CN101913183B - Load-bearing flakeboard with composite structure and preparation method thereof - Google Patents

Load-bearing flakeboard with composite structure and preparation method thereof Download PDF

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Publication number
CN101913183B
CN101913183B CN201010259717XA CN201010259717A CN101913183B CN 101913183 B CN101913183 B CN 101913183B CN 201010259717X A CN201010259717X A CN 201010259717XA CN 201010259717 A CN201010259717 A CN 201010259717A CN 101913183 B CN101913183 B CN 101913183B
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flakeboard
bamboo
load
composite
bearing
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CN201010259717XA
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Chinese (zh)
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CN101913183A (en
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李贤军
蔡智勇
余雁
关明杰
傅峰
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中南林业科技大学
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Abstract

The invention belongs to the field of artificial boards and preparation methods thereof, particularly discloses a load-bearing flakeboard with a composite structure and a preparation method thereof. The flakeboard is prepared by using sizing wood flakes as a substrate material, and a bamboo function layer is arranged in the flakeboard close to the bottom surface of the flakeboard. The preparation method comprises the steps of: planing a log material to obtain wood flakes and then drying the wood flakes, spraying a urea resin adhesive and a waterproofing agent to the surface of dried wood flakes, wherein the spraying quantity is 7-10% and 0.3-1% of the quantity of the wood flakes respectively; then sectioning and grinding bamboo raw materials into bamboo bundles with diameter under 3mm and drying the bamboo bundles, dipping the bamboo bundles in phenolic resin and then drying, and then obtaining finished products through paving, pre-pressing, hot-pressing, cooling and edge cutting. The flakeboard has the advantages of strong bending strength, strong toughness, high resource utilization level, low cost and the like, and can be widely applied in the manufacturing of wood stairs and large-breadth panels.

Description

Load-bearing flakeboard with composite structure and preparation method thereof
Technical field
The present invention relates to a kind of wood-based plate and preparation method thereof, relate in particular to flakeboard of a kind of composite construction and preparation method thereof.
Background technology
At present, China's artificial board output has occupied the first in the world, and wherein flakeboard, fiberboard and glued board are listed as " the three big plates " in the wood-based panel product.Flakeboard (particleboard) is to be main material with wooden particle, and resin, waterproofing agent are auxiliary material, the wood-based plate that forms in high temperature, condition of high voltage pressed.Compare with sheet, flakeboard production is raw material with small dimension wood, thinnings, brush wood mainly, has characteristics such as material source is extensive, resource utilization height.At present, flakeboard has been widely used in aspects such as furniture manufacturing, interior decoration.But defectives such as flakeboard is made up of the particle of junior unit, and it is low to have intensity, and particularly bending strength is low, toughness is low, fragility is big.When bearing the moment of flexure excessive load, common wooden flakeboard presents the moment damage feature, the notable feature of the material that enbrittles.Therefore, in furniture manufacturing and interior decoration, woody debris's plate has received greatly restriction at the manufacture view of load-carrying members parts.In actual production; Though can remedy the defective that the flakeboard bending strength is low, toughness is low, fragility is big through increasing thickness; But directly caused the unusual heavy problem of present flakeboard article of furniture; This has not only wasted a large amount of wooden resources, and has increased cost of transportation, returns people's life and has brought inconvenience.
On the other hand, China's bamboo grove area, accumulation, the bamboo output value all occupy first place in the world, and have the title of " bamboo kingdom ".Compare with timber, bamboo wood has the advantages that material is hard, intensity is big, dimensional stability is good.Since the eighties in last century, China has begun the industrial applications and the research of bamboo matter resource, has developed series of products such as bamboo floor, bamboo furniture, bamboo building template, bamboo handicraft in succession.But because bamboo wood has the hollow cylindrical structure, in the process of most bamboo products, all the bamboo meat of surf green and tabasheer and part is cut, and utilization rate of bamboo is low, generally is merely 20%~40%.If can the bamboo matter resource of underusing be used for the production of load-carrying members flakeboard, this all has important practical significance to the utilization again of natural resources and the production of lightweight furniture and woodwork.
