CN109366667A - A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet - Google Patents

A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet Download PDF

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Publication number
CN109366667A
CN109366667A CN201811320370.8A CN201811320370A CN109366667A CN 109366667 A CN109366667 A CN 109366667A CN 201811320370 A CN201811320370 A CN 201811320370A CN 109366667 A CN109366667 A CN 109366667A
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parts
urea
added
medium density
formaldehyde
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郑涛
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Guangxi Hengxian Liguan Wood-Based Panel Co Ltd
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Guangxi Hengxian Liguan Wood-Based Panel Co Ltd
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Priority to CN201811320370.8A priority Critical patent/CN109366667A/en
Publication of CN109366667A publication Critical patent/CN109366667A/en
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    • 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
    • B27L11/08Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood fibres, e.g. produced by tearing
    • 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
    • B27N3/10Moulding of mats
    • B27N3/12Moulding of mats from fibres
    • 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
    • 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
    • B27N7/00After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00Fibrous raw materials or their mechanical treatment
    • D21B1/02Pretreatment of the raw materials by chemical or physical means
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00Fibrous raw materials or their mechanical treatment
    • D21B1/04Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/063Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses a kind of production methods of Fireproof fire retardation type medium density fiber Special board for cabinet, it the steps include: (1) pretreatment of raw material, (2) screening, (3) boiling softening, (4) it grinds, (5) it is glued, is dry, (6) precompressed, (7) hot pressing, (8) saw sanction, sanding, (9) veneer hot pressing, (10) edge sealing is to get finished product.The present invention is primary raw material using discarded leftover pieces remained by eucalyptus bark, branch and manufacture plate, adds other weedtrees, turns waste into wealth, it can be achieved that making effective use of to timber resources;Modified paraffin and flame-retarded urea-formaldehyde Resin adhesive are added, it is safe and environment-friendly Special board for cabinet that so that its fire retardant performance greatly promotes, medium density fiber Special board for cabinet obtained, fire retardant performance is good, and water-tolerant, content of formaldehyde is low.

Description

A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet
Technical field
The invention belongs to cupboard board technical field, the life of specifically a kind of Fireproof fire retardation type medium density fiber Special board for cabinet Production method.
Background technique
Wood-based plate is centainly to be machined using timber or other non-wood plants as raw material and be separated into various unit materials Afterwards, apply or do not apply adhesive and other additives it is glued made of plate or molded article.It mainly include glued board, wood shavings The three categories product such as (particle) plate and fiberboard, extension product and deep processed product reach hundreds of.Glued board is softened by boiling Log, be peeled into thin slice greatly, then be mutually perpendicular to place by each direction of wooden fibers, with the synthetic resin gum of water-tolerant Plate made of bonding, then pressurized, dry, saw side, surfacing.Its number of plies claims respectively at odd number, generally 3~13 layers Three-ply board, five-ply board etc..There are linden, birch, Manchurian ash, beech, color wood, willow Eucalyptus etc. for making the tree species of glued board.Plane Card is using applying or do not apply the wood wool of sizing material or plate that wood-fibred material is pressed into, and particieboard density is small, material is equal It is even but easy to moisture absorption, intensity is low.Fiberboard is to be crushed the waste materials such as bark, wood shavings, branch, impregnate, being ground into wood pulp, then passing through Extrusion forming is dried and manufactured plate.Depending on its density, it is divided into high-density plate, medium-density plate and low-density plank. Many wood wastes, such as treetop, branch and slab can be generated in production plywood process, traditional timber factory is all by these Waste material regards boiler oil, causes very big waste.With the fast development of building decoration and upholstery, domestic timber demand Sharp increase is measured, the notch of wood supply is more and more prominent, and increasing to the utilization scope of fiberboard is timber resources comprehensive utilization Effective way, be conducive to alleviate China's timber imbalance between supply and demand.
Cupboard board is a huge market in Decoration Industry, and almost every household can all be used.For producing cupboard board Plate be mainly wood-based plate and all kinds of solid wood boards, wherein wood-based plate is mainly density board and particieboard.Currently on the market The door-plate of cabinet point can be divided into following several materials from material: solid wood, plastic uptake, double facings, baking vanish, uv paint, classic dumb light paint, Acrylic, melamine plate etc..Disadvantage in existing cupboard board mainly has that easy to crack, easy to aging, service life is short, content of formaldehyde More, humidity resistance is not good etc. enough, and the cupboard board of some high-quality is often expensive, promotes and applies very limited.Such as: gold It is expensive to belong to plate, color is given people a kind of ice-cold feeling, lacked family's warmth sense, and be easily deformed, slightly based on cool tone It is easy for leaving the hole point of groove-like after micro- collision, scratches more difficult reparation.Price is higher on the market for melamine decorative door-plate, Fake products is also very much.The cold and hot coefficient of expansion of acrylic cabinet door plate is very big, because temperature change is considered as reserved flexible gap.It is real Plank selects natural material, and scarcity of resources price is higher, and color is also to be determined by tree species, and alternative is few, excessively dry and tide Wet environment is also unsuitable for solid wood, thus maintenance get up it is more troublesome, resistance to acid and alkali is poor;Domestic cabinet technological level at present Still there is gap with the world, domestic solid wood door plate technique is not in place, the problems such as deformation, dry and cracked, surface crude easily occurs.
Therefore, the present invention develops a kind of with fire prevention or flame retarding function, while content of formaldehyde is low, lower-cost cabinet is special With plate, there is good development prospect, while being also can be to the effective way that waste wood is comprehensively utilized.
Summary of the invention
The object of the present invention is to provide a kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet, this method It is primary raw material using discarded leftover pieces remained by eucalyptus bark, branch and manufacture plate, adds other weedtrees, become Waste be changed into values, it can be achieved that making effective use of to timber resources;Modified paraffin and flame-retarded urea-formaldehyde Resin adhesive are added, so that its Fire retardant performance greatly promotes, and medium density fiber Special board for cabinet obtained, fire retardant performance is good, water-tolerant, formaldehyde Content is low, safe and environment-friendly.
The invention is realized by the following technical scheme:
A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet, specific steps are as follows:
(1) pretreatment of raw material: Eucalyptus leftover pieces are uniformly mixed with other weedtrees according to weight ratio 1:0.3~0.5, growth is cut Spend the fragment of 3~5cm, 0.5~1cm of width;
The Eucalyptus leftover pieces include eucalyptus bark, branch and manufacture plate remained by discarded leftover pieces;Described is miscellaneous Wood includes pine, linden, birch, Manchurian ash, willow Eucalyptus etc.;Timber (is counted using preceding first hang 15~20 days after felling When), and mouldy, generation blackspot is avoided, the wood waste by stacking easily crushes, and fragment pick-up rate is high.
(2) it sieves: wood shavings obtained above is sieved, remove silt and partial size is less than the powder of 0.2cm, and Iron is removed by strong magnetic inspiration row;
(3) boiling softens: wood shavings is transported in cooker, suitable quantity of water is added to impregnate 15~30min, it is then logical to cooker Enter steam, holding pressure inside the tank is 0.15~0.18Mpa, 2~4min of boiling, obtained after boiling water content be 75~85% it is soft Wood chip;
Boiling wood shavings needs the good boiling degree of strict control, and wood shavings boiling degree is inadequate, then in defibrination, energy consumption is high, mill Machine is easy to damage, and digestion time is too long, then fiber color is deep, influences the quality of production board.
