Treatment of the interior surfaces of resinous enclosure members

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component

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428 35, 4283179, 4283191, B32B 326

Patent

active

047755873

ABSTRACT:
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 SO.sub.3 gas. The SO.sub.3 gas is provided by inserting a solid pellet of poly-SO.sub.3 into the container and evaporating the SO.sub.3 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.

REFERENCES:
patent: 2832696 (1958-04-01), Walles
patent: 3613957 (1971-10-01), Walles
patent: 3770706 (1973-11-01), Walles
patent: 3940377 (1976-02-01), Horowitz et al.
patent: 4220739 (1980-09-01), Walles
patent: 4425460 (1984-01-01), Makowski et al.

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