CN102431263A - Lightweight high-strength sandwich-structured wood-plastic composite sheet material and manufacture method for one-step molding of same - Google Patents
Lightweight high-strength sandwich-structured wood-plastic composite sheet material and manufacture method for one-step molding of same Download PDFInfo
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- CN102431263A CN102431263A CN201110274816XA CN201110274816A CN102431263A CN 102431263 A CN102431263 A CN 102431263A CN 201110274816X A CN201110274816X A CN 201110274816XA CN 201110274816 A CN201110274816 A CN 201110274816A CN 102431263 A CN102431263 A CN 102431263A
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Abstract
The invention provides a lightweight high-strength sandwich-structured wood-plastic composite sheet material and a manufacture method for one-step molding of the same, and relates to a wood-plastic composite sheet material and a manufacture method thereof. The invention enables the problems of small breadth, great density and large consumption of raw materials of existing wood-plastic composite materials to be overcome. The lightweight high-strength sandwich-structured wood-plastic composite sheet material comprises a core layer material, an upper surface layer material and a lower surface layer material. The manufacturing method comprises the following steps: mixing wood powder and thermoplastic powder, adding a coupling agent and carrying out mixing so as to obtain a surface layer material; mixing wood powder and thermoplastic powder, adding a coupling agent and AC foaming agent and carrying out mixing so as to obtain the core layer material; placing a thickness gauge; filling the surface layer material in a die, placing the core layer material, placing the surface layer material again and covering an upper cover plate; carrying out hot pressing after preheating; carrying out cooling and setting and unloading an obtained sheet material. The lightweight high-strength sandwich-structured wood-plastic composite sheet material forms a sandwich structure in one-step fusion, needing no adhesives or secondary compounding, can be processed into a panel with a large size, and has the advantages of great breadth, small density and small consumption of raw materials.
Description
Technical field
The present invention relates to a kind of wood-plastic composite panel and manufacturing approach thereof.
Background technology
Wood plastic composite (wood-plastics composites; Be called for short WPC) be via plastic processing Compound Machining or material that further processes or product by one or more cellulosic materials and one or more thermoplastics; It integrates the advantage of timber and plastics; Similar appearance of natural wood is not only arranged; And have anticorrosion, moistureproof, part degradability, environmental pollution is little, cost is low, water imbibition is little, good mechanical performance, creep resistant, anti-aging, advantage such as dimensional stability good, do not ftracture, and is higher than pure plastics hardness, and the processability of similar wood is arranged again.Application in industries such as building, automobile, indoor and outdoor floor and ornament materials is more and more extensive.Yet, the density of wood and plastic composite big (between the 0.9-1.05), transportation and use inconvenient operation; The most employing extruded processing technology, though but the product one-shot forming, width limited (below 150cm, the minority product is below 40cm usually), the place that is not suitable for needing to use large-breadth plates by using.
Summary of the invention
The problem that the breadth that the invention solves existing wood plastic composite is little, density big, the consumption of raw materials amount is big provides a kind of high-strength light sandwich wood-plastic composite panel and one-time formed manufacturing approach thereof.
High-strength light sandwich wood-plastic composite panel comprises core material; High-strength light sandwich wood-plastic composite panel also comprises upper epidermis material and following skin-material; Core material is arranged between upper epidermis material and the following skin-material, and fusion pressing between core material and upper epidermis material and the following skin-material.
The one-time formed manufacturing approach of high-strength light sandwich wood-plastic composite panel is carried out according to the following steps: one, with wood powder and thermoplastic powder by weight 60～50: 40～50 mix; Add coupling agent again; Form mixture; Mixture is put into high mixer mixing 10min, obtain skin-material; Two, with wood powder and thermoplastic powder by weight 50～30: 50～70 mix, and add coupling agent and AC blowing agent again, form mixture, and mixture is put into high mixer mixing 10min, obtain core material; Three, the two ends in framed are placed finger gauge to control sheet metal thickness are 6～16mm; Four, be that the skin-material of 2～5mm is mated formation in mould as skin-material down with thickness; Lay thickness is the core material of 2～10mm then; Repave put thickness be the skin-material of 2～5mm as the upper epidermis material, cover the upper cover plate of mould then on framed, obtain completing the mould of blank; Five, completing mould and die preheating to 120～140 ℃ of blank, be transplanted on then in the hot press, is 3～6MPa at pressure, at 180～185 ℃ of condition pressed 6～12min, reduces pressure to 0.3～1.3MPa then, continues hot pressing 2～4min; Six, hot pressing is cooled to 60～75 ℃ of typings after finishing, and then sheet material in the mould is unloaded, and promptly accomplishes the one-time formed manufacturing of high-strength light sandwich wood-plastic composite panel; Wherein the addition of coupling agent is 3%～6% of a thermoplastic powder quality in the step 1; The addition of coupling agent is 3%～6% of a thermoplastic powder quality in the step 2; The addition of AC blowing agent is 0.5%～1.5% of a thermoplastic powder quality in the step 2.
