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Measures To Prevent Crease Of Spandex Fabric

Changzhou Haoyuyang Textile Co.,Ltd | Updated: Aug 09, 2017

  I. Measures to prevent crease of spandex fabric

  1. Storage mode

  In order to improve the performance of spandex fabric in spinning, silicone oil lubricant and other additives are used in weaving process. These auxiliaries will naturally degrade over time, resulting in a yellowing of the fiber and a decline in the elasticity of the fabric. "Hardening at room temperature" is a potential problem that can cause lasting creases. If the fabric is stored for more than 3 months, it should be enclosed in airtight, opaque plastic film. More importantly, after weaving immediately after the opening amplitude of the volume, to avoid the chance of indentation.

  2. Reservation type

  The inner stress of the spandex fabric inside the fiber after the next machine has some weaving. The purpose of preheating and setting is to eliminate stress through the yichi process of fabric, so that the size of fabric is fully stabilized, and the permanent crease of fabric is eliminated. If the coil is formed during the cylinder weaving and the second coil is on the left side of the first coil, then the orientation should also be 7%~10% (relative width) in front of the left, making it consistent with the twist of the finished product.

  The best scheduled scheme is:

  Relaxation → steam steaming (no steam steaming conditions of the rolling hot water 80 ℃) → super-feed booking → (into the fabric pretreatment → stereotypes → printing).

  Most dyeing plant because there is no steam equipment and direct rolling water into the stereotypes, when the temperature below 10 degrees (winter), spandex fabric easily produce creases. Fabric through the steam tank relaxation after the stereotypes, will receive satisfactory results. Heat setting temperature is good between L85~190℃, time 45~60 S. The setting temperature is too high, which will make the fabric yellowing. At the same time, if the impurities and auxiliaries in the fabric are partially degraded by the influence of baking, the degradation material will be difficult to remove when it is transferred to the inside of the fiber, so that the scars are very hard to be removed in the back-road processing. Dyeing of the interior of the fiber will be the first adsorption of dyes, and in the process of heat preservation has not been able to precipitate the formation of deep stain, even if the stripping of color, will remain in the fabric, but also affect the spandex fastness. Therefore, should not 195 ℃ above the high temperature predetermined type (spandex softening temperature is about 200° above), the width of the shape than the fabric width l0%~l5%, so that in the VAT in the pretreatment when there is a full response, so that the internal stress of Spandex fabric completely eliminated. Semi-product stereotypes, must be based on the original design of the process, in general, the shape of the width of the product width than the finished $number around, the rate of shrinkage control in the finished product requirements of the shrinkage, the elongation of the tape is equal to the proportion of the drawing. If it is one-sided needle weaving, then also need to paddle cutting edge and the best twist control, reduce the torsional degree produced by the printing weft. The width of the pulp edge is about LCM, and the breakpoint is slurry. Not too thin or too thick, too thin to play a role, too thick will affect the printing effect near the edge of the cloth. Pigment printing due to stay on the surface of the solid slurry will increase the weight of the fabric square grams, so in the width, shrinkage rate in line with the conditions, gram weight can be slightly lighter.

  II. pretreatment

  Silicone oil and lubricants can damage the dye uniformity, resulting in a decrease in color fastness, so before dyeing should be removed from the fabric as far as possible. Elastic fiber blended fabric dyeing before the residue of oil is usually invisible, but the metal complexing dye is lipophilic, that is, the oil stain on the fabric at the beginning of the dyeing process with its affinity. When the dye temperature rises, the oil is emulsified, but the dye retains the stain that can not be eliminated. Spandex fabric content is higher than 5% elastic fiber pretreatment is recommended for the use of Spandex oil remover to achieve the ideal oil removal effect. In order to prevent the return of oil agent, effective washing method is to use hot water thoroughly overflow bleaching, with cold water for the final bleaching.

  The need to print knitted fabric also to pass the pretreatment, remove cotton stains and grease wax quality, increase the whiteness of the fabric and improve the wool effect, so as to achieve a good printing effect. Pretreatment process can be divided into two categories, that is, traditional alkali treatment and modern biological enzyme treatment, bio-enzymatic processing in line with environmental requirements, but at present, whitening or bleaching requirements of the fabric is still very difficult to meet the requirements, so the conventional alkali treatment process is still widely used, containing spandex fabric pretreatment after the washing gradually cooling is very necessary to prevent sudden cooling caused by fiber shrinkage creases.

  III. Equipment Selection

  During the dyeing process, the elastic loss of fabric can be caused by high temperature and mechanical stress. In order to preserve its elasticity, more than 10% of the elastic fiber content in textiles should be dyed on the flow jet, and fabrics with an elastic fiber content of less than 10% can be dyed on air jets.

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