CN109382887A - A kind of preparation method of environment-friendly type formaldehyde absorbing particieboard - Google Patents

A kind of preparation method of environment-friendly type formaldehyde absorbing particieboard Download PDF

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CN109382887A
CN109382887A CN201811166955.9A CN201811166955A CN109382887A CN 109382887 A CN109382887 A CN 109382887A CN 201811166955 A CN201811166955 A CN 201811166955A CN 109382887 A CN109382887 A CN 109382887A
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particieboard
preparation
environment
formaldehyde
friendly type
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CN109382887B (en
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苏小舟
栗蕾
黄伟韩
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Zhongyuan University of Technology
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Zhongyuan University of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • 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
    • B27N1/0209—Methods, e.g. characterised by the composition of the agent
    • 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The present invention discloses a kind of preparation method of environment-friendly type formaldehyde absorbing particieboard, can be applied to Furniture manufacture material and self-contained field, and the ability of formaldehyde produced by decomposing and volatile organic matter is echoed with self-priming.Its preparation process are as follows: condensation tanninoids are mixed according to arbitrary proportion, are crushed；Binding agent powder is mixed with water, and pH value is adjusted between 7.5-9.0；Condensation tanninoids, which are added in particieboard, to be stirred, and calper calcium peroxide and reinforcing fiber stirring is added.Prepared raw material is added in hot press, hot pressing is carried out, prepares environment-friendly type formaldehyde absorbing wood shavings board finished product.The present invention starts with from the change of the processing ingredient of particieboard, fundamentally solve the problems, such as that wood shavings board machining process bring formaldehyde discharges for a long time, it is the method for a kind of effective and low-cost processing particieboard Form aldehyde release problem, there is good market prospects and application range.

Description

A kind of preparation method of environment-friendly type formaldehyde absorbing particieboard
Technical field
The present invention relates to Furniture manufacture materials and self-contained field to make common planning mainly by certain preparation method Card has the ability from absorption and decomposing formaldehyde and noxious volatile organic matter (TVOC).
Background technique
Particieboard is exactly to be processed into wood shavings or particle with timber leftover bits or other non-wood plants, apply adhesive and Plate made of other additive hot pressing.Divide single layer, three layers, size-grade particleboard by plate construction, it be called do particle board, Bagasse board.Recycling for timber is greatly improved in it, overcomes and solves product quality problem, in Furniture manufacture and interior Finishing field is widely used.China's particieboard is in starting using accounting far below other countries area at present Stage.Accounting of China's wood-based plate in the whole world reaches 50%, but accounting of the particieboard in China's wood-based plate be less than 10%, and The accounting of the regional particieboard such as Europe, Southeast Asia and North America is more than 50%.With national economy fast development and to naturally from The increase of right resources requirement, the safety of particieboard and feature of environmental protection problem also increasingly attract people's attention, also promote The research and development of related particieboard functional product.
Adhesive used in production particieboard can generally divide two major classes: protein adhesive and synthetic resin gum.Protein adhesive mesh Preceding not use substantially, synthetic resin gum has two class of urea-formaldehyde resin adhesive and phenolic resin glue, but based on urea-formaldehyde resin adhesive. Board quality made of it is good, and intensity is high, water-fast, heat resistance, and chemical stability is good.The resin glue dosage generally used Are as follows: lamina 8-12%, three-decker plate core layer, resin added 6-8%, surface layer 10-12%, grading structure plate are average Glue consumption is 8-10%.