The skin-material and the sandwich layer layer material of high-strength light sandwich wood-plastic composite panel of the present invention once merge formation sandwich, need not to add adhesive or secondary is compound, and manufacture process is simplified, and the watch core layer fuses into one good connecting effect.
The one-time formed manufacturing approach of high-strength light sandwich wood-plastic composite panel of the present invention, the top layer can form closely knit skin-material for the material of no AC blowing agent, and is middle for adding the material of AC blowing agent, can form loose core material.This high-strength light sandwich wood-plastic composite panel can be processed into large size panel, and breadth reaches 1.22 * 2.44mm, bending strength 35MPa; Density is little, and (be 0.5～0.8g/cm), the consumption of raw materials amount is little, function admirable; Sound insulation, heat insulation and good damping effect, lighter weight, carrying and easy to process.
Description of drawings
Fig. 1 is the sketch map of high-strength light sandwich wood-plastic composite panel of the present invention, and wherein 1 is the upper epidermis material, and 3 are following skin-material, and 2 is core material; Fig. 2 is the sketch map of blank lay in framed before the hot pressing in the specific embodiment two, and wherein 4 be finger gauge, and 5 be framed, and 1 is the upper epidermis material, and 3 is time skin-material, and 2 is core material, and 6 is upper cover plate.
The specific embodiment
Technical scheme of the present invention is not limited to the following cited specific embodiment, also comprises the combination in any between each specific embodiment.
The specific embodiment one: combine Fig. 1 that this embodiment is described; This embodiment high-strength light sandwich wood-plastic composite panel comprises core material 2; High-strength light sandwich wood-plastic composite panel also comprises upper epidermis material 1 and following skin-material 3; Core material 2 is arranged between upper epidermis material 1 and the following skin-material 3, and fusion pressing between core material 2 and upper epidermis material 1 and the following skin-material 3.
The specific embodiment two: the one-time formed manufacturing approach of this embodiment high-strength light sandwich wood-plastic composite panel is carried out according to the following steps: one, with wood powder and thermoplastic powder by weight 60～50: 40～50 mix; Add coupling agent again; Form mixture; Mixture is put into high mixer mixing 10min, obtain skin-material; Two, with wood powder and thermoplastic powder by weight 50～30: 50～70 mix, and add coupling agent and AC blowing agent again, form mixture, and mixture is put into high mixer mixing 10min, obtain core material; Three, the two ends in framed are placed finger gauge to control sheet metal thickness are 6～16mm; Four, be that the skin-material of 2～5mm is mated formation in mould as skin-material 3 down with thickness; Lay thickness is the core material 2 of 2～10mm then; Repaving and putting thickness is that the skin-material of 2～5mm is as upper epidermis material 1; Cover the upper cover plate of mould then on framed, obtain completing the mould of blank; Five, completing mould and die preheating to 120～140 ℃ of blank, be transplanted on then in the hot press, is 3～6MPa at pressure, at 180～185 ℃ of condition pressed 6～12min, reduces pressure to 0.3～1.3MPa then, continues hot pressing 2～4min; Six, hot pressing is cooled to 60～75 ℃ of typings after finishing, and then sheet material in the mould is unloaded, and promptly accomplishes the one-time formed manufacturing of high-strength light sandwich wood-plastic composite panel; Wherein the addition of coupling agent is 3%～6% of a thermoplastic powder quality in the step 1; The addition of coupling agent is 3%～6% of a thermoplastic powder quality in the step 2; The addition of AC blowing agent is 0.5%～1.5% of a thermoplastic powder quality in the step 2.
Used wood powder in this embodiment step 1 and the step 2, thermoplastic powder are identical with the coupling agent composition.
The AC blowing agent is a Celogen Az in this embodiment step 2.
The mould endosexine scribbles releasing agent in this embodiment step 3.
