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Preparation method of green and environment-friendly flame-retardant wood-plastic plate

A green and environmentally friendly, wood-plastic board technology, applied in the direction of flat products, wood processing appliances, other household appliances, etc., can solve the problems of consumption of petrochemical products, low performance, increased production costs, etc., to meet the requirements of combustion performance, technology Simple process and fast effect

Pending Publication Date: 2022-07-29
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of adhesive has high bonding strength, there are still many problems: first, formaldehyde series adhesives will release harmful gases such as free formaldehyde during production and use, which greatly endangers environmental safety and human health; second, most synthetic polymer adhesives pass The synthesis of non-renewable petroleum, natural gas and other pyrolysis monomers consumes a large amount of petrochemical products, while the production cost also increases, and most of these polymers cannot be degraded
However, its performance in terms of adhesion and water resistance is not high, which limits its application in the field of wood-plastic panel processing.

Method used

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  • Preparation method of green and environment-friendly flame-retardant wood-plastic plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh high amylose corn starch (amylose content 70%) and mix it with wood flour evenly, and the mass ratio is 6:14.

[0029] (2) Weigh calcium chloride solid, add it to water, and configure 40% calcium chloride solution.

[0030] (3) Add solution (2) to the mixed powder of (1) in a mass ratio of 20:3, and stir evenly.

[0031] (4) Spread the wet powder in (3) evenly in a metal mold of 10cm×10cm×1mm.

[0032] (5) The metal mold in (4) was placed on a hot press molding machine, the temperature was set to 105° C., the clamping pressure was 5 MPa, and the pressure holding time was 10 minutes.

[0033] (6) After the mold is cooled, take it out to obtain a wood-plastic board with a thickness of 1 mm.

[0034] (7) The tensile and bending properties of the wood-plastic board in (6) were measured. The tensile strength was 3.5MPa, the static bending strength was 26.5MPa, and the surface hardness was 90HC.

[0035] (8) Determination of the flame retardant properties of the ...

Embodiment 2

[0038] (1) Weigh high amylose corn starch (amylose content 50%) and mix it with wood flour evenly, and the mass ratio is 3:17.

[0039] (2) Weigh 30 g of calcium chloride solid, add it to 70 g of water, and configure a 30% calcium chloride solution.

[0040] (3) Add the solution (2) to the mixed powder of (1) in a mass ratio of 20:3, and stir evenly.

[0041] (4) Spread the wet powder in (3) evenly in a metal mold of 10cm×10cm×1mm.

[0042] (5) The metal mold in (4) was placed on a hot press molding machine, the temperature was set to 105° C., the clamping pressure was 5 MPa, and the pressure holding time was 10 minutes.

[0043] (6) After the mold is cooled, take it out to obtain a wood-plastic board with a thickness of 1 mm.

[0044] (7) The tensile and bending properties of the wood-plastic board in (6) were measured. The tensile strength was 1.5MPa, the bending stress was 17.2MPa, and the surface hardness was 90HC.

[0045] (8) Determination of the flame retardant prope...

Embodiment 3

[0047] (1) Weigh high amylose corn starch (amylose content 50%) and mix it with wood flour evenly, and the mass ratio is 3:17.

[0048] (2) Weigh calcium chloride solid, add it to water, and configure 40% calcium chloride solution.

[0049] (3) Add solution (2) to the mixed powder of (1) in a mass ratio of 20:10, and stir evenly.

[0050] (4) Add the wet powder in (3) into an injection molding machine, and at a processing temperature of 95° C., extrude and inject into a wood-plastic board with a thickness of 3 mm.

[0051] (5) Determine the tensile and bending properties of the wood-plastic board in (4), the tensile strength is 5.5MPa, the static bending strength is 35MPa, and the surface hardness is 98HC.

[0052] (6) Determination of the flame retardant properties of the wood-plastic board in (4). According to GB / T 2408-2008 Test Method B-Vertical Burning Test, the after-flame time of a single sample after the first application of flame is 0 seconds, and the after-flame ti...

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Abstract

The invention belongs to the technical field of manufacturing of flame-retardant wood-plastic plates, and discloses a preparation method of a green and environment-friendly flame-retardant wood-plastic plate. The method comprises the following steps: S1, uniformly mixing high amylose with wood flour; s2, adding a calcium chloride solution into the mixed powder prepared in the step S1, and uniformly stirring; and S3, adding the wet powder obtained in the step S2 into a hot-press forming machine or an injection molding machine, carrying out hot-press forming or injection molding, and then cooling to obtain the environment-friendly flame-retardant wood-plastic plate. The production process of the product is green and environment-friendly, no three wastes are generated, and the environment is not polluted; a starch-based adhesive is used in the production of the wood-plastic plate, and a formaldehyde resin adhesive is abandoned, so that no formaldehyde is released when the wood-plastic plate is used; and the third wood-plastic plate contains flame-retardant components, so that the wood-plastic plate has a flame-retardant function.

Description

technical field [0001] The invention belongs to the technical field of manufacture of flame-retardant wood-plastic boards, in particular to a preparation method of a green and environment-friendly flame-retardant wood-plastic board. Background technique [0002] Wood-plastic board is a kind of material obtained by blending pretreated lignocellulose or wood powder with thermoplastic resin binder and molding by extrusion, molding or injection molding process. It can be widely used in household industry, indoor Decoration, packaging and future wooden house construction. According to the requirements for the combustion performance of interior decoration materials in the "Code for Fire Protection Design in Building Interior Decoration" (GB 50222-2017), the combustion performance should not be lower than B1 level. Since wood materials are flammable, the occurrence and spread of many fires are related to wood materials, posing a great threat to the safety of people's lives and pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/08B27N3/00C09J103/02C09J11/04C09J11/08
CPCB27N3/08B27N3/002C09J103/02C09J11/04C09J11/08C08K2003/162C08L97/02C08K3/16
Inventor 陆雨
Owner GUANGZHOU UNIVERSITY
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