JP2016065330A - Leg clothes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide leg clothes of thin cloth containing elastic yarn in which a temperature comes up instantaneously at stretching, and if the stretching of knitted fabric is repeated, heat is continuously generated in stretching.SOLUTION: Leg clothes comprise elastic yarn and non-elastic yarn comprising cylindrical knitted fabric. The leg clothes are characterized as follows: the elastic yarn or the coating elastic yarn is knitted in all leg course in the knitted fabric; the content of the elastic yarn is 50-80 g/m; a knitted length per 100 knitted fabric wale of the non-elastic yarn in the coating elastic yarn in an intermediate part in a leg length or in the plating between the non-elastic yarn and the elastic yarn is 290-450 mm; The knitted fabric is extended to 80% in the warp direction, and then returned to an original length; when measuring a forward path stress and a return path stress in the 50% point on the stretching way; a stress ratio found by the stress ratio=(return path stress (N) in the 50% point)/(forward path stress (N) in the 50% point) is 0.40-0.80; and a stretching moment heat generation temperature in the warp direction is 1.0°C or more.SELECTED DRAWING: None

Description

  The present invention relates to a thin leg garment containing an elastic yarn whose temperature rises instantaneously during expansion and contraction.

Conventionally, clothes such as heat-insulating clothing that increase in temperature when worn are manufactured using a cloth mixed with moisture-absorbing heat-generating fibers such as cellulose, and heat is generated by insensitive excretion or sweating from the human body when worn. (For example, refer to Patent Document 1 below). However, the moisture-absorbing exothermic fiber does not generate any further heat when the fiber's moisture absorption reaches saturation, and not only the heat generation time is short, but also after the moisture absorption reaches saturation, the moisture in the fiber causes a cooling sensation. I even felt it. Furthermore, it is known to incorporate a heater such as a planar heating element or a linear heating element into a garment as a heating fabric or a heating garment other than hygroscopic heat generation. If you wear it, it will be heavy, and you will need an electrode, making it difficult to move.
Recently, there have been proposed knitted fabrics having a heat generation function that is completely different from the conventional one, which generates heat when the knitted fabric expands and contracts during a wearing operation (for example, see Patent Documents 2 and 3 below).

JP 2003-227043 A JP 2011-195970 A JP 2012-1112078 A

However, these knitted fabrics are surely warm and warm when stretched, but they are mostly medium-thick knitted fabrics with a large content of elastic yarn, mainly thick tights, thin 20-20 denier class cylinders. Leg clothing (thin tights, pantyhose) made of a knitted fabric is less likely to generate heat during expansion and contraction and difficult to commercialize.
Therefore, the problem to be solved by the present invention is that, in leg clothing containing elastic yarns, the temperature rises instantaneously during expansion and contraction, and if the knitted fabric is repeatedly expanded and contracted, heat is generated during expansion and contraction, and the fabric is thin. It is to provide some leg clothing.

  As a result of intensive studies and experiments to solve the above-mentioned problems, the present inventors have only used heat generated by elastic yarn expansion and contraction in order to generate heat during expansion and contraction of the tubular knitted fabric constituting the leg clothing. Since the elastic yarn content increases and the garment becomes heavy and difficult to move, it was possible to obtain important knowledge about a method of reducing the heat generated by stretching the knitted fabric while reducing the weight of the knitted fabric. In other words, in order to cause the knitted fabric to generate heat by stretching, the loop structure of the knitted fabric that can efficiently stretch the elastic yarn by the operation when wearing the leg garment is set to an optimum range, thereby making the non-elastic yarn and the elastic yarn. The present invention has been completed by finding that the instantaneous heat generation temperature during expansion and contraction is 1.0 ° C. or higher in spite of being thin.

That is, the present invention is as follows.
[1] Leg clothing comprising a tubular knitted fabric made of elastic yarn and inelastic yarn, and the covered elastic yarn covered with elastic yarn or inelastic yarn on the knitted fabric is knitted over the entire leg portion course The elastic yarn content is 50 to 80 g / m ² , in the middle part of the leg length, in the coated elastic yarn coated with the non-elastic yarn or in the plating of the non-elastic yarn and the elastic yarn The knitting length per 100 wales of the inelastic yarn is 290 to 450 mm, the knitted fabric is stretched to 80% in the warp direction, then returned to the original length, and the forward path at the time of 50% during stretching When measuring stress and return stress, the following formula (1):
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
A leg garment characterized by having a stress ratio of 0.40 to 0.80 and an instantaneous exothermic temperature of 1.0 ° C. or more during stretching in the warp direction.

  [2] A length La obtained by adding a sinker loop and a needle loop in one unit of the knitted structure when the knitted fabric is stretched 30% in both directions of warp and warp, and a tubular knitted fabric in the warp direction by 50 The loop ratio obtained by the length Lb obtained by adding the sinker loop and the needle loop in one unit of the knitted structure when% stretched is 1.35 ≦ Lb / La ≦ 1.60 in the above [1] Leg clothing as stated.

  [3] The above-mentioned [1], wherein the fineness ratio of the elastic yarn and the inelastic yarn in the structure constituting the knitted fabric = (fineness of the inelastic yarn / fineness of the elastic yarn) is 0.25 to 0.55. Or leg clothing given in [2].

  [4] The leg apparel according to any one of [1] to [3], wherein the tubular knitted fabric is in close contact with the body and covers at least the joint.

  The leg apparel of the present invention heats up the knitted fabric of the lower buttocks, knees, and thighs due to bending and stretching of the hip and knee joints by walking, etc., and it is thin but warm and cold. It is leg clothing that does not have to be.

It is the photograph replaced with drawing for demonstrating the measurement of the length of the needle loop of this invention, and a sinker loop.

