CN105150346A - Durable type high-density fiberboard capable of being used outdoors and preparation method thereof - Google Patents
Durable type high-density fiberboard capable of being used outdoors and preparation method thereof Download PDFInfo
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- CN105150346A CN105150346A CN201510414405.4A CN201510414405A CN105150346A CN 105150346 A CN105150346 A CN 105150346A CN 201510414405 A CN201510414405 A CN 201510414405A CN 105150346 A CN105150346 A CN 105150346A
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Abstract
The invention discloses a durable type high-density fiberboard capable of being used outdoors. The fiberboard is characterized by being prepared from the raw materials including, by weight, 42-45 parts of crop straw, an appropriate amount of sodium hydroxide with the concentration of 2%, 2-2.5 parts of silane coupling agents kh450, 1-2 parts of methoxy polyethylene glycol, 4-6 parts of fiberglass, 66-70 parts of ethanol with the concentration of 95%, 30-32 parts of wood scraps, 7-8 parts of waterborne polyurethane adhesive, 1.5-2 parts of emulsifying paraffin, an appropriate amount of water, 0.8-1 parts of tributylphosphate and 1-1.5 parts of organosilicone emulsion. The fiberboard is a resource substitute product. The composition proportion is simple, scientific and reasonable. Industrialization control over the process is convenient. Compared with the prior art, the method is advantageous in that not only can the production cost be reduced and the production efficiency be improved, but also the quality stability of the fiberboard can be improved; the fiberboard has the water resistance, mildew resistance, damp resistance and aging resistance and is capable of being used outdoors; in addition, the fiberboard is long in service cycle and worth popularization.
Description
Technical field
The present invention relates to wood materials deep process technology field, particularly a kind of can the durable type high density fiberboard and preparation method thereof of outdoor application.
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 can the durable type high density fiberboard and preparation method thereof of outdoor application.The present invention carries out process innovation on the basis of traditional handicraft, first soaking with sodium hydroxide agricultural crop straw is utilized, the wax coat on stalk top layer can be reduced, make the stalk fibre that content of ashes is low, then with process such as silane couplers after being mixed with wood-fibred by stalk fibre, further improve amalgamation, the uniformity of composite fibre, fiber after such process and adhesive, waterproofing agent can be combined closely, not easily layering, steady quality is homogeneous, and intensity is high.
In order to realize object of the present invention, the present invention is by following scheme implementation:
Can the durable type high density fiberboard of outdoor application, 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, methoxy poly (ethylene glycol) 1-2, glass fibre 4-6, concentration are 95%, Aqueous Polyurethane Adhesives 7-8, emulsified wax 1.5-2, water are appropriate, tributyl phosphate 0.8-1, organosilicon breast 1-1.5;
Of the present invention a kind of can the durable type high density fiberboard of outdoor application, 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) glass fibre being pulverized 100 mesh sieves, then to add concentration after 40 minutes with silane coupler kh450 mixing and ball milling be make suspension in the ethanol of 95%, add methoxy poly (ethylene glycol) again, at room temperature stir 30 minutes, then 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 organosilicon breast is mixed with emulsified wax, then add Aqueous Polyurethane Adhesives and all the other residual components, make mixed slurry after stirring 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 makes stalk fibre with alkali treatment agricultural crop straw, wood leftover material is made wood-fibred, then with the composition such as glass fiber powder and silane coupler, surface treatment is carried out to composite fibre, the internal stress on surface can be eliminated, thus improve the adhesion strength of composite fibre, there is after coordinating with adhesive extremely strong resistance to water, viscosity, intensity.
The present invention is by Aqueous Polyurethane Adhesives and the blended process slurry of making such as emulsified wax, organosilicon breast, compositely like this can strengthen waterproof and gumminess, and 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 moisture-proof effect is remarkable, prevents fiberboard cracking, warpage, increases the service life.
The present invention is that substitution of resources product composition proportioning is simply scientific and reasonable, technique is convenient to control of industrialization, compared with prior art, the method can not only reduce production cost, enhance productivity, and fiberboard quality stability can be improved, and water-fast, mildew-resistant, protection against the tide, anti-aging, can with out of doors, and life cycle is long, it is a kind of fiberboard technology of preparing with applications well prospect.
Specific embodiments
Below by instantiation, the present invention is described in detail.
