Resin composition, and container packaging film, container packaging bag and container package using the resin composition

Abstract

The present invention is aimed to provide a resin composition suitable for a container packaging film that has excellent appearance and antiblocking properties, and has no fear of contamination into the container. The present invention relates to resin composition comprising from 40 to 90 mass % of a propylene-base polymer and from 10 to 60 mass % of a high-density polyethylene (the total of the propylene-base polymer and the high-density polyethylene is 100 mass %), the composition substantially not containing a lubricant and not containing an antiblocking agent, and the ratio of MFR of the propylene-base polymer at 230° C. to MFR of the high-density polyethylene at 190° C. being from 5 to 200. The present invention also relates to a container packaging film, sealant film, laminate, container packaging bag, and container package using the resin composition of the present invention.

1 . (Cancelled)  
     
     
         2 . A container packaging film made from: (a) a sealant layer made from a composition comprising a propylene-base polymer and a high-density polyethylene, and substantially not containing a lubricant and not containing an antiblocking agent, and (b) a support layer made from propylene-ethylene block copolymer; said container packaging film having the coefficient of kinetic friction between the container packaging films after high pressure steam sterilization at 125° C. for 30 min. being 0.4 or less.  
     
     
         3 . A container packaging film as claimed in  claim 2 , wherein said composition comprises from 40 to 90 mass % of a propylene-base polymer and from 10 to 60 mass % of a high-density polyethylene (the total of the propylene-base polymer and the high-density polyethylene constitute 100 mass %), the ratio of MFR of the propylene-base polymer at 230° C. to MFR of the high-density polyethylene at 190° C. being from 5 to 200.  
     
     
         4 . (Cancelled)  
     
     
         5 . A laminate comprising a layer composed of the container packaging film claimed in  claim 2  or  3 , and at least one layer selected from the group consisting of a gas barrier layer, a printing layer and a protective layer.  
     
     
         6 . A container packaging bag comprising a container packaging film according to  claim 2  or  3 , wherein the surface of the film coming into contact with a container is the sealant layer of the container packaging film.  
     
     
         7 . A container package, wherein a container is housed in the container packaging bag claimed in  claim 6  and is subjected to high-pressure steam sterilization.  
     
     
         8 . The container package as claimed in  claim 7 , wherein the high-pressure steam sterilization temperature is 121° C. or more.  
     
     
         9 . The container package as claimed in  claim 7 , wherein the container is a medical container.  
     
     
         10 . The container package as claimed in  claim 9 , wherein the outer surface of the container, coming into contact with the container packaging bag is composed of a propylene-based polymer.  
     
     
         11 . The container package as claimed in  claim 7 , wherein the inside of the container package is depressurized.  
     
     
         12 . The container package as claimed in  claim 11 , wherein the container is a medical container.  
     
     
         13 . The container package as claimed in  claim 11 , wherein the outer surface of the container coming into contact with the container packaging bag is composed of a propylene-base polymer.  
     
     
         14 . The container package as claimed in  claim 8 , wherein the container is a medical container.  
     
     
         15 . The container package as claimed in  claim 14 , wherein the outer surface of the container coming into contact with the container packaging bag is composed of a propylene-based polymer.  
     
     
         16 . The container package as claimed in  claim 8 , wherein the inside of the container package is depressurized.  
     
     
         17 . The container package as claimed in  claim 16 , wherein the container is a medical container.  
     
     
         18 . The container package as claimed in  claim 16 , wherein the outer surface of the container coming into contact with the container packaging bag is composed of a propylene-base polymer.