(4) grind: the cork sheet that boiling is obtained is transported to refiner and grinds, and 2000~3000r/min of revolving speed is ground 5~8min is ground, its fiber separation is made;
(5) it is glued, is dry: the fiber of milled being passed through in drying duct, is uniformly sprayed into from pipeline upper and lower ends with Sprayable Modified paraffin lotion lotion and flame-retarded urea-formaldehyde Resin adhesive, are passed through hot wind and are dried, pipeline intake air temperature be 160~ 165 DEG C, discharge port temperature be 65~75 DEG C, finally pass through cyclone separator or venturi separator, obtain moisture content be 8~ 10% fiber delivers into feed bin storage;Exhaust steam is used to heat the water in cooker through over-heat-exchanger;
Exhaust steam is used to heat the water in cooker through over-heat-exchanger;Dried fiber moisture needs strict control, aqueous Rate is low, and the slab after precompressed is easy to crack in cutting edge, truncation, and moisture content Gao Ze is explosive in precompressed slab.
(6) precompressed: fiber is mated formation into continuous fluffy slab band through spreading machine, and is put down by scraping plain-barreled roll, extra fibre Dimension sends feed bin back to by blast system;After gauge check, qualified fluffy slab band enter continuous strip formula preformer into Row precompressed, preload pressure are 0.4~0.6Mpa, 20~30min of squeeze time;
(7) hot pressing: the slab after precompressed is sent into hot press after cutting edge, truncation and carries out hot pressing, and hot pressing temperature is 240~255 DEG C, 100~130s is suppressed under the conditions of 0.8~1.0Mpa, and 20~60s is suppressed under the conditions of 0.5~0.7Mpa, obtains hot pressing Plate;
(8) saw sanction, sanding: heating platen passes through 3~8min of cold front heavy rain, places 48~72h at room temperature, and saw is cut into fixed specification, Two sides sanding is to get medium density fibre board (MDF);
Medium density fiber 3.5~the 7.0cm of plate thickness, 0.5~0.7g/cm of density3, moisture content is no more than 10%;
(9) veneer hot pressing: 1~3 piece of medium density fibre board (MDF) smooth, in homogeneous thickness of selection, as substrate layer, with moisture-proof ureaformaldehyde tree Rouge adhesive carries out assembly;One layer of decorative layer is sticked on surface, puts aluminum oxide wear layer again in decorative layer, into hot press into Row hot pressing, hot pressing pressure are 1.0~1.5MPa, and hot pressing temperature is 120~130 DEG C, and hot pressing time is 2~4min;
(10) edge sealing: surrounding is with aluminium alloy fringing to get ground Special board for cabinet after cooling.
The straying quatity of modified paraffin lotion and flame-retarded urea-formaldehyde Resin adhesive described in step (5) are as follows: every cubic metre of timber Fragment applies 5~10kg modified paraffin lotion and 155~190kg flame-retarded urea-formaldehyde Resin adhesive.
The modified paraffin is prepared from the following raw materials in parts by weight: 60~80 parts of paraffin, 10~20 parts of chlorinated paraffin, 15~25 parts of polyethylene, 5~10 parts of polysorbas20,5~10 parts of turpentine oil, 8~12 parts of calcium stearate, sodium carboxymethylcellulose 2~ 5 parts;The modified paraffin lotion the preparation method comprises the following steps: by heating paraffin to 50~60 DEG C, emulsifying wax is added and stirs evenly, adds Enter polyethylene, polysorbas20, turpentine oil, calcium stearate and sodium carboxymethylcellulose, 1~3h is reacted under the conditions of 85~95 DEG C, it is cold But, modified paraffin can be obtained.Modified paraffin prepared by the present invention belongs to macromolecule reaction type water repellent agent, can be by quiet Electric attraction and macromolecule winding effect and fiber carry out efficiently firm combine and achieve the purpose that be glued waterproof, are the height of low cost Imitate waterproofing agent.
The flame-retarded urea-formaldehyde Resin adhesive is prepared from the following raw materials in parts by weight: 25~35 parts of paraformaldehyde, first 40~50 parts of aldehyde, 150~200 parts of urea, 10~20 parts of furfural, 5~10 parts of modified montmorillonoid, 5~10 parts of hydrogenated rosin, phenolic aldehyde 5~10 parts of resin, 5~10 parts of talcum powder, 3~6 parts of formaldehyde catching agent, 2~5 parts of fire retardant, anilinomethyl triethoxysilane 0.5~2 part.
The formaldehyde catching agent is polyvinyl alcohol, dimethylol urea and acrylamide ratio 5:2:3 by weight mixing system At;The fire retardant is nanmeter antimong trioxide, brominated Polystyrene, borax ratio 1:1:2 by weight are mixed.
The modified montmorillonoid the preparation method comprises the following steps: (1) by montmorillonite dissolve in water carry out ultrasound, be added montmorillonite it is total The sodium pyrophosphate of weight 2~4%, stirs evenly, and the hydrochloric acid regulation system pH4 that addition mass fraction is 0.1~0.2 mol/L~ 7;Then solution is settled, is centrifuged, washed, drying obtains purifying montmorillonite;(2) purifying montmorillonite is dissolved in water, is added and covers The silane coupling agent KH560 of de- soil total weight 3~5%, is heated to 80~90 DEG C, reacts 1~2h, products therefrom is filtered, Washing, is sieved to get modified montmorillonoid at drying.
The preparation method of the flame-retarded urea-formaldehyde Resin adhesive, urea are added in four times, and furfural is added in two portions, specifically Steps are as follows:
(1) formaldehyde is added in reactor, is warming up to 50~60 DEG C, add total weight 50~60% urea, 70~80% Modified montmorillonoid is added in furfural, with NaOH solution tune pH to 7.8~8.5, is to slowly warm up to 80~85 DEG C, and reaction 40~ 50min;
(2) with formic acid tune pH to 5.5~6.0, the urea and hydrogenated rosin of total weight 20~30% is added, 80~85 DEG C of holding anti- Answer 20~30min;
(3) with NaOH solution tune pH to 7.5~8.0, paraformaldehyde is added, then adds up the urea of weight 10~15% and remaining Furfural is stirring evenly and then adding into fire retardant and titanate coupling agent, keeps 88~92 DEG C of 30~40min of reaction;
(4) with formic acid tune pH to 5.5~6.0, remaining urea is added, reacts 30~40min, adjusts pH to 7.0~7.4, it is cooling To 35 DEG C or less blowings, modified urea-formaldehyde resin is obtained;
(5) pH to 7.0~7.4 is adjusted, phenolic resin, talcum powder and formaldehyde catching agent are added while stirring, 85~88 DEG C of holding anti- 50~70min is answered, room temperature is cooled to, obtains flame-retarded urea-formaldehyde Resin adhesive.
Each raw material used in modified paraffin and urea-formaldehyde resin adhesive of the present invention is described below:
Paraffin is taken off from the resulting lube cut of crude distillation through solvent refining, solvent dewaxing or through wax freezing and crystallizing, squeezing It is waxed to obtain slack wax, then through de-oiling, and sheet made from post-refining or acicular crystal.Chlorinated paraffin (chlorination approximately) be paraffin hydrocarbon chlorinated derivatives, have many advantages, such as that low volatility, fire-retardant, electrical insulating property is good, inexpensive, With the plasticising of promotion paraffin, fire-retardant, waterproof function and effect.
