| Cotton fabric has been favoring by consumer for a long time due to its excellent properties such as hydrophilicity, breathability, soft handle, comfort, antistatic property, etc. However, the appearance and wearability of cotton clothing will be greatly affected when crease on the surface of the fabric forms due to the awkward shape retentiveness and elasticity of cotton fiber. Frequent ironing must be applied after washing so as to regain its wearability. In this regard, anti-creasing finishing must be applied to cotton fabric to improve its crease resistance.Conventional Pad-Dry-Cure (PDC) anti-creasing finishing has been used to grant the fabric with excellent crease resistance, but side effects emerged at the same time when deteriorated strength, stiffer hand and bad moisture and vapor transferring properties were noticed during use. Another concern stands in the hazard of chemicals on the surface of the fabric that will contact skin; the chemicals are uploaded when both sides of the fabric are immersed in the solution during the treatment. Crease resistance can also be achieved by adding crease resistant fibers into the yarn of the fabric. A good example of this is the Polyester/Cotton blend fabric in which polyester serves as the crease resistant parts. This method not only brings the fabric with crease resistance but also hardly affect the original properties of the as-treated fabric. Therefore, the aim of experiment is to reduce the content of anti-creasing composition so as to improve the overall performances of the fabric. A partial crease resistant treatment was conducted instead of anti-creasing treatment to the whole fabric. To this purpose, it will be more practical to conduct blending of anti-crease component into the spinning and weaving process and one side finishing of fabric.In experiment, high count cotton yarn (160s) was pre-treated by anti-creasing, and then plied into2-plying yarn and4-plying yarn by twisting the pre-treating yarn and original yarns according to different proportion followed by a delayed-curing process. It was found that there was a similar variation to pre-treated and cured single yarn and plying yarn in breaking strength, elongation at break, breaking time, and work of fracture. Wrinkle recovery angle (WRA) of yarn was also measured. WRA and bending rigidity of yarn increased after delayed-curing, and the increase showed a positive correlation to the content of pre-treating yarn. FTIR, WXRD, and elemental analysis showed that the covalent crosslink reacted between finishing agent and fiber macromoleculars after curing the pre-treating yarn, but the crystal structure of the fibers was unchanged. The the flat and twisty ribbon morphology of cotton fiber didn’t change much after treatment. To pre-treating cotton yam after crosslinking, the thermal degradation stability of cotton fiber in yarn enhanced than that of the original yarn and pre-treating yarn, while the difference was little when compared pre-treating yarn with the original yarn. The effect of anti-creasing yarn on the properties of plied yarn has been realized through studying anti-creasing and plying properties of160s high count cotton yarn.The anti-creasing properties of cotton fibers as the original textile material were studied in this paper. BSTR decreased as the BWRA increased for the anti-creasing pre-treated cotton bundles after the dry-heating under different temperatures with various treating time. Such factors as temperature and time had a lower influence on BWRA and BSTR during the low temperature treatment than that during the high high temperature curing. Finishing agent concentration had a slight effect on the anti-creasing property of cotton bundles, while catalyst amount had a significant influence on the anti-creasing property of cotton bundles.The homogenous anisotropic blending anti-creasing yarn was produced by the blend spinning of pre-treated and original cotton fibers (which was denoted as blending yarn). After delayed curing, the blending yarn showed an increased WRA and a decreased STR as the anti-creasing fiber content increased; specifically, there was a negative correlation between WRA and STR. Furthermore, breaking elongation, breaking time, and breaking work of blending yarn were all decreased as the anti-creasing fiber content decreased in the yarn. Results of FTIR and elemental analysis showed that the cross-linkage intensified and N content enhanced as the anti-creasing fiber content increased in the cured yarn. XRD showed that the crystallinity reduced without any change in crystal structure for the fibers in cured yam; thermal stabilities were improved after curing for yarns with various anti-creasing fiber contents. These results indicated that the blending yarn could be spun successfully in laboratory and its anti-creasing performance was closely related to the content of pretreated fibers in the yarn.The experiment in factory showed that, the anti-creasing pre-treatment of cotton fiber didn’t affect the fiber spinningy and weaving abilities, this was essential to the whole production process. The three woven fabrics were dry-heat treated under different temperatures with different time. The results indicated that the curing temperature, curing time, and the anti-creasing fiber content in yam had an effect on anti-creasing properties of fabric.100%pre-treating fabrics after washing and curing, the anti-creasing effect of fabric was poor; delayed curing treatment decreased the desizing and dyeing performance of fabric, whereas the influence of desizing and dyeing on anti-creasing property of fabric was little; delayed curing treatment enhanced the mercerizing effect of fabric, while mercerizing treatment deduced anti-creasing property of fabric. This suggested that interpenetrating anti-creasing process was feasible in theory and in practice.PS-14,2AESA and sodium alginate had good compatibility, and they could be mixed together to conduct a single-sided anti-creasing finish for cotton fabric through printing pulp, indicting that the idea was feasible. By FTIR and pH data, the anti-creasing catalytic mechanism of2AESA as catalyst was studied, and results showed that the catalytic course was consistent with the acid-catalyzed mechanism. Both positive and negative faces of the finishing fabric with ATR-FTIR, elemental content, WXRD and SEM were measured to study their micro-structures. Both positive and negative faces of the finishing fabric in abrasion performance, antistatic property and moisture penetrability had certain differences, and the finishing face basically declined.Ultrasonic atomizer could uniformly and stably atomize chemicals, and the content and composition of the atomized liquid kept the same with the solution of residue and the originally solution, which could indicate that the ultrasonic atomized finishing was feasible in principle. Fabric wettability was very important during the ultrasonic finishing process, and wettability could be selected according to the experimental requirements. The pick-up of fabric increased with prolonged atomized time. After long time atomization, the atomized liquid could permeate the fabric to form the double-sided finishing. The results of ultrasonic atomized finishing showed that the WRA and STR was basically negative correlation. When the atomized liquid permeated the fabric to form the double-sided finish, STR declined rapidly, while the change of WRA was stable in the whole process. ATR-FTIR, elemental content, WXRD and SEM analysis showed that both positive and negative faces of the finishing fabric were not very distinct in micro-structures before and after finishing. This might be due to permeability of the finishing agent. Compared with the original fabric, the abrasion performance, antistatic property and moisture penetrability of both faces of the finishing fabric had declined at different extents. |
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