Polyamide continuous yarns

Various 66 polyamide continuous yarns were also examined (referred to as, "type 2", "type 4" and "type 5") these are experimental yarns prepared in different conditions and supplied by RPT. 

Polyamide fibres can be dyed with both cold- and hot-dyeing reactive colours in a liquor containing 4 per cent of the weight of the goods of acetic acid 80 per cent. The load is entered at 40°C (104°F) and the temperature brought up to 95°C (203°F), after which dyeing is continued for 1 hour, or more, if necessary. The reaetive dyes are satisfactory on staple yarns where differences in the affinity of the polyamide fibre are randomized. In continuous filaments any irregularities in the yarn are not covered. 

The main uses for both nylon 6,6 and nylon-6 are in apparel, carpets, and industrial applications. In the area of general apparel, polyester has gained considerably in significant market segments at the expense of polyamides because of its easy-care characteristics. Polyamide textile fibers, however, will expectedly continue to be the principal materials for women s hosiery, intimate apparel, and certain stretch fabrics. It seems safe to conclude that the price to performance ratio will continue to secure a firm market position for polyamide fibers, even at increased feedstock prices. Primarily tire yarns in the developing countries will drive polyamide industrial fibers. 

In this patented process from the Korea Research Institute of Chemical Technology, continuous slivers or twisted yarns of different polymers, but especially of polyamide-polyimide copolymers, are claimed to be obtained by electrospinning first onto one stationary or rotating plate or conductive mesh collector, where the charges on the fibers are neutralized, and then continuously collecting the fibers from the first onto a second rotating collector. 

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