CN101108503A - Flame retardant medium density fiberboard and manufacturing method therefor - Google Patents
Flame retardant medium density fiberboard and manufacturing method therefor Download PDFInfo
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- CN101108503A CN101108503A CNA2007100297732A CN200710029773A CN101108503A CN 101108503 A CN101108503 A CN 101108503A CN A2007100297732 A CNA2007100297732 A CN A2007100297732A CN 200710029773 A CN200710029773 A CN 200710029773A CN 101108503 A CN101108503 A CN 101108503A
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Abstract
The invention relates to a medium-density fiber board with fire resistance. The fiber board comprises wood fiber, binder and fire resistant material, wherein, the fire resistance material is swelled vermiculite particles, the added volume of which is 20-80% of the weight of the absolutely dry fiber material, and the added volume of the binder is 15-20% of the weight of the absolutely dry fiber material. Vermiculite powder can also be added in the fire resistant material. The method for producing the medium density fiber board comprises the following steps: the wooden material is sliced; the crushed materials are dissolved into fiber wood pulp by boiling and hot grinding in a defibrator; the fiber wood pulp is applied and mixed with the binder; the fiber wood pulp is dried in a fiber drying tube; a pre-press is adopted to prepress the fiber wood pulp into board blank after laying on a laying machine; the board blank is hot pressed into a blank board; medium density fiber board is formed by edge sawing and sanding the blank board. Before the wooden fiber enters the laying step, swelled vermiculite particles or swelled vermiculite particles and vermiculite powder fire resistant material. The flame retardant medium density fiber board produced by the formula and the method is light, has little environment pollution and low production cost.
Description
Technical field
The invention belongs to medium density fibre board (MDF) manufacturing technology field, relate in particular to a kind of medium density fibre board (MDF) and manufacture method thereof with flame-retarding characteristic.
Background technology
At present common medium density fibre board (MDF) is manufactured, its raw material mainly is made up of lignocellulosic material and adhesive, the overwhelming majority belongs to organic material, has inflammable character, therefore present common medium density fiber panel products does not generally have flame-retarding characteristic, according to the criterion of GB8624-1997, generally belong to B3 level (being inflammable level).As everyone knows, country more and more payes attention to security against fire in recent years, and constantly on the technical standard to finishing and furniture materials, especially public work, the fire resistance as finishings such as hotel, cinema and furniture material proposes more and more higher requirement, and be Compulsory Feature, the fire resistance of existing common medium density fibre board (MDF) has not reached requirement, as the main application of medium density fibre board (MDF)---and finishing and furniture woods also just are greatly limited.How manufacturing the medium density fibre board (MDF) with flame-retarding characteristic, is the problem that the producer need solve.
Produce burning-resistant medium density fibreboard at present many technological approaches are arranged, its major technique is common finished product medium density fibre board (MDF) to be immersed in the fire retardant or with liquid combustion inhibitor be sprayed on the finished product medium density fibre board (MDF), drying vapors away the solvent of fire retardant, promptly produces burning-resistant medium density fibreboard.Plank by this method production, though have flame-retarding characteristic, but also there are many shortcomings, increase dipping, dry workshop section as needs, existing fire retardant majority is some chemical industry solutions, and price is very high, expense is very big, this makes the plank totle drilling cost increase considerably, and the mechanical performance index of plank is seriously descended, and has also increased the pollution to environment in the dipping that increases chemical substance such as fire retardant, drying process.China Patent No. ZL91106445.1 once disclosed the formula for a product technical scheme of a kind of " fire-retarding compound board made of plant fabric and raw-vermiculite ", this composite plate primary raw material is compounded to form according to certain prescription by fabric and raw-vermiculite, adhesive, middle fibre, burning-resistant medium density fibreboard according to this prescription making, its major defect is that the medium density fibre board (MDF) weight of unit are is bigger, fabric and raw-vermiculite density generally is 2～2.3 times of lumber fibre, in today that present building material generally adopts lightness, its purposes is restricted certainly.
Summary of the invention
The object of the present invention is to provide a kind of light weight, environmental pollution is little, burning-resistant medium density fibreboard that production cost is lower and manufacture method thereof.
The object of the present invention is achieved like this: a kind of burning-resistant medium density fibreboard, comprise lignocellulosic material, adhesive and fire proofing, it is characterized in that: described fire proofing is the expanded vermiculite particle, this expanded vermiculite particle addition is 20%～80% of a bone dry fiber material weight, and the adhesive addition is the 15%-20% of bone dry fiber material weight.
