CN103029196B - Method for manufacturing rubber-free high-density fiberboard - Google Patents
Method for manufacturing rubber-free high-density fiberboard Download PDFInfo
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- CN103029196B CN103029196B CN201210541382.XA CN201210541382A CN103029196B CN 103029196 B CN103029196 B CN 103029196B CN 201210541382 A CN201210541382 A CN 201210541382A CN 103029196 B CN103029196 B CN 103029196B
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- density fiberboard
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- high density
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Abstract
The invention discloses a method for manufacturing a rubber-free high-density fiberboard. According to the method, the cross-sectional dimension and length dimension of a wood fiber are controlled, i.e., the thickness of the wood fiber is 3-10mu.m, the width of the wood fiber is 10-50mu.m, and the length of the wood fiber is 0.3-10mm; then working procedures such as drying, paving, prepressing and thermocompression are performed, so that the rubber-free high-density fiberboard is manufactured. Practices prove that the finer wood fiber with the cross section of a micron dimension is adopted as a raw material and is thermally compressed to obtain the rubber-free fiberboard with high density and high thickness, so that the process restriction bottleneck of batch production for rubber-free fiberboards is broken through, the application field of the rubber-free fiberboard is greatly expanded, and the rubber-free high-density fiberboard is especially applicable to the field of furniture and can be used for realizing low-cost, environmentally-friendly and high-grade furniture.
Description
Technical field
The invention belongs to wood materials deep process technology field, relate in particular to a kind of preparation method of the glue-free high density fiberboard with high density, high thickness.
Background technology
Wood-fibred is to adopt to cut down surplus small diameter grade brush wood, wood machining residues or other non-lignocellulose plant fibre raw materials, through peeling, chip, screening and cleaning treatment, last defibrator process solution fibre makes.
At present, wood-fibred only limits to produce medium density fibre board (MDF) in application, the harm that production period produces, the harmful substance such as formaldehyde, phenol discharging as adhesive more and more receives people's concern, especially from 2008 the California, USA air resource committee on April 18, (CARB) issued after the noxious material air borne control measure that reduce Wood composite products formaldehyde emissions, regulation does not meet the Wood composite products of CARB certification and the finished product that contains Wood composite products all can not enter American market.Therefore, in production process, do not use adhesive and make that to obtain without adhesive wood fiber part be one of hot subject of studying of scientific worker always.
Publication number is that the Chinese patent application of CN85105958A discloses a kind of method of producing synthetic with lignocellulosic materials, the method is by lignocellulosic steam heating processing, make hemicellulose degraded and hydrolysis in lignocellulosic materials become the materials such as free sugar class, change cementing agent and filler into through heat cure again, make to make the lignin fiber composite obtaining and there is superior strength and size.
Publication number is that the Chinese patent application of CN1063298A discloses a kind of method of being produced heat reactive resin and composite product by ligno-ccllulose, first the method makes half fiber generation thermal decomposition and hydrolysis generate water-soluble substances with high steam processing lignocellulosic material, then under hot pressing, generates a kind of waterproof adhesive bond using these water-soluble substanceses as a kind of heat reactive resin adhesive and generates composite product.
Publication number is CN102039623A, it is 3MPa～12MPa that moulding wood-fibred is pressed in to pressure in advance at base substrate, temperature is 150 DEG C～170 DEG C, temperature retention time is to be hot pressed into molding blank under the condition of 30min～120min, then send into and in retort, carry out conventional charing processing, carbonization temperature is 180 DEG C～230 DEG C, and carbonization time is 30min～150min.
But the non-glue fibre board that said method makes is limited to small breadth laboratory test, not yet form the ripe production technology of large format, still cannot be applied to actual production.
Publication number is the production method that the Chinese patent application of CN1108988A discloses the glue-free hardboard of a kind of dry method, the method by plant material through separate, dry, do not adding the condition compacted under of cementing agent, hot pressing, in hot pressing, adopt the heat pressing process of three sections of pressurizations, high pressure is 3.4MPa～6.4MPa, low pressure is 0.5MPa～2.0MPa, hot pressing temperature is 180 DEG C～210 DEG C, hot pressing time is high-pressure closing 10s～90s, exhaust 30s～240s, mould and close 30s～240s, thereby make the glue-free hardboard that physical and mechanical property exceedes hardboard national standard seconds.But the maximum nominal thickness size of this glue-free hardboard is no more than 6mm, still lower, has limited the practical application of this glue-free hardboard, can not meet the application of high thickness demand.
Therefore, break through the technical limitations bottleneck of existing non-glue fibre board, producing simply and easily low cost, high performance non-glue fibre board mass and put into production, is current numerous scientific workers' study hotspot, will greatly expand the application of non-glue fibre board.
Summary of the invention
Technical purpose of the present invention is the problem that technique is immature, thickness is low existing for above-mentioned non-glue fibre board, and a kind of preparation method of glue-free high density fiberboard is provided, and can be made and be obtained low cost, high performance wood-fiber board by the method.
