CN104610886A - Method for manufacturing environment-friendly density board product, and dedicated anti-aging agent - Google Patents
Method for manufacturing environment-friendly density board product, and dedicated anti-aging agent Download PDFInfo
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- CN104610886A CN104610886A CN201510000436.5A CN201510000436A CN104610886A CN 104610886 A CN104610886 A CN 104610886A CN 201510000436 A CN201510000436 A CN 201510000436A CN 104610886 A CN104610886 A CN 104610886A
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- potassium sulfate
- aluminum potassium
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- metaphosphate
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Abstract
The invention relates to a method for manufacturing an environment-friendly density board product and a dedicated anti-aging agent, and belongs to the technical field of medium density board manufacture. The method is characterized in that medium density fiberboards are manufactured, wherein not only a curing agent solution but also sodium metaphosphate and aluminum potassium sulfate are added during glue mixing; the additive amounts of sodium metaphosphate and aluminum potassium sulfate are determined by the yield of the medium density fiberboards, that is, 0.5-2.8 kg of sodium metaphosphate and 1-3 kg of aluminum potassium sulfate are added when one cubic meter of medium density fiberboards are manufactured. The method and the anti-aging agent have the benefits that on one hand, the shrinkage of an adhesive film can be prevented, on the other hand, the waterproof performance of the adhesive film can be improved, so that the waterproof performance and the moisture-proof performance of the medium density fiberboards can be improved, the anti-aging purpose can be achieved, and the service life of a medium density fiberboard product such as medium density fiberboard furniture can be prolonged; as the anti-aging performance of the medium density fiberboards is improved, the emission increasement of formaldehyde can be restricted, the safety performance and the environmental protection performance can be greatly improved, and then the application field of the medium density fiberboards can be extended.
Description
Technical field
The present invention relates to and a kind ofly produce the method for environment-friendly type density board product and special protective agent, belong to medium-density plate production technical field.
Background technology
Medium-density plate fiberboard is with wood fibre or other plant fiber for raw material, applies urea-formaldehyde resin or other glue paste be suitable for is made, and density is at 0.5 ~ 0.88g/cm
3sheet material.The density of medium-density plate is close to timber, and owing to being xylon is added glue paste formed by High Temperature High Pressure, its density ratio is comparatively even, and mechanical property, close to timber, is a kind of artificial board popular in the world.At present, medium density fibre board (MDF) makes furniture after being mainly used to veneer, and the medium density fiberboard goods on existing market are shorter for work-ing life, after use of being everlasting was more than 5 years, just there will be the phenomenons such as veneer comes off, door does not close, hinge falls down.Therefore the furniture of medium density fibre board (MDF) manufacture is commonly called " disposable furniture ", and this obviously can cause the waste of resource.
Occur that the reason of these problems is loss of properties on agings of tackiness agent, be mainly reflected in glued membrane heat cracked, meet water decomposition.Glued membrane after a period of time has passed, especially under wet environment and Exposure to Sunlight condition (particularly sun-drenched environment), there will be fracture Sum decomposition, causes sheet material mechanical properties decrease, and the work-ing life of sheet material shortens; Burst size of methanal also can increase, and exceeds environmental requirement index, causes people's living environment quality to decline.In addition, the poor density board in other words of medium density fiberboard moistureproofness does not possess very strong humidity resistance, after absorbing moisture content, the coefficient of expansion is larger, especially the medium density fibre board (MDF) using urea-formaldehyde resin adhesive to produce (such as toilet) under long-term moist environment is difficult to use, shortcoming in these performances, constrains the application of medium density fibre board (MDF) in the field such as furniture, building.
Summary of the invention
The object of the invention is to provide a kind ofly produces the method for environment-friendly type density board product and special protective agent, in glued membrane, introduce dispersion agent, the localised tension of glued membrane can be reduced, add expanded polystyrene veneer filler, when glued membrane shrinks, can complementary contraction space, thus reach ageing-resistant effect, increase waterproof and the humidity resistance of sheet material simultaneously, extend the work-ing life of medium density fiberboard goods, limit the increase of burst size of methanal simultaneously, ensure excellent environment, solve the problems referred to above existed in background technology.
Technical scheme of the present invention is:
Produce a special protective agent for environment-friendly type density board product, be made up of solidifying agent, sodium-metaphosphate and aluminum potassium sulfate, in curing agent solution, add sodium phosphate and aluminum potassium sulfate, make the special protective agent of production environment-friendly type density board product.
Described curing agent solution is public production medium-density plate fibre board use curing agent solution, such as: the composite solution of 20% ammonium chloride solution, 15 parts of ammonium chlorides and 5 parts of urea and 80 parts of water.
