Space filler, method for producing the same, and space filling structure

JP7695944B2Active Publication Date: 2025-06-19KURARAY CO LTD
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Patent Information

Application Number
JP2022547515
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-09-08
Filing Date
2021-08-31
Publication Date
2025-06-19
Estimated Expiration
2041-08-31

AI Technical Summary

Technical Problem

Conventional space filling materials that expand upon heating suffer from insufficient pressing force due to the decomposition of organic binders, leading to the generation of decomposition gas that needs to be discharged.

Method used

A space filling material composed of reinforcing fibers with multiple intersections, where at least some intersections are bonded with a thermoplastic resin, and a specific degree of curvature is achieved by adjusting the form of a composite sheet and the conditions of a heat press.

Benefits of technology

The material exhibits excellent strength for reinforcing a space and fixing materials, with a high repulsive force from the reinforcing fibers upon curvature release, allowing for effective filling and fixation without significant gas generation.

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Patent Text Reader

Abstract

Provided is a space filling material having excellent strength for reinforcing a space when filled into a predetermined space and excellent strength for fixing a material to be fixed. This space filling material (11) is composed of reinforced fibers and a thermoplastic resin, and the reinforced fibers have a plurality of intersections with each other, with at least a portion of the intersections being adhered by the thermoplastic resin. With respect to the volume of all the reinforced fibers, the volume content is at least 20% by volume for reinforced fibers having a degree of curvature defined by the minimum distance between fiber length / both ends of the fiber of at least 1.004. The space filling material (11) expands when the reinforced fibers are released due to softening of the thermoplastic resin by heating, and fills the inside of a predetermined space (13).
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Citation Information

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