As apparel: Men’s wear, women’s wear, children’s wear, trousers, skirts, suits, jackets, blouses and every form of clothing are made by polyester fibres. It is mainly due to the degradation of chain links and the addition of hydroxyl groups and enhances the dye uptake of the polyester fabrics. 3.7 Effect of enzyme treatment on the low-stress mechanical properties of polyester The Kawabata evaluation tests are carried out for lipase treated and untreated fabrics of polyester. The alkaline treated, lipase treated and dyed fabrics are tested by reflectance type spectrophotometer to know the K/S values. Major advantages of PET are high strength, stretch resistance, washability, wrinkle resistance and abrasion resistance [2, 3]. have not been evaluated in depth. acids with poly-functional alcohols. Lipase hydrolyses ester linkages in Polyethylene Terephthalate (PET) and produces polar hydroxyl and carboxylic groups. Only a genuine service will treat their customer with quality research papers. 3.5 Effect of lipase treatment on water vapor permeability of polyester. • Dacron (USA) Carboxyl and hydroxyl groups on PET fabrics can be evaluated through dyeability of disperse dyes. This clearly shows that treatment enhances the dye uptake of the polyester fabrics. The treatment offers better dye uptake which enhances the color values. This intriguing biological polyester initially attracted the attention of microbiologists and managed to keep many polymer scientists occupied over the second half of the last century. The stretching in the region of 3600-3200 is responsible for the hydrophillicity of lipase and alkaline hydrolyzed polyester. You can change your ad preferences anytime. Sutures that undergo PF tend to elongate more and might cause the loss … Compression and shear properties are evaluated since it reveals the effectiveness of the enzyme treatment. From table 4 it is understood that the alkaline and lipase treated polyester fabrics are having improved water vapor permeability when compared with the untreated polyester fabrics. From table 3 it is understood that lipase treated samples are having higher absorbency characteristics compared with the untreated fabrics and alkaline treated fabrics. The compression resiliency enhances for polyester fabrics makes the fabric much softer and it retains its original shape as quickly as possible while applying low-stress load and makes the polyester fabric with low shear rigidity. Commercial or trade names of polyester 3.6 Effect of enzyme treatment on dye uptake of polyester fabrics. The fabrics are treated with enzymes with varying concentrations, treatment time as well as temperature. Further the functional group’s presence before and after treatments and the effect of enzyme treatment on the improvement of dye uptake are studied. repeating ester groups in its structure. However, PET has undesirable properties such as pilling, static and lack of dyeability associated with its hydrophobic nature. + (2n-1) H2O This intriguing biological polyester initially attracted the attention of microbiologists and managed to keep many polymer scientists occupied over the second half of the last century. TPA EG PET or Dacron The treated fabrics are dyed using disperse dye with carrier method for polyester. Looks like you’ve clipped this slide to already. But almost services are fake and illegal. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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