What is SSY elastic fiber?
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.
SSY fiber has almost no elasticity like ordinary polyester yarn before processing. However, after high-temperature dyeing and washing, permanent curls will be produced. Make the fabric stretchy. It has excellent elastic elongation and elastic recovery rate, and this elasticity is stable and the recovery is good. Will not age as easily as spandex. It is a new type of elastic fiber developed to address the certain limitations of spandex in textile applications.
Features of SSY elastic fiber
① Comfortable and elastic,
② Can be strongly twisted: It still has moderate elasticity after strong twisting, which can increase the drape of the fabric.
③ Good recovery: It has good elastic recovery and the fabric is not easy to deform.
④ Alkali resistance: The fiber is not affected by the amount of alkali and reduces elasticity, and has dimensional stability. The amount of alkali can improve the feel of the fabric, making it light and dry.
⑤ Unique feel.
It solves the weaknesses and shortcomings of the original spandex elastic fabric, such as fear of chlorine bleaching after finishing, difficulty in shaping, unstable elasticity, difficulty in care, easy blistering, and excessive elasticity , wearing stuffy clothes, etc. At the same time, SSY can also be interwoven with various other fibers to obtain more new styles of fabrics, further improving the quality and performance of clothing fabrics, and meeting the needs of modern people pursuing a higher level of “quality life.”
Uses of SSY elastic fiber
This new type of elastic fiber can be used to process all kinds of textile fabrics , the technological performance of textile processing is excellent and simple, and it is especially suitable for the production of woven and knitted denim fabrics, elastic fabrics, elastic shirts, suits and trousers, elastic women’s clothing, women’s underwear, summer T-shirts and women’s fashion, etc. This product is mixed, blended, and interwoven in different proportions with natural fibers such as cotton, wool, silk (silk), and hemp, synthetic fibers such as polyester, nylon, and acrylic, and cellulose fibers such as viscose, Tencel, and modal. Various textile product fabrics can be obtained, ranging from socks, sweaters, underwear to suits, and from casual wear to fashion, all of which have excellent functions and wearing comfort. Especially compared with spandex covered yarn, it has incomparable advantages. It can overcome the difficulty in processing spandex elastic fabric and the trouble of use and care, and has many of the advantages mentioned above.
Precautions for processing and using SSY elastic fiber
① Suitable for twill weave, if plain weave try to avoid one Up and down structure. If SSY is used as weft yarn, the warp yarn structure should be looser to facilitate elasticity. SSY weaving tension should be controlled below 0.9×denier (Dtex). Tissue density takes into account fiber shrinkage.
② It must be weaved on a wide-width loom, a loom above 1900mm, and the width will be 1500-1600mm after shrinkage treatment.
③ Pre-shaping should be carried out before dyeing and finishing to make the SSY shrink and show elastic characteristics. The basic method is to cook it in boiling water for 15 minutes in a relaxed state, avoiding external force.
④ Disperse dyes are used for dyeing. The dyeing temperature is 115 to 125 degrees. The initial dyeing temperature and heating rate are slightly lower than PET. Too high temperature will affect the elasticity.
⑤ During the setting process, avoid excessive tenter width. The setting temperature should not exceed 170°C. Adjust parameters such as fabric elasticity and feel.
⑥Because SSY has a moisture-absorbing and quick-drying functional structure, try to avoid water-repellent additives during textile finishing to retain its characteristics.
⑦The new wrinkle machine can process wrinkles at one time and increase the style of the fabric.
The difference between SSY and other high elastic yarns
Nowadays, there are more and more polyester elastic yarns , and everyone calls it high elastic yarn, here is a brief summary:
PWY: Produced by South Korea Huvis and Hangzhou Huvis, it is a DTY type, all PET, mechanically elastic , the yarn itself is elastic, and repeated stretching will weaken the elastic recovery. Cheap, slightly elastic.
PBT: Some customers call it T300, which is produced in Hangzhou Huvis, Jiangyin, and Changzhou. It is a type of polyester and is different from ordinary PET slices. Compared with ordinary PET, PBT has lower strength, greater elongation at break, 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.
T400: A bi-component elastic fiber produced from DUPONT PTT slices. The brand of Invista is T400, and the brand of South Korea’s Huvis is ESS (or ESM). , has greater elasticity, good recovery, and soft and waxy feel. It is the most successful elastic yarn developed in the past 5 years. Due to the start of domestic production, South Korea no longer produces conventional varieties. Domestic consumption is still large, and the price has become very affordable.
SSY: A brand of all-PET two-component filament produced by South Korea Huvis Company. It has good elasticity, good recovery, smooth feel and good drape. This product has been sold for more than 10 years, and the price has stabilized. The market has improved again in the past two years, and sales in women’s clothing fabrics are very good. Fine-denier varieties have also been successfully developed for knitting applications. South Korea’s Huvis Company has recently launched a series of high F-number SSY, high elasticity HSY, and low shrinkage yarn feel FIS, and the market outlook is promising.
SPH/SPY: One-step spinning SSY has slightly different feel and shrinkage than SSY. It is cheaper but less stable.
Due to the increasing demand for elastic fabrics in the fabric market in recent years, some characteristics of spandex fiber can no longer satisfy all customers, so more and more polyester factories have begun to develop polyester Elastane-like fiber. Polyester elastic fiber has the advantages of acid and alkali resistance, chemical resistance, good elastic recovery, not easy to age, simple processing, good dyeability, moderate elasticity, etc. It is being developed in many aspects such as chemical fiber woven fabrics, knitting, denim, wool spinning, etc.
In addition, PWY is DTY type, the yarn itself has elasticity, SSY is FDY type, and the elasticity can only be reflected after dyeing and finishing. </p