Polyethylene (polyethylene, abbreviation PE) is a kind of aggregated thermoplastic resin obtained of ethylene, odorless, nothing Poison, feel ceraceous have excellent resistance to low temperature, and chemical stability is good, are resistant to the erosion of most of soda acids, insoluble under room temperature In common solvent, water imbibition is small, and electrical insulating property is excellent.Polyethylene is a kind of resinae modifying agent, helps to enhance paraffin crystal Stability, improve the hardness and brightness of paraffin, improve its leakproofness.
Polysorbas20 (TWEEN-20), Chinese name: polyoxyethylene (20) sorbitanmonolaureate, is sorbierite and one Dehydration, double dehydration compounds and laurate exist by every mole of sorbierite and its anhydro compounds and about 20 moles of ethylene oxide It is condensed and is made under alkaline condition.Have the effects that emulsification, diffusion, solubilising, stabilization, be used as emulsifier, dispersing agent, solubilizer, Stabilizer.
Turpentine oil (Pinus massoniana Lamb) be Pinaceae Pinus (Pinus) oleoresin that oozes out in several plants, The volatile oil for being distilled or being extracted., it is added in paraffin as emulsifier and modifying agent, the low temperature resistant of paraffin can be improved Performance, the erosion of resistance to benzene, fat, grease etc., moreover it is possible to improve the toughness and plasticity of paraffin.
Paraformaldehyde (Paraformaldehyde;Polyoxymethylene), alias: poly- formaldehyde, polymerization formaldehyde, secondary first Aldehyde, solid formaldehyde polymerize formaldehyde, and white amorphous powder is the line polymer of formaldehyde, have formaldehyde odor, molecular formula: HO-(CH2O)n-H,n=10-100.Paraformaldehyde is soluble in hot water and releases formaldehyde, slow to be dissolved in cold water, can be dissolved in caustic alkali and Alkali metal carbonate solution, does not dissolve in pure and mild ether, and high polymer is not soluble in water.Low polymerization degree paraformaldehyde replaces unskilled labor Industry formalin, in synthetic pesticide, synthetic resin, coating and the diversified formaldehyde downstream product such as produce fumigant In, the energy consumption of dehydration can be not only reduced, but also wastewater treatment capacity can be greatly reduced, can be used as disinfectant, fungicide, insecticide.
Furfural (2-Furaldehyde), scientific name is furaldehyde, also known as 2 furan carboxyaldehyde, is same object with alditol Matter is the derivative that the hydrogen atom on 2, furans is replaced by aldehyde radical.Furfural is to hydrolyze generation under the action of an acid by pentosan Pentose, then be cyclized by dehydration of pentoses.Furfural has aldehyde radical, dialkylene ether functional group, therefore furfural has aldehyde, ether, diene The property of the compounds such as hydrocarbon, is added furfural in Lauxite, introduces hydrophobic bond by cocondensation, can there is effective improvement The water resistance of Lauxite.
Montmorillonite (montmorillonite) also known as montmorillonite, montmorillonite, a kind of natural minerals of silicate be The essential mineral component of bentonite ore.Montmorillonite is phyllosilicate, is that raw material sources are the abundantest, cheap and easy to get so far Nanofiller.
The present invention prepares urea-formaldehyde resin adhesive as additive using modified montmorillonite, since montmorillonite has very greatly Surface area, there is good suction-operated, can be with the free formaldehyde in Lauxite ining conjunction with, and then reduction free formaldehyde Content;Montmorillonite organise after modification using silane coupling agent KH560, modified montmorillonoid can be uniformly dispersed in urea In urea formaldehyde adhesive, the generation reunited is avoided, and then the stability of adhesive can be kept.
Hydrogenated rosin (hydrogenated rosin) it is amorphous transparent hard resin, containing dihydroabietic acid 75%, relatively Density 1.045,70~72 DEG C of softening point, refractive index 1.5270, viscosity (60% toluene solution) 3.6mPaS, acid value 162mgKOH/g, saponification number 167mgKOH/g, are dissolved in ethyl alcohol, acetone, dichloroethanes, carbon disulfide, toluene, pine by 203 DEG C of flash-point In fuel-economizing, petroleum ether, industrial naptha and vegetable oil, have that antioxygenic property is good, brittleness is small, thermal stability is high, the spies such as of light color Point can be used as antioxidant in adhesive.Its conventional production methods is using rosin as raw material, Pd/C for catalyst, using melting Method, under 210~270 DEG C, the high temperature and pressure of 10.0~25.0MPa plus hydrogen is made.The present invention applies hydrogenated rosin in ureaformaldehyde In Resin adhesive, hydrophobicity abietic acid (rosin main ingredient) is introduced in the polycondensation reaction of Lauxite and is used as side-chain radical, The modification of structural unit is carried out to Lauxite.Since there is conjugated double bonds in abietic acid molecule, easily contract with methylolurea Conjunction forms copolymer, meanwhile, the methylol in modified formaldehyde rosin is also easy to be condensed with imido grpup.Three kinds of condensation modes make hydroxyl first Base rosin and Lauxite are cross-linked to form tridimensional network, effectively improve the molecular structure of Lauxite, reduce ureaformaldehyde tree The speed of rouge release formaldehyde.
Phenolic resin is also bakelite, also known as phenolic moulding powder, be by phenol and formaldehyde under catalysts conditions polycondensation, it is neutralized, It washes and manufactured resin.It is soluble in alcohol, it is not soluble in water, water, weak acid, weak caustic solution are stablized.Phenolic resin has good Acid resistance, mechanical property, heat resistance can be used as the raw material of fire proofing or refractory material, with it is various organic and Inorganic filler all has good compatibility.
Anilinomethyl triethoxysilane added by the present invention belongs to silane coupling agent, can play coupling with Lauxite Effect, and participate in reaction and form new keys, the gumminess of urea-formaldehyde resin adhesive is improved, and enhance its water-fast, high temperature resistant, weatherability Energy.
Polyvinyl alcohol (polyvinyl alcohol,vinylalcohol polymer), white plates, cotton-shaped or powder Shape solid, it is tasteless, be dissolved in water (95 DEG C or more), be slightly soluble in dimethyl sulfoxide, insoluble in gasoline, kerosene, vegetable oil, benzene, toluene, Dichloroethanes, carbon tetrachloride, acetone, ethyl acetate, methanol, ethylene glycol etc..It can be used for manufacturing Pioloform, polyvinyl acetal, resistance to gasoline pipe Road and vinylon synthetic fibers, fabric-treating agent, emulsifier, paper coating, adhesive, glue etc..Applied in Lauxite The extra free formaldehyde of absorbable release, reduces the free formaldehyde content in Lauxite, can also improve the resistance to of Lauxite Aqueous and adhesion strength.
Acrylamide (Acrylamide) chemical formula C3H5NO, acrylamide is added in the present invention can have with dimethylol urea Effect absorbs the free formaldehyde in Lauxite, reduces the content of free formaldehyde.