Described fire proofing also comprises vermiculite power, and this vermiculite power addition is 0%～20% of a bone dry fiber material weight.
Described vermiculite power particle diameter is between 20～100 μ m; Expansion rate is between 0～5 times.
Described expanded vermiculite particle diameter is between 100～8000 μ m; Expansion rate is between 5～50 times.
A kind of method of making burning-resistant medium density fibreboard may further comprise the steps: wood materials is cut into slices; Particle resolves into the fiber wood pulp through boiling, defibrator process in defibrator; The fiber wood pulp is carried out applying glue, mixes glue; At fiber drying pipeline inner drying; The back employing preformer of mating formation on spreading machine is pressed into slab in advance; Slab is hot pressed into blank flat; Blank flat jagsaw limit, sanding are handled and formed the manufactured goods medium density fibre board (MDF), it is characterized in that: described wood fibre enters and adds expanded vermiculite particle or expanded vermiculite particle, vermiculite power fire proofing before the step of mating formation.
Described vermiculite power mixes the back to be added in the lignocellulosic material by the glue pump with adhesive.
Described expanded vermiculite particle adds in the lignocellulosic material by the jet cast feeder in the fiber drying pipeline.
Described expanded vermiculite particle is shed roller discharging opening place by the vibration blanking device at fiber and is added in the lignocellulosic material.
Described expanded vermiculite particle adds in the lignocellulosic material after pre-applying glue.
Described spreading machine is provided with the negative pressure suction box, and the negative pressure suction box is positioned at the guipure both sides up and down of mating formation at the place of mating formation.
Beneficial effect of the present invention: vermiculite is a kind of secondary metamorphic mineral of water aluminosilicate that contains magnesium of layer structure, has insulating refractory performance preferably, with its medium density fibre board (MDF) of producing as fire proofing, with the medium density fibre board (MDF) contrast of adopting fire retardant to make, have advantages such as pollution-free, that the fire proofing cost is lower, the B2 level (promptly difficult combustion level) of GB8624-1997 national standard can be reached, public work can be widely used in, as finishing and furniture productions such as hotel, cinemas.Expanded vermiculite is that vermiculite forms after high-temperature roasting, under certain high temperature, can obtain the vermiculite of different expansion rates according to different particle size, roasting time length, its volume generally can expand several times to tens times, and the average unit weight of the vermiculite after the expansion is 80～300kg/m
3, be a kind of light weight material, can effectively reduce medium density fibre board (MDF) weight.
As a further improvement on the present invention, on spreading machine, be provided with the negative pressure suction box, the negative pressure suction box is positioned at the guipure both sides up and down of mating formation at the place of mating formation, can be by the control of negative pressure pressure, the different floating velocities that utilize various material to have, thin expanded vermiculite particle, wood fibre are drawn onto upper and lower surface, the centre is a coarse fodder, the medium density fibre board (MDF) of making so is not even matter, is grading structure, middle coarse fodder, the both sides fines, mechanical strength is good, and surperficial exquisiteness and surperficial vermiculite power density is greater than the centre, good flame retardation effect.
Description of drawings
Fig. 1 is a burning-resistant medium density fibreboard manufacture method flow chart;
Fig. 2 is for making burning-resistant medium density fibreboard production process structural representation.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described in further detail.
Burning-resistant medium density fibreboard of the present invention, primary raw material includes lignocellulosic material, adhesive and expanded vermiculite particle fire proofing, expanded vermiculite particle addition is 20%～80% of a bone dry fiber material weight, the adhesive addition is that (addition of adhesive calculates with the solid content of adhesive for the 15%-20% of bone dry fiber material weight, with the urea-formaldehyde glue is example, and its solids content of user mode is about 60% usually.)。Wherein, generally between 100～8000 μ m, the medium density fibre board (MDF) quality that expansion rate is made between 5～50 times is better for the expanded vermiculite particle diameter of employing.Certainly, in the raw material of medium density fibre board (MDF), also can add vermiculite power on a small quantity, the common expansion rate of vermiculite power is between 0～5 times, addition is 0%～20% of a bone dry fiber material weight, particle diameter is small, generally between 20～100 μ m, like this, vermiculite power just can fill part and be mixed in the adhesive, is evenly distributed on the medium density fibre board (MDF).
