JP2716695B2 - Blended yarn for clothing with humidity control function - Google Patents

Description

The present invention relates to a comfortable textile material for clothing. More particularly, it relates to a blend yarn for a clothing material having a humidity control function. [Conventional technology and problems] Synthetic fibers have come to be widely used because of their many excellent properties. Most of the basic clothing used is made of natural fibers. This is probably because synthetic fibers are remarkably inferior in water absorption and hygroscopicity. Many methods have conventionally been proposed for imparting water absorbency and hygroscopicity to synthetic fibers (JP-A-54-93121, JP-A-60-155770, etc.). Cannot be exceeded. In particular, an improvement having a capacity higher than that of the natural fiber in the hygroscopic property has not been put to practical use because the physical properties of the fiber are significantly reduced. In terms of the natural fiber, silk is the best in terms of the humidity control function, but it is only practically used in a very limited range in view of the difficulty in handling and economics. Used. [Object of the Invention] As a result of pursuing changes in humidity in clothes, the present inventor has found that, when fibers having large hygroscopicity are dried to a state as close to absolutely dry as possible and provided for wearing, the rise in humidity in clothes is slow, and Found that they can feel the time with less stuffiness longer. On the other hand, it was observed that when the fiber whose moisture absorption was increased by the modification was used, the physical properties of the fiber were remarkably reduced, which was not suitable for practical use. Therefore, as a result of intensive research on ways to improve these disadvantages and take advantage of the good hygroscopicity, firstly, when examining carboxymethylated rayon and polyvinyl alcohol fiber with strong hygroscopicity, they shrink due to water absorption and become hard after drying. Or, the strength is remarkably reduced, and in order to compensate for this drawback, when blended or blended with non-hygroscopic fibers such as polyester, polypropylene, and polyvinyl chloride, the ratio of the non-hygroscopic fibers is 50% by weight or more, preferably Was found to be greatly improved by mixing at a ratio of 55 to 65% by weight to maintain the humidity control function. As a matter of course, the limit of improvement in hygroscopicity is that the fiber is not dissolved in water, and the degree of substitution during fiber modification and the degree of polymerization of the base fiber are greatly affected. In order to control the solubility, it is also possible to take measures for adjustment by crosslinking or the like. In this way, carboxymethylated rayon, which is not practically used alone from the fiber physical properties, by knitting fibers such as polyvinyl alcohol fibers, etc., through a known process, a knitted fabric and a comfortable garment that does not feel stuffy when used for clothing. It was found that it could be obtained. The present invention has been completed as a result of further research based on such findings. [Constitution of the Invention] That is, the present invention relates to a blended yarn comprising at least two or more fibers, wherein one or two or more non-hygroscopic fibers selected from polyester, polypropylene and polyvinyl chloride are contained in an amount of 50 to 80% by weight. And 20 to 50% by weight of a hygroscopic fiber selected from carboxymethylated rayon or polyvinyl alcohol fiber, and the equilibrium moisture absorption at a temperature of 20 ° C and an environmental relative humidity of 65% is 15% or less based on the absolute dry weight,
The present invention relates to a blended yarn for clothing having a humidity control function, wherein the equilibrium moisture absorption at a temperature of 29.5 ° C. and an environmental relative humidity of 96% is 35% or more based on the absolute dry weight. The blended yarn in the present invention includes a yarn composed of a filament fiber and a staple fiber. The hygroscopic fiber used in the present invention has a temperature of 29.5 ° C.
It is preferable that the equilibrium moisture absorption at an environmental relative humidity of 96% is 70% or more based on the absolute dry weight, and specific examples thereof include carboxymethylated rayon and polyvinyl alcohol fiber. The preferable degree of carboxymethylation of the cellulosic fiber varies depending on the degree of polymerization of the cellulose. For example, in the case of viscose rayon, about 0.15 to 0.18 is the best.
0 if the molecular weight is large, such as polynosic rayon.
About 19-0.22 is best. If the degree of substitution is higher than this, it becomes easy to dissolve. Dissolution can be suppressed by post-crosslinking, and aluminum ions can be used as the simplest method. However, when the carboxymethylated rayon fiber obtained by any of the methods alone is wetted with water and dried, the fiber becomes hard as if the fiber has been peeled off, and the tensile strength is reduced. It has drawbacks such as shrinkage and lack of dimensional stability when made into clothing. The same applies to other examples, and in the case of polyvinyl alcohol fiber, the degree of saponification varies depending on the average degree of polymerization,
In order to obtain a desired moisture absorption, the saponification degree is preferably 98 mol% or more.
This fiber alone is hard and has a reduced strength similarly to the carboxymethylated rayon fiber. The non-hygroscopic fiber used in the present invention has a temperature of 20 ° C.
