Toray Industries, Inc.

Kohzo Takahashi

Masahiro Kimura

Koichi Abe

Hiroji Kojima

Ryosuke Matsui

Masaru Suzuki

Takashi Mimura

Hirokazu Kurome

Yuzo Shimizu

Ryousuke Matsui

Kenji Tsunasima

Naotake Kashiwakura

A biaxially stretched polyester film for forming a container, characterized by being formed of a polyester substantially consisting of an ethylene terephthalate unit and an ethylene naphthalate unit, the refractive index in the direction of thickness of the film being 1.5 or greater. This film is not only excellent in the formability during formation into cans or the like, but has excellent properties in taste property, particularly, the taste property after the retorting, and may be suitably used for containers produced by forming process and, particularly, for metallic cans.

Biaxially stretched polyester film for forming container and method of producing the film

Biaxially-drawn polyester film for fabrication which is characterized in that it is a film comprising polyester in which ethylene terephthalate units and/or ethylene naphthalate units are the chief structural component, and the melting point of said film is 180-270&#xb0; C., the angle of contact to water is 70&#xb0;-120&#xb0;, and the planar orientation coefficient is 0.08-0.15. This film shows outstanding release properties following repeated use, use after fabrication and use in an aqueous environment and, furthermore, it exhibits stable properties with little variation and, in particular, following lamination to metal sheet such as steel or aluminium, when used as the inner face of a fabricated metal can, it is outstanding in its non-stick properties to the contents, and provides a combination of heat resistance and processability.

Biaxially-oriented polyester film for fabrication and method of producing the same

Biaxially-drawn polyester film for fabrication which is characterized in that it is a film comprising polyester in which ethylene terephthalate units and/or ethylene naphthalate units are the chief structural component and containing 0.1-2 wt % of a carnauba wax and 1 to 200 ppm of germanium, and the melting point of said film is 180-270&deg; C., the angle of contact to water is 70&deg;-120&deg;, and the planar orientation coefficient is 0.08-0.15. This film shows outstanding release properties following repeated use, use after fabrication and use in an aqueous environment and, furthermore, it exhibits stable properties with little variation and, in particular, following lamination to metal sheet such as steel or aluminium, when used as the inner face of a fabricated metal can, it is outstanding in its non-stick properties to the contents, and provides a combination of heat resistance and processability.

Biaxially-oriented polyester film for fabrication

A biaxially oriented polyester film capable of lining the interior and/or exterior of a container, including a polyester containing about 93 mol % or more of ethylene terephthalate. The film has a breaking elongation in the machine direction. (S MD) and the breaking elongation in the transverse direction (S TD), satisfying the relationships 140%&lE;(S MD&plus;S TD)/2&lE;300% and &verbar;S MD&minus;S TD&verbar;&lE;60%. The film is capable of lining the interior and/or exterior of food containers, especially on the inner and outer faces of metallic cans, since the film exhibits excellent formability, impact resistance and taste properties.

Biaxially oriented polyester film to be formed into containers

A formable biaxially-oriented polyester film has a difference of not more than about 0.007 between the maximum and minimum values of face orientation coefficient as determined in a 20 square cm region of the film, and an average face orientation coefficient of about 0.11 to 0.15 as determined in such film region.

Formable biaxially-oriented polyester film

Biaxially stretched polyester film for forming container and method of

Disclosed is a film having a good adhesive property comprising a base film and a coated layer formed on at least one surface of the base film. The coated layer comprises a mixture whose main constituents are a polyester resin and a melamine compound, and not less than 60% by weight of constituents forming the coated layer is the polyester resin. Or the concentration of a carboxylic acid of the surface of the coated layer is not less than 0.005 and the concentration of a primary amine of the surface of the coated layer is not less than 0.0015. The film having such a coated layer can indicate an excellent adhesive property for a deposited layer under a high-moisture condition, particularly, in water, and an excellent adhesive property for a printing ink.

Film having a good adhesive property and process for producing the same

A biaxially oriented polyester film is suitable for laminating onto a metallic sheet so as to provide a laminate capable of being formed into a can. The polyester film comprises at least one of:

Biaxially oriented polyester film for laminating metallic sheets

Disclosed is a biaxially oriented, laminated polyester film having a Young's modulus of 10-250 kg/mm.sup.2 and formed by laminating layers of polyester B on both surfaces of a layer of polyester A whose main constituent is an ethylene terephthalate having a glass transition temperature of not higher than 50.degree. C. This film not only has characteristics that the conventional polyester films do not possess, such as impact resistance, resistance to pinhole generation and low-temperature performance, but also is excellent in flexibility.

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Otsu, Japan

Kohzo Takahashi