Nanmeter antimong trioxide is also known as nanometer stibium trioxide, molecular formula: Sb2O3, fine white powder, belong to amphoteric oxide, be dissolved in Hydrochloric acid, potassium hydroxide, tartaric acid, vulcanized sodium, the concentrated sulfuric acid, concentrated nitric acid, not soluble in water, ethyl alcohol, dilute sulfuric acid.Brominated Polystyrene (abbreviation BPS) is white or pale yellow powder or particle, is a kind of bromine system organic fire-retardant, has high flame retardant, thermal stability And the good mechanical-physical such as photostability and chemical property, dispersibility and compatibility are good in high polymer.Brominated Polystyrene It is a kind of environmental protection fire retarding agent approved in the world, is free of polybrominated diphenyl ethers and polybrominated biphenyls, meets ROHS standard.Have and material The advantages such as compatibility is good, no precipitation, non-blooming, good electrical property, small on material mechanical performance influence, and price is low.Borax has very Good fire retardation, moreover it is possible to improve adhesive viscosity and water-fast, heat-resisting, corrosion-resistant performance.Antimony oxide belongs to addition type Fire retardant is often used in combination with other fire retardants, antismoke agent, can produce synergistic effect between each component.Antimony oxide burning initial stage, It is melting first, forms protective film on the surface of the material and completely cut off air, by the internal endothermic reaction, ignition temperature is reduced, in high temperature Antimony oxide is gasified under state, dilutes oxygen concentration in air, to play fire retardation.The present invention aoxidizes nanometer three The fire retardant of two antimony, brominated Polystyrene and borax triplicity as urea-formaldehyde resin adhesive, flame retardant effect are more preferable.
Montmorillonite, which is stored abundant, cheap and special construction naturally and become, prepares polymer nanocomposites most Common raw clay.The chemical formula of montmorillonite is (1/2 Ca, Na)0.66(Al,Mg,Fe)4[ (Si, Al)8O20(OH)4· nH2O is in stratiform or laminated structure, is mingled with an alumina octahedral by two oxygen-octahedrons and piles up, former by sharing oxygen Son forms the sandwich of sandwich form, and the thickness in monolayer of each of which crystal is 1nm or so, and surface transverse width reaches 100 nm.These design features make it show good cation exchange capacity (CEC), strong adsorptivity and surface-active.But due to a large amount of Inorganic ions is dispersed between cheating engaging layer, is made its surface in hydrophilic and oleophobic property, is unfavorable for dispersing in the polymer.Make in montmorillonite It is modified with preceding, increases its product good dispersion, thermal weight loss rate, and is improved with organic polymer resin compatibility, With certain anti-flammability, enhancing or the cooperative flame retardant that can be widely applied to high molecular material are modified.
Talcum powder (Talc) main component is the aqueous magnesium silicate of talcum, molecular formula Mg3[Si4O10](OH)2, talcum powder With lubricity, anti-stick, helps that stream, fire resistance, acid-resisting, insulating properties, fusing point are high, chemically torpescence, covering power are good, soft The excellent Wuli-Shili-Renli system approach such as soft, good luster, strong adsorption force, the present invention in mainly as filler.
The beneficial effects of the present invention are:
1, the production method of Fireproof fire retardation type medium density fiber Special board for cabinet of the invention, using eucalyptus bark, branch and Manufacturing discarded leftover pieces remained by plate is primary raw material, adds other weedtrees, turns waste into wealth, and is that timber resources is comprehensive The effective way utilized is conducive to alleviate China's timber imbalance between supply and demand.Timber utilization rate of the invention is traditional mask-making technology 2.5~3 times, the Special board for cabinet quality product rate of preparation is more than 90%.
2, the modified paraffin that is added of the present invention belongs to macromolecule reaction type water repellent agent by being specifically formulated and technique is made, Efficiently firm combine can be carried out by electrostatic attraction and macromolecule winding effect and fiber to achieve the purpose that be glued waterproof, be The high-effect water-proof agent of low cost, can be improved water-fast weatherability, anti-flammability and the compressive property of Special board for cabinet.
3, the flame-retarded urea-formaldehyde Resin adhesive obtained under process conditions of the present invention has good fire-retardant, waterproof Moisture-proof performance, gumminess is good, and through detecting, free formaldehyde content is 0.15~0.17%, is far below 14732 " timber of GB/T Industrial adhesive ureaformaldehyde, phenolic aldehyde, melamine resin " in≤0.3% standard requirements.
4, the production method of Fireproof fire retardation type medium density fiber Special board for cabinet of the present invention, timber are first dried in the air using preceding 15~20 days (timing after felling) is set, mouldy, generation blackspot is avoided, the wood waste by stacking easily crushes, timber Fragment pick-up rate is high;Strict control good boiling degree when boiling wood shavings, modified paraffin and flame-retarded urea-formaldehyde Resin adhesive Straying quatity also passes through stringent control, in order to avoid influence the quality of production board.According to medium density fiber cabinet made from strict technology Personality board, fire retardant performance is good, and water-tolerant, content of formaldehyde is low, and intensity is high, and good toughness is safe and environment-friendly practical cupboard Cabinet personality board.
5, the flame-retarded urea-formaldehyde Resin adhesive that the present invention uses replaces part formaldehyde to be reacted using paraformaldehyde, and Furfural is added and hydrogenated rosin is modified it, furfural has aldehyde radical, dialkylene ether functional group, passes through cocondensation in Lauxite Poly- effect introduces hydrophobic bond, can effectively improve the water resistance of Lauxite;Hydrogenated rosin is in the polycondensation reaction of Lauxite Introduce hydrophobicity abietic acid be used as side-chain radical, to Lauxite progress structural unit modification, due in abietic acid molecule there is Conjugated double bond easily occurs condensation with methylolurea and forms copolymer, meanwhile, the methylol in modified formaldehyde rosin is also easy to and Asia Amido condensation;Three kinds of condensation modes make methylol rosin and Lauxite be cross-linked to form tridimensional network, effectively improve urea The molecular structure of urea formaldehyde reduces the speed of Lauxite release formaldehyde, to reduce the content of free formaldehyde in adhesive.
6, the fire retardant used in the present invention is nanmeter antimong trioxide, brominated Polystyrene, borax ratio 1:1:2 by weight It is mixed, antimony oxide belongs to additive flame retardant, is often used in combination with other fire retardants, antismoke agent, can produce between each component Synergistic effect, antimony oxide are melting first at burning initial stage, form protective film on the surface of the material and completely cut off air, by interior Portion's endothermic reaction reduces ignition temperature, and antimony oxide is gasified at high operating temperatures, dilutes oxygen concentration in air, thus Play fire retardation.Brominated Polystyrene has good mechanical-physical and the changes such as high flame retardant, thermal stability and photostability Property is learned, contains polybrominated diphenyl ethers and polybrominated biphenyls, meets ROHS standard, there is good, no precipitation with material compatibility, it is non-blooming, Good electrical property influences small, the advantages such as price is low on material mechanical performance.Borax has good fire retardation, moreover it is possible to improve glue The viscosity of glutinous agent and water-fast, heat-resisting, corrosion-resistant performance.The present invention is by nanmeter antimong trioxide, brominated Polystyrene and borax three Person is combined as the fire retardant of urea-formaldehyde resin adhesive, and flame retardant effect is more preferable.
Specific embodiment
Technical solution of the present invention is introduced in order to more detailed, below with reference to embodiment, the present invention is done furtherly It is bright.
