JP2014198914A - Knitted fabric and clothing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitted fabric containing elastic yarns, in which the temperature rises instantaneously upon elongation, which permanently generates heat upon elongation when undergone repeated elongation and recovery, and which is excellent in motion followability by wearing motion.SOLUTION: The knitted fabric is composed of elastic yarns and non-elastic yarns. The content of the elastic yarns is 30-60 g/m. The warp knitted fabric is elongated up to 80% and then is returned to the original length. The stress ratio which is obtained from stress of a forward path and stress of a backward path at a point of 50% in the middle of elongation and returning and is expressed by the following expression: stress ratio=(stress of a backward path at a point of 50% (N))/(stress of a forward path at a point of 50% (N)) is 0.60-0.80. The density ratio between the density in a warp direction and the density in a weft direction which is expressed by the following expression: a density ratio=(a density in a warp direction (course/inch))/(a density in a weft direction (wale/inch)) is 1.7-2.2. The elongation stresses in the warp direction and the weft direction when the knitted fabric is elongated 80% are 3.0-6.0 N. The instantaneous exothermic temperature when elongated in at least one of the warp and weft directions is 1.0°C or more.

Description

  The present invention relates to a knitted fabric containing an elastic yarn, which has a temperature that instantaneously rises when stretched and is excellent in stretchability and wearing feeling, and a garment made of the knitted fabric.

  2. Description of the Related Art Conventionally, sportswear that fits the body contains elastic yarn and has been developed for wear that has excellent extensibility and good wearing feeling. For example, in the following Patent Document 1, excellent stretchability and stretch recovery that can be used for inner, sportswear, swimwear, and the like, thereby proposing a knitted fabric that is excellent in exercise followability and wearing feeling, which are new functions, As a result, there is no loss of shape such as missing elbows or knees during wear wearing exercise, and there is no discomfort such as falling off with tights and rising off with shirts, resulting in good wearing feeling. In recent years, however, especially in winter, in addition to the above functions, clothing that increases in temperature when worn, such as a warming garment, is required. For this reason, clothing is manufactured from a fabric mixed with moisture-absorbing exothermic fibers such as cellulose. Application of a fabric that generates heat by insensitive excretion or sweating from the human body (for example, see Patent Document 2 below), but the moisture-absorbing heat-generating fiber generates more heat when the fiber's moisture absorption reaches saturation. Not only was the heat generation time short, but after the amount of moisture absorption reached saturation, there was even a feeling of cooling due to the moisture in the fibers. 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 completely different heat generation function that generates heat when the knitted fabric is stretched during wearing (for example, see Patent Documents 3 and 4 below).

WO2011 / 070828 JP 2003-227043 A JP 2011-195970 A JP 2012-1112078 A

However, in order to improve the movement following ability, it is necessary to make the knitted fabric low stress and high elongation. In order to improve the elongation heat generation, it is rather high stress and low elongation. Since the function of generating heat when stretched is contradictory to the function of being excellent in movement following and wearing feeling, it has been difficult to combine them.
The problem to be solved by the present invention is that, in a knitted fabric containing elastic yarns, the temperature rises instantaneously when stretched, and if the knitted fabric is repeatedly expanded and contracted, heat is generated continuously when stretched, and movement followability and Providing a knitted fabric with excellent wearing feeling, sewing to clothes such as inner and sportswear using the knitted fabric, heat retention, prevention of injuries caused by warming muscles and joints of stretched parts, and fat burning It is to provide clothes that can be expected to be effective.

As a result of intensive studies and repeated experiments to solve the above-mentioned problems, the present inventors have the following configuration in a knitted fabric composed of inelastic yarns and elastic yarns, so that the instantaneous heat generation temperature during elongation is 1 The present inventors have found that the knitted fabric can be made at a temperature of 0.0 ° C. or higher and has excellent motion following ability, and has completed the present invention.
That is, the present invention is as follows.

