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Natural fiber-reinforced polyurethane elastomer composite material and preparation method thereof

A polyurethane elastomer and natural fiber technology, which is applied in the field of degradable composite materials, natural fiber reinforced polyurethane elastomer (UE) composite materials and its preparation, can solve the problem of low strength of composite materials, performance not meeting requirements, product surface Unevenness and other problems, to achieve the effect of good impact strength and tensile strength, smooth surface, and improved impact strength

Active Publication Date: 2013-10-30
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, the first object of the present invention is to provide a natural fiber reinforced polyurethane elastomer (UE) composite material to solve the problem that the strength of the composite material obtained by natural fiber reinforced ordinary thermoplastics in the prior art is relatively low. Low, the performance cannot meet the requirements
[0006] The second purpose of the present invention is to provide a method for preparing the above-mentioned natural fiber reinforced polyurethane elastomer (UE) composite material, so as to solve the uneven surface of the product caused by glass fiber brought into the surface of the product during the traditional glass fiber and polyurethane elastomer casting process And the problem of low strength of the obtained product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preheat the mold of the shape of the automobile interior panel that you want to make to 40°C. The preheating of the mold will help reduce the viscosity of the mixture of reactants A and B, so that the polyurethane reactants A and B that enter The viscosity of the mixture is reduced, the fluidity is good, and the impregnation effect of the natural fiber mat and the mixture is good; a continuous jute natural fiber mat with a thickness of 0.5 mm is selected, and the natural fiber mat is fed into the top of the mold through a continuous conveyor belt and cut into mold shapes The size of the fiber mat is then fed into the preheated mold; the two reaction raw materials A component and B component (where A component is polyethylene oxide glycol 1000 (Shanghai) with a weight ratio of 100:0.1:5 Haoyi Chemical Technology Co., Ltd.), dibutyltin dilaurate (model 101), 1,4-butanediol (Sinopharm); component B is diphenylmethane-4,4ˊ-diisocyanate TDI; groups A and B The composition we...

Embodiment 2

[0043]Select a continuous sisal natural fiber mat with a thickness of 0.6 mm; preheat the mold of the shape of the automotive interior panel that you want to make to 45 ° C, and the preheating of the mold helps to reduce the mixture of reactants A and B components. Viscosity, so that the viscosity of the mixture of components A and B of the thermoplastic polyurethane reactant that enters is reduced, the fluidity is good, and the impregnation effect of the natural fiber mat and the mixture is good; the natural fiber mat is sent to the top of the mold through a continuous conveyor belt, and cut into The fiber felt of the shape and size of the mold is then sent into the preheated mold; the two reaction raw materials A component and B component (wherein A component is polytetrahydrofuran glycol 1000 with a weight ratio of 100:0.2:6 ( PTMEG1000, Shanghai Haoyi Chemical Technology Co., Ltd.), stannous octoate, 3,3′-dichloro-4,4′-diamino-diphenylmethane; B component is diphenylmethane...

Embodiment 3

[0046] Preheat the mold of the shape of the car interior panel to be made to 50°C. The preheating of the mold will help reduce the viscosity of the mixture of reactants A and B, so that the entering thermoplastic polyurethane reactants A and B The viscosity of the divided mixture is reduced, the fluidity is good, and the impregnation effect of the natural fiber felt and the mixture is good; the continuous hemp natural fiber felt with a thickness of 0.8 mm is selected, and the natural fiber felt is sent to the top of the mold through a continuous conveyor belt, and cut into The fiber felt of the shape and size of the mold is then sent into the preheated mold; the two reaction raw materials A component and B component (where A component is polyoxypropylene glycol with a weight ratio of 100:0.1:6 ( PPG1000, Shanghai Kabite Chemical Co., Ltd.), triethanolamine, trimethylolpropane; B component is diphenylmethane-4,4ˊ-diisocyanate TDI; the composition ratio of A and B component raw m...

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Abstract

The invention discloses a natural fiber-reinforced polyurethane elastomer composite material. The natural fiber-reinforced polyurethane elastomer composite material is prepared from the following components in parts by weight: 30-70 parts of natural fibers and 70-30 parts of polyurethane elastomers, wherein the natural fibers are selected from jute, sisal, hemp, flax and ramie, and the polyurethane elastomers are selected from hard polyurethane elastomers, soft polyurethane elastomers or half-hard polyurethane elastomers. The invention further discloses a preparation method of the natural fiber-reinforced polyurethane elastomer composite material. According to the natural fiber-reinforced polyurethane elastomer composite material and the preparation method, as the degradable natural fiber is taken as the raw material, the environmental protection is benefited; and the raw materials of a component A and a component B of liquid polyurethane are mixed to soak a natural fiber felt and then the natural fiber felt is cured and formed, so that the problem of the uneven surface of a product, caused in the conventional pouring process of the glass fibers and the polyurethane elastomers, is overcome, and the prepared composite material has the characteristics that the abrasive resistance is good and the shock strength is improved and can be used for replacing the conventional glass fiber-reinforced composite material to be used in automotive interior decoration parts.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a natural fiber reinforced polyurethane elastomer (UE) composite material and a preparation method thereof, which is a degradable composite material suitable for automotive interior decoration. Background technique [0002] The current automotive interior panels are mainly fiber-reinforced thermoplastic resin composite materials, and most of the fibers used are glass fibers. Glass fiber-reinforced composite materials have low cost and high strength, but glass fiber-reinforced composite materials have poor impact performance and there are During the casting process of glass fiber and polyurethane elastomer, the glass fiber is brought into the surface of the product to cause the uneven surface of the product. At the same time, the glass fiber is not easy to degrade, which is not conducive to environmental protection. Due to the increasing requirements of the society for t...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L97/02C08G18/76C08G18/66C08G18/48
Inventor 邓丽莉解廷秀刘密密
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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