The weight adding sodium-metaphosphate and aluminum potassium sulfate in curing agent solution is: the medium-density plate fiberboard producing every cubic metre adds the sodium-metaphosphate of 0.5-2.8kg, adds the aluminum potassium sulfate of 1-3kg simultaneously.
Produce a method for environment-friendly type density board product, comprise following steps:
produce medium-density plate fiberboard, in impregnation process, except adding curing agent solution, also add sodium-metaphosphate and aluminum potassium sulfate;
sodium-metaphosphate and aluminum potassium sulfate add-on are determined by the output of producing medium-density plate fiberboard, and the medium-density plate fiberboard producing every cubic metre adds the sodium-metaphosphate of 0.5-2.8kg, adds the aluminum potassium sulfate of 1-3kg.
Describedly add sodium-metaphosphate and aluminum potassium sulfate, feed postition has three kinds:
by the sodium-metaphosphate of solid and aluminum potassium sulfate, disperse in the intermediate rubber tank of density board fiberboard aborning, finish using in one hour;
by the sodium-metaphosphate of solid and aluminum potassium sulfate, be mixed with the mixed aqueous solution of mass ratio 5-15%, add in the slurry pipe of density board fiberboard aborning;
3. the sodium-metaphosphate of solid and aluminum potassium sulfate are joined in curing agent solution, merge with curing agent solution in density board fiberboard aborning and use.
Described curing agent solution is public production medium-density plate fibre board use curing agent solution, such as: the composite solution of 20% ammonium chloride solution, 15 parts of ammonium chlorides and 5 parts of urea and 80 parts of water.
Described curing agent solution also can be special curing agent solution, solidifying agent solution: mixed by hydrogen sulfate ammonia and ammonium polyphosphate, mass ratio between hydrogen sulfate ammonia and ammonium polyphosphate is 0.6-1.5, by different ratios, form the liquid aqueous solution of different pH value, in liquid aqueous solution, the mass concentration of hydrogen sulfate ammonia is 5-20%, and in liquid aqueous solution, the mass concentration of ammonium polyphosphate is 3-25%; According to the wood chip fiber pH value of producing medium-density plate fiberboard, determine the pH value of liquid aqueous solution, wood chip fiber pH value 7.5-8, corresponding liquid aqueous solution pH value is 5.2-6.0.
Solidifying agent solution also adds sodium lauryl sulphate as dispersion agent, even to ensure with wood chip blending in of fibers; The add-on of sodium lauryl sulphate is 0.5-3% of hydrogen sulfate ammonia and ammonium polyphosphate total mass, and namely the mass ratio of sodium lauryl sulphate and solidifying agent is 0.5-3:100.
Use solidifying agent solution, heating platen medial temperature can be controlled and reduce 10-30 DEG C, avoid potential safety hazard that production hot operation brings and the harm that high temperature causes equipment, extend the work-ing life of equipment.
Adopt the present invention, because sodium-metaphosphate can have good dispersing property, make glued membrane can be good at dispersion, local starved can not be caused, stress point can not be formed by the many glue in local; Aluminum potassium sulfate can avoid the glued membrane of urea-formaldehyde glue to shrink the cracking caused, thus improves ageing-resistant performance.Because sodium-metaphosphate and aluminum potassium sulfate are neutral and weakly alkaline, can not cause negative impact to medium-density plate Fibreboard Production, the two does not have toxicity, can not cause negative impact to the use of medium-density plate fiberboard.
Positively effect of the present invention is: add sodium-metaphosphate metaphosphoric acid in curing agent solution and glued membrane can be made to be uniformly dispersed, dispersion tension force; Adding of aluminum potassium sulfate, can prevent glued membrane shrink and cracked, one aspect of the present invention can prevent glued membrane from shrinking, the water resistance of glued membrane can be improved on the other hand, add waterproof and the humidity resistance of sheet material, thus reach ageing-resistant object, the working life of medium density fiber slab products (as furniture) can be improved.Due to the raising of sheet material ageing-resistant performance, the increase of restriction burst size of methanal, ensure that the fine quality of environment, the performance of medium density fibre board (MDF) is greatly improved, and then widened the Application Areas of medium density fibre board (MDF).
Embodiment
Below by embodiment, the invention will be further described.
Embodiment one:
By the sodium-metaphosphate of solid and aluminum potassium sulfate, disperse in the intermediate rubber tank of density board fiberboard aborning, finish using in one hour; In the tundish of quantitative 600kg glue, add 3.5kg sodium-metaphosphate, add 6kg aluminum potassium sulfate, stir, be finished at one hour; Two tundish rotations are used to carry out.