As shown in Figure 1 and Figure 2: the manufacture method of burning-resistant medium density fibreboard of the present invention is as follows, at first uses equipment such as wood chipping equipment, roll squeezer with sections such as medium density fibre board (MDF) waste, branch wooden fork, discarded furniture planks; Particle makes wood fibre softening from the cooker 11 interior thermophilic digestions that stopper spiral 10 enters defibrator 1, in defibrator mill chamber 12, drive mill and resolve into the fiber wood pulp by motor 13, the fiber wood pulp is in grout outlet 14 enters fiber drying pipeline 2, fiber wood pulp in defibrator grout outlet 14 places are provided with 3 pairs of grout outlets 14 of size applicator carries out applying glue, mix glue, size applicator 3 is by glue pond 30, glue pump 31 and sebific duct 32 are formed, sebific duct 32 gum outlets are installed in the grout outlet 14, can add a certain amount of vermiculite power in the adhesive in glue pond 30, addition is 0%～20% of a bone dry fiber material weight; Fiber wood pulp after the applying glue is handled at fiber drying pipeline 2 inner dryings, the hot-air of pipeline 2 is provided by heater 20 and blower fan 21, in this fiber drying pipeline 2, be provided with a jet cast feeder 4, expanded vermiculite is from dog-house 40 blankings of jet cast feeder 4, under the high wind of blower fan 41 drives, enter in the fiber drying pipeline 2 and mix with wood fibre, through cyclone separator 42 thermal current is drained, remaining wood fibre is discharged from rotary unloading valve 43 again, and temporary in feed bin 5 through feed bin screw rod 50; Wood fibre in the feed bin 5 is carried and is shed roller 61 through fiber and shed on the guipure 62 of mating formation of below by feed bin belt 60, the discharging opening of shedding roller 61 at fiber is provided with an expanded vermiculite cast feeder 7, comprise a conveying worm 70 and a vibration blanking device 71, expanded vermiculite is transported to vermiculite on the vibration blanking device 71 through conveying worm 70, and vibration blanking device 71 shakes expanded vermiculite to loose and evenly be mixed into fiber and sheds in the wood fibre at roller 61 discharging opening places; After paving the medium density fibre board (MDF) raw material on the spreading machine 6, enter into preformer 9 and be pressed into slab in advance by the direction of arrow; Slab is hot pressed into blank flat; Blank flat jagsaw limit, sanding are handled and are made the finished product medium density fibre board (MDF) at last, because of broken removal of impurities in timber early stage and later stage die mould production process all belong to the mature technology that existing medium density fibre board (MDF) is produced, Fig. 2 does not provide this two-part production process concrete structure schematic diagram.In whole production process, have the feeding point that three places add the vermiculite fire proofing, a place is grout outlet 14 places, because of it is Powdered, can directly and after the adhesive mixing be added by glue pump 31, like this, vermiculite power can be evenly distributed in the fiber wood pulp with adhesive; Another is in the fiber drying pipeline, because of stream pressure is bigger here, between 2000～5000Pa, needs to adopt blower fan 41 feedings, and the 3rd place is that the fiber before mating formation is shed roller discharging opening place, is standard atmospheric pressure here, can adopt and shed the hybrid mode interpolation.The feeding point that three places add the vermiculite fire proofing can add simultaneously; also can be separately or two places add; the vermiculite granule of expanded vermiculite interpolation place can also adopt the raw material of different size specifications respectively; such as the expanded vermiculite that in the fiber drying pipeline, adds the 5mm particle diameter, add the expanded vermiculite of 8mm particle diameter in vibration blanking device 71 positions.In addition, also can carry out earlier adding in the wood fibre after the pre-applying glue to the expanded vermiculite particle.In order to improve the outward appearance of manufactured goods burning-resistant medium density fibreboard, every index parameter such as mechanical property, as a further improvement on the present invention, on spreading machine 6, be provided with negative pressure suction box 8, negative pressure suction box 8 be positioned at mat formation the place the guipure of mating formation about in the of 60 both sides, on negative pressure suction box 8, be provided with negative pressure suction opeing 80, negative pressure suction opeing 80 connects the pressure that can control behind the negative pressure source of the gas in the negative pressure suction box 8, the different floating velocities that utilize various material to have, with thin expanded vermiculite particle, wood fibre is drawn onto upper and lower surface, the centre is a coarse fodder, the medium density fibre board (MDF) of making so is not even matter, is grading structure, middle coarse fodder, the both sides fines, mechanical strength is good, and surperficial exquisiteness and surperficial vermiculite power density are big, good flame retardation effect.Expanded vermiculite also has functions such as antibiotic, sound absorption, insulation except having flame-retarding characteristic, be a kind of desirable fire-retardant building material with the medium density fibre board (MDF) of its making.
