FRP PLATE SPRING - NHK SPRING CO LTD

Title:

FRP PLATE SPRING

Document Type and Number:

WIPO Patent Application WO/2023/153517

Kind Code:

A1

Abstract:

The present invention pertains to an FRP plate spring (1) provided with a resin material (R) and a plurality of reinforcing fibers (F) that are embedded in the resin material (R) and that extend in one direction (X). The diameter of each of the plurality of reinforcing fibers (F) is 1-100 μm. The amount of the plurality of reinforcing fibers (F) contained in the resin material (R) is 50-70 vol%. In a cross-sectional view orthogonal to the one direction (X), when a plurality of divided regions (x1, x2) including a portion of the plurality of reinforcing fibers (F) is magnified 300 times, the standard deviation of the area proportion of the reinforcing fibers (F) included in each of the divided regions (x1, x2) is 3% or less.

Inventors:

SANO TAKAMICHI (JP)
IMAMURA MASARU (JP)
KINOSHITA MASATAKE (JP)

Application Number:

PCT/JP2023/004875

Publication Date:

August 17, 2023

Filing Date:

February 14, 2023

Export Citation:

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Assignee:

NHK SPRING CO LTD (JP)

International Classes:

F16F1/18; B29C70/16; B29C70/34; F16F1/368

Foreign References:

JPH04136531A	1992-05-11
JPH0267122A	1990-03-07
JPS60116933A	1985-06-24