[usual textile manual] knitted fabric

Raw material knitted fabrics are suitable for spinning various raw materials. Knit yarn yarns generally have a slightly smaller twist than woven fabric yarns. The linear density of the yarn varies with the thickness of the knitted fabric and the "machine number" of the knitting machine. Usually, the thin knitted fabrics are made of low linear density yarns and woven on a sizing machine. The thick knitted fabrics are made of high linear density yarns and are knitted on a low gauge knitting machine. In a knitted fabric, a row in which the coils are connected to each other in the transverse direction is referred to as a coil course, and a straight line formed by connecting the strings end to end in the longitudinal direction is referred to as a coil wale. The coil consists of a curved section and a straight section. The curve section is called circle arc (needle knitting and settlement arc) and the straight section is called circle column (the linear section and the extension line in the warp-knitted fabric are on the opposite side of the fabric).

Classification According to the different production methods and knitting processes, knitted fabrics can be divided into two categories: weft knitted fabrics and warp knitted fabrics. A yarn of a weft knitted fabric weaves a course stitch, and a yarn of the warp knitted fabric forms only one or two stitches in a course, so a course of the warp knitted fabric is knitted by a plurality of yarns Made. Weft knitted fabrics are more elastic and extensible than warp knitted fabrics, and warp knitted fabrics have better dimensional stability than weft knitted fabrics. According to the number of needle beds used for knitting, knitted fabrics can be classified into "single knit fabrics" and "double knit fabrics". Single knit fabrics are knitted on a needle bed and double knit fabrics are laid on two needle beds. Weaving.

Knitted tissue Knitted tissue is divided into basic tissue, altered tissue, and colored tissue according to the structure of the coils and their arrangement with each other. The basic organization is the basis of all knitted fabrics, and the coils are combined in the simplest manner, such as weft knitting, ribbing, double reversed, warp knitting, warping, and satin. A change organization is a combination of vertical rows of one or more basic structures arranged between the vertical rows of one basic organization, such as weft-changing flats, double ribs, warp-knitted warp and meridians. Organizations, etc. The color pattern organization is based on basic organization and change organization. It is made by changing the coil structure or weaving auxiliary yarns or other textile materials, such as jacquard, collection, leno, pad, terry, plating, and corrugation. , Lining weft insertion, plush and other organizations and the combination of basic organization, change organization and flower color organization, etc., these organizations have significant color effects and different physical and mechanical properties.

Uses Knitwear is used for a wide range of applications, including underwear, tights, sportswear, and outerwear. Knitted fabrics can be woven into grey fabrics , cut and sewn into various knitwear, and can also be woven directly into fully formed or partially formed products such as socks and gloves. Can also be widely used in the production of hats, bed sheets, bedspreads, tablecloths, curtains, mosquito nets, carpets and lace and other life, decorative supplies, can also be used to produce industrial dust filter, high pressure oil and gas transmission pipe, rubber and plastic industrial lining Pads "", oil booms for oil ports, packaging bags, fishing nets, safety nets for construction, low-pressure hoses for irrigation purposes, nets for crop cultivation, nets for protective bank slopes, fishing nets, artificial blood bamboos, heart valves, bandages , wrist guards, knee pads and other industrial and agricultural and medical supplies.

Physical mechanical properties 1 Dispersibility. In a knitted fabric, the breakage of a thread causes the thread and thread to detach from each other and lose the performance of the string. The larger the coefficient of friction and bending stiffness of the yarn, the shorter the length of the loop, the smaller the disengageability of the knitted fabric. 2 curling. In the free state, the wraparound performance of the edge of the knitted fabric occurs. This is due to the bending of the bent yarns in the edge coils. In general, the thicker the yarn, the better the elasticity, the shorter the length of the coil, and the more pronounced the curling property. In the double-knit fabric, the internal stress of the front and back threads at the edge is roughly balanced, so basically no curling is performed. . 3 Extensibility. The properties of stretched knitted fabrics under external force. Since the coil can change shape and size, the knitted fabric has greater extensibility, and changing the structure of the fabric can reduce its extensibility. 4 elasticity. The ability of the knitted fabric to return to its original size after removal of the external force. It depends on yarn properties, coil length and fabric organization. 5 strong. The force that a knitted fabric can withstand when it breaks. 6 hooking and pilling. When a knitted fabric meets a rough object, it will be pulled out of fibers and yarns, and a part of the stitches will be tightened to form a silk ring on the surface of the fabric, which is called hook thread. The fabric is constantly subjected to friction during wear and washing. The end of the yarn in the yarn is pulled out of the surface of the fabric and forms a fur, called fluff. In later wear, if the furry entangles with each other and kneads into pellets, it is called pilling. In addition to the conditions of use, the factors affecting the hooking and pilling are mainly raw material types, yarn structures, knit fabrics, and dyeing and finishing processes. 7 shrinkage. The percentage of change in length or width of the knitted fabric during processing or use. Frequently divided under the machine shrinkage, dye shrinkage, water shrinkage and relaxation shrinkage rate.