Automobile bumper material and preparation method thereof

A technology for automobile bumpers and plant fibers, applied in the field of polypropylene, plant fiber modified materials and their preparation, can solve the problems that glass fibers are difficult to degrade and cannot be recycled, and achieve the effect of low cost and abundant resources

Inactive Publication Date: 2012-07-11
刘文富
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing special material systems for bumpers include PP / EPDMj talcum powder blending system, PP / PE / POEjEPR blending system, PP / CPP / POE / wollastonite blending modification system, etc., among which glass fiber is difficult to be degraded , not recyclable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of automobile bumper material is characterized in that: comprises the following steps:

[0024] ①Put the plant fiber into sodium hydroxide solution for surface treatment, and the bamboo fiber is the thick bamboo fiber obtained by mechanically extruding and screening the bamboo;

[0025] ② Mix the raw materials evenly: mix polypropylene, saturated ethylene-octene copolymer, polypropylene grafted maleic anhydride copolymer, unsaturated polyester resin (orthophthalic polyester resin, isophthalic polyester resin, Bisphenol A polyester resin and vinyl ester resin, any one of these four resins is selected or any combination of several kinds) and treated plant fibers (hemp fiber and bamboo fiber, any of these two fibers Select one of them or mix them according to the proportion) and mix them evenly in the mixer;

[0026] 3. Add calcium sulfate whiskers: add calcium sulfate whiskers from the side addition port of the twin-screw extruder;

[0027...

Embodiment 1

[0031] Mix 23 parts of polypropylene, 9 parts of saturated ethylene-octene copolymer, 10 parts of polypropylene grafted maleic anhydride copolymer, 35 parts of unsaturated polyester resin, and 8 parts of plant fiber in a mixer, and mix 15 parts of sulfuric acid Calcium whiskers are added from the side of the twin-screw extruder, wherein the long diameter of calcium sulfate whiskers is 50um, the diameter is 4um, and the grafting ratio of maleic anhydride in polypropylene grafted maleic anhydride copolymer is 1%. , The melt flow rate is greater than 100g / lOmin, the polyester resin is bisphenol A polyester resin and vinyl ester resin, the ratio is: 1:1, the plant fiber is hemp fiber and bamboo fiber, the ratio is: 1:1, Then, the blend was mixed in a twin-screw extruder, the temperature of the twin-screw extruder was set at 190° C., and the rotation speed was 330 r / min, extruded and granulated, and finally a special material for automobile bumpers was obtained.

Embodiment 2

[0033] Mix 20 parts of polypropylene, 19 parts of saturated ethylene-octene copolymer, 8 parts of polypropylene grafted maleic anhydride copolymer, 32 parts of unsaturated polyester resin, and 6 parts of plant fiber in a mixer, and mix 15 parts of sulfuric acid Calcium whiskers are added from the side of the twin-screw extruder, wherein the long diameter of calcium sulfate whiskers is 50um, the diameter is 4um, and the grafting ratio of maleic anhydride in polypropylene grafted maleic anhydride copolymer is 1%. , The melt flow rate is greater than 100g / lOmin, the polyester resin is o-phthalic polyester resin, isophthalic polyester resin, the ratio is: 1:1, the plant fiber is hemp fiber, and then the blend is extruded in a twin-screw Mixing in the extruder, the temperature of the twin-screw extruder is set at 200°C, the rotation speed is 330r / min, extruded and granulated, and finally the special material for automobile bumper is obtained.

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Abstract

The invention provides an automobile bumper material and a preparation method thereof. The automobile bumper material comprises the following components by weight: 20% to 45% of polypropylene, 8% to 20% of saturated ethylene octene copolymer, 15% to 25% of calcium sulfate whisker, 8% to 12% of polypropylene grafted maleic anhydride copolymer, 32% to 45% of unsaturated polyester resin and 6% to 25% of plant fiber. The preparation method includes first evenly mixing materials except the calcium sulfate whisker in a mixing machine according to proportion, then adding the calcium sulfate whisker, extruding out the obtained materials and conducting cooling and pelleting on the materials. By modification of the materials, system impact strength is improved. The calcium sulfate whisker is adopted as the reinforcing material to improve composite body strength and simultaneously reduce molding shrinkage of products. The unsaturated polyester resin and the plant fiber are adopted to conduct infiltration and integration to reduce the weight of a bumper and effectively reduce pollution of waste of the bumper to the environment.

Description

technical field [0001] The invention belongs to the field of automobile bumpers, and in particular relates to a polypropylene, a plant fiber modified material and a preparation method thereof. Background technique [0002] Automobile bumper is a thin-walled large-scale structural part with large surface area and complex shape. It not only requires excellent high and low temperature impact toughness, rigidity, aging resistance, heat resistance, cold resistance, but also oil and lubricating oil resistance. , paint and other properties. The most important of which is to have high light weight, impact toughness and good processing flow properties. [0003] Polypropylene (PP) has the advantages of low density, easy molding and processing, and recyclability. Its application in automobiles is increasing, especially in the preparation of automobile bumpers. It is the largest amount of plastics used in automobiles and has the fastest development speed. types of plastic. However, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L23/12C08L23/08C08L51/06C08L97/02C08K7/08B29B9/06B29C47/92B60R19/03B29C48/92
CPCB29C48/04B29C48/40B29C48/911B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 王婷
Owner 刘文富
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