CN106313205B - The method that particieboard is produced using moisture-proof composite urea formaldehyde resin - Google Patents
The method that particieboard is produced using moisture-proof composite urea formaldehyde resin Download PDFInfo
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- CN106313205B CN106313205B CN201610746930.0A CN201610746930A CN106313205B CN 106313205 B CN106313205 B CN 106313205B CN 201610746930 A CN201610746930 A CN 201610746930A CN 106313205 B CN106313205 B CN 106313205B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- 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
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0227—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer
-
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09J161/32—Modified amine-aldehyde condensates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B2037/1269—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives multi-component adhesive
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The processes such as the invention discloses the methods for producing particieboard using moisture-proof composite urea formaldehyde resin, including stock up, and dry, peeling desanding, sorting polishing, tune glue mixing are hot-forming.The key of production method of the present invention is to use cyanurotriamide modified urea resin for adhesive major ingredient, and addition oxidized starch is sticky complexing agent；Polyvinyl alcohol is toughener；Magnesia is age resister；Hexa and isocyanuric acid three-glycidyl ester are curing agent；Vinyltriethoxysilane is bridging agent；Phenolate lignin is formaldehyde catching agent and adds the moisture-proof composite urea formaldehyde resin that anti-blushing agent is prepared again, the composite urea formaldehyde resin has residual formaldehyde amount low, advantage water-fast, moisture resistance is good, to keep residual formaldehyde amount in the particieboard that production obtains low, it is not easy to expand after water suction, it is not easy deformation of arching upward, wearing layer is not readily susceptible to destroy.The particieboard content of formaldehyde that the method for the present invention produces is low, and the stable quality of plate, it is not easy to it damages, it is water-fast, moisture resistance is good.
Description
Technical field
The invention belongs to wood-based plate manufacturing field, especially a kind of side producing particieboard using moisture-proof composite urea formaldehyde resin
Method.
Background technology
Particieboard is an important board kind in wood-based plate, and compared with other plate kinds, its investment of production is relatively fewer, energy consumption
Small, at low cost, the requirement to material quality is not also high, and three surplus objects, fast growing wood, recycling waste and old wood and some non-wooden materials are all
There can be its unique advantage as the raw material of particieboard, therefore in the Chinese development particieboard industry of timber resources scarcity.Plane
To intersect the graininess of structure straggly inside card, the performance in each portion direction is essentially identical, and lateral bearing capacity is good；Surface of chipboard
Smooth, texture is true to nature, and unit weight is uniform, and thickness error is small, and anti-pollution is ageing-resistant, beautiful, can carry out various veneers；Particieboard exists
In production process, glue consumption is smaller, and environmentally friendly coefficient is relatively high.Since particieboard volume is larger, with its Hepplewhite, relatively
For other planks, also than heavier.Because particieboard have it is so many a little, therefore it is widely used in Furniture manufacture, building, packet
Dress, the interior decoration of vehicle and ship and household appliance shell making etc., facing particieboard can be also made through secondary operation.But
It is since particieboard is a kind of wood materials, poor water resistance makes bow warping deform after moisture absorption because generating expansive force difference.Cause
This, improves the water resistance of Lauxite, reduces residual formaldehyde, becomes particieboard industry development and primarily solve the problems, such as.
Patent in terms of retrieving below in relation to particieboard is produced with Lauxite：
Denomination of invention：Urea-formaldehyde resin adhesive and preparation method thereof for bagasse particieboard；Abstract：The invention discloses one
Urea-formaldehyde resin adhesive and preparation method thereof of the kind for bagasse particieboard, including the raw material of following parts by weight are made：Formaldehyde is molten
Liquid 3100-3300 parts by weight；Urea liquid 1. 1000-1200 parts by weight；Urea liquid 2. 450-550 parts by weight；Urea liquid
3. 500-600 parts by weight and modified rubber latex 90-110 parts by weight.Preparation method is：Life is not dehydrated using alkali-Acid-Base
Production. art, and the latex after silane coupler modified is added in the late phase reaction of synthesis Lauxite, further improve
The ageing-resistant performance of Lauxite.Reach 0 .1% by the urea-formaldehyde glue free formaldehyde mass fraction of the technique productions hereinafter, system
At bagasse particieboard burst size of methanal be 20mg/100g, reached 30mg/100g E2 grades of national standard below.
The adhesive that above-mentioned patent is prepared does not have waterproof moisture-proof effect, urea-formaldehyde resin adhesive only will be through silane coupled
The modified latex of agent is added in the late phase reaction of synthesis Lauxite, achievees the purpose that introduce Si-O keys so that final to close
At urea-formaldehyde resin adhesive can form Si-O-Si keys during drying and forming-film, improve while top sizing is spent and increase
The mechanical strength of its big latex film, but it does not improve the waterproof moisture-proof effect of urea-formaldehyde resin adhesive.
