Reinforced container

Details Reinforced container Reinforced container

1984-06-01

1986-05-06

Moy, Joseph Man-Fu

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

229 45, 229DIG9, 229 17G, B65D 540

Patent

active

045866430

ABSTRACT:
A reinforced blank for liquids and a method of producing said blank. The score lines which hinge the bottom closure panels to the side walls is reinforced. The container has a polyethylene coating and the reinforcing material must be compatable with the polyethylene coating. It must be able to stick to the polyethylene. It must be able to be processed and placed on the polyethylene within the existing process. It must have a quick cure time, around a half second, and it must be nonflammable because of the flame sealers used to later form the container. It must be easy to apply at speeds of about 600 feet a minute and it must be a resin that does not activate. The resins applicable have viscosities from 18,000 to 26,000 centipoises and have from 65-85% polyethylene, a small amount of vinyl acetate as either polyvinyl acetate or ethyl vinyl acetate and the remainder a polypropylene/polyisobutylene copolymer.

REFERENCES:
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patent: 3913826 (1975-10-01), Brownlee et al.
patent: 4211339 (1980-07-01), Holt
patent: 4489112 (1984-12-01), Nise et al.

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