The present invention realizes the technical scheme that above-mentioned technical purpose adopts: a kind of preparation method of glue-free high density fiberboard, and taking wood-fibred as raw material, that production process comprises is dry, mat formation, precompressed, hot-forming; It is characterized in that: this wood fiber raw material adopts the wood-fibred that cross section is micron dimension, and its thickness is 3 μ m～10 μ m, and width is 10 μ m～50 μ m, and length is 0.3mm～10mm.
As preferably, the pH value of described wood fiber raw material is 4.2～6.8.
As preferably, described wood fiber raw material self contains or adds the above wood powder of 120 order, and wood fiber raw material and wood powder mass ratio are preferably 9.5:0.5～5:5, more preferably 9:1～6:4.
As preferably, in described dry treatment process, preferably control the moisture content of wood fiber raw material 4%～6%;
As preferably, in described hot-briquetting modeling process, hot pressing temperature is preferably 180 DEG C～220 DEG C, and hot pressing pressure is preferably 40kg/cm
2～75kg/cm
2, hot pressing time is preferably 12min～30min.
Thickness range 12mm～the 35mm that utilizes the glue-free wood-fiber board that said method makes, density can reach 0.85g/cm
3～1.20g/cm
3.
In sum, the inventor finds after by a large amount of experimental exploring, when the cross sectional dimensions of wood fiber raw material reaches micron dimension, length dimension reaches a millimeter magnitude, adopt when the wood-fibred of " very thin " is raw material more, the density of the non-glue fibre board obtaining by being dried, mating formation, after precompressed, the operation such as hot-forming increases substantially, and reaches 0.85g/cm
3～1.20g/cm
3, thickness 12mm～35mm.Trace it to its cause and may be: when the cross sectional dimensions of wood fiber raw material reaches micron dimension, wood fiber raw material is more when " very thin ", stronger to the destruction of wood cell, give that wood-fibred is hot-forming brings following two aspect beneficial effects:
(1) not only increased wood-fibred surface area, and the natural materials with glueability are exposed to surface more, this will be conducive in follow-up hot pressing, because cellulose, hemicellulose and lignin generation physical-chemical reaction in HTHP effect wood-fibred produce more gunk-squeeze process, wood-fibred to be combined;
(2) in defibrator process and hot pressing, the cellulose in wood-fibred, more facile hydrolysis generation Furnan products of hemicellulose part, thus more promote this Furnan products and the lignin with phenolic structure to be formed with adhesivity compound;
Therefore, in the time that wood fiber raw material adopts cross sectional dimensions provided by the invention to be the wood fiber raw material of micron dimension, can make glue-free high density fiberboard, thereby break through the process technology limit bottleneck of existing non-glue fibre board mass production, greatly expand the application of non-glue fibre board, be particularly useful for field of furniture, can realize the high-end furniture of low cost, environmental protection.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, it is pointed out that the following stated embodiment is intended to be convenient to the understanding of the present invention, and it is not played to any restriction effect.
Embodiment 1:
The present embodiment is used for making the glue-free high density fiberboard of plane, and its book size is 2440mm × 1220mm, and thickness is 35mm.
Adopt the hot grinding wood fiber that cross section is micron dimension to mix as raw material with wood powders more than 120 orders.This hot grinding wood fiber thickness is 3 μ m～10 μ m, and width is 10 μ m～50 μ m, and length is 0.3mm～10mm.Control the mass ratio 7:3 of wood-fibred and the above wood powder of 120 order, raw material pH value 6.1.Below concrete making step:
Step 1, drying process:
Take above-mentioned hot grinding wood fiber 73.5kg, the about 31.5kg of the above wood powder of 120 order, utilizes pneumatic conveying dryer to be dried processing, controls its moisture content 4%～6%;
Step 2, paving process:
Dried raw material is through the cyclone separator machinery dolly of mating formation that tiled, and carries out uniform spreading dress;
Step 3, pre-pressing process:
After being mated formation by plate blank conveyer, fiber transport, to preformer, by the qualified slab of mating formation, obtains preformed slab through precompressed;
Step 4, heat pressing process:
By loading cart, slab after treatment step 3 is pushed to hot press, 200 DEG C～210 DEG C of hot pressing temperatures, hot pressing pressure 70kg/cm
2, hot pressing time 25min, obtains glue-free high density fiberboard.
The physical and mechanical property of the glue-free high density fiberboard that above-mentioned making is obtained is tested, and its test result is as follows:
Density: 0.98g/cm
3
MOR MOR//: 54.35MPa
Elastic modelling quantity MOE//: 5931.52MPa
Hold screw power: 1792.2N
24 hours water absorption rates: 12.95%
Above-mentioned test result shows that this glue-free high density fiberboard meets the regulation of national medium density fibre board (MDF) GB/T11718-2009, compared with existing medium density fibre board (MDF), has excellent elastic modelling quantity and MOR.
Above-described embodiment has been described in detail technical scheme of the present invention; be understood that and the foregoing is only specific embodiments of the invention; be not limited to the present invention; all any amendments of making within the scope of principle of the present invention, supplement or similar fashion substitute etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a preparation method for glue-free high density fiberboard, taking wood-fibred as raw material, that production process comprises is dry, mat formation, precompressed, hot-forming; It is characterized in that: it is micron-sized wood-fibred that described wood fiber raw material adopts cross section, and its thickness is 3 μ m～10 μ m, and width is 10 μ m～50 μ m, and length is 0.3mm～10mm.
