A shaping method for skin-core composite low-melting-point fiber

Abstract

The invention relates to a chemical fiber setting technology, in particular to a low-melting-point polyester setting technology. Low-temperature thermal shrinkage setting and strong-wind cooling are adopted in a sheath-core composite low-melting-point fiber setting method, wherein the thermal shrinkage temperature ranges from 50 DEG C to 70 DEG C, the thermal shrinkage time ranges from 15 min to 45 min, and fibers are subjected to rapid cooling by a strong-cold fan after leaving a setting area. The surfaces of low-melting-point polyester staple fibers obtained according to the technology are smooth to a certain degree, good in dispersibility, small in specific resistance and stable in thermal shrinkage, and the low-melting-point polyester staple fibers treated by the method can be used at 150-210 DEG C and can be used for producing sound insulation, thermal insulation and waterproof materials such as hard cotton, needle punched non-woven fabric, hot-air bonded nonwoven fabric, silk-like cotton, palm / coconut palm mattresses, shoe materials and the like.

Description

technical field

[0001] The invention relates to a shaping process of chemical fibers, in particular to a shaping process of low-melting point polyester. Background technique

[0002] At present, as a substitute for PP / PE, PE / PET and chemical adhesives, low-melting polyester staple fibers are used in silk-like cotton, thermally bonded non-woven fabrics, hard cotton, palm / coconut palm, hot-air bonded non-woven, Needle-punched non-woven fabrics and shoe materials are widely used. However, due to various reasons such as large investment in production equipment, high technical content, and difficult processing, several domestically produced enterprises are all Taiwan-funded or Sino-Korean joint ventures, and real private enterprises are rarely involved. Although there are several domestic enterprises, the products are still in short supply, and more than 300,000 tons of this fiber still rely on imports every year. The key is that post-processing of low-melting point fibers is r...

Examples

Embodiment Construction

[0022] Below in conjunction with actual production, the setting process of a kind of low-melting point polyester staple fiber of the present invention is described in detail:

[0023] 1) Set the temperature of the relaxation heat setting work area, in order: 60°C, 65°C, 65°C, 58°C, 58°C, 56°C, 56°C, 55°C, 55°C, 50°C, 45°C, 45°C ℃, 40 ℃, start hot water circulation, circulation fan and cooling fan.

[0024] 2) The crimped fibers are conveyed to the pendulum through the belt, and the fibers enter the J-shaped box under the action of the pendulum bucket, and then enter the chain plate of the oven.

[0025] 3) Adjust the operating speed of the relaxation heat setting machine to be between 1.2m / min and 2.0m / min according to the drawing speed, that is, the residence time of the tow in the heat setting machine is 15min to 45min.

[0026] 4) Adjust the air volume of the circulating fan and the dehumidifying fan to meet the requirements of drying and shaping.

[0027] 5) Adjust the a...

technical field

[0001] The invention relates to a shaping process of chemical fibers, in particular to a shaping process of low-melting point polyester. Background technique

[0002] At present, as a substitute for PP / PE, PE / PET and chemical adhesives, low-melting polyester staple fibers are used in silk-like cotton, thermally bonded non-woven fabrics, hard cotton, palm / coconut palm, hot-air bonded non-woven, Needle-punched non-woven fabrics and shoe materials are widely used. However, due to various reasons such as large investment in production equipment, high technical content, and difficult processing, several domestically produced enterprises are all Taiwan-funded or Sino-Korean joint ventures, and real private enterprises are rarely involved. Although there are several domestic enterprises, the products are still in short supply, and more than 300,000 tons of this fiber still rely on imports every year. The key is that post-processing of low-melting point fibers is r...

Examples

Embodiment Construction

[0022] Below in conjunction with actual production, the setting process of a kind of low-melting point polyester staple fiber of the present invention is described in detail:

[0023] 1) Set the temperature of the relaxation heat setting work area, in order: 60°C, 65°C, 65°C, 58°C, 58°C, 56°C, 56°C, 55°C, 55°C, 50°C, 45°C, 45°C ℃, 40 ℃, start hot water circulation, circulation fan and cooling fan.

[0024] 2) The crimped fibers are conveyed to the pendulum through the belt, and the fibers enter the J-shaped box under the action of the pendulum bucket, and then enter the chain plate of the oven.

[0025] 3) Adjust the operating speed of the relaxation heat setting machine to be between 1.2m / min and 2.0m / min according to the drawing speed, that is, the residence time of the tow in the heat setting machine is 15min to 45min.

[0026] 4) Adjust the air volume of the circulating fan and the dehumidifying fan to meet the requirements of drying and shaping.

[0027] 5) Adjust the a...