Vented recyclable multilayer barrier container, an apparatus for

Details Vented recyclable multilayer barrier container, an apparatus for Vented recyclable multilayer barrier container, an apparatus for

1989-12-21

1990-12-25

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264154, 264156, 264512, 264513, B29C 4922, B29C 4942

Patent

active

049801007

ABSTRACT:
Blow molded plastic containers where at least the body of such containers is of a laminated construction including, for example, a barrier layer which in the case of the container receiving carbonated products would be a gas barrier layer. It has been found that delamination does occur and this is now solved by selectively providing the container body with minute vent openings which do not extend entirely through the container body, but into that area where delamination occurs and there is an accumulation of a permeant, such as CO.sub.2. The minute vents may be formed in the exterior wall of the container either by way of piercing pins or by utilizing a laser. In the case of the piercing pins, there are incorporated in the blow mold for blow molding the container from a preform and are generally placed along the parting lines of the blow mold and also in central parts of the wall. The construction and operation of the piercing pins may be provided in several forms.

REFERENCES:
patent: 2917197 (1959-12-01), Glover et al.
patent: 2929525 (1960-03-01), Glover et al.
patent: 3409710 (1968-11-01), Klygis
patent: 3457337 (1969-07-01), Turner
patent: 4079850 (1978-03-01), Suzuki et al.

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