GB447885A - Improvements relating to conditioning artificial textile and other materials - Google Patents

Abstract

In the manufacture or treatment of artificial fibres, filaments, yarns, films or foils or the like, a conditioning composition comprising egg oil is incorporated in or applied to the material. In the case of materials having a basis of an organic derivative of cellulose, the egg oil is preferably applied with a relatively non-volatile substance having a solvent or latent solvent action on the cellulose derivative; the conditioning agent may also contain a polyhydric alcohol and a hygroscopic substance. The egg oil may be prepared by subjecting yokes of hard-boiled eggs to pressure or to the action of solvents, or by drying the yokes of fresh eggs until most of the water is removed and then expressing the oil from the residual mass between hot plates; the oil so obtained is distilled and/or filtered, e.g. in solution, through activated charcoal, bone char or fuller's earth. The oil from hens' eggs, obtained by extraction with ether, is preferable; ducks' egg oil may also be used. The egg oil may be employed alone or in solution, e.g. in xylene or toluene, or as an emulsion, and may be used together with other substances, e.g. sodium or potassium soaps, oleic acid and other oils; fugitive tints may also be used. The conditioning agent may be applied to the finished materials, or it may be incorporated in the spinning solution. The conditioning agent may be applied by wicks, rollers, discs or the like as described in Specifications 390,861, 391,443, 392,904, 398,191; or 404,171, [Group VIII], or the agent may be forced through a yarn package. In examples: (1) A solution of cellulose acetate in acetone is spun by the dry spinning method; as the yarn leaves the spinning cell it is passed over a wick dipping in a bath of egg oil adjusted so that the yarn takes up 1--2 per cent of its weight of egg oil; (2) A yarn is spun from a solution containing 25 parts of cellulose acetate, 75 parts of acetone, and 1--1\ba1/2\be parts of egg oil; (3) A conditioning-agent for application to yarn comprises 60--70 parts by weight of the formal of the monomethyl ether of ethylene glycol, 30--40 parts of egg-oil, and 6--12 parts of a 70 per cent aqueous solution of diethylene glycol.ALSO:Artificial fibres, yarns, or the like are lubricated and conditioned by applying or incorporating egg oil, alone or mixed with a polyhydric alcohol, a hygroscopic substance, and a relatively non-volatile solvent or latent solvent for cellulose derivatives. Suitable hygroscopic substances are glycerine, glycol, diethylene glycol, propylene glycol, and the mono-ethyl or other ether of glycol or other polyhydric alcohol. Suitable solvents are benzyl alcohol, diacetone alcohol, ethyl a hydroxyisobutyrate, and the bodies obtained by condensing formaldehyde or other aldehyde with glycerine, glycol, or other polyhydric alcohol or ethers thereof, e.g. monomethyl ether of glycol. The egg oil may be prepared by subjecting yokes of hard-boiled eggs to pressure or to the action of solvents, or by drying the yokes of fresh eggs until most of the water is removed p and then expressing the oil from the residual mass between hot plates; the oil so obtained is distilled and/or filtered, e.g. in solution, through activated charcoal, bone char or fuller's earth. The oil from hens' eggs, obtained by extraction with ether is preferable; ducks' egg oil may also be used. The egg oil may be employed in solution in xylene or toluene; as an emulsion, e.g. with oleic acid and water; or together with other substances, e.g. sodium or potassium soaps, oleic acid, other oils and fugitive tints. In an example, a mixture of 60--70 lb. of the formal of the monomethyl ether of glycol, 30--40 lb. of egg-oil, and 6--12 lb. of a 70 per cent aqueous solution of diethylene glycol is used.