Method of manufacturing package structure

Patent metadata

Field	Value
Publication number	US-11465788-B2
Application number	US-201716335375-A
Country	US
Kind code	B2
Filing date	Sep 19, 2017
Priority date	Sep 28, 2016
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A method of producing a packaging structure, including the steps: coating at least one surface of a first sheet base material and/or a second sheet base material with a synthetic polyisoprene latex having a weight average molecular weight of 500,000 -5,000,000 and/or a styrene-isoprene-styrene block copolymer having a weight average molecular weight of 100,000-300,000, sandwiching an article to be packaged in a state wherein the first and second sheet base material are in contact with each other via a latex coated surface formed on the first and/or second sheet base material to thereby obtain a laminated body, pressing a portion where at least the first and second sheet base material of the laminated body are in contact with each other via the latex coated surface at a temperature of 100° C. or less to thereby obtain a pressed laminated body, and performing a sterilization treatment on the pressed laminated body.

First claim

The invention claimed is:

1. A method of producing a packaging structure, comprising:
a coating step of coating at least one surface of a first sheet base material and/or a second sheet base material with a latex of a synthetic polyisoprene having a weight average molecular weight of 500,000 to 5,000,000 and/or a styrene-isoprene-styrene block copolymer having a weight average molecular weight of 100,000 to 300,000;
a lamination step of sandwiching an article to be packaged between the first sheet base material and the second sheet base material in a state in which at least a part of the first sheet base material and at least a part of the second sheet base material are in contact with each other via the latex coated surface formed on the first sheet base material and/or the second sheet base material to thereby obtain a laminated body;
a pressing step of pressing a portion where at least the first sheet base material and the second sheet base material of the laminated body are in contact with each other via the latex coated surface at a temperature of 100° C. or less to thereby obtain a pressed laminated body; and
a sterilizing step of performing a sterilization treatment on the pressed laminated body.

2. The method of producing a packaging structure according to claim 1 , wherein the latex contains a rosinate.

3. The method of producing a packaging structure according to claim 1 , wherein the latex has a solid content concentration of 10 to 70% by weight.

4. The method of producing a packaging structure according to claim 1 , wherein the article to be packaged is an adhesive plaster.

5. The method of producing a packaging structure according to claim 1 , wherein the first sheet base material and/or the second sheet base material is a paper material.

6. The method of producing a packaging structure according to claim 1 , wherein in the coating step, when coating both the first sheet base material and the second sheet base material with the latex, an amount of the latex for coating on the first sheet base material and the second sheet base material is, for each base material, 2 to 10 g/m 2 in terms of weight after drying.

Assignees

• Zeon Corp

Inventors

• Satoh Yoshitaka

Classifications

• B65B11/50 Primary

  Enclosing articles, or quantities of material, by disposing contents between two sheets, e.g. pocketed sheets, and securing their opposed free margins (apparatus or devices for forming pockets in or from sheets, blanks or webs B65B47/00) · CPC title

• C09J109/08

  Latex · CPC title

• A61F13/00076 Primary

  Packaging of adhesive dressings · CPC title

• B65B25/14

  Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form · CPC title

• A61F13/0259

  characterised by the release liner covering the skin adhering layer · CPC title