It is preferable that the equilibrium moisture absorption at an environmental relative humidity of 65% is 5% or less based on the absolute dry weight, and specifically, commercially available polyester, polypropylene and polyvinyl chloride are mentioned. The fibers may be those obtained by physically changing or chemically modified, that is, fibers having fine flocculent grooves or fine pores. Those having been modified in terms of hygroscopicity generally have low strength and high affinity with hygroscopic fibers, and thus have a drawback that they become harder by drying after absorbing water. In the present invention, the strength of the non-hygroscopic fiber needs to have a certain size in order to compensate for the brittleness of the hygroscopic fiber. In terms of tensile strength, it is preferably at least 5.0 g / D per denier in a dry state.
The fineness should be as thin as possible and 3 denier or less, because it is used in contact with the skin. Preferably, 0.8 to 1.5 denier is good. The blended yarn of the present invention contains 50 to 80% by weight of a non-hygroscopic fiber and 20 to 50% by weight of a hygroscopic fiber, and has an equilibrium moisture absorption at a temperature of 20 ° C. and an environmental relative humidity of 65% relative to the absolute dry weight. %, And the equilibrium moisture absorption at a temperature of 29.5 ° C and an environmental relative humidity of 96% is 35% or more based on the absolute dry weight. In particular, those having a non-hygroscopic fiber content ratio of 55 to 65% by weight are preferred. The cotton blending of the hygroscopic fiber and the non-hygroscopic fiber can be carried out by a usual method.
The fineness of the fiber should be as small as possible, the yarn should be fine, and the strength should be increased by increasing the number of twists. Further, it is more desirable that the non-hygroscopic fiber is a spun yarn having a core-sheath structure so that the non-hygroscopic fiber comes to the outside as viewed in the yarn cross section. When the hygroscopic fiber is a long fiber, a core-sheath structure in which a non-hygroscopic fiber is wound in a sheath shape by a known method is particularly desirable (see JP-A-52-59745). The method for producing the target yarn includes a method in which a hygroscopic fiber and a non-hygroscopic fiber are prepared in advance and spinning is performed by a known method, and a method in which a hygroscopic fiber base fiber and a non-hygroscopic fiber having a predetermined blending ratio are mixed. There is a method in which a yarn is wound around a cheese cone and modified into a hygroscopic fiber. Which method is adopted is case-by-case, but when the moisture absorption is increased, it becomes difficult to pass through the conventional device from the viewpoint of fiber physical properties. Alternatively, a desired product may be obtained by a modification reaction after forming a mixed fiber. In the blended yarn according to the present invention, the friction during the subsequent steps increases due to the change in the hardness and surface physical properties of the fiber. This disadvantage can be solved by selecting a process oil. When a garment such as a sock or an undergarment is made using the blended yarn obtained by the above method, a comfortable product with less stuffiness can be obtained. [Effects of the Invention] As described above, the blended yarn of the present invention has a low relative humidity condition (for example, a temperature of 20 ° C and a relative humidity of 65%) in its constituent components.
%) And contains a large amount of moisture under relatively high relative humidity conditions (for example, temperature of 29.5 ° C and relative humidity of 96%). In addition, it has a function of alleviating a rise in the humidity of the environment inside the clothes, and further, it can release moisture due to a decrease in the vapor pressure due to the airflow in the outside world and a decrease in the temperature, thereby mitigating changes in the temperature and humidity of the environment inside the clothes. Due to this function, it is possible to obtain a basic garment such as underwear with less sensation of heat and less hot feeling by using the blended yarn of the present invention. In addition, in a normal state, even after drying after washing and changes in the environment during storage of clothes, moisture is well released, and inconvenience during storage due to moisture absorption hardly occurs. [Examples] Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples. The percentages during the execution indicate weight percentages. Example 1 Polyester fiber Fineness 2 denier 80% Viscose rayon Monodenic acetic acid having a mole number of 3 times the intended carboxymethylation degree per 1 mole of cellulose was mixed with a blended yarn having a fineness of 1.5 denier 20%.
