Research On Key Technologies Of Melt Direct Spinning Cationic Dyeable Polyester Fiber

< p > item introduction: < a href= "//www.sjfzxm.com/news/index_c.asp" > cationic < /a > dyeable dyeable polyester fiber. It is a product made from the introduction of third monomers and four monomers containing sulfuric acid groups in the conventional polyester production process. Its fabric can be dyed with cationic dyes and has the characteristics of good color absorption, bright colourful and complete chromatogram. It has become the most rapid, widely applied and potential market differentiation product in polyester fiber.

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< p > cation < a href= "//www.sjfzxm.com/news/index_c.asp" > dye > /a > dyeable polyester fiber can be directly woven into high-grade fabric, and can be blended with other synthetic fibers or natural fibers to produce wool like, linen and imitation fabrics.

But at present, the production of this kind of fiber mainly adopts the two step process route, that is, producing cationic dyes and dyeable polyester chips on the semi continuous polyester plant, then producing the cationic dyeable polyester fiber by cutting and spinning. The two step process route has the problems of high production cost, poor product quality stability and poor homogeneity, thus affecting the inherent quality of the fiber and the market competitiveness of the product.

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< p > this research is based on continuous polymerization and < a href= "//www.sjfzxm.com/news/index_c.asp" > melt > /a > direct spinning plant. By adding third monomers, fourth monomer dispensing and metering control system, the technical bottlenecks of producing cationic dyeable polyester melt and producing dyeable dyeable polyester filament and direct breaking technology, key equipment, process control and other technical bottlenecks in continuous polymerization polymerization unit are studied, and the cationic dyeable dyeable polyester fiber products with stable internal quality and greatly reduced cost are obtained to meet the market demand for differentiated multi product products.

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< p > this technology has broken through the existing problems of the two step process technology route, and can achieve high quality and low cost production. It has been popularized and applied in related enterprises, and has achieved better economic and social benefits.

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Local key projects independently developed by P > are currently in scale production, and the technology level of the project is ahead of China.

We hope that the project partners will be domestic enterprises.

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< p > related links: < /p >

< p > weaving the upper shaft and weft yarn of the warp shaft on the extra wide electronic dobby loom. The loom speed is 390 revolutions / minutes, and the nozzle is configured as 75/40.

For better analysis.

Under the condition of constant warp tension and constant water pressure, that is, the specifications of the pump are 28 millimeters, the P value of the spring diameter is 11.5 mm, the number of turns is 7.5 rings, and the length is 145 millimeters. The weft insertion process parameters are debugged and the test time is 24 hours.

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In the second test, the loom efficiency is not high; in the test 2, because the water is too long and the water is small, the time of flow and yarn to the waste side yarn is ahead, and the weft yarn is easily towed under the traction of the lack of residual water, causing the weft yarn not to enter the weft opening properly, causing the loom to stop and the weft on the cloth. In test 3, under the condition of reasonable water volume, the first water volume is properly increased, and the weft yarn is always wrapped by water in the flight. The time of the flow and yarn to the waste yarn is punctual, the residual water is just right, the weft yarn goes smoothly into the weft opening during the weft insertion time, the loom runs well, and the weaving efficiency is 99%, which can meet the requirements of normal production. < p > from the following table, it is known that in Experiment 1, due to the shorter initial water and larger water volume, the flow of yarn and yarn to the waste side yarn is later than that of the weft yarn entering the weft opening.

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< p > when weaving weave fabric with water jet weaving, the width of weft yarn is longer and the flying time of weft yarn is longer.

In addition, the water pressure should be increased to make the weft yarn straightened into the fabric, and the weft can arrive at the design time to form the fabric.

After repeated commissioning, the loom's overall efficiency can be over 98% and efficient production can be achieved.

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