Claims
- 1. An elastane multifilament yarn with two to six individual filaments which, upon being unwound from a bobbin, is splittable into individual filaments and which is produced by an improved dry spinning process for producing an elastane multifilament yarn, wherein an elastane solution is dry spun to form the yarn, in which the improvement comprises reducing or preventing interfilamentary adhesion by1) deploying in the spinning head of a conventional dry spinning apparatus at least one multihole spinning jet whose individual capillaries are located on one plate, the distance x between capillaries on one jet plate and the distance y between capillaries on any adjacent multihole spinning jet plates conforming to the relationship 40 mm<x<y<500 mm, 2) laminarizing the gas flow in the dry spinning apparatus to prevent entangling of the individual filaments from adjacent multihole jets, 3) passing the resulting elastane yarns leaving the spinning shaft through a first thread guide with one opening per individual filament and then through a second thread guide which gathers a plurality of individual filaments together to form a multifilament, and 4) winding up the multifilament yarn, whereby the resulting elastane filaments are free from adhesion to one another.
- 2. An elastane multifilament yarn with two to six individual filaments which, upon being unwound from a bobbin, is splittable into individual filaments and which is produced in accordance with the process of claim 1, wherein the gas flow is laminarized by using a spinning head comprising a spinning jet having at least one capillary, feed line for the material to be spun, and a spinning gas supply and distribution system, and wherein the spinning gas supply comprises a central gas pipe, and the spinning gas distribution system comprises a cylindrical chamber in which the gas pipe ends; whose diameter is at least three times the diameter of the central gas pipe; whose height is not more than 25% of its diameter; which has a gas-permeable floor with a free area of 2 to 15%; and which, below the central gas pipe, accommodates an impingement plate system comprising a plurality of overlapping circular rings graded in diameter in a spaced-apart horizontal and concentric arrangement and a circular plate and wherein said first thread guide used is an eyelet plate and said second thread guide used is a guide of a comb type, and the elastane multifilament yarn comprises two individual filaments and has a linear density of 30-50 dtex.
Priority Claims (1)
Number |
Date |
Country |
Kind |
195 27 436 |
Jul 1995 |
DE |
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Parent Case Info
This application is a division of application Ser. No. 08/648,473, filed on May 16, 1996, now U.S. Pat. No. 5,723,080 issued Mar. 3, 1998.
US Referenced Citations (4)