2. the preparation method of glue-free high density fiberboard according to claim 1, is characterized in that: the pH value of described wood fiber raw material is 4.2～6.8.
3. the preparation method of glue-free high density fiberboard according to claim 1, is characterized in that: in described wood fiber raw material, self contain or add the above wood powder of 120 order, wood fiber raw material and wood powder mass ratio are 9.5:0.5～5:5.
4. the preparation method of glue-free high density fiberboard according to claim 3, is characterized in that: described wood fiber raw material and wood powder mass ratio are 9:1～6:4.
5. the preparation method of glue-free high density fiberboard according to claim 1, is characterized in that: in described dry treatment process, control the moisture content of wood fiber raw material 4%～6%.
6. the preparation method of glue-free high density fiberboard according to claim 1, is characterized in that: in described hot-briquetting modeling process, hot pressing temperature is 180 DEG C～220 DEG C, and hot pressing pressure is 40kg/cm
2～75kg/cm
2.
7. the preparation method of glue-free high density fiberboard according to claim 1, is characterized in that: in described hot-briquetting modeling process, hot pressing time is 12min～30min.
8. according to the preparation method of the glue-free high density fiberboard described in arbitrary claim in claim 1 to 7, it is characterized in that: the thickness of the glue-free high density fiberboard making is 12mm～35mm.
9. according to the preparation method of the glue-free high density fiberboard described in arbitrary claim in claim 1 to 7, it is characterized in that: the density of the glue-free high density fiberboard making is 0.85g/cm
3～1.20g/cm
3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210541382.XA CN103029196B (en) | 2012-12-13 | 2012-12-13 | Method for manufacturing rubber-free high-density fiberboard |
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| CN201210541382.XA CN103029196B (en) | 2012-12-13 | 2012-12-13 | Method for manufacturing rubber-free high-density fiberboard |
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| CN103029196B true CN103029196B (en) | 2014-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106738183A (en) * | 2016-12-31 | 2017-05-31 | 德清华梦木制品有限公司 | A kind of high density fiberboard and preparation method |
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|---|---|---|---|---|
| CN103722604A (en) * | 2014-01-10 | 2014-04-16 | 宁波大世界家具研发有限公司 | Method for manufacturing bamboo fiber non-glued door plank |
| CN103878858A (en) * | 2014-03-04 | 2014-06-25 | 中国科学院宁波材料技术与工程研究所 | Method for manufacturing formaldehyde-free bamboo and wood fiberboard |
| CN103950084B (en) * | 2014-04-28 | 2016-03-30 | 复旦大学 | Microwave sizing stalk manufactures the method for environmental protection wood materials |
| CN104552548B (en) * | 2014-12-25 | 2017-03-22 | 浙江新木材料科技有限公司 | Equal-pressure forming method of wood fiber molded special-shaped parts |
| CN105178560A (en) * | 2015-08-06 | 2015-12-23 | 惠州市东江园林工程有限公司 | Corrosion-resistance ecological floor and preparation method thereof |
| CN111745771B (en) * | 2020-07-04 | 2021-10-08 | 南京林业大学 | Method for preparing non-glue shaving board by waste heat-treated wood |
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| JPH09314524A (en) * | 1996-05-29 | 1997-12-09 | Kanegafuchi Chem Ind Co Ltd | Fiber board and its manufacture |
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| CN101462289A (en) * | 2008-12-30 | 2009-06-24 | 南京林业大学 | Method for adhering lumber without glue |
| CN102248572A (en) * | 2011-07-19 | 2011-11-23 | 中南林业科技大学 | Method for manufacturing high-strength environmentally-friendly binderless particle board |
| CN102528890A (en) * | 2011-12-12 | 2012-07-04 | 宁波大世界家具研发有限公司 | Manufacturing method for non-adhesive wood fiber part |
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2012
- 2012-12-13 CN CN201210541382.XA patent/CN103029196B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09314524A (en) * | 1996-05-29 | 1997-12-09 | Kanegafuchi Chem Ind Co Ltd | Fiber board and its manufacture |
| CA2264675A1 (en) * | 1996-06-27 | 1998-01-08 | Robert N. Clausi | Method of molding powdered plant fiber into high density materials |
| CN1590051A (en) * | 2003-08-25 | 2005-03-09 | 华东理工大学 | Processing method of bamboo carbon ultrafine powder and its application in synthetic fiber |
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| CN101462289A (en) * | 2008-12-30 | 2009-06-24 | 南京林业大学 | Method for adhering lumber without glue |
| CN102248572A (en) * | 2011-07-19 | 2011-11-23 | 中南林业科技大学 | Method for manufacturing high-strength environmentally-friendly binderless particle board |
| CN102528890A (en) * | 2011-12-12 | 2012-07-04 | 宁波大世界家具研发有限公司 | Manufacturing method for non-adhesive wood fiber part |
Cited By (1)
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