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Formed product of fiber-reinforced polypropene resin

A technology of polypropylene resin and shaped products, applied in the field of shaped products, capable of solving problems such as unsatisfactory fatigue characteristics

Inactive Publication Date: 2003-11-12
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement in fatigue properties achieved for molded products made of known compositions is unsatisfactory

Method used

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  • Formed product of fiber-reinforced polypropene resin
  • Formed product of fiber-reinforced polypropene resin
  • Formed product of fiber-reinforced polypropene resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A shaped article was obtained using the pellets obtained in the same manner as in Comparative Example 1, except that the spread of the glass roving was increased to about 1.3 by increasing the tension of the glass roving to be embedded as it entered the crosshead die. times. The intrinsic viscosity [η] of the polypropylene resin in the shaped product, the degree of dispersion of fibers in the shaped product and the fatigue properties of the shaped product were measured in the same manner as in Comparative Example 1, and the results are listed in Table 1. Photo 1 for determination of fiber dispersion figure 1 shown.

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PUM

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Abstract

Disclosed is a formed article made of a fiber-reinforced polypropylene resin comprising from 20 to 95% by weight of a polypropylene resin and from 5 to 80% by weight of fibers, wherein in the formed article the polypropylene has an intrinsic viscosity [eta] of from 1.05 dl / g to 2.00 dl / g, the fibers have a weight average fiber length of from 1 mm to 10 mm, and a degree of dispersion of the fibers is from 0 to 1.2. The formed article is superior in both mechanical strength and fatigue characteristic.

Description

technical field [0001] The present invention relates to a shaped article made of a fiber-reinforced polypropylene resin having excellent mechanical strength and excellent fatigue properties. Background technique [0002] Due to its good plasticity, good chemical resistance and low specific gravity, polypropylene resin is widely used as a general-purpose resin. However, it is not always satisfactory in terms of mechanical strength and heat resistance, so its use is somewhat limited. As a method of improving the defects and improving the mechanical strength of polypropylene resins such as rigidity and impact strength, it is known to incorporate fillers, glass fibers, etc. into the resin. In industrial practice, glass fiber reinforced polypropylene resins have also been produced by mixing short fibers such as chopped strands with polypropylene resins and pelletizing the mixture with a kneader. [0003] However, the fibers used for the above-mentioned short fiber reinforced po...

Claims

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Application Information

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IPC IPC(8): C08K3/40C08L23/10
CPCC08L23/10C08K3/40C08L23/12C08J5/04
Inventor 北野胜久真田隆新健二
Owner SUMITOMO CHEM CO LTD
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