Idemitsu Petrochemical Co., Ltd.

Atsuhiko Ubara

Yutaka Minami

Masami Kanamaru

Koji Kakigami

Takaharu Yasue

Masahiro Sano

Fumioki Fukatsu

Shigeru Ohyama

Nobuo Kusamoto

Nobutaka Sasaki

Satoshi Mikami

A polypropylene-based calendered or injection-molded article satisfying the requirements of (1) having a tensile modulus TM of 5 MPa or higher and (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (&deg; C.) satisfying the formula: TM&gE;5&times;Tm&minus;450, is less tacky and excellent in flexibility and transparency. Such a polypropylene-based calendered or injection-molded article is produced from a propylene polymer satisfying the requirements of (1) having a component soluble in a 25&deg; C. hexane in a content H25 of 0 to 80% by weight; (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (&deg; C.) satisfying the formula: &Dgr;H&gE;6&times;(Tm&minus;140) wherein &Dgr;H is a melting endotherm (J/g); and (3) having an intrinsic viscosity &lsqb;&eegr;&rsqb; of 1 to 3 dl/g as measured at 135&deg; C. in tetralin.

Polypropylene-based calendered article and injection-molded article

A resin composition contains a thermoplastic elastomer, natural organic, and silicone. As the thermoplastic elastomer, an olefin thermoplastic elastomer, such as a ethylene-propylene copolymer or the like, can be used. As the thermoplastic elastomer, a styrene thermoplastic elastomer, such as a styrene-butadiene copolymer or the like, can be used. As the natural organic, silk, cellulose, collagen or the like can be used. It is advisable that the content of the natural organic is 5-30 wt %, and the content of silicone is 0.3-10 wt %. Where the natural organic is a fine powder state, it is preferable that the particle size is less than 300 &mgr;m. Moldings are sheets or the like, formed by using the aforementioned resin composition.

Resin composition and moldings

Substance including natural organic substance fine powder

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Chiba, Japan

Atsuhiko Ubara