Daiwa Can Company

Bell Polyester Products, Inc.

Junji Matsumura

Eiji Araki

Eiji Fujishige

Kenji Takagi

Takashi Kawada

Yuji Takeuchi

Keita Katsuma

Takashi Kimiduka

Hideaki Tomura

Masaya Okimoto

Akira Yamamoto

Hirokazu Konagaya

Katsumi Ohshima

Tadayosi Iwamaru

Keisuke Hashimoto

Sadamu Nakatsuka

Toshiyuki Ohkoshi

A can lid comprising: a main body comprising a laminate metal sheet, the laminate metal sheet comprising a metal sheet and a first resin film on a major surface of the metal sheet, the major surface having a score line delimiting an opening piece, the first resin film comprising a first resin layer comprising a dimer acid-copolymerized polyester resin and being amorphous; and a tab attached to the main body and adapted to cause a cleavage along the score line.

Can lid

A cap includes a cap body including a disk-shaped top plate portion and a cylindrical skirt portion provided at a peripheral edge portion of the top plate portion; and a disk-shaped sealing member including a sliding layer and a sealing layer, the sliding layer disposed on the top plate portion side and having a thin portion thinner than at least a center side provided on an outer peripheral edge side, and the sealing layer provided on a main surface opposite to the top plate portion side of the sliding layer and sealing a mouth portion of a can container.

A cap includes a cap body including a top plate portion and a skirt portion; a sealing member that is a separate member from the cap body and is provided in the cap body, the sealing member having an outer diameter smaller than an inner diameter of the skirt portion; a plurality of locking portions provided in a circumferential direction of the skirt portion, and configured to regulate a movement of the sealing member in a direction away from the top plate portion and support the sealing member; and a plurality of regulating portions provided in the circumferential direction of the skirt portion, protruding inward in a radial direction than an inner peripheral surface of the skirt portion, and configured to regulate a radial movement of the sealing member.

Cap configured to retain sealing member in cap body

The problem to be solved by the present invention is to provide a polyester resin excellent in various properties wherein the film formability is good, film fracture (hairs) and scraping (galling) are not easily generated in the drawing/ironing process when applied to a metal-sheet-coating polyester film, the film surface is not damaged when used as the inner-surface film for a metallic can, and the metallic can is hardly corroded (dent resistance), by dropping or external impact (denting), after a product is made by enclosing contents into the can. The copolyester resin of the present invention is characterized by comprising, as the constituent units, 50 to 93 mass % of (A) ester oligomer with the number-average molecular weight of 700 or lower and consisting of a dicarboxylic acid unit (a1) containing 70 mole % or more of the terephthalic acid component and a diol unit (a2) containing 70 mole % or more of the ethylene glycol component; and 7 to 50 mass % of (B) polyester polyol with the number-average molecular weight of 1500 to 3000 and consisting of a hydrogenated dimer acid unit (b1) and a 1,4-butanediol unit (b2).

Copolyester resin and polyester film for covering metal plates and laminated polyester film comprising same made into film

A manufacturing method of a cap () includes: supplying a first resin material to a molded product (A) having a top plate portion () and a skirt portion () integrally formed on the top plate portion () through a corner portion (); molding the first resin material of the molded product (A) disposed in a first lower mold () into a sliding layer () with a first upper mold (); supplying a second resin material to the sliding layer (); molding the second resin material of the molded product (A) disposed in a second lower mold () into a sealing layer () with a second upper mold (); taking out a sealing member () in the molded product (A); and inserting the sealing member () into another molded product (A).

Manufacturing method of cap and manufacturing apparatus of cap

Growing community of inventors

Sagamihara, Japan

Junji Matsumura