Inventor has carried out numerous studies to waterproof and dampproof urea-formaldehyde resin adhesive, finds the urea through cyanurotriamide modified mistake
Urea formaldehyde has good waterproof moisture-proof effect.Cyanurotriamide modified urea resin is modified on the basis of Lauxite
It is made, Lauxite has many advantages, such as that raw material is cheap and easy to get, solidification temperature is without stringent limitation, but Lauxite boiling water resistance and resists
Aging is poor, because there are hydrophilic free methylol in the resin after its solidification, they are easily combined with water.And band ring-type point
The melamine of son is introduced into Lauxite, is formed tridimensional network, is enclosed many hydrophilic radicals, change resin matrix
Structure promotes resin crosslinking, to achieve the purpose that improve adhesion strength, water resistance and the ageing resistance of resin, simultaneously
In turn avoid the simple higher disadvantage of melamine resin cost.
Invention content
For above-mentioned technological deficiency, wood shavings are produced using moisture-proof composite urea formaldehyde resin the purpose of the present invention is a kind of
The method of plate, the particieboard content of formaldehyde produced by the method for the invention is low, and the stable quality of plate, it is not easy to damage
It is bad, it is water-fast, moisture resistance is good.
The key of production method of the present invention is to use cyanurotriamide modified urea resin for adhesive major ingredient, and addition oxidation is formed sediment
Powder is sticky complexing agent；Polyvinyl alcohol is toughener；Magnesia is age resister；Hexa and isocyanuric acid three shrink
Glyceride is curing agent；Vinyltriethoxysilane is bridging agent；Phenolate lignin is formaldehyde catching agent and adds again moisture-proof
The moisture-proof composite urea formaldehyde resin that agent is prepared, the composite urea formaldehyde resin have residual formaldehyde amount low, good excellent of water-fast, moisture resistance
Point, residual formaldehyde amount is low to making in the particieboard that production obtains, and is not easy to expand after water suction, it is not easy to deformation of arching upward, it is wear-resisting
Layer is not readily susceptible to destroy.And in process of production, ensure production by strictly controlling the technological parameter in production process
The quality of particieboard.
To achieve the purpose of the present invention, the present invention adopts the following technical scheme that：
The method for producing particieboard using moisture-proof composite urea formaldehyde resin, preparation process include the following steps：
1）By unavailable waste material during multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate with transport after simple screening
Machine, which is sent in chipper, carries out wood shavings, then is sent to progress transition storage in wet wood shavings feed bin through transporter；The water content of wet wood shavings
Percent by weight should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings 10%
Below；
3）By the wood shavings after drying with isolating wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is in 2 centimetres of dry wood shavings of watch core layer below through transporter
It is sent to the dry wood shavings material transitional storehouse storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings of watch core layer after smashing again
Expect transitional storehouse storage；
5）The qualified dry wood shavings of watch core layer are transported through transporter, are sent in glue mixer after the metering of chip metering feed bin, simultaneously
Adjust glue mixing workshop section that the moisture-proof composite urea formaldehyde resin adhesive required by technique is sent in glue mixer, wood shavings and moisture-proof compound ureaformaldehyde
Resin adhesive achievees the effect that uniformly mixing is fully glued, wood shavings particle accounts for plate under being sufficiently stirred of watch core layer glue mixer
The 85-90% of material dry weight, moisture-proof composite urea formaldehyde resin adhesive and additive account for 10-15%；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation by mechanical classification unit of mating formation
The particle mat of uniform ground determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.8~0.9MPa, 5~8min of time；Finally carry out
Hot pressing, 2.5~3MPa of hot pressing pressure, temperature are 200~210 DEG C, and hot pressing time is every millimeter of plate thickness 80s~85s, is then sent
To quenched, obtained particieboard in balance library.
Step 5）The additive is any one of titanium dioxide, talcum powder and white carbon.
Step 5）The moisture-proof composite urea formaldehyde resin adhesive, is made of the raw material of following parts by weight：
50~100 parts of cyanurotriamide modified urea resin；
20~30 parts of oxidized starch；
1~3 part of polyvinyl alcohol；
3~8 parts of magnesia；
2~3 parts of propanediol polyoxypropylene polyvinylether；
2~3 parts of hexa；
1~2 part of isocyanuric acid three-glycidyl ester；
0.5~5 part of vinyltriethoxysilane；
5~10 parts of phenolate lignin；
100~200 parts of clear water；
2~5 parts of anti-blushing agent.
The anti-blushing agent is paraffin wax emulsions, and using the product of Ren Xin plastic molding and processing plants of Wenan County production, Corporation web site is：
http://show.guidechem.com/renxin/pro-show5725830.html, paraffin wax emulsions appearance are that milky is equal
Matter liquid, solid content 40-42%, pH value 6-7, storage-stable is more than 24 months under air-proof condition.Ren Xin plastic molding and processing plants of Wenan County
The paraffin wax emulsions of development and production belong to electrostatic nanoemulsions, and can be repelled by positive electricity makes lotion caking phenomenon do not occur, breast
Liquid particle is tiny to arrive nanometer, and the water resistance of particieboard is stronger, and surface flatness is more preferable.Suggested use and dosage：It will at sizing scene
Waterproofing agent is added in glue, now with the current, is suitable for the water-proofing treatment to particieboard.
