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Elastic polyurethane thread and manufacturing method thereof

a technology of polyurethane and manufacturing method, which is applied in the direction of monocomponent polyurethane artificial filament, dyeing process, layered products, etc., can solve the problems of yellowing completely solved, the value of the product being greatly reduced, and the inability to say, etc., to achieve excellent stretch ability and deodorant, antibacterial, color fastness properties, and antibacterial effects

Inactive Publication Date: 2014-05-29
TORAY OPELONTEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0026]By means of this invention, it is possible to obtain elastic polyurethane threads with excellent stretch abilities and deodorant, antibacterial, and color fastness properties, since they are elastic polyurethane threads the principal constituent ingredients of which are polymer diols and diisocyanates, they contain metallic phosphates, and the emitted quantities of monoamine compounds with molecular weights of 120 or less are 100 μg / m2 or more. Therefore, fabrics using these elastic polyurethane threads have excellent stretch abilities and deodorant, antibacterial, and color fastness properties.SIMPLE EXPLANATION OF DRAWINGS
[0027]FIG. 1: A schematic view showing the dimensions of various parts the package.WORKING EMBODIMENTS OF THE INVENTION
[0029]First, the polyurethanes used in this invention will be explained.
[0030]The polyurethanes used in this invention may be any ones which have polymer diols and diisocyanates as starting materials; they are not particularly limited. Moreover, the methods of synthesizing them are not particularly limited. That is, they may be polyurethane ureas which consist of polymer diols, diisocyamates, and low-molecular-weight diamines, or polyurethane urethanes which consist of polymer diols, diisocyanates, and low-molecular-weight diols. Moreover, they may also be polyurethane ureas which use compounds containing hydroxyl and amino groups in their molecules as chain extenders. It is also desirable to use polyfunctional glycols or isocyanates, etc., with 3 or more functions, within ranges which do not obstruct the effectiveness of the invention.
[0031]The polymer diols are preferably polyether or polester diols, polycarbonate diols, etc. Moreover, it is especially desirable to use polyether diols from the point of view of giving the threads flexibility and ductility.

Problems solved by technology

However, when inorganic antibacterial agents are added to synthetic resins and molding is performed, the molded articles are discolored by the activities of the metals contained in the agents and the effects of the heat at the time of molding and of light shining on the molded objects; thus, the problem of the value of the products being greatly lowered easily arises.
However, although these technologies have shown certain antibacterial and deodorant performances, it cannot be said that the problem of yellowing has been completely solved, since they are greatly discolored by the environment and the passage of time.
However, since the antibacterial agent hinokitiol has been observed to sublimate due to being heated during dry spinning, it is necessary to put an extra amount of it in the spinning dope.
Moreover, since the amount of residual hinokitiol varies with the amount of heat and other spinning conditions, it is difficult to produce elastic polyurethane thread which maintains a stable antibacterial property.
In addition, there is a problem with cost, since hinokitiol, a natural antibacterial agent, is expensive.
However, they have no deodorant effectiveness if they are used by themselves, and there has been a problem with providing both antibacterial and deodorant properties.

Method used

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  • Elastic polyurethane thread and manufacturing method thereof
  • Elastic polyurethane thread and manufacturing method thereof
  • Elastic polyurethane thread and manufacturing method thereof

Examples

Experimental program
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working examples

[0081]This invention will be explained in more detail by using working examples.

[0082]Strengths, stress relaxation percentages, permanent strain rates, and ductility of the elastic polyurethane thread:

The strengths, stress relaxation percentages, permanent strain rates, and ductility of the elastic polyurethane thread were measured by performing tensile tests with an Instron 4502 tensile tester.

[0083]They are defined below.

[0084]A 5 cm (L1) sample was stretched 300% 5 times at a tensile speed of 50 cm / min. The stress at the 5th time was taken to be (G1). Next, a 300% elongation was held for 30 seconds. The stress after it was held for 30 seconds was taken to be (G2). Next, the length of the sample when the elongation was repeated and the stress became 0 was taken to be (L2). Furthermore, the sample thread was elongated a 6th time until it broke. The stress at the time of the break was taken to be (G3) and the length of the sample thread when it broke was taken to be (L3).

[0085]The p...

working example 1

[0105]PTMG with a molecular weight of 1800 and MDI were reacted for 2 hours at 90° C. in the molar ratio 1:1.58 to produce a prepolymer with isocyanate ends, after which it was dissolved in DMAc at 35 wt % to prepare a prepolymer solution. Moreover, an amine solution was prepared by mixing ethylenediamine and 1,2-propanediamine as chain extenders and diethylamine as a chain terminator (end sequestering agent) in the proportions of 10:2:1 amino end group concentrations and dissolving this mixture in DMAc at 35 wt %. The prepolymer solution and the amine solution were mixed while stirring so that the molar ratio of the isocyanate end groups and amine end groups became 1:1.02, to prepare a DMAC solution (concentration 35 wt %) of a polyurethane urea polymer. Next, as an antioxidant, a polyurethane solution (Dupont Co. “Methacrol”™ 2462) produced by a reaction of t-butyldiethanolamine and methylene-bis(4-cyclohexyl isocyanate) and a condensation polymer of p-cresol and divinylbenzene (D...

working example 2

[0110]The polymer solutions A1, B1, and C1 were uniformly mixed at 97.98 wt %, 2 wt %, and 0.02 wt % to make the spinning dope D2. This was dry-spun in the same manner as in Working Example 1 to make 200 g of a wound polyurethane 22 desitex, 2 filament thread with a zirconium phosphate content of 2 wt %.

[0111]The evaluation results are shown in Tables 3, 4, and 5.

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Abstract

In order to provide an elastic polyurethane thread with excellent antibacterial and deodorant properties as well as excellent color fastness, an elastic polyurethane thread is made which consists of polyurethanes which have polymer diols and diisocyanates as the starting materials, contains metallic phosphates in the range of 0.5-10 wt %, and has an emitted quantity of monoamine compounds with molecular weights of 120 or less of 100 μg / m2 or more.

Description

TECHNOLOGICAL FIELD[0001]This invention concerns an elastic polyurethane thread with excellent antibacterial and deodorant properties as well as excellent color fastness; it concerns an elastic polyurethane thread which is idea for obtaining fabrics with antibacterial and deodorant properties, as well as a method for manufacturing it.BACKGROUND TECHNOLOGY[0002]Because of their stretching ability, elastic fibers are widely used in stretching clothing applications, such as leg-ware, inner-ware, support ware, etc., sanitary applications, such as paper diapers and sanitary napkins, and industrial material applications.[0003]In recent years, in a search for more comfortable living environments, a wide range of so-called “antibacterial products” have appeared, such as antibacterial coatings, films and sheets, filaments, toiletry products, kitchen goods, writing implements, sand, tissues, fibers, cosmetics, etc. Similarly, “deodorant products” have also appeared, such as clothing, sleep-wa...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01F6/70
CPCD01F1/10D01F1/103D01F6/70D01F6/94D06P5/04
Inventor SUZUKI, KATSUYAKANBAYASHI, TATSUAKITANAKA, TOSHIHIRO
Owner TORAY OPELONTEX
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