Toray Industries, Inc.

Kiyohiko Ito

Koichi Abe

Yukichi Deguchi

Iwao Okazaki

Shoji Nakajima

Hidehito Minamizawa

Yukio Noguchi

Satoru Nishino

Hikaru Satake

Masaaki Sudo

A non-contact IC tag includes an insulating substrate, an IC tag having an IC chip and a matching-circuit equipped dipole antenna connected with the IC chip, and a first and second parasitic antenna both provided at the other side of the insulating substrate. The matching-circuit equipped dipole antenna has two antenna sections, a connecting terminal section and a matching circuit section. Projection images of the first and second parasitic antennae onto the one side of the insulating substrate respectively overlap at least portions of the two antenna sections of the matching-circuit equipped dipole antenna. The first and second parasitic antennae are made electrically conductive by a connected portion, and the projection images of the first and second parasitic antennae, and the connected portion onto the one side of the insulating substrate do not overlap the IC chip and the connecting terminal section of the matching-circuit equipped dipole antenna.

Non-contact IC tag

The present invention provides a polyphenylene sulfide film which consists essentially of a resin composition containing polyphenylene sulfide as major constituent, in which fine particles with an average particle size of 0.05-3 .mu.m are dispersed, the fine particles having a single particle index of not less than 0.5. The polyphenylene sulfide film of the present invention is excellent in not only the slipping property but also the number of electrical insulation defects are extremely small, so that the film of the present invention is useful for the dielectric film of film capacitor with stable initial characteristics. Further, since the film of the present invention is excellent in the slipping property and surface smoothness, so that it is useful as a base film for magnetic recording media with excellent magnetic conversion characteristics and excellent drop out characteristics.

Polyphenylene sulfide film and process of manufacturing the same

A biaxially oriented polyester film suited as a substrate for magnetic recording media. The film comprises a polyester and inert particles and has at least one surface with protrusions formed by the existence of the inert particles. The surface has a parameter of surface topography .sqroot.(.beta./.sigma.) of 0.1 to 0.7. The average distance between adjacent protrusions is not more than 20 um and the coefficient of friction of the surface and the parameter of surface topography satisfies the following equations (1) and (2): ##EQU1## wherein y is the coefficient of friction, .beta. is mean flatness of protrusions and .sigma. is standard deviation of height distribution of protrusions.

Biaxially oriented polyester film

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Otsu, Japan

Kiyohiko Ito