Heat-sealed closure for polyester container and container having

Details Heat-sealed closure for polyester container and container having Heat-sealed closure for polyester container and container having

1990-06-12

1993-04-20

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428344, 428353, 428355, 428416, B32B 712, B32B 1504

Patent

active

052041816

ABSTRACT:
The present invention provides a strong heat seal to a thermoplastic polyester container which can withstand hot water treatment such as retorting, and to a heat sealed container. A heat-sealable closure is also provided. It is composed of a laminate consisting of a heat-seal layer comprising as a main component a copolymerized polyester resin having a softening temperature of 120.degree. C. and a glass-transition temperature of 30.degree. to 85.degree. C., a metal substrate, and an epoxy-phenol resin primer layer interposed between them.
Preferably, the container has a heat seal portion composed of a thermoplastic polyester having a fusion temperature in the crystalline state of at least 200.degree. C. This polyester portion is oriented and crystallized or heat-crystallized.

REFERENCES:
patent: 4310578 (1982-01-01), Katsura et al.
patent: 4765999 (1988-08-01), Winer
patent: 4921764 (1990-05-01), Rudd et al.
patent: 4946743 (1990-08-01), Winter

Affiliated with

Also associated with

Rating

Heat-sealed closure for polyester container and container having does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heat-sealed closure for polyester container and container having, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat-sealed closure for polyester container and container having will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1525069