Circular knitting

Selvedge glues, based on a non-thermoplastic resin dissolved in a non-flammable solvent to be applied on slitting machines for circular knits or at the stenter avoids curling of selvedges... 

The singeing machine for circular knit fabric differs from the well-known singeing machine for woven fabrics only in guiding and transport of the fabric. The real problem consists in properly opening out the tubular fabric. The distance between burner and fabric must be exactly the same at every point. The burner must be so designed that there is an uniform flame intensity over the entire tube circumfer-... 

The traditional machines used for mercerizing woven fabrics are inadequate to treat circular knit fabrics. Owing to knit structure, such fabrics are easily deformed, distorted and extended on stretching during mercerization and washing. These dis-... 

C (302°F and 428°F) according to the nature of the yarn, the stmcture of the fabric, and the type of finish required. The temperature of setting can have an effect on affinity for dyes and it is therefore important that conditions should be kept uniform. Circular knitted web can be set on the Hot Bowl Calender (Chapter 21) or the piece may be rolled over a stretcher to the specified width and set in an autoclave (Fig. 23.4). 

Actually, elastomeric knitted fabrics account for the highest proportion of commercial sportswear. The knitting technology involves warp knitting and circular knitting. The former relates to tricot, raschel, and double-needle-bar raschel the latter involves single knit, interlock, double knit, and rib knits. 

Textile Learner, 2012. Interlock circular knitting machine/Knitting action of interlock circular knitting machine, http //textileleamer.blogspot.hk/2012/01/interlock-circular-knitting-machine.html. 

In parallel with these developments in circular knitting, there was a steady development of competitive technology such as integral complete garment manufacture on flat knitting machines. 

The majority of acrylic fiber production is 3 5 denier staple and tow, furnished undyed in either bright or semidull luster. The major markets are in the apparel and home furnishings sectors. Within the apparel section, these fibers find extensive use in sweaters, and in singleknit jersey, double-knit, and warp-knit fabrics for a variety of knitted outerwear garments such as dresses, suits, and children s wear. Large markets for acrylics in the knit goods area are hand-knitting yarns, deep-pile fabrics, circular knit, fleece fabrics, half-hose, coarse-cut knitwear, and deep-pile fabrics for blankets. 

A breakdown of U.S. domestic synthetic staple and tow fiber shipments by end use is given in Table 12.33. Organized by fiber type and application, these data show that acrylic fiber is strongest in hosiery, sweaters, craft yarns, pile fabrics, circular knits, flat knits, and blankets. Polyester, valued for its low cost and easy-care properties, has a strong hold on the fiberfil, nonwoven, flat-knit and broad-woven fabric markets. Nylon, valued for its durability and resiliency, dominates the carpet market. Olefin, a fiber type that appears to be growing in popularity, has great impact on the nonwovens market and has made inroads in the carpet face yarn markets versus nylon staple and filament. Table 12.34 shows the same type of data as Table 12.32, but arranged by distribution of end use for each type of synthetic staple and tow fiber. 

Acetate fibres are used mainly for the production of cigarette filters with a global production volume of filter tow of 740 000 tonnes in 2009, which is an increase of 170 000 tonnes since the year 2000 [52]. Textile acetate yarns experienced a 30% decline to 42 000 tonnes in 2009 [52]. Main applications for the later are women s linings, woven fashion, woven satins, circular knits, men s linings, tricot knits, woven velvets, home furnishings, coffin linings, medical and ribbons [43]. 

As the name implies, yarns run horizontally across the width of the fabric. The knitting needles form the loops in horizontal courses, with one loop built on top of the other, and are generally made from a single yarn. Weft knits can be made flat on a flat bed machine, or tubular on a circular knitting machine. Weft knits are basic loop structures and can be stretched in both directions (Figure 21.16). 

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