Embodiment two:
By the sodium-metaphosphate of solid and aluminum potassium sulfate, be mixed with the mixed aqueous solution of mass ratio 5-15%, add in the slurry pipe of density board fiberboard aborning; The solution of the present embodiment preparation is called special protective agent solution: in 500L tank, add 300kg water, add 15kg sodium-metaphosphate, add 20kg aluminum potassium sulfate, before the glue spraying pump of density board fiberboard aborning, special protective agent solution and glue, mix according to the volume ratio of 1:20, adds glue spraying pump slurry pipe.
Embodiment three:
The sodium-metaphosphate of solid and aluminum potassium sulfate are joined in curing agent solution, merges with curing agent solution in density board fiberboard aborning and use.The solution of the present embodiment preparation is called special protective agent solution: in 500L tank, 300kg water, add 15kg sodium-metaphosphate, add 20kg aluminum potassium sulfate, before the spray curing agent solution pump of density board fiberboard aborning, special protective agent solution mixes with solidifying agent, and the solidifying agent adopted is the ammonium chloride solution of 20%, and special protective agent solution and ammonium chloride solution volume ratio are 1.5:2.
The ratio of sodium-metaphosphate and aluminum potassium sulfate is 0.5-1.2; By weight, the usage quantity of special protective agent is thousandth to thousand/tetra-five producing medium-density plate fiberboard.
Sodium-metaphosphate can make glued membrane evenly launch all the time in water He in drying process, can not cause local starved, can not form stress point by the many glue in local.The effect of aluminum potassium sulfate can prevent glue-line under cooling and sunlight, moist environment because of shrinking and produce embrittlement being hot-pressed onto, thus reach age inhibiting result of use.Due to the raising of medium-density plate fiberboard ageing-resistant performance, the increase of restriction burst size of methanal, ensure that the fine quality of environment.The performance of medium density fibre board (MDF) is greatly improved, and then has widened the Application Areas of medium-density plate fiberboard.
Add the sheet material of protective agent, the physical and mechanical property index at initial stage is little with the sheet material difference of normally producing, naturally placing after 1 year: sample 18mm sheet material being sawn into 500*500mm, often open plate and can saw 8 pieces, by at that time with the mensuration of different follow-up time, over time, main physico-mechanical performance index are measured.After getting 1 year that can obtain comparatively obviously data, index contrasts:
Embodiment one index:
MOR (MPa): after 25.8, one year: 24.9, conservation rate 96.5%
Expansion rate of water absorption (%): after 10.1, one year: 10.6, conservation rate: 95.3%
Embodiment two index:
MOR (MPa): after 26.3, one year: 25.3, conservation rate: 96.2%
Expansion rate of water absorption (%): after 10.0, one year: 10.7, conservation rate: 93.5%
Embodiment three index:
MOR (MPa): after 26.4, one year: 25.2, conservation rate: 95.5%
Expansion rate of water absorption (%): after 10.1, one year: 10.8, conservation rate: 93.5%
Background technology index (background technology does not add protective agent, and all the other are constant):
MOR (MPa): after 26.4, one year: 24.0, conservation rate: 91%
Expansion rate of water absorption (%): after 10.1, one year: 11.8, conservation rate: 85.6%
Conclusion: compared with the medium density fibre board (MDF) that the present invention and background technology are produced, MOR conservation rate has small size raising, and expansion rate of water absorption has greatly improved.
Curing agent solution of the present invention also can be special curing agent solution, solidifying agent solution: mixed by hydrogen sulfate ammonia and ammonium polyphosphate, mass ratio between hydrogen sulfate ammonia and ammonium polyphosphate is 0.6-1.5, by different ratios, form the liquid aqueous solution of different pH value, in liquid aqueous solution, the mass concentration of hydrogen sulfate ammonia is 5-20%, and in liquid aqueous solution, the mass concentration of ammonium polyphosphate is 3-25%; According to the wood chip fiber pH value of producing medium-density plate fiberboard, determine the pH value of liquid aqueous solution, wood chip fiber pH value 7.5-8, corresponding liquid aqueous solution pH value is 5.2-6.0.
Solidifying agent solution also adds sodium lauryl sulphate as dispersion agent, even to ensure with wood chip blending in of fibers; The add-on of sodium lauryl sulphate is 0.5-3% of hydrogen sulfate ammonia and ammonium polyphosphate total mass, and namely the mass ratio of sodium lauryl sulphate and solidifying agent is 0.5-3:100.