The advantages that adhesive strength is high although Lauxite has, high to hot photostability, cheap, it, which is protruded, lacks Point is the main source that free formaldehyde content is high and particieboard Form aldehyde release is exceeded.Wherein measurement urea-formaldehyde glue free formaldehyde is released High-volume (FFE) can be divided into 3 indexs: and E1 is < 9m g/100g, E2 be < and 30m g/l00g, E3 be < 60 m g/100g, mesh Preceding China mainly uses E3 grades of products, and environment-friendly type arteries and veins aldehyde glue refers to El and E2 grades of arteries and veins aldehyde glue.El and E2 grades of dosage Less than 20 %.Most of enterprise's particieboard produced all has that formaldehyde excessively discharges.In addition, being hot pressed into particieboard In type manufacturing process, since the stability generated in resin by polymerization reaction poor methylol and dimethylene ehter bond are by outer Boundary is easily broken off decompositions when influencing, and can decompose a large amount of free formaldehyde of generation and toxic gas, in addition ureaformaldehyde in use Resin glue last decomposition can be discharged into external space at certain temperature and humidity, furthermore the hemicellulose of timber itself It decomposes, the methoxyl group key fracture in lignin, can also release a small amount of formaldehyde, this 3 kinds of formaldehyde sources make particieboard long-term The formaldehyde of sustained release low amounts in use process, usual release action can continue 3-15.Almost can not by externalist methodology Thoroughly solve the problems, such as its long-term release formaldehyde.
Removing the reliable processing method of formaldehyde at present mainly has photocatalytic oxidation, metal onidiges method, active carbon Absorption method and ozone absorption method etc., these to a certain extent with indoor formaldehyde and noxious volatile are able to solve in the short time The problem of organic matter (TVOC) excess, but these method effects have differences, effective method cost is higher, to consumption Person brings certain financial burden, cannot fundamentally solve the problems, such as persistence Form aldehyde release caused by sheet profile furniture. The present invention, from the technique for preparing particieboard, is formulated according to research on the basis of the above invention, a certain proportion of first is added Aldehyde absorption and decomposition components reduce particieboard production by a relatively large margin and use on the basis of not influencing particieboard service performance Generated formaldehyde discharges problem for a long time in the process, solves a series of problems brought by formaldehyde from product preparation source, is one Efficiently, inexpensive solves the method that formaldehyde endangers during plate produces and uses to kind, with good use value and popularization Prospect.
Summary of the invention
The invention proposes a kind of preparation methods of environment-friendly type formaldehyde absorbing particieboard, in the process of particieboard, It is compounded according to a certain percentage using natural polymer degradable substance and the compound that can produce free radical, then by certain Special process preparation have from absorption and decomposing formaldehyde and all kinds of TVOC pollutants Chipboard.
It realizes the technical scheme is that a kind of preparation method of environment-friendly type formaldehyde absorbing particieboard, steps are as follows:
(1) compounding and preliminary working of tanninoids are condensed: condensation tanninoids are crushed between 200-500 mesh；
(2) preparation of adhesive: the adhesive containing formaldehyde is mixed with water, is adjusted to its pH value using sodium hydroxide solution Between 7.5-9.0；
(3) from the preparation of formaldehyde adsorption particieboard: condensation tanninoids being stirred evenly with wood wool, bonding is sprayed into whipping process Agent is added calper calcium peroxide and reinforcing fiber, is uniformly mixing to obtain hot pressing raw material；
(4) the hot pressing raw material that step (3) obtains is carried out hot-forming in hot press, obtains formaldehyde absorbing particieboard.
Condensation tanninoids are larch tannin, wattle skin tanning, quebracho tannin, Albizzia kalkora bark tannin in the step (1) Or any one in shaddock mandarin orange bark tannin.
The adhesive containing formaldehyde is in phenolic resin, Lauxite or melamine resin in the step (2) Any one.
The mass ratio of the adhesive containing formaldehyde and water is 1:(1-3 in the step (2)).
The step (3) is condensed adding for tanninoids, calper calcium peroxide and reinforcing fiber on the basis of the gross mass of hot pressing raw material Entering amount is respectively 2.5-5.5%, 0.2-0.5%, 0.1-0.3%.
Condensation tanninoids and wood wool are added in the step (3) with the revolving speed stirring 10-15min of 400-600 turns/min 5-8min is stirred under conditions of revolving speed 600-800 turns/min after calper calcium peroxide and reinforcing fiber.
