Description

How to Make Ultrafine Fibers with Sea-Island Polyester Slices COPET

Sea-island polyester slices COPET are a special kind of polyester slices, which can produce ultrafine fibers with a fineness of less than 0.05D by using sea-island bicomponent composite spinning technology. In this article, we will introduce the process of making sea-island polyester slices COPET, the advantages and applications of this product, and how to contact us for more information.

The Process of Making Sea-Island Polyester Slices COPET

The process of making sea-island polyester slices COPET is as follows:

• Drying: COPET and PET (or PA6) slices are separately placed in different drying equipment, and undergo pre-crystallization and high-temperature drying, to remove the moisture and low molecular substances in the slices, and improve their melt viscosity and stability. The drying temperature and time are adjusted according to the performance and moisture content of the slices. Generally, the pre-crystallization temperature of COPET is 100~165℃, the crystallization time is 18~23 minutes, the drying temperature is lower than 165℃, and the drying time is less than 8 hours; the pre-crystallization temperature of PET (or PA6) is 120~140℃, the crystallization time is 4~5 hours, the drying temperature is 160~180℃, and the drying time is 8~15 minutes .
• Melting: The dried COPET and PET (or PA6) slices are separately fed into a single-screw or twin-screw extruder, heated to 200~250℃, melted into a uniform melt, and then transported to the spinning box through a bend pipe and a melt distribution pipe .
• Composite spinning: The spinning box is equipped with a special spinning component. The melts of the two polyesters follow their own paths, respectively pass through filters, distribution plates, etc., merge at the spinneret hole, and form a composite filament composed of single fibers, in which COPET is the sea component and PET (or PA6) is the island component. The mass ratio of the composite fiber is generally controlled at about 30:70 .
• Cooling: The composite fiber is cooled and solidified by a spinning window and a side blowing device, making it quickly solidify into amorphous primary fibers. The temperature, humidity and speed of the cooling air are adjusted according to the linear density and spinning speed of the fiber. Generally, the cooling air temperature is 18~22℃, the humidity is 80%, and the speed is 0.4~0.65m/s .
• Stretching: The primary fiber undergoes oiling, guiding, stretching and other processes, which generates orientation stress, and improves its strength and elasticity. The stretching ratio, stretching temperature and stretching speed are adjusted according to the specifications and performance of the fiber. Generally, the stretching ratio is 3~4 times, the stretching temperature is 80~120℃, and the stretching speed is 800~1000m/min .
• Setting: The stretched composite fiber undergoes curling, setting, and other processes, which form regular curling shapes, and eliminate stress, prevent shrinkage and deformation. The setting temperature should be higher than the glass transition temperature of PET (or PA6), generally 115~130℃, and the curling number is generally 1 per/cm .
• Cutting: The set composite fiber undergoes cutting, inspection, packaging, and other processes, and obtains finished staple fibers. The cutting length is adjusted according to the subsequent processing requirements, generally 51mm .

The Advantages of Sea-Island Polyester Slices COPET

Sea-island polyester slices COPET have the following advantages:

• Making ultrafine fibers (0.05DTEX): Sea-island polyester slices COPET can produce fine-denier filament (DTY)/staple fiber with a fineness of less than 0.05D by using sea-island bicomponent composite spinning technology. These products have high specific surface area and softness, suitable for making various high-grade fabrics and non-woven fabrics.
• Excellent dyeing performance: Sea-island polyester slices COPET can be dyed at low temperature and low pressure, with uniform dyeing, high color fastness, and no fading, which can present rich colors and effects.
• Environmentally friendly and recyclable: Sea-island polyester slices COPET are biodegradable bio-based materials, which do not contain harmful substances, and are harmless to the environment and human body. They can also be recycled by physical or chemical methods, reducing resource waste and pollution.

The Applications of Sea-Island Polyester Slices COPET

Sea-island polyester slices COPET are widely used in the following fields:

• Cashmere imitation: Sea-island polyester slices COPET can make cashmere-like fabrics with cashmere-like hand feel, luster and warmth, suitable for making clothing, towels, blankets, etc.
• Peach skin velvet: Sea-island polyester slices COPET can make peach skin-like velvet fabrics with peach skin-like delicacy, softness and breathability, suitable for making clothing, curtains, sofas, etc.
• Deer skin imitation: Sea-island polyester slices COPET can make deer skin-like fabrics with deer skin-like thickness, texture and wear resistance, suitable for making clothing, gloves, boots, etc.
• Spun silk: Sea-island polyester slices COPET can make spun silk fabrics with silk-like smoothness, lightness and moisture absorption and perspiration, suitable for making clothing, underwear, bedding, etc.
• Artificial leather: Sea-island polyester slices COPET can make artificial leather materials with leather-like appearance, hand feel and function, suitable for making clothing, bags, car interiors, etc.

Sea-island polyester slices COPET are a kind of polyester slices with multiple advantages and wide applications, which are your ideal choice. If you want to know more about sea-island polyester slices COPET, please visit our website [here], or contact us by Whatspp +8615623867168. We will serve you wholeheartedly. Thank you!