1. Dyeing of Stockings of Spandex/nylon Core Yarns with Disperse Dyes in Supercritical CO2 Fluid

    Li Zhenhua, Zheng Guanghong, Wu Kun, Ren Jianhua, Zheng Xiong, Bo Yan, Li Guoli, Huang Jun

    Chengdu Textile College, Chengdu, China; postcode: 611731

    Abstract: In the paper the dyeing of stockings made from spandex/nylon core yarns in supercritical carbon dioxide fluid (SCF) with disperse dyes that are affinitive to both components of the yarns is discussed. Dyeing result shows SCF functions well as a detergent in the stockings’ pretreatment including oil cleaning and inner-stress relief. As a medium, SCF can dissolve the dye and levelly add color onto the stockings at a relatively high yield with a given color fastness under a proper control of dyeing temperature, pressure and time. Color yield and fastness are subject to the dye applied. Color fastness can also be improved by removing unfixed dye from the stockings with SCF. The SCF dyeing method, which is water-free and environmental-friendly, is applicable and presents a good prospect in the dyeing of stockings made from spandex/nylon core yarns.

    Keywords: spandex/nylon stockings, dyeing, supercritical CO2 fluid, disperse dye, dyeing conditions and quality

    Pages: 1 – 10 | Full PDF Paper
  2. Differences of Latest Versions of ISO 6892-1 and ASTM E8 Tensile Testing Standards

    Haldun DİZDAR, Bülent AYDEMİR and Cemal VATAN

    TÜBİTAK National Metrology Institute (TÜBİTAK UME), 41470, Gebze-Kocaeli, Turkey

    Abstract: This paper contains some information for differences of latest versions of metallic materials tensile testing standards ISO 6892-1:2016 and ASTM E8:2016. In this context, it is aimed to increase the awareness by presenting current differences between two international standards to those who use tension testing of metallic materials in their work areas.

    Keywords: ISO 6892-1, ASTM E8, tensile testing, metallic materials, international standards

    Pages: 11 – 22 | Full PDF Paper