[polyester staple fiber in 3 categories: large chemical fiber, medium chemical fiber, small chemical fiber]
Polyester staple fiber is divided into 3 kinds: large chemical fiber, medium chemical fiber, small chemical fiber
Generally speaking, there are three kinds of polyester staple fiber in the market: large chemical fiber, medium chemical fiber, small chemical fiber.
Large chemical fiber: a short staple of PET slicing or melt spinning. Good color, large batch number, strong stability, little defect, good spinning
Medium chemical fiber: use the same PET slice or PET return. Price quality is between large and small (main spinning plant is used to improve the competitiveness of blending and blending)
Small chemical fiber: PET return material spinning. Price and quality are not available, suitable for export to some quality requirements not too high market and domain (such as filling materials, etc.)
In general, use slice spinning staple it little defect, fiber thickness uniformity, smooth surface, feel is smooth, but will use short fiber, coarse generation by the difference between silicon and without silicon) by hand pull, slice spinning strength compared commonly good, batch number, without off color, uniform physical indicators.
Generally small chemical fiber production, or use of renewable raw materials to produce small batch number, short fiber algebraic feel is not the same (except processed) for big chemical fiber defects, the occasional uneven thickness, super times as long as the general objective existence, conventional reworked material to make physical indicators from slightly worse (strength, etc.)