CN105128121A - Multi-purpose fireproof high-density composite fiberboard and preparation method thereof - Google Patents
Multi-purpose fireproof high-density composite fiberboard and preparation method thereof Download PDFInfo
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- CN105128121A CN105128121A CN201510414415.8A CN201510414415A CN105128121A CN 105128121 A CN105128121 A CN 105128121A CN 201510414415 A CN201510414415 A CN 201510414415A CN 105128121 A CN105128121 A CN 105128121A
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Abstract
The invention discloses a multi-purpose fireproof high-density composite fiberboard. The multi-purpose fireproof high-density composite fiberboard is characterized by being prepared from, by weight, 42-45 parts of crop straw, an appropriate amount of sodium hydroxide with the concentration of 2%, 2-2.5 parts of a silane coupling agent kh450, 5-7 parts of vermiculite, 2-3 parts of floor gypsum powder, 66-70 parts of ethyl alcohol with the concentration of 95%, 30-32 parts of timber leftover materials, 7-8 parts of waterborne polyurethane adhesives, 1.5-2 parts of emulsified paraffin, an appropriate amount of water, 0.5-0.7 part of OP-10 and 1-2 parts of melamine phosphate. Raw materials of the multi-purpose fireproof high-density composite fiberboard can be easily obtained, the process is innovative and capable of being industrially controlled conveniently, and therefore the product can has good waterproof and fireproof performance, is high in fold-resistant tenacity, can completely replace wood plates, plastic plates and the like, can be widely used for the industries of automotive trim linings, process packages, electric appliances, furniture and the like, and is wide in application range and good in market prospect.
Description
Technical field
The present invention relates to wood materials deep process technology field, particularly a kind of multiduty fire-type high density composite fiberboard and preparation method thereof.
Background technology
In recent years, the development of China middle and higher density fiberboard industry is very fast, hardboard originally progressively replace by medium and high density fibre panel.MDF enterprise is very large to the dependence of wood raw material, and wood raw material cost accounts for about 45% of production cost, the wood raw material production having badly influenced fiberboard in short supply.With regard to the requirement that medium and high density fibre panel is produced, be more than 10 years, the regeneration period of bamboo is also at 3-5, and the regeneration period of agricultural crop straw is 1 year or less than 1 year, from the utilization ratio of resource, the stalk of crops was the most favourable.China is large agricultural country, have abundant agricultural straw resource, but at present the utilization rate of China's stalk resource is only 33%, all the other most of stalks are fallen as castoff burning or only as fuel, not only cause the waste of natural resources, and weighting ring environment pollution.Adopt the cheap agronomic crop fibre strong with recyclability to replace wood raw material, become a direction of middle and higher density fiberboard development gradually.But the herbaceous plant fiber taking crops as representative is then short and thin, limits the mechanical strength of turf fibre plate to a certain extent.The content of herbaceous plant stem stalk organic solvent extract is obviously lower than wood raw material, but main component is wax, accompany by a small amount of higher fatty acids, higher alcohol etc., add that grass cane, epidermal leaf cells silicidize degree are very high, wax coat and the dioxide-containing silica on stalk surface are high, be unfavorable for the infiltration of adhesive, result in the gummed of traditional Lauxite to crushed straw aggregate bad.When this just requires to utilize the herbaceous plant fibers such as agricultural crop straw to manufacture high density fiberboard, the traditional adhesive existed in existing technique must be solved and glue together bad, poor water resistance, intensity difference defect.
It is formaldehyde series glue three kinds of Typical Representatives that phenolic resins, Lauxite and melamine resin adehsive stick agent, uses the most distinct issues of three-aldehyde glue to be free formaldehyde release.Three-aldehyde glue series wood-based plate constantly can discharge free formaldehyde, serious harm health in 3-15 before production and products thereof uses.Both at home and abroad the demand of the wood-based panel products such as no-formaldehyde density board is grown to even greater heights.Find in production practices, Aqueous Polyurethane Adhesives etc. do not arise at the historic moment containing the adhesive of formaldehyde, and occupation rate of market is more and more higher, but because price is higher, utilize it will inevitably bring the increase of the production cost of density fiber board as adhesive, but a part of composition can be saved under the prerequisite adopting the raw material such as agricultural crop straw, wood leftover material, so both can not cause the increase of cost, also the product of safety and environmental protection in producing, is worth commercially promoting.
