 2400kN/m2Hot-press solidifying is at hair plates under conditions of pressure.Hair plates after hot pressing is successively sawed
It cuts, cool down, health, the aftertreatment technologies such as sanding, obtaining profiled sheeting.
First polymeric MDI glue used in the present embodiment is prepared by the substance comprising following mass percent: hexichol
Dicyclohexylmethane diisocyanate 36%；Polyphenyl polymethylene polyisocyanates 48%；Ethylene glycol 11%；Cornstarch 2%；Cassava
Starch 2%；Potato starch 1%.
Second polymeric MDI glue is prepared by the substance comprising following mass percent: methyl diphenylene diisocyanate
60%；Polyphenyl polymethylene polyisocyanates 28%；Glycerine monofatty ester 6%；Ethylene glycol 2%；1,2-PD 3%；
Tapioca 1%.
Formaldehydeless modifying agent includes the substance of following components: methyl acrylate 20%；Ethyl acrylate 20%；Acrylic acid
Butyl ester 15%；Isooctyl acrylate monomer 17%；Polyvinyl alcohol 26%；Calcium silicates 0.5%；Nano-titanium dioxide 1.5%.
<embodiment 3>
Step 1: jute stalk, Chinese anesthesia stem, flax stalk disintegrating are first passed through into coarse crushing, the stalk of coarse crushing is through roller
Formula dryer is dried, and makes its moisture content in 9%~17% range.Mixing anesthesia stem raw material after drying is using selection by winnowing
Etc. enter slimer after equipment removal iron, the impurity such as stone and be crushed to 50~70 mesh fineness, be sent into surface layer feed bin.By capstock
Mixing anesthesia stem in storehouse is weighed, and is sent in the first blender after measuring its moisture content by moisture tester, is adopted
Glue spraying is carried out with PLC control glue-spraying device, according to corresponding Weight control glue spraying amount, spraying into weight is mixing anesthesia stem dry weight
8% the first polymeric MDI glue and weight is that the formaldehydeless modifying agent of mixing anesthesia stem dry weight 5% is stirred.
Step 2: synchronous with step 1 to carry out.Cotton stalk crushing is first passed through into coarse crushing, the stalk of coarse crushing is through drum-type
Dryer is dried, and makes its moisture content in 9%~17% range.Cotton stalk raw material after drying is set using selection by winnowing etc.
Enter slimer after the impurity such as standby removal iron, stone and be crushed to 10~40 mesh fineness, is sent into sandwich layer feed bin.It will be in sandwich layer feed bin
Cotton stalk weigh, and be sent in the second blender after measuring its moisture content by moisture tester, controlled using PLC
Glue-spraying device processed carries out glue spraying, according to corresponding Weight control glue spraying amount, sprays into the second of weight is cotton stalk dry weight 6%
Polymeric MDI glue and weight are that 4% formaldehydeless modifying agent of cotton stalk dry weight is stirred.
Step 3: using the cotton stalk after being stirred as sandwich layer, mixing anesthesia stem as surface layer, by conveyer send to
Different spreading machines carries out layering and mats formation, and forms slab on rubber load-bearing conveyer belt.
Step 4: rubber load-bearing conveyer belt is together with slab thereon, in room temperature, 500kN/m2Roller is used under pressure condition
Formula preformer carries out continuous precompressed, is formed compared with stable state slab.Slab after precompressed is sent by rubber load-bearing conveyer belt to be layered
Hot press is in 150 DEG C of temperature, 2800kN/m2Hot-press solidifying is at hair plates under conditions of pressure.Hair plates after hot pressing is successively sawed
It cuts, cool down, health, the aftertreatment technologies such as sanding, obtaining profiled sheeting.
First polymeric MDI glue used in the present embodiment is prepared by the substance comprising following mass percent: hexichol
Dicyclohexylmethane diisocyanate 65%；Polyphenyl polymethylene polyisocyanates 25%；Ethylene glycol 3%；1,2-PD 5%；It is beautiful
Rice starch 2%.
Second polymeric MDI glue is prepared by the substance comprising following mass percent: methyl diphenylene diisocyanate
30%；Polyphenyl polymethylene polyisocyanates 37.5%；Glycerine monofatty ester 7.2%；Ethylene glycol 15%；1,2-PD
5%；Glycerol 5%；Cornstarch 0.3%.
Formaldehydeless modifying agent includes the substance of following components: methyl acrylate 40%；Ethyl acrylate 10%；Acrylic acid
Different monooctyl ester 20%；Ethyl methacrylate 10%；Polyvinyl alcohol 5%；Calcium silicates 5%；Sodium metasilicate 5%；Nano zine oxide 2%；
Nano-titanium dioxide 3%.
