Laminate, blister pack, press-through package, and laminate manufacturing method

Patent metadata

Field	Value
Publication number	US-11220390-B2
Application number	US-201816478209-A
Country	US
Kind code	B2
Filing date	Jan 15, 2018
Priority date	Jan 24, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A laminate has a substrate layer, an intermediate layer, and a fluorine-based resin layer in that order, in which the substrate layer contains any one or more kinds of a polyolefin-based resin, a polyester-based resin or a vinyl-based resin, the intermediate layer contains a polyethylene resin and a modified polyethylene resin, and the intermediate layer has a thickness of 5 μm or more and 50 μm or less.

First claim

What is claimed is:

1. A laminate consisting essentially of a substrate layer, an intermediate layer, a fluorine-based resin layer, a second intermediate layer, and a second substrate layer in that order, wherein
said substrate layer contains any one or more kinds of a polyolefin-based resin, a polyester-based resin or a vinyl-based resin,
said substrate layer has a thickness of 45 μm or more and 100 μm or less, a thickness of said second substrate layer relative to a thickness of said substrate layer is 0.95 times to 1.05 times,
each of said intermediate layer and said second intermediate layer consists essentially of a linear low density polyethylene and a maleic anhydride-modified polyethylene,
a mixing ratio of the linear low density polyethylene and the maleic anhydride-modified polyethylene is 20:80 to 50:50,
said intermediate layer has a thickness of 5 μm or more and 50 μm or less,
a thickness of said second intermediate layer relative to a thickness of said intermediate layer is 0.9 times to 1.1 times,
said fluorine-based resin layer contains polychlorotrifluoroethylene,
said fluorine-based resin layer has a thickness of 40 μm or more and 150 μm or less, and
said laminate has a water vapor permeability of 0.5 g/m 2 /24 hours or less.

2. The laminate according to claim 1 , wherein said intermediate layer has a thickness of 10 μm or more and 30 μm or less.

3. A blister container comprising the laminate according to claim 1 .

4. A press-through package comprising the laminate according to claim 1 .

5. A method for manufacturing the laminate according to claim 1 , the method comprising a step of simultaneously melt extrusion-molding a resin to be a raw material of said substrate layer, a resin to be a raw material of said intermediate layer, a resin to be a raw material of said fluorine-based resin layer, a resin to be a raw material of said second intermediate layer, and a resin to be a raw material of said second substrate layer.

Assignees

• Fujimori Kogyo Co Ltd

Inventors

• Okamoto Hajime
• Suzuki Toyoaki

Classifications

• C08J5/18

  Manufacture of films or sheets · CPC title

• B32B27/30

  comprising vinyl {(co)polymers; comprising acrylic (co)polymers} · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B2439/70

  Food packaging · CPC title

• B32B27/304

  comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF · CPC title