Preparation and properties of looped viscose-kapron yarns

Conclusions The method of yarn texturizing with an air stream is universal: it permits one to obtain looped yarns both from natural fibers, and also from thermoplastic or nonthermoplastic man-made yarns. The main advantages of this method are the possibility of processing yarns over a broad range in linear density, a high texturizing speed, and maintenance of the physicomechanical properties of the original yarns.Using aerodynamic texturization, one can produce combined yarns which have such specific properties as incombustibility, electrical conductivity, antistatic behavior, etc.The use of yarns which have been texturized by the aerodynamic method will make it possible to enlarge the assortment of articles produced by the textile and jersey industry.Translated from Khimicheskie Volokna, No. 1, pp. 25–28, January–February, 1985.     

Air-cooled barrier-discharge excilamps

Air-cooled barrier-discharge excilamps with flat exit windows are described. The results of investigations into radiation of lamps on KrCl* (λ ～ 222 nm), Cl₂(λ ～ 258 nm), and KrBr (λ ～ 207 nm) molecules are given. The obtained average radiation powers in the UV spectrum region behind a flat window are 10.2, 1.55, and 4.15 W, respectively. The excilamps are intended to uniformly irradiate various objects with areas of up to 200 cm² in air and various gaseous media. They are also equipped with a system preventing the ozone generated in the lamp from leaving.     

Technological principles in texturizing polycaproamide yarns

Conclusions Texturization of yarns by the press-chamber method leads to the formation of twists of the flat zig-zag type on smooth yarns. Because of the receipt of crimp, a yarn is obtained with an increased bulk and improved heat-insulating, and hygienic properties.After texturizing, appreciable changes take place in the structure and morphology of elementary filaments. The latter causes a change in the complex of physicomechanical yarn properties.By the use of basic technological texturizing parameters, it is possible to vary the characteristics of the basic specific properties of crimped yarns.Translated from Khimicheskie Volokna, No. 2, pp. 27–34, March–April, 1985.