Blank sketch map of lay in framed is as shown in Figure 2 before the hot pressing of this embodiment, and 4 be finger gauge among the figure, and 5 be framed, and 1 is the upper epidermis material, and 3 is time skin-material, and 2 is core material, and 6 is upper cover plate.
The specific embodiment two: what this embodiment and the specific embodiment one were different is: wood powder mixes by weight 60: 40 with the thermoplastic powder in the step 1.Other step and parameter are identical with the specific embodiment one.
The specific embodiment three: what this embodiment and the specific embodiment one were different is: wood powder mixes by weight 50: 50 with the thermoplastic powder in the step 1.Other step and parameter are identical with the specific embodiment one.
The specific embodiment four: what this embodiment and the specific embodiment one were different is: wood powder mixes by weight 55: 45 with the thermoplastic powder in the step 1.Other step and parameter are identical with the specific embodiment one.
The specific embodiment five: what this embodiment was different with one of specific embodiment one to four is: wood powder is 20～80 orders in the step 1, and moisture content is below 3%.Other step and parameter are identical with one of specific embodiment one to four.
The specific embodiment six: what this embodiment was different with one of specific embodiment one to five is: the said thermoplastic of step 1 is high density polyethylene (HDPE) or high density poly propylene.Other step and parameter are identical with one of specific embodiment one to five.
The specific embodiment seven: what this embodiment was different with one of specific embodiment one to six is: the said coupling agent of step 1 is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene.Other step and parameter are identical with one of specific embodiment one to six.
The specific embodiment eight: what this embodiment was different with one of specific embodiment one to seven is: the addition of coupling agent is 3% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to seven.
The specific embodiment nine: what this embodiment was different with one of specific embodiment one to seven is: the addition of coupling agent is 6% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to seven.
The specific embodiment ten: what this embodiment was different with one of specific embodiment one to seven is: the addition of coupling agent is 4% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to seven.
The specific embodiment 11: what this embodiment was different with one of specific embodiment one to seven is: the addition of coupling agent is 5% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to seven.
The specific embodiment 12: what this embodiment was different with one of specific embodiment one to 11 is: wood powder mixes by weight 50: 50 with the thermoplastic powder in the step 2.Other step and parameter are identical with one of specific embodiment one to 11.
The specific embodiment 13: what this embodiment was different with one of specific embodiment one to 11 is: wood powder mixes by weight 30: 70 with the thermoplastic powder in the step 2.Other step and parameter are identical with one of specific embodiment one to 11.
The specific embodiment 14: what this embodiment was different with one of specific embodiment one to 11 is: wood powder mixes by weight 40: 60 with the thermoplastic powder in the step 2.Other step and parameter are identical with one of specific embodiment one to 11.
The specific embodiment 15: what this embodiment was different with one of specific embodiment one to 14 is: the addition of AC blowing agent is 0.5% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to 14.
The specific embodiment 16: what this embodiment was different with one of specific embodiment one to 14 is: the addition of AC blowing agent is 1.5% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to 14.
The specific embodiment 17: what this embodiment was different with one of specific embodiment one to 14 is: the addition of AC blowing agent is 0.9% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to 14.
The specific embodiment 18: what this embodiment was different with one of specific embodiment one to 14 is: the addition of AC blowing agent is 1% of a thermoplastic powder quality in the step 1.Other step and parameter are identical with one of specific embodiment one to 14.
The specific embodiment 19: what this embodiment was different with one of specific embodiment one to 18 is: it is 6mm that the two ends placement finger gauge in the step 3 in framed is controlled sheet metal thickness.Other step and parameter are identical with one of specific embodiment one to 18.
The specific embodiment 20: what this embodiment was different with one of specific embodiment one to 18 is: it is 16mm that the two ends placement finger gauge in the step 3 in framed is controlled sheet metal thickness.Other step and parameter are identical with one of specific embodiment one to 18.
The specific embodiment 21: what this embodiment was different with one of specific embodiment one to 18 is: it is 10mm that the two ends placement finger gauge in the step 3 in framed is controlled sheet metal thickness.Other step and parameter are identical with one of specific embodiment one to 18.
The specific embodiment 22: what this embodiment was different with one of specific embodiment one to 18 is: it is 12mm that the two ends placement finger gauge in the step 3 in framed is controlled sheet metal thickness.Other step and parameter are identical with one of specific embodiment one to 18.
