| 摘要 |
965,322. Wet-spun filaments. AMERICAN CYANAMID CO. Aug. 16, 1962 [Dec. 18, 1961; June 19, 1962], No. 31455/62. Heading B5B. Wet spun filaments are treated with a lubricant while in the wet uncollapsed state, dehydrated to produce a collapsed polymer structure, and an anti-static agent applied to the collapsed structure. Preferably, the moisture content of the wet uncollapsed polymer structure is reduced to 50-25% water by weight, suitably by contact with a heated moving surface at 100-550‹ F., before application of the lubricant. The wet uncollapsed structure with the lubricant thereon may be dehydrated by contact with a heated moving surface, suitably at 100- 550‹ F. Apparatus as shown in Fig. 1 comprises a lubricator 24, heated thread-advancing rolls 25, and an applicator 26 for the antistatic agent. Apparatus as shown in Fig. 2 comprises a lubricator 116, heated thread-advancing rolls 114, and an applicator 120 for the antistatic agent. The process is particularly suitable for the treatment of acrynonitrile homopolymers and copolymers (long list given). Spinning solutions may be made in dimethyl formamide, dimethyl acetamide, ethylene carbonate, dimethyl sulphoxide, or in concentrated aqueous solutions of sodium thiocyanate or zinc chloride, and wet-spun into cold dilute aqueous sodium thiocyanate solution to form filaments which are washed and elongated in heated aqueous baths to produce the uncollapsed wet gel structure to be treated. Specified lubricants include ethylene oxide condensates of reactive animal and vegetable oils, e.g. castor oil, blown and unblown neat's foot oil, sperm oil, olive oil, castor oil, teaseed oil, peanut oil, soya bean oil and cotton seed oil, and sulphonated olive oil, Specified anti-static agents include aqueous dispersions, or dispersions in other media, of stearamidopropyl-#-hydroxyethyl dimethyl ammonium dihydrogen phosphate, phenyl guanidine stearate, guanylurea octodecyl hydrogen sulphate, guanidine octadecyl hydrogen sulphate, guanidine oleyl hydrogen sulphate, octadecoxy propionitrile, and reaction products of ethylene oxide and a long chain alkyl guanamine or guanidine, e.g. octadecyl guanamine, or octadecyl guanidine. Other conditioning agents may be used in conjunction with the anti-static agent, for example wetting and dispersing agents, e.g. N-octadecyl disodium sulphosuccinamate, dioctyl sodium sulphosaccinate, lecithin, ethyl, propyl, butyl and amyl stearates, palmitates and oleates, and hydroxyethylated esters and amides of long-chain fatty acids. Specification 594,999 is referred to.
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