Floor coverings and films for use therein

Details Floor coverings and films for use therein Floor coverings and films for use therein

1996-11-21

1999-09-28

Thibodeau, Paul

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428213, 428220, 428515, 428516, 428203, 428206, 428520, 26417312, 26417314, E04F 1500, B32B 2720

Patent

active

059585633

ABSTRACT:
A thermoplastic solid backing film manufactured by the co-extrusion of three polymer compositions wherein die-lip build up is avoided by adjusting the amount of filler present in each polymer composition. The first and third polymer compositions are such that substantially no die-lip build up occurs when these compositions are extruded through a die however the second polymer composition is such that there would be substantial die-lip build up if it was extruded adjacent a die-lip. The presence of the first and third polymer compositions prevents the second polymer composition from contacting the die-lip during manufacture of the backing film. The thermoplastic solid backing film can be incorporated in a resilient floor covering and in floor tiles.

REFERENCES:
patent: 3660216 (1972-05-01), Theodorson
patent: 4263080 (1981-04-01), Whiting, Jr.
patent: 5316861 (1994-05-01), Marchal et al.
patent: 5728476 (1998-03-01), Harwood et al.
Derwent WPI Accession No. AN 82-91107E & JP 57 149 564 A, Sep. 1982.
Derwent WPI Accession No. An 85-033479 & JP 59 225 952 A, Dec. 1984.
Ulmann's Encyclopedia of Industrial Chemistry vol. A11--Editor Gerhartz.

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