Diafoil Hoechst Company, Limited

Diafoil Company, Ltd.

Daifoil Company, Limited

Narihiro Masuda

Yoshinori Sato

Tomoyuki Kotani

Satoshi Otonari

Chikakazu Kawaguchi

Masashi Inagaki

Takashi Harada

Shigeo Utsumi

Seiji Sakamoto

Kazuo Endo

Yujiro Fukuda

Kazuyuki Akatsu

Syuji Anno

A biaxially oriented laminated polyester film, comprises a layer A having a thickness of 0.5 .mu.m, composed of a polyester having no crystalline melt peak at not less than 230.degree. C. in the differential thermal analysis and laminated on at least one surface of another polyester layer, with a coating layer containing not less than 50 wt % of an acrylic resin or urethane resin as a coating component being formed on the surface of said layer A.

Biaxially oriented laminated polyester film

A biaxially oriented polyester film for a magnetic recording medium contains: 1) at least two different sizes of synthetic calcium carbonate particles; and 2) aluminum oxide particles to produce a film with excellent surface uniformity, running properties, and slittability wherein the film generates few scratches and low amounts of abrasion dust. The synthetic calcium carbonate particles are surface treated with a polycarboxylic acid, followed by treatment with a phosphorus compound. The biaxially oriented polyester film can comprise a layer in a multilayer film.

Biaxially oriented polyester film for magnetic recording medium

The disclosure describes a polyester film for sublimation-type thermosensitive transfer, comprising a polyester film having the degree of planar orientation of 0.145 to 0.169, and a coating layer formed by applying a water solution or a water dispersion composed of at least one water-soluble or water-dispersible resin selected from the group consisting of urethane-based resins, polyester-based resins and acrylic-based resins, on at least one side of the film before oriented crystallization of said film is completed, and subjecting the coated polyester film to drying treatment, stretching treatment and heat-setting treatment.

Polyester film for sublimation-type thermosensitive transfer recording

The disclosure describes a high-density magnetic recording medium comprising a biaxially oriented, laminated polyester film which is coextruded, so that a polyester A layer subject to plastic deformation by calendering treatment forms one of the surfaces of a base film, and

Magnetic recording medium having a calendered polyester layer with a

A base film of a digital compact cassette tape comprising at least two layers consisting of laminated biaxially oriented polyester films, one surface of which has center line average roughness of 5 to 20 nm, and the other surface of which has center line average roughness of 15 to 45 nm, and which has a Young's modulus in a machine direction of at least 600 kg/mm.sup.2, which base film is excellent in running stability and electromagnetic conversion characteristics.

Base film of digital compact cassette tape

A biaxially oriented polyester film for use in a capacitor having improved break down strength, which polyester having an acid component at least 90% by mole of which is terephthalic acid and a glycol component at least 97% by mole of which is 1,4-cyclohexanedimenthanol, in which film, an extracted amount with chloroform is not more than 1.3% by weight per 24 hours.

Polyester film for capacitor

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

Disclosed herein is a process for producing a polyphenylene sulfide film, which comprises melt-molding polyphenylene sulfides in a sheet-like form from a die, casting the thus obtained sheet-like form onto a chilled drum on which an adhering liquid has been applied, while closely contacting the sheet-like form with the chilled drum surface by an electrostatic pinning method.

Growing community of inventors

Yokohama, Japan

Narihiro Masuda