CN101913185A - Method for manufacturing micron-size long light flake artificial boards - Google Patents
Method for manufacturing micron-size long light flake artificial boards Download PDFInfo
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- CN101913185A CN101913185A CN 201010263284 CN201010263284A CN101913185A CN 101913185 A CN101913185 A CN 101913185A CN 201010263284 CN201010263284 CN 201010263284 CN 201010263284 A CN201010263284 A CN 201010263284A CN 101913185 A CN101913185 A CN 101913185A
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Abstract
The invention relates to a method for manufacturing a micron-size long light flake artificial boards, relating to a method for manufacturing low-density artificial boards. The method solves the problems of higher density of light wood artificial boards manufactured by the traditional method and wood waste caused by pulverization, hot grinding and the like required by the traditional manufacturing method. The method comprises the following steps of: (1) processing wood into long flakes; (2) drying the flakes; (3) mixing the dried flakes with an adhesive and other additives; (4) paving the mixture into board blanks; (5) prepressing the board blanks for forming; (6) hot pressing the prepressed board blanks; and (7) aging the hot pressed boards to obtain the micron-size long light flake artificial boards. No foaming agent is used in the method, the obtained products have low density, and the raw materials are fully utilized; the manufacturing process is simple, the obtained products have strong use performance, and the method is applicable to the process for manufacturing the low-density light artificial boards.
Description
Technical field
The present invention relates to a kind of preparation method of lightweight synthetic plate, be specifically related to a kind of preparation method of low-density wood-based plate.
Background technology
Since " wildwood protected project " implemented; China's wildwood harvesting of wood amount sharply reduces; the shortage day by day of big footpath level high-quality timber, being badly in need of setting about research and development is the wood-base fibre and particle panel material product of raw material with " inferior, little, yule logs ", " tending and intermittent cutting of forest small dimension wood ", " three surplus materials ".At present, there are not density in domestic timber industry wood-based plate market particieboard, fiberboard family as yet at 0.3～0.45g/cm
3Between, having the plate kind of good physical mechanical property and machining property simultaneously, the density of wooden light-duty wood-based plate is basically all at 0.5g/cm
3More than, even if the density of ultrathin light fiberboard also is at 0.55g/cm
3About, and timber needs to pulverize, defibrator process, and use chemicals, caused a large amount of pollutions and the waste of timber.
Summary of the invention
The present invention be for the density that solves the wooden light-duty wood-based plate that existing method prepares bigger, with and preparation method thereof because need to pulverize, the problem of timber waste that defibrator process etc. causes, thereby a kind of preparation method of micron-size long flake lightweight synthetic plate is provided.
A kind of preparation method of micron-size long flake lightweight synthetic plate, it is finished by following steps: step 1, be that to be processed into thickness be that 30 μ m～200 μ m, length are that 35mm～80mm, width are the sliver wood shavings of 2mm～10mm for 8%～12% timber with moisture content; Step 2, the sliver wood shavings that step 1 is obtained are dried to moisture content under 97 ℃～103 ℃ temperature be 2%～4% wood shavings; Step 3, quality accounted for 1.0%～2.0% ammonium chloride that 15%～35% Lauxite of wood shavings gross mass that step 2 obtains and quality account for described Lauxite gross mass and mixes after, be sprayed onto on the wood shavings that step 2 obtains, obtain mixture; Step 4, the mixture that step 3 is obtained are mated formation into slab; Step 5, under the condition of room temperature, with the described slab of step 4 pressurize preliminary treatment 10s～20s under the pressure of 1.0MPa～2.0MPa, obtain pretreated sheet material; Step 6, be under 140～170 ℃ the condition, will behind pressurize heat treatment 2min～3min under the pressure of the pretreated sheet material of step 5 at 2.0MPa～3.0MPa, obtain sheet forming in temperature; Step 7, with behind the described sheet forming unloading pressure of step 6, ageing 12h～36h at ambient temperature obtains micron-size long flake lightweight synthetic plate;
The mass concentration of ammonium chloride described in the step 3 is 18%～22%, and the solids content of Lauxite is 45%～54%.
Beneficial effect: the density of the micron-size long flake lightweight synthetic plate that the present invention obtains is 0.3～0.5g/cm
3, with respect to the wooden light-duty wood-based plate that existing method obtains, density is reduced significantly; And method raw material of the present invention utilization is comparatively abundant, has avoided the waste of timber largely; And, the MOR of the micron-size long flake lightweight synthetic plate that the present invention obtains can reach 5.85～18.33MPa respectively, the modulus of elasticity in static bending can be up to 1072.51～3050.62MPa, internal bond strength is 0.35～0.73MPa, thickness swelling rate is 2.8～4.63%, positive nail-holding ability 450～810N, its every performance indications are all above Japanese light particleboard industrial standard.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method.
