Multilayer body and container

Patent metadata

Field	Value
Publication number	US-9327879-B2
Application number	US-201013148786-A
Country	US
Kind code	B2
Filing date	Feb 12, 2010
Priority date	Feb 13, 2009
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

The present invention provides a multilayer body, a packaging material and a container, each of which can maintain excellent water repellent properties and non-adhesive properties. Specifically, the present invention describes a non-adhesive multilayer body wherein hydrophobic oxide fine particles having an average primary particle diameter of 3-100 nm adhere to at least a part of the outermost layer.

First claim

The invention claimed is:

1. A packaging material which is formed of a multilayer body having at least a base layer and a thermal adhesive layer, and which is a lid material, with the thermal adhesive layer being laminated as the outermost layer on one side of the packaging material, hydrophobic fine particles having a primary particle diameter of 3 to 100 nm being attached to the outside surface where the thermal adhesive layer does not adjoin another layer, and the hydrophobic oxide fine particles being configured to form a porous layer having a three-dimensional network structure, wherein the hydrophobic oxide fine particles in a region of thermal adhesion become embedded in the thermal adhesive layer during thermal adhesion process.

2. The packaging material according to claim 1 , wherein the amount of the hydrophobic oxide fine particles attaching to the thermal adhesive layer is 0.01 to 10 g/m 2 .

3. The packaging material according to claim 1 , wherein the specific surface area by BET method of the hydrophobic oxide fine particles is 50 to 300 m 2 /g.

4. The packaging material according to claim 1 , which the lid material is used for sealing an opening of a container filled with contents in contact with the thermal adhesive layer of the lid material.

5. The packaging material according to claim 1 , wherein particulate filler containing at least one of an organic component and an inorganic component is contained in the thermal adhesive layer.

6. The packaging material according to claim 5 , wherein the average particle diameter of the particulate filler is 0.5 to 100 μm.

7. The packaging material according to claim 1 , wherein the porous layer is obtained by forming a coat on the thermal adhesive layer using a dispersion of the hydrophobic oxide fine particles dispersed in a solvent, and drying the coat.

8. The packaging material according to claim 1 , wherein the hydrophobic oxide fine particles are of hydrophobic silica.

9. The packaging material according to claim 8 , wherein the hydrophobic silica has trimethylsilyl groups on the surface of the particle.

10. The packaging material according to claim 1 , wherein an oxygen absorbent being included in at least one of the base layer and the thermal adhesive layer.

11. The packaging material according to claim 10 , wherein the oxygen absorbent contains metal particles coated on at least part of the particle surfaces with at least one of a resin component and an inorganic oxide.

Assignees

• Sekiguchi Tomonobu
• Yamamoto Masashi
• Yamada Kazunori
• Kanno Shuhei
• Toyo Aluminium Kk

Inventors

• Sekiguchi Tomonobu
• Yamamoto Masashi
• Yamada Kazunori
• Kanno Shuhei

Classifications

• B32B27/06 Primary

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title

• Y10T428/259

  Silicic material · CPC title

• B65D43/02 Primary

  Removable lids or covers (with means for piercing, cutting, or tearing a frangible inner closure B65D51/22) · CPC title

• Y10T428/249986

  Void-containing component contains also a solid fiber or solid particle · CPC title

• C08J2325/06

  Polystyrene · CPC title