Sized multifilament yarn of an aromatic polyamide, a yarn packag

Details Sized multifilament yarn of an aromatic polyamide, a yarn packag Sized multifilament yarn of an aromatic polyamide, a yarn packag

1981-11-20

1984-06-19

Kendell, Lorraine T.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including interlaminar mechanical fastener

57250, 139420A, 428395, B32B 2734, D02G 300, D03D 1500

Patent

active

044553412

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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patent: 4320823 (1982-03-01), Covaleski
patent: 4368615 (1983-01-01), Lammers

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