JPS642707B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for manufacturing anti-mildew treated polyurethane fibers, and its purpose is to use a small amount of anti-mildew agent and to have a durable anti-mildew property without coloring or deterioration of physical properties through simple heat treatment. The purpose is to obtain polyurethane fibers. Since polyurethane fibers have unique elastic properties compared to all other fibers, they have been used in a variety of product fields by being mixed or woven with other synthetic fibers or natural fibers. Polyurethane fibers currently available on the market can be roughly divided into two types: those made of polyether and those made of polyester, which have a chemical composition that controls their elasticity. Compared to polyether-based polyurethane fibers, this polyester-based polyurethane fiber has a wider selection of constituent components and is easier to design with its elastic function. In addition, it has excellent resistance to chlorine embrittlement and oxidative deterioration, so it can be used for certain product fields of polyurethane fibers, but it can be used against certain types of microorganisms such as mold, bacteria, and bacteria that exist in living spaces. It has the disadvantage of being easily embrittled. Although the microorganisms that cause this polyester-based polyurethane to become brittle are specific species that exist in nature, the fact that they are present in living spaces where these fibers are generally used means that the brittleness phenomenon can actually be reproduced. You can check from Polyurethane fibers that have become brittle due to these microorganisms no longer have any elastic function and lose their commercial value. In order to improve these defects, it is generally necessary to add a bactericidal substance called a fungicide to polyurethane fibers.
Generally speaking, there are many things that should be taken into account when it comes to antifungal agents from the standpoint of safety and health, and this is an issue that must be taken into consideration particularly when it comes to polyurethane fibers, which are often used in underwear and the like. In particular, organometallic antifungal agents have this tendency and must be avoided. In addition, polyurethane fibers in particular are generally susceptible to yellowing and becoming brittle when treated with chemicals, and from this point of view as well, it has been difficult to adopt the concept of adding a fungicide. In view of the current situation, the present inventors have attempted to improve these drawbacks and prevent textile products made from polyester-based polyurethane fibers from becoming brittle even after repeated washing after being handed over to an unspecified number of consumers. As a result of extensive research into a method for producing polyurethane fibers that does not pose any danger, the present invention has been completed. That is, the present invention resides in a method for producing mold-proofed polyurethane fibers, which comprises applying a mold-proofing agent to polyurethane fibers as an aqueous dispersion containing no organic solvent, and then heat-treating the polyurethane fibers. The present inventors have developed a polyester polyurethane fiber with an inorganic/organic balance of 1.0 or less, a melting point or decomposition point, and a molecular weight of the following formulas (1), (2),
(3) and (4) at the same time 7m＋9M≧3150 −(1), 5m＋6M≦3600 −(2), m≧5 −(3), M≧100 −(4) Apply a satisfying fungicide and heat treat By doing so, they discovered that it is possible to impart mold-proofing properties with extremely high wash resistance. (In the formula, m represents the melting point or decomposition point (°C), and M represents the molecular weight.) Hereinafter, the present invention will be explained in more detail. The polyester diol used in the production of the polyurethane fiber of the present invention is ethylene glycol,
Those obtained by condensation polymerization of one or more diols such as 1,4-butanediol, 1,2-propanediol, and neopentylene glycol and dicarboxylic acids such as adipic acid, and ε- These include those obtained by ring-opening polymerization of caprolactam, and these may be used alone or in combination. In many embodiments, these polyurethane fibers are twisted, knitted, or woven with synthetic fibers such as acrylic, polyamide, and polyester fibers, regenerated cellulose fibers, or natural fibers such as wool and cotton. The antifungal agent in the present invention is an agent that suppresses or kills the growth and reproduction of mold, and includes organic mercury compounds, phenols and their chlorine compounds, metal salts of organic acids such as naphthenic acid, and quaternary ammonium. There are compounds, etc. The inorganic/organic balance in the present invention refers to the surfactant HLB (Hydrophile-Lypophile).
Fujita [Chemistry, Vol. 11, p. 721, 1957]
[Nankodo], and serves as an indicator of the solubility, melting point, other physical properties, physiological effects, etc. of organic compounds. According to this concept, the overall properties of an organic compound can be expressed as shown in the following formula.

[Table] All molecules All molecules All molecules 〓

Claims (1)

[Scope of Claims] 1. A method for producing anti-mildew-treated polyurethane fibers, which comprises applying an anti-mildew agent to polyurethane fibers as an aqueous dispersion containing no organic solvent, and then heat-treating the fibers. 2. The manufacturing method according to claim 1, wherein the constituent component of the polyurethane is polyester. 3 The inorganic/organic balance of the fungicide is 1.0 or less, and the melting point or decomposition point and molecular weight are as follows:
The manufacturing method according to claim 1, characterized in that (1), (2), (3) and (4) are simultaneously satisfied. 7m+9M≧3150 (1) 5m+6M≦3600 (2) m≧5 (3) M≧100 (4) In the formula, m represents the melting point or decomposition point (°C), and M represents the molecular weight.