Along with the development of high density fiberboard, be only the demand that intensity, resistance to water have not reached market development far away, this just requires the sheet material constantly developing various performance, to meet the demand in market.
Summary of the invention
The object of this invention is to provide a kind of multiduty fire-type high density composite fiberboard and preparation method thereof.Fire proofing material and silane coupler etc. are composite carries out modification to fiber for the present invention's vermiculites etc., more just melamine phosphate flame-retardant additive adds in Aqueous Polyurethane Adhesives blended to composite fibre applying glue, and flameproof effect strengthens.
In order to realize object of the present invention, the present invention is by following scheme implementation:
A kind of multiduty fire-type high density composite fiberboard, be made up of the raw material of following weight portion: ethanol 66-70, wood leftover material 30-32 that the Sodium hydroxide q. s that agricultural crop straw 42-45, concentration are 2%, silane coupler kh4502-2.5, vermiculite 5-7, floor gypsum powder 2-3, concentration are 95%, Aqueous Polyurethane Adhesives 7-8, emulsified wax 1.5-2, water in right amount, OP-100.5-0.7, melamine phosphate 1-2;
One of the present invention multiduty fire-type high density composite fiberboard, be made up of following concrete steps:
(1) putting into baking oven after being cleaned by agricultural crop straw, to be dried to water content be 20%-30%, cold go after be cut into the segment of 3-4 centimetre, then the concentration adding 3 times amount is the NaOH of 2%, filter after stirring 2-3 hour with the speed of 60 revs/min, get filter residue and be washed to neutrality, obtain crop branch fiber;
(2) wood leftover material is sent in wood chipper be cut into irregular spile, under 155-165 DEG C of condition, with saturated vapor (pressure is 0.75MPa), boiling is carried out to wood chip, send in defibrator after wood chip is softening, at the same temperature, under the mixing speed effect of 1200-1400 rev/min, wear into wood-fibred, the crop branch fiber obtained with step (1) is mixed to get composite fibre;
(3) vermiculite power was broken to 200 mesh sieves to mix with floor gypsum powder, then add in the water of total amount 2 times amount, silane coupler kh450 is added after stirring, ball milling to add concentration after 40 minutes be the ethanol of 95%, stir under normal temperature after forming suspension and composite fibre is soaked wherein, pull out after 20-30 minute, put in an oven after drying, dry 30 minutes under the condition of 85-95 DEG C, take out the composite fibre obtaining surface modification after it cools naturally;
(4) first by Aqueous Polyurethane Adhesives and melamine phosphate mixed grinding 20 minutes, then add emulsified wax and all the other residual components, make mixed slurry after stirring under normal temperature stand-by; The composite fibre of surface modification step (3) obtained adds the mixed slurry of half amount after mixing agitator is by fabric thrashing, stir, then the material after mixing thoroughly is sent in spray mixer, continue to spray into second half mixed slurry, obtain the composite fibre before hot pressing;
(5) composite fibre before hot pressing is mated formation equably in the slab meeting technological requirement, control the thickness of fiberboard, first precompressed on vulcanizing press, then through continuous rolling precompressed, obtain preformed slab, again preformed slab is sent into hot press and carry out that hot-forming (control hot pressing temperature is 180-210 DEG C, and briquetting pressure is 40kg/cm
2, the dwell time is 3-4 minute) namely obtain product of the present invention.
The invention has the beneficial effects as follows: first the present invention utilizes soaking with sodium hydroxide agricultural crop straw, the wax coat on stalk top layer can be reduced, make the stalk fibre that content of ashes is low, with pulverizing the composite post processing such as vermiculite, silane coupler after being mixed with wood-fibred by stalk fibre again, improve amalgamation, fire-type, the uniformity of composite fibre; Aqueous Polyurethane Adhesives and melamine phosphate grind afterwards by the present invention and emulsified wax is blended makes process slurry, a part is blended with composite fibre, a part is sprayed on composite fibre surface, such treatment process can make process slurry well penetrate between fiber and fiber, waterproof and dampproof flameproof effect is remarkable, prevent fiberboard cracking, warpage, increase the service life.
