Multilayer label, container including the same, and method for producing container

Patent metadata

Field	Value
Publication number	US-10354560-B2
Application number	US-201515502937-A
Country	US
Kind code	B2
Filing date	Jul 1, 2015
Priority date	Aug 13, 2014
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

The present invention provides a multilayer label having good gas barrier properties and is capable of maintaining the gas barrier properties at a high level even when exposed to physical stresses such as deformation and impart. The present invention relates to a multilayer label for in-mold labeling. This multilayer label includes a base (X), a layer (Z) containing an aluminum atom, and a layer (Y) containing a polymer (A) having a functional group containing a phosphorus atom.

First claim

The invention claimed is:

1. A multilayer label for in-mold labeling, comprising:
a base (X);
a layer (Z) containing an aluminum atom; and
a layer (Y) containing a polymer (A) having a functional group containing a phosphorus atom,
wherein
the polymer (A) is a polymer (Aa) having at least one functional group selected from the group consisting of a phosphoric acid group, a phosphorous acid group, a phosphonic acid group, a phosphonous acid group, a phosphinic acid group and a phosphinous acid group, and
the base (X) comprises a thermoplastic resin film layer.

2. The multilayer label according to claim 1 , comprising at least one pair of the layer (Z) and the layer (Y) that are disposed contiguous to each other.

3. The multilayer label according to claim 1 , wherein:
the layer (Z) comprises a layer (Z1) containing a reaction product (E);
the reaction product (E) is a reaction product formed by a reaction between a metal oxide (C) containing an aluminum atom and a phosphorus compound (D); and
in an infrared absorption spectrum of the layer (Z1), a maximum absorption wavenumber in a region of 800 to 1,400 cm −1 is 1,080 to 1,130 cm −1 .

4. The multilayer label according to claim 1 , wherein the layer (Z) comprises a deposited layer (Z2) of aluminum or a deposited layer (Z3) of aluminum oxide.

5. The multilayer label according to claim 1 , wherein the polymer (A) is a polymer (Aa) having at least one functional group selected from the group consisting of a phosphoric acid group and a phosphoric acid group.

6. The multilayer label according to claim 1 , having an oxygen transmission rate of 2 mL(m 2 ·day·atm) or less at 20° C. and 85% RH.

7. A container comprising the multilayer label according to claim 1 laminated thereon.

8. A method for producing a container, comprising:
placing the multilayer label according to claim 1 in a cavity between a female mold member and a male mold member; and
injecting a molten resin into the cavity to perform molding of a container body and lamination of the multilayer label to the container body simultaneously.

Assignees

• Kuraray Co

Inventors

• Inubushi Yasutaka
• Sasaki Ryoichi
• Nakaya Masakazu

Classifications

• C08J2433/04

  esters · CPC title

• B29C45/14811

  Multilayered articles (B29C45/14827 takes precedence) · CPC title

• G09F2003/0255

  laminated · CPC title

• G09F3/00

  Labels, tag tickets, or similar identification or indication means (medals or badges A44C3/00; making labels B31D1/02; sheets temporarily attached together B42F; labelling B65C; labels on record carriers G11B23/38, G11B23/40); Seals; Postage or like stamps · CPC title

• B32B9/00

  Layered products comprising a {layer of a} particular substance not covered by groups B32B11/00 - B32B29/00 · CPC title