Summary of the invention
The technical problem that the present invention will solve is the deficiency that overcomes prior art; Provide that a kind of bending strength is big, toughness is strong, resource utilization is high, cost is low and can be widely used in bimber stair, the load-bearing flakeboard with composite structure made of panel significantly, also corresponding provide a kind of simple to operate, energy consumption is little, cost is low, the preparation method of the load-bearing flakeboard with composite structure of less equipment investment.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of load-bearing flakeboard with composite structure, and said flakeboard is to be host material with applying glue wood particle, and the position near its bottom surface in the said flakeboard is provided with a bamboo material function layer.
In the above-mentioned load-bearing flakeboard with composite structure, said bamboo material function layer is preferably evenly arranged by impregnation bamboo bundle and is formed.
In the above-mentioned load-bearing flakeboard with composite structure, the mass ratio of said bamboo material function layer and said host material is preferably (1~15): 50.
In the above-mentioned load-bearing flakeboard with composite structure, preferably more than 10mm, the distance of the bottom of said bamboo material function layer and said flakeboard bottom surface is d to the thickness D of said flakeboard, and d/D be preferably=0.05~0.4.
The technical thought of the above-mentioned load-bearing flakeboard with composite structure of the present invention derives from widely used precast reinforced concrete plate structure principle in the building construction.We liken existing common flakeboard to is cement pre-fabricated panel; Because cement pre-fabricated panel can be through embedded bar to strengthen its bending strength; Therefore we just associate also prefabricated enhancing sexual function materials in flakeboard, to improve the mechanical property of flakeboard.Even possessed so creative thinking, but the enhancing sexual function material chosen but is a very critical problem, based on this; We creatively associate bamboo wood again; Through bamboo wood is rolled processing, process the bamboo bundle that contains surf green and tabasheer, carry out itself and wooden particle compound again; Then both can solve the low problem of utilization rate of bamboo; The characteristics that simultaneously can utilize bamboo wood to have high strength, high tenacity are produced a kind of novel load-bearing flakeboard, to overcome the deficiency of existing common wooden flakeboard, expand its application.Based on this; A kind of load-bearing flakeboard with composite structure has been proposed to the invention property; Matrix wood particle in the load-bearing flakeboard with composite structure of the present invention promptly is equivalent to the cement matrix in the precast reinforced concrete plate; And bamboo material function layer promptly is equivalent to reinforcing steel bar layer in the prefabricated board, and wall scroll impregnation bamboo Shu Ze is similar to the single steel bar in the prefabricated board.Compare with common flakeboard, load-bearing flakeboard with composite structure of the present invention has the distinguishing feature that bending strength is big, toughness is strong, can be widely used in bimber stair, the manufacturing of load-carrying members parts such as panel significantly.In practical applications; The side that load-bearing flakeboard with composite structure of the present invention contains bamboo material function layer should be positioned at the side of bearing tension (be bamboo material function layer near the bottom surface of plate surface during as commercial Application), it is same reason that the one side that contains reinforcing bar as precast reinforced concrete plate in the house building is positioned at the below.
