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Polyolefin/vegetable fiber composite material and preparation method thereof

A plant fiber and composite material technology, which is applied in the field of polyolefin modification technology and the field of comprehensive utilization of plant fibers, can solve the problems of increasing the production cost of composite materials, reducing the tensile strength and modulus of composite materials, etc., and achieves low cost and improved Interfacial interaction, the effect of simple preparation method

Inactive Publication Date: 2011-05-25
成都芝田高分子材料有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0006] Although elastomer toughening wood-plastic composites including polyolefin / plant fiber composites can improve the impact properties of composites, the introduction of elastomers usually reduces the tensile strength and modulus of composites to a certain extent. , at the same time, the use of elastomers also increases the production cost of composite materials to a certain extent

Method used

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  • Polyolefin/vegetable fiber composite material and preparation method thereof

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preparation example Construction

[0027] Ⅰ The preparation method of polyolefin / plant fiber composite material:

[0028] (1) Screening and drying of plant fibers. In Examples 1 to 8, after the plant fibers are sieved through a 60-mesh sieve, the moisture content is lower than 2% by drying treatment, and then set aside;

[0029] (2) Preliminary mixing of raw materials. Mix the dried plant fibers and processing aids in the high-speed mixer for 5 minutes; turn on the high-speed mixer, add the polyolefin resin and functional modified masterbatch with the formula, and mix again at high speed for 3 minutes;

[0030] (3) Extrusion granulation of composite materials. In the twin-screw extruder, the primary mixed material is extruded and granulated. The temperature of the extruder is set at 160-200°C, and the screw speed of the extruder is 80rpm-120rpm. After the extruded material passes through the die, it enters the profile Styling equipment, cooling, cutting, stacking, that is, polyolefin / plant fiber composites w...

Embodiment 1～8

[0033] Below provide 10 embodiments of specific formula composition and component content, the preparation method of the polyolefin / plant fiber composite material of indication is carried out by the step that 1 provides. Example 9 and Example 10 for comparison do not contain the functional modified masterbatch provided by the present invention.

Embodiment 1

[0034] Embodiment 1: by weight: 30 parts of polyethylene resin, 70 parts of rice straw powder; functional modified masterbatch is 10% of the total weight of polyethylene resin and straw powder; processing aid is the total weight of polyethylene resin and straw powder 4% by weight; in the functional modified masterbatch, 25% of oxidized polyethylene, 20% of talcum powder and 55% of nanometer calcium carbonate are contained.

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Abstract

The invention discloses a polyolefin / vegetable fiber composite material and a preparation method thereof. The composite material consists of polyolefin, vegetable fibers, functional modified parent stock and a processing assistant, wherein the weight percentage of the polyolefin is 20 to 60 percent; the weight percentage of the vegetable fibers is 40 to 80 percent; the weight of functional modified parent stock is 5 to 15 percent based on the total weight of the polyolefin and the vegetable fibers; and the weight of the processing assistant is 2 to 5 percent based on the total weight of the polyolefin and vegetable fibers. The preparation method of the composite material comprises: strictly drying the vegetable fibers, fully mixing the dried vegetable fibers and the processing assistant in equipment such as a high-speed mixer; blending the mixture with polyolefin particle materials and the functional modified parent stock, performing extruding granulation, and obtaining the composite material. Compared with the conventional polyolefin / vegetable fiber composite material, the composite material is obviously improved in impact toughness while retaining strength and modulus, and the application range of the polyolefin / vegetable fiber composite material is further enlarged.

Description

technical field [0001] The invention belongs to the technical field of polyolefin modification and the field of comprehensive utilization of plant fibers, and in particular relates to a formula of polyolefin / plant fiber composite material and products and a preparation method thereof. Background technique [0002] Using wood fiber fillers (including wood powder, straw, rice husk, etc.) and thermoplastics (including waste thermoplastics) as the main raw materials, plus some processing aids, the composite material obtained through molding processing is called wood-thermoplastics. Composite materials (Wood Plastic Composites, also referred to as WPC). Polyolefin / plant fiber composites are one of them. Wood-plastic composites, including polyolefin / plant fiber composites, have better performance than individual wood materials or plastic products, and are ideal substitutes for wood. Their main advantages are: no defects of wood products, such as wood knots Scars, oblique grains,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L23/30C08K3/34C08K3/26
Inventor 赵波
Owner 成都芝田高分子材料有限公司
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