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Wood plastic composite material veneering plywood and manufacturing method and application thereof

A technology of wood-plastic composite materials and veneered plywood, which is applied in the direction of wood layered products, chemical instruments and methods, and on-site preparation of building components. and other issues, to achieve the effect of reducing labor intensity, shortening the construction period, and having a protective effect

Inactive Publication Date: 2015-06-17
NORTHEAST FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the wooden plywood prepared by the existing method is easy to expand the mold during use, difficult to demould, the number of times of turnover is small, and the wood-plastic composite board is difficult to be used as a building formwork alone, and to provide a wood plywood Plastic composite veneer plywood and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0030] Embodiment 1: This embodiment is a wood-plastic composite veneer plywood prepared from wood-plastic composite sheets, non-woven fabrics, wood plywood and adhesives.

[0031] The advantages of this embodiment: 1. The wooden plywood veneered by the wood-plastic composite material obtained in this embodiment is used as a building formwork, and the surface energy of the polyolefin layer on the surface of the wood-plastic composite material is low, and the coefficient of thermal expansion is greatly different from that of concrete. As the temperature drops and the concrete solidifies, the wood-plastic composite veneer plywood is easy to separate from the concrete, and can be removed gently without beating, which reduces the labor intensity;

[0032] 2. The surface of the concrete is smooth and beautiful. After pouring, it can meet the requirements of the clean water wall, minus the secondary plastering process of the wall, and can be directly veneered for decoration, reducing...

specific Embodiment approach 2

[0036] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the wood-plastic composite sheet is prepared according to the following steps:

[0037] Step 1. Weigh 30 to 100 parts of thermoplastics, 20 to 200 parts of plant fiber powder, 20 to 100 parts of inorganic filler, 3 to 10 parts of coupling agent, and 1 to 4 parts of lubricant in parts by mass agent, 1-4 parts of color masterbatch and 3-10 parts of other fillers, and then put the weighed thermoplastics, plant fiber powder, inorganic fillers, coupling agents, lubricants, color masterbatches and other fillers into Perform premixing in a high-speed mixer, control the temperature at 25°C to 150°C, and premix for 5 minutes to 20 minutes, then cool naturally to obtain a premix;

[0038] Step 2, extruding the premixed material in an extruder to obtain a wood-plastic composite sheet with a thickness of 0.5 mm to 5 mm;

[0039] The extrusion molding described in step 2 includes the following two methods. ...

specific Embodiment approach 3

[0048] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the raw material of the non-woven fabric is polypropylene, polyethylene, polyethylene terephthalate, polyurethane and polychlorinated One or more combinations of ethylene, the thickness of the non-woven fabric is 0.01 mm to 0.5 mm; the wood plywood is an outdoor grade aging-resistant plywood. Other steps are the same as those in Embodiment 1 or 2.

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PUM

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Abstract

The invention relates to plywood and a manufacturing method of the plywood, and discloses wood plastic composite material veneering plywood and a manufacturing method and application of the wood plastic composite material veneering plywood. The wood plastic composite material veneering plywood aims to solve the problems that when wooden plywood manufactured according to an existing method is used, a die swells easily, the die is released difficultly, the number of turnover using times is small, and the wood plastic composite board cannot be easily used as a building formwork independently. The wood plastic composite material veneering plywood is formed by a wood plastic composite sheet, a non-woven fabric, wood plywood and adhesives in a manufactured mode. The manufacturing method comprises the steps that the wood plastic composite sheet is manufactured; a non-woven fabric cladding wood plastic composite material is manufactured; the plywood is preprocessed; the adhesives are coated; pre-pressing is carried out; hot pressing is carried out. The wood plastic composite material veneering plywood can be used as the building formwork. The wood plastic composite material veneering plywood has the advantages that the formwork and concrete are separated easily, a casting surface is flat and smooth, and labor intensity of die unloading is relieved; the number of turnover using times of the formwork is improved to be 50-70; weight is light and intensity is high.

Description

technical field [0001] The invention relates to a plywood and a preparation method thereof. Background technique [0002] Building formwork is an important construction tool in the current cast-in-place concrete structure engineering. Wooden building formwork is popular among domestic and foreign builders and contractors due to its large format, few seams, light weight, easy processing, and good overall rigidity. of favor. However, due to the characteristics of the material itself, the wooden building formwork is easy to swell and demould during use, and the number of turnovers is usually only about 10 times. [0003] Wood-plastic composite (WPC) is a composite material processed from wood fibers and thermoplastics. Its raw materials can be waste wood, crop straw, bamboo, hemp chips and other biomass fibers, recycled polyethylene, polypropylene, polychloride Thermoplastics such as ethylene provide a good way for waste recycling. As a new type of green composite material, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B21/04B32B21/10B32B37/10C08L97/02E04G9/02
Inventor 王伟宏王海刚吴彬郭丽敏黄浪王清文
Owner NORTHEAST FORESTRY UNIVERSITY
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