Hereinafter, embodiments of the present invention will be described in detail.
The leg garment of this embodiment has a hook diameter of about 4 to 5 inches, and is made of a non-elastic yarn and an elastic material manufactured by a single circular knitting machine (also called a pantyhose knitting machine) with a small diameter of 26 to 34 gauge. The leg portion made of yarn is a tubular knitted fabric, and the knitted fabric (the following numerical values are values in the knitted fabric of the intermediate portion of the leg length described below, and the leg garment to be measured Is measured with a product having undergone dyeing and finishing set), the elastic yarn or coated elastic yarn is knitted in the entire course of the leg portion, and the content of the elastic yarn is 50 to 80 g / m ² , and the leg length intermediate portion The knitted length per 100 wales of the inelastic yarn in the coated elastic yarn or in the plating of the inelastic yarn and the elastic yarn is 290 to 450 mm, and the original length after extending the knitted fabric to 80% in the warp direction Return to the height, 50% during expansion and contraction When measured the outward stress and return stress of the following formula:
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
The stress ratio obtained by the above is 0.40 to 0.80, and the instantaneous heat generation temperature during expansion and contraction in the warp direction is 1.0 ° C. or higher.

  The leg apparel of the present embodiment preferably further includes a length La obtained by adding a sinker loop and a needle loop in one unit of the knitted fabric when the knitted fabric is stretched by 30% in both directions of the knitted fabric, The loop ratio determined by the length Lb obtained by adding the sinker loop and the needle loop in one unit of the knitted structure when stretched by 50% in the warp direction is 1.35 ≦ Lb / La ≦ 1.60.

  Furthermore, the leg garment of the present embodiment is preferably a fineness ratio between the elastic yarn and the inelastic yarn in the tubular knitted fabric structure constituting the leg garment = (fineness of the inelastic yarn / fineness of the elastic yarn). Is 0.25 to 0.55.

The above instantaneous heat generation temperature means that there is no external energy supply other than expansion and contraction, and the heat generation temperature during expansion and contraction by wind does not change. Then, the maximum temperature indicated by the knitted fabric is measured by thermography during 500 times of repeated expansion and contraction, with the process of returning to the original length once relaxed, and from the difference from the knitted fabric temperature before the start of the test. This is a calculated value.
If the knitted fabric temperature becomes higher than the knitted fabric temperature before the start of the test during 500 times of 100% expansion / contraction or immediately after expansion / contraction, it indicates that instantaneous heat generation has occurred. The knitted fabric of leg clothing of this embodiment is characterized in that the instantaneous heat generation temperature measured by this method is 1.0 ° C. or higher. At an instantaneous heat generation temperature of less than 1.0 ° C., almost no heat generation is felt. The instantaneous heat generation temperature is preferably 1.5 ° C. or higher, more preferably 2.0 ° C. or higher. The upper limit is not particularly limited as long as the instantaneous exothermic temperature is high, and the upper limit is not particularly limited as long as it does not adversely affect the human body, but if the elastic fiber content becomes too high to increase the instantaneous exothermic temperature, the knitted fabric will have high power. Therefore, the instantaneous heat generation temperature is preferably 10 ° C. or less.

  Conventional warm leg garments containing elastic yarns are thick because they place importance on heat retention, are difficult to move, and have poor aesthetics. On the other hand, the leg apparel of this embodiment is a thin leg apparel that generates heat due to expansion and contraction, and is a knitted fabric with a completely different idea from the conventional product. For this reason, in order to set the instantaneous heat generation temperature during 100% expansion / contraction to 1.0 ° C. or more, the content of elastic yarn, the amount of elastic yarn knitting, the elongation of the knitted fabric, the stress ratio of the knitted fabric, etc. are appropriate. Range, that is, knitted fabric design such as elastic yarn use, loop shape, etc., elastic yarn elongation rate to efficiently generate heat during expansion and contraction, elastic yarn draft when using coated elastic yarn The production method of the knitted fabric including the rate and the number of twists is important. By the present invention, for the first time, an elastic knitted fabric having an instantaneous heat generation temperature at 100% stretching of 1.0 ° C. or higher is obtained and worn as leg clothing. In addition, heat is generated even when the stretching amount of the human joint at the time of wearing is only 30 to 50%, and the heat generation can be felt at the time of wearing.

In the leg apparel of this embodiment, in order to make the instantaneous heat generation temperature during 100% expansion / contraction 1.0 ° C. or more, the elastic yarn contributes greatly to the heat generation during expansion / contraction, so the elastic yarn content is important. Therefore, it is necessary to contain 50 to 80 g / m ² of elastic yarn in the knitted fabric of the leg portion knitted into a cylindrical shape, and the heat generation temperature becomes higher as the elastic yarn is contained more, but the elastic yarn is contained. If the amount becomes too large, the weight of the knitted fabric will increase, the knitted fabric will become high power and it will be difficult to move as leg clothing, and if the elastic yarn content is low, the exothermic temperature during stretching will be low, so the elastic yarn content will be 50 to 80 g / m ^2, and it is preferably a 55~75g / m ^2.

The leg apparel of this embodiment is quite thin unlike the inner material and sports material, and has a large air permeability, so even if it generates heat due to expansion and contraction, it is cooled quickly and the temperature rise of the knitted fabric is low. Become. Therefore, as a result of studying a knitted fabric design that can generate heat during clothing wearing operation even in such a highly ventilated knitted fabric, the inventors of the present application found that the stress ratio of the knitted fabric and the specified stress ratio Found a means to achieve.
For example, an elastic yarn generates heat when it is stretched, absorbs heat when it is relaxed, and a perfect elastic body, that is, an elastic body in which the elongation-stress curve (SS curve) at the time of elongation completely overlaps. The heat generation temperature at the time and the endothermic temperature at the time of relaxation of elongation are substantially the same, that is, the heat generation amount is substantially zero for the entire cycle at the time of elongation and relaxation. In the present invention, the knitted fabric stress ratio for minimizing the endotherm at the time of stretching relaxation with respect to the heat generation temperature at the time of stretching of the knitted fabric, and means for achieving the specified stress ratio range are found. It is a thing.