Cyanurotriamide modified urea resin of the present invention is using the cyanurotriamide modified urea resin bought in the market.
Above-described moisture-proof composite urea formaldehyde resin adhesive, the function of each raw material are as follows：
Cyanurotriamide modified urea resin is adhesive major ingredient.Urea-formaldehyde resin adhesive is a kind of thermosetting polymer glue
Stick.The advantages that since its is simple for process, raw material is cheap, and adhesive strength is high, water white transparency is widely used in glued board, plane
The industries such as card, medium density fibre board (MDF), the production of artificial board and interior decoration can be bought in Market of Adhesives.Band
The melamine of shape molecule is introduced into Lauxite, is formed tridimensional network, is enclosed many hydrophilic radicals, change resin
Skeleton structure promotes resin crosslinking, to achieve the purpose that improve adhesion strength, water resistance and the ageing resistance of resin,
In turn avoid the simple higher disadvantage of melamine resin cost simultaneously.
Oxidized starch is that starch acts in acid, alkali, neutral medium with oxidant, makes a kind of change obtained from starch oxidation
Property starch.Oxidized starch product colour is pure white, pastes transparent, good film-forming property, freeze-thaw resistance is good, is the thickening of low viscosity high concentration
Agent is widely used in weaving, papermaking, food and Fine Chemical.Oxidized starch carries more aldehyde radical and carboxyl, can be multiple
During closing Lauxite polymer reaction, acetal and hemiacetal structure are generated, to improve the ageing-resistant performance of Lauxite；
Simultaneous oxidation starch can be combined with the free formaldehyde in cyanurotriamide modified urea resin, can reduce free formaldehyde content；Oxidation
On the other hand starch, and can be used as sticky complexing agent, can reduce cyanurotriamide modified urea resin addition, reduce production
Cost.
Polyvinyl alcohol is toughener so that the strength of shaving boards produced increases.
Magnesia is antioxidant so that the particieboard produced is not allowed perishable, extends the service life, anti-aging also may be used
To increase viscosity.
Propanediol polyoxypropylene polyvinylether is antifoaming agent, prevents having the generation of bubble cavity during adhesive use.
Hexa and isocyanuric acid three-glycidyl ester are curing agent.
Bridging agent selects vinyltriethoxysilane, and one end can be combined with Lauxite carbonyl, and the other end can be with
The hydroxy combining of starch enhances its plank intensity.
Paraffin wax emulsions are various waxes including pertroleum wax through a kind of uniform flow that the content of wax is aqueous made of physical modification
Body is paraffin and several variety classes, the emulsifier of performance and conditioning agent appropriate through solid-oil-water made of emulsion reaction
The stable emulsion of multiphase dispersion.Paraffin wax emulsions and sizing material mix together, and plank is made to have a water resisting property and improve surface light
Cleanliness.Since paraffin wax emulsions granularity is small, in artificial board manufacturing process, by being effectively demulsified, small Wax particles can be made
It is precipitated from water phase, is equably adsorbed on wood-fibred, in developed country, can not find one piece of wood shavings for not having to emulsifying wax production
Plate and fiberboard.
Present invention adds paraffin wax emulsions, and the moisture-proof composite urea formaldehyde resin adhesive that production obtains is allow to reduce wood-based plate
Depth of moisture absorption of expansion ratio.And inventor is added by contrast test in producing urea-formaldehyde resin adhesive used for shaving board
Paraffin wax emulsions, can be obviously improved the water proofing property of particieboard, and depth of moisture absorption of expansion ratio averagely reduces by 40% or more, and other every objects
It manages index and changes unobvious.
Lignin molecular mass after phenolate is reacted reduces, and increases reaction active groups, can eliminate part free formaldehyde.
The preparation method of phenolate lignin is：It will be placed in separation vessel using the black liquid of alkaline boiling method slurrying, removed with sieve
Undissolved suspended matter settles 4 hours after stirring, discharge lower layer silt, takes black liquor vacuum drying of the upper layer containing alkali lignin
Machine carries out vacuum spray drying processing, obtains powdery alkali lignin；It takes powdery alkali lignin to be put into acidifier, is added
70wt% sulfuric acid after stirring evenly, is warming up to 140-160 DEG C, sulfonating reaction 1-2 hours；It is evaporated by standard vertical-tubes
Device, circulation rate 0.4m/s-0.5m/s, control discharging moisture are 30wt%, precipitation, through filtering, drying to water content
For 15wt%；By lignin：Phenol weight ratio is 1:1 addition phenol, 85-95 DEG C of temperature of control, insulation reaction 1 hour,
30wt% sodium hydroxides are finally used to adjust pH to 6.5-7.0 up to phenolate lignin.
The preparation of the oxidized starch：
（1）, select glass apparatus and assemble synthesizer：
JJ600 electronic balances；Digital display thermostat water bath；Digital display constant speed stirrer；Three-necked flask；Electric heating constant temperature forced air drying
Case；NDJ-79 Rotary Viscosimeters.
（2）Reagent chemicals：
Raw material：Tapioca（Moisture 13.8%）；
Reagent：Hydrogen peroxide（30%）, Kocide SD, copper sulphate, sodium hydrogensulfite（It is AR）.