Hot pressing temperature is 180 DEG C, pressure 10-15Mpa, hot pressing time 10-15min in the step (4).
The plate density of the formaldehyde absorbing particieboard is 0.8-1.1g/cm3。
Reinforcing fiber in the step (3) is that Fanglun slurry cake, polypropylene fibre, polyacrylonitrile fibre or polyester fiber are short Any one in fiber.
The additional amount of adhesive is the 10-12% of hot pressing material quality in the step (3).
Formaldehyde absorbing substance is condensed tanninoids: larch tannin, wattle skin tanning, quebracho tannin, Albizzia kalkora tree by the present invention Skin tannin, shaddock mandarin orange bark tannin are crushed to particle size range between 200-500 mesh as the main component of formaldehyde absorbing. These tannins are condensation tanninoids, and molecular weight ranges are a kind of natural macromolecular materials between 1000-3000.These tans The main component of matter is catechin+catechin pentamer+catechin heptamer+penta catechin etc..The condensation of certain fineness Tanninoids on the one hand there is biggish specific surface area and natural aperture, can adsorb and capture formaldehyde produced by particieboard and its His pernicious gas.
On the other hand condensation tanninoids can gradually degrade under the action of high temperature, moisture, be degraded to catechin and table catechu Plain monomer.The degradation of this kind of condensation tanninoids can continue to carry out, and can persistently play and inhale in the use process of particieboard The effect of attached formaldehyde.Its absorption principle are as follows: catechin, epicatechin there is always resorcinol and phloroglucin A ring on have one Strong necleophilic reaction center, that is, 6, A ring and 8, are specifically shown in following formula:
Under alkaline condition, formaldehyde can react as electrophilic reagent with above-mentioned necleophilic reaction center, form polyphosphazene polymer Object is closed,
Formula is seen below by the tannin molecule that formaldehyde crosslinking reacts:
Tannin molecule by degradation can be crosslinked with formaldehyde to react, and forms the macromolecule by stablizing methylene bridge connection Substance, the active group of such polymer substance compare crosslinking before greatly reduce, can be stabilized, and will not be further continued for Release harmful substance is decomposed, and being formed by polymer is a kind of polymer substance, it is smaller to the strong influence of particieboard.
The present invention is also added into a certain amount of peroxide while the use of condensation tanninoids being the ingredient of main formaldehyde adsorption Change calcium (0.2-0.5% that additional amount is particieboard gross mass) as auxiliary decomposing formaldehyde and the ingredient of TVOC.Calper calcium peroxide is also known as Calcium dioxide is insoluble in water for white or light yellow crystalline powder, odorless, tasteless, does not dissolve in the organic solvents such as ethyl alcohol, ether, It being heated to starting to decompose at 315 DEG C, temperature reaches 400~425 DEG C and decomposes completely, and it is highly stable under conditions of air drying, Preparing 180 DEG C of particieboard or so of high temperature will not decompose.Principle as auxiliary adding ingredient is: it is in room temperature Under, or encounter the micro-moisture period of the day from 11 p.m. to 1 a.m and can slowly decompose and generate hydroxyl radical free radical (OH) and Superoxide anion free radical (O2), such free radical by the free formaldehyde in particieboard and can be oxidized to volatile organic matter (TVOC) and be oxidized to nothing Harmful CO2And water, while the free radical that calper calcium peroxide generates can will be condensed the dark quinones substance that tanninoids aoxidize generation again Oxidation, it is therefore prevented that particieboard darkens the influence caused by presentation quality.The addition of calper calcium peroxide is put into wood shavings and condensation class Tannin is added after whipping step, stirs 5-8min under conditions of revolving speed 600-800 turns/min.
