Duplex-Chamber Package

Abstract

This invention provides a duplex-chamber package that has a high level of water vapor barrier properties, can realize mixing of plural contents in a hermetically sealed state, and can reduce the elution of a material contained in the sheet of a duplex-chamber package material into the contents of the package. The duplex-chamber package comprises a package comprising a first sheet superimposed onto a second sheet, the peripheral part of the assembly having been sealed, a weakly sealed part for partitioning the inside of the package into two or more chambers having been provided in a part of the package. The first sheet (I) is a laminated sheet comprising a heat seal layer, a mass transfer layer and a mass transfer blocking layer, and the mass transfer blocking layer being interposed between the heat seal layer and the mass transfer layer. The second sheet (II) is a laminated sheet comprising a heat seal layer, a mass transfer layer, a mass transfer blocking layer and a moisture blocking layer, and the mass transfer blocking layer being interposed between the heat seal layer and the mass transfer layer.

1 . A duplex-chamber package comprising a package comprising a first sheet and a second sheet being superimposed each other with a peripheral portion of the sheets being sealed, and an inside of the package being partitioned into plural chambers by means of a weakly sealed portion provided at a part of the facing inner wall surfaces of the package, wherein the first sheet and the second sheet are respectively formed of a first laminated sheet (I) and a second laminated sheet (II):
 (I) a laminated sheet comprising a heat seal layer forming the inner wall surface of the package, a mass transfer layer and a mass transfer blocking layer, and the mass transfer blocking layer being interposed between the heat seal layer and the mass transfer layer; and   (II) a laminated sheet comprising a heat seal layer forming the inner wall surface of the package, a mass transfer layer, a mass transfer blocking layer and a moisture blocking layer comprising metallic components, and the mass transfer blocking layer being interposed between the heat seal layer and the mass transfer layer.   
   
   
       2 . A duplex-chamber package comprising a container (X) and a container (Y) formed respectively such that a first sheet and a second sheet are superimposed each other with a sealed portion being formed along a peripheral portion of the sheets and a weakly sealed portion being formed at a part of the facing inner wall surfaces of the package, both containers being so connected as to be communicable with each other at the insides thereof when the weakly sealed portions of the respective containers are separated from each other, wherein the connection is formed by means of sealing between the inner wall surface of the container (X) and the outer wall surface of the other container (Y), and the first sheet and the second sheet, at least for the container (X), are respectively formed of a first laminated sheet (I) and a second laminated sheet (II):
 (I) a laminated sheet comprising a heat seal layer forming the inner wall surface of the package, a mass transfer layer and a mass transfer blocking layer, the mass transfer blocking layer being interposed between the heat seal layer and the mass transfer layer; and   (II) a laminated sheet comprising a heat seal layer forming the inner wall surface of the package, a mass transfer layer, a mass transfer blocking layer and a moisture blocking layer comprising metallic components, and the mass transfer blocking layer being interposed between the heat seal layer and the mass transfer layer.   
   
   
       3 . The duplex-chamber package according to  claim 1 , wherein the laminated sheet (I) further comprising a moisture blocking layer. 
   
   
       4 . The duplex-chamber package according to  claim 2 , wherein the laminated sheet (I) further comprising a moisture blocking layer. 
   
   
       5 . The duplex-chamber package according to  claim 1 , wherein a total light transmittance in a normal direction of the surface of said laminated sheet (I) is not lower than 70%. 
   
   
       6 . The duplex-chamber package according to  claim 2 , wherein a total light transmittance in a normal direction of the surface of said laminated sheet (I) is not lower than 70%. 
   
   
       7 . The duplex-chamber package according to  claim 1 , wherein said mass transfer layer and said mass transfer blocking layer are bonded with an adhesive resin. 
   
   
       8 . The duplex-chamber package according to  claim 2 , wherein said mass transfer layer and said mass transfer blocking layer are bonded with an adhesive resin. 
   
   
       9 . The duplex-chamber package according to  claim 1 , wherein said mass transfer blocking layer and/or said heat seal layer comprise(s) a cyclic polyolefin composition as a main component. 
   
   
       10 . The duplex-chamber package according to  claim 2 , wherein said mass transfer blocking layer and/or said heat seal layer comprise(s) a cyclic polyolefin composition as a main component. 
   
   
       11 . The duplex-chamber package according to  claim 1 , wherein said mass transfer blocking layer and/or said heat seal layer comprise(s) polytetrafluoroethylene and/or ultrahigh molecular weight polyethylene as a main component. 
   
   
       12 . The duplex-chamber package according to  claim 2 , wherein said mass transfer blocking layer and/or said heat seal layer comprise(s) polytetrafluoroethylene and/or ultrahigh molecular weight polyethylene as a main component. 
   
   
       13 . The duplex-chamber package according to  claim 6 , wherein said cyclic polyolefin composition comprises the following components (A) and (B):
 (A) a cyclic polyolefin having a glass transition temperature of lower than 100° C.; and   (B) a cyclic polyolefin having a glass transition temperature of not lower than 100° C.   
   
   
       14 . The duplex-chamber package according to  claim 7 , wherein said cyclic polyolefin composition comprises the following components (A) and (B):
 (A) a cyclic polyolefin having a glass transition temperature of lower than 100° C.; and   (B) a cyclic polyolefin having a glass transition temperature of not lower than 100° C.   
   
   
       15 . The duplex-chamber package according to  claim 1 , wherein said weakly sealed portion is formed by thermocompression bonding, from outside of the package, the facing inner wall surfaces of the package. 
   
   
       16 . The duplex-chamber package according to  claim 2 , wherein said weakly sealed portion is formed by thermocompression bonding, from outside of the package, the facing inner wall surfaces of the package. 
   
   
       17 . The duplex-chamber package according to  claim 1 , wherein said weakly sealed portion is formed by inserting a tape between the facing inner wall surfaces of the package, and then subjecting the inserted portion to thermocompression bonding from outside of the package, said tape comprises at least a surface layer containing the following component (A) and/or (B):
 (A) a cyclic polyolefin having a glass transition temperature of lower than 100° C.; and   (B) a cyclic polyolefin having a glass transition temperature of not lower than 100° C.   
   
   
       18 . The duplex-chamber package according to  claim 2 , wherein said weakly sealed portion is formed by inserting a tape between the facing inner wall surfaces of the package, and then subjecting the inserted portion to thermocompression bonding from outside of the package, said tape comprises at least a surface layer containing the following component (A) and/or (B):
 (A) a cyclic polyolefin having a glass transition temperature of lower than 100° C.; and   (B) a cyclic polyolefin having a glass transition temperature of not lower than 100° C.   
   
   
       19 . The duplex-chamber package according to  claim 1 , wherein said duplex-chamber container is in medical use. 
   
   
       20 . The duplex-chamber package according to  claim 2 , wherein said duplex-chamber container is in medical use.