Can the durable type high density fiberboard of outdoor application, 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, methoxy poly (ethylene glycol) 1, glass fibre 4, concentration are 95%, wood leftover material 30, Aqueous Polyurethane Adhesives 7, emulsified wax 1.5, water are appropriate, tributyl phosphate 0.8, organosilicon breast 1;
Of the present invention a kind of can the durable type high density fiberboard of outdoor application, 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) glass fibre being pulverized 100 mesh sieves, then to add concentration after 40 minutes with silane coupler kh450 mixing and ball milling be make suspension in the ethanol of 95%, add methoxy poly (ethylene glycol) again, at room temperature stir 30 minutes, then 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 organosilicon breast is mixed with emulsified wax, then add Aqueous Polyurethane Adhesives and all the other residual components, make mixed slurry after stirring 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 0.90g/cm
3, MOR is 36.87MPa, and internal bond strength is 0.881MPa, and elastic modelling quantity is 3358MPa, and thickness swelling rate is 12%, and burst size of methanal reaches E0 level environmental protection standard.
Claims (2)
1. one kind can the durable type high density fiberboard of outdoor application, 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, methoxy poly (ethylene glycol) 1-2, glass fibre 4-6, concentration are 95%, Aqueous Polyurethane Adhesives 7-8, emulsified wax 1.5-2, water are appropriate, tributyl phosphate 0.8-1, organosilicon breast 1-1.5.
2. a kind of according to claim 1 can the durable type high density fiberboard of outdoor application, it 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) glass fibre being pulverized 100 mesh sieves, then to add concentration after 40 minutes with silane coupler kh450 mixing and ball milling be make suspension in the ethanol of 95%, add methoxy poly (ethylene glycol) again, at room temperature stir 30 minutes, then 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 organosilicon breast is mixed with emulsified wax, then add Aqueous Polyurethane Adhesives and all the other residual components, make mixed slurry after stirring 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042133A (en) * | 2016-05-23 | 2016-10-26 | 宁波中加低碳新技术研究院有限公司 | Manufacturing method for outdoor floor tiles, floors and exterior wall cladding panels |
| CN106476111A (en) * | 2016-12-17 | 2017-03-08 | 李洪中 | A kind of preparation method of fiber reinforcement stalk Scrimber |
| CN108587211B (en) * | 2018-05-09 | 2020-11-27 | 芜湖市创源新材料有限公司 | Preparation method of straw glass fiber composite fiberboard |
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| JPH06262727A (en) * | 1993-03-12 | 1994-09-20 | Dainippon Printing Co Ltd | Plywood substituting panel and preparation thereof |
| CN101349028A (en) * | 2008-08-05 | 2009-01-21 | 广东省造纸研究所 | Improved fruit-nourishing sleeve bag paper coating preparation |
| EP2111959A2 (en) * | 2008-04-24 | 2009-10-28 | Kronotec Ag | Method for producing wooden materials and wooden materials |
| CN102532965A (en) * | 2010-12-08 | 2012-07-04 | 魏保利 | Coating composition and decorative material |
| CN102559031A (en) * | 2011-12-30 | 2012-07-11 | 江苏创基新材料有限公司 | Organosilicon-modified aqueous polyurethane-acrylate composite coating agent and preparation method thereof |
| CN104479385A (en) * | 2014-11-18 | 2015-04-01 | 江苏大学 | Preparation method of reinforced straw fiber composite material |
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2015
- 2015-07-15 CN CN201510414405.4A patent/CN105150346A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06262727A (en) * | 1993-03-12 | 1994-09-20 | Dainippon Printing Co Ltd | Plywood substituting panel and preparation thereof |
| EP2111959A2 (en) * | 2008-04-24 | 2009-10-28 | Kronotec Ag | Method for producing wooden materials and wooden materials |
| CN101349028A (en) * | 2008-08-05 | 2009-01-21 | 广东省造纸研究所 | Improved fruit-nourishing sleeve bag paper coating preparation |
| CN102532965A (en) * | 2010-12-08 | 2012-07-04 | 魏保利 | Coating composition and decorative material |
| CN102559031A (en) * | 2011-12-30 | 2012-07-11 | 江苏创基新材料有限公司 | Organosilicon-modified aqueous polyurethane-acrylate composite coating agent and preparation method thereof |
| CN104479385A (en) * | 2014-11-18 | 2015-04-01 | 江苏大学 | Preparation method of reinforced straw fiber composite material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042133A (en) * | 2016-05-23 | 2016-10-26 | 宁波中加低碳新技术研究院有限公司 | Manufacturing method for outdoor floor tiles, floors and exterior wall cladding panels |
| CN106476111A (en) * | 2016-12-17 | 2017-03-08 | 李洪中 | A kind of preparation method of fiber reinforcement stalk Scrimber |
| CN108587211B (en) * | 2018-05-09 | 2020-11-27 | 芜湖市创源新材料有限公司 | Preparation method of straw glass fiber composite fiberboard |
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Application publication date: 20151216 |