（3）Preparation principle：
Starch is under oxidant effect, and the hydroxyl on glucose unit is oxidable at carboxyl (- COOH), it makes bonding
The stability of agent be improved significantly.Oxidation reduces the quantity of hydroxyl in starch molecule, and molecular association is made to be obstructed, from
And reduce the binding ability of intermolecular hydrogen chain.Meanwhile glucosides chain break, so that macromolecules degradation, starch molecule amount is reduced, from
And increase dissolubility, mobility and caking property.In the presence of liquid caustic soda, with hydroxy combining not oxidized in starch, portion is destroyed
Divide hydrogen bond, make declines between macromolecular, thus be easy swelling gelatinization, assigns its caking property.
Preparation process is as follows：
200g tapiocas are weighed in 1000mL three-necked flasks, water is added to be tuned into the starch milk of 18~21 ° of B é, stirring is equal
It is even, the sodium hydroxide solution of a certain amount of 5%~7% concentration is slowly added dropwise.After water-bath rises to set temperature, 0.01% sulfuric acid is added
Copper.Then a certain amount of hydrogen peroxide is added, after a certain period of time, 0.4g sodium hydrogensulfites are added in isothermal reaction, and stirring 10min is terminated
Reaction.After reaction, it is 5.5~6.0 with dilute hydrochloric acid neutralization reaction liquid pH value.Dehydration is filtered, washes clean is placed in baking oven
It is dried at 40-50 DEG C, crushes, sieves up to product.The above-mentioned oxidized starch used can use the reactor of large capacity to produce.
The production method of above-mentioned moisture-proof composite urea formaldehyde resin：First the clear water of parts by weight is put into reaction kettle, is heated to
80-100 DEG C, magnesia, vinyltriethoxysilane and the propanediol polyoxypropylene polyvinylether of parts by weight is then added,
Stirring 10 minutes to 30 minutes, adds polyvinyl alcohol, the phenolate lignin of parts by weight, is allowed to dissolve, adds parts by weight
Several cyanurotriamide modified urea resins and oxidized starch is kept for 80-90 DEG C and is stirred to react 2-5 hours, is using preceding 10-20 points
Hexa, isocyanuric acid three-glycidyl ester and the anti-blushing agent of parts by weight is added in clock, and being mixed evenly can make
With.
Compared with prior art, the positive effect of the present invention is：
1, unavailable waste material during the present invention is using multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate --- i.e. Eucalyptus
Leftover pieces hot pressing produces particieboard, and since Eucalyptus is a kind of fast growing wood, plate is peeled into after felling, again will with adhesive after dry
Plate is bonded into this multi-layer board and is also referred to as solid wood board, can be used as good office appliance, timber floor, furniture and building-supporting plate
Multiple use, but multiple-plate production process generates largely either in cut-out, rotary-cut or adhesion process, can all generate many
Particle, these multi-layer board factories, particle can only be used as fuel to burn up, cause the great wasting of resources, and the present invention is by corner
Material uses, and is a kind of direction for making full use of resource, saving timber.
2, the particieboard content of formaldehyde produced by the method for the invention is low, has preferable glue performance, while high
Quality stability is good under temperature, high humidity environment, meets water, making moist has been not easy drum, deformation.
3, it is moisture-proof composite urea formaldehyde resin that the key of production method of the present invention, which is adhesive therein, is to use melamine
Modified urea-formaldehyde resin has the advantages that simple for process, raw material is cheap, and adhesive strength is high, water white transparency as adhesive major ingredient, and
And low formaldehyde gas release, it is a kind of environmental type resin, the water resistance of Lauxite can be improved, and prevents glue-line contraction from subtracting
Few internal stress, improves ageing-resistant performance, increases glue solid content, viscosity and tack, extends working life.And it is anti-to use magnesia
Oxidant so that the particieboard produced is not allowed perishable, extends the service life, anti-aging can also increase viscosity；Using poly- second
Enol is toughener so that the wood-based plate intensity produced increases；Using propanediol polyoxypropylene polyvinylether, for defoaming
Agent prevents having the generation of bubble cavity during adhesive use；Using hexa and isocyanuric acid three-glycidyl ester
For curing agent；Select vinyltriethoxysilane as bridging agent, one end can be combined with Lauxite carbonyl, other end energy
With the hydroxy combining of starch, enhance its plank intensity；Contain a large amount of active groups in phenolate lignin, as formaldehyde catching agent,
Part free formaldehyde can be eliminated；Cyanurotriamide modified urea resin can be reduced as sticky complexing agent using oxidized starch
Addition saves cost；Using paraffin wax emulsions as anti-blushing agent, since paraffin wax emulsions granularity is small, in artificial board manufacturing process
In, by being effectively demulsified, small Wax particles can be made to be precipitated from water phase, be equably adsorbed on wood-fibred, and paraffin
Lotion has the characteristics that reduce the depth of moisture absorption of expansion ratio of particieboard.The composite urea formaldehyde resin has residual formaldehyde amount low, water-fast,
The good advantage of moisture resistance, residual formaldehyde amount is low to making in the particieboard that production obtains, and is not easy to expand after water suction, it is not easy to encircle
Deformation is played, wearing layer is not readily susceptible to destroy.And in process of production, by strictly controlling the technique in production process
Parameter ensures the quality of the particieboard of production.