  There are optimum conditions for the stress ratio, that is, it is extremely important that the stress ratio during expansion and contraction is 0.40 to 0.80. A general weft knitted fabric has a stress ratio of more than 0.80. However, if the stress ratio is greater than 0.80, an endothermic phenomenon occurs at the time of elongation relaxation even when heat is generated during elongation, and as a result, heat generation tends to be small. In addition, when the stress ratio is less than 0.40, it is difficult to return to the state before stretching even if stretched, so the stretching heat generation temperature does not increase, and when a leg garment is used, it is knitted after bending and stretching the knee joint and hip joint. When the ground is deformed or misaligned, the leg garment loses its shape and is not preferable. Further, when the stress ratio is too high, the exothermic temperature during expansion and contraction itself becomes low. Therefore, the stress ratio is preferably 0.40 to 0.80, and more preferably 0.45 to 0.75.

  The stress ratio is controlled by the content of the elastic yarn, the stress ratio of the elastic yarn itself (when the elastic yarn is stretched, the reciprocating stress performance at 50% stretch), and for the coated elastic yarn, the number of twists, elastic yarn and inelasticity The length ratio with the yarn (hereinafter referred to as the draft ratio) and the heat treatment conditions during finishing are important, and the stress ratio can be controlled by the slipperiness of the knitted fabric. More specifically, a method for producing a knitted fabric using an elastic yarn having a stress ratio smaller than that of a general elastic yarn. Increasing the draft rate slightly higher than usual to around 3.0 makes it easy to make the stress ratio within an appropriate range. In addition, it is possible to control the stress ratio even at the dyeing finish of the knitted fabric, and in particular, it is effective to strengthen the heating conditions when heat setting with wet heat finally put in the mold in the leg clothing manufacturing process, A heat setting at 105 ° C. to 130 ° C. is preferable, slightly higher than the normal leg clothing set temperature of around 100 ° C. If the set temperature cannot be increased, the set time should be longer than the normal set time For example, it is preferably about 40 to 90 seconds.

Furthermore, if the knitted fabric is finished so as to be slippery, the stress ratio tends to be small. Specifically, it is preferable not to use a silicon-based smoothing agent as a finishing agent. For example, the stress ratio is easily within a specified range by finishing without using a polyester-based finishing agent or a finishing agent. In addition, the stress ratio is returned to the original length after stretching the knitted fabric up to 80% in the warp direction, and the forward stress and the backward stress at the time of 50% during expansion and contraction are obtained, and the following formula:
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
Calculate by rounding off the third decimal place.
The reason why the stress ratio is obtained from the elongation and the stress at the time of 50% recovery is that it has been found that it is easy to grasp the degree of heat absorbed during the elongation recovery of the temperature generated during the knitting fabric elongation.

In the leg apparel of the present embodiment, the knitting length of the inelastic yarn in the coating elastic yarn or the plating of the inelastic yarn and the elastic yarn is also important, and the knitting per 100 wales of the knitted fabric in the middle portion of the leg length If the insertion length is 290 to 450 mm, the elastic yarn is efficiently extended during leg clothing wearing operation and the elongation heat generation temperature becomes high. When the knitting length per 100 wales of the knitted fabric is less than 290 mm, the leg clothing is worn. When the knitting length is 450 mm or more, the elastic yarn is not easily stretched during the leg clothing wearing operation, and the heat generation temperature is low. Therefore, the knitting length of the non-elastic yarn in the coated elastic yarn per 100 wales of the knitted fabric or the plating of the non-elastic yarn and the elastic yarn is 290 to 450 mm, preferably 300 to 410 mm. The knitting length of the inelastic yarn or the covered elastic yarn is obtained by the following method.
The measurement site is measured at the middle part of the leg length from the crotch to the toe, and even if the leg garment is not from the knee or ankle to the toe due to leggings or the like, it is measured at the middle part from the crotch to the bottom of the leg part. In the measurement, when the elastic yarn is knitted on the inelastic yarn, the knitting length per 100 wales of the inelastic yarn is measured with an initial load of 0.05 N (Newton). In the case of a coated elastic yarn, the elastic yarn and the non-elastic yarn of the coated elastic yarn are separated, and the braided length of the non-elastic yarn is measured by the above method. In this case, when it is difficult to separate the elastic yarn and the non-elastic yarn, only the elastic yarn in the coated elastic yarn is cut every several centimeters and measured by the above method. With these, 10 knitting lengths per 100 wales are measured, and the average value is taken as the knitting length.

  In the leg garment of this embodiment, it is important that the elastic yarn is efficiently extended by the operation at the time of wearing. That is, in a conventional knitted fabric containing an elastic yarn, the elastic yarn is meandering or curved in the knitted fabric, and when the knitted fabric is stretched, the elastic yarn is first meandered or curved, and the elastic yarn becomes straight. Furthermore, a loop deviation also occurs at the intersection of the needle loop and the sinker loop, and the needle loop or the sinker loop becomes smaller depending on the extension direction, that is, the elastic yarn has priority over the total change in the length of the needle loop and the sinker loop. Meandering and bending of the straight line, and loop deformation occurs. After these changes, the elastic yarn is stretched, which is a very inefficient structure for obtaining heat during expansion and contraction.

