Method for producing fiber-reinforced thermoplastic resin molded article

The method of mixing continuous reinforced fibers with thermoplastic resin fibers and performing a melting impregnation step addresses the high melt viscosity issue of polyphenylene ether resins, enhancing impregnability and productivity while reducing variations and waste in fiber-reinforced thermoplastic resin molded products.

JP2025072010APending Publication Date: 2025-05-09TOYOBO MC CORP
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Patent Information

Application Number
JP2023182490
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-10-24
Publication Date
2025-05-09

AI Technical Summary

Technical Problem

Polyphenylene ether resins have high melt viscosity, making it difficult to impregnate the resin between fibers, particularly between long fibers, which affects the moldability and impregnability of fiber-reinforced thermoplastic resin molded products.

Method used

A method involving mixing continuous reinforced fibers with thermoplastic resin fibers, followed by a melting impregnation step at a temperature above the melting point of the thermoplastic resin, and a cooling step under pressure, to ensure uniform resin distribution and impregnation between the fibers.

Benefits of technology

This method simultaneously addresses the challenges of impregnability and productivity, reducing variations in resin impregnation properties and allowing for easy adjustment of fiber volume content, thereby minimizing waste and improving the quality of fiber-reinforced thermoplastic resin molded products.

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Abstract

To impregnate resin between fibers, particularly between long fibers, without requiring modification of polyphenylene ether resin, which has traditionally been difficult to impregnate between long fibers.SOLUTION: The present invention provides a method for producing a fiber-reinforced thermoplastic resin, wherein a high level of resin impregnability into reinforcing fibers and reduced variation in impregnability are achieved even in the case of a resin having high melt viscosity, by devising how reinforcing fibers and resin are arranged.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Production of reinforced thermoplastic resin composition

    JP1994122771A

  • Reinforced fiber base material, preform and composite material and method of manufacturing the base material

    JP2005213469A

  • Method for producing fiber-reinforced composite material

    JP2013006962A