Textile Quality Control – Style Control


Fabric style generally refers to the unique attributes of the fabric that are different from other products, mainly including appearance and intrinsic property. Usually the appearance can be clearly displayed, and accepted by producers and customers, such as crepe pattern, small rhombic, beadlike particle patterns on the surface. The appearance is one of the major parts of fabric style.The intrinsic property sometimes needs to be identified by the examiner, using some simple methods, such as the feel and elasticity of the fabric. Fabric style control primarily refers to how to control the various process conditions which form the fabric style.

1. Crepe Fabric

Crepe fabrics mainly include two types, one is caused by the special structure of the fabric, and the other is the deliberately increase weft shrinkage of the weft elastic fabric in the dyeing and finishing process. Some fabric crinkle patterns are formed by extrusion, and such products can also be embossed fabric. In the processing of crepe fabrics, shall focus on the key steps from pre-shrinking to pre-setting, from dyeing to drying, and finally to finalizing fabric setting.

Crepe fabrics include warp crepe fabrics and weft crepe fabrics, typically warp crepe fabrics. Due to the excessive shrinkage of the weft yarn during processing, the warp yarns are not able to properly contract with the weft yarn to form irregular streaks on the surface. In order to maintain these streaks, the weft processing tension during processing must be minimized. For example, during pre-shrinked step in the dyeing cylinder, the pressure of the dyeing cylinder nozzle can be appropriately increased to increase the warp pulling force of the fabric. In the drying and setting of the finished product, appropriately reduce the width by increasing the warp tension of the cloth, sufficiently retaining the warp streaks.

2. Bubble Fabric

There are many methods for making bubble fabric. Cotton fabrics can form enormous blister-like small ridges on the surface of the fabric by  alkali-contract, can also form small diamonds-like or perlitic particles on the surface of the finished fabric through adjusting structure of the fabric and the density of warp and weft. bubble fabrics are different from crepe fabrics.Bubble fabrics shall pay attention to reduce tension of both warp and weft directions during producing. The reduction of warp tension includes not only the pre-shrinking, pre-setting and dyeing stages, but also the drying setting stage of the finished product.

The surface of the cotton poplin fabric has distinct small rhombic patterns, which not only requires the necessary design requirements for the warp and weft density of the fabric, but also need the coordination between warp tension and width during the setting of the finished product. Thin polyester bubble fabrics need to reduce the tension of both the warp and weft directions during the pre-shrinking, pre-setting, dyeing and setting stages, especially focusing on temperature and warp tension of pre-shrinking and dye the fabric when drying. . If the drying temperature is too high, and the warp tension is too large, the style of the fabric surface will be seriously affected. The use of loose-drying equipment to dry the fabric at a lower speed can preserve the style of the fabric, is the key point of control of bubble fabric surface.

3. Embossing Fabric

Conventional embossing is done on embossing machine. The electric calender can complete the embossing process after replacing the roll with the pattern. During ginning, the warp tension, roll temperature and knurling speed of the fabric are the main process parameters. The embossed fabric is usually suitable for decorative textiles, and a small portion is used for women's wear. Maintaining the permanent shape of the embossed fabric is a problem that must be paid attention to during the use of the embossed product. The relatively intense process conditions in the embossing process are the basis for maintaining the permanent shape of the embossed product. When formulating process conditions, both production efficiency and product quality should be considered, as well as the fabric's own bearing capacity.

4. Sanded Fabric

For woven fabrics, sanding process becomes more and more common. For high yarn count and high-density cotton fabrics, bio-enzyme polishing after sanding is a new type of processing technology. sanding not only improves the surface properties of the fabric, but also improves the hand feel of the fabric. Uniform, thick and short is the basic property for sanding. The fabric structure, density, fiber characteristics, sanding method, sanding speed, the flatness of the fabric during sanding will significantly affect the quality of the sanding.

Post time: Oct-30-2019