Embodiment 1
A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet, specific steps are as follows:
(1) pretreatment of raw material: Eucalyptus leftover pieces are uniformly mixed with other weedtrees according to weight ratio 1:0.3, cut into length 3~ The fragment of 5cm, 0.5~0.7cm of width;
The Eucalyptus leftover pieces include eucalyptus bark, branch and manufacture plate remained by discarded leftover pieces;Described is miscellaneous Wood includes pine, linden, birch, Manchurian ash, willow Eucalyptus, and timber is first hung 15 days using preceding;
(2) it sieves: wood shavings obtained above is sieved, remove silt and partial size is less than the powder of 0.2cm, and pass through Strong magnetic inspiration row removes iron;
(3) boiling softens: wood shavings being transported in cooker, adds suitable quantity of water to impregnate 15min, is then passed through steaming to cooker Vapour, holding pressure inside the tank are 0.18Mpa, boiling 2min, and the cork sheet that water content is 75% is obtained after boiling;
(4) grind: the cork sheet that boiling is obtained is transported to refiner and grinds, revolving speed 2000r/min, grinds 8min, makes Its fiber separation;
(5) it is glued, is dry: the fiber of milled being passed through in drying duct, is uniformly sprayed into from pipeline upper and lower ends with Sprayable Modified paraffin lotion lotion and flame-retarded urea-formaldehyde Resin adhesive, are passed through hot wind and are dried, and pipeline intake air temperature is 162 DEG C, Discharge port temperature be 65 DEG C, finally pass through cyclone separator or venturi separator, obtain moisture content be 9% fiber, convey into Pan feeding storage is deposited;Exhaust steam is used to heat the water in cooker through over-heat-exchanger;
(6) precompressed: fiber is mated formation into continuous fluffy slab band through spreading machine, and is put down by scraping plain-barreled roll, extra fiber is logical It crosses blast system and sends feed bin back to;After gauge check, qualified fluffy slab band, which enters continuous strip formula preformer, to be carried out in advance Pressure, preload pressure 0.4Mpa, squeeze time 30min;
(7) hot pressing: the slab after precompressed is sent into hot press after cutting edge, truncation and carries out hot pressing, and hot pressing temperature is 255 DEG C, 100s is suppressed under the conditions of 1.0Mpa, 60s is suppressed under the conditions of 0.5Mpa, obtains heating platen;
(8) saw sanction, sanding: heating platen passes through cold front heavy rain 5min, places 60h at room temperature, and saw is cut into fixed specification, two facing sands Light is to get medium density fibre board (MDF);
Medium density fiber the plate thickness 5.0cm, density 0.7g/cm3, moisture content is no more than 10%;
(9) veneer hot pressing: selection medium density fibre board (MDF) smooth, in homogeneous thickness, as substrate layer, with moisture-proof Lauxite gluing Agent carries out assembly;One layer of decorative layer is sticked on surface, puts aluminum oxide wear layer again in decorative layer, carries out heat into hot press Pressure, hot pressing pressure 1.0MPa, hot pressing temperature are 120 DEG C, hot pressing time 2min;
(10) edge sealing: surrounding is with aluminium alloy fringing to get ground Special board for cabinet after cooling.
The straying quatity of modified paraffin lotion and flame-retarded urea-formaldehyde Resin adhesive described in step (5) are as follows: every cubic metre of timber Fragment applies 10kg modified paraffin lotion and 160kg flame-retarded urea-formaldehyde Resin adhesive.
The modified paraffin is prepared from the following raw materials in parts by weight: 70 parts of paraffin, 15 parts of chlorinated paraffin, and polyethylene 20 Part, 5 parts of polysorbas20,5 parts of turpentine oil, 10 parts of calcium stearate, 3 parts of sodium carboxymethylcellulose;The system of the modified paraffin lotion Preparation Method are as follows: by heating paraffin to 58 DEG C, emulsifying wax is added and stirs evenly, polyethylene, polysorbas20, turpentine oil, stearic acid is added Calcium and sodium carboxymethylcellulose react 2h under the conditions of 90 DEG C, cooling, and modified paraffin can be obtained.
The flame-retarded urea-formaldehyde Resin adhesive is prepared from the following raw materials in parts by weight: 25 parts of paraformaldehyde, formaldehyde 45 Part, 160 parts of urea, 15 parts of furfural, 5 parts of modified montmorillonoid, 5 parts of hydrogenated rosin, 10 parts of phenolic resin, 5 parts of talcum powder, formaldehyde is caught Catch 6 parts of agent, 2 parts of fire retardant, 0.5 part of anilinomethyl triethoxysilane.
The formaldehyde catching agent is polyvinyl alcohol, dimethylol urea and acrylamide ratio 5:2:3 by weight mixing system At;The fire retardant is nanmeter antimong trioxide, brominated Polystyrene, borax ratio 1:1:2 by weight are mixed.
The modified montmorillonoid the preparation method comprises the following steps: (1) by montmorillonite dissolve in water carry out ultrasound, be added montmorillonite it is total The sodium pyrophosphate of weight 3%, stirs evenly, and the hydrochloric acid regulation system pH6 that mass fraction is 0.1 mol/L is added;Then by solution Sedimentation is centrifuged, and is washed, drying, obtains purifying montmorillonite;(2) purifying montmorillonite is dissolved in water, montmorillonite total weight 3% is added Silane coupling agent KH560, be heated to 90 DEG C, react 1h, products therefrom is filtered, is washed, is dried, is sieved to get changing Property montmorillonite.
The preparation method of the flame-retarded urea-formaldehyde Resin adhesive, urea are added in four times, and furfural is added in two portions, specifically Steps are as follows:
(1) formaldehyde is added in reactor, is warming up to 50 DEG C, add the urea of total weight 50%, 70% furfural, be added and be modified Montmorillonite is to slowly warm up to 80 DEG C with NaOH solution tune pH to 8.0, reacts 50min;
(2) with formic acid tune pH to 6.0, the urea and hydrogenated rosin of total weight 30% is added, keeps 80 DEG C of reaction 30min;
(3) with NaOH solution tune pH to 8.0, paraformaldehyde is added, then adds up the urea and remaining furfural of weight 10%, stirs Fire retardant and titanate coupling agent are added after uniformly, keeps 88 DEG C of reaction 40min;
(4) with formic acid tune pH to 6.0, remaining urea is added, reacts 30min, adjusts pH to 7.0, is cooled to 35 DEG C or less blowings, Obtain modified urea-formaldehyde resin;
(5) phenolic resin, talcum powder and formaldehyde catching agent are added while stirring, keeps 85 DEG C of reaction 55min, is cooled to room temperature, Obtain flame-retarded urea-formaldehyde Resin adhesive.
