Absorbent, extruded thermoplastic foams

Details Absorbent, extruded thermoplastic foams Absorbent, extruded thermoplastic foams

1998-06-11

2000-06-06

Acquah, Samuel A.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

521 74, 521 79, 521142, 428 341, 428 343, 428 348, 428 357, 604369, 604370, 604372, B29D 2200, A61F 1315, C08J 900

Patent

active

060715804

ABSTRACT:
Disclosed is an absorbent, extruded, open cell thermoplastic foam. The foam has an open cell content of about 50 percent or more and an average cell size of up to about 1.5 millimeters. The foam is capable of absorbing a liquid at about 50 percent or more of its theoretical volume capacity when absorbing a liquid. The foam preferably has an average equivalent pore size of about 5 micrometers or more. The foam preferably has a structure substantially of cell walls and cell struts. Further disclosed is a method for absorbing a liquid employing the foam by elongation of the extrudate of the extrusion die. Further disclosed is a method of enhancing absorbency of an open cell foam by applying a surfactant to an exposed surface of the foam such that it remains at the surface and does not infiltrate a substantial distance into the foam. Further disclosed is a meat tray and a diaper containing the foam.

REFERENCES:
patent: 5260345 (1993-11-01), DesMarais et al.
patent: 5338766 (1994-08-01), Phan et al.
patent: 5573994 (1996-11-01), Kabra et al.
patent: 5618853 (1997-04-01), Vonken et al.
Derwent Abstract No. 83-784429/41 to EP 090.507A.

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