The specific embodiment 23: what this embodiment was different with one of specific embodiment one to 22 is: the said finger gauge of step 3 scribbles releasing agent.Other step and parameter are identical with one of specific embodiment one to 22.
The specific embodiment 24: what this embodiment was different with one of specific embodiment one to 23 is: be that the skin-material of 2mm is mated formation in mould as skin-material 3 down with thickness in the step 4; Lay thickness is the core material 2 of 10mm then, and repaving and putting thickness is that the skin-material of 2mm is as upper epidermis material 1.Other step and parameter are identical with one of specific embodiment one to 23.
The specific embodiment 25: what this embodiment was different with one of specific embodiment one to 23 is: be that the skin-material of 5mm is mated formation in mould as skin-material 3 down with thickness in the step 4; Lay thickness is the core material 2 of 8mm then, and repaving and putting thickness is that the skin-material of 5mm is as upper epidermis material 1.Other step and parameter are identical with one of specific embodiment one to 23.
The specific embodiment 26: what this embodiment was different with one of specific embodiment one to 23 is: be that the skin-material of 4mm is mated formation in mould as skin-material 3 down with thickness in the step 4; Lay thickness is the core material 2 of 7mm then, and repaving and putting thickness is that the skin-material of 4mm is as upper epidermis material 1.Other step and parameter are identical with one of specific embodiment one to 23.
The specific embodiment 27: what this embodiment was different with one of specific embodiment one to 26 is: the mould and die preheating to 120 ℃ of completing blank in the step 5.It is identical with one of specific embodiment one to 26 for its step and parameter.
The specific embodiment 28: what this embodiment was different with one of specific embodiment one to 26 is: the mould and die preheating to 140 ℃ of completing blank in the step 5.It is identical with one of specific embodiment one to 26 for its step and parameter.
The specific embodiment 29: what this embodiment was different with one of specific embodiment one to 26 is: the mould and die preheating to 130 ℃ of completing blank in the step 5.It is identical with one of specific embodiment one to 26 for its step and parameter.
The specific embodiment 30: what this embodiment was different with one of specific embodiment one to 29 is: be 3MPa at pressure in the step 5, at 185 ℃ of condition pressed 12min, reduce pressure then to 0.3MPa, continue hot pressing 4min.Other step and parameter are identical with the specific embodiment one to 29.
The specific embodiment 31: what this embodiment was different with one of specific embodiment one to 29 is: be 6MPa at pressure in the step 5, at 180 ℃ of condition pressed 6min, reduce pressure then to 1.3MPa, continue hot pressing 2min.Other step and parameter are identical with the specific embodiment one to 29.
The specific embodiment 32: what this embodiment was different with one of specific embodiment one to 29 is: be 5MPa at pressure in the step 5, at 182 ℃ of condition pressed 10min, reduce pressure then to 1MPa, continue hot pressing 3min.Other step and parameter are identical with the specific embodiment one to 29.
The specific embodiment 33: what this embodiment was different with one of specific embodiment one to 32 is: hot pressing is cooled to 60 ℃ of typings after finishing in the step 5.Other step and parameter are identical with one of specific embodiment one to 32.
The specific embodiment 34: what this embodiment was different with one of specific embodiment one to 32 is: hot pressing is cooled to 75 ℃ of typings after finishing in the step 5.Other step and parameter are identical with one of specific embodiment one to 32.
The specific embodiment 35: what this embodiment was different with one of specific embodiment one to 32 is: hot pressing is cooled to 70 ℃ of typings after finishing in the step 5.Other step and parameter are identical with one of specific embodiment one to 32.
The specific embodiment 36: the one-time formed manufacturing approach of this embodiment high-strength light sandwich wood-plastic composite panel is carried out according to the following steps: one, wood powder is mixed by weight 55: 45 with the thermoplastic powder; Add coupling agent again; Form mixture; Mixture is put into high mixer mixing 10min, obtain skin-material; Two, wood powder is mixed by weight 50: 50 with the thermoplastic powder, add coupling agent and AC blowing agent again, form mixture, mixture is put into high mixer mixing 10min, obtain core material; Three, the two ends in framed are placed finger gauge to control sheet metal thickness are 10mm; Four, be that the skin-material of 4mm is mated formation in mould as skin-material 3 down with thickness; Lay thickness is the core material 2 of 8mm then; Repave put thickness be the skin-material of 4mm as upper epidermis material 1, cover the upper cover plate of mould then on framed, obtain completing the mould of blank; Five, completing the mould and die preheating to 130 ℃ of blank, be transplanted on then in the hot press, is 6MPa at pressure, at 185 ℃ of condition pressed 10min, reduces pressure then to 1MPa, continues hot pressing 4min; Six, hot pressing is cooled to 70 ℃ of typings after finishing, and then sheet material in the mould is unloaded, and promptly accomplishes the one-time formed manufacturing of high-strength light sandwich wood-plastic composite panel; Wherein the addition of coupling agent is 5% of a thermoplastic powder quality in the step 1; The addition of coupling agent is 5% of a thermoplastic powder quality in the step 2; The addition of AC blowing agent is 1% of a thermoplastic powder quality in the step 2.
