초록 ▼

This invention relates to a method of strengthening glass articles and, more specifically, hollow glass containers such as jars for containing foodstuffs. The invention is directed to a method wherein the hollow glass container is surrounded at its heel and bearing surfaces with a thin continuous fr

This invention relates to a method of strengthening glass articles and, more specifically, hollow glass containers such as jars for containing foodstuffs. The invention is directed to a method wherein the hollow glass container is surrounded at its heel and bearing surfaces with a thin continuous frangible coating of a polymeric resin such as an epoxy resin. The resin is cured into a frangible thermoset condition to resist thermal shock breakage; however, any breakage of the container at its coated area will result in disruption of the surrounding coating evidencing such breakage. The coating is extremely thin and continuous, and readily applied, and may be used in combination with a foamed thermoplastic tubular sleeve snugly conforming to the body portion of the container. The conforming sleeve serves as a label and to provide an insulating jacket for handling the container when its contents are heated, such as in a microwave oven. The thin coating serves to increase the thermal shock strength of the container and to prevent its thermal shock breakage, but to evidence same when and if such event should occur.

대표청구항 ▼

The method of increasing the effective strength of a soda-lime glass container for its use in heating contents comprising the step of surrounding the heel and bearing surfaces of said glass container with a thin imperforate frangible coating of a thermoset polymeric resin having a thickness ranging

The method of increasing the effective strength of a soda-lime glass container for its use in heating contents comprising the step of surrounding the heel and bearing surfaces of said glass container with a thin imperforate frangible coating of a thermoset polymeric resin having a thickness ranging from about 1 to 5 mils said coating making said container thermal shock-resistant and being non-fragment retentive upon breakage of said container. A thermal shock-resistant soda-lime glass container adapted to heating contents therein comprising a hollow glass container having a wide-mouth and generally-cylindrical sidewalls and a thin imperforate frangible coating of a thermoset polymeric over at least the heel and bearing surfaces of said glass container, said coating having a thickness ranging from about 1 to 5 mils said coating being rupturable and substantially non-fragment retentive upon breakage of said container.