Stampable sheet and molded article using the same

A polypropylene resin-based stampable sheet with a flame retardant and dispersant, combined with inorganic fibers, addresses the challenges of weight reduction and flame resistance in battery housings, ensuring enhanced strength, rigidity, and fire resistance, and delaying fire spread in automotive components.

JP7864696B2Active Publication Date: 2026-05-25MITSUBISHI CHEM CORP +1
View PDF 9 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
MITSUBISHI CHEM CORP
Filing Date
2022-04-18
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Conventional resin-based materials for high-energy-density batteries face challenges in achieving both weight reduction and flame resistance, with issues such as bio-residual additives, poor dispersibility of phosphorus-based flame retardants, and decreased mechanical strength due to high flame retardant content, leading to molding defects.

Method used

A stampable sheet composed of a polypropylene resin containing specific proportions of a flame retardant, dispersant, and inorganic fibers, along with a battery housing made of fiber-reinforced resin, which includes inorganic fibers with high melting temperatures, addresses these issues by enhancing flame resistance and processability.

Benefits of technology

The solution provides a stampable sheet with improved strength, rigidity, and flame resistance, and a battery housing that delays fire spread to automotive interior components during thermal runaway, while maintaining mechanical properties and processability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 0007864696000004
    Figure 0007864696000004
  • Figure 0007864696000005
    Figure 0007864696000005
  • Figure 0007864696000006
    Figure 0007864696000006
Patent Text Reader

Abstract

This stampable sheet contains (A) a thermoplastic resin, (B) a flame retardant, (C) a dispersant, and (D) inorganic fibers. The contained amount of the inorganic fibers (D) is 1-80 mass% with respect to the total weight. The contained amount of the dispersant (C) with respect to 100 parts by mass of the flame retardant (B) is more than 0 but not more than 25 parts by mass.　According to the present invention, it is possible to provide a stampable sheet that has excellent strength, rigidity, and flame shielding ability, and excellent processability in such as stamping molding.
Need to check novelty before this filing date? Find Prior Art