Polyester fiber is divided into two types: filament and short fiber. The so-called polyester filament is a filament with a length of more than one kilometer, and the filament is wound into a group. The polyester staple fiber is a few centimeters to ten centimeters of short fibers.

Differences in the raw materials used for different polyester staple fibers

Large chemical fiber: CHEMICALFIBER uses PET chip spinning or melt direct spinning short fiber.

Features: good color, large batch number, stable strength, few defects, good spinnability.

Small chemical fiber: SMALLCHEMICAL FIBER is spun with PET regrind.

Features: The price and quality are uneven, suitable for national conditions, and exported to some markets and fields where the quality requirements are not too high.

Differences in equipment used for different polyester staple fibers

"Big Chemical Fiber", "Medium Chemical Fiber" and "Small Chemical Fiber"

First of all, this is a popular saying in the market, and there may not be an accurate definition. All three are for polyester staple fibers (polyester staple fibers), and other chemical fiber product types are not included for the time being.

To put it simply: "big chemical fiber" Generally, large-scale chemical fiber enterprises use high-quality chips to directly produce fibers. The technology is relatively advanced, the equipment is mostly imported, and the product quality indicators are ideal and stable, and the spinnability is relatively high.

On the contrary, at present, many small chemical fibers on the market are made of chips made of recycled raw materials such as cola bottles in production. At the same time, the process is relatively backward, and most of the equipment is made in China. The fiber quality is obviously affected, but the cost is much lower than that of large chemical fibers, and some quality requirements are required. Yarns that are not high can be mixed with some small chemical fibers.

"Large chemical fiber" products refer to polyester staple fibers spun by relatively sophisticated imported and domestic production equipment, using polyester melt direct spinning method or polyester chip indirect spinning method. Since the raw materials used in "big chemical fiber" products are basically qualified grades, the quality indicators of its regular products are excellent. "Big chemical fiber" polyester staple fiber is the leading raw material in the cotton textile industry. The "big chemical fiber" production equipment is the equipment for eating "fine grains".

The vast majority of the production equipment for "Sinochemical Fiber" products and "small chemical fiber" products are produced by domestic small chemical fiber machinery factories. This kind of production equipment is far away from the production equipment used by "big chemical fiber" in terms of scale and quality, so the products produced by this type of equipment and the products produced by "big chemical fiber" also have obvious differences. quality difference.

Because of this, "China Chemical Fiber" and "Small Chemical Fiber" equipment generally use polyester chips and recycled polyester bottle chips and foam materials as raw materials for polyester staple fibers. "China chemical fiber" and "small chemical fiber" production equipment is the equipment for eating "coarse grains".

The equipment used for "medium chemical fiber" and "small chemical fiber" is basically the same. The main difference between them is that "Sinochem Fiber" generally uses external products produced by regular polyester chip manufacturers and recycled polyester bottle chips imported from abroad that have been well-treated. The raw materials used in "small chemical fibers" are basically general recycled polyester bottle flakes, polyester recycled waste silk and waste, and polyester foam materials.

Product use of different polyester staple fibers

"Large chemical fiber" products have a wide range of applications. "China chemical fiber" products can replace "big chemical fiber" products in some applications, thus providing larger profit margins for downstream products. "Small chemical fiber" products are generally used in the fields where the quality of short fibers is not high, and the production of lower-grade products (thicker yarns than 30s, sprayed cotton and filling materials, etc.).

"Medium chemical fiber" and "small chemical fiber" polyester staple fiber products have relatively small investment in equipment, relatively low raw material prices, and can be used instead of "large chemical fiber" products in some application fields, so they have larger profit margins, and are deeply loved by the downstream. Product manufacturers are welcome.

How to distinguish polyester staple fibers

You can bleach it to see the color, the Dahua color is bright and the neutralization is worse, the Dahua color is good; and then you can see if there is fluorescence, the Dahua is not.

Optical white polyester staple fiber supplier

Jiangyin Yongbang Chemical Fiber Co., Ltd. mainly produces all kinds of white and black regenerated short fibers. It has rich production experience and is widely used in spinning, non-woven fabrics, home textiles and other fields. The Optical white polyester staple fiber produced is cheap and reliable. If you need it, please feel free to contact us at 16266316316 or email to jackbian@yongbangpsf.com, we will serve you wholeheartedly.