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

1975-12-15

1977-09-13

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

28143, 28164, 57142, 57159, 112406, 112412, 156 93, 156157, 264 292, 264103, 264182, 264206, 264236, 264347, D06M 336

Patent

active

040482774

ABSTRACT:
An improved 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. A fabric surrounds and is sewn to an end of each band segment and extends beyond the end of the band to form a fabric extension. A pair of fabric extensions are sewn in an overlapping opposing relationship in the absence of any substantial overlap of the acrylic fibrous material of each band segment within the splice. 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. The usual exothermic heat of reaction which is evolved during the cyclization portion of the thermal stabilization reaction effectively is dissipated from within the splice without harm. BACKGROUND OF THE INVENTION It is well known that acrylic fibrous materials when subjected to heat undergo a thermal stabilization reaction wherein the fibrous material is transformed to a black form which is non-burning when subjected to an ordinary match flame.

REFERENCES:
patent: 1774858 (1930-09-01), Vorbau
patent: 3155062 (1964-11-01), Westmijze et al.
patent: 3206344 (1965-09-01), Elkins, Jr.
patent: 3349738 (1967-10-01), Kish, Jr.
patent: 3539295 (1970-11-01), Ram
patent: 3546330 (1970-12-01), Thompson
patent: 3754957 (1973-08-01), Druin et al.

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