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Long-carbon-fiber-reinforced resin molding and process for producing the same

A technology of resin molding and manufacturing method applied to the field of carbon fiber reinforced resin molded products

Inactive Publication Date: 2010-01-27
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this method is adopted, the mechanical properties of the molded product can be significantly improved compared with the conventionally disclosed molded products, but there is still a demand for further improvement of the physical properties.

Method used

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  • Long-carbon-fiber-reinforced resin molding and process for producing the same
  • Long-carbon-fiber-reinforced resin molding and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] The channel of the continuous fiber was processed into a corrugated crosshead, and the carbon fiber roving treated with the above-mentioned sizing agent was stretched, and 10% by weight of the above-mentioned acid-modified polypropylene and the above-mentioned polypropylene were supplied from an extruder connected to the crosshead. Acid group-containing polyolefin resin (acid content: 0.1% by weight) of a mixture of 90% by weight of propylene, impregnated into carbon fibers in a molten state (260°C), and then passed through a shaping die in the form of strands Pulling out and chopping gave pellets with a carbon fiber content of 40% by weight and a length of 11 mm.

[0102] The resulting pellets were injection molded at a molding temperature (cylinder temperature) of 250° C. into ISO multipurpose test pieces, and their physical properties were measured. The results are shown in Table 1.

Embodiment 2～10

[0104] Proceed in the same manner as in Example 1, except that the carbon fiber concentration, particle length, and barrel temperature are changed to the values ​​shown in Table 1. The results are shown in Table 1.

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Abstract

A long-carbon-fiber-reinforced polyolefin resin improved in strength, etc. A molded article is provided which is obtained by injection-molding long-carbon-fiber-reinforced resin pellets obtained by infiltrating an acid-group-containing polyolefin resin (A) into carbon fibers whose surface has been treated with a sizing agent (s) having a functional group reactive with the acid group. The injection molding is conducted while regulating the injection molding machine so as to have a cylinder temperature of 250-300 DEG C.

Description

technical field [0001] The present invention relates to a carbon fiber-reinforced resin molded article reinforced with carbon long fibers and having significantly enhanced mechanical strength, and a method for producing the same. Background technique [0002] As a method of increasing the strength of polyolefin, a method of blending reinforcing fibers is known, and fiber-reinforced polyolefin resin compositions are usually produced by mixing polyolefin and short fibers such as chopped strands and extruding them with an extruder . If this method is adopted, there is an advantage that a fiber-reinforced polyolefin resin composition having a considerably high mechanical strength can be obtained extremely easily. However, in recent years, resins tend to be required to have higher mechanical strength, and the above-mentioned method for producing a fiber-reinforced resin composition cannot avoid breakage of fibers during kneading in an extruder, and cannot meet this requirement. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/78B29C45/62B29K23/00B29K105/06
CPCB29C45/78B29C45/74B29C2945/76531B29C2945/76668B29K2105/06B29C45/0001
Inventor 片山昌广
Owner DAICEL CHEM IND LTD