Wood-plastic composite and preparation method for special-shape molded member thereof

A technology of wood-plastic composite materials and pressed parts, which is applied in the field of wood-plastic composite material processing, can solve problems such as limiting the application range of wood-plastic composite materials, poor mechanical properties of wood-plastic composite materials, and inability to meet high-thickness requirements, and achieve a good market Application prospects, good application prospects, and the effect of improving resource utilization

Inactive Publication Date: 2016-06-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this molding method will cause uneven mixing, and the wood-plastic door panel is a flat surface with a relatively simple shape.
[0005] The Chinese patents whose publication numbers are CN102140255A, CN102181167A and CN103772805A have solved the problem of inhomogeneous mixing in the above-mentioned molding method. Wood powder, plastic resin and various processing aids are first mixed in a high-speed mixer to obtain a mixture, and then mixed in a high-speed mixer. Mixing in a two-roll mill/plastic mixer, and finally molding to obtain wood-plastic composite materials
However, in the above-mentioned patents, wood powder is used as a raw material, and wood powder has fluidity, which only plays a role of "filling" and not "strengthening" the wood-plastic composite material, so the mechanical properties of the wood-plastic composite material are relatively

Method used

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  • Wood-plastic composite and preparation method for special-shape molded member thereof
  • Wood-plastic composite and preparation method for special-shape molded member thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this embodiment, the special-shaped molded wood-plastic product is a storage box with a format size of 500mm×500mm and a height of 100mm. The preparation method of the special-shaped molded wood-plastic product is as follows:

[0047] It is configured according to the following mass percentage raw materials:

[0048] The following are the specific production steps:

[0049] (1) Drying treatment

[0050] Select 820g of wood fiber with a length of 0.1-4.0mm and an aspect ratio of 10:1-100:1, and use a drum dryer to dry the wood fiber raw material, and control its moisture content at 5% to remove wood fiber. Moisture increases the interfacial compatibility between wood fiber and waste plastics;

[0051] (2) High speed mixing

[0052]Add the wood fiber, waste plastic polyethylene, coupling agent, lubricant, inorganic filler, color masterbatch and other functional additives after step (1) into the high-speed mixer according to the following mass percentage, and mix eve...

Embodiment 2

[0069] In this embodiment, the shape and format size of the special-shaped molded wood-plastic product are the same as those in Example 1. The preparation method of the special-shaped molded wood-plastic product is as follows:

[0070] (1) Drying treatment

[0071] Select 525g of wood fiber raw materials with a length of 0.1-4.0mm and an aspect ratio of 10:1-100:1, and use a blower dryer to dry the wood fiber, and control its moisture content at 4% to remove wood fiber. Moisture increases the interfacial compatibility between wood fiber and waste plastics;

[0072] (2) High speed mixing

[0073] Add the wood fiber, waste plastic polyethylene, coupling agent, lubricant, inorganic filler, color masterbatch and other functional additives after step (1) into the high-speed mixer according to the following mass percentage, and mix evenly to prepare the mixture. The temperature is controlled at 105°C and mixed at high speed for 15 minutes:

[0074] Wood fiber 61%

[0075] Waste...

Embodiment 3

[0090] In this embodiment, the shape and format size of the special-shaped molded wood-plastic product are the same as those in Example 1. The preparation method of the special-shaped molded wood-plastic product is as follows:

[0091] (1) Drying treatment

[0092] Choose 755g of special-shaped wood fiber raw materials with a length of 0.1-4.0mm and an aspect ratio of 10:1-100:1, and use a drum dryer to dry the wood fiber, and control its moisture content at 5% to remove wood fiber. Moisture increases the interfacial compatibility between wood fiber and waste plastics;

[0093] (2) High speed mixing

[0094] Add wood fibers treated in step (1), waste plastic polyethylene and polypropylene, coupling agent, lubricant, inorganic filler, color masterbatch and other functional additives into a high-speed mixer according to the following mass percentages, and mix evenly to obtain For the mixture, the temperature is controlled at 110°C and mixed at high speed for 10 minutes:

[0...

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Abstract

The invention provides a wood-plastic composite. The wood plastic composite comprises a biomass material and a plastic; the biomass material is wooden fiber with a length of 0.1 to 4.0 nm and a length-diameter ratio of 1: 1 to 400: 1; and in virtue of the characteristic of the large length-diameter ratio and low possibility of flowing of the wooden fiber, filling effect and reinforcing effect are exerted on the wood plastic composite, so the mechanical properties of the wood plastic composite are substantially improved and in particular, resistance to impact and creep and other performance of the wood plastic composite are improved, which enables the application scope of the wood plastic composite to be broadened. When a molding process is employed for preparation of the molded member of the wood plastic composite, the thickness and mechanical properties of the molded member can be improved and preparation of the special-shape molded member can be realized; and the advantages of low cost and good market application prospect are obtained.

Description

technical field [0001] The invention belongs to the technical field of processing wood-plastic composite materials, and in particular relates to a method for preparing wood-plastic composite materials and special-shaped molded parts thereof. Background technique [0002] Wood-plastic composite material is a kind of composite material made of agricultural and forestry biomass resources and plastic as the main raw material. It has the advantages of both wood and plastic. Its products are mainly used as substitutes for wood or plastic. The development and application of wood-plastic composite materials are of great significance in the comprehensive utilization of waste, environmental protection and relief of the increasing pressure on natural wood. [0003] At present, there are three main methods of producing wood-plastic composite materials: extrusion, injection and molding. Injection molding can realize the production of wood-plastic composite materials with low wood conten...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L27/06C08L55/02C08L69/00C08K13/02C08K3/26C08K3/36C08K3/34C08K5/098C08K5/09B29C47/92B29C43/58B29C48/92
Inventor 张安将赵永青徐婷韩振薛立新
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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