On the other hand, in the knitted fabric by the leg garment of this embodiment, the meandering and bending of the elastic yarn in the knitted fabric is extremely small, and the stretch of the knitted fabric efficiently stretches the elastic yarn. High knitting fabric. These structural differences between the conventional knitted fabric and the stretchable weft knitted fabric of the present invention can be clarified by the following method.
The length obtained by adding the length of the elastic yarn in one unit of the knitted structure or the length of the sinker loop of the covered elastic yarn and the length of the needle loop when stretched 30% in both the weft directions through the knitted fabric is defined as La. Furthermore, the length of the elastic yarn in one unit of the knitted fabric when the knitted fabric is stretched 50% in the knitted fabric warp direction or the length of the covered elastic yarn sinker loop and the length of the inelastic yarn needle loop The loop ratio Lb / La is obtained from Lb. For the loop ratio obtained by these measurements, in order to obtain a knitted fabric with high heat generation during stretching, it is preferable to satisfy 1.35 ≦ Lb / La ≦ 1.60, and the elastic yarn or the coated elastic yarn Lb / La can be set within this range by adjusting the braiding length and the dyeing process conditions. If Lb / La is within this range, the knitted fabric generates heat during expansion and contraction without impairing the feeling of wearing. In addition, if Lb / La is less than 1.35, the elongation rate of the elastic yarn in the knitted fabric is low, and as a result, the heat generation temperature during expansion and contraction is too low to be realized. Further, the elastic yarn is poorly stretched and recovered from elongation, and the stretched knitted fabric does not return to its original shape, and it is easy to cause a loss of shape such as knee loss. On the other hand, if it is larger than 1.60, the power of the leg garment becomes too high, which makes it difficult to wear or move, and the deformation of the knitted fabric is large, and the deformation of the inelastic yarn is increased along with the elastic yarn. As a result, the stretch recovery property is insufficient, and the knitted fabric undulates at the time of stretching relaxation, or a dimensional change due to washing occurs, which causes a loss of shape. Therefore, La and Lb preferably satisfy 1.35 ≦ Lb / La ≦ 1.60, and more preferably 1.40 ≦ Lb / La ≦ 1.55. As a result, it is possible to obtain a garment that generates heat due to expansion and contraction and does not lose its shape when worn and washed.

  La and Lb are measured by the method described below using an enlarged image taken from the needle loop side (technical face) of the knitted fabric. Obtained from the length of the needle loop. Here, it is preferable to measure the length of the elastic thread, but the needle loop of the elastic thread is often covered with an inelastic thread, and it is difficult to clearly measure the loop length. . Therefore, the length of the needle loop of the non-elastic yarn that is hidden under the needle loop of the non-elastic yarn and that can be confirmed that the needle loop of the elastic yarn is present is selected and moves almost the same as the elastic yarn when stretched. Is used as a substitute for the change in the needle loop length of the elastic yarn due to the stretch of the knitted fabric. Of course, a portion where the enlarged image is captured is not selected as a portion hidden under the non-elastic yarn and having no needle loop of the elastic yarn.

  Hereinafter, a method for measuring each loop length will be described with reference to FIG. Although FIG. 1 shows an example of measurement with a coated elastic yarn, the knitted fabric is stretched 30% in both the weft and weft directions, and in this state, the needle loop side of the knitted fabric is enlarged and observed. Measure the length of the loop from the start point a to the end point b, with the two points on both sides of the lowermost part of the needle loop (1) of the coated elastic yarn as the start point (◯ mark: a) and the end point (○ mark: b). The length of the needle loop. For the sinker loop (2), the needle loop lower end point (○ mark: b) is the start point of the sinker loop, and the end point of the sinker loop of the adjacent wale (same as the start point of the needle loop) (○ mark: c) This is the length of the sinker loop.

In addition, when the elastic yarn is a welt structure and the sinker loop extends over 2 wales, the sinker loop hidden from the needle loop existing in the middle of the sinker loop is observed from the surface without being measured. The length of only the loop is measured, and the sum of the sinker loop lengths of the respective wales is taken as the length of the sinker loop.
Similarly, in the case of plating with inelastic yarns, the needle loop is hidden behind the inelastic yarn and the elastic yarn is not visible, so the length of the needle loop of the inelastic yarn is measured, and the sinker loop is observed from the surface. Therefore, the length of the elastic thread is set to the length of the sinker loop. In this case, the elastic yarn below the needle loop cannot be observed, but the location of the elastic yarn may be estimated and measured.

Both the coated elastic yarn and the length of the central portion in the width direction of the fiber bundle are measured for both the elastic yarn and the non-elastic yarn. After each measurement, the length of the needle loop of the inelastic yarn is added to the length of the sinker loop of the elastic yarn, and the total length of the loops in one unit of the knitted structure is obtained as La. Next, the knitted fabric is further stretched by 50% in the warp direction, and similarly, the total length of the loops in one unit of the knitted structure is obtained and set as Lb, and 1.35 ≦ Lb / La ≦ 1.60. .
In the measurement of La and Lb, the length of each loop is measured in units of microns (μm), the length to at least the third digit of the decimal point is obtained, and the average length measured arbitrarily at 10 places is obtained. Lb / La is calculated based on this average length, and the third decimal place is rounded off.

  The unit of the knitting structure is a structure of a needle loop and a sinker loop, and is a unit that is repeated. For example, when a knit and a tack are repeated every one wal in the wale direction, The loop is also a needle loop, the sum of the knit loop 1 loop and the tack loop 1 loop is a needle loop, and the length obtained by adding 2 sinker loops to this is La or Lb. When the knitted structure is a welt, the width of the needle loop made of inelastic yarn is the needle loop length in the welt structure.

  In the leg garment of this embodiment, in order to make the loop length change ratio Lb / La 1.35 ≦ Lb / La ≦ 1.60, the depth of the lowering cam (degree), the change of the sinker shape, and the yarn supply amount Can be achieved by reducing the bending and meandering of the elastic yarn, and the most important design is the braided length of the elastic yarn or coated elastic yarn. In the present invention, the length of the leg portion of the product is shrunk within about 10% of the length of the raw machine so that the loop ratio is in an appropriate range in the present invention. It is set according to conditions such as the size of the mold, adjustment of the set length in the mold, and set time.

