Method for the production of a polymer substrate with a fibrous surface
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United States of America Patent
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-
Jan 15, 1980
Issued Date -
N/A
app pub date -
Jan 9, 1978
filing date -
Mar 22, 1975
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a process for the production of thermoplastic substrate with fibrous surfaces. The fibers of these surfaces are formed by drawing away from a heated surface a molten polymer component backed by an unmelted polymer residue layer or substate. Simultaneous with the drawing, the nascent fibers are stabilized by cooling. For this purpose, cooling media are introduced in the fiber-forming zone. The thermoplastic polymer compounds should be applied in a thickness of at least 50 microns, and preferably 150 microns (when only 1 polymer forms the molten component), on a heated drawing surface of a drum or a conveyor belt apparatus. This invention relates to the production of fibrous surfaces on polymer substrates. Typically the substrates are in the form of webs. The use of webs makes the cooling process more efficient.
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