Package, and methods for producing and for using self-adhesive

Abstract

Provided is a package comprising: a space to store contents; and an opening by which the space and an outside communicate, wherein the opening is repeatedly openable and sealable by a self-adhesive (E) that is made by cross-linking a resin composition (C) containing a (meth)acrylic acid ester copolymer resin (A), and a crosslinking agent (B), the package being repeatedly sealable after opened first time.

What is claimed is: 
     
         1 . A package comprising:
 a space to store contents; and   an opening by which the space and an outside communicate,   wherein the opening is repeatedly openable and sealable by a self-adhesive (E) that consists of a cross-linking material of a resin composition (C) containing a (meth)acrylic acid ester copolymer resin (A), and a crosslinking agent (B).   
     
     
         2 . The package according to  claim 1 , comprising:
 a package body that has the space to store the contents, the package body being formed with the opening; and   a lid with which the opening of the package body can be covered,   wherein each of the package body and the lid has a contact portion where the package body and the lid are in contact with each other in a position of the package being closed, and   the self-adhesive (E) is arranged on at least part of the contact portion.   
     
     
         3 . The package according to  claim 1 , wherein a glass transition temperature of the (meth)acrylic acid ester copolymer resin (A) is no more than −10° C. 
     
     
         4 . The package according to  claim 1 , wherein the (meth)acrylic acid ester copolymer resin (A) has a N-methylol group, and gel fraction of no more than 70%. 
     
     
         5 . The package according to  claim 1 , wherein the resin composition (C) is a resin composition foam (D) that is foamed. 
     
     
         6 . The package according to  claim 1 , wherein the resin composition (C) contains 0.1 to 20 parts by mass of a carbodiimide crosslinking agent (B 1 ), to 100 parts by mass of the (meth)acrylic acid ester copolymer resin (A). 
     
     
         7 . The package according to  claim 1 , wherein the package is made of either paper or plastic. 
     
     
         8 . A method for producing the self-adhesive (E) to be arranged on the package according to  claim 1 , the method comprising:
 making the resin composition (C) that contains the (meth)acrylic acid ester copolymer resin (A), and the crosslinking agent (B); and   cross-linking the resin composition (C).   
     
     
         9 . A method for producing the self-adhesive (E) to be arranged on the package according to  claim 5 , the method comprising:
 making the resin composition (C) that contains the (meth)acrylic acid ester copolymer resin (A), and the crosslinking agent (B);   foaming the resin composition (C), to make the resin composition foam (D); and   cross-linking the resin composition foam (D).   
     
     
         10 . The method for producing the self-adhesive (E) according to  claim 8 , wherein said cross-linking is carried out on a surface of the package. 
     
     
         11 . A method for using a self-adhesive (E) for adhesion in a package in order to seal an opening, the package comprising: a space to store contents; and the opening by which the space and an outside communicate, the opening being repeatedly openable and sealable. 
     
     
         12 . The method for using a self-adhesive (E) according to  claim 11 , wherein
 the package comprises: a package body that has the space to store the contents, the package body being formed with the opening; and a lid with which the opening of the package body can be covered, and   the adhesion is at a contact portion of the package body and the lid.   
     
     
         13 . The method for using a self-adhesive (E) according to  claim 11 , wherein the self-adhesive (E) is a foam.