  In the leg apparel of this embodiment, in addition to the elastic yarn content, the knitting amount per 100 wales of the inelastic yarn or the coated elastic yarn, the stress ratio, the loop ratio, the fineness ratio is set within a specific range, An exothermic temperature becomes high and is preferable. Therefore, although the fineness ratio of the elastic yarn and the non-elastic yarn is preferably 0.25 to 0.55, the fineness ratio of the knitted fabric of the normal leg clothing is about 0.60 to 0.80. The knitted fabric of leg garments is characterized in that the fineness of the elastic yarn is larger than the fineness of the non-elastic yarn, and when this knitted fabric is knitted and finished normally, the texture is hard and the knitted fabric stress becomes too high Sometimes. Therefore, when manufacturing the leg apparel of this embodiment, the elastic yarn is stretched more than usual at the time of knitting, knitted so that the elastic yarn in the knitted fabric becomes apparently thin, and the power of the elastic yarn is fixed by steam setting. Is important.

  Furthermore, it is preferable that the knitted fabric is finished to be more stretched than usual at the time of dyeing. As a guideline, the knitted fabric is finished so as to shrink within about 10% of the length of the raw machine. As a result, although the elastic yarn content is slightly reduced, the elastic yarn in the knitted fabric remains stretched. As a result, in a normal knitted fabric, the fineness of the elastic yarn raw yarn and the fineness of the elastic yarn after dyeing In comparison, the fineness of the elastic yarn after dyeing is the same as that of the original yarn or 2 to 3% thinner than that of the original yarn, whereas in the elastic knitted fabric of the present embodiment, the fineness of the elastic yarn raw yarn When the fineness after dyeing is compared, the elastic yarn becomes thin by about 4 to 10% after dyeing, and the knitted fabric stress can be lowered although the exothermic temperature during expansion and contraction is small.

The method for obtaining the fineness ratio of the yarn is obtained by extracting and separating the elastic yarn and the inelastic yarn from the knitted fabric from the leg clothing product, and obtaining the weight ratio at the same number of loops in the same course.
If the elastic yarn and the non-elastic yarn cannot be separated, the cross-sectional area is obtained by observing the cross section of the non-elastic yarn and the elastic yarn in the structure constituting the knitted fabric in a state where the knitted fabric is not stretched. In the case of multifilaments for the area, the sum of the number of filaments is defined as the value obtained separately for the inelastic yarn and the elastic yarn. At this time, the cross section of the yarn has various shapes such as a circle, an ellipse, a W shape, a triangle, and an L shape. In many cases, the cross sectional area cannot be measured only by observation with an electron microscope or the like. To determine the cross-section of the yarn, enlarge the cross-section on an almost uniform paper with a known area and weight, cut it according to the cross-section after printing, and measure the weight of the paper after cutting. The cross-sectional area can be obtained by the ratio between the weight of the paper and the enlargement ratio. In this case, the fineness ratio can be easily obtained by observing the elastic yarn and the non-elastic yarn at the same magnification, printing on paper, cutting the cross section, and comparing the cross-sectional areas of the elastic yarn and the non-elastic yarn. Similarly, in the case of spun yarn, after printing the cross section, the cross section of each single fiber is cut, and the sum of the number of fibers (number of single yarns) in the cut cross section is taken as the cross sectional area. The cross-sectional area is measured at the needle loop part and the sinker loop part, and the measurement is performed by changing the loop, and the average cross-sectional area obtained from the cross-sections of the needle loop and the sinker loop at 10 locations, and the fineness ratio. Ask for. If both the needle loop part and sinker loop part are stretched while being the same loop, or there are loops with different shapes due to deformation, etc., in this case, measure at the most shaped part in the knitted fabric, formula:
Fineness ratio = (cross-sectional area of inelastic yarn) / (cross-sectional area of elastic yarn)
Ask for.
In addition, when printing a cross section on paper and cutting the cross section to obtain the fineness ratio, the following formula:
Fineness ratio = (weight of paper from which cross section of inelastic yarn is cut) / (weight of paper from which cross section of elastic yarn is cut)
Ask for.
The fineness ratio is calculated by rounding off the third digit after the decimal point.

The leg apparel of the present embodiment can be manufactured by a small-diameter tubular knitting machine such as a pantyhose knitting machine, and the knitting structure can be knitted by a knitting structure mainly composed of a knit loop such as a tengu structure or a kanoko structure. In particular, in the case of a tentacle structure, it is preferable to use a knitting machine having a gauge of 28 gauge or more. Also, regarding the knitting method of the elastic yarn, the elastic yarn and the non-elastic yarn are plated (attached yarn knitting), A covered elastic yarn obtained by covering an elastic yarn with an inelastic yarn may be used, and these may be used alone or mixed to form a knitted fabric.
The coated elastic yarn may be a SCY or DCY covering yarn in which an inelastic yarn is wound around an elastic yarn, a twisted yarn, an injection-processed yarn, or the like, and may also be a coated elastic yarn made of CSY coated with a spun yarn. Absent. Furthermore, it is necessary for the elastic yarn to be contained in the entire course of the leg portion, and it is difficult to obtain a high exothermic temperature during expansion / contraction when knitting with the non-elastic yarn.

  In the leg apparel of this embodiment, it is possible to form a tack loop or a welt loop in the knitted fabric, and by forming these tack loops or a welt loop, the exothermic temperature at the time of expansion / contraction is increased, and the structure can be made singly or in combination. As an example of a combination, a structure in which a knit loop and a tack loop or a welt loop are alternately or arbitrarily arranged in a wale direction, or a knit loop and a tack loop or a welt loop in a course direction. It is possible to use a structure in which these are arranged alternately or in arbitrary repeating units. Of course, warp border patterns, weft border patterns, floral patterns, etc. can be formed in the knitted fabric.