Embodiment 2
A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet, specific steps are as follows:
(1) pretreatment of raw material: Eucalyptus leftover pieces are uniformly mixed with other weedtrees according to weight ratio 1:0.4, cut into length 3~ The fragment of 5cm, 0.8~1cm of width;
The Eucalyptus leftover pieces include eucalyptus bark, branch and manufacture plate remained by discarded leftover pieces;Described is miscellaneous Wood includes pine, linden, willow Eucalyptus, and timber is first hung 20 days using preceding;
(2) it sieves: wood shavings obtained above is sieved, remove silt and partial size is less than the powder of 0.2cm, and pass through Strong magnetic inspiration row removes iron;
(3) boiling softens: by 65~0.18Mpa of wood shavings, boiling 3min, the cork sheet that water content is 80% is obtained after boiling;
(4) grind: the cork sheet that boiling is obtained is transported to refiner and grinds, revolving speed 2500r/min, grinds 6min, makes Its fiber separation;
(5) it is glued, is dry: the fiber of milled being passed through in drying duct, is uniformly sprayed into from pipeline upper and lower ends with Sprayable Modified paraffin lotion lotion and flame-retarded urea-formaldehyde Resin adhesive, are passed through hot wind and are dried, and pipeline intake air temperature is 165 DEG C, Discharge port temperature be 75 DEG C, finally pass through cyclone separator or venturi separator, obtain moisture content be 8% fiber, convey into Pan feeding storage is deposited;Exhaust steam is used to heat the water in cooker through over-heat-exchanger;
(6) precompressed: fiber is mated formation into continuous fluffy slab band through spreading machine, and is put down by scraping plain-barreled roll, extra fiber is logical It crosses blast system and sends feed bin back to;After gauge check, qualified fluffy slab band, which enters continuous strip formula preformer, to be carried out in advance Pressure, preload pressure 0.6Mpa, squeeze time 20min;
(7) hot pressing: the slab after precompressed is sent into hot press after cutting edge, truncation and carries out hot pressing, and hot pressing temperature is 240 DEG C, 130s is suppressed under the conditions of 0.8Mpa, 20s is suppressed under the conditions of 0.7Mpa, obtains heating platen;
(8) saw sanction, sanding: heating platen passes through cold front heavy rain 8min, places 48h at room temperature, and saw is cut into fixed specification, two facing sands Light is to get medium density fibre board (MDF);
Medium density fiber the plate thickness 4.5cm, density 0.6g/cm3, moisture content is no more than 10%;
(9) veneer hot pressing: 2 pieces of medium density fibre board (MDF) smooth, in homogeneous thickness of selection, as substrate layer, with moisture-proof Lauxite Adhesive carries out assembly;One layer of decorative layer is sticked on surface, puts aluminum oxide wear layer again in decorative layer, is carried out into hot press Hot pressing, hot pressing pressure 1.3MPa, hot pressing temperature are 125 DEG C, hot pressing time 3min;
(10) edge sealing: surrounding is with aluminium alloy fringing to get ground Special board for cabinet after cooling.
The straying quatity of modified paraffin lotion and flame-retarded urea-formaldehyde Resin adhesive described in step (5) are as follows: every cubic metre of timber Fragment applies 8kg modified paraffin lotion and 155kg flame-retarded urea-formaldehyde Resin adhesive.
The modified paraffin is prepared from the following raw materials in parts by weight: 80 parts of paraffin, 10 parts of chlorinated paraffin, and polyethylene 25 Part, 10 parts of polysorbas20,10 parts of turpentine oil, 12 parts of calcium stearate, 2 parts of sodium carboxymethylcellulose;The modified paraffin lotion The preparation method comprises the following steps: emulsifying wax is added and stirs evenly, polyethylene, polysorbas20, turpentine oil, tristearin is added by heating paraffin to 50 DEG C Sour calcium and sodium carboxymethylcellulose react 1h under the conditions of 95 DEG C, cooling, and modified paraffin can be obtained.
The flame-retarded urea-formaldehyde Resin adhesive is prepared from the following raw materials in parts by weight: 35 parts of paraformaldehyde, formaldehyde 40 Part, 180 parts of urea, 15 parts of furfural, 7 parts of modified montmorillonoid, 10 parts of hydrogenated rosin, 5 parts of phenolic resin, 5 parts of talcum powder, formaldehyde is caught Catch 5 parts of agent, 3 parts of fire retardant, 1.0 parts of anilinomethyl triethoxysilane.
The formaldehyde catching agent is polyvinyl alcohol, dimethylol urea and acrylamide ratio 5:2:3 by weight mixing system At;The fire retardant is nanmeter antimong trioxide, brominated Polystyrene, borax ratio 1:1:2 by weight are mixed.
The modified montmorillonoid the preparation method comprises the following steps: (1) by montmorillonite dissolve in water carry out ultrasound, be added montmorillonite it is total The sodium pyrophosphate of weight 4%, stirs evenly, and the hydrochloric acid regulation system pH5 that mass fraction is 0.1 mol/L is added;Then by solution Sedimentation is centrifuged, and is washed, drying, obtains purifying montmorillonite;(2) purifying montmorillonite is dissolved in water, montmorillonite total weight 4% is added Silane coupling agent KH560, be heated to 85 DEG C, react 1.2h, products therefrom is filtered, is washed, is dried, be sieved to get Modified montmorillonoid.
The preparation method of the flame-retarded urea-formaldehyde Resin adhesive, urea are added in four times, and furfural is added in two portions, specifically Steps are as follows:
(1) formaldehyde is added in reactor, is warming up to 60 DEG C, add the urea of total weight 60%, 80% furfural, be added and be modified Montmorillonite is to slowly warm up to 85 DEG C with NaOH solution tune pH to 8.5, reacts 40min;
(2) with formic acid tune pH to 5.8, the urea and hydrogenated rosin of total weight 20% is added, keeps 85 DEG C of reaction 20min;
(3) with NaOH solution tune pH to 8.0, paraformaldehyde is added, then adds up the urea and remaining furfural of weight 15%, stirs Fire retardant and titanate coupling agent are added after uniformly, keeps 88 DEG C of reaction 35min;
(4) with formic acid tune pH to 5.8, remaining urea is added, reacts 30min, adjusts pH to 7.4, is cooled to 35 DEG C or less blowings, Obtain modified urea-formaldehyde resin;
(5) phenolic resin, talcum powder and formaldehyde catching agent are added while stirring, keeps 88 DEG C of reaction 60min, is cooled to room temperature, Obtain flame-retarded urea-formaldehyde Resin adhesive.
