PET container for foods and drinks containing recycled resin and having DLC coating film formed on surface thereof

Abstract

A PET container for foods and drinks having a DLC coating film formed on the inner surface thereof, characterized in that the PET container for foods and drinks is produced by the use of a molding material comprising a mixture of a recycled resin which is originated from a used PET container for foods and drinks and has not subjected to a treatment for adjusting its intrinsic viscosity with a fresh PET resin. The above PET container for foods and drinks can provide satisfactory barrier properties against a pollutant substance being present in a resin.

1 . (canceled)  
   
   
       2 . (canceled)  
   
   
       3 . (canceled)  
   
   
       4 . A method of manufacturing a DLC film coated PET container for foods and beverages containing recycled resin, comprising the steps of: 
 shredding used PET containers for foods and beverages to form flakes, and then removing foreign material from said flakes, washing said flakes using an alkaline washing agent and water, and drying said flakes to obtain washed flakes;    obtaining recycled pellets which have not undergone intrinsic viscosity adjustment from said washed flakes;    molding a container containing recycled resin using said recycled resin pellets and un used PET resin pellets adjusted so that the compounding ratio (weight of recycled resin pellets/weight of recycled resin pellets+weight of unused PET resin pellets) is greater than 0 but less than 0.40; and    coating the inner surface of said container with a DLC film so that oxygen permeability of said container is less than or equal to 0.01 ml/day/container when converted to a 500 ml volume.    
   
   
       5 . A method of manufacturing a DLC film coated PET container for foods and beverages containing recycled PET resin as defined in  claim 4  wherein said film coated PET container comprises from 10% to 40% of recycled PET.