As a total technical conceive, the present invention also provides a kind of preparation method of load-bearing flakeboard with composite structure, may further comprise the steps:
(1) cut plane: to log material chip, flaking, make wooden particle;
(2) drying: the wooden particle that step (1) is made carries out drying;
(3) applying glue: spray urea-formaldehyde resin adhesive and waterproofing agent to dried wooden particle surface, the amount of spraying of said urea-formaldehyde resin adhesive is 7%~10% of a wooden particle quality, and the amount of spraying of said waterproofing agent is 0.3%~1% of a wooden particle quality;
(4) system is restrainted: former bamboo wood material is dissectd obtain bamboo band, through rolling bamboo band is processed into the bamboo bundle of diameter below 3mm again, and this bamboo Shu Jinhang is dry;
(5) impregnation: the bamboo bundle that step (4) is made places phenolic resins to carry out impregnation process, and is fully again that the impregnation bamboo Shu Jinhang that obtains is dry behind the dipping;
(6) mat formation: the applying glue wood particle that makes with step (3) earlier carries out the laying of flakeboard bottom; And the thickness of controlling this flakeboard bottom is 1mm~20mm; The impregnation bamboo bundle single berth that then step (5) is made installs to and obtains bamboo material function layer on this flakeboard bottom; On this bamboo material function layer, continue to lay applying glue wood particle again, and the mass ratio of controlling used applying glue wood particle and bamboo material function layer is 50: (1~15) obtains the flakeboard crude green body;
(7) precompressed: in cold press, said flakeboard crude green body is carried out precompressed and get slab, unit pressure is controlled at 1.0MPa~1.5MPa during precompressed;
(8) hot pressing: in hot press, the slab after the above-mentioned precompressed is carried out moulding hot pressing, the pressure during moulding hot pressing is controlled at 2.0MPa~3.0MPa, and temperature is controlled at 130 ℃~170 ℃, and hot pressing time is 7~20 s/mm;
(9) subsequent treatment: the semi-finished product to after the hot pressing cool off, cutting edge, obtain load-bearing flakeboard with composite structure.
Above-mentioned preparation method of the present invention is to be main material with wooden particle and impregnation bamboo bundle; With resin, waterproofing agent etc. is auxiliary material; In the assembly operation that common flakeboard is produced; The impregnation that will have high-tensile, high tenacity rolls the bamboo bundle mats formation in the wooden particle matrix near the slab bottom, strengthens the load-bearing flakeboard with composite structure that bamboo is restrainted through precompressed, a kind of novel containing hot-forming and that subsequent treatment production makes again.In above-mentioned load-carrying members particle board manufacture method, adopt impregnation to roll bamboo Shu Yumu particle and carry out compoundly, one makes full use of characteristics such as high-tensile that bamboo Shu Benshen has, high tenacity; Tension, anti-bending mechanics intensity and toughness with remarkable enhancing flakeboard; Two in the rolling of bamboo bundle, and do not have cut, except bamboo meat; Surf green and tabasheer part all are utilized; Utilization rate of bamboo high (can reach more than 90%, particularly the utilization of surf green) has reached and has improved utilization rate of bamboo and the double effects that strengthens finished product flakeboard mechanical strength.
Among the preparation method of above-mentioned load-bearing flakeboard with composite structure, the length of the wooden particle that said step (1) makes, width, thickness preferably are controlled at below the 20mm respectively, below the 5mm, below the 1mm.
Among the preparation method of above-mentioned load-bearing flakeboard with composite structure, the solids content of said urea-formaldehyde resin adhesive is preferably 40%~60%; Said waterproofing agent can be known various waterproofing agents, but is preferably paraffin wax emulsions; The solids content of said phenolic resins is preferably 10%~60%.
Among the preparation method of above-mentioned load-bearing flakeboard with composite structure, said drying process is meant that preferably the moisture content with the object that is dried controls to 2%~5%; Wherein, the baking temperature in the step (2) preferably is controlled at 150 ℃~180 ℃, and the baking temperature in the step (4) preferably is controlled at 70 ℃~100 ℃, and the baking temperature in the step (5) preferably is controlled at 60 ℃~80 ℃.
Among the preparation method of above-mentioned load-bearing flakeboard with composite structure, the time of flooding in the said impregnation step preferably is controlled at 0.5h~24h.
