Nonwoven polypropylene fabric and process

Details Nonwoven polypropylene fabric and process Nonwoven polypropylene fabric and process

1977-03-30

1978-04-25

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including grain, strips, or filamentary elements in...

156167, 156306, 428192, 428286, 428288, 428298, 428910, B32B 512

Patent

active

040863816

ABSTRACT:
There is disclosed a bonded, nonwoven sheet of continuous isotactic polypropylene filaments having a nonselvage portion with specified properties rendering the sheet useful as a carpet backing, said properties including an average bond strength, for bonds having a strength greater than 0.1 gram, of at least 0.9 gram and less than the fiber breaking strength, the sheet being characterized by a selvage having an average bond strength which is from about 15-400% greater than the average bond strength of the non-selvage portion of said sheet. There is also disclosed a process for producing said sheet.

REFERENCES:
patent: 3360421 (1967-12-01), Sands
patent: 3502538 (1970-03-01), Peterson
patent: 3821062 (1972-02-01), Henderson
patent: 3895151 (1975-07-01), Matthews et al.
patent: 3991244 (1976-11-01), Debbas
patent: 3993812 (1976-11-01), Debbas et al.

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