Specific implementation mode
Embodiment 1
The method for producing particieboard using moisture-proof composite urea formaldehyde resin, preparation process include the following steps：
1）By unavailable waste material during multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate with transport after simple screening
Machine, which is sent in chipper, carries out wood shavings, then is sent to progress transition storage in wet wood shavings feed bin through transporter；The water content of wet wood shavings
Percent by weight should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings 10%
Below；
3）By the wood shavings after drying with isolating wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is in 2 centimetres of dry wood shavings of watch core layer below through transporter
It is sent to the dry wood shavings material transitional storehouse storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings of watch core layer after smashing again
Expect transitional storehouse storage；
5）The qualified dry wood shavings of watch core layer are transported through transporter, are sent in glue mixer after the metering of chip metering feed bin, simultaneously
Adjust glue mixing workshop section that the moisture-proof composite urea formaldehyde resin adhesive required by technique is sent in glue mixer, wood shavings and moisture-proof compound ureaformaldehyde
Resin adhesive achievees the effect that uniformly mixing is fully glued, wood shavings particle accounts for plate under being sufficiently stirred of watch core layer glue mixer
The 85-90% of material dry weight, moisture-proof composite urea formaldehyde resin adhesive and additive account for 10-15%；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation by mechanical classification unit of mating formation
The particle mat of uniform ground determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.8MPa, time 8min；Hot pressing is finally carried out, heat
Pressure pressure 2.5MPa, temperature be 210 DEG C, hot pressing time be every millimeter of plate thickness 80s~85s, then send to balance library in it is quenched,
Particieboard is made.
Step 5）The additive is titanium dioxide.
Step 5）The moisture-proof composite urea formaldehyde resin adhesive, is made of the raw material of following parts by weight：
50 parts of cyanurotriamide modified urea resin；
20 parts of oxidized starch；
1 part of polyvinyl alcohol；
3 parts of magnesia；
2 parts of propanediol polyoxypropylene polyvinylether；
2 parts of hexa；
1 part of isocyanuric acid three-glycidyl ester；
0.5 part of vinyltriethoxysilane；
5 parts of phenolate lignin；
100 parts of clear water；
2 parts of anti-blushing agent.
The anti-blushing agent is paraffin wax emulsions, and using the product of Ren Xin plastic molding and processing plants of Wenan County production, Corporation web site is：
http://show.guidechem.com/renxin/pro-show5725830.html。
Cyanurotriamide modified urea resin of the present invention is using the cyanurotriamide modified urea resin bought in the market.
The production method of moisture-proof composite urea formaldehyde resin：First the clear water of parts by weight is put into reaction kettle, is heated to 80 DEG C,
Then magnesia, vinyltriethoxysilane and the propanediol polyoxypropylene polyvinylether of parts by weight is added, stirs 10 points
Clock adds polyvinyl alcohol, the phenolate lignin of parts by weight, is allowed to dissolve, adds the cyanurotriamide modified of parts by weight
Lauxite and oxidized starch are kept for 80 DEG C and are stirred to react 2 hours, in six Asias using first 10-20 minutes addition parts by weight
Tetramine, isocyanuric acid three-glycidyl ester and anti-blushing agent are mixed evenly and can be used.
Embodiment 2
The method for producing particieboard using moisture-proof composite urea formaldehyde resin, preparation process include the following steps：
1）By unavailable waste material during multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate with transport after simple screening
Machine, which is sent in chipper, carries out wood shavings, then is sent to progress transition storage in wet wood shavings feed bin through transporter；The water content of wet wood shavings
Percent by weight should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings 10%
Below；
3）By the wood shavings after drying with isolating wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is in 2 centimetres of dry wood shavings of watch core layer below through transporter
It is sent to the dry wood shavings material transitional storehouse storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings of watch core layer after smashing again
Expect transitional storehouse storage；
5）The qualified dry wood shavings of watch core layer are transported through transporter, are sent in glue mixer after the metering of chip metering feed bin, simultaneously
Adjust glue mixing workshop section that the moisture-proof composite urea formaldehyde resin adhesive required by technique is sent in glue mixer, wood shavings and moisture-proof compound ureaformaldehyde
Resin adhesive achievees the effect that uniformly mixing is fully glued, wood shavings particle accounts for plate under being sufficiently stirred of watch core layer glue mixer
The 85-90% of material dry weight, moisture-proof composite urea formaldehyde resin adhesive and additive account for 10-15%；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation by mechanical classification unit of mating formation
The particle mat of uniform ground determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.8MPa, time 8min；Finally carry out hot pressing, hot pressing
Pressure 2.8MPa, temperature are 205 DEG C, and hot pressing time is every millimeter of plate thickness 80s~85s, then send, system quenched into balance library
Obtain particieboard.
Step 5）The additive is talcum powder.