Claims (10)
1. burning-resistant medium density fibreboard, comprise lignocellulosic material, adhesive and fire proofing, it is characterized in that: described fire proofing is the expanded vermiculite particle, this expanded vermiculite particle addition is 20%～80% of a bone dry fiber material weight, and the adhesive addition is the 15%-20% of bone dry fiber material weight.
2. burning-resistant medium density fibreboard according to claim 1 is characterized in that: described fire proofing also comprises vermiculite power, and this vermiculite power addition is 0%～20% of a bone dry fiber material weight.
3. according to the method for the described manufacturing burning-resistant medium density fibreboard of claim 2, it is characterized in that: described vermiculite power particle diameter is between 20～100 μ m; Expansion rate is between 0～5 times.
4. burning-resistant medium density fibreboard according to claim 1 is characterized in that: described expanded vermiculite particle diameter is between 100～8000 μ m; Expansion rate is between 5～50 times.
5. a method of making the described burning-resistant medium density fibreboard of claim 1 may further comprise the steps: wood materials is cut into slices; Particle resolves into the fiber wood pulp through boiling, defibrator process in defibrator; The fiber wood pulp is carried out applying glue, mixes glue; At fiber drying pipeline inner drying; The back employing preformer of mating formation on spreading machine is pressed into slab in advance; Slab is hot pressed into blank flat; Blank flat jagsaw limit, sanding are handled and formed the manufactured goods medium density fibre board (MDF), it is characterized in that: described wood fibre enters and adds expanded vermiculite particle or expanded vermiculite particle, vermiculite power fire proofing before the step of mating formation.
6. according to the method for the described manufacturing burning-resistant medium density fibreboard of claim 5, it is characterized in that: described vermiculite power mixes the back to be added in the lignocellulosic material by the glue pump with adhesive.
7. according to the method for the described manufacturing burning-resistant medium density fibreboard of claim 5, it is characterized in that: described expanded vermiculite particle adds in the lignocellulosic material by the jet cast feeder in the fiber drying pipeline.
8. according to the method for the described manufacturing burning-resistant medium density fibreboard of claim 5, it is characterized in that: described expanded vermiculite particle is shed roller discharging opening place by the vibration blanking device at fiber and is added in the lignocellulosic material.
9. according to the method for the described manufacturing burning-resistant medium density fibreboard of claim 5, it is characterized in that: described expanded vermiculite particle adds in the lignocellulosic material after pre-applying glue.
10. according to the method for the described manufacturing burning-resistant medium density fibreboard of claim 5, it is characterized in that: described spreading machine is provided with the negative pressure suction box, and the negative pressure suction box is positioned at the guipure both sides up and down of mating formation at the place of mating formation.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100297732A CN101108503A (en) | 2007-08-20 | 2007-08-20 | Flame retardant medium density fiberboard and manufacturing method therefor |
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| CNA2007100297732A CN101108503A (en) | 2007-08-20 | 2007-08-20 | Flame retardant medium density fiberboard and manufacturing method therefor |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406970A (en) * | 2013-08-29 | 2013-11-27 | 广西三威林产工业有限公司 | Method for manufacturing flame-retardant medium-high density fiberboard |
| CN104502197A (en) * | 2014-12-31 | 2015-04-08 | 南京林业大学 | Continuous prepressing test method and continuous prepressing test device for medium-density fiberboard blank |
| CN105437352A (en) * | 2014-09-12 | 2016-03-30 | 北京盛大华源科技有限公司 | Fireproof medium-density fiber board and preparation method thereof |
