Diafoil Company, Ltd.

Diafoil Hoescht Company, Limited

Daifoil Company, Limited

Satoshi Otonari

Narihiro Masuda

Yoshinori Sato

Tomoyuki Kotani

Shigeo Utsumi

Tateo Kanesaki

Yoshihide Ozaki

Takashi Kagiyama

Kazuyuki Akatsu

Koichiro Ikushima

Norio Okumura

Masahiro Kita

A radiation sensitized paper having a polyester film, a coating layer which contains a water-soluble or water-dispersible resin and is formed on a surface of the polyester film, a resin layer which is formed on the coating layer and a fluorescent material layer which is formed on the resin layer, in which adhesion of the fluorescent material layer is good.

Radiation sensitized paper

A polyester laminated film comprising a polyester inner layer having a density greater than 1.3 g/cm.sup.3 and polyester outer layers on both sides of said inner layer having a density in the range of 0.4 to 1.3 g/cm.sup.3 is disclosed. The laminated film of this invention has high discrimination property and is also improved in image printability on the film surface in comparison with the conventional polyester films. When, for instance, the present laminated film is used as base for prepaid cards, which is a preferred application of the present film, it contributes to the enhancement of security of the cards, and it also enables high-quality printing by thermal transfer method.

Polyester laminated film

Disclosed herein is a magnetic card comprising a monoaxially or biaxially stretched minute-cellular polyester film which has an apparent density of 0.4 to 1.3 g/cm.sup.3 and an opacifying power of 0.2 or more and a magnetic layer applied on at least one surface of said film. By using the polyester film containing small air bubbles as the base material of the magnetic card, flexibility, flatness and punching property, which were insufficient in a magnetic card using a conventional polyester film, are improved.

Magnetic card

Minute-cellular polyester film

A film is disclosed, which comprises an at least uniaxially stretched finely cellulated polyester film of a high surface roughness having an apparent specific gravity in the range of 0.4 to 1.3 and an opacifying power of not less than 0.2, and a coating applied to either or both of the opposite surfaces of the polyester film. The coating applied to the minute-cellular polyester film serves the purpose of improving the adhesive property of the polyester film.

Minute-cellular polyester film provided with coating

A polyester film suitable for use as a substrate for magnetic recording media, characterized in that said polyester film is a biaxially oriented polyester film having an average refractive index n and a planar orientation .DELTA.P, which respectively satisfy the following equations [I] and [II]:

Polyester films suitable for use in magnetic recording media

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Nagahama, Japan

Satoshi Otonari