Multilayer film and cell culture container

Abstract

Provided are a multilayer film having excellent gas permeability and excellent handling properties and hence is suited for forming a cell culture container, and a cell culture container formed by using the same. A multilayer film used for forming a cell culture container, comprising: a base material composed of a polyethylene-based resin having a density of 0.87 g/cm 3 to 0.90 g/cm 3 ; and an inner layer composed of a polyethylene-based resin having a density of 0.896 g/cm 3 to 0.93 g/cm 3 and forming a cell culture surface. A cell culture container is formed by using this multilayer film.

1 . A multilayer film used for forming a cell culture container, comprising:
 a base material composed of a polyethylene-based resin having a density of 0.87 g/cm 3  to 0.90 g/cm 3 ; and   an inner layer composed of a polyethylene-based resin having a density of 0.896 g/cm 3  0.93 g/cm 3  and forming the cell culture surface   
     
     
         2 . The multilayer film according to  claim 1  which has at least three layers and has an outer layer composed of a polyethylene-based resin having a density of 0.886 g/cm 3  to 0.93 g/cm 3 . 
     
     
         3 . The multilayer film according to  claim 1  wherein the density of the polyethylene-based film as the base material is 0.87 g/cm  3 to 0.885 g/cm 3 . 
     
     
         4 . The multilayer film according to  claim 1 , wherein the thickness of the base material relative to the thickness of the multilayer film is 60% or more. 
     
     
         5 . The multilayer film according to  claim 1 , wherein the oxygen permeability is 750 ml·mm/m 2 ·day·atm or more (37° C.-80% RH). 
     
     
         6 . The multilayer film according to  claim 1 , wherein the carbon dioxide permeability is 2100 ml·mm/m 2 ·day·atm or more (37° C.-80% RH), 
     
     
         7 . The multilayer film according to any of  claim 1 , wherein the inner layer forming the cell culture surface does not comprise an anti-blocking agent and/or a slipping agent and/or a lubricant. 
     
     
         8 . A cell culture container formed by the multilayer film according to  claim 1 . 
     
     
         9 . The cell culture container according to  claim 8 , wherein the multilayer film forming the container is 150 μm or less.