Guide to Crease Recovery

 

The crease recovery property of fabric is one of the important indexes to evaluate the properties of fabric. Measuring the crease recovery angle of folded fabric samples by instrument is a common method to measure the crease recovery property of fabric.

Crease recovery properties of fabrics

When the fabric is used and stored in the process, due to folding, bending arch, compression, washing and other external forces to produce local deformation, the formation of creases or wrinkles. Even after the external force is removed, it fails to return to the original flat state, which is called creasing. Creases seriously affect the appearance of the fabric, and the wear of the fabric is often produced along the direction of creasing, accelerating the damage of the fabric. It is of great significance to understand the crease bending and recovery process of fabric and its mechanism to test the crease recovery performance of fabric.
Generally, the formation of fabric creases can be divided into two stages: fabric creasing under the action of external force and fabric creasing recovery after the removal of external force. Crease generation: Under the action of external force, the fabric bends and deforms, because the external force is much greater than the resistance of the fabric due to bending. Therefore, the fabric is forced to bend and deform, that is, beyond the flexural elastic deformation range of the fabric, resulting in yield deformation. This deformation includes the slip dislocation between the warp and weft yarn lines of the fabric, the slip between the yarn fibers, and the stretching deformation of the fibers under the action of external forces. When the fabric reaches a certain deformation, the internal stress of the fabric weakens with the extension of the external force acting time, that is, the stress relaxation occurs. Therefore, whether the fabric produces creases depends on the shape variable of the fabric and the relaxation state of the internal stress of the fabric.
Crease recovery: After the external force is removed, the fabric under the action of the elastic recovery force generated by the internal stress, the crease bending of the fabric begins to recover, that is, the Angle of the crease recovery begins to increase. The crease recovery Angle increases with time, and its change is similar to that of material creep. In this process, in addition to the elastic recovery force of the fabric, it is also affected by friction resistance. The friction resistance is caused by the relative slip between yarns and between the fibers of the yarn, and its direction is opposite to the elastic recovery force. When the elastic recovery force and friction resistance of the fabric are balanced, the fabric achieves the maximum recovery effect, and the fabric fold Angle is the crease recovery Angle of the fabric.

Fabric crease recovery tester

Fabric crease recovery tester is used to determine fabric recovery ability after being creased an indicated with crease horizontal method. This tester is suitable for fabrics with various kinds of thickness, and can get fast and slow crease recovery index under room environment.
Get more details about fabric crease recovery tester

Comments

Post a Comment

Popular posts from this blog

Twist Test Methods and Influencing Factors

Image
  Twist test is an important part of yarn inspection. It is related to the strength, elongation, appearance, style, etc. of yarns and fabrics. Different yarns have different structural characteristics, and their twist testing methods are also different. Basic concept To understand twist testing, you must first understand what twisting is. Twisting is a necessary condition for yarn formation. Short fibers can be made into yarns with certain physical and mechanical properties through twisting; filaments often need to be twisted in order to increase the tightness between single filaments, facilitate processing, and improve fabric properties. Number of twists Twisting is to cause two cross-sections of parallel straight fiber slivers to rotate relative to each other. The number of relative rotations of the two cross-sections is called the number of twists. Twist Twist refers to the number of twists per unit length of yarn . Twist coefficient In actual production, the twist coefficient is of
Read more

Combing Process in Spinning

Image
Before processing cotton, wool, and silk fibers into fabrics, the process of removing impurities and short fibers in the fibers with a combing machine is called combing. The texture, washability and durability of the fabric produced through this process are greatly improved compared with carded fabrics. The following introduces the composition of the combing machine and the combing process. The kinematic coordination relationship of the main parts on the combing machine is indicated by a dial. The disc is mounted on the combing machine and rotates synchronously with the cylinder, which is generally called the indexing disc. The index plate is divided into 40 equal parts along the circumference, and each equal part is 9°, which becomes one index. The working cycle refers to the time interval between the combing cylinder of the intermittent combing machine corresponding to the two actions of combing the whiskers. That is: the first row of needles in the combing cylinder goes to the botto
Read more

Garment Dyeing-Special Dyeing Method In Textile

Image
Garment dyeing is a relatively special dyeing process for textiles and garments. Many people may not know much about this dyeing process. In the impression of most people, textile and clothing products are dyed in the fabric period, and garment dyeing is a dyeing process that breaks people’s cognitive limitations on textile dyeing. ​What is garment dyeing ​Garment dyeing means that dyeing the one not in the fabric type but in the garment type itself. The garment type mentioned above include socks, towels, sportswear, shirts, plush toys (without fillers), T-shirts, pants, bathrobes, handkerchiefs, bath mats, carpets, scarves, etc. The material of these garments can be wool, linen, silk and cotton of natural fibers. But most garments are made of cotton or a cotton-rich blends. Garment dyeing imparts vibrant colors to garments. The clothes such as denim garments, tops, sportswear and casual clothing with garment dyeing can provide a distinctive special effect. Garment dyeing method Garmen
Read more