Improvements in or relating to yarns or textiles made from such yarns which are manufactured of rabbit's hair

摘要

Rabbits' hair having reduced tendency to become electrified by friction when incorporated in yarns and textiles is prepared by treating the hairs with aldehydes or formic acid at a pH between 1 and 7 at from room temperature up to 100 DEG C. or in vapour form. Any excess of aldehyde or acid is removed by ammonia or by aeration. The process is particularly applicable to the treatment of Angora rabbit hair. At room temperatures, the process may occupy some days or even weeks, but at temperatures from 30 DEG to 100 DEG C. it may be carried out in a few hours. According to examples, Angora rabbit hair is treated with about 10 per cent of 40 per cent formaldehyde in the presence of sulphuric, phosphoric, hydrochloric, formic, acetic, or chloracetic acids, or it may be treated by formic acid alone. Specifications 243,301, [Class 15 (ii)], and 583,005 are referred to. The Specification as open to inspection under Sect. 91 comprises also the treatment of rabbits' hair with mordants such as soluble salts of magnesium, calcium, zinc, boron, aluminium, tin, and chromium, and the anhydrides of organic acids such as vapours of phthalic acid anhydride, with or without volatile organic bases such as pyridine. Also halogenated organic acids such as trichloracetic acid, or sulphonated substances such as Turkey red oil or naphthalene sulphonic acids, or bromine or chlorine may be used. The prepared hairs may be carded, pressed, stretched or curled, e.g. by pressing against a perforated plate or passing between undulated plates with openings for the admission of treating liquid or vapour. In further examples, rabbit hair is soaked in magnesium acetate solution with or without an aldehyde, in aluminium sulphate solution with or without aldehydes, and in boric acid solution in the presence of sulphuric acid. This subject-matter does not appear in the Specification as accepted.