| 摘要 |
There is provided a polyester composition which can be suitably used as a molding material for fibers, films or resins having an enhanced elastic modulus and softening points. The thermoplastic resin composition comprises 100 parts by weight of a thermoplastic resin (A) and 0.01-10 parts by weight of a fibrous aluminum oxide filler (B) composed of a compound represented by the following formula (I): <?in-line-formulae description="In-line Formulae" end="lead"?>Al<SUB>x</SUB>O<SUB>y</SUB>H<SUB>z</SUB> (I) <?in-line-formulae description="In-line Formulae" end="tail"?> (where x, y and z are numbers of 0-3, and x=(2y-z)/3 is satisfied), wherein the primary particles of the fibrous aluminum oxide filler have a mean fiber length of 10-1000 nm, a mean fiber diameter of 0.5-7 nm and a mean aspect ratio of 2000-5. The fibrous aluminum oxide filler (B) is preferably surface-coated with a silane coupling agent.
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