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Carbon fiber-reinforced plastic material with nanofiller mixed therein, and production method therefor

A technology for reinforced plastics and nano-fillers, applied in the field of carbon fiber reinforced plastic materials and their manufacturing, can solve the problems of impaired surface smoothness of materials, plastic characteristic ductility, impaired molding processability, and reduced uniformity of carbon fiber dispersion state, etc. Achieve excellent rigidity and elasticity, and improve heat resistance

Inactive Publication Date: 2014-09-17
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of carbon particles in the polyamide resin composition disclosed in Patent Document 1 is 0.5 to 10 parts by mass, and cannot be applied, for example, to a process of highly filling plastic with chopped carbon fibers (chopped CF)
In CFRP, if the filling amount of carbon fiber exceeds 40% by weight, the uniformity of the carbon fiber dispersion state is significantly reduced, so not only the ductility and moldability that are characteristic of plastics are significantly impaired, but also the smoothness of the material surface, etc. damaged

Method used

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  • Carbon fiber-reinforced plastic material with nanofiller mixed therein, and production method therefor
  • Carbon fiber-reinforced plastic material with nanofiller mixed therein, and production method therefor
  • Carbon fiber-reinforced plastic material with nanofiller mixed therein, and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0078] In this example, polyamide 6 (manufactured by Unitika Co., Ltd., M1040) was used as the polymer material. SIGRAFIL C30S006PUT manufactured by SGL Carbon was used as the carbon fiber. In addition, polyamide 6 was first made to contain 30% by mass of carbon fibers, and a commercially available Pyrofil Pellet (N6MR-C-30B) manufactured by Mitsubishi Rayon Corporation was also used as a comparison. Mica (manufactured by CO-OP CHEMICAL CO., LTD., SOMASIF MEE) was used as the nanofiller. The mixing ratio of each carbon fiber reinforced plastic material is polyamide 6:carbon fiber:mica=70:30:5.

[0079] The polyamide 6, carbon fibers and mica were dried at 80° C. (under vacuum) for at least 12 hours before compounding. The carbon fiber reinforced plastic raw material with the above mixing ratio was added to the high shear molding machine HSE3000mini manufactured by Imoto Manufacturing Co., Ltd. (Japan), at 240°C to 250°C, the speed of the internal reciprocating screw was 300r...

Embodiment 4～5

[0081] As an example, clay (Cloisite 30B manufactured by Southern Clay Products) was used instead of mica as the nanofiller. Other conditions are the same as in Example 1, so detailed description is omitted. In addition, the rotation speed of the screw was 300 rpm (Example 4) and 900 rpm (Example 5), and it melt-kneaded for 1 minute, respectively.

Embodiment 6

[0084] (Example 6, Comparative Example 2)

[0085] In this example, polyamide 610 (manufactured by Toray, AMILAN CM2001) was used as the polymer material. SIGRAFIL C30 S006 PUT manufactured by SGL Carbon was used as the carbon fiber. Mica (manufactured by CO-OP CHEMICAL CO., LTD., SOMASIF MEE) was used as the nanofiller. The mixture ratio of each carbon fiber reinforced plastic raw material is polyamide 610:carbon fiber:mica=70:30:5. In addition, as Comparative Example 2, a material having a composition of polyamide 610:carbon fiber=70:30 to which no nanofiller was added was used. The screw rotation speed was 900 rpm, and each was melt-kneaded for 1 minute.

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Abstract

Provided is a carbon fiber-reinforced plastic material having superior hardness, flexibility, and improved heat resistance, and a production method therefor. The present invention provides a carbon fiber-reinforced plastic material in which: a total of 100 parts by mass comprising 30-90 parts by mass of a polymeric material and 70-10 parts by mass of carbon fibers contain 2-30 parts by mass of a nanofiller; and the average aspect ratio (length / width) of the nanofiller is 20 or higher. The average aspect ratio (length / width) of the nanofiller may also be 50 or higher.

Description

technical field [0001] The present invention relates to carbon fiber reinforced plastic material and its manufacturing method. In particular, it relates to a carbon fiber reinforced plastic material mixed with nanofillers and a method for manufacturing the same. Background technique [0002] Carbon Fiber Reinforced Plastic (CFRP) is a material that is filled with high carbon fiber in commonly used plastics and has significantly improved rigidity compared with plastic monomers. CFRP has a rigidity that can replace metal, so it has begun to be used in the fuselage of aircraft, the body of automobiles, etc., and their weight has been greatly reduced. Recently, the use of CFRP has expanded to automotive parts, sporting goods, and the like. Therefore, further improvement of the mechanical capability of CFRP is required. [0003] For example, Non-Patent Document 1 describes CFRP in which clay-containing polyamide 6 is mixed with glass fibers (GF) or carbon fibers (CF). Non-Pat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/04B29B7/42B29B7/90C08L77/00B29C48/07B29C48/305B29C48/92
CPCB29C47/14B29C2947/92209B29C47/862C08J5/10B29K2105/162B29C2947/92704B29C47/0021B29B7/286B29C2947/92409C08K2201/016C08L77/02B29C47/92C08K3/34C08K7/06C08L77/06B29B7/90B29B7/005B29C47/0014B29C47/109B29B7/14C08K3/346C08K2201/011B29C48/92B29C48/298B29C48/865B29C48/05B29C48/08B29C48/305B29C2948/92209B29C2948/92409B29C2948/92704B29C48/2886B29C48/07B29C48/30B29B7/42C08J3/20C08J3/22C08J5/005C08J5/042C08K3/04
Inventor 清水博
Owner NAT INST OF ADVANCED IND SCI & TECH