Pouch made of coextruded polymers

Details Pouch made of coextruded polymers Pouch made of coextruded polymers

1974-05-17

1976-02-24

Dixson, Jr., William T.

Special receptacle or package

For mixing

206245, 206260, 229 48T, B65D 2508

Patent

active

039399729

ABSTRACT:
A pouch is formed from a section of coextruded polymer tubing, which is pressed flat, folded over along a longitudial axis, and heat sealed along the sides, whereby the opposed walls of the pouch are each composed of two thicknesses of the coextruded material.
The outermost laminate of the coextruded tubing that form the innermost and outermost surfaces of the pouch walls is composed of a polymer, such as low density polyethylene, which can be rapidly and reliably heat sealed in the formation of the pouch, with the outermost surface being suitable for printing. The inner laminate, which is encapsulated by the outer laminate, is composed of one of a group of polymers which have relatively poor heat sealing properties but otherwise provide toughness, puncture resistance, gas and vapor barrier properties or coloration to the pouch, such as polyamides, ionomers, pigmented polyolefins and medium and high density polyethylenes.

REFERENCES:
patent: 3300120 (1967-01-01), McColgan
patent: 3321125 (1967-05-01), Quackenbush et al.
patent: 3638784 (1972-02-01), Bodolay et al.
patent: 3844409 (1974-10-01), Bodolay et al.

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