Package for high pressure treatment and method for treating foods at high pressure

Abstract

A package for high pressure treatment of foods and a method for treating foods at a high pressure, both being able to easily determine whether the foods accommodated in the package have been subjected to a high pressure treatment or not. The package for high pressure treatment includes a package body for accommodating articles to be treated at a high pressure, and an irreversible pressure-sensitive marker disposed on the package body at a position capable of being seen from the exterior of the package body and adapted to develop color when pressurized.

1 . A package for high pressure treatment, the package accommodating articles in the interior thereof for subjecting the articles to a high pressure treatment, the package comprising:
 a package body accommodating the articles; and   an irreversible pressure-sensitive marker disposed on said package body at a position capable of being seen from the exterior of said package body and adapted to develop color upon being pressurized.   
   
   
       2 . The package for high pressure treatment according to  claim 1 , wherein said irreversible pressure-sensitive marker includes a base member having an installation surface, microcapsules disposed dispersedly on said installation surface of said base member and with pigment sealed therein, and a transparent film formed on said installation surface, said microcapsules having a function of being destroyed and developing color upon being pressurized. 
   
   
       3 . The package for high pressure treatment according to  claim 1 , wherein said irreversible pressure-sensitive marker includes a base member, and a print material formed on said base member by printing and containing microcapsules with pigment sealed therein, said microcapsules having a function of being destroyed and developing color upon being pressurized. 
   
   
       4 . The package for high pressure treatment according to  claim 1 , wherein said package body includes a flanged container having a flange portion, and a top film bonded to said flange portion to maintain the articles accommodated within said flanged container in a sealed condition, and said irreversible pressure-sensitive marker is disposed on an outer surface of said flanged container or at a bonded portion of said top film. 
   
   
       5 . The package for high pressure treatment according to  claim 1 , wherein said package body includes a portion composed of a rigid material and having an installation surface, and said irreversible pressure-sensitive marker includes microcapsules disposed dispersedly on said installation surface of said package body and with pigment sealed therein and also includes a transparent film formed on said installation surface, said microcapsules having a function of being destroyed and developing color upon being pressurized. 
   
   
       6 . The package for high pressure treatment according to  claim 1 , wherein said package body includes a portion composed of a rigid material and having an installation surface, and said irreversible pressure-sensitive marker comprises a print material formed on said installation surface of said package body by printing and containing microcapsules with pigment sealed therein, said microcapsules having a function of being destroyed and developing color upon being pressurized. 
   
   
       7 . The package for high pressure treatment according to  claim 5 , wherein said package body includes a flanged container having a flange portion and also includes a top film bonded to said flange portion to maintain the articles accommodated within said flanged container in a sealed state, said flange portion being composed of a rigid material and having said installation surface. 
   
   
       8 . The package for high pressure treatment according to  claim 1 , further comprising an irreversible temperature-sensitive marker provided on said package body and adapted to develop color at a heat treatment temperature. 
   
   
       9 . The package for high pressure treatment according to  claim 1 , wherein said package body accommodates foods. 
   
   
       10 . A method for treating foods at a high pressure, comprising:
 accommodating foods within said package body of the package for high pressure treatment described in  claim 1 ; and   subjecting the package for high pressure treatment to a high pressure treatment in the accommodated state of the foods.   
   
   
       11 . A method for treating foods at a high pressure, comprising:
 accommodating foods within said package body of the package for high pressure treatment described in  claim 8 ; and   subjecting the package for high pressure treatment to both high pressure treatment and heat treatment in the accommodated state of the foods.   
   
   
       12 . The package for high pressure treatment according to  claim 6 , wherein said package body includes a flanged container having a flange portion and also includes a top film bonded to said flange portion to maintain the articles accommodated within said flanged container in a sealed state, said flange portion being composed of a rigid material and having said installation surface.