초록 ▼

Plastic containers are treated to provide increased barrier properties to organics and gases such as oxygen by treating the interior surface of the container with SO3 gas. The SO3 gas is provided by inserting a solid pellet of poly-SO3 into the container and evaporating the SO3 such as with microwav

Plastic containers are treated to provide increased barrier properties to organics and gases such as oxygen by treating the interior surface of the container with SO3 gas. The SO3 gas is provided by inserting a solid pellet of poly-SO3 into the container and evaporating the SO3 such as with microwave energy. A solid neutralizing agent such as ammonium carbonate is then placed into the container and evaporated with microwave energy to form ammonia which neutralizes the sulfonic acid groups on the surface interior of the container.

대표청구항 ▼

An improvement in the method of sulfonating the interior surface of an enclosure member formed of a resinous organic polymer which is capable of being surface sulfonated when contacted with SO3 vapors wherein the interior surface is contacted with a sufficient quantity of gaseous SO3 to thereby form

An improvement in the method of sulfonating the interior surface of an enclosure member formed of a resinous organic polymer which is capable of being surface sulfonated when contacted with SO3 vapors wherein the interior surface is contacted with a sufficient quantity of gaseous SO3 to thereby form sulfonic acid groups along the backbone of the resinous organic polymer, the improvement which comprises: introducing into the interior of the enclosure member a solid particulate form of a sulfur trioxide and heating said solid material to form a sufficient quantity of sulfur trioxide gas to react with at least a portion of the interior surface of said enclosure member thereby forming said sulfonic acid groups attached to the resinous organic polymer.