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Thermoplastic polyurethane fiber and method for producing the same

A technology of thermoplastic polyurethane and its production method, which is applied in the field of thermoplastic polyurethane fiber, can solve the problems of reducing thermoplastic polyurethane fiber, not being able to balance heat shrinkability and recyclability, and reducing the recyclability of thermoplastic polyurethane materials, etc., achieving low heat shrinkage rate, good The effect of recyclability

Active Publication Date: 2021-08-06
SAN FANG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Although the use of cross-linking agent can help reduce the heat shrinkage of thermoplastic polyurethane fibers, as the application becomes more diverse, the heat shrinkage requirements become more stringent. Therefore, the benefit of the crosslinking agent on the heat shrinkage of thermoplastic polyurethane fibers is not enough.
In addition, the recyclability of thermoplastic polyurethane materials produced by crosslinking agents is also greatly reduced
[0005] In view of this, there is an urgent need to provide a thermoplastic polyurethane fiber and its production method to improve the existing thermoplastic polyurethane fiber can not take into account the defects of heat shrinkability and recyclability

Method used

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  • Thermoplastic polyurethane fiber and method for producing the same
  • Thermoplastic polyurethane fiber and method for producing the same
  • Thermoplastic polyurethane fiber and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The thermoplastic polyurethane fiber of Example 1 is made of thermoplastic polyurethane elastomer (Shore D is 65D, and the melting point measured by DSC is 179.6° C.) produced by BASF. Then, the thermoplastic polyurethane elastomer system was placed in a drying barrel and dried at 80°C. After 6 hours, the moisture content of the thermoplastic polyurethane elastomer is less than 100ppm.

[0067] Next, the monofilament material of Example 1 was produced by a drawing system suitable for the monofilament material. Among them, the area from the feed inlet to the extrusion outlet of the melt spinning machine is divided into five sections, and the temperatures are respectively set at 180°C, 190°C, 200°C, 205°C and 205°C. The temperature of the cooling water tank was set to 25°C.

[0068] Then, the cooled monofilament material was subjected to a first drawing step, wherein the temperature of the hot water bath was 80° C., and the drawing ratio of the first drawing step was 4....

Embodiment 2

[0071] The thermoplastic polyurethane fiber of Example 2 is made by using thermoplastic polyurethane elastomer (Shore D is 65D, and the melting point measured by DSC is 179.6° C.) produced by BASF. Then, the thermoplastic polyurethane elastomer system was placed in a drying barrel and dried at 80°C. After 6 hours, the moisture content of the thermoplastic polyurethane elastomer is less than 100ppm.

[0072] Next, the monofilament material of Example 2 was produced by a drawing system suitable for the monofilament material. Among them, the area from the feed inlet to the extrusion outlet of the melt spinning machine is divided into five sections, and the temperatures are respectively set at 180°C, 190°C, 200°C, 205°C and 205°C. The temperature of the cooling water tank was set to 25°C.

[0073] Then, the cooled monofilament material was subjected to a first drawing step, wherein the temperature of the hot water bath was 80° C., and the drawing ratio of the first drawing step ...

Embodiment 3

[0075] Embodiment 3, comparative example 1 and comparative example 2

[0076]Embodiment 3, comparative example 1 and comparative example 2 use the same preparation method and evaluation method as the preparation method of the thermoplastic polyurethane fiber of embodiment 2, and the difference is that embodiment 3, comparative example 1 and comparative example 2 use different The raw materials or stretching parameters are used to make thermoplastic polyurethane fibers. The formula and evaluation results are shown in Table 1, and will not be described here.

[0077] Table 1

[0078]

[0079]

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Abstract

The present invention relates to a thermoplastic polyurethane fiber and a method for producing the same. A thermoplastic polyurethane material is firstly provided and subjected to a molten extruding process to form a fiber material. Next, an extension process is performed to the fiber material to obtain the thermoplastic polyurethane fiber of the present invention. The thermoplastic polyurethane fiber has a lower thermal shrinking property, thereby meeting requirements of the application.

Description

technical field [0001] The present invention relates to a thermoplastic polyurethane fiber, in particular to provide a thermoplastic polyurethane fiber with low thermal shrinkage rate and its preparation method. Background technique [0002] Because thermoplastic polyurethane (TPU) elastomers have good recyclability, processability and excellent mechanical properties, thermoplastic polyurethane elastomers have been widely used. In addition, thermoplastic polyurethane elastomers have good dyeability, so thermoplastic polyurethane elastomers are also used to make fiber materials. [0003] Generally speaking, in order to make thermoplastic polyurethane fibers, thermoplastic polyurethane elastomers must be further cross-linked to improve their mechanical properties and meet the requirements of fabrics. When the cross-linking reaction is carried out without adding a cross-linking agent, the formed thermoplastic polyurethane fiber has high temperature sensitivity, and is easy to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/12D01D5/16D01F6/70
CPCD01D5/08D01D5/12D01D5/16D01F6/70C08L75/04B29C48/05B29C48/355B29C48/92B29C48/919B29C48/0018B29C48/022B29C2948/92704B29K2075/00B29C48/35C08G18/3831
Inventor 林至逸郑国光杨高隆康博评
Owner SAN FANG CHEM IND
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