| 摘要 |
1,016,128. Stretching synthetic filaments. GUISEPPE AZIMONTI & FIGLI S.r.L. March 12, 1964 [Oct. 9, 1963], No. 10560/64. Heading B5B. The stretchability of synthetic polymer filaments, particularly polyethylene terephthalate, filaments, which are still in the amorphous condition are first contacted with water containing in solution or as an emulsion one or more compounds of the group: ethers and esters of polyhydric alcohols, partial oxidation products of aliphatic or aromatic hydrocarbons, or sulphonic derivatives of such products, organic amines such as cyclohexyldiethanolamine, triethanolamine, monoethanolamino - phenylamine, trihydroxymethylamine, sulphated fatty oils such as Turkey red oil and thiosulphates. The filaments are thereafter contacted with a substantially water-free mixture in liquid form of two or more lubricating substances comprised by refined mineral oils, unsaturated higher fatty alcohols, phosphoric esters of higher fatty alcohols, esters of higher fatty acids with lower fatty alcohols, esters of higher fatty acids with polyhydric alcohols, and fatty acid-ethylene oxide condensation products. The mixture of lubricating substance may be dissolved in a fairly volatile organic solvent such as a petroleum distillate having a boiling range of 150‹ to 170‹ C. The filaments may be contacted with the aqueous bath and the non-aqueous bath by passing them over two rotating carborundum rollers dipping respectively into the two baths. The stretch ratio used in the stretching step may be about 5À5 and the stretching may be effected using a snubbing pin maintained at 160‹ C.
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