| CN108621280A (en) * | 2018-06-01 | 2018-10-09 | 千年舟新材科技集团有限公司 | Negative ion flame-retardant sheet machining apparatus |
| CN108641389A (en) * | 2018-04-28 | 2018-10-12 | 郭迎庆 | A kind of preparation method of flame retardant type medium density fibre board (MDF) |
| CN108748599A (en) * | 2018-08-09 | 2018-11-06 | 福建省永安林业（集团）股份有限公司永安人造板厂 | A kind of laying device and method for paving of mountain flour fiber composite plate |
| CN108748596A (en) * | 2018-08-09 | 2018-11-06 | 福建省永安林业（集团）股份有限公司永安人造板厂 | A kind of preparation method for the fiberboard avoiding generating gum spot on steel band |
| CN108890846A (en) * | 2018-06-01 | 2018-11-27 | 千年舟新材科技集团有限公司 | Flame-proof sheet material process equipment |
| CN109109117A (en) * | 2018-06-01 | 2019-01-01 | 千年舟新材科技集团有限公司 | Anion sheet machining apparatus |
| CN112166016A (en) * | 2018-04-04 | 2021-01-01 | 斯道拉恩索公司 | Method of making a dry-laid mat for thermoforming |
| CN113415806A (en) * | 2021-07-30 | 2021-09-21 | 塔里木大学 | Method for expanding microparticle vermiculite |
| CN113442245A (en) * | 2021-01-26 | 2021-09-28 | 湖南城市学院 | Full-bamboo recombined bamboo and preparation method and application thereof |
| CN113601657A (en) * | 2021-07-02 | 2021-11-05 | 福建省永安林业(集团)股份有限公司 | Drying system for fiber gum dipping, sizing and additive synthesis |
-
2007
- 2007-08-20 CN CNA2007100297732A patent/CN101108503A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406970A (en) * | 2013-08-29 | 2013-11-27 | 广西三威林产工业有限公司 | Method for manufacturing flame-retardant medium-high density fiberboard |
| CN105437352A (en) * | 2014-09-12 | 2016-03-30 | 北京盛大华源科技有限公司 | Fireproof medium-density fiber board and preparation method thereof |
| CN105437352B (en) * | 2014-09-12 | 2017-12-15 | 北京盛大华源科技有限公司 | One kind fire prevention medium density fibre board (MDF) and preparation method thereof |
| CN104502197A (en) * | 2014-12-31 | 2015-04-08 | 南京林业大学 | Continuous prepressing test method and continuous prepressing test device for medium-density fiberboard blank |
| CN104502197B (en) * | 2014-12-31 | 2017-08-11 | 南京林业大学 | A kind of continuous pre-compression test method of medium density fibre board (MDF) slab |
| CN112166016A (en) * | 2018-04-04 | 2021-01-01 | 斯道拉恩索公司 | Method of making a dry-laid mat for thermoforming |
| CN112166016B (en) * | 2018-04-04 | 2022-10-04 | 斯道拉恩索公司 | Method of making a dry-laid mat for thermoforming |
| CN108641389A (en) * | 2018-04-28 | 2018-10-12 | 郭迎庆 | A kind of preparation method of flame retardant type medium density fibre board (MDF) |
| CN108621280A (en) * | 2018-06-01 | 2018-10-09 | 千年舟新材科技集团有限公司 | Negative ion flame-retardant sheet machining apparatus |
| CN108890846A (en) * | 2018-06-01 | 2018-11-27 | 千年舟新材科技集团有限公司 | Flame-proof sheet material process equipment |
| CN109109117A (en) * | 2018-06-01 | 2019-01-01 | 千年舟新材科技集团有限公司 | Anion sheet machining apparatus |
| CN108748596A (en) * | 2018-08-09 | 2018-11-06 | 福建省永安林业（集团）股份有限公司永安人造板厂 | A kind of preparation method for the fiberboard avoiding generating gum spot on steel band |
| CN108748599A (en) * | 2018-08-09 | 2018-11-06 | 福建省永安林业（集团）股份有限公司永安人造板厂 | A kind of laying device and method for paving of mountain flour fiber composite plate |
| CN108748599B (en) * | 2018-08-09 | 2024-05-14 | 福建省永安林业（集团）股份有限公司永安人造板厂 | Paving device and paving method for stone powder fiber composite board |
| CN113442245A (en) * | 2021-01-26 | 2021-09-28 | 湖南城市学院 | Full-bamboo recombined bamboo and preparation method and application thereof |
| CN113442245B (en) * | 2021-01-26 | 2023-04-28 | 湖南城市学院 | Whole bamboo recombined bamboo and preparation method and application thereof |
| CN113601657A (en) * | 2021-07-02 | 2021-11-05 | 福建省永安林业(集团)股份有限公司 | Drying system for fiber gum dipping, sizing and additive synthesis |
| CN113601657B (en) * | 2021-07-02 | 2023-06-27 | 福建省永安林业(集团)股份有限公司 | Drying system for fiber gum dipping sizing and additive synthesis |
| CN113415806A (en) * | 2021-07-30 | 2021-09-21 | 塔里木大学 | Method for expanding microparticle vermiculite |
| CN113415806B (en) * | 2021-07-30 | 2022-11-11 | 塔里木大学 | Method for expanding microparticle vermiculite |
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