Method for producing polyester ITY (Interlaced Texture Yarn) through flat drafting

Abstract

The invention discloses a method for producing polyester ITY (Interlaced Texture Yarn) through flat drafting. The method adopts a drafting machine to mix and combine FDY (Full Drawn Yarn) and POY (Polyester Pre-Oriented Yarn); the drafting machine comprises a yarn feeding pressure roller, a yarn feeding tension controlling roller, a first drafting disc, a hot plate, a second drafting disc, an interlacer and a winding roller; the yarn feeding pressure roller is pressed on the yarn feeding tension controlling roller; the method is characterized in that the finished FDY is produced by one stage process, the FDY and the POY together pass through the yarn feeding pressure roller and the yarn feeding tension controlling roller to realize yarn feeding, and together pass through the first drafting disc, the hot plate, the second drafting disc and the network device in sequence to finish the winding finally; and during the process, the first drafting disc is in a heating state, the hot plate and the second drafting disc are in a non-heating state. The ITY produced by the method has the advantages that the interlacing degree is high; the boiling water shrinkage is low and can be adjusted as needed; and the dyeing uniformity is good. Therefore, the ITY can be used to produce high-grade fabrics products, particularly knitted fabrics.

Description

technical field [0001] The invention relates to a production method of chemical fiber yarn, in particular to a production method of polyester flat-drawn ITY yarn. Background technique [0002] ITY is the abbreviation of Interlaced Texture Yarn in English, and it is usually called an optimized merged network yarn in Chinese. Polyester flat-drawn ITY yarn belongs to the polyester multi-different composite fiber in the chemical fiber manufacturing industry, and it is a new product in China. At present, the output of the chemical fiber market has risen sharply, resulting in an increasingly prominent situation of oversupply of polyester products. In addition, due to the impact of the obstruction of textile exports this year, the competition for chemical fiber products in the domestic sales market has become increasingly fierce. In order to achieve further development under the current situation, it is necessary to develop differentiated and functional fibers. [0003] The exist...

AI Technical Summary

Problems solved by technology

[0003] The existing polyester flat-drawn ITY yarn uses a drafting machine to carry out mixed fiber compounding of UDY and POY. The existing conventional drafting machine generally includes a wire feeding pressure roller, a feeding tension control roller, a first drafting disc, and a hot plate. , the second drafting disc, the network device and the winding roller, the wire feeding pressure roller is pressed on the wire feeding tension control roller, such as the ZH360-SM parallel drawing fiber blending machine produced by Shanxi Zhenghua Chemical Fiber Machinery Co., Ltd. includes the above Structure, the production method of existing polyester flat pulling ITY silk (as figure 1 shown) as follows: UDY passes through the wire feeding pressure roller, wire feeding tension control roller, the first drafting disc, the hot plate, the second drafting disc, the network device and the winding roller in sequence, wherein the first drafting disc and the second drafting disc The stretching ratio between the two drafting discs is about 3.5 times, that is, there is a speed difference between the first drafting disc and the second drafting disc. Due to the speed difference, UDY will be stretched during operation; the first drafting disc Both the stretching plate and the hot plate are in a heating state. UDY is stretched on the first drafting plate and shaped on the hot plate to make FDY. POY is directly mixed with the aforementioned FDY, guided by the second drafting plate and then passed through the network. The machine mixes FDY and POY together, and finally winds it to make the finished product ITY. This production method has the following disadvantages: 1. The step of making FDY from UDY belongs to the two-step method of making FDY, and UDY is prone to beating during the drawing process. Uneven drafting; while POY is directly mixed with FDY and then enters the second drafting disc, without effective tension control process, so the quality of ITY produced in this way is poor, and UDY and FDY are prone to uneven cohesion. And the network degree of the final produced ITY is less than 70; 2. POY and FDY are mixed and directly enter the network device, so POY has a great influence on the boiling water shrinkage of the final ITY, and the boiling water shrinkage of ITY cannot be adjusted; 3. FDY is made by Two-step method, low network degree of ITY, large boiling water shrinkage and other reasons directly lead to poor dyeability of the final product ITY. Therefore, the quality of ITY produced by the existing method is poor, and generally can only be used for low-end products, and the market competitiveness is poor.

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