Method for producing high elastic fiber by using PET (polyethylene terephthalate) polyester, and high elastic fiber obtained by same

Abstract

The invention relates to a method for producing a high elastic fiber by using PET (polyethylene terephthalate) polyester, which comprises the following steps that: (1) a PET polyester melt sequentially enters a spinning box, a metering pump and a spinning assembly to obtain a protofiber, and the protofiber is sequentially cooled, oiled and wound to obtain a POY (Pre Oriented Yarn), wherein the production speed of the POY is controlled between 4300m / min and 4600m / min; and (2) the POY sequentially passes through a first roller, a heating source, a cooling plate, a twisting device and a second roller for drafting and twisting, the tension is stabilized by a molding roller, and the POY is lubricated by an oiling roller and is wound to obtain the high elastic fiber, wherein the heating temperature of the heating source is between 230 DEG C and 250 DEG C, the twist shrinkage rate of twisting is between 2.2 and 2.8, and the cooling temperature of the cooling plate is between 18 DEG C and 23 DEG C. The process provided by the invention has simple control and lower cost.

Description

technical field [0001] The invention relates to a method for preparing elastic fibers, in particular to a method for producing high elastic fibers based on conventional PET. The invention also relates to high elastic fibers prepared by this method. Background technique [0002] With the improvement of people's living standards, the individual requirements for clothing are becoming stronger and stronger, and products that can reflect beauty and are comfortable to wear are more and more popular among people who love life. [0003] At present, the methods of producing elastic fibers include using PBT, PET and PU, and using two or more materials to make the fibers elastic through composite spinning, and also using PET for elastic treatment to make the fibers have certain elasticity. Using PBT, PET, PU and other materials to realize the elasticity of fibers is expensive because of its raw materials, complex processing technology, and high production costs, resulting in high pric...

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Problems solved by technology

[0004] Invention Patent Publication No. CN1379129A discloses stable elastic fiber, which obtains elastic fiber by PU block, and its disadvantage is that the production cost is high and the product price is expensive

[0005] The invention patent application number is 200910262863.5, which discloses a production method of PBT high elastic yarn, which is obtained by texturizing PBT material through spinning. The disadvantage of this method is that the product cost is high, and the produced product has high static electricity. Antistatic treatment, not comfortable enough to wear

Throughout the prior art, there is no report of producing high elastic fiber with PET polyester

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