Compared with prior art; Advantage of the present invention just is: deficiencies such as the bending strength that exists to existing common flakeboard is low, toughness is low, fragility is big; Utilize the bamboo matter resource of China's abundant; Developed a kind of novel load-bearing flakeboard with composite structure, the also corresponding simultaneously preparation technology that this load-bearing flakeboard with composite structure is provided.Load-bearing flakeboard with composite structure of the present invention has the distinguishing feature that bending strength is big, toughness is strong, can be widely used in bimber stair, the manufacturing of load-carrying members parts such as panel significantly.Meanwhile, preparation technology of the present invention is simple, convenient, and cost is low, especially can make full use of existing discarded bamboo matter resource, has improved the utilization rate of resource greatly.Economic benefit of the present invention and resource environment benefit are all very obvious, have broad application prospects.
Description of drawings
Fig. 1 is the structural representation of load-bearing flakeboard with composite structure of the present invention; Wherein, 1 is host material, and 2 are impregnation bamboo bundle.
Fig. 2 is that the load-bearing flakeboard with composite structure section of the common flakeboard and the embodiment of the invention 1 destroys the situation photo; Wherein, A is common flakeboard, and B is a load-bearing flakeboard with composite structure of the present invention.
Damage curve comparison diagram when Fig. 3 receives moment of flexure for common flakeboard and load-bearing flakeboard with composite structure of the present invention; Wherein, 1. representing the damage curve of common flakeboard, 2. is the damage curve of (3.0 kg applying glues wood particle and the production of 0.3 kg impregnation bamboo bundle assembly) load-bearing flakeboard with composite structure of the embodiment of the invention 1; 3. be the damage curve of the load-bearing flakeboard with composite structure of the embodiment of the invention 2 (2.4 kg applying glues wood particle and the production of 0.6 kg impregnation bamboo bundle assembly).
The specific embodiment
Embodiment 1
A kind of load-bearing flakeboard with composite structure of the present invention as shown in Figure 1, this flakeboard are to be host material 1 with applying glue wood particle, and the position near its bottom surface in the flakeboard is provided with a bamboo material function layer.This bamboo material function layer is evenly to be distributed by impregnation bamboo bundle 2 to form.The mass ratio of bamboo material function layer and host material 1 is 1: 10.The sectional dimension of this load-bearing flakeboard with composite structure (promptly long * wide) is 460mm * 460mm, thickness D=12.7mm, and the distance of the bottom of bamboo material function layer and flakeboard bottom surface is d=1.5mm.
The preparation method of the load-bearing flakeboard with composite structure of present embodiment may further comprise the steps:
(1) cut plane: adopt drum chipper that log material is processed into wood chip, with ring flaker wood chip is processed into wooden particle again, the length of the wooden particle that makes is less than 20mm, and width is less than 5 mm, and thickness is less than 1 mm;
(2) drying: the wooden particle that in roller dryer, step (1) is made carries out drying, is controlled at 2.3% until the moisture content of wooden particle, and the baking temperature in the dry run is controlled at 160 ℃;
(3) applying glue: the dried wooden particle of 3kg is placed the roll-type glue mixer; Spray urea-formaldehyde resin adhesive (solids content is 60%) and waterproofing agent to dried wooden particle surface; The amount of spraying of urea-formaldehyde resin adhesive is 9% of a wooden particle quality; Waterproofing agent is a paraffin wax emulsions, and its amount of spraying is 0.5% of a wooden particle quality;