The beneficial effects of the present invention are: the present invention is added to enhanced fiber in particieboard ingredient, the purpose is to reduce The addition of tanninoids is condensed to particieboard mechanical property adverse effect, plays the work of enhancing particieboard bond strength With simultaneously as the presence of fiber, capillarity can be used as the channel that steam and gas transport, and improve formaldehyde absorbing And the work area and efficiency of ingredient are decomposed, additive amount controls the available increasing between the 0.1-0.3% of particieboard gross mass Strong type fiber mainly includes Fanglun slurry cake, polypropylene fibre, polyacrylonitrile fibre, polyester fiber staple fiber.
The present invention utilizes larch tannin, and wattle skin tanning, quebracho tannin, Albizzia kalkora bark tannin, shaddock mandarin orange bark tannin is The formaldehyde absorbing ingredient of particieboard has and works well, and not degradable feature can be held in the use process of particieboard Continuous formaldehyde adsorption.
Start with from the change of the processing ingredient of particieboard, it is long fundamentally to solve wood shavings board machining process bring formaldehyde Phase discharges problem.And be all solves the problems, such as Form aldehyde release outside the particieboard compared to more other methods, it cannot from source and at all It is upper to solve the problems, such as Form aldehyde release.It is the method for a kind of effective and low-cost processing particieboard Form aldehyde release problem, has good Good market prospects and application range.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that institute The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, Those of ordinary skill in the art's every other embodiment obtained under that premise of not paying creative labor, belongs to this hair The range of bright protection.
Embodiment 1
A kind of preparation method of environment-friendly type formaldehyde absorbing particieboard, can be divided into following steps:
1. being condensed the compounding and preliminary working of tanninoids: formaldehyde absorbing substance is condensed tanninoids larch tannin, wattle skin tan System, quebracho tannin are mixed according to the ratio of 1:1:1, are continued to be crushed to 200 mesh of granularity using pulverizer after mixing.
2. the preparation of adhesive: urea formaldehyde resin adhesive being mixed with water according to the proportional region of 1:1, hydrogen is used It is spare that its pH value is adjusted to 8.0 by sodium hydroxide solution.
3. from the preparation of formaldehyde adsorption particieboard: setting glue spraying amount accounts for the 10% of gross mass.Absorbing formaldehyde ingredient is condensed class Tannin additional amount accounts for the 2.5% of particieboard gross mass, and plate density is 0.8g/cm3, by wood wool and class is condensed using blender Tannin mixing, stirs 10min under conditions of 400 turns/min of revolving speed, a certain amount of calper calcium peroxide is added, and (additional amount is wood shavings The 0.2% of plate gross mass), 0.1 reinforcing fiber Fanglun slurry cake staple fiber is added, is stirred under conditions of 600 turns/min of revolving speed 5min。
4. hot-forming: prepared raw material being added in hot press and carries out hot pressing, hot pressing parameters are provided that 180 DEG C of temperature, pressure 10Mpa, hot pressing time 10min.
Embodiment 2
A kind of preparation method of environment-friendly type formaldehyde absorbing particieboard, can be divided into following steps:
1. being condensed the compounding and preliminary working of tanninoids: formaldehyde absorbing substance is condensed tanninoids quebracho tannin, Albizzia kalkora bark tan Matter, shaddock mandarin orange bark tannin are mixed according to 2:1:1 ratio, are continued to be crushed to 300 mesh of granularity using pulverizer after mixing.
2. the preparation of adhesive: urea formaldehyde resin adhesive being mixed with water according to the proportional region of 1:2, hydrogen is used It is spare that its pH value is adjusted to 7.5 by sodium hydroxide solution.
3. from the preparation of formaldehyde adsorption particieboard: setting glue spraying amount (adhesive) accounts for the 11% of gross mass.Absorbing formaldehyde at Condensation tanninoids additional amount is divided to account for the 3% of particieboard gross mass, plate density is 0.9g/cm3, using blender by wood wool with It is condensed tanninoids mixing, 12min is stirred under conditions of 500 turns/min of revolving speed, a certain amount of calper calcium peroxide (additional amount is added For 0.3 % of particieboard gross mass), a kind of 0.2% reinforcing fiber polypropylene fibre is added, in the condition of 700 turns/min of revolving speed Lower stirring 6min.