Embodiment 3
A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet, specific steps are as follows:
(1) pretreatment of raw material: Eucalyptus leftover pieces are uniformly mixed with other weedtrees according to weight ratio 1:0.5, cut into length 3~ The fragment of 5cm, 0.5~0.6cm of width;
The Eucalyptus leftover pieces include eucalyptus bark, branch and manufacture plate remained by discarded leftover pieces;Described is miscellaneous Wood includes pine, linden, birch, Manchurian ash, willow Eucalyptus etc., and timber is first hung 18 days using preceding;
(2) it sieves: wood shavings obtained above is sieved, remove silt and partial size is less than the powder of 0.2cm, and pass through Strong magnetic inspiration row removes iron;
(3) boiling softens: wood shavings being transported in cooker, adds suitable quantity of water to impregnate 30min, is then passed through steaming to cooker Vapour, holding pressure inside the tank are 0.15Mpa, boiling 4min, and the cork sheet that water content is 85% is obtained after boiling;
(4) grind: the cork sheet that boiling is obtained is transported to refiner and grinds, revolving speed 23000r/min, grinds 5min, makes Its fiber separation;
(5) it is glued, is dry: the fiber of milled being passed through in drying duct, is uniformly sprayed into from pipeline upper and lower ends with Sprayable Modified paraffin lotion lotion and flame-retarded urea-formaldehyde Resin adhesive, are passed through hot wind and are dried, and pipeline intake air temperature is 160 DEG C, Discharge port temperature is 65 DEG C, finally passes through cyclone separator or venturi separator, obtains the fiber that moisture content is 10%, conveying It is stored into feed bin;Exhaust steam is used to heat the water in cooker through over-heat-exchanger;
(6) precompressed: fiber is mated formation into continuous fluffy slab band through spreading machine, and is put down by scraping plain-barreled roll, extra fiber is logical It crosses blast system and sends feed bin back to;After gauge check, qualified fluffy slab band, which enters continuous strip formula preformer, to be carried out in advance Pressure, preload pressure 0.5Mpa, squeeze time 25min;
(7) hot pressing: the slab after precompressed is sent into hot press after cutting edge, truncation and carries out hot pressing, and hot pressing temperature is 245 DEG C, 120s is suppressed under the conditions of 0.9Mpa, 40s is suppressed under the conditions of 0.6Mpa, obtains heating platen;
(8) saw sanction, sanding: heating platen passes through cold front heavy rain 3min, places 72h at room temperature, and saw is cut into fixed specification, two facing sands Light is to get medium density fibre board (MDF);
Medium density fiber the plate thickness 3.5cm, density 0.5g/cm3, moisture content is no more than 10%;
(9) veneer hot pressing: 3 pieces of medium density fibre board (MDF) smooth, in homogeneous thickness of selection, as substrate layer, with moisture-proof Lauxite Adhesive carries out assembly;One layer of decorative layer is sticked on surface, puts aluminum oxide wear layer again in decorative layer, is carried out into hot press Hot pressing, hot pressing pressure 1.5MPa, hot pressing temperature are 120 DEG C, hot pressing time 4min;
(10) edge sealing: surrounding is with aluminium alloy fringing to get ground Special board for cabinet after cooling.
The straying quatity of modified paraffin lotion and flame-retarded urea-formaldehyde Resin adhesive described in step (5) are as follows: every cubic metre of timber Fragment applies 10kg modified paraffin lotion and 190kg flame-retarded urea-formaldehyde Resin adhesive.
The modified paraffin is prepared from the following raw materials in parts by weight: 60 parts of paraffin, 20 parts of chlorinated paraffin, and polyethylene 15 Part, 8 parts of polysorbas20,8 parts of turpentine oil, 8 parts of calcium stearate, 5 parts of sodium carboxymethylcellulose;The system of the modified paraffin lotion Preparation Method are as follows: by heating paraffin to 60 DEG C, emulsifying wax is added and stirs evenly, polyethylene, polysorbas20, turpentine oil, stearic acid is added Calcium and sodium carboxymethylcellulose react 3h under the conditions of 85 DEG C, cooling, and modified paraffin can be obtained.
The flame-retarded urea-formaldehyde Resin adhesive is prepared from the following raw materials in parts by weight: 35 parts of paraformaldehyde, formaldehyde 50 Part, 200 parts of urea, 20 parts of furfural, 10 parts of modified montmorillonoid, 5 parts of hydrogenated rosin, 5 parts of phenolic resin, 5 parts of talcum powder, formaldehyde is caught Catch 3 parts of agent, 5 parts of fire retardant, 2 parts of anilinomethyl triethoxysilane.
The formaldehyde catching agent is polyvinyl alcohol, dimethylol urea and acrylamide ratio 5:2:3 by weight mixing system At;The fire retardant is nanmeter antimong trioxide, brominated Polystyrene, borax ratio 1:1:2 by weight are mixed.
The modified montmorillonoid the preparation method comprises the following steps: (1) by montmorillonite dissolve in water carry out ultrasound, be added montmorillonite it is total The sodium pyrophosphate of weight 4%, stirs evenly, and the hydrochloric acid regulation system pH4 that mass fraction is 0.1mol/L is added;Then by solution Sedimentation is centrifuged, and is washed, drying, obtains purifying montmorillonite;(2) purifying montmorillonite is dissolved in water, montmorillonite total weight 3% is added Silane coupling agent KH560, be heated to 80 DEG C, react 2h, products therefrom is filtered, is washed, is dried, is sieved to get changing Property montmorillonite.
The preparation method of the flame-retarded urea-formaldehyde Resin adhesive, urea are added in four times, and furfural is added in two portions, specifically Steps are as follows:
(1) formaldehyde is added in reactor, is warming up to 60 DEG C, add the urea of total weight 55%, 75% furfural, be added and be modified Montmorillonite is to slowly warm up to 82 DEG C with NaOH solution tune pH to 7.8, reacts 40min;
(2) with formic acid tune pH to 5.5, the urea and hydrogenated rosin of total weight 25% is added, keeps 82 DEG C of reaction 26min;
(3) with NaOH solution tune pH to 7.8, paraformaldehyde is added, then adds up the urea and remaining furfural of weight 13%, stirs Fire retardant and titanate coupling agent are added after uniformly, keeps 92 DEG C of reaction 30min;
(4) with formic acid tune pH to 5.5, remaining urea is added, reacts 35min, adjusts pH to 7.0, is cooled to 35 DEG C or less blowings, Obtain modified urea-formaldehyde resin;
(5) phenolic resin, talcum powder and formaldehyde catching agent are added while stirring, keeps 85 DEG C of reaction 70min, is cooled to room temperature, Obtain flame-retarded urea-formaldehyde Resin adhesive.
Application Example
1, Hengxian County's wood-based plate Co., Ltd produces medium density fiber Special board for cabinet using method of the invention, through examining It surveys, the phenomenon that trial production does not have rubber granule and layering over the past half year, in plate layer, sand trace and sand leakage phenomenon occurs less than 1%, it is raw Obtained high-class product is produced up to 93% or more.

Claims (8)

1. a kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet, it is characterised in that: specific steps are as follows:
(1) pretreatment of raw material: Eucalyptus leftover pieces are uniformly mixed with other weedtrees according to weight ratio 1:0.3~0.5, growth is cut Spend the fragment of 3~5cm, 0.5~1cm of width;
(2) it sieves: wood shavings obtained above is sieved, remove silt and partial size is less than the powder of 0.2cm, and pass through Strong magnetic inspiration row removes iron;
(3) boiling softens: wood shavings is transported in cooker, suitable quantity of water is added to impregnate 15~30min, it is then logical to cooker Enter steam, holding pressure inside the tank is 0.15~0.18Mpa, 2~4min of boiling, obtained after boiling water content be 75~85% it is soft Wood chip;
(4) grind: the cork sheet that boiling is obtained is transported to refiner and grinds, 2000~3000r/min of revolving speed, grinding 5 ~8min makes its fiber separation;
(5) it is glued, is dry: the fiber of milled being passed through in drying duct, is uniformly sprayed into from pipeline upper and lower ends with Sprayable Modified paraffin lotion lotion and flame-retarded urea-formaldehyde Resin adhesive, are passed through hot wind and are dried, pipeline intake air temperature be 160~ 165 DEG C, discharge port temperature be 65~75 DEG C, finally pass through cyclone separator or venturi separator, obtain moisture content be 8~ 10% fiber delivers into feed bin storage;Exhaust steam is used to heat the water in cooker through over-heat-exchanger;
(6) precompressed: fiber is mated formation into continuous fluffy slab band through spreading machine, and is put down by scraping plain-barreled roll, extra fiber is logical It crosses blast system and sends feed bin back to;After gauge check, qualified fluffy slab band, which enters continuous strip formula preformer, to be carried out in advance Pressure, preload pressure are 0.4~0.6Mpa, 20~30min of squeeze time;
(7) hot pressing: the slab after precompressed is sent into hot press after cutting edge, truncation and carries out hot pressing, and hot pressing temperature is 240~255 DEG C, 100~130s is suppressed under the conditions of 0.8~1.0Mpa, and 20~60s is suppressed under the conditions of 0.5~0.7Mpa, obtains hot pressing Plate;
(8) saw sanction, sanding: heating platen passes through 3~8min of cold front heavy rain, places 48~72h at room temperature, and saw is cut into fixed specification, Two sides sanding is to get medium density fibre board (MDF);
(9) veneer hot pressing: 1~3 piece of medium density fibre board (MDF) smooth, in homogeneous thickness of selection, as substrate layer, with moisture-proof ureaformaldehyde tree Rouge adhesive carries out assembly;One layer of decorative layer is sticked on surface, puts aluminum oxide wear layer again in decorative layer, into hot press into Row hot pressing, hot pressing pressure are 1.0~1.5MPa, and hot pressing temperature is 120~130 DEG C, and hot pressing time is 2~4min;
(10) edge sealing: surrounding is with aluminium alloy fringing to get ground Special board for cabinet after cooling.