  The leg apparel of the present embodiment has a high power portion and a low power portion that are partially different in power, such as dotted, linear, and curved, by changing the knitting structure, yarn usage, or performing resin printing. You may mix a power part. In this case, it is only necessary to satisfy this performance even in a part of the knitted fabric. For example, it is possible to place a high heat generation knitted fabric only at the part where you want the heat generation effect at the time of expansion and contraction, such as the knee, and a high power constant stretch knitted fabric can be arranged around the knee etc. Moreover, it is possible to obtain a product aimed at protecting the knee joint and the like at the low extension portion.

  The elastic yarn used in the leg garment of the present embodiment can be a polyurethane-based or polyether ester-based elastic yarn. For example, as the polyurethane-based elastic yarn, a dry-spun or melt-spun yarn can be used, and a polymer The spinning method is not particularly limited. The breaking elongation of the elastic yarn is about 400% to 1000%, is excellent in stretchability, and it is preferable that the stretchability is not impaired near the normal processing temperature of 180 ° C. in the presetting process during dyeing. As the elastic yarn, an elastic yarn imparted with functions such as high setting property, antibacterial property, moisture absorption and water absorption by addition of a special polymer or powder can be used. Regarding the fineness of the elastic yarn, it is possible to use a fiber of about 20 to 70 dtex, it is preferable to use an elastic fiber of about 30 to 60 dtex, which is easy to manufacture a knitted fabric and has a high elongation heat generation temperature. It is also possible to use these covered elastic yarns, such as covering yarn in which inelastic yarn is wound around elastic yarn, twisted yarn, and mixed yarn in which inelastic yarn and elastic yarn are mixed by air injection or the like. is there.

  Furthermore, the leg apparel of this embodiment can contain an inorganic substance in the elastic yarn, and can be a knitted fabric that takes into account the performance of the contained inorganic substance. For example, when titanium oxide is contained, The heat generated from the ground can be stored in titanium oxide, and heat retention due to the far-infrared effect can be imparted. As the method of containing an inorganic substance, the simplest method is to add an inorganic substance to a spinning dope for elastic yarn and perform spinning. The inorganic substance refers to ceramics such as titanium oxide, inorganic simple substances such as carbon and carbon black, and / or inorganic compounds, and is preferably in a fine powder form so as not to hinder spinning of the elastic yarn. These inorganic substances are preferably contained in the elastic yarn in an amount of 1 to 10% by weight. By containing the inorganic substance, it becomes possible to more effectively exhibit the heat retention effect during heat generation of the knitted fabric. If the inorganic substance is small, the heat retention effect is small, and if it is too large, the yarn may break during spinning or stretching, so the content is preferably 1 to 10% by weight, more preferably 2 to 5% by weight. .

  Examples of the elastic yarn used in the leg apparel of this embodiment include polyurethane-based elastic yarn and polyetherester-based elastic yarn, but there is a method of increasing the molecular weight of the elastic yarn in order to increase the exothermic temperature during expansion / contraction. As another method, it is preferable to use an elastic yarn having a reduced stress ratio. For example, as shown in JP 2001-140127 A, a monofunctional amine or a hydroxyl group of either a primary amine or a secondary amine is used. And an average number of urea bond units per molecule obtained by reacting a nitrogen-containing compound containing at least one selected from tertiary nitrogen and heterocyclic nitrogen with an organic diisocyanate is 4 to 40 Urethane urea compound; as shown in Japanese Patent No. 4343446, at least one of a bifunctional amino group selected from at least one of a primary amine and a secondary amine, a tertiary nitrogen and a heterocyclic nitrogen Nitrogen-containing compounds containing nitrogen-containing groups selected from species, organic diisocyanates, mono- or dialkyl monoamines, alkyl monoalcohols, and organic A urea compound obtained by reacting with at least one compound selected from the group consisting of noisocyanates; a mixture of a polyacrylonitrile-based polymer, a low molecular diol, and a polymer diol disclosed in JP-A-7-316922 And a polyurethane having a terminal hydroxyl group structure obtained by reaction with an organic diisocyanate; or a method of spinning by adding a styrene-maleic anhydride copolymer or the like. Examples of the polyurethane having a terminal hydroxyl group structure include a low molecular diol having a hydroxyl group at both ends of a linear or branched alkylene group having 2 to 10 carbon atoms or a divalent alicyclic hydrocarbon, and a number average molecular weight of 400 to 400. A number average molecular weight of 10,000 to 40,000, which is a reaction product of a mixture of 3000 high molecular diols (molar ratio 1 to 99) and an organic diisocyanate, having a terminal hydroxyl group and a urethane group concentration of 3 meq / g or more. The polyurethane polymer is preferred. These may be added to the elastic yarn singly or in combination of two or more. However, if the addition amount is small, the exothermic temperature effect at the time of expansion / contraction is low, and conversely if the addition amount is large, the stretchability of the knitted fabric decreases. The shape is easily lost due to wearing and washing, so the addition amount is 2.0 to 15.0%, preferably 2.5 to 8.0%, based on the weight of the elastic yarn.

