Process for making a sized multifilament yarn of an aromatic pol

Details Process for making a sized multifilament yarn of an aromatic pol Process for making a sized multifilament yarn of an aromatic pol

1984-04-12

1985-07-30

Lawrence, Evan K.

Coating processes

With stretching or tensioning

Running lengths

57297, 427177, 427299, 427316, 427412, 427416, B05D 312, B05D 702

Patent

active

045321540

ABSTRACT:
A multifilament yarn of an aromatic polyamide, in particular poly-p-phenylene terephthalamide, having a tenacity of at least 15 cN/dtex and an initial modulus of at least 400 cN/dtex is provided with a water-soluble size, the filaments of the yarn having a cohesion corresponding to a Manra number not higher than 40. The yarn is made by subjecting a non-sized yarn having a moisture content which is lower than its equilibrium moisture content, while under a tension of at most 0.25 cN/dtex, to a continuous wetting treatment with an aqueous solution of a size and subsequently winding the treated yarn into a yarn package. The yarn package contains a single continuous length of the sized yarn. The sized yarn is suitable as warp and weft yarn in the weaving industry.

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Baumeister, T. et al., (Ed.), "Marks' Standard Handbook for Mechanical Engineers", eighth edition, New York, McGraw-Hill Book Company, 1978, pp. 1-38.

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