Splice for use during the thermal stabilization of a flat multif

Details Splice for use during the thermal stabilization of a flat multif Splice for use during the thermal stabilization of a flat multif

1976-11-17

1978-03-07

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

81155, 156158, 156289, 156329, 156163, 156502, 260 465G, 264258, 428 57, 428447, B31F 500

Patent

active

040778223

ABSTRACT:
An improved flexible splice is provided which is useful in joining segments of a substantially flat band (e.g., a flat tow) of an acrylic fibrous material in an end to end relationship. Such acrylic fibrous material subsequent to splicing, is passed through a heated thermal stabilization zone and thereby undergoes an exothermic cyclization reaction of pendant nitrile groups present therein. More specifically a silicone rubber adhesive is applied to the surfaces of the ends of each band segment and thereafter bonded preferably under elevated temperatures and pressure to form a splice through which the exothermic heat of reaction is effectively dissipated to an extent sufficient to avoid a deleterious effect on the original fibrous configuration which might otherwise result in the absence of such dissipation. The resulting splice is substantially flat in configuration and the band may be continuously passed in the direction of its length through the thermal stabilization zone without impairment of movement resulting from the presence of the splice.

REFERENCES:
patent: 2799915 (1957-07-01), Barnett et al.
patent: 3125477 (1964-03-01), Laliberte
patent: 3134703 (1964-05-01), Listner
patent: 3240731 (1966-03-01), Nitzsche et al.
patent: 3355480 (1967-11-01), Di Paola
patent: 3539295 (1970-11-01), Ram
patent: 3619314 (1971-11-01), Ecureux
patent: 3671192 (1972-06-01), Ezekiel
patent: 3701753 (1972-10-01), Shaw
patent: 3705120 (1972-12-01), Kawaguchi

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