Causes And Precautionary Measures Of Chicken Paw Prints On Sweaters
First, the cause of chicken feet print.
Chicken paw prints are commonly known as wrinkles, which are named after their chicken feet.
Its formation is caused by external forces causing the fibers to bend and deform and not completely recover after loosening.
When the fabric is subjected to compression, the fibers are bent at the pressing point, the outer layer of the bent fiber is stretched, the inner layer is compressed, and the inside and outside of the fiber is deformed, which destroys the original state and leads to the change of the basic structural unit in the fiber.
When the external force is removed, the shape of the chicken is restored to different degrees with the effect of fiber type and external force and time, so that there will be a slight or serious chicken claw print. That is to say, the possibility and inevitability of the chicken foot print caused by the fabric is related to the chemical structure of the fiber.
In addition, fiber morphology, such as length, linear density, crimp, etc., and the structure of yarns and fabric specifications, processing technology are also the main causes of chicken feet.
Two. The main categories that easily cause chicken feet to print.
1, raw materials for cotton, viscose, acrylic, wool and other fine branch of poor resilient fiber.
2, single or double root into the thin fabric type single side fabric structure.
3, other new special raw materials light weight fabric.
4. High count wool and high content fine count wool blended fabric with low twist.
Three, prevention and improvement methods
1, when encountering products that produce chicken claw printing raw materials, measures should be taken when dyeing yarns. For example, adding "bathing treasure" and other auxiliaries in dyeing to enhance the lubrication and resilience of wool yarns, and improve the operability of the latter process.
2, washing and drying is the most easy to cause chicken paw printing process. For the above varieties, strict process and careful operation should be done in detail: washing temperature should not be too high, and it is best to wash at room temperature. Besides the use of surface active agent in light color, dark color can be softer, dehydrated, dry and shut down, so it is not suitable for long time to run off. Before putting it into a dryer, sweater must be flunked, so as to avoid holding the ball into the machine, and the temperature is controlled at 90-100 degrees.
After drying the cold air 3-5min is removed, it is strictly prohibited to pile up in the clothes basket for a long time. It should be placed on the inspection stand in time for sorting.
3, for a sweater with a slight chicken print, steam can be blown by steam iron, so that the fiber is completely expanded to eliminate heat. For example, the electric iron should be covered with wet cloth. When the heavy paw prints can be washed back, add "crease resist finishing agent" to reduce and remove the effect of chicken feet.
4, when spinning, we should properly strengthen the twist or increase the number of yarns to change (increase) the overall internal stress and retention of the yarn; for example, with the same 48 wool, double strands are easier to get chicken feet than three strands.
5, improve the chicken paw prints produced by using the wet setting effect of wool.
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