MicroStretchTM elastic fiber
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MicroStretchTM MicroStretch fiber is an elastic fiber based on a new type of network cross-linked polyolefin material. It has excellent chemical stability and can carry out efficient chemical dyeing and finishing. For the dyeing and finishing of viscose/MicroStretchTM elastic fiber knitted fabrics, different pre-forming temperatures of natural cotton fabrics are set, and pre-processing and coloring are carried out according to the non-elastic fabric process to test the performance of the finished product. The results show that knitted fabrics made of MS stretch yarn do not require high-temperature preshaping, and their performance indicators can reach the performance of traditional R/S fabrics.
Spandex fiber has excellent fatigue resistance and extremely high elastic recovery rate, which has caused the market demand for spandex to increase rapidly. However, spandex also has shortcomings such as poor chlorine resistance, poor resistance to strong acids and alkalis, easy aging, and poor colorability. Therefore, product differentiation has become one of the trends in the development of the spandex industry, such as super chlorine-resistant spandex, finished spandex, single-hole spun spandex, etc. Spandex yarn, etc. At the same time, some elastic fibers with good chemical resistance, elasticity and recovery properties have also appeared on the market, such as PTT fiber, DOWXLA fiber, soft and comfortable type, casual type and other new elastic fibers. This article introduces MicroStretchTM elastic fiber, its elasticity principle and excellent characteristics, focusing on its dyeing and finishing process in knitted fabric applications.
1 MicroStretchTMCharacteristics of stretch fiber
Principle of elasticity
MicroStretchTM MicroStretch fiber (MS for short) is a high-tech elastic fiber based on a new network cross-linked polyolefin material. The fiber is mainly composed of the molecular structure of soft chains, forming a crystalline network molecular structure. The crystallinity of the fiber and the length of the soft chain are the main factors that determine its elasticity and resilience. Its unique molecular structure makes MS elastic fiber have excellent chemical stability, including heat resistance, aging resistance and resistance to strong chemical reagents, etc., which allows fabrics and clothing to undergo efficient dyeing and finishing chemical finishing processes, giving fabrics Good wearing properties, such as comfortable elasticity, recovery performance and long-lasting stability.
Fiber properties
Traditional elastic fibers have many disadvantages, such as:
(1) The temperature resistance is poor, but it must be set at high temperature during finishing;
(2) It has poor resistance to strong acids and alkalis and is easily damaged during finishing;
(3) The chlorine resistance and ultraviolet resistance are poor, and the elasticity is reduced or even lost;
(4) Internal stress is difficult to remove and dimensional stability is poor;
(5) It ages easily, has a short shelf life, and loses elasticity.
MS stretch fiber overcomes the shortcomings of traditional elasticity. Its main features are:
(1) The temperature resistance reaches above 220℃, and it has excellent dimensional stability without high temperature setting;
(2) It has excellent resistance to strong acids and alkalis, and can withstand harsh finishing and post-finishing processes;
(3) It has excellent chlorine resistance and has unique and excellent application prospects in swimwear;
(4) It has unique chemical inertness and excellent aging resistance;
(5) It has the characteristics of small modulus, high elongation and low strength, comfortable to wear and no tight feeling;
(6) Green and environmentally friendly, no pollution throughout the process, low energy consumption, energy saving and emission reduction. These properties give the fabric comfort, elasticity, and dimensional stability, and garments made from this fabric can be ironed-free.
However, MS elastic fiber fabric also has certain shortcomings, such as low modulus, high elongation and low strength, and there is significant relaxation after repeated stretching. For clothing fabrics, it is easy to deform. This results in poor shape retention of the work clothes, causing difficulties in production and finishing.
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