Finished synthetic's plate made from Examples 1 to 3 is tested for the property, test result is as follows table:
Above embodiment is concrete case of the invention, the protection scope being not intended to limit the invention.
Claims (10)
1. the manufacturing method that a kind of crops stalk mixes Formaldehyde Free Wood-based Panel processed, which comprises the following steps:
Step 1 crushes numb crop stem, and 3%~8% the first polymeric MDI glue that weight is the numb crop stem is added
And weight is stirred for 3%~5% formaldehydeless modifying agent of the numb crop stem；
Step 2 crushes cotton stalk, be added weight be the cotton stalk 2%~6% the second polymeric MDI glue and
Weight is that 2%~5% formaldehydeless modifying agent of the cotton stalk is stirred；
Step 3, the cotton stalk after being stirred is as sandwich layer, the numb crop stem as surface layer, according to face
Layer, sandwich layer, surface layer place Min layers dress up slab；
Step 4, by the slab compression moulding, then post-treated obtained wood-based plate.
2. the manufacturing method that crops stalk according to claim 1 mixes Formaldehyde Free Wood-based Panel processed, it is characterised in that:
Wherein, fiber crops crop stem described in step 1 are crushed to 50~70 mesh fineness, and cotton stalk described in step 2 is crushed to
10~40 mesh fineness,
The resin added of the first polymeric MDI glue is greater than the resin added of the second polymeric MDI glue.
3. the manufacturing method that crops stalk according to claim 2 mixes Formaldehyde Free Wood-based Panel processed, it is characterised in that:
Wherein, fiber crops crop stem described in step 1 first pass through coarse crushing, re-dry to water content 9%~17%, then into
Row fine powder is broken to 50~70 mesh；
Cotton stalk described in step 2 first passes through coarse crushing, and re-dry to water content 7%~12% is then finely divided in progress
To 10~40 mesh.
4. crops stalk according to any one of claims 1 to 3 mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed,
It is characterized by:
Wherein, the numb crop stem preferably is selected from bluish dogbane stalk, jute stalk, Chinese anesthesia stem, any one in flax stalk
Or several mixture.
5. the manufacturing method that crops stalk according to claim 1 mixes Formaldehyde Free Wood-based Panel processed, it is characterised in that:
Wherein, the first polymeric MDI glue is prepared by the substance comprising following mass percent:
6. the manufacturing method that crops stalk according to claim 1 mixes Formaldehyde Free Wood-based Panel processed, it is characterised in that:
Wherein, the second polymeric MDI glue is prepared by the substance comprising following mass percent:
7. crops stalk according to claim 5 or 6 mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed, feature exists
In:
Wherein, the components of biomass preferably is selected from soy meal, wheat flour, cornstarch, tapioca, appointing in potato starch
It anticipates one or several mixture.
8. the manufacturing method that crops stalk according to claim 1 mixes Formaldehyde Free Wood-based Panel processed, it is characterised in that:
Wherein, the formaldehydeless modifying agent includes the substance of following components:
9. the manufacturing method that crops stalk according to claim 8 mixes Formaldehyde Free Wood-based Panel processed, it is characterised in that:
Wherein, the acrylate preferably is selected from methyl acrylate, ethyl acrylate, butyl acrylate, Isooctyl acrylate monomer, methyl
Any one or a few mixture in ethyl acrylate,
The alkali metal filler material preferably is selected from the mixture of calcium silicates, any one or two kinds in sodium metasilicate,
The nano-oxide is the mixture of one or both of nano zine oxide, nano-titanium dioxide.
10. the manufacturing method that crops stalk according to claim 1 mixes Formaldehyde Free Wood-based Panel processed, it is characterised in that:
Wherein, step 4 specifically includes the following steps:
Step 4-1 carries out continuously the slab using drum-type preformer under room temperature, 250~500kN/m2 pressure condition
Precompressed；
Step 4-2, the slab after precompressed is sent into layering hot press, in 150~180 DEG C of temperature, 2400~3500kN/m2Pressure
Under the conditions of 2~8min of hot pressing be solidified into hair plates；
Step 4-3, the hair plates after hot pressing successively carries out sawing, cooling, health, sanding, to obtain finished synthetic's plate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115674393A (en) * | 2022-11-08 | 2023-02-03 | 上海康拜环保设备有限公司 | Formaldehyde-free high-strength cotton stalk particle board and manufacturing method thereof |
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