2. the production method of Fireproof fire retardation type medium density fiber Special board for cabinet according to claim 1, it is characterised in that: The straying quatity of modified paraffin lotion and flame-retarded urea-formaldehyde Resin adhesive described in step (5) are as follows: every cubic metre of wood shavings applies 5 ~10kg modified paraffin lotion and 155~190kg flame-retarded urea-formaldehyde Resin adhesive.
3. the production method of Fireproof fire retardation type medium density fiber Special board for cabinet according to claim 1, it is characterised in that: Medium density fiber 3.5~7.0cm of plate thickness, 0.5~0.7g/cm of density described in step (8)3, moisture content is no more than 10%.
4. the production method of Fireproof fire retardation type medium density fiber Special board for cabinet according to claim 1, it is characterised in that: The modified paraffin is prepared from the following raw materials in parts by weight: 60~80 parts of paraffin, 10~20 parts of chlorinated paraffin, and polyethylene 15 ~25 parts, 5~10 parts of polysorbas20,5~10 parts of turpentine oil, 8~12 parts of calcium stearate, 2~5 parts of sodium carboxymethylcellulose;It is described Modified paraffin lotion the preparation method comprises the following steps: by heating paraffin to 50~60 DEG C, emulsifying wax is added and stirs evenly, poly- second is added Alkene, polysorbas20, turpentine oil, calcium stearate and sodium carboxymethylcellulose react 1~3h under the conditions of 85~95 DEG C, cooling, i.e., Modified paraffin can be obtained.
5. the production method of Fireproof fire retardation type medium density fiber Special board for cabinet according to claim 1, it is characterised in that: The flame-retarded urea-formaldehyde Resin adhesive is prepared from the following raw materials in parts by weight: 25~35 parts of paraformaldehyde, formaldehyde 40~50 Part, 150~200 parts of urea, 10~20 parts of furfural, 5~10 parts of modified montmorillonoid, 5~10 parts of hydrogenated rosin, phenolic resin 5~ 10 parts, 5~10 parts of talcum powder, 3~6 parts of formaldehyde catching agent, 2~5 parts of fire retardant, anilinomethyl triethoxysilane 0.5~2 Part.
6. the production method of Fireproof fire retardation type medium density fiber Special board for cabinet according to claim 5, it is characterised in that: The formaldehyde catching agent is that polyvinyl alcohol, dimethylol urea and acrylamide ratio 5:2:3 by weight are mixed;Described Fire retardant is nanmeter antimong trioxide, brominated Polystyrene, borax ratio 1:1:2 by weight are mixed.
7. the production method of Fireproof fire retardation type medium density fiber Special board for cabinet according to claim 5, it is characterised in that: The modified montmorillonoid the preparation method comprises the following steps: (1) by montmorillonite dissolve in water carry out ultrasound, be added montmorillonite total weight 2~ 4% sodium pyrophosphate, stirs evenly, and hydrochloric acid regulation system pH4~7 that mass fraction is 0.1~0.2 mol/L are added;Then will Solution sedimentation, is centrifuged, and washs, drying, obtains purifying montmorillonite;(2) purifying montmorillonite is dissolved in water, montmorillonite gross weight is added The silane coupling agent KH560 of amount 3~5% is heated to 80~90 DEG C, reacts 1~2h, products therefrom is filtered, wash, is dried Dry, sieving is to get modified montmorillonoid.
8. the production method of Fireproof fire retardation type medium density fiber Special board for cabinet according to claim 5, it is characterised in that: The preparation method of the flame-retarded urea-formaldehyde Resin adhesive, urea are added in four times, and furfural is added in two portions, and specific steps are such as Under:
(1) formaldehyde is added in reactor, is warming up to 50~60 DEG C, add total weight 50~60% urea, 70~80% Modified montmorillonoid is added in furfural, with NaOH solution tune pH to 7.8~8.5, is to slowly warm up to 80~85 DEG C, and reaction 40~ 50min;
(2) with formic acid tune pH to 5.5~6.0, the urea and hydrogenated rosin of total weight 20~30% is added, 80~85 DEG C of holding anti- Answer 20~30min;
(3) with NaOH solution tune pH to 7.5~8.0, paraformaldehyde is added, then adds up the urea of weight 10~15% and remaining Furfural is stirring evenly and then adding into fire retardant and titanate coupling agent, keeps 88~92 DEG C of 30~40min of reaction;
(4) with formic acid tune pH to 5.5~6.0, remaining urea is added, reacts 30~40min, adjusts pH to 7.0~7.4, it is cooling To 35 DEG C or less blowings, modified urea-formaldehyde resin is obtained;
(5) pH to 7.0~7.4 is adjusted, phenolic resin, talcum powder and formaldehyde catching agent are added while stirring, 85~88 DEG C of holding anti- 50~70min is answered, room temperature is cooled to, obtains flame-retarded urea-formaldehyde Resin adhesive.
CN201811320370.8A 2018-11-07 2018-11-07 A kind of production method of Fireproof fire retardation type medium density fiber Special board for cabinet Withdrawn CN109366667A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110076859A (en) * 2019-03-27 2019-08-02 深圳市吴越物流有限公司广州分公司 A kind of preparation method of fire-retardant anti-mildew container bottom board
CN111775256A (en) * 2020-06-30 2020-10-16 惠州市岳鑫人造板有限公司 Preparation method of energy-saving wood fiber
CN112223450A (en) * 2020-11-02 2021-01-15 石家庄华杰木业有限公司 Surface flame-retardant artificial board

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110076859A (en) * 2019-03-27 2019-08-02 深圳市吴越物流有限公司广州分公司 A kind of preparation method of fire-retardant anti-mildew container bottom board
CN111775256A (en) * 2020-06-30 2020-10-16 惠州市岳鑫人造板有限公司 Preparation method of energy-saving wood fiber
CN112223450A (en) * 2020-11-02 2021-01-15 石家庄华杰木业有限公司 Surface flame-retardant artificial board

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