(4) system bundle: the former bamboo (former bamboo diameter is greater than 80mm) of getting length and be 2m (0.5m~2m all can); With cuing open the bamboo band that the bamboo machine along the circumferential direction is divided into former bamboo wood material 6~8 five equilibriums; Utilize the bamboo wood roller to roll again, bamboo band is processed into the bamboo bundle of diameter less than 3mm, in the process of rolling, generally will back and forth roll 3~5 times; And, reach 2.1% until bamboo bundle moisture content with this bamboo Shu Jinhang dry (baking temperature is 85 ℃);
(5) impregnation: the bamboo bundle that step (4) is made places phenolic resins (solids content is 30%) to carry out impregnation process; Dip time is 12h; Fully again that the impregnation bamboo Shu Jinhang that obtains is dry behind the dipping; Moisture content until impregnation bamboo bundle reaches 3.2%, and the temperature of hothouse is controlled at 70 ℃ in the dry run;
(6) mat formation: get the impregnation bamboo bundle assembly that applying glue wood particle that 3 kg steps (3) make and 0.3 kg step (5) make, assembly is in cross dimensions is the assembly case of 460 mm * 460 mm, to carry out; The applying glue wood particle that makes with few steps (3) earlier carries out the laying of flakeboard bottom; And the thickness of controlling this flakeboard bottom is 5mm; Impregnation bamboo bundle single berth with 0.3kg installs to the bamboo material function layer of acquisition on this flakeboard bottom then; On this bamboo material function layer, continue to lay remaining applying glue wood particle again, and the mass ratio of controlling wooden particle and bamboo material function layer is 10: 1, obtains the flakeboard crude green body;
(7) precompressed: in cold press, said flakeboard crude green body is carried out precompressed and get slab, unit pressure is controlled at 1.2MPa during precompressed;
(8) hot pressing: in hot press, the slab after the above-mentioned precompressed is carried out moulding hot pressing, the pressure during moulding hot pressing is controlled at 2.5MPa, and temperature is controlled at 170 ℃, and hot pressing time is 140s, and target thickness is 12.7mm;
(9) subsequent treatment: the semi-finished product to after the hot pressing cool off, cutting edge, and the thickness that obtains present embodiment is the load-bearing flakeboard with composite structure of 12.7 mm.
The photo of the load-bearing flakeboard with composite structure section destruction situation of common flakeboard and present embodiment 1 is as shown in Figure 2; Can find out by Fig. 2; Common wooden flakeboard (seeing A figure) when bearing moment of flexure destruction, ruptures at the sheet material back side fully, demonstrates complete fracture crack (seeing in Fig. 2 circle); And load-bearing flakeboard with composite structure of the present invention (see B figure) is even the surface is because obviously protuberance (seeing in the oval circle of Fig. 2) appears in excess compression, and fracture crack does not appear in its sheet material back side yet.
Damage curve comparison diagram when the load-bearing flakeboard with composite structure of common flakeboard and present embodiment 1 receives moment of flexure is as shown in Figure 3, can obviously be found out by Fig. 3, and the ability that common wooden flakeboard bears moment of flexure is low, and destruction is to destroy moment; And the load-bearing flakeboard with composite structure of present embodiment bears the moment of flexure ability much larger than common wooden flakeboard; And has extraordinary flexibility; Even increase around degree (reach 2.3 times) more than 2 times, bending resistance load increases under 3.7 times the situation, do not rupture in the sheet material back side.
Embodiment 2:
A kind of load-bearing flakeboard with composite structure of the present invention as shown in Figure 1, this flakeboard are to be host material 1 with applying glue wood particle, and the position near its bottom surface in the flakeboard is provided with a bamboo material function layer.This bamboo material function layer is evenly to be distributed by impregnation bamboo bundle 2 to form.The mass ratio of bamboo material function layer and host material 1 is 1: 4.The sectional dimension of this load-bearing flakeboard with composite structure (promptly long * wide) is 460mm * 460mm, thickness D=12.7mm, and the distance of the bottom of bamboo material function layer and flakeboard bottom surface is d=1.5mm.
