Multi-layered plastic container produced by coextrusion blow-mol

Details Multi-layered plastic container produced by coextrusion blow-mol Multi-layered plastic container produced by coextrusion blow-mol

1988-09-22

1991-05-07

Marcus, Stephen

Receptacles

Sidewall structure

Sidewall seam or joint

220689, B29C 1707

Patent

active

050129449

ABSTRACT:
An arrangement is disclosed for improving the seam strength of plastic containers produced by coextrusion blow-molding which are provided with a diffusion barrier layer incompatible with the base material. To improve the seam strength, the same is therefore designed as a web seam which is folded in labyrinthal shape and the folds of which are welded to each other. The length of the web seam in the unfolded state is equivalent to at least three times the thickness of the coextrudate and the web seam is folded at least doubly.

REFERENCES:
patent: 3547294 (1970-12-01), Williams
patent: 3977153 (1976-08-01), Schrenk
patent: 4281769 (1981-08-01), Ignell
patent: 4378328 (1983-03-01), Przytulla et al.
patent: 4501781 (1985-02-01), Kushida et al.
patent: 4554190 (1985-11-01), McHenry et al.
patent: 4796766 (1989-01-01), Clark

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