초록 ▼

A blend of nylon and ethylene vinyl alcohol copolymer is provided which is suitable for conversion into films having desirable levels of strength and toughness, and good oxygen barrier properties. In addition, the blend exhibits enhanced adhesive qualities, as compared to films of EVOH copolymer per

A blend of nylon and ethylene vinyl alcohol copolymer is provided which is suitable for conversion into films having desirable levels of strength and toughness, and good oxygen barrier properties. In addition, the blend exhibits enhanced adhesive qualities, as compared to films of EVOH copolymer per se, thus better adapting it for use in multilayer films. Methods for fabricating the resin blend into bare and composite films are also provided.

대표청구항 ▼

In a method for the production of a film having relatively high levels of strength and toughness and good oxygen barrier properties, the steps comprising: a. forming a blend of about 90 to 20 weight percent of a film-forming polyamide resin having a molecular weight of about 20,000 to 30,000 and a m

In a method for the production of a film having relatively high levels of strength and toughness and good oxygen barrier properties, the steps comprising: a. forming a blend of about 90 to 20 weight percent of a film-forming polyamide resin having a molecular weight of about 20,000 to 30,000 and a melting point temperature of about 415 degrees to 440 degrees Fahrenheit, conversely about 10 to 80 weight percent of an ethylene vinyl alcohol copolymer having a molecular weight of about 15,000 to 30,000 and a melting point temperature of about 325 degrees to 375 degrees Fahrenheit, and about 2 to 25 percent, based upon the weight of said polyamide resin, of a plasticizer therefor, said plasticizer being effective to lower the processing temperature of said polyamide resin to a value approximately that of said copolymer and below the temperature at which any sustantial amount of degradation would occur therein under appropriate conditions for extrusion; b. heating said blend to said processing temperature; c. forcing said blend through an extrusion die to produce a film of said blend; and d. cooling said film to obtain a product having such desirable levels of toughness and oxygen barrier capability.