40results about How to "Ensure level dyeing" patented technology

The invention relates to low-color-difference polyester superbright trilobal profiled yarn and a preparation method thereof. The low-color-difference polyester superbright trilobal profiled yarn is prepared through carrying out spinning on polyester and has the rupture strength not lower than 3.8cN / dtex, the breaking elongation of 33.0+ / -3.0% and the color difference [delta]E smaller than 0.200. According to the low-color-difference polyester superbright trilobal profiled yarn and the preparation method thereof, ethylene glycol magnesium is relatively mild, has a very small thermal degradation coefficient and causes less side reactions during reaction, so that the production of oligomers during processing is reduced; the mass percent of the oligomers is lower than 0.5%, and the mass percent of diethylene glycol is lower than 0.5%. The oligomers are reduced during polymerization and are further reduced during washing, so that during the dyeing and postprocessing thermosetting of polyester fibers, the amount of the oligomers migrating to the outside of the fibers from the inside is reduced, the occurrence of color spots and streaks is reduced, and the level dyeability and rubbing fastness of the fibers are guaranteed.

The invention relates to the technical field of textile production, in particular to a process for thickening the hand of polyester printed fabrics, comprising the following steps: S1, weaving: weaving into grey fabrics through a double-needle bed Raschel knitting machine; S2, presetting: The grey cloth in S1 is sent to the drying room through the conveyor belt for pre-forming, the vehicle speed is 20-25m / min, the temperature is 200°C, the air speed in the drying room is 1200-1500r / min, and the time is 100-120s; S3, dyeing: Pre-forming in S2 The finished grey fabric is transported into the atomizing nozzle of the high-temperature and high-pressure airflow dyeing machine, and the following dyeing auxiliaries are introduced into the dye liquor tube in the airflow dyeing machine: disperse dyes, leveling agents, and the dyeing process is at a temperature of 120-130°C, The holding time is 30-50min; it realizes the dyeing with the atomized dye solution twice before and after, so that the dyeing rate is good, the dyeing is uniform, and the dyeing property is improved. By continuously accelerating the high-speed airflow, the wound grey fabric can be fluffy and blown, which further improves the To ensure level dyeing performance, at the same time to ensure that the dyed grey fabric feels soft and thick.

The invention relates to low-color-difference polyester super-soft ultrafine yarn and a preparation method thereof. The low-color-difference polyester super-soft ultrafine yarn is obtained by polyester spinning. A high-dye-uptake polyester fiber super-soft ultrafine yarn is greater than or equal to 3.8cN / dtex in breaking strength, is 35.0+ / -3.0 percent in elongation at break, is 0.20-0.50dtex in single yarn size, and is less than 0.200 in color difference deltaE. Ethylene glycol magnesium in the ultrafine yarn is relatively mild and is very small in thermal degradation coefficient, less side reactions are caused in a reaction process, and the production of oligomers in a processing process is reduced; oligomers produced in a polymerization process are reduced, and oligomers produced in a dissolving-washing process are further reduced, so that the quantity of the oligomers migrating from the insides to the outsides of fibers are reduced in polyester fiber dyeing and post-processing heat setting, the occurrence of color spots and stripes is reduced, and the fiber levelling property and rubbing fastness are ensured. The softness of a super-soft ultrafine polyester fiber is reflected by a very small yarn size and a small composite-yarn total size, and a fabric made of the super-soft ultrafine polyester fiber has very soft and fine handfeel, is soft in color and luster, and is comfortable and breathable.

The invention relates to a low-color difference polyester different-shrinkage composite yarn and a preparation method thereof. The low-color-difference polyester different-shrinkage composite yarn is obtained by compounding polyester POY yarn and polyester FDY yarn; the polyester POY yarn and polyester yarn Ester FDY yarn is obtained by spinning polyester after melting and washing. The breaking strength of the low-color difference polyester differential shrinkage composite yarn is ≥1.9cN / dtex, the elongation at break is 30.0±5.0%, and the crimp shrinkage rate is 2.50 ±3.0%, the degree of network is 20±5 / m; the color difference ΔE is less than 0.200; the magnesium ethylene glycol in the present invention is relatively mild, its thermal degradation coefficient is very small, the reduction of oligomers in the polymerization process, the dissolution and washing process The oligomers are further reduced, which reduces the occurrence of stains and streaks in polyester fiber dyeing and post-processing heat setting, and ensures fiber level dyeing and rubbing fastness. Different shrinkage composite yarn has excellent shading performance, excellent dyeing performance, high bulkiness and soft hand feeling, and because there are many loops on the surface of the fiber, it also eliminates the aurora defect of chemical fiber filaments.

The invention relates to a low-chromatic-aberration bright polyester DTY and a preparation method thereof. The low-chromatic-aberration bright polyester DTY is obtained through the steps that polyester is processed through soluble washing and then processed through melt spinning processing by special-shaped spinneret orifices; the breaking strength (cN / dtex) of the low-chromatic-aberration bright polyester DTY is larger than or equal to 4.0, the elongation at break (%) is 25.0+ / -2.5, the end section of the DTY is in the shape of a regular triangle, and the chromatic aberration delta E is smaller than 0.200. According to the low-chromatic-aberration bright polyester DTY and the preparation method thereof, ethylene glycol magnesium is milder, the thermal degradation coefficient is very small, side reactions caused in the reaction process are few, and generation of oligomers in the processing process is reduced; in the polyester fiber dyeing and post processing heat setting processes, the quantity of the oligomers which migrate from the interior of the fiber to the exterior of the fiber is reduced, occurrence of color spots and strip patterns is reduced, and the fiber levelling property and crockfastness are guaranteed. The bright polyester DTY has the real silk-like gloss and softness, the fabric bright sensation and the soft and elegant silk light sensation, has the excellent optical property, is thick and solid in fabric handfeel and good in bulkiness and air permeability and has the superbright flashing effect.

The invention relates to low-color-difference polyester wool-like different-shrinkage complex yarn and a preparation method thereof. The low-color-difference polyester wool-like different-shrinkage complex yarn is prepared through carrying out fiber intermingling on low-color-difference polyester POY (Pre-Oriented Yarn) and low-color-difference polyester FDY (Fully Drawn Yarn), wherein the low-color-difference polyester POY forms small yarn loops which surround the low-color-difference polyester FDY; the low-color-difference polyester POY and the low-color-difference polyester FDY are made from polyester through carrying out dissolving and washing and then carrying out spinning. The low-color-difference polyester wool-like different-shrinkage complex yarn has the rupture strength not lower than 3.0cN / dtex, the breaking elongation of 40.0+ / -3.0%, the crimp contraction of 5.50+ / -3.0%, the interlacing degree of 95+ / -5 / m, the fiber number of 150dtex to 300dtex and the color difference [delta]E smaller than 0.200. According to the low-color-difference polyester wool-like different-shrinkage complex yarn and the preparation method thereof, ethylene glycol magnesium is relatively mild and has a very small thermal degradation coefficient, and the oligomers are reduced during polymerization and are further reduced during washing, so that during the dyeing and postprocessing thermosetting of polyester fibers, the amount of the oligomers migrating to the outside of the fibers from the inside is reduced, the occurrence of color spots and streaks is reduced, and the level dyeability and rubbing fastness of the fibers are guaranteed.