The thermoplastic powder adopts high density polyethylene (HDPE) in this embodiment, and coupling agent adopts maleic anhydride grafted polyethylene.
In this embodiment after the one-shot forming breadth of gained high-strength light sandwich wood-plastic composite panel reach 1.22 * 2.44mm, bending strength 35MPa, density is little (to be 0.5～0.8g/cm).
Claims (10)
1. high-strength light sandwich wood-plastic composite panel; Comprise core material (2); It is characterized in that high-strength light sandwich wood-plastic composite panel also comprises upper epidermis material (1) and following skin-material (3); Core material (2) is arranged between upper epidermis material (1) and the following skin-material (3), and fusion pressing between core material (2) and upper epidermis material (1) and the following skin-material (3).
2. a kind of according to claim 1 one-time formed manufacturing approach of high-strength light sandwich wood-plastic composite panel; It is characterized in that the one-time formed manufacturing approach of high-strength light sandwich wood-plastic composite panel carries out according to the following steps: one, with wood powder and thermoplastic powder by weight 60～50: 40～50 mix; Add coupling agent again; Form mixture, mixture is put into high mixer mixing 10min, obtain skin-material; Two, with wood powder and thermoplastic powder by weight 50～30: 50～70 mix, and add coupling agent and AC blowing agent again, form mixture, and mixture is put into high mixer mixing 10min, obtain core material; Three, the two ends in framed are placed finger gauge to control sheet metal thickness are 6～16mm; Four, be that the skin-material of 2～5mm is mated formation in mould as skin-material (3) down with thickness; Lay thickness is the core material (2) of 2～10mm then; Repaving and putting thickness is that the skin-material of 2～5mm is as upper epidermis material (1); Cover the upper cover plate of mould then on framed, obtain completing the mould of blank; Five, completing mould and die preheating to 120～140 ℃ of blank, be transplanted on then in the hot press, is 3～6MPa at pressure, at 180～185 ℃ of condition pressed 6～12min, reduces pressure to 0.3～1.3MPa then, continues hot pressing 2～4min; Six, hot pressing is cooled to 60～75 ℃ of typings after finishing, and then sheet material in the mould is unloaded, and promptly accomplishes the one-time formed manufacturing of high-strength light sandwich wood-plastic composite panel; Wherein the addition of coupling agent is 3%～6% of a thermoplastic powder quality in the step 1; The addition of coupling agent is 3%～6% of a thermoplastic powder quality in the step 2; The addition of AC blowing agent is 0.5%～1.5% of a thermoplastic powder quality in the step 2.
3. the one-time formed manufacturing approach of a kind of high-strength light sandwich wood-plastic composite panel according to claim 2 is characterized in that wood powder mixes by weight 55: 45 with the thermoplastic powder in the step 1.
4. according to claim 2 or the one-time formed manufacturing approach of 3 described a kind of high-strength light sandwich wood-plastic composite panels, it is characterized in that wood powder is 20～80 orders in the step 1, wood powder is 40～120 orders in the step 2, and moisture content is below 3%.
5. the one-time formed manufacturing approach of a kind of high-strength light sandwich wood-plastic composite panel according to claim 4 is characterized in that the said thermoplastic of step 1 is high density polyethylene (HDPE) or high density poly propylene.
6. the one-time formed manufacturing approach of a kind of high-strength light sandwich wood-plastic composite panel according to claim 5 is characterized in that the said coupling agent of step 1 is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene.
7. the one-time formed manufacturing approach of a kind of high-strength light sandwich wood-plastic composite panel according to claim 6, the addition that it is characterized in that coupling agent in the step 1 is 5% of a thermoplastic powder quality.
