Elastic fiber has entered every aspect of people’s daily life and is an essential textile and clothing raw material in life!
Without it, there would be no stockings for women who love beauty; without it, there would be no colorful and diverse summers swimsuit; without it, there would be no tights that highlight the devil’s figure… It can be said that elastic fiber has made an indelible contribution to human beings showing their figures and enjoying the comfort of dressing!
Elastic fiber (mainly including spandex and polyester fiber processed by special technology) provides people with free space for movement, making the space between retraction and expansion unlimited.
Polyester high elastic yarn
Polyester high elastic yarn is a textured yarn One type is made by using the torsional false twisting method on the stretch deformation machine, stretching by the stretching roller and twisting by the self-false twister, and through hot box shaping and other processes. The crimp rate of textured yarn is generally 30% to 50%, so it has a certain degree of stretch and fluffiness. Its high shrinkage characteristics can be used to achieve various design requirements and appearance effects of the fabric.
Polyester high stretch yarn has high elasticity and stretch rate. It has the characteristics of good elasticity, full feel, strong pulling force and bright color. Compared with spandex fabric, it has permanent elasticity, strong light resistance, labor resistance and chemical resistance, long storage life, high color fastness, good dimensional stability, unique style and high cost performance.
Usage: Suitable for outdoor leisure, tights, trousers, women’s clothing, down jackets, Denim series, etc.
Spandex, spandex core-spun yarn
Spandex was first developed by Bayer Company of Germany and put into mass production by DuPont Company of the United States. Due to immature technology and insufficient market development, it has not been able to be mass-produced. It was not until the end of the 20th century that it was widely used in clothing fabrics. In the past 10 years, covered yarns, core-spun yarns, and twisted yarn fabrics of spandex and other fibers have developed greatly.
Spandex fiber has great elasticity and can generally be stretched to its original length. 4 to 7 times, and its recovery rate is almost 100% under 2 times stretching. When stretched to 500%, its resilience rate is 95 to 99%, which is beyond the reach of other fibers.
Spandex core-spun yarn
The outer fiber of spandex core-spun yarn can be natural fibers such as cotton, linen, silk, wool, etc., or acrylic fiber or other pure and blended chemical fibers. The core yarn spandex provides Excellent elasticity, the outer fiber provides different styles of surface properties.
Compared with other elastic yarns, spandex core-spun yarn has a significant feature that the core yarn is not exposed when the yarn is stretched tightly. Therefore, the dyeing effect is good and it is suitable for making products of various colors including dark colors.
PTT
PTT fiber is the abbreviation of polytrimethylene terephthalate fiber. It was successfully developed by the American Shell Chemical Company in 1995. It is produced with terephthalic acid and 1,3 propylene glycol as raw materials. High-quality polyester fiber, sold under the trade name Corterra.
In addition to its excellent softness and elastic recovery, PTT fiber also has excellent wrinkle resistance, dimensional stability, weather resistance, stain resistance, and easy dyeing. and good barrier properties.
SSY
SSY elastic fiber is a kind of PET side-by-side composite spinning fiber. It is a bi-component polyester fiber that uses the different shrinkage of the two components to form a permanent elastic crimp structure. Before processing, SSY fiber is almost as elastic as ordinary polyester yarn. However, after high-temperature dyeing and washing, permanent curling occurs, which makes the fabric elastic.
It has excellent elasticity and elastic recovery, unique feel and gloss, is stain-resistant and fluffy, is resistant to sunlight and chlorine, and has good moisture absorption and quick-drying properties. After being processed into fabric, the fabric surface will be smooth and smooth, with good drape, wrinkle-resistant and iron-free, dimensionally stable, moisture-absorbent and quick-drying, moderate elasticity, and comfortable to wear.
T400
T400 is a Composite elastic fiber with permanent spiral crimp and excellent bulk, elasticity, elastic recovery rate, color fastness and particularly soft hand feel.
High-resolution photos of T400 fibers show that the two polymers within each filament create a dog-bone-like cross-section.
It not only solves many problems such as traditional spandex yarn is not easy to dye, has excess elasticity, is complex in weaving, is unstable in fabric size, and is prone to aging during use, but it can also be used directly in air-jet, spray-on, etc. Weaving on water and arrow shaft looms does not have to be made into covered yarn before weaving on the machine like spandex, which reduces the cost of yarn and improves the quality uniformity of the product.
T400 has high tensile strength, and the elasticity of T400 filament is 2 to 5 times that of ordinary PET filament; it has good elastic recovery, even after 500 repeated stretchings , its elastic recovery rate can remain above 95%; it feels soft and comfortable to wear. T400 fiber is a hollow fiber with grooves, so it is not only more fluffy and softer than ordinary polyester, but also has better moisture absorption and perspiration functions. ;Good dyeing effect; smooth cloth surface and good wrinkle resistance.
PBT
PBTfiberistheabbreviationofpolybutyleneterephthalatefiber(Polybutyleneterephthalatefibre),whichismadeofhigh-purityterephthalicacid(PTA)ordimethylterephthalate.Itisalinearpolymermadebyesterificationandpolycondensationofester(DMT)and1,4-butanediol.Thefiberproducedbymeltspinningisatypeofpolyesterfiber.
Because PBT fiber has the characteristics of good elasticity, high dye uptake rate, and good color fastness , while maintaining the excellent properties of ordinary polyester (PET) such as stiffness and good dimensional stability. PBT fiber and its products have soft hand feel, fiber crimpability, excellent tensile elasticity and compression elasticity, and its elastic recovery rate is better than ordinary polyester. It has excellent dyeing properties and can be used for normal pressure boiling dyeing with ordinary disperse dyes. It has bright colors, excellent color fastness and chlorine resistance. Mainly used for core wrapping of other fibers and wool-like fabrics.
As can be seen from the above table, compared with ordinary polyester fiber (PET), PBT fiber has lower strength and breaks It has a large elongation and its initial modulus is significantly lower than ordinary polyester fiber, but it has outstanding elasticity and excellent dyeability, and its hand feel is softer than PET.
Clothings containing elastic fibers fit the human body shape, show beautiful natural curves, and increase beauty; they do not It brings comfort to the human body’s activities and caters to the human body’s requirements for comfort. Therefore, people are increasingly applying elastic fibers to various fabrics, such as swimwear, ski suits, casual sweatshirts, underwear, tights, stockings, etc.
Among the many functional varieties, elastic fiber, as a “sunrise industry”, can give the human body a good sense of contact and improve the wearing comfort of clothing. It plays an irreplaceable role in terms of fabrics, fluffiness and warmth, so it occupies a solid position in the textile industry in China and even the world. Giving textile fabrics a certain degree of elasticity has become an inevitable development trend in wearable textiles. </p