  Examples of inelastic yarns used in the present invention include polyester fibers such as polyethylene terephthalate and polytrimethylene terephthalate, polyamide fibers, and polyolefin fibers such as polypropylene, and cellulose fibers such as cupra, rayon, cotton, and bamboo fibers. Any fiber such as wool fiber such as wool can be used. Also, these bright yarns, semi-dal yarns, full dull yarns, etc. can be used arbitrarily, and the fibers can have any cross-sectional shape such as round, elliptical, W-shaped, saddle-shaped, hollow fiber, etc. The form of the fiber is not particularly limited, and a crimped yarn such as a raw yarn or false twist can be used, and the thickness of the inelastic yarn is 10 to 60 dt, preferably 12 to 45 dt. Use is preferred. Further, it may be a long fiber or a spun yarn, and a composite yarn obtained by mixing two or more kinds of fibers by twisting, covering, air blending, or the like can be used. Furthermore, it is of course possible to mix two or more types of fibers on the knitting machine instead of mixing the fibers themselves.

  In the case of inelastic yarns used in the present invention, particularly polyester fibers, polyamide fibers, and cellulose fibers, it is preferable to contain 0.3 to 5% by weight of an inorganic substance. By containing the inorganic substance, it is possible to more effectively exhibit the heat retaining effect when the elastic knitted fabric generates heat. If the inorganic substance is small, the heat retention effect is small, and if it is too large, yarn breakage may occur at the time of spinning or stretching. Therefore, the content is more preferably 0.5 to 5% by weight, and further preferably 0.4 to 3%. It is contained by weight%.

In the leg apparel of this embodiment, if a material that absorbs moisture such as cellulose is used for the non-elastic yarn, it will generate heat due to moisture absorption when worn, and it will also generate heat by exercising, thereby enhancing the effect of the present invention. Is possible. Furthermore, it is possible to make it difficult to release the heat generated by using spun yarn or raising, and it is possible to enhance the heat retaining effect.
As a dyeing finishing method for leg clothing of this embodiment, a normal dyeing finishing process can be used, and dyeing conditions according to the fiber material to be used are used, and a dyeing machine to be used is arbitrary such as a paddle dyeing machine, a drum dyeing machine, It is also possible to use a processing agent that improves water absorption and flexibility and a processing agent that improves heat retention.
The leg apparel of this embodiment is particularly effective for pantyhose and thin tights, but can also be used as bottoms such as sports, inners, and other sports such as spats, sports tights and compression tights. If it is sewn on clothing that covers the joint where the knitted fabric is expanded and contracted during operation, it becomes warm clothing due to daily operations and exercise.

EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited only to these Examples. In addition, evaluation in an Example was performed with the following method.
(1) Sampling The following measurement is performed in the middle of the leg length from the crotch to the toe of leg clothing placed flat in a non-stretched state with no distortion or deformation on the knitted fabric, leg clothing is leggings If there is no toe, such as under the knee tights, sample at the middle of the leg length from the crotch to the bottom of the leg.

(2) Instantaneous exothermic temperature The instantaneous exothermic temperature is measured by measuring the highest sample surface temperature during the specified number of repetitions of stretching and relaxation (returning) using the following repeated stretch tester. Measure the instantaneous heat generation temperature in the celestial direction.
Repeating expansion and contraction machine: Dematcher testing machine (manufactured by Daiei Scientific Instruments)
Sample size: length 100 mm (excluding gripping part), width 60 mm
Measurement environment: constant temperature and humidity conditions of temperature 20 ° C. and humidity 65% RH. Measured with no external energy supply other than expansion and contraction.
Elongation amount: 100% of the initial length
Repeated expansion / contraction cycle: 2 times / second Exothermic temperature measurement: Sample surface temperature during continuous extension 500 times and after completion of extension is continuously measured by thermography. The emissivity of the thermography is set to 1.0.
Exothermic temperature evaluation: The temperature when the surface of the sample to be measured reaches the maximum temperature is read, and the temperature that is higher than the temperature before expansion / contraction is defined as the instantaneous exothermic temperature.

(3) Elastic yarn content The elastic yarn content (g / m ² ) in the knitted fabric is obtained by the following method and rounded to one decimal place.
The inelastic yarn in the knitted fabric is removed by untwisting and separating, and the weight of only the elastic yarn is measured and converted to the weight per unit area. If it is difficult to remove the non-elastic yarn by untwisting and separating, measure the weight of the yarn that has not been removed by removing the elastic yarn or the non-elastic yarn by dissolution etc. from the knitted fabric after the weight measurement. Determine the weight of the elastic yarn.

(4) Stress ratio The stress ratio is measured by the following method.
Sample size: length 100 mm (excluding gripping part), width 25 mm
Tensile tester: Tensilon tensile tester (RTC-1210A manufactured by Orientec Co., Ltd.)
Initial load: 0.1N
Tensile speed and recovery speed: 300 mm / min Tensile length and measurement: Elongate to 80% elongation, return to the original length after stretching at the same speed (recover), and repeat stretching and recovery three times under these conditions, The outward stress and the backward stress at the time of 50% during the third expansion / contraction are obtained, and the third decimal place is rounded off from the following formula.
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))

[Example 1]
An elastic yarn 44 dtex (trade name Roika SF: manufactured by Asahi Kasei Fibers Co., Ltd.) is covered with a nylon base yarn 13 dtex / 7 filament at a draft rate of 3.0 and a twist number of 1900 T / m to obtain a coated elastic yarn. . Using this covered elastic yarn, we decided to manufacture a pantyhose with a tengu structure using a single circular knitting machine (pantyhose circular knitting machine) with a hook diameter of 4 inches and 400 needles (32 gauge). The knitted length of the middle part from the toe to the toe was set to 320 mm / 100 wales, and the pressure was gradually lowered from the ankle part to the thigh (the degree was increased), and the pantyhose of the stepwise pressure was produced.
The obtained cylindrical leg from the two leg parts to the panty part was sewn together to obtain pantyhose. Next, the pantyhose of the raw machine was folded and steam set at 100 ° C. for 30 minutes, and after scouring with a paddle dyeing machine, nylon was dyed at 100 ° C. for 60 minutes. After dyeing, after fixing the nylon to improve fastness, it was treated with a polyester-based finishing agent 4% aqueous solution at 40 ° C. for 10 minutes, taken out from the paddle dyeing machine, dehydrated and dried. After drying, it was put into a leg-shaped formwork steam setting machine and finished by heat treatment at 120 ° C. for 40 seconds. In addition, in this formwork steam set, the leg length was extended so that the contraction was within 10% of the length of the raw machine, and the steam set was performed.
The results of evaluating the performance of the obtained leg clothing are shown in Table 1 below. In the knitted fabric of Example 1, the instantaneous exothermic temperature at the time of expansion and contraction was 1.0 ° C. or more, and although it was thin and easy to move, it was possible to make warm leg clothing.

