Apparatus for stretching a non-woven web or an orientable polyme

Details Apparatus for stretching a non-woven web or an orientable polyme Apparatus for stretching a non-woven web or an orientable polyme

1980-01-11

1981-08-25

Mackey, Robert

Textiles: fiber preparation

Assembling

Formed web

26 72, 28103, B29D 724

Patent

active

042851009

ABSTRACT:
There is described in a preferred embodiment of the present invention, a process and apparatus for bi-axially stretching a non-woven web of synthetic fibers in a first and second station wherein the first and second stations are provided with sets of rolls having grooves parallel and perpendicular, respectively, to the axis of each set of rolls. The groove pattern of the rolls is generally a sinosoidal wave with distances between grooves of less than 1.0 millimeters times the web basis weight in grams per square meter.

REFERENCES:
patent: 3421189 (1969-01-01), Schiffer
patent: 3545054 (1970-12-01), Sando et al.
patent: 4003684 (1977-01-01), Muller et al.
patent: 4116892 (1978-09-01), Schwarz
patent: 4144008 (1979-03-01), Schwarz
patent: 4223059 (1980-09-01), Schwarz

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