Resin moldings having relatively low coefficients of expansion and composite products thereof
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United States of America Patent
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Issued Date -
Feb 20, 2003
app pub date -
Aug 5, 2002
filing date -
Aug 7, 2001
priority date (Note) -
Abandoned
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Abstract
Resin moldings are taught that have relatively low coefficients of linear expansion. For example, resin moldings may primarily comprise a polypropylene resin and/or an olefin-based thermoplastic elastomer. Composite products (10) may include at least two integrated resin-molded parts (12, 14, 16, and 18) whose compositions are different from each other, and at least one resin-molded part (18) may be comprised primarily of a polypropylene resin or olefin-based thermoplastic elastomer. The resin molding or at least one resin-molded part preferably contains a fibrous filler, which preferably comprises primarily carbon fibers, at a weight percentage of between about 1 and 10% and a powder filler (e.g., talc) at a weight percentage of between about 0 and 50%. The fibrous filler and the powder filler preferably serve as expansion/contraction suppression components for the resin material.
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