Idemitsu Petrochemical Co., Ltd.

Hiroshi Odaka

Toyokazu Yamada

Hiroyuki Takahashi

Hiroshi Maeda

Shuichi Gotoh

Kenichi Tanaka

Shuichi Goto

Ikuya Ishii

Tsuyoshi Kishida

A multi-layer structure having two or more layers which comprises a surface layer (a) comprising a thermoplastic resin and having a thickness of 10 to 80 &mgr;m and an adjacent layer (b) comprising a thermoplastic resin or a thermoplastic resin containing an inorganic filler, an interlaminar peeling strength between the surface layer (a) and the adjacent layer (b) being in the range of 0.3 to 2.0 kg/15 mm; and a container comprising this multi-layer structure, wherein the container is excellent in sealing properties, heat resistance and opening properties.

Multi-layer container structure

A snap-fastener bag according to the present invention is composed of a quadrilateral bag body, a deaerating passage provided along a bottom-seal and a snap fastener provided along the opening. The deaerating passage is provided by configurating a deaerating passage opening as a non-adhesive part through one side-seal and along the bottom-seal and by configurating an adhesive part near the bottom of the side-seal to near the other side-seal positioned at a predetermined interval from the bottom-seal in parallel to adhere between the top and bottom films. A paint film coated with a sticky substance having the kinematic-viscosity of 4-5,000.times.10.sup.-6 m.sup.2 /s (100.degree. C.) such as polybutene is applied in the deaerating passage.

Snap-fastener bag

An easy-open, hermetically-sealed, packaging bag 1 whose opening end is heat-sealed, with a sealing material interposed therein, wherein the sealing material comprises (a) an intermediate resin strip comprising a low-sealable resin layer and (b) two outer resin strips, the outsides of the outer resin strips being strongly bonded to the inside of the packaging bag by heat-sealing and being weakly melt-bonded to both sides of the intermediate resin strip, the innermost ends of the melt-bonded interfaces between the intermediate resin strip and the outer resin strips are located inner in the packaging bag than the innermost ends of the heat-sealed parts between the packaging bag and the outer resin strips.

Easy-open, hermetically-sealed, packaging bag

A multilayer container with a flange for sealing with a lid, wherein the thickness of the inner surface layer at the inner edge of the flange is thinner than that in the sealing area, is produced by a method wherein a circular portion of a multilayer sheet to be the flange is held at a certain pressure while the multilayer sheet is being thermoformed under specified molding conditions, with the other portion than the circular portion being stretched. Even a seal ring having an even surface serves as a means for sealing the resulting multilayer container with a lid while ensuring easy openability.

Method of producing an easily openable multilayer plastic container

Multilayer plastics containers and methods of producing the same

A hermetically sealed package comprising:

Growing community of inventors

Himeji, Japan

Hiroshi Odaka