| 摘要 |
A process for the manufacture, in an injection moulding process, of articles having barrier properties, is disclosed. The process comprises feeding an admixture of 20-87.5 percent of polyethylene and/or ethylene/vinyl acetate copolymer, 5-40 percent of at least one of polyamide, ethylene/vinyl alcohol copolymer, polyvinyl alcohol and polyester, and 7.5-40 percent of an alkylcarboxyl-substituted polyolefin to injection moulding apparatus, heating the admixture to a temperature above the melting point of all components of the admixture under conditions that minimize admixing of the admixture and then injecting the resultant heterogeneous molten mixture into a mould. The process may be used to manufacture articles e.g. containers, intended for use with foodstuffs and the like that have improved barrier properties with respect to a number of substances e.g. oxygen. |
