Characteristics of polyester thread
Polyester fiber is a kind of high-quality synthetic fiber. For nylon threads, it ranks second, and does not lose strength when wet. Its shrinkage rate is very small, and the shrinkage is less than 1% after proper shaping, so the sewing stitches can always remain flat and beautiful without shrinkage. Abrasion resistance is second only to nylon. Low moisture regain, good high temperature resistance, low temperature resistance, light resistance and water resistance. Therefore, polyester thread is an extremely widely used variety, replacing cotton sewing thread in many occasions. Polyester thread has a wide range of uses, and can be used for garment sewing of cotton fabrics, chemical fiber fabrics and blended fabrics, as well as for sewing knitted outerwear. The special polyester thread is also an excellent thread for the shoe and hat leather industry.
What are the specifications of polyester thread
There are 20S/2, 20S/3, 40S/2, 40S/3, 50S in polyester thread /2, 60S/2 and other specifications.
S stands for yarn count, all of which are used here in imperial counts, which means that the length of the yarn per unit weight (1 pound) at the specified moisture regain is a multiple of 840 yards. A few 840 yards are the imperial yarns. (often represented by Ne). Unit: s. (1 pound = 0.4536 kilograms, 1 yard = 0.9144 meters) Take 20S as an example, that is, the length of the yarn of this specification of 0.4536 kilograms is 20*(0.9144*840) meters long. So, the larger the count, the longer the length of a pound of yarn, and the finer the yarn.
/2 and /3 refer to the number of strands, and 20S/2 refers to a double-ply yarn composed of double-ply 20S single-yarn. /3 is three strands of yarn.
Polyester yarn and Nylon yarnDifference
Polyester, polyester fiber, also known as POLYESTER, characterized by good breathability and moisture removal. It also has strong anti-acid and alkali resistance and anti-ultraviolet ability.
Nylon, nylon, also known as Nylon, polyamide fiber. The advantages are high strength, high wear resistance, high chemical resistance and good resistance to deformation and aging. The disadvantage is that it feels hard.
1. Gloss
Polyester imitation silk has a strong feel, bright luster, but not soft enough, with a sparkling effect, smooth, flat and elastic it is good. After pinching the silk surface with your hand, release it without obvious crease. After the warp and weft are soaked in water, it is not easy to break.
The luster of nylon is dull, the surface feels like a layer of wax has been applied, and the color is not bright. The hand feels stiff, and the hand squeezes the fabric and releases it, there are creases, and it can slowly return to its original state. Warp and weft fastness.
2. Performance
The performance of polyester: high strength. The strength of short fiber is 2.6-5.7cN/dtex, and the strength of high-strength fiber is 5.6-8.0cN/dtex. Due to its low hygroscopicity, its wet strength is basically the same as its dry strength. The impact strength is 4 times higher than that of nylon and 20 times higher than that of viscose fiber. Good elasticity. The elasticity is close to that of wool, and it can almost fully recover when the elongation is 5% to 6%. The wrinkle resistance exceeds other fibers, that is, the fabric does not wrinkle and has good dimensional stability. The elastic modulus is 22~141cN/dtex, which is 2~3 times higher than that of nylon. Good water absorption. Grinding is good. Abrasion resistance is second only to nylon with the best abrasion resistance, better than other natural fibers and synthetic fibers, and light resistance is second only to acrylic. preservative. Resistant to bleaches, oxidants, hydrocarbons, ketones, petroleum products and inorganic acids. Dilute alkali resistance, not afraid of mildew, but hot alkali can make it decompose. Poor staining.
The performance of nylon: strength, good abrasion resistance, ranking first among all fibers. Its abrasion resistance is 10 times that of cotton fibers, 10 times that of dry viscose fibers, and 140 times that of wet fibers. Therefore, its durability is excellent. Nylon fabric has excellent elasticity and elastic recovery, but it is easy to deform under small external force, so its fabric is easy to wrinkle during wearing. Poor ventilation and ventilation, easy to generate static electricity.
3. Hygroscopicity
Polyester fabrics have poor hygroscopicity, feel stuffy when wearing, and are prone to static electricity and dust, which affects beauty and comfort sex. However, it is very easy to dry after washing, and the wet strength hardly decreases, and it does not deform. It has good wash and wear performance.
The hygroscopicity of nylon fabrics is better among synthetic fiber fabrics, so the garments made of nylon are more comfortable to wear than polyester garments. It has good moth resistance and corrosion resistance. The heat and light resistance are not good enough, and the ironing temperature should be controlled below 140 ℃. In the process of wearing and using, you must pay attention to the conditions of washing and maintenance, so as not to damage the fabric. Nylon fabric is a light-weight fabric, which is only listed after polypropylene and acrylic fabrics in synthetic fiber fabrics. Therefore, it is suitable for making mountaineering clothes, winter clothes, etc.
4. Heat resistance
Polyester has the best heat resistance among synthetic fabrics. The melting point is 260℃, and the ironing temperature can be 180°C. Thermoplastic, it can be made into pleated skirts with long-lasting pleats. At the same time, polyester fabric has poor melting resistance, and it is easy to form holes when encountering soot, sparks, etc. Therefore, try to avoid contact with cigarette butts, sparks, etc. when wearing. The light fastness of polyester fabric is better than that of acrylic fiber, and its light fastness is better than that of natural fiber fabric. Especially the light fastness behind the glass is very good, almost on par with acrylic. Polyester fabrics have good resistance to various chemicals. Acids and alkalis are not very damaging to them, and they are not afraid of molds and insects. Polyester fabrics have good wrinkle resistance and shape retention, so they are suitable for outerwear.