The specific embodiment
The specific embodiment one, this specific embodiment is described in conjunction with Fig. 1, a kind of preparation method of micron-size long flake lightweight synthetic plate, it is finished by following steps: step 1, be that to be processed into thickness be that 30 μ m～200 μ m, length are that 35mm～80mm, width are the sliver wood shavings of 2mm～10mm for 8%～12% timber with moisture content; Step 2, the sliver wood shavings that step 1 is obtained are dried to moisture content under 97 ℃～103 ℃ temperature be 2%～4% wood shavings; Step 3, quality accounted for 1.0%～2.0% ammonium chloride that 15%～35% Lauxite of wood shavings gross mass that step 2 obtains and quality account for described Lauxite gross mass and mixes after, be sprayed onto on the wood shavings that step 2 obtains, obtain mixture; Step 4, the mixture that step 3 is obtained are mated formation into slab; Step 5, under the condition of room temperature, with the described slab of step 4 pressurize preliminary treatment 10s～20s under the pressure of 1.0MPa～2.0MPa, obtain pretreated sheet material; Step 6, be under 140～170 ℃ the condition, will behind pressurize heat treatment 2min～3min under the pressure of the pretreated sheet material of step 5 at 2.0MPa～3.0MPa, obtain sheet forming in temperature; Step 7, with behind the described sheet forming unloading pressure of step 6, ageing 12h～36h at ambient temperature obtains micron-size long flake lightweight synthetic plate;
The mass concentration of ammonium chloride described in the step 3 is 18%～22%, and the solids content of Lauxite is 45%～54%.
This method has solved simultaneously in the existing low-density preparation method of artificial board and to have relied on blowing agent to reduce extrudate density to cause the problem that the technological element of a product is low, added value is low that preparation process is big to the pollution of timber, obtain.The preparation technology of this method is simple, and the goods serviceability is stronger.
The preparation method's of the specific embodiment two, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is that in the step 1 timber being processed into thickness is that 60 μ m～150 μ m, length are that 50mm～75mm, width are the sliver wood shavings of 5mm～8mm.
The preparation method's of the specific embodiment three, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is that the moisture content of timber is 10% in the step 1.
The preparation method's of the specific embodiment four, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is, the sliver wood shavings that in the step 2 step 1 obtained are dried to moisture content under 97 ℃～103 ℃ temperature be 3% wood shavings.
The preparation method's of the specific embodiment five, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is, after in the step 3 quality being accounted for 1.5% ammonium chloride that 25% Lauxite of wood shavings gross mass that step 2 obtains and quality account for described Lauxite gross mass and mixing, be sprayed onto on the wood shavings of step 2 acquisition, obtain mixture.
The preparation method's of the specific embodiment six, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is, the mass concentration of ammonium chloride described in the step 3 is 20%, and the solids content of Lauxite is 49.5%.
The preparation method's of the specific embodiment seven, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is, the slab that obtains in the step 4 is by the acquisition of evenly mating formation of the described mixture of step 3.
The present embodiment purpose is to make sheet material finished section structure hole distribution even, and mechanical property is uniform and stable.
The preparation method's of the specific embodiment eight, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is, in the step 5 under the pressure of slab that step 4 obtains at 1.5MPa pressurize preliminary treatment 15s, obtain pretreated sheet material.
The preparation method's of the specific embodiment nine, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is, step 6 is in temperature to be, under the pressure of 2.5MPa behind the heat treatment 2.5min, to obtain sheet forming under 155 ℃ of conditions.
The preparation method's of the specific embodiment ten, this specific embodiment and the specific embodiment one described a kind of micron-size long flake lightweight synthetic plate difference is that the digestion time described in the step 7 is 24 hours.
The micron-size long flake that present embodiment obtains prepares the lightweight synthetic plate, is 0.35g/cm through recording density
3
The micron-size long flake lightweight synthetic plate that present embodiment is obtained carries out Performance Detection, as shown in table 1, the every performance of micron-size long flake lightweight synthetic plate all surpasses the requirement of Japanese light particleboard industrial standard JISA5908 as can be seen, and its mechanical property is good, intensity is high, machining property is good.
Table 1
Claims (10)
1. the preparation method of a micron-size long flake lightweight synthetic plate, it is characterized in that: it is finished by following steps: step 1, be that to be processed into thickness be that 30 μ m～200 μ m, length are that 35mm～80mm, width are the sliver wood shavings of 2mm～10mm for 8%～12% timber with moisture content; Step 2, the sliver wood shavings that step 1 is obtained are dried to moisture content under 97 ℃～103 ℃ temperature be 2%～4% wood shavings; Step 3, quality accounted for 1.0%～2.0% ammonium chloride that 15%～35% Lauxite of wood shavings gross mass that step 2 obtains and quality account for described Lauxite gross mass and mixes after, be sprayed onto on the wood shavings that step 2 obtains, obtain mixture; Step 4, the mixture that step 3 is obtained are mated formation into slab; Step 5, under the condition of room temperature, with the described slab of step 4 pressurize preliminary treatment 10s～20s under the pressure of 1.0MPa～2.0MPa, obtain pretreated sheet material; Step 6, be under 140～170 ℃ the condition, will behind pressurize heat treatment 2min～3min under the pressure of the pretreated sheet material of step 5 at 2.0MPa～3.0MPa, obtain sheet forming in temperature; Step 7, with behind the described sheet forming unloading pressure of step 6, ageing 12h～36h at ambient temperature obtains micron-size long flake lightweight synthetic plate;
The mass concentration of ammonium chloride described in the step 3 is 18%～22%, and the solids content of Lauxite is 45%～54%.
2. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1 is characterized in that in the step 1 timber being processed into thickness is that 60 μ m～150 μ m, length are that 50mm～75mm, width are the sliver wood shavings of 5mm～8mm.
3. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1, the moisture content that it is characterized in that timber in the step 1 is 10%.
4. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1 is characterized in that in the step 2 that the sliver wood shavings that step 1 obtains are dried to moisture content under 97 ℃～103 ℃ temperature be 3% wood shavings.
5. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1, after it is characterized in that in the step 3 quality accounted for 1.5% ammonium chloride that 25% Lauxite of wood shavings gross mass that step 2 obtains and quality account for described Lauxite gross mass and mixing, be sprayed onto on the wood shavings of step 2 acquisition, obtain mixture.
6. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1, the mass concentration that it is characterized in that ammonium chloride described in the step 3 is 20%, the solids content of Lauxite is 49.5%.
7. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1 is characterized in that the slab that obtains in the step 4 is by the acquisition of evenly mating formation of the described mixture of step 3.
8. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1 is characterized in that in the step 5 pressurize preliminary treatment 15s under the pressure of slab at 1.5MPa that step 4 obtains, and obtains pretreated sheet material.
9. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1 is characterized in that in the step 6 it being in temperature to be, under the pressure of 2.5MPa behind the heat treatment 2.5min, to obtain sheet forming under 155 ℃ of conditions.
10. the preparation method of a kind of micron-size long flake lightweight synthetic plate according to claim 1 is characterized in that the digestion time described in the step 7 is 24 hours.
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| CN 201010263284 CN101913185A (en) | 2010-08-26 | 2010-08-26 | Method for manufacturing micron-size long light flake artificial boards |
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| CN 201010263284 CN101913185A (en) | 2010-08-26 | 2010-08-26 | Method for manufacturing micron-size long light flake artificial boards |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490238A (en) * | 2011-11-23 | 2012-06-13 | 东北林业大学 | Method for separating corn stalk peel and pulp |
| CN102501285A (en) * | 2011-11-23 | 2012-06-20 | 东北林业大学 | Method for preparing base material of composite floor by adopting corn straw skins |
| CN102501288A (en) * | 2011-11-23 | 2012-06-20 | 东北林业大学 | Method for preparing environment-friendly urea-formaldehyde resin adhesive particle plate of corn straw skins |
| CN103128826A (en) * | 2011-11-24 | 2013-06-05 | 大亚科技股份有限公司 | Manufacturing technique of highlight floor base material |
| CN103692532A (en) * | 2013-12-24 | 2014-04-02 | 浙江大友木业有限公司 | Method for preparing floor substrate by reed stems |
| CN104786342A (en) * | 2015-04-24 | 2015-07-22 | 东北林业大学 | Wood composite board with low-density sandwich-type structure and preparation method thereof |
| CN109016059A (en) * | 2018-08-17 | 2018-12-18 | 阜阳大可新材料股份有限公司 | A kind of preparation method of ultra-thin ultra-low formaldehyde burst size fiberboard |
-
2010
- 2010-08-26 CN CN 201010263284 patent/CN101913185A/en active Pending
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490238A (en) * | 2011-11-23 | 2012-06-13 | 东北林业大学 | Method for separating corn stalk peel and pulp |
| CN102501285A (en) * | 2011-11-23 | 2012-06-20 | 东北林业大学 | Method for preparing base material of composite floor by adopting corn straw skins |
| CN102501288A (en) * | 2011-11-23 | 2012-06-20 | 东北林业大学 | Method for preparing environment-friendly urea-formaldehyde resin adhesive particle plate of corn straw skins |
| CN102501285B (en) * | 2011-11-23 | 2014-07-02 | 东北林业大学 | Method for preparing base material of composite floor by adopting corn straw skins |
| CN103128826A (en) * | 2011-11-24 | 2013-06-05 | 大亚科技股份有限公司 | Manufacturing technique of highlight floor base material |
| CN103128826B (en) * | 2011-11-24 | 2015-04-15 | 大亚人造板集团有限公司 | Manufacturing technique of highlight floor base material |
| CN103692532A (en) * | 2013-12-24 | 2014-04-02 | 浙江大友木业有限公司 | Method for preparing floor substrate by reed stems |
| CN103692532B (en) * | 2013-12-24 | 2016-05-11 | 浙江大友木业有限公司 | A kind of method of preparing floor base material with reed rod |
| CN104786342A (en) * | 2015-04-24 | 2015-07-22 | 东北林业大学 | Wood composite board with low-density sandwich-type structure and preparation method thereof |
| CN109016059A (en) * | 2018-08-17 | 2018-12-18 | 阜阳大可新材料股份有限公司 | A kind of preparation method of ultra-thin ultra-low formaldehyde burst size fiberboard |
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Open date: 20101215 |