Elongated Object With A Certain Strength And Linear Density
- Jul 09, 2018 -

Polyester yarn refers to the yarn spun from polyester. Polyester is a kind of fiber made by spinning a kind of polymer. At present, it refers to the fiber produced by using ethylene phthalate as raw material. The English name is "polyethylene terephthalate", abbreviated as "PET" fiber. It is commonly known as polyester in China. The so-called "yarn" is generally referred to as the term "yarn" and "line". It is defined in the material science of clothing as follows: "yarn" is to arrange many short fibers or filaments in an approximately parallel state and along the axial direction. Rotating twisting to form an elongated object with a certain strength and linear density; and "line" is a strand formed by twisting two or more single yarns. Yarn is cotton, wool, hemp, chemical fiber, etc., which are made of finely twisted and twisted fibers (usually used as raw materials for weaving), and then made of multiple strands of fine materials such as cotton, hemp, silk and wool. Fine, called the line.

Polyester fiber refers to a fiber whose main chain contains an ester group and which is made by spinning a kind of polymer. It refers to a fiber produced by using ethylene phthalate as a raw material. According to the English name of the raw material, "polyethylene terephthalate" Abbreviation, referred to as "PET" fiber. It is commonly known as polyester in China. The so-called "yarn" is generally referred to as the term "yarn" and "line". It is defined in the material science of clothing as follows: "yarn" is to arrange many short fibers or filaments in an approximately parallel state and along the axial direction. Rotating twisting to form an elongated object with a certain strength and linear density; and "line" is a strand formed by twisting two or more single yarns.

Fiber has two major characteristics: First, it is so small that people can't directly observe it with the naked eye, the diameter is usually between several micrometers and several tens of micrometers or finer; the second is that its aspect ratio can reach tens several hundred to several tens of thousands or even theoretically. Infinity, which is related to the type of fiber, makes the fiber exhibit a long mechanical property, for example, a small partial deformation occurs when the bending is twisted, and a considerable deformation is exhibited even in the elastic range when the whole is stretched. Therefore, it is simple to say that the fiber is thin and long, that is, the diameter is so small that it cannot be directly observed by the naked eye, and the ratio of its length to the diameter is several tens of times.


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