Sumitomo Chemical Company, Limited

Kaori Tsubouchi

Takeo Kitayama

Shigeyoshi Matsubara

Tatsuhiro Nagamatsu

Ryuma Kuroda

Nobuo Oi

Hiroaki Takahata

Kyoko Hino

Kenzo Hayama

Disclosed is a harmful-insect-eliminating formed resin article, wherein the article contains a 1,2-polybutadiene resin and a volatile harmful-insect-eliminating component, e.g. eucalyptol and pulegone, in an amount effective for eliminating a harmful insect. A typical use of the formed article is an animal collar.

Harmful-insect-eliminating formed resin article and animal collar using the same

An optical member comprising a polymer which is amorphous and has a glass transition temperature of not lower than 110&#xb0; C. and optical property parameters O'(&#x221e;)) and O&#x2032;(&#x221e;) that satisfy the following inequality (1),|(&#x221e;)|&#x3c;&#x2212;(&#x221e;)|+&#x2003;&#x2003;(1),is superior in its heat resistance and transparency and high in its stability of optical properties. Therefore, the optical member can be used as, for example, a constituent of optical systems in a liquid crystal display, thereby suppressing change in a display color tone depending on variation of using circumstances of the liquid crystal display.

Optical member and optical product provided therewith

Foamed thermoplastic resin sheet and manufacturing method of the same

A foamed thermoplastic resin sheet manufacturing device is provided with (i) an extruder for melting and kneading a thermoplastic resin and a foaming agent to form a melted/kneaded mixture and extruding the melted/kneaded mixture, (ii) a die which is provided at a front end of said extruder and forms the melted/kneaded mixture into a sheet-like foamy thermoplastic resin material, (iii) a vacuum chamber in which the foamy thermoplastic resin material extruded through said die expands under a reduced pressure, and (iv) a facing-wall section composed of a pair of walls of said vacuum chamber which face each other in a thickness direction of the foamy thermoplastic resin material, at least one of the walls in pair being a movable wall provided so as to move in directions in which said walls approach and separate each other. By this arrangement, foamed thermoplastic resin sheets with various thicknesses can be produced.

Manufacturing device of foamed thermoplastic resin sheet

The present invention provides a polypropylene-based foamed sheet whose expansion ratio is 4 or more times characterized by expansion ratio A of the part (skin layer) up to 20% in each of the seat thickness from both surface of said polypropylene-based foamed sheet and expansion ratio B of part other than said skin layer (core layer) satisfying the following formula (1) and the like

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Ibaraki, Japan

Kaori Tsubouchi