8. the one-time formed manufacturing approach of a kind of high-strength light sandwich wood-plastic composite panel according to claim 7 is characterized in that the said finger gauge of step 3 scribbles releasing agent.
9. the one-time formed manufacturing approach of a kind of high-strength light sandwich wood-plastic composite panel according to claim 8 is characterized in that completing in the step 5 mould and die preheating to 130 ℃ of blank.
10. the one-time formed manufacturing approach of a kind of high-strength light sandwich wood-plastic composite panel according to claim 9; It is characterized in that in the step 5 at pressure being 5MPa; At 182 ℃ of condition pressed 10min, reduce pressure then to 1MPa, continue hot pressing 3min.
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| CN103341938A (en) * | 2013-06-18 | 2013-10-09 | 东北林业大学 | Preparation method of wood-like wood-plastic composite sheet material |
| CN103818072A (en) * | 2014-01-27 | 2014-05-28 | 鑫盛(湖州)塑木科技有限公司 | Multilayer plastic-wood composite board and preparation method thereof |
| CN104194213A (en) * | 2014-08-14 | 2014-12-10 | 民勤县华安再生资源开发有限公司 | Wood plastic compound engraving plate comprising agricultural plant straws |
| CN104191772A (en) * | 2014-08-14 | 2014-12-10 | 民勤县华安再生资源开发有限公司 | Ecological environment-friendly wood-plastic composite panel for advertisement board and preparation method of panel |
| CN106113808A (en) * | 2016-07-12 | 2016-11-16 | 东北林业大学 | A kind of sound insulation type wood plastic composite and preparation method |
| CN106515150A (en) * | 2016-10-27 | 2017-03-22 | 华南农业大学 | Hot-pressed wood-plastic composite with sandwich structure and manufacturing method thereof |
| CN108715074A (en) * | 2018-04-24 | 2018-10-30 | 华南农业大学 | A kind of PET wood plastic composites with sandwich structure |
| CN109572111A (en) * | 2018-11-19 | 2019-04-05 | 安徽国风木塑科技有限公司 | A kind of three-layer co-extruded Wood-plastic profiles of high rigidity and preparation method thereof |
| CN113619215A (en) * | 2021-08-27 | 2021-11-09 | 东北林业大学 | Sandwich-structure flame-retardant wood-plastic composite material and preparation method thereof |
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| CN103341938A (en) * | 2013-06-18 | 2013-10-09 | 东北林业大学 | Preparation method of wood-like wood-plastic composite sheet material |
| CN103818072B (en) * | 2014-01-27 | 2016-05-25 | 鑫盛(湖州)塑木科技有限公司 | A kind of multilayer wood plastic composite board and preparation method thereof |
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| CN104191772A (en) * | 2014-08-14 | 2014-12-10 | 民勤县华安再生资源开发有限公司 | Ecological environment-friendly wood-plastic composite panel for advertisement board and preparation method of panel |
| CN104191772B (en) * | 2014-08-14 | 2016-06-29 | 民勤县华安再生资源开发有限公司 | A kind of billboard ecological environment-friendly type wood-plastic composite board and preparation method thereof |
| CN104194213A (en) * | 2014-08-14 | 2014-12-10 | 民勤县华安再生资源开发有限公司 | Wood plastic compound engraving plate comprising agricultural plant straws |
| CN106113808A (en) * | 2016-07-12 | 2016-11-16 | 东北林业大学 | A kind of sound insulation type wood plastic composite and preparation method |
| CN106515150A (en) * | 2016-10-27 | 2017-03-22 | 华南农业大学 | Hot-pressed wood-plastic composite with sandwich structure and manufacturing method thereof |
| CN108715074A (en) * | 2018-04-24 | 2018-10-30 | 华南农业大学 | A kind of PET wood plastic composites with sandwich structure |
| CN109572111A (en) * | 2018-11-19 | 2019-04-05 | 安徽国风木塑科技有限公司 | A kind of three-layer co-extruded Wood-plastic profiles of high rigidity and preparation method thereof |
| CN113619215A (en) * | 2021-08-27 | 2021-11-09 | 东北林业大学 | Sandwich-structure flame-retardant wood-plastic composite material and preparation method thereof |
| CN113619215B (en) * | 2021-08-27 | 2022-05-03 | 东北林业大学 | Sandwich-structure flame-retardant wood-plastic composite material and preparation method thereof |
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Application publication date: 20120502 |