Raw material of the present invention is simple and easy to get, process innovation and be convenient to Industry Control, this product is made to have good water proofing property, fire-type, folding good toughness, plank, plastic plate etc. can be substituted completely, can be widely used in the industries such as automotive trim liner, technique packaging, electrical equipment, furniture, of many uses, market prospects are good.
Specific embodiments
Below by instantiation, the present invention is described in detail.
A kind of multiduty fire-type high density composite fiberboard, be made up of the raw material of following weight portion (kilogram): the ethanol 66 that the Sodium hydroxide q. s that agricultural crop straw 42, concentration are 2%, silane coupler kh4502, vermiculite 5, floor gypsum powder 2, concentration are 95%, wood leftover material 30, Aqueous Polyurethane Adhesives 7, emulsified wax 1.5, water in right amount, OP-100.5, melamine phosphate 1;
One of the present invention multiduty fire-type high density composite fiberboard, be made up of following concrete steps:
(1) putting into baking oven after being cleaned by agricultural crop straw, to be dried to water content be 20%-30%, cold go after be cut into the segment of 3-4 centimetre, then the concentration adding 3 times amount is the NaOH of 2%, filter after stirring 2 hours with the speed of 60 revs/min, get filter residue and be washed to neutrality, obtain crop branch fiber;
(2) wood leftover material is sent in wood chipper be cut into irregular spile, under 155-165 DEG C of condition, with saturated vapor (pressure is 0.75MPa), boiling is carried out to wood chip, send in defibrator after wood chip is softening, at the same temperature, under the mixing speed effect of 1200 revs/min, wear into wood-fibred, the crop branch fiber obtained with step (1) is mixed to get composite fibre;
(3) vermiculite power was broken to 200 mesh sieves to mix with floor gypsum powder, then add in the water of total amount 2 times amount, silane coupler kh450 is added after stirring, ball milling to add concentration after 40 minutes be the ethanol of 95%, stir under normal temperature after forming suspension and composite fibre is soaked wherein, pull out after 20 minutes, put in an oven after drying, dry 30 minutes under the condition of 85-95 DEG C, take out the composite fibre obtaining surface modification after it cools naturally;
(4) first by Aqueous Polyurethane Adhesives and melamine phosphate mixed grinding 20 minutes, then add emulsified wax and all the other residual components, make mixed slurry after stirring under normal temperature stand-by; The composite fibre of surface modification step (3) obtained adds the mixed slurry of half amount after mixing agitator is by fabric thrashing, stir, then the material after mixing thoroughly is sent in spray mixer, continue to spray into second half mixed slurry, obtain the composite fibre before hot pressing;
(5) composite fibre before hot pressing is mated formation equably in the slab meeting technological requirement, control the thickness of fiberboard, first precompressed on vulcanizing press, then through continuous rolling precompressed, obtain preformed slab, again preformed slab is sent into hot press and carry out that hot-forming (control hot pressing temperature is 180-210 DEG C, and briquetting pressure is 40kg/cm
2, the dwell time is 3-4 minute) namely obtain product of the present invention.
Thickness of the present invention is 12mm, the product after hot pressing cools at normal temperatures, saw and cut, deposit 2 days after, after testing, the performance test results of product of the present invention meets: density is 0.880g/cm
3, MOR is 36.59MPa, and internal bond strength is 0.858MPa, and elastic modelling quantity is 3328MPa, and thickness swelling rate is 10.8%, and burst size of methanal reaches E0 level environmental protection standard.
Claims (2)
1. a multiduty fire-type high density composite fiberboard, it is characterized in that, be made up of the raw material of following weight portion: ethanol 66-70, wood leftover material 30-32 that the Sodium hydroxide q. s that agricultural crop straw 42-45, concentration are 2%, silane coupler kh4502-2.5, vermiculite 5-7, floor gypsum powder 2-3, concentration are 95%, Aqueous Polyurethane Adhesives 7-8, emulsified wax 1.5-2, water are appropriate, OP-100.5-0.7, melamine phosphate 1-2.
