Mainly talk about the more yarn used in the home textile field-fancy yarn
Refers to a single strand yarn with structural and morphological changes. Its spinning method uses special techniques or devices in the processes of carding, roving and spinning to change the structure and shape of the yarn, so that the surface of the yarn has "dot" and "knot" patterns. For example, the surface of the knotted yarn shows granular dots attached to the surface of the yarn; the surface of the slub yarn shows intermittent thick details; the surface of the intermittent AB yarn is a single-color yarn, and the other is a two-color AB yarn alternately distributed. The length of this coarse detail or single color and AB yarn can be determined according to the requirements of the subsequent product. It can be long or short, thick or thin, and the spacing can also be thin or dense, regular and irregular.
01. Spandex core spun yarn
Spandex core-spun yarn is a stretched spandex filament (generally stretched 3~4 times) is fed between the middle roller and the front roller of the ordinary spinning frame to merge with the drafted strand, and the front roller makes The original ribbon-shaped fiber must be wrapped around the spandex yarn. The linear density of this type of yarn is generally 12-30 tex (33-83 public count), which can be used for knitted fabrics or woven fabrics, the fabric is elastic and comfortable to wear. At present, most of the spandex core-spun yarns are cotton-wrapped ammonia, but also polyester-wrapped. Spandex core-spun yarn can also be produced on a double-roller twisting machine or a special covering machine. The outer covering of the spandex yarn is coated with a layer of cotton yarn or nylon filament; some silk is also used to make the collar of silk T-shirt The shrinkage of spandex yarn makes the knitted collar stiff.
02. Polyester core spun yarn
The polyester core-spun yarn is formed by feeding a high-strength polyester filament between the middle roller and the front roller on an ordinary spinning frame, and the original ribbon-shaped fiber is wrapped on the surface of the polyester filament through the front roller. The yarn can be made into a high-strength polyester sewing thread after being twisted. It has high strength and is not easy to generate heat when it passes through the needle hole of a high-speed sewing machine after being covered with a layer of cotton fiber. This kind of yarn can also be woven into canvas as a conveyor belt. It not only has high strength, but also has good adhesion to rubber after being coated with cotton fiber, which overcomes the shortcomings of poor affinity between polyester and rubber. Polyester cotton core-spun yarn can be used as polyester cotton burnt-out fabric.
03. Stainless steel wire core spun yarn
Stainless steel wire core-spun yarn is a stainless steel monofilament with a diameter of 25um covered with cotton fiber. The spinning method is similar to that of polyester core-spun yarn. In the process, it is necessary to pay attention to the unwinding of stainless steel wire package using radial positive unwinding. When weaving with this kind of core yarn, it is generally used as weft yarn, arranged in 1:1 or 1:2 with ordinary yarn. This kind of fabric can be used as a cover for anti-radar in national defense, and can also be used in civil radiation-proof overalls or aprons, etc., and has a wide range of uses.
This kind of yarn is made by drawing stainless steel wire into 8000~1000 tow (monofilament diameter 6-8μm), which is broken into fibers by drawing frame, and then blended with cotton into yarn. The fabric using this kind of yarn in the warp and weft directions has very good radiation resistance and shielding effects, and can be used for national defense and civil use. If the cotton fiber is burned with a fire, it will be a thin stainless steel net.
Slub yarn is an additional device on the ordinary spinning frame to make the front roller change speed or stop, thereby changing the normal draft ratio, and a thick knot is suddenly produced on the normal yarn, which is called slub yarn like a slub. In the same way, the middle and rear rollers can also be over fed suddenly, and the drafting ratio can be changed to form bamboo joints. At present, the linear density of commonly used slub yarn is 12-83ex (12-83 male count). The raw materials are pure cotton, chemical fiber blends, etc., mainly short fibers, but also medium-length and wool-type fibers. The length of the slub is generally not less than the length of the fiber. The length of the slub of cotton fiber is shorter than that of the thousand-type fiber. The thickness of the slub depends on the variety. The smallest slub is about 1 times thicker than the base yarn. This slub yarn is combined with a normal yarn of the same number to make a garment fabric, and the surface of the fabric can appear irregular. Pattern. The slub yarn whose slub is more than 4 to 5 times thicker than the base yarn is often covered with a thinner yarn or filament when used, because the thickness of the slub and the base yarn is too different, and the twist at the slub is very high. Small, so that this yarn is not only prone to hairy, but also has low strength. This shortcoming can be overcome by wrapping a yarn. The fabric woven with this kind of yarn has a rough surface and unique style; this kind of yarn is also used to make wave yarn on a fancy twisting machine. Because the wave shape at the thick section is very large, it looks like corn, so it is also called popcorn yarn.