Stretched film of void-containing thermoplastic resin and process for producing the same

Abstract

To provide a stretched film of void-containing thermoplastic resin having an attractive force between sheets is 50 g or less. The stretched film of void-containing thermoplastic resin has no charge therein and can be processed secondarily with lesser electrostatic disturbance even in a low-humidity environment.

1 . A stretched film of a void-containing thermoplastic resin having an attractive force between sheets of the film, wherein the attractive force is 50 g or less.  
     
     
         2 . The stretched film of  claim 1 , having a charge potential of the film surface after discharging of the film, wherein the charge potential is −10 to 10 kV.  
     
     
         3 . The stretched film of  claim 1 , having a rate of voids of 0.1 to 60%.  
     
     
         4 . The stretched film of  claim 1 , having an opacity of 5 to 100%.  
     
     
         5 . The stretched film of  claim 1 , wherein the thermoplastic resin is a polyolefin resin.  
     
     
         6 . The stretched film of  claim 1 , containing an inorganic fine powder and/or an organic filler.  
     
     
         7 . The stretched film of  claim 6 , containing 0.1 to 65 wt % of the inorganic fine powder and/or the organic filler.  
     
     
         8 . The stretched film of  claim 1 , wherein the film is stretched in at least one direction.  
     
     
         9 . The stretched film of  claim 1 , wherein at least one layer constituting the stretched film of void-containing thermoplastic resin contains an antistatic agent.  
     
     
         10 . An in-mold-forming label, comprising the stretched film of void-containing thermoplastic resin having an attractive force between sheets of the film, wherein the attractive force is 50 g or less.  
     
     
         11 . A resin container on which is adhered an in-mold-forming label comprising the stretched film of void-containing thermoplastic resin having an attractive force between sheets of the film, wherein the attractive force is 50 g or less.  
     
     
         12 . A process for producing the stretched film of void-containing thermoplastic resin having an attractive force between sheets of the film, wherein the attractive force is 50 g or less, which process comprises a discharging step to apply a direct-current voltage overlaid on a high voltage of high frequency to the stretched film of void-containing thermoplastic resin.  
     
     
         13 . A process for producing the stretched film of void-containing thermoplastic resin having an attractive force between sheets of the film, wherein the attractive force is 50 g or less, which comprises a discharging step of applying a direct-current voltage overlaid on a high voltage of high frequency to the stretched film of void-containing thermoplastic resin, and a subsequent step of coating an antistatic agent on at least one side of the film.  
     
     
         14 . A process for producing the stretched film of void-containing thermoplastic resin having an attractive force between sheets of the film, wherein the attractive force is 50 g or less, which comprises a discharging step of applying a direct-current voltage overlaid on a high voltage of high frequency to the stretched film of void-containing thermoplastic resin, and a subsequent step of coating a pigment on at least one side of the film.