2. a kind of multiduty fire-type high density composite fiberboard according to claim 1, is characterized in that, be made up of following concrete steps:
(1) putting into baking oven after being cleaned by agricultural crop straw, to be dried to water content be 20%-30%, cold go after be cut into the segment of 3-4 centimetre, then the concentration adding 3 times amount is the NaOH of 2%, filter after stirring 2-3 hour with the speed of 60 revs/min, get filter residue and be washed to neutrality, obtain crop branch fiber;
(2) wood leftover material is sent in wood chipper be cut into irregular spile, under 155-165 DEG C of condition, with saturated vapor (pressure is 0.75MPa), boiling is carried out to wood chip, send in defibrator after wood chip is softening, at the same temperature, under the mixing speed effect of 1200-1400 rev/min, wear into wood-fibred, the crop branch fiber obtained with step (1) is mixed to get composite fibre;
(3) vermiculite power was broken to 200 mesh sieves to mix with floor gypsum powder, then add in the water of total amount 2 times amount, silane coupler kh450 is added after stirring, ball milling to add concentration after 40 minutes be the ethanol of 95%, stir under normal temperature after forming suspension and composite fibre is soaked wherein, pull out after 20-30 minute, put in an oven after drying, dry 30 minutes under the condition of 85-95 DEG C, take out the composite fibre obtaining surface modification after it cools naturally;
(4) first by Aqueous Polyurethane Adhesives and melamine phosphate mixed grinding 20 minutes, then add emulsified wax and all the other residual components, make mixed slurry after stirring under normal temperature stand-by; The composite fibre of surface modification step (3) obtained adds the mixed slurry of half amount after mixing agitator is by fabric thrashing, stir, then the material after mixing thoroughly is sent in spray mixer, continue to spray into second half mixed slurry, obtain the composite fibre before hot pressing;
(5) composite fibre before hot pressing is mated formation equably in the slab meeting technological requirement, control the thickness of fiberboard, first precompressed on vulcanizing press, then through continuous rolling precompressed, obtain preformed slab, again preformed slab is sent into hot press and carry out that hot-forming (control hot pressing temperature is 180-210 DEG C, and briquetting pressure is 40kg/cm
2, the dwell time is 3-4 minute) namely obtain product of the present invention.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105884315A (en) * | 2016-04-18 | 2016-08-24 | 杭州富阳高博信息技术服务有限公司 | High-strength floor material and application thereof |
CN108724424A (en) * | 2016-09-22 | 2018-11-02 | 长泰惠龙新材料科技有限公司 | A kind of mould proof composite fiber plate of environment-friendly type antibiotic and preparation method thereof |
CN108789757A (en) * | 2018-06-28 | 2018-11-13 | 广东皇田环保科技有限公司 | The manufacture craft of high-density solid wood particle plank |
CN109679212A (en) * | 2018-12-27 | 2019-04-26 | 中国科学院宁波材料技术与工程研究所 | A kind of plant fiber fire resistant fluid and the preparation method and application thereof |
CN115959877A (en) * | 2022-12-12 | 2023-04-14 | 泰山石膏(江阴)有限公司 | High-flame-retardant gypsum-based fiberboard and preparation method thereof |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105884315A (en) * | 2016-04-18 | 2016-08-24 | 杭州富阳高博信息技术服务有限公司 | High-strength floor material and application thereof |
CN105884315B (en) * | 2016-04-18 | 2018-10-12 | 杭州富阳高博信息技术服务有限公司 | A kind of high strength flooring and its application |
CN108724424A (en) * | 2016-09-22 | 2018-11-02 | 长泰惠龙新材料科技有限公司 | A kind of mould proof composite fiber plate of environment-friendly type antibiotic and preparation method thereof |
CN108789757A (en) * | 2018-06-28 | 2018-11-13 | 广东皇田环保科技有限公司 | The manufacture craft of high-density solid wood particle plank |
CN109679212A (en) * | 2018-12-27 | 2019-04-26 | 中国科学院宁波材料技术与工程研究所 | A kind of plant fiber fire resistant fluid and the preparation method and application thereof |
CN115959877A (en) * | 2022-12-12 | 2023-04-14 | 泰山石膏(江阴)有限公司 | High-flame-retardant gypsum-based fiberboard and preparation method thereof |
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