Process for producing rubber-reinforcing aromatic polyamide mult

Details Process for producing rubber-reinforcing aromatic polyamide mult Process for producing rubber-reinforcing aromatic polyamide mult

1992-08-27

1993-09-21

Lusigan, Michael

Coating processes

With stretching or tensioning

Running lengths

4273855, 427386, 428383, 428395, B05D 510, B05D 310

Patent

active

052467350

ABSTRACT:
An aromatic polyamide multifilament yarn having a high bonding property to a rubber material and a high resistance to fraying of individual filaments, is produced by impregnating an aromatic polyamide multifilament yarn with a treating liquid comprising a first liquid rubber component (A) comprising at least one rubber compound provided with terminal hydroxyl or epoxy groups and having a molecular weight of 500 to 10,000, a second liquid rubber component (B) comprising at least one rubber compound provided with terminal isocyanate groups and having a molecular weight of 500 to 10,000, and an additive selected from antioxidants, antiaging agents, and epoxy compounds; heat treating the impregnated multifilament yarn at 100.degree. to 260.degree. C. for 30 to 260 seconds; twisting the heat treated multifilament yarn at a twist coefficient K satisfying the relationship (I):

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Derwent Publications Ltd., London, GB; Mar. 1988, AN 122766 & JP-A-63 066 382 (Bridgestone Tire K.K.) * Abstract* & US-A-5,151,142, Imai, et al. ), Sep. 29, 1992.
Derwent Publications Ltd., London, GB; Jul. 1987 AN245394 & JP-A-62 166 101 (Bridgestone Tire K.K.) *Abstracts* & US-A-5 151 142 (Imai, et al.), Sep. 29, 1992.
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