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Polyurethane elastic fiber and wound body thereof

A polyurethane elastic and fiber technology, applied in the direction of single-component polyurethane artificial filament, fiber type, fiber treatment, etc., can solve the problems of small tension change, not easy to loose hair, broken ends, etc., to achieve small tension change, not easy to loose hair, The effect of suppressing decapitation

Active Publication Date: 2020-07-17
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the case of processing polyurethane elastic fibers of multifilament yarns, there are problems such as loosening of single filaments during travel, entanglement of filaments on guides due to tension fluctuations, or dyeing process when processing into fabrics, In the heat setting process, the process of applying a high-temperature adhesive in the manufacture of diapers, etc., the single yarn is cut due to heat, and the yarn is easily broken.
[0005] In order to solve the broken ends during processing, a large number of improved technologies have been proposed, but it is difficult to manufacture polyurethane elastic fibers that are not easy to loose the monofilament, have small tension changes during running, and are not easily cut under thermal conditions. It cannot be said that the inhibitory effect of decapitation is sufficient
[0006] For example, for the polyurethane elastic fiber described in the following Patent Document 1, adjusting the strength of false twist and bonding the monofilaments can make it difficult to loosen the monofilaments. insufficient
[0007] In addition, in the polyurethane elastic fiber described in the following patent document 2, by reducing the molecular weight of a part of the polyurethane polymer, it is possible to make it difficult to loose the monofilament, but there is a problem that the melting point of the polymer is also lowered, so the resistance The thermal property is not good, and it is easy to cause the end breakage caused by the heat during processing

Method used

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  • Polyurethane elastic fiber and wound body thereof
  • Polyurethane elastic fiber and wound body thereof
  • Polyurethane elastic fiber and wound body thereof

Examples

Experimental program
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Effect test

Embodiment 1～8

[0214] Diethylene glycol dibenzoate (manufactured by Tokyo Chemical Industry Co., Ltd.: there is an aromatic ring in the compound) is contained in the oil agent or in the polymer so that the total weight of the polyurethane elastic fiber becomes 200ppm, and the diameter of the single filament is The ratio of the maximum value to the minimum value is 1.47 to 1.53, and the outflow initiation temperature is above 200°C. Under the condition that no urethane or urea compound containing tertiary amine is contained, the elongation is 2%, as follows The polyurethane elastic yarn wound bodies of Examples 1 to 8 were produced by changing the yarn fineness and the number of filaments as shown in Table 1. The results are shown in Table 1 below.

Embodiment 9～15

[0216] The yarn fineness is 620dtex, the number of filaments is 72, the ratio of the maximum value to the minimum value of the single filament diameter is 1.48 to 1.56, and the elongation is 2%, and the oil agent or polymer is changed as shown in the following Table 1. The content ratio of diethylene glycol dibenzoate (manufactured by Tokyo Chemical Industry Co., Ltd.: there is an aromatic ring in the compound) contained in the polyurethane elastic fiber relative to the total weight of the polyurethane elastic fiber and the outflow start temperature, when the amino group containing the tertiary amine is not contained The polyurethane elastic yarn wound bodies of Examples 9 to 15 were produced under the condition of formate ester or urea compound containing tertiary amine.

[0217] It was found that the polyester elastic fiber contained the ester or the phosphoric acid ester, thereby suppressing the breakage during processing. The results are shown in Table 1 below.

[0218] [...

Embodiment 16～21

[0221] The yarn fineness is 620dtex, the number of filaments is 72, and the oil agent contains ester or phosphoric acid ester so that the total weight of the polyurethane elastic fiber is 200ppm, and the ratio of the maximum value to the minimum value of the monofilament diameter is 1.46 to 1.53 , The outflow initiation temperature is 200°C or higher, under the condition that no urethane containing tertiary amine or urea compound containing tertiary amine is contained, the elongation is 2%, and the ester is changed as shown in Table 2 below. or phosphoric acid ester to manufacture the polyurethane elastic yarn wound bodies of Examples 16-21. As the ester or phosphoric acid ester, methyl benzoate (manufactured by Tokyo Chemical Industry Co., Ltd.: an aromatic ring is present in the compound), benzyl benzoate (manufactured by Tokyo Chemical Industry Co., Ltd.: an aromatic ring is present in the compound), trimellitic acid tris Methyl ester (manufactured by Tokyo Chemical Industr...

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Abstract

Provided is a polyurethane elastic fiber that is a multifilament yarn, the polyurethane elastic fiber being characterized in that the content of an ester or a phosphoric acid ester that is a product of the condensation of a compound A with a compound B is 50 ppm or more and 5% or less relative to the weight of the polyurethane elastic fiber, the compound A is at least one compound selected from amonocarboxylic acid having 4 to 30 carbon atoms inclusive, a dicarboxylic acid having 4 to 30 carbon atoms inclusive, a tricarboxylic acid having 4 to 30 carbon atoms inclusive and phosphoric acid, and the compound B is at least one compound selected from a monol having 1 to 30 carbon atoms inclusive, a diol having a molecular weight of 3000 or less and a triol having a molecular weight of 3000 orless.

Description

technical field [0001] The present invention relates to polyurethane elastic fiber and its wound body. Background technique [0002] Polyurethane elastic fibers have excellent elastic properties, so they are used in various products requiring stretchability and fit, such as inner liners, stockings, compression garments, and diapers. The processing speed of polyurethane elastic fibers in the manufacture of these products is increasing year by year, and there is a strong desire for polyurethane elastic fibers and their wound bodies to be processed without interruption. [0003] In addition, the polyurethane elastic fiber has an appropriate fineness depending on the application, and is often produced as a multifilament yarn in which a plurality of filaments are bundled according to the fineness. [0004] However, in the case of processing polyurethane elastic fibers of multifilament yarns, there are problems such as loosening of single filaments during travel, entanglement of ...

Claims

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Application Information

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IPC IPC(8): D01F6/94D06M13/224D06M13/292D06M13/402D06M101/38
CPCD06M13/224D06M13/292D01F6/70D01F1/10D06M13/2246D06M13/295D06M2200/40D06M2101/38
Inventor 后藤英之佐藤均山本太郎
Owner ASAHI KASEI KK
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