Step 5）The moisture-proof composite urea formaldehyde resin adhesive, is made of the raw material of following parts by weight：
70 parts of cyanurotriamide modified urea resin；
24 parts of oxidized starch；
2 parts of polyvinyl alcohol；
5 parts of magnesia；
2.4 parts of propanediol polyoxypropylene polyvinylether；
2.4 parts of hexa；
1.4 parts of isocyanuric acid three-glycidyl ester；
2 parts of vinyltriethoxysilane；
8 parts of phenolate lignin；
140 parts of clear water；
3 parts of anti-blushing agent.
The anti-blushing agent is paraffin wax emulsions, and using the product of Ren Xin plastic molding and processing plants of Wenan County production, Corporation web site is：
http://show.guidechem.com/renxin/pro-show5725830.html。
Cyanurotriamide modified urea resin of the present invention is using the cyanurotriamide modified urea resin bought in the market.
The production method of moisture-proof composite urea formaldehyde resin：First the clear water of parts by weight is put into reaction kettle, is heated to 85 DEG C,
Then magnesia, vinyltriethoxysilane and the propanediol polyoxypropylene polyvinylether of parts by weight is added, stirs 20 points
Clock adds polyvinyl alcohol, the phenolate lignin of parts by weight, is allowed to dissolve, adds the cyanurotriamide modified of parts by weight
Lauxite and oxidized starch are kept for 85 DEG C and are stirred to react 3.5 hours, are using the six of first 10-20 minutes addition parts by weight
Methenamine, isocyanuric acid three-glycidyl ester and anti-blushing agent are mixed evenly and can be used.
Embodiment 3
The method for producing particieboard using moisture-proof composite urea formaldehyde resin, preparation process include the following steps：
1）By unavailable waste material during multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate with transport after simple screening
Machine, which is sent in chipper, carries out wood shavings, then is sent to progress transition storage in wet wood shavings feed bin through transporter；The water content of wet wood shavings
Percent by weight should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings 10%
Below；
3）By the wood shavings after drying with isolating wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is in 2 centimetres of dry wood shavings of watch core layer below through transporter
It is sent to the dry wood shavings material transitional storehouse storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings of watch core layer after smashing again
Expect transitional storehouse storage；
5）The qualified dry wood shavings of watch core layer are transported through transporter, are sent in glue mixer after the metering of chip metering feed bin, simultaneously
Adjust glue mixing workshop section that the moisture-proof composite urea formaldehyde resin adhesive required by technique is sent in glue mixer, wood shavings and moisture-proof compound ureaformaldehyde
Resin adhesive achievees the effect that uniformly mixing is fully glued, wood shavings particle accounts for plate under being sufficiently stirred of watch core layer glue mixer
The 85-90% of material dry weight, moisture-proof composite urea formaldehyde resin adhesive and additive account for 10-15%；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation by mechanical classification unit of mating formation
The particle mat of uniform ground determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.9MPa, time 5min；Hot pressing is finally carried out, heat
Pressure pressure 3MPa, temperature are 200 DEG C, and hot pressing time is every millimeter of plate thickness 80s~85s, then send, system quenched into balance library
Obtain particieboard.
Step 5）The additive is white carbon.
Step 5）The moisture-proof composite urea formaldehyde resin adhesive, is made of the raw material of following parts by weight：
100 parts of cyanurotriamide modified urea resin；
30 parts of oxidized starch；
3 parts of polyvinyl alcohol；
8 parts of magnesia；
3 parts of propanediol polyoxypropylene polyvinylether；
3 parts of hexa；
2 parts of isocyanuric acid three-glycidyl ester；
5 parts of vinyltriethoxysilane；
10 parts of phenolate lignin；
200 parts of clear water；
5 parts of anti-blushing agent.
The anti-blushing agent is paraffin wax emulsions, and using the product of Ren Xin plastic molding and processing plants of Wenan County production, Corporation web site is：
http://show.guidechem.com/renxin/pro-show5725830.html。
Cyanurotriamide modified urea resin of the present invention is using the cyanurotriamide modified urea resin bought in the market.
The production method of above-mentioned moisture-proof composite urea formaldehyde resin：First the clear water of parts by weight is put into reaction kettle, is heated to
100 DEG C, magnesia, vinyltriethoxysilane and the propanediol polyoxypropylene polyvinylether of parts by weight is then added, stirs
It mixes 30 minutes, adds polyvinyl alcohol, the phenolate lignin of parts by weight, be allowed to dissolve, add the melamine of parts by weight
Amine modified urea-formaldehyde resin and oxidized starch are kept for 90 DEG C and are stirred to react 5 hours, are using first 10-20 minutes addition parts by weight
Hexa, isocyanuric acid three-glycidyl ester and anti-blushing agent, be mixed evenly i.e. can be used.