The preparation method of the load-bearing flakeboard with composite structure of present embodiment may further comprise the steps:
(1) cut plane: adopt drum chipper that log material is processed into wood chip, with ring flaker wood chip is processed into wooden particle again, the length of the wooden particle that makes is less than 20mm, and width is less than 5 mm, and thickness is less than 1 mm;
(2) drying: the wooden particle that in roller dryer, step (1) is made carries out drying, is controlled at 2.3% until the moisture content of wooden particle, and the baking temperature in the dry run is controlled at 160 ℃;
(3) applying glue: the dried wooden particle of 2.4kg is placed the roll-type glue mixer; Spray urea-formaldehyde resin adhesive (solids content is 60%) and waterproofing agent to dried wooden particle surface; The amount of spraying of urea-formaldehyde resin adhesive is 9% of a wooden particle quality; Waterproofing agent is a paraffin wax emulsions, and its amount of spraying is 0.5% of a wooden particle quality;
(4) system bundle: the former bamboo (former bamboo diameter is greater than 80mm) of getting length and be 2m (0.5m~2m all can); With cuing open the bamboo band that the bamboo machine along the circumferential direction is divided into former bamboo wood material 6~8 five equilibriums; Utilize the bamboo wood roller to roll again, bamboo band is processed into the bamboo bundle of diameter less than 3mm, in the process of rolling, generally will back and forth roll 3~5 times; And, reach 2.1% until bamboo bundle moisture content with this bamboo Shu Jinhang dry (baking temperature is 75 ℃);
(5) impregnation: the bamboo bundle that step (4) is made places phenolic resins (solids content is 30%) to carry out impregnation process; Dip time is 12h; Fully again that the impregnation bamboo Shu Jinhang that obtains is dry behind the dipping; Moisture content until impregnation bamboo bundle reaches 3.2%, and the temperature of hothouse is controlled at 80 ℃ in the dry run;
(6) mat formation: get the impregnation bamboo bundle assembly that applying glue wood particle that 2.4 kg steps (3) make and 0.6 kg step (5) make, assembly is in cross dimensions is the assembly case of 460 mm * 460 mm, to carry out; The applying glue wood particle that makes with few steps (3) earlier carries out the laying of flakeboard bottom; And the thickness of controlling this flakeboard bottom is 5mm; Then the impregnation bamboo bundle individual layer of 0.6kg is evenly mated formation and to this flakeboard bottom, obtain bamboo material function layer; On this bamboo material function layer, continue to lay remaining applying glue wood particle again, and the mass ratio of controlling wooden particle and bamboo material function layer is 4: 1, obtains the flakeboard crude green body;
(7) precompressed: in cold press, said flakeboard crude green body is carried out precompressed and get slab, unit pressure is controlled at 1.2MPa during precompressed;
(8) hot pressing: in hot press, the slab after the above-mentioned precompressed is carried out moulding hot pressing, the pressure during moulding hot pressing is controlled at 2.5MPa, and temperature is controlled at 170 ℃, and hot pressing time is 140s, and target thickness is 12.7mm;
(9) subsequent treatment: the semi-finished product to after the hot pressing cool off, cutting edge, and the thickness that obtains present embodiment is the load-bearing flakeboard with composite structure of 12.7 mm.
Damage curve comparison diagram when the load-bearing flakeboard with composite structure of common flakeboard and present embodiment 2 receives moment of flexure is as shown in Figure 3, can obviously be found out by Fig. 3, and the ability that common wooden flakeboard bears moment of flexure is low, and destruction is to destroy moment; And the load-bearing flakeboard with composite structure of present embodiment bears the moment of flexure ability much larger than common wooden flakeboard; And has extraordinary flexibility; Even increase more than 2 times around degree, bending resistance load increases under 5.9 times the situation; Not rupturing in the sheet material back side, has shown superior bending resistance, anti-overload ability and toughness.And the load-bearing flakeboard with composite structure of common flakeboard in the comparison diagram 3 (curve 1.), embodiment 1 (curve 2.) and embodiment 2 (curve 3.) can find out that the ratio of impregnation bamboo bundle is high more, and its bending resistance is strong more.

Claims (7)

1. load-bearing flakeboard with composite structure; Said flakeboard is to be host material with applying glue wood particle; It is characterized in that: only be provided with a bamboo material function layer in the said flakeboard in the position near its bottom surface, said bamboo material function layer is evenly to be arranged by impregnation bamboo bundle to form; The mass ratio of said bamboo material function layer and said host material is (1~15): 50.
2. load-bearing flakeboard with composite structure according to claim 1 is characterized in that: the thickness D of said flakeboard is more than 10mm, and the distance of the bottom of said bamboo material function layer and said flakeboard bottom surface is d, and d/D=0.05~0.4.