4. hot-forming: prepared raw material being added in hot press and carries out hot pressing, hot pressing parameters are provided that 180 DEG C of temperature, pressure 12Mpa, hot pressing time 12min.
Embodiment 3
A kind of preparation method of environment-friendly type formaldehyde absorbing particieboard, can be divided into following steps:
1. being condensed the compounding and preliminary working of tanninoids: formaldehyde absorbing substance is condensed tanninoids: larch tannin, quebracho tannin It is mixed according to 1:1 ratio, is continued to be crushed to 400 mesh of granularity using pulverizer after mixing.
2. the preparation of adhesive: melamine adhesive being mixed with water according to the proportional region of 1:3, hydrogen is used Its pH value is adjusted to 8.5 by sodium hydroxide solution.
3. from the preparation of formaldehyde adsorption particieboard: setting glue spraying amount (adhesive) to the 12% of gross mass.Absorbing formaldehyde ingredient Condensation tanninoids additional amount accounts for the 4% of particieboard gross mass, and plate density is 1.0g/cm3, by wood wool and contracted using blender Tanninoids mixing is closed, stirs 13min under conditions of 550 turns/min of revolving speed, a certain amount of calper calcium peroxide is added, and (additional amount is 0.4 % of particieboard gross mass), the reinforcing fiber polyacrylonitrile fibre staple fiber of 0.25 % is added, 750 turns/min's of revolving speed Under the conditions of stir 7min.
4. hot-forming: prepared raw material being added in hot press and carries out hot pressing, hot pressing parameters are provided that 180 DEG C of temperature, pressure 13.5Mpa, hot pressing time 13min.
Embodiment 4
A kind of preparation method of environment-friendly type formaldehyde absorbing particieboard, can be divided into following steps:
1. be condensed tanninoids compounding and preliminary working: by formaldehyde absorbing substance be condensed the skin tanning of tanninoids wattle, quebracho tannin, Albizzia kalkora bark tannin is mixed according to 5:3:1, is continued to be crushed to 500 mesh of granularity using pulverizer after mixing.
2. the preparation of adhesive: urea formaldehyde resin adhesive being mixed with water according to the proportional region of 1:2, hydrogen is used It is spare that its pH value is adjusted to 9.0 by sodium hydroxide solution.
3. from the preparation of formaldehyde adsorption particieboard: setting glue spraying amount (adhesive) accounts for the 12% of gross mass.Absorbing formaldehyde at Condensation tanninoids additional amount is divided to account for the 5.5% of particieboard gross mass, plate density is 1.1g/cm3, using blender by wood wool It is mixed with condensation tanninoids, stirs 15min under conditions of 600 turns/min of revolving speed, a certain amount of calper calcium peroxide is added and (is added Amount is the 0.5% of particieboard gross mass), a kind of reinforcing fiber of 0.25 %: polyester fiber staple fiber is added, 800 turns of revolving speed/ 8min is stirred under conditions of min.
4. hot-forming: prepared raw material being added in hot press and carries out hot pressing, hot pressing parameters are provided that 180 DEG C of temperature, pressure 15Mpa, hot pressing time 15min.
It is as a result as follows by preparing the absorbing formaldehyde and mechanics performance determining (10 days) of embodiment to the above particieboard:
*Represent significant difference
Progress free formaldehyde release detection in 30-180 days after dispatching from the factory simultaneously to it, as a result as follows:
*Represent significant difference
It can be seen that embodiment control blank sample burst size of methanal by the above test result to substantially reduce (10 days), and (30-180 days) burst size of methanal is very low in the long-term time, is significantly less than the burst size of methanal of blank control.And its mechanics Even raising is also obtained in performances individually without too big change for performance and index comparison blank sample.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of preparation method of environment-friendly type formaldehyde absorbing particieboard, it is characterised in that steps are as follows:
(1) compounding and preliminary working of tanninoids are condensed: condensation tanninoids are crushed between 200-500 mesh；
(2) preparation of adhesive: the adhesive containing formaldehyde is mixed with water, is adjusted to its pH value using sodium hydroxide solution Between 7.5-9.0, adhesive is obtained；
(3) from the preparation of formaldehyde adsorption particieboard: condensation tanninoids being stirred evenly with wood wool, bonding is sprayed into whipping process Agent is added calper calcium peroxide and reinforcing fiber, is uniformly mixing to obtain hot pressing raw material；
(4) the hot pressing raw material that step (3) obtains is carried out hot-forming in hot press, obtains formaldehyde absorbing particieboard.
2. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (1) condensation tanninoids are in larch tannin, the tanning of wattle skin, quebracho tannin, Albizzia kalkora bark tannin or shaddock mandarin orange bark tannin in Any one.
3. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (2) adhesive in containing formaldehyde is any one in phenolic resin, Lauxite or melamine resin.
4. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (2) mass ratio of adhesive and water in containing formaldehyde is 1:(1-3).
5. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (3) on the basis of the gross mass of hot pressing raw material, the additional amount of condensation tanninoids, calper calcium peroxide and reinforcing fiber is respectively 2.5- 5.5%, 0.2-0.5% and 0.1-0.3%.
6. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (3) calper calcium peroxide and enhancing fibre is added with the revolving speed stirring 10-15min of 400-600 turns/min in condensation tanninoids and wood wool in 5-8min is stirred under conditions of revolving speed 600-800 turns/min after dimension.
7. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (4) hot pressing temperature is 180 DEG C, pressure 10-15Mpa, hot pressing time 10-15min in.
8. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the formaldehyde is inhaled The plate density of attached particieboard is 0.8-1.1g/cm3。
9. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (3) reinforcing fiber in is any one in Fanglun slurry cake, polypropylene fibre, polyacrylonitrile fibre or polyester fiber staple fiber Kind.
10. the preparation method of environment-friendly type formaldehyde absorbing particieboard according to claim 1, it is characterised in that: the step (3) additional amount of adhesive is the 10-12% of hot pressing material quality in.
CN201811166955.9A 2018-10-08 2018-10-08 Preparation method of environment-friendly formaldehyde adsorption shaving board Active CN109382887B (en)

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CN101693380A (en) * 2009-09-29 2010-04-14 北华大学 Straw particle board employing bark powder modified phenolic resins as adhesives
CN107349744A (en) * 2017-08-31 2017-11-17 无锡风正科技有限公司 A kind of Compositional type methyl aldehyde adsorption material and preparation method thereof
CN108393999A (en) * 2018-03-25 2018-08-14 南京林业大学 Tannin base adhesive particieboard and preparation method thereof

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* Cited by examiner, † Cited by third party
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CN1049820A (en) * 1990-09-29 1991-03-13 中国林业科学研究院林产化学工业研究所 Make the method for hardboard with condensed tannin extracts
US5858553A (en) * 1997-04-02 1999-01-12 Angus Chemical Company Oxazolidine-based hardeners for the room temperature cure of resorcinol resins in the bonding of wood articles
US6001286A (en) * 1997-08-28 1999-12-14 Archer Daniels Midland Company Material for enhancing water tolerance of composite boards
CN1880034A (en) * 2005-06-13 2006-12-20 北京克诺森华地板有限公司 Ultra-low formaldehyde content fibreboard
CN101205454A (en) * 2007-12-07 2008-06-25 东北林业大学 Wood-based panel adhesive using barks as raw material and preparation thereof
CN101693380A (en) * 2009-09-29 2010-04-14 北华大学 Straw particle board employing bark powder modified phenolic resins as adhesives
CN107349744A (en) * 2017-08-31 2017-11-17 无锡风正科技有限公司 A kind of Compositional type methyl aldehyde adsorption material and preparation method thereof
CN108393999A (en) * 2018-03-25 2018-08-14 南京林业大学 Tannin base adhesive particieboard and preparation method thereof

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