Comparative example 1
The method for producing particieboard using composite urea formaldehyde resin, preparation process include the following steps：
1）By unavailable waste material during multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate with transport after simple screening
Machine, which is sent in chipper, carries out wood shavings, then is sent to progress transition storage in wet wood shavings feed bin through transporter；The water content of wet wood shavings
Percent by weight should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings 10%
Below；
3）By the wood shavings after drying with isolating wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is in 2 centimetres of dry wood shavings of watch core layer below through transporter
It is sent to the dry wood shavings feed bin transition storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings material in surface layer after smashing again
Storehouse transition storage；
5）The qualified dry wood shavings of watch core layer are sent to after transporter, chip metering feed bin measure respectively in glue mixer, simultaneously
Adjust glue mixing workshop section by the adhesive required by technique（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）It send
Into glue mixer, wood shavings and adhesive（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）In watch core layer
Under being sufficiently stirred of glue mixer, achieve the effect that uniformly mixing is fully glued, wood shavings particle accounts for the 85-90% of plank dry weight, gluing
Agent（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）10-15% is accounted for additive；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation by mechanical classification unit of mating formation
The particle mat of uniform ground determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.8MPa, time 8min；Hot pressing is finally carried out, heat
Pressure pressure 2.5MPa, temperature be 210 DEG C, hot pressing time be every millimeter of plate thickness 80s~85s, then send to balance library in it is quenched,
Particieboard is made.
Step 5）The additive is titanium dioxide.
Comparative example 2
The method for producing particieboard using composite urea formaldehyde resin, preparation process include the following steps：
1）By unavailable waste material during multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate with transport after simple screening
Machine, which is sent in chipper, carries out wood shavings, then is sent to progress transition storage in wet wood shavings feed bin through transporter；The water content of wet wood shavings
Percent by weight should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings 10%
Below；
3）By the wood shavings after drying with isolating wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is in 2 centimetres of dry wood shavings of watch core layer below through transporter
It is sent to the dry wood shavings material transitional storehouse storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings of watch core layer after smashing again
Expect transitional storehouse storage；
5）The qualified dry wood shavings of watch core layer are transported through transporter, are sent in glue mixer after the metering of chip metering feed bin, simultaneously
Adjust glue mixing workshop section by the adhesive required by technique（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）It send
Into glue mixer, wood shavings and adhesive（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）In watch core layer
Under being sufficiently stirred of glue mixer, achieve the effect that uniformly mixing is fully glued, wood shavings particle accounts for the 85-90% of plank dry weight, gluing
Agent（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）10-15% is accounted for additive；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation by mechanical classification unit of mating formation
The particle mat of uniform ground determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.8MPa, time 8min；Finally carry out hot pressing, hot pressing
Pressure 2.8MPa, temperature are 205 DEG C, and hot pressing time is every millimeter of plate thickness 80s~85s, then send, system quenched into balance library
Obtain particieboard.
Step 5）The additive is talcum powder.
Comparative example 3
The method for producing particieboard using composite urea formaldehyde resin, preparation process include the following steps：
1）By unavailable waste material during multilayer Eucalyptus plate processed after rotary-cut Eucalyptus plate with transport after simple screening
Machine, which is sent in chipper, carries out wood shavings, then is sent to progress transition storage in wet wood shavings feed bin through transporter；The water content of wet wood shavings
Percent by weight should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings 10%
Below；
3）By the wood shavings after drying with isolating wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is in 2 centimetres of dry wood shavings of watch core layer below through transporter
It is sent to the dry wood shavings material transitional storehouse storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings of watch core layer after smashing again
Expect transitional storehouse storage；
5）The qualified dry wood shavings of watch core layer are transported through transporter, are sent in glue mixer after the metering of chip metering feed bin, simultaneously
Adjust glue mixing workshop section by the adhesive required by technique（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）It send
Into glue mixer, wood shavings and adhesive（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）In watch core layer
Under being sufficiently stirred of glue mixer, achieve the effect that uniformly mixing is fully glued, wood shavings particle accounts for the 85-90% of plank dry weight, gluing
Agent（For urea-formaldehyde resin adhesive, it is purchased from Zibo Hua Sen adhesives Co., Ltd）10-15% is accounted for additive；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation by mechanical classification unit of mating formation
The particle mat of uniform ground determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.9MPa, time 5min；Hot pressing is finally carried out, heat
Pressure pressure 3MPa, temperature are 200 DEG C, and hot pressing time is every millimeter of plate thickness 80s~85s, then send, system quenched into balance library
Obtain particieboard.
Step 5）The additive is white carbon.
