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Production for of melting point polyester short staple

A technology of low melting point polyester and production method, applied in the direction of short fiber formation, single-component polyester rayon, etc., can solve the problems of hard hand feeling, limited application field, difficult to dye, etc.

Inactive Publication Date: 2005-07-27
中国石化集团天津石油化工公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low melting point of the fiber (such as polyethylene), poor dry cleaning resistance, and insufficient bonding with other fibers, its application fields are limited, and most polyolefins are used to make non-recycled products
[0004] Polypropylene fiber has become the main raw material of hot-rolled nonwovens due to its low cost, light weight, high strength, corrosion resistance, and wear resistance. stiff, not very popular

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] According to raw material drying, pre-spinning part and post-spinning part respectively:

[0011] (1) slice drying part:

[0012] Low-melting polyester chips with a melting point of 120-130°C need to be dried in a vacuum drum at a drying temperature of 60-65°C for 24 hours and a vacuum degree of -0.1Mpa.

[0013] (2) Pre-spinning part:

[0014] 1. The pre-crystallizer temperature of the drying system is 70°C, the temperature of the filling dryer is 30°C, and the fan is turned on to circulate.

[0015] 2. The spinneret is made of 1453 (0.3*0.6), the assembly is filled with 800 grams of sea sand, the preheating temperature is 250°C, and the time is 20 hours. The pump supply rate is 1010g / min, the spinning speed is 970m / min, and the surrounding air is 24°C and 480Pa.

[0016] 3. The temperature of each zone of the screw: the first zone is 195°C, the second zone is 235°C, the third zone is 250°C, the fourth zone is 275°C, the fifth zone is 275°C, the head is 265°C, and t...

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Abstract

A process for preparing the polyster staple fibres with low fusing point (120-130 deg.C) includes such steps as low-temp vacuum drying of polyester chips, fusing, spinning, winding, bundling, drafting three times, hot tension-setting curling, hot shrink-setting, cutting and opening.

Description

technical field [0001] The invention relates to a production method of low-melting-point polyester staple fiber, in particular to a production method of low-melting-point polyester staple fiber with a melting point of 120-130°C. Background technique [0002] The emergence of low-melting fiber (also known as thermal bonding and fiber) provides a convenient method for the production of nonwovens. The method of bonding nonwovens with thermal bonding fibers replaces environmentally unfriendly water-based adhesives. Thermally bonded fiber bonded nonwovens are inexpensive to produce and provide a means of making articles with unique or superior properties. [0003] Polyolefins have been widely used as thermal bonding fibers for nonwovens due to their low melting point. Due to the low melting point of the fiber (such as polyethylene), poor dry cleaning resistance, and insufficient bonding with other fibers, its application fields are limited, and most polyolefins are used to make ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/26D01F6/62
Inventor 曾新王明春杨瑞玲杨昕马欣吕明源
Owner 中国石化集团天津石油化工公司
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