As one of the five synthetic synthetic fibers, polyester staple fiber has many classification standards. The most commonly used ones in the market are divided into large chemical fiber, medium chemical fiber and small chemical fiber.

Chemical fiber: Polyester staple fibers spun or melt-spun with PET chips. Good color, large batch number, strong stability, few defects, good spinnability.

In the chemical fiber: using external PET chips or PET back spinning. The quality of the price is between Dahua and Xiaohua (mainly used by some spinning mills and Dahua blended to increase competitiveness).

Small chemical fiber: spinning back with PET. Inconsistent prices and quality, suitable for export to markets and areas where quality requirements are not too high (such as fillers, etc.).

In general, the staple fiber spun by the chip basically has no defects, the fiber thickness is uniform, the surface is smooth, and the touch is smooth (however, the short fiber is used wherever it is, and the rough line is different from silicon and silicon). Pulling, the general strength of slice spinning is better, the batch number is large, there is no color difference, and physical indicators are uniform.

Generally small chemical fiber production, or the use of renewable raw materials produced by the short fiber batch number is small, the same algebra feel is not good for large chemical fiber (except after treatment), many occasionally have uneven thickness, extra long and general objective existence, The physical indicators of conventional recycled materials are somewhat poorer.

After understanding the classification of polyester staple fiber, it can better grasp its characteristics so that it can be applied to the corresponding field.