Add 2.2 times that amount of sodium hydroxide, perform mercerization at room temperature for 30 minutes, then perform carboxymethylation at 60 ° C for 120 minutes, neutralize excess sodium hydroxide with acetic acid, wash with water, and perform oil treatment. After that, hot air drying was performed for 60 minutes to obtain a modified yarn. The degree of carboxymethylation was 0.2. The fiber composition ratio after the reaction varied as shown in Table 1. Example 2 Polyester Fiber Fineness 2 Denier 65% Viscose Rayon A blended yarn having a fineness of 1.5 denier 35% was carboxymethylated in the same manner as in Example 1. The degree of carboxymethylation was 0.13. The fiber composition ratio after the reaction varied as shown in Table 1. Example 3 Polyvinyl chloride fiber Fineness 2 denier 65% Viscose rayon A blend yarn having a fineness 1.5 denier 35% was carboxymethylated in the same manner as in Example 1. The degree of carboxymethylation was 0.13. Example 4 Polyester Fiber Fineness 2 Denier 55% Viscose Rayon A blended yarn having a fineness 1.5 denier 45% was carboxymethylated in the same manner as in Example 1. The degree of carboxymethylation was 0.09. The fiber composition ratio after the reaction varied as shown in Table 1. Comparative Example 1 Polyester Fiber Fineness 2 Denier 50% Viscose Rayon A blended yarn having a fineness 1.5 denier 50% was carboxymethylated in the same manner as in Example 1. The degree of carboxymethylation was 0.09. The fiber composition ratio after the reaction varied as shown in Table 1. Comparative Example 2 Polyester Fiber Fineness 2 Denier 65% Viscose Rayon A blended yarn with a fineness of 1.5 denier 35%. Example 5 Polyvinyl alcohol fiber (degree of polymerization: 1700, degree of saponification: 99.0%) Fineness: 2 denier 20% Polyester fiber Fineness: 2 denier 80% The above two types of fibers were mixed to form a spun yarn. Example 6 Polyvinyl alcohol fiber (degree of polymerization: 1700, degree of saponification: 99.9%) Fineness: 1.5 denier 35% Polyester fiber: fineness: 2 denier 65% The above two kinds of fibers were mixed to form a spun yarn. Example 7 Polyvinyl alcohol fiber (degree of polymerization: 2,000, degree of saponification: 99.9%) Fineness: 2 denier 45% Polyester fiber: fineness: 2 denier 55% The above two types of fibers were mixed to form a spun yarn. Example 8 Polyvinyl alcohol fiber (degree of polymerization: 1700, degree of saponification: 99.9%) Fineness: 1.5 denier 30% Polypropylene fiber: fineness: 2 denier 70% The above two kinds of fibers were mixed to form a spun yarn. Comparative Example 3 Polyvinyl alcohol fiber (degree of polymerization: 2,000, degree of saponification: 99.9%) Fineness: 2 denier 55% Polyester fiber Fineness: 2 denier 45% The above two types of fibers were mixed to form a spun yarn. Comparative Example 4 Polyvinyl alcohol fiber (degree of polymerization: 1700, degree of saponification: 99.0%) Fineness: 2 denier 15% Polyester fiber: fineness: 2 denier 85% The above two kinds of fibers were mixed to form a spun yarn. Strength of the yarn obtained in Examples 1 to 8 and proportional examples 1 to 4,
The moisture absorption, the moisture absorption of the hygroscopic fiber, and the hardness during drying were evaluated, and the results are shown in Table 1. Table 1 also shows the evaluation results of cotton, wool, and silk as reference examples. The moisture absorption was determined by the following equation from the dry weight of the sample and the weight at a predetermined temperature and relative humidity. Moisture absorption A; Equilibrium moisture absorption at a temperature of 20 ° C and a relative humidity of 65%. Moisture absorption B; Equilibrium moisture absorption at 29.5 ° C and 96% relative humidity Example 9 Polyester fiber Fineness 2 denier 65% Viscose rayon 1.5 denier 35% fineness was carboxymethylated in the same manner as in Example 1 to obtain a 40S blended yarn having a carboxymethylation degree of 0.14. Two of these were aligned and a sock was knitted with 20% operon fiber manufactured by Dupont Toray. As a comparative example, socks were similarly knitted with two 40S cotton 80% operons. From mid-June to mid-July, 30 male panelists conducted a wearing test for one month. The results are shown below.

Claims (1)

(57) [Claims] In a blended yarn comprising at least two or more fibers, one or two or more non-hygroscopic fibers selected from polyester, polypropylene and polyvinyl chloride are mixed with 50 to 50%.
80% by weight, and 20 to 50% by weight of hygroscopic fiber selected from carboxymethylated rayon or polyvinyl alcohol fiber. Equilibrium moisture absorption at a temperature of 20 ° C and a relative humidity of 65% is 15% or less based on the absolute dry weight. The equilibrium moisture absorption at a temperature of 29.5 ° C and a relative humidity of 96% is based on the absolute dry weight.
A blend yarn for clothing having a humidity control function of 35% or more. 2. The equilibrium moisture absorption of the non-hygroscopic fiber at a temperature of 20 ° C and an environmental relative humidity of 65% is 5% or less of the absolute dry weight, and the equilibrium moisture absorption of the hygroscopic fiber at a temperature of 29.5 ° C and an environmental relative humidity of 96% is an absolute dry weight. Claim 1 which is 70% or more with respect to
The blended yarn according to the above item.