Stretchable spun-bonded polyolefin web

Details Stretchable spun-bonded polyolefin web Stretchable spun-bonded polyolefin web

1975-11-20

1977-03-22

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

128284, 156167, 264DIG75, 264210F, 428198, 428296, 428364, D04H 314

Patent

active

040138160

ABSTRACT:
This invention relates to a stretchable spun-bonded web suitable as top-liner for a disposable diaper, pad, bandage and the like, and a process for making the same. In particular, the invention relates to a polyolefin web where the crossover points of the fibers do not rupture when the web is stretched to 50% of its original length, but maintains approximately its original structure, which makes it extremely suitable for such applications. The web is made by melt blowing polypropylene of less than 1.2 intrinsic viscosity at a filament velocity of at least 15 meters per second on a smooth collecting surface having a temperature less than 65.degree. F.

REFERENCES:
patent: 3441468 (1969-04-01), Siggel et al.
patent: 3502763 (1970-03-01), Hartmann
patent: 3509009 (1970-04-01), Hartmann
patent: 3554854 (1971-01-01), Hartmann
patent: 3615998 (1971-10-01), Kolb
patent: 3806289 (1974-04-01), Schwartz
patent: 3825380 (1974-07-01), Harding et al.
patent: 3849241 (1974-11-01), Butin et al.
patent: 3918995 (1975-11-01), Palmer et al.

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