Use solidifying agent solution, heating platen medial temperature can be controlled and reduce 10-30 DEG C, avoid potential safety hazard that production hot operation brings and the harm that high temperature causes equipment, extend the work-ing life of equipment.
Due to hydrogen sulfate ammonia and ammonium polyphosphate, below 100 DEG C, pH value is 5.2-6.0, and the pH value of wood chip fiber is 7.5-8, the two upon mixing pH value between 6.0-7.In more than 100 DEG C, hydrogen sulfate ammonia can decomposite acidic hydrogen ion, and the existence of formaldehyde can accelerate this reaction, and high temperature and acid-reaction can make ammonium polyphosphate fast decoupled go out more hydrogen ion, and curing reaction is carried out fast.Because sulfuric acid is strong acid, amount conference hinders drying duct and pressing plate, steel band, so be transformed into phosphoric acid to promote that solidification can avoid ageing equipment.Phosphoric acid has shock absorption, and pH value is generally not easy to be reduced to less than 3, and the glued membrane formed like this can be stablized, continuously.Use the hydrogen ion that middle formation is many, urea-formaldehyde glue can be impelled at 10-30 DEG C lower than the hot pressing temperature of background technology, in identical hot pressing time, reach identical solidification effect.
Claims (4)
1. produce a special protective agent for environment-friendly type density board product, it is characterized in that being made up of solidifying agent, sodium-metaphosphate and aluminum potassium sulfate, in curing agent solution, add sodium phosphate and aluminum potassium sulfate, make the special protective agent of production environment-friendly type density board product.
2. a kind of special protective agent producing environment-friendly type density board product according to claim 1, it is characterized in that: the weight adding sodium-metaphosphate and aluminum potassium sulfate in curing agent solution is: the medium-density plate fiberboard producing every cubic metre adds the sodium-metaphosphate of 0.5-2.8kg, adds the aluminum potassium sulfate of 1-3kg simultaneously.
3. produce a method for environment-friendly type density board product, it is characterized in that: comprise following steps:
produce medium-density plate fiberboard, in impregnation process, except adding curing agent solution, also add sodium-metaphosphate and aluminum potassium sulfate;
sodium-metaphosphate and aluminum potassium sulfate add-on are determined by the output of producing medium-density plate fiberboard, and the medium-density plate fiberboard producing every cubic metre adds the sodium-metaphosphate of 0.5-2.8kg, adds the aluminum potassium sulfate of 1-3kg.
4. a kind of method of producing environment-friendly type density board product according to claim 3, add sodium-metaphosphate and aluminum potassium sulfate described in it is characterized in that, feed postition has three kinds:
by the sodium-metaphosphate of solid and aluminum potassium sulfate, disperse in the intermediate rubber tank of density board fiberboard aborning, finish using in one hour;
by the sodium-metaphosphate of solid and aluminum potassium sulfate, be mixed with the mixed aqueous solution of mass ratio 5-15%, add in the slurry pipe of density board fiberboard aborning;
the sodium-metaphosphate of solid and aluminum potassium sulfate are joined in curing agent solution, merges with curing agent solution in density board fiberboard aborning and use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510000436.5A CN104610886B (en) | 2015-01-04 | 2015-01-04 | A kind of method and special antiaging agent for producing environment-friendly type density panel products |
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| CN201510000436.5A CN104610886B (en) | 2015-01-04 | 2015-01-04 | A kind of method and special antiaging agent for producing environment-friendly type density panel products |
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| CN104610886B CN104610886B (en) | 2017-09-05 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4107119A (en) * | 1976-07-26 | 1978-08-15 | Nippon Kasei Chemical Co., Ltd. | Adhesive composition rapidly hardenable at room temperature |
| CN88105729A (en) * | 1988-06-09 | 1988-12-21 | 刘定之 | Veneer adhesive and technology thereof |
| CN1962796A (en) * | 2005-11-07 | 2007-05-16 | 吴志峰 | Non-osmosis ultrathin wood adhesive |
-
2015
- 2015-01-04 CN CN201510000436.5A patent/CN104610886B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4107119A (en) * | 1976-07-26 | 1978-08-15 | Nippon Kasei Chemical Co., Ltd. | Adhesive composition rapidly hardenable at room temperature |
| CN88105729A (en) * | 1988-06-09 | 1988-12-21 | 刘定之 | Veneer adhesive and technology thereof |
| CN1962796A (en) * | 2005-11-07 | 2007-05-16 | 吴志峰 | Non-osmosis ultrathin wood adhesive |
Non-Patent Citations (1)
| Title |
|---|
| 曹阳等: "木素改性脲醛胶粘剂的研制", 《贵州化工》 * |
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