Preparation method of Kangshu (healthy and confortable) composite staple fiber

Abstract

The invention discloses a preparation method of Kangshu (healthy and confortable) composite staple fiber, comprising the steps: esterification reaction of PTA and EG is carried out; polycondensation reaction of the esterification product is carried out to obtain PET; polyethylene is melted into a PE melt by entering a screw extruder; the PET melt and the PE melt respectively enter a composite spinning manifold and are ejected from a composite hollow spinneret to obtain a hollow skin-core structure yarn; part of PE melt is taken out from the main pipe of the spinning manifold into which the PETmelt enters and a zinc-based ultrafine powder antibacterial agent and a dispersing agent potassium tripolyphosphate supported by zeolite are added to the part of the melt, and after uniformly mixing,the mixture returns to the main pipe; in the stretching process, secondary stretching is performed, and primary stretching is controlled in 1.88-2.14 times; the primary stretching adopts steam bath,and the temperature is controlled at 115 DEC C to 125 DECC. The first stage stretching of the invention is steam stretching. Stretching temperature can be improved to soften the PE, and the surface ofthe produced fiber is smooth with good bonding effect.

Description

technical field

[0001] The invention relates to a preparation method of Kangshu composite short fiber, which belongs to the technical field of textiles. Background technique

[0002] Polyester, especially PET fiber in polyester, is directly spun from synthetic melt, which is a sign of technological progress in this industry. Compared with the method of cooling the melt into solid chips, and then melt spinning by the screw, the energy consumption is greatly reduced. , improve production efficiency, reduce the degradation of macromolecules, and thus greatly improve the product quality of the fiber, especially the uniformity of the physical and mechanical properties of the fiber.

[0003] The skin-core composite short fiber with polyethylene as the skin layer and polyester PET as the core layer can be bonded into non-woven fabrics by hot air, which greatly reduces the manufacturing cost of non-woven fabrics and reduces the impact on the environment during the manufacturing proc...

Examples

Embodiment 1

[0025] A preparation method of Kangshu composite staple fiber, the steps comprising:

[0026] 1) Purified terephthalic acid and ethylene glycol are mixed in proportion and sent to the esterification tank for esterification reaction. The esterification reaction temperature is 255-260 °C;

[0027] 2) The esterification product is sent to the polycondensation kettle through the oligomer pipeline for polycondensation reaction. At the same time, the catalyst is also injected into the oligomer pipeline and sent to the polycondensation kettle to produce PET. The catalyst is HMTS provided by Shanghai Huaming High Technology (Group) Co., Ltd. -PET type titanium series catalyst, the vacuum degree of precondensation reaction is controlled between 2-3KPa absolute pressure, the temperature is controlled at 250-255℃; the vacuum degree of final polymerization reaction is controlled between 0.1-0.2KPa absolute pressure, and the temperature is controlled at 275 -280°C;

[0028] 3) Polyethylen...

Embodiment 2

[0032] A preparation method of Kangshu composite staple fiber, the steps comprising:

[0033] 1) Purified terephthalic acid and ethylene glycol are mixed in proportion and sent to the esterification tank for esterification reaction. The esterification reaction temperature is 255-260 °C;

[0034]2) The esterification product is sent to the polycondensation kettle through the oligomer pipeline for polycondensation reaction. At the same time, the catalyst is also injected into the oligomer pipeline and sent to the polycondensation kettle to produce PET. The catalyst is HMTS provided by Shanghai Huaming High Technology (Group) Co., Ltd. -PET type titanium series catalyst, the vacuum degree of precondensation reaction is controlled between 2-3KPa absolute pressure, the temperature is controlled at 250-255℃; the vacuum degree of final polymerization reaction is controlled between 0.1-0.2KPa absolute pressure, and the temperature is controlled at 275 -280°C;

[0035] 3) Polyethylene...