3. the preparation method of a load-bearing flakeboard with composite structure may further comprise the steps:
(1) cut plane: to log material chip, flaking, make wooden particle;
(2) drying: the wooden particle that step (1) is made carries out drying, and baking temperature is controlled at 150 ℃~180 ℃;
(3) applying glue: spray urea-formaldehyde resin adhesive and waterproofing agent to dried wooden particle surface, the amount of spraying of said urea-formaldehyde resin adhesive is 7%~10% of a wooden particle quality, and the amount of spraying of said waterproofing agent is 0.3%~1% of a wooden particle quality;
(4) system is restrainted: former bamboo wood material is dissectd obtain bamboo band, through rolling bamboo band is processed into the bamboo bundle of diameter below 3mm again, and this bamboo Shu Jinhang is dry, baking temperature is controlled at 70 ℃~100 ℃;
(5) impregnation: the bamboo bundle that step (4) is made places phenolic resins to carry out impregnation process, and fully again that the impregnation bamboo Shu Jinhang that obtains is dry behind the dipping, baking temperature is controlled at 60 ℃~80 ℃;
(6) mat formation: the applying glue wood particle that makes with step (3) earlier carries out the laying of flakeboard bottom; And the thickness of controlling this flakeboard bottom is 1mm~20mm; The impregnation bamboo bundle single berth that then step (5) is made installs to and obtains bamboo material function layer on this flakeboard bottom; On this bamboo material function layer, continue to lay applying glue wood particle again, and the mass ratio of controlling used applying glue wood particle and bamboo material function layer is 50: (1~15) obtains the flakeboard crude green body;
(7) precompressed: in cold press, said flakeboard crude green body is carried out precompressed and get slab, unit pressure is controlled at 1.0MPa~1.5MPa during precompressed;
(8) hot pressing: in hot press, the slab after the above-mentioned precompressed is carried out moulding hot pressing, the pressure during moulding hot pressing is controlled at 2.0MPa~3.0MPa, and temperature is controlled at 130 ℃~170 ℃, and hot pressing time is 7~20 s/mm;
(9) subsequent treatment: the semi-finished product to after the hot pressing cool off, cutting edge, obtain load-bearing flakeboard with composite structure.
4. the preparation method of load-bearing flakeboard with composite structure according to claim 3 is characterized in that: the length of the wooden particle that said step (1) makes, width, thickness is controlled at below the 20mm respectively, below the 5mm, below the 1mm.
5. the preparation method of load-bearing flakeboard with composite structure according to claim 3, it is characterized in that: the solids content of said urea-formaldehyde resin adhesive is 40%~60%; Said waterproofing agent is a paraffin wax emulsions; The solids content of said phenolic resins is 10%~60%.
6. the preparation method of load-bearing flakeboard with composite structure according to claim 3, it is characterized in that: said drying process is meant that the moisture content with the object that is dried controls to 2%~5%.
7. the preparation method of load-bearing flakeboard with composite structure according to claim 3, it is characterized in that: in the said impregnation step, the time of dipping is controlled at 0.5h~24h.
CN201010259717XA 2010-08-23 2010-08-23 Load-bearing flakeboard with composite structure and preparation method thereof CN101913183B (en)

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CN102825645B (en) * 2012-09-24 2014-12-31 中南林业科技大学 Poplar sawn timber and manufacturing method thereof
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CN1018166B (en) * 1989-05-11 1992-09-09 武汉市白沙洲制材厂 A kind of new compound artificial board with bamboo and wood and manufacture method
JPH10159247A (en) * 1996-11-27 1998-06-16 Ig Tech Res Inc Composite heat insulation board
CN1189292C (en) * 2002-05-24 2005-02-16 浙江省林业科学研究院 Production process of recombined bamboo-gluing board
CN1193872C (en) * 2003-01-30 2005-03-23 南京林业大学 Material of enhanced stacked single plates of bamboo material and its mfg. method
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