The so-called yarn refers to the collective name of sand and thread. The definitions in clothing materials are as follows:
"Yarn" is to arrange many short fibers or filaments in an approximately parallel state, and rotate and twist along the axial direction to form a slender object with a certain strength and linear density; while "thread" is composed of two or more two Twisted strands of single yarns.
2.1 The different raw materials used can be divided into pure cotton yarn, purified fiber yarn, cotton blended yarn, wool blended yarn, special-shaped yarn, etc.
2.2 Different spinning methods: ring spinning, air spinning, electrospinning, etc.
2.3 Different spinning processes: carded cotton yarn, combed yarn, peach wool yarn, etc.
2.4 Different twisting directions: hand twist (s twist) yarn, backhand twist (yarn z twist).
2.5 Different uses of products: yarn for weaving, yarn for knitting, yarn for raising, yarn for rope, yarn for fishing net, yarn for cord fabric, etc.
2.6 Classification by yarn structure: high elastic yarn, low elastic yarn, bulky yarn, network yarn
Three case studies
The polyester yarn used in this example is used in special places, and there is no problem with wear resistance. However, in the case of alkalinity and high moisture content, the service life of the product is greatly shortened, which affects the performance of the product. Therefore, It is necessary to develop polyester with the characteristics of friction resistance, acid, and alkali resistance and waterproof under alkaline conditions.
As we all know, polyester is acid and alkali resistant. Under alkaline conditions, polyester will be reduced by alkali and corroded, resulting in fiber damage and affecting the service life. If you want polyester to be able to last under alkaline conditions, .. the yarn must be waterproofed.
The above explanation seems to solve the problem, but it is not. The yarn used this time is required to be wear-resistant, so there will be a wear-resistant agent on the surface of the yarn. The abrasion-resistant agent is firmly wrapped on the surface of the yarn, and the water-repellent agent is completely rejected. How to solve this problem is the difficulty of this program.