Embodiment 3

[0039] A preparation method of Kangshu composite staple fiber, the steps comprising:

[0040] 1) Purified terephthalic acid and ethylene glycol are mixed in proportion and sent to the esterification tank for esterification reaction. The esterification reaction temperature is 255-260 °C;

[0041] 2) The esterification product is sent to the polycondensation kettle through the oligomer pipeline for polycondensation reaction. At the same time, the catalyst is also injected into the oligomer pipeline and sent to the polycondensation kettle to produce PET. The catalyst is HMTS provided by Shanghai Huaming High Technology (Group) Co., Ltd. -PET type titanium series catalyst, the vacuum degree of precondensation reaction is controlled between 2-3KPa absolute pressure, the temperature is controlled at 250-255℃; the vacuum degree of final polymerization reaction is controlled between 0.1-0.2KPa absolute pressure, and the temperature is controlled at 275 -280°C;

[0042] 3) Polyethylen...

technical field

[0001] The invention relates to a preparation method of Kangshu composite short fiber, which belongs to the technical field of textiles. Background technique

[0002] Polyester, especially PET fiber in polyester, is directly spun from synthetic melt, which is a sign of technological progress in this industry. Compared with the method of cooling the melt into solid chips, and then melt spinning by the screw, the energy consumption is greatly reduced. , improve production efficiency, reduce the degradation of macromolecules, and thus greatly improve the product quality of the fiber, especially the uniformity of the physical and mechanical properties of the fiber.

[0003] The skin-core composite short fiber with polyethylene as the skin layer and polyester PET as the core layer can be bonded into non-woven fabrics by hot air, which greatly reduces the manufacturing cost of non-woven fabrics and reduces the impact on the environment during the manufacturing proc...

Examples

Embodiment 1

[0025] A preparation method of Kangshu composite staple fiber, the steps comprising:

[0026] 1) Purified terephthalic acid and ethylene glycol are mixed in proportion and sent to the esterification tank for esterification reaction. The esterification reaction temperature is 255-260 °C;

[0027] 2) The esterification product is sent to the polycondensation kettle through the oligomer pipeline for polycondensation reaction. At the same time, the catalyst is also injected into the oligomer pipeline and sent to the polycondensation kettle to produce PET. The catalyst is HMTS provided by Shanghai Huaming High Technology (Group) Co., Ltd. -PET type titanium series catalyst, the vacuum degree of precondensation reaction is controlled between 2-3KPa absolute pressure, the temperature is controlled at 250-255℃; the vacuum degree of final polymerization reaction is controlled between 0.1-0.2KPa absolute pressure, and the temperature is controlled at 275 -280°C;

[0028] 3) Polyethylen...

Embodiment 2

[0032] A preparation method of Kangshu composite staple fiber, the steps comprising:

[0033] 1) Purified terephthalic acid and ethylene glycol are mixed in proportion and sent to the esterification tank for esterification reaction. The esterification reaction temperature is 255-260 °C;

[0034]2) The esterification product is sent to the polycondensation kettle through the oligomer pipeline for polycondensation reaction. At the same time, the catalyst is also injected into the oligomer pipeline and sent to the polycondensation kettle to produce PET. The catalyst is HMTS provided by Shanghai Huaming High Technology (Group) Co., Ltd. -PET type titanium series catalyst, the vacuum degree of precondensation reaction is controlled between 2-3KPa absolute pressure, the temperature is controlled at 250-255℃; the vacuum degree of final polymerization reaction is controlled between 0.1-0.2KPa absolute pressure, and the temperature is controlled at 275 -280°C;

[0035] 3) Polyethylene...

Embodiment 3

[0039] A preparation method of Kangshu composite staple fiber, the steps comprising:

[0040] 1) Purified terephthalic acid and ethylene glycol are mixed in proportion and sent to the esterification tank for esterification reaction. The esterification reaction temperature is 255-260 °C;

[0041] 2) The esterification product is sent to the polycondensation kettle through the oligomer pipeline for polycondensation reaction. At the same time, the catalyst is also injected into the oligomer pipeline and sent to the polycondensation kettle to produce PET. The catalyst is HMTS provided by Shanghai Huaming High Technology (Group) Co., Ltd. -PET type titanium series catalyst, the vacuum degree of precondensation reaction is controlled between 2-3KPa absolute pressure, the temperature is controlled at 250-255℃; the vacuum degree of final polymerization reaction is controlled between 0.1-0.2KPa absolute pressure, and the temperature is controlled at 275 -280°C;

[0042] 3) Polyethylen...

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