Divisions
Plastic Film Division
Plastic Film Division provides the plastic packaging film essential to our daily lives. Our film is light, strong, safe—and functional. Our products are widely used for food packaging, as important components of electronic devices, and other fields. And now our film with cutting-edge technology protects your valuable goods.
New Materials Division
Stating our business vision “To deliver key parts to the world from Japanese local city, Marugame” New Materials Division delivers sophisticated products—including optical films for use in smartphones and TVs and urethane elastomer films for automotive and medical use— to users all around the world, building on its long experience developing film processing technology. We will continue to deliver products targeted to fields for which there is a high social demand, such as electronic information materials, the automotive industry, medicine, and human services.
Housing Materials Division
Housing Materials Division provides you a variety of components used in products intimately familiar to us in our daily lives, such as housing and furniture. Okura puts its advanced technology, based on decorative and manufacturing techniques developed over many years, to use both in wrapping the living spaces of children and the elderly in a gentle embrace, as well as in providing businesses safe and secure spaces.
Research and Development Center
By combining the elemental technologies we have cultivated, we are engaged in research and development to create attractive products that meet the demands of users.
■ Development Direction
■ Core Tecnology
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Film-forming
Film forming technology involves melting various resins in an extruder, extruding them through a die, and cooling the extruded resin to obtain film.
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・Inflation
Molten resin is extruded from an inflation die into a tube shape, air is blown into the tube to inflate it like a balloon, and the film is cooled and rolled while being pulled by rollers.
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・T-die Casting
Molten resin is fed into a T-shaped die, and after the resin is spread to both ends of the die at the manifold, it is discharged from the lip voids in the form of a film. The film is then cooled by cooling rolls and rolled up.
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Stretching
This technology is used to modify the physical properties of a heated film by stretching it longitudinally or transversely and aligning the molecules, thereby adding new functions to the film. Our techniques include longitudinal stretching, transverse stretching, tubular stretching, and sequential biaxial stretching.
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Coating
Technology to precisely coat, dry, and cure a solution of formulated materials on the surface of a film to impart optical and physical functions.
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・Die Coating
This method coats the film while pushing the coating agent out of the die.
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・Reversed-Gravure Coating
In this method, the gravure roll is rotated in the opposite direction to that of the substrate, the rotating gravure roll scrapes up the coating agent, the doctor blade scrapes off excess coating agent, and the coating agent is coated onto the film.
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Printing
This technology is used to modify the physical properties of a heated film by stretching it longitudinally or transversely and aligning the molecules, thereby adding new functions to the film. Our techniques include longitudinal stretching, transverse stretching, tubular stretching, and sequential biaxial stretching.
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・Flexo Printing
A method in which ink is supplied to a convex plate and pressure is applied from the film side to transfer and dry the ink on the convex to the film.
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・Gravure Printing
A method in which ink is supplied to an intaglio plate, excess ink is scraped off with a doctor blade, and pressure is applied from the film side to transfer and dry the ink in the concave area onto the film.
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Lamination
Technology to develop multilayer films with composite performance by bonding films with different functions using adhesives or molten resins.
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・Dry lamination
Method of laminating film to film or film to metal using adhesives.
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・Extrusion lamination
Method of laminating film to film or film to metal by feeding molten resin from an extruder.
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Pressing
Technology to develop multilayer films with composite performance by bonding films with different functions using adhesives or molten resins.
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Extraction
This technology selectively separates specific components from liquids, individuals, and other materials efficiently and at high concentrations.