Nippon Closures Co., Ltd.

Suntory Holdings Limited

Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Toyo Seikan Group Holdings, Ltd.

Japan Crown Cork Co Ltd.

Daisuke Tsuchimoto

Yuhei Yonekawa

Hideyuki Suzuki

Hiroaki Kikuchi

Takayuki Ishihara

Katsumi Hashimoto

Sei Nakagawa

Katsuhiro Muramoto

Shin Nakamura

Masataka Iyadomi

Go Oota

Toshio Akimoto

Kouhei Sasaki

A metal cap that has an adhesive inner surface coating film and a masking layer. A coating film of a coating composition containing an adhesive component in a base resin and a masking agent is formed between the top plate portion inner surface of the metal cap shell and the olefin resin liner. The coating film has an adhesive portion adhesive to the olefin resin liner and a non-adhesive portion non-adhesive or weakly adhesive to the olefin resin liner. The adhesive portion is formed by positioning the adhesive component on the coating film surface. The non-adhesive portion has the masking layer of the masking agent at a side facing the metal cap shell, such that a sea-island structure is formed on the coating film surface corresponding to the masking layer, in which the adhesive component is a dispersion phase and the base resin is a continuous phase.

Metal cap and method for manufacturing same

An oxygen-shielding container lid according to the present invention comprises a high density polyethylene cap shellhaving a skirt sectionand a top plate sectionprovided with an inner ringfor intimate contact with an inner surface of a container mouth; and an in-shell molded bodyprovided in a portion of an inner surface of the top plate section which is surrounded with the inner ring. The in-shell molded bodyis composed of a primary molded bodywhich has been formed by in-shell molding on the inner surface of the top plate section and which has an oxygen shielding function; and a secondary molded bodywhich has been formed on the primary molded bodyby in-shell molding so as to cover the primary molded bodyand to be fused and fixed to the inner surface of the top plate section at the peripheral edge of the primary molded body. A resin composition used for formation of the secondary molded bodycontains linear low density polyethylene, and has a melt flow rate at 190° C. of 1 to 10 g/10 minutes, a density of 0.900 to 0.920 g/cm, and a nominal tensile strain at break, as defined by JIS K-6922-2, of 400% or more.

Container lid having oxygen shielding properties

A resin composition for injection forming containing a high-density polyethylene, an ethylene-vinyl alcohol copolymer and an acid-modified linear low-density polyethylene, characterized in that the ethylene-vinyl alcohol copolymer is contained in an amount of 35 to 90 parts by mass and the acid-modified linear low-density polyethylene is contained in an amount of 10 to 35 parts by mass per 100 parts by mass of the high-density polyethylene.

Resin composition for injection forming

A formed body having a layer of a resin composition constituted by a thermoplastic resin and a barrier resin, wherein the layer of the resin composition forms, in a matrix of the thermoplastic resin, a layer structure in which the barrier resin is dispersed in the form of a lamellar dispersion phase stretching in one direction; and the ratio (a)/(b) of an aspect ratio (a) of the dispersion phase of the barrier resin near the surfaces of the layer and an aspect ratio (b) of the dispersion phase of the barrier resin in the central portion in the direction of thickness of the layer, is not more than 2.0. The formed body has the layer of the resin composition constituted by the thermoplastic resin and the barrier resin, and has a dispersion structure capable of exhibiting excellent barrier property despite of the single layer.

Formed body having a layer of thermoplastic resin

The present invention provides a moisture-absorbing resin composition comprising resin (A) in an amount of 100 parts by mass, and zeolite in an amount of 40 to 300 parts by mass, wherein resin (A) contains at least one polymer selected from among ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, copolymer of ethylene-ethyl acrylate and acrylonitrile-styrene, and copolymer of ethylene-ethyl acrylate, maleic anhydride, and acrylonitrile-styrene, and a molded product produced through molding of the moisture-absorbing resin composition. The moisture-absorbing resin composition exhibits high moisture absorbency, high moisture absorption rate, and adhesion, and the molded product is produced from the composition.

Moisture-absorbing resin composition and molded product thereof

Growing community of inventors

Kanagawa, Japan

Daisuke Tsuchimoto