Polystyrene foam sheet manufacture

Details Polystyrene foam sheet manufacture Polystyrene foam sheet manufacture

1997-10-06

1999-07-20

Zirker, Daniel

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264 51, 264230, 264342R, 264342RE, B32B 326, B29C 4100, B29C 1700

Patent

active

059254505

ABSTRACT:
The method of making polystyrene foam for foam products which comprises utilizing atmospheric gases as the blowing agents or preferably mixing one or more of these gases and a blending agent which is non-volatile at the extrusion temperatures, introducing the mixture to a molten thermoplastic polystyrene resin containing nucleating agents such as sodium bicarbonate and citric acid and extruding the thermoplastic in the form of a foam. The resultant foam has substantially no residual blowing agent, is dimensionally stable at ambient temperatures and when used with a non-volatile blending agent can be made with small amounts of blowing agent permitting cooling of the melt without high loading on the extruder. The foam may be coextruded with one or more layers of thermoplastic film so that the resultant product is adapted for use for plates, cups, food containers or packaging and for labels for containers such as glass and plastic containers and for labels that are shrunk in place on a container.

REFERENCES:
patent: 3796779 (1974-03-01), Greenberg
patent: 4049768 (1977-09-01), Luthra
patent: 4424287 (1984-01-01), Johnson et al.
patent: 4436679 (1984-03-01), Winstead
patent: 4486366 (1984-12-01), Reddy
patent: 4657715 (1987-04-01), Myers et al.
patent: 4663107 (1987-05-01), Takada et al.
patent: 4747983 (1988-05-01), Colombo
patent: 5082608 (1992-01-01), Karabedian et al.
patent: 5443769 (1995-08-01), Karabedian et al.
patent: 5674602 (1997-10-01), Karabedian et al.

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