[Examples 2-7, Comparative Examples 1-4]
A knitted fabric (Examples 2 and 3 and Comparative Examples 1 and 2) in which the knitting length is changed from Example 1, a knitted fabric (Example 4) in which the stress ratio is changed by changing the steam setting conditions for finishing, and elasticity A knitted fabric in which the fineness of the yarn was 56 dtex (Example 5), a knitted fabric in which the fineness of the elastic yarn was 33 dtex (Example 6), a knitted fabric in which the fineness of the elastic yarn was 22 dtex (Comparative Example 3), Legs under the same conditions as in Example 1 except for a knitted fabric with a fineness of 78 dtex (Comparative Example 4) and a knitted fabric (Example 7) in which the loop ratio was changed by changing the size of the mold and the steam set time. Table 1 below shows the results of leg apparel produced by manufacturing apparel.

[Example 8]
Prepare the polyurethane polymer (agent A) used in Example 4 of JP-A-7-316922 and the urethane urea compound (agent B) used in Example 1 of JP-A-2001-140127. The elastic yarn 44dtex (trade name Roika CR: manufactured by Asahi Kasei Fibers Co., Ltd.) was manufactured by adding 7 wt% of agent A and 3 wt% of agent B to the spinning bath, except that this was used. A knitted fabric was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1 below.

[Example 9]
An elastic yarn 44 dtex (trade name Roika SF: manufactured by Asahi Kasei Fibers Co., Ltd.) and a nylon false twisted yarn 22 dtex / 17 filament are plated with an elastic yarn draft rate of 2.9, the hook diameter is 4 inches, and the number of needles is 368 (30 gauge) single circular knitting machine (pantyhose circular knitting machine) to manufacture pantyhose, the knitting length of the middle part from leg inseam to toe is 350mm / 100 wal, and from ankle to thigh In the manufacturing process, the pressure was gradually lowered (the degree was increased) and pantyhose with stepwise pressure was produced.
The obtained cylindrical leg from the two leg parts to the panty part was sewn together to obtain pantyhose. Next, the pantyhose of the raw machine was folded and steam set at 100 ° C. for 30 minutes, and after scouring with a paddle dyeing machine, nylon was dyed at 100 ° C. for 60 minutes. After dyeing, after fixing the nylon to improve fastness, it was treated with a polyester-based finishing agent 4% aqueous solution at 40 ° C. for 10 minutes, taken out from the paddle dyeing machine, dehydrated and dried. After drying, it was put into a leg-shaped formwork steam setting machine and finished by heat treatment at 120 ° C. for 40 seconds. In addition, in this formwork steam set, the leg length was extended so that the contraction was within 10% of the length of the raw machine, and the steam set was performed.
The results of evaluating the performance of the obtained leg clothing are shown in Table 1 below. In the knitted fabric of the present invention of Example 9, the instantaneous heat generation temperature at the time of expansion / contraction was 1.0 ° C. or higher, and although it was thin and easy to move, it was possible to obtain a warm leg apparel.

  The leg apparel of the present invention is particularly effective for pantyhose and thin tights, but can also be used as bottoms such as sports, inners, and other sports such as spats, sports tights, compression tights, etc. If it is sewn on clothing that covers joints where the knitted fabric is stretched sometimes, it becomes warm clothing due to daily movement and exercise.

1 Needle loop 2 Sinker loop a Start point of needle loop b End point of needle loop and start point of sinker loop c End point of sinker loop

Claims (4)

Leg clothing comprising a tubular knitted fabric composed of elastic yarn and inelastic yarn, wherein the elastic yarn is covered with the elastic yarn or the coated elastic yarn covered with the inelastic yarn is knitted on the entire leg portion The elastic yarn content is 50 to 80 g / m ² , and the inelasticity in the middle part of the leg length, in the coated elastic yarn coated with the inelastic yarn, or in the plating of the inelastic yarn and the elastic yarn The knitting length per 100 wales of the knitted fabric of the yarn is 290 to 450 mm. After the knitted fabric is stretched to 80% in the warp direction, the knitted fabric is returned to the original length, and the outward stress and the return pass at the time of 50% during the stretching When measuring stress, the following formula (1):
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
A leg garment characterized by having a stress ratio of 0.40 to 0.80 and an instantaneous exothermic temperature of 1.0 ° C. or more during stretching in the warp direction.   When the knitted fabric is stretched by 30% in both directions, the length La is the sum of the sinker loop and needle loop in one unit of the knitted structure, and the tubular knitted fabric is stretched by 50% in the warp direction. The leg clothing according to claim 1, wherein a loop ratio obtained by a length Lb obtained by adding a sinker loop and a needle loop in one unit of a knitted fabric is 1.35 ≦ Lb / La ≦ 1.60. .   The fineness ratio of the elastic yarn and the inelastic yarn in the structure constituting the knitted fabric = (fineness of the inelastic yarn / fineness of the elastic yarn) is 0.25 to 0.55. Leg clothing.   The leg garment according to any one of claims 1 to 3, wherein the tubular knitted fabric is in close contact with a body and covers at least a joint portion.