7. The heat setting of the heat setting is a special process of synthetic fiber and blended fabric. Printed Garden Flags Polyester is a thermoplastic fiber, with polyester fabric for hot and humid processing will result in shrinkage deformation and folding crease through the heat setting process can prevent these flaws, and choose the fabric of light, touch, strong, anti-pilling and other performance There are some degree of improvement. Heat setting temperature should be strictly controlled, otherwise it will affect the fabric dyeing properties, thermal stability and surface smoothness.
The polyester blend fabric is generally dry heat setting process, the heat setting is the most widely used device to the application of hot air needle horizontal clip chain, Teardrop Flags For Sale heat setting machine. Printed Garden Flags This machine consists of a cloth feeding devices, ultra-feed device, needle clip chain, expansion rate of the device, hot air room, a cloth cooling device and other components. Operation of the machine, the fabric overfeed device on the pin of the clip chain, the so-called "super cloth feed speed is greater than the speed of the needle clip chain, and so can reduce the fabric through to the tension, expansion rate, but also make the fabric in the Economic to be able to have a certain degree of retraction. Similar to the role of the needle clip chain mercerizing machine Cloth clip the chain, the two ring long chain needle plate, run the clock board Jian Zhen piercing about selvage, to drive the fabric forward run into the hot air room, Cheap Custom Teardrop Flags and gradually expand increase. Circulating flow of hot air, Colored Flags At Beach hot air room temperature control in between the glass transition temperature of polyester fibers and softening point of 190 ~ 210 ° C is more appropriate after 15 the ~ 3Os role, send hot air room fabric by the needle clip chain to the appropriate speed fabric cooling, Printed Garden Flags heat setting state to be fixed, drop cloth, cold wind to the cloth around the roller by the large cold water to cool down, so that the fabric temperature dropped to below
There are several heat setting process order. ① fabric shaped to eliminate internal stress generated by the fabric in the textile process, dyeing and finishing without causing serious distortion and eliminate wrinkles wrinkled skirt. However, due to amorphous when the high temperature will result in desizing and to oil problems, this method is rarely used. ② intermediate amorphous, amorphous process arrangements after the bleaching, dyeing before, this method will not affect the desizing process, pre-treatment can remove wrinkles generated to reduce the contraction of the fabric and dyeing processes, to avoid the low sublimation fastness dye sublimation amorphous when soiled equipment and fabrics, Advertising Feather Flags And Banners but be careful to control the setting temperature, this method is widely used. ③ After setting, is in dyer, Printed Garden Flags you can increase the soluble vat dyes to color the amount of finished product dimensional stability and flatness better, but it should be paid to the choice of dye sublimation fastness, the application of this method is less.
(C), Victoria Cotton blend fabric pre-treatment
A. Singeing singeing makes the end of the polyvinyl alcohol fiber melt shrink into a ball, bulb absorb the dye more cloth to form a color point. The dyed fabric after dyeing singeing appropriate, bleached fabric, Swooper Feather Flags Wholesale black and dark gray fabric, printed part of the fabric can be fabric singeing. Singeing, to prevent the temperature is too high or speed too slow, polyvinyl alcohol so as not to overheat and soften and even melt the fabric surface streak, stubby handle.
Two. The desizing desizing process in accordance with the slurry composition on the fabric may be available enzymatic, dilute alkali. PVA water taking into account the softening point low and high temperature concentrated alkali for a long time under yellow, should have a good and appropriate process conditions.
3. Scouring is still caustic soda scouring mainly due to caustic soda impurity effect. Scouring temperature, alkali concentration, the relationship among the alkali concentration should be low, high temperature, the time should be short, low-temperature scouring time should be long. Printed Garden Flags Rope scouring or increase steam cooking practice can be. Scouring the temperature at