STERILIZABLE HEAT-SEALED CONTAINERS OF HIGH ETHYLENE RANDOM COPOLYMER FILMS AND PROCESSES

摘要

Heat-sealable containers or pouches of plastic film, which are heat-sterilizable at temperatures between about 120 °C and 130 °C and which reform their heat seals at such temperatures in order to retain the flexibility and resistance of the heat seals to rupture or leak under impact and/or compression forces. The novel pouches or containers are produced by superposing films of isotactic random reactant polymers of polypropylene containing from about 5% to about 20% by weight of ethylene, and heat sealing the films to each other to form containers or pouches on which the heat-seals remelt and reform during heat-sterilization at a temperature within the range of from about 120 °C to about 130 °C.