According to GB/T15036.2-2001《Solid wooden floor board plate is examined and test method》To the first of products obtained therefrom in embodiment
Aldehyde burst size, bonding strength and expansion rate of water absorption are measured；The measurement for playing drum phenomenon of wood-based plate uses water-boiling method, i.e. handle
It is 80cm that wood-based plate, which is cut out,（It is long）×30cm（It is wide）Specification, first boiled in 100 DEG C of water 3 hours, it is indeformable, do not crack,
It is dried again at 60-70 DEG C, record wood-based plate plays the drum time used, and the time is longer, illustrates that the quality of wood-based plate is better, normal condition
Under use, it is more difficult to drum.It is 80cm that wood-based plate, which is cut out,（It is long）×30cm（It is wide）Specification, be put into the low-temperature test of 25 DEG C of constant temperature
1h is placed in room, gives low-temperature test room to cool down later, near -10 DEG C in 2 minutes, keeps -10 DEG C of 30min, low temperature is surveyed later
Examination room, which is brought rapidly up, checks whether the cracking situation and wood-based plate of wood-based plate layer and interlayer deform to 25 DEG C, according to cracking
Deformation obtains the anti-freezing property of wood-based plate.Three times, data are averaged each product testing, every testing result such as following table
It is shown：
Find out from upper table, moisture-proof composite urea formaldehyde resin of the invention produces particieboard relative to common urea-formaldehyde resin adhesive
Particieboard prepared by glutinous agent has the advantages that protrusion, is mainly manifested in：The present invention have preferable glue performance, while high temperature,
Quality stability is good under high humidity environment, meets water, making moist has been not easy drum, deformation.
Claims (2)
1. using the method for moisture-proof composite urea formaldehyde resin production particieboard, which is characterized in that include the following steps：
1）Unavailable waste material during rotary-cut Eucalyptus plate multilayer Eucalyptus plate is sent to after simple screening with transporter
Wood shavings are carried out in chipper, then are sent to progress transition storage in wet wood shavings feed bin through transporter；The water content percentage weight of wet wood shavings
Amount should be maintained at 20% or less；
2）Wet wood shavings, which are sent to through transporter in roller drier, to be dried, and makes the water content percent by weight of wood shavings below 10%；
3）Wood shavings after drying are isolated into wood skin；Detach metal and sandstone；
4）By dry wood shavings by screening and sorting, length is sent in 2 centimetres of dry wood shavings of watch core layer below through transporter
Toward the dry wood shavings material transitional storehouse storage of watch core layer, the wood shavings more than 2 centimetres are sent to the dry wood shavings material mistake of watch core layer after smashing again
Storage is crossed to deposit；
5）The qualified dry wood shavings of watch core layer are transported through transporter, are sent in glue mixer after the metering of chip metering feed bin, while adjusting and mixing
Moisture-proof composite urea formaldehyde resin adhesive required by technique is sent in glue mixer by glue workshop section, wood shavings and moisture-proof composite urea formaldehyde resin
Adhesive achievees the effect that uniformly mixing is fully glued, it is dry that wood shavings particle accounts for plank under being sufficiently stirred of watch core layer glue mixer
The 85-90% of weight, moisture-proof composite urea formaldehyde resin adhesive and additive account for 10-15%；
The step 5）Additive be any one of titanium dioxide, talcum powder and white carbon；
The moisture-proof composite urea formaldehyde resin adhesive, is made of the raw material of following parts by weight：Melamine modified urea-formaldehyde tree
50~100 parts of fat, 20~30 parts of oxidized starch, 1~3 part of polyvinyl alcohol, 3~8 parts of magnesia, propanediol polyoxypropylene polyethylene
2~3 parts of ether, 2~3 parts of hexa, 1~2 part of isocyanuric acid three-glycidyl ester, vinyltriethoxysilane 0.5
~5 parts, 5~10 parts of phenolate lignin, 100~200 parts of clear water, 2~5 parts of anti-blushing agent；
The anti-blushing agent is paraffin wax emulsions；
6）Wood shavings after sizing are sent through belt conveyer to mechanical classification spreading machine, mat formation uniformly by mechanical classification unit of mating formation
Smooth particle mat determines particle mat size specification according to hot press size；
7）Particle mat is subjected to precompressed, the pressure of precompressed is 0.8~0.9MPa, 5~8min of time；Finally carry out heat
Pressure, 2.5~3MPa of hot pressing pressure, temperature be 200~210 DEG C, hot pressing time be every millimeter of plate thickness 80s~85s, then send to
Balance quenched in library, obtained particieboard.
2. the method according to claim 1 for producing particieboard using moisture-proof composite urea formaldehyde resin, it is characterised in that：It is described
Moisture-proof composite urea formaldehyde resin production method：First the clear water of parts by weight is put into reaction kettle, is heated to 80-100 DEG C, so
Magnesia, vinyltriethoxysilane and the propanediol polyoxypropylene polyvinylether of parts by weight are added afterwards, stirs 10 minutes
To 30 minutes, polyvinyl alcohol, the phenolate lignin of parts by weight are added, is allowed to dissolve, adds the melamine of parts by weight
Amine modified urea-formaldehyde resin and oxidized starch are kept for 80-90 DEG C and are stirred to react 2-5 hours, are using first 10-20 minutes addition weight
Hexa, isocyanuric acid three-glycidyl ester and the anti-blushing agent of number are mixed evenly and can be used.
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| CN112776097A (en) * | 2021-01-05 | 2021-05-11 | 山东拜尔新材料有限公司 | Automatic production process method of artificial board |
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| CN104772795A (en) * | 2015-03-30 | 2015-07-15 | 广西宾阳县荣良新材料科技有限公司 | Sandwich board and production method thereof |
| CN105751345A (en) * | 2016-03-18 | 2016-07-13 | 广西横县新威林板业有限公司 | Method for producing oriented strand board by using eucalyptus waste single board |
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