[1] an elastic yarn and non-elastic yarn comprising a knitted fabric, the content of the elastic yarn is 30 to 60 g / m ^2, returns the該経knitted fabric elongation after original length up to 80% The following formula obtained from the outward stress and the backward stress at the time of 50% during expansion and contraction:
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
The stress ratio represented by the formula is 0.60 to 0.80, and the following formula of the warp direction density and the weft direction density:
Density ratio = (Draft density (course / inch)) / (Latitudinal density (wale / inch))
The elongation ratio in the warp direction and the weft direction at 80% elongation of the knitted fabric is 3.0 to 6.0 N, and the weft The knitted fabric characterized by having an instantaneous heat generation temperature at least in one direction of elongation of 1.0 ° C or higher.

  [2] The fineness ratio of the elastic yarn to the inelastic yarn in the structure constituting the knitted fabric = (fineness of the inelastic yarn / fineness of the elastic yarn) is 1.4 to 2.5 [1] ] The knitted fabric described in].

[3] A length La obtained by adding the length of the sinker loop of the elastic yarn and the length of the needle loop of the inelastic yarn in one unit of the knitted structure when the knitted fabric is stretched by 30% in both directions. Ratio of the length of the elastic yarn sinker loop in one unit of the knitted fabric and the length of the needle loop of the inelastic yarn when the knitted fabric is further extended by 50% in any one direction of the history = (Lb / La) is the following formula (1):
1.15 ≦ Lb / La ≦ 1.60 (1)
The knitted fabric according to [1] or [2], wherein

  [4] The knitted fabric according to any of [1] to [3], wherein the knitted fabric is a plurality of warp knitted fabrics and elastic yarns are knitted with an atlas structure.

  [5] In any of the above [1] to [3], which is a double circular knitted fabric, and a course containing only elastic yarn and a course containing only inelastic yarn are alternately arranged in one complete knitting order. The knitted fabric described.

  [6] A garment that includes the knitted fabric according to any one of [1] to [5], is in close contact with the body, and covers at least a joint.

  [7] The garment according to [6], selected from the group consisting of bottoms, tops, legs, supporters, and gloves.

  The garment in which the knitted fabric of the present invention is arranged is warmed by heating the knitted fabric at a temperature of 1.0 ° C. or more due to bending and stretching of the knees and arms, and is excellent in heat retention, and the knitted fabric is stretched following the wear stretching direction. The product is excellent in the comfort of movement when worn, and does not lose its shape during wearing. In addition, by warming the muscles at the extension site, it can be expected to prevent injuries, fat burning effects, and prevent lowering of motor function due to lowering of muscle temperature, and also prevent and alleviate failure pain such as knee pain.

It is a figure explaining the method to measure the length of the needle loop of an inelastic yarn, and the length of the sinker loop of an elastic yarn. FIG. 10 is a knitting diagram of a smooth structure knitted by a double circular knitting machine in Example 8. It is the schematic of the apparatus for measuring knitting fabric sagging property.

Hereinafter, the present invention will be described in detail.
The knitted fabric of the present invention is a knitted fabric comprising inelastic yarns and elastic yarns produced by a 26 to 40 gauge multi-warp warp knitting machine and a 28 to 36 gauge circular knitting machine. The yarn content is 30 to 60 g / m ² , the warp knitted fabric is stretched to 80% after being stretched, and the following formula is obtained from the outward stress and the backward stress at the time of 50% during stretching.
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
The stress ratio represented by the formula is 0.60 to 0.80, and the following formula of the warp direction density and the weft direction density:
Density ratio = (Draft density (course / inch)) / (Latitudinal density (wale / inch))
The elongation ratio in the warp direction and the weft direction at 80% elongation of the knitted fabric is 3.0 to 6.0 N, and the weft The instantaneous heat generation temperature at least in one direction of elongation is 1.0 ° C. or more.

In the present invention, the instantaneous heat generation temperature means that the knitted fabric is stretched by 60 to 100% and then relaxed in an environment in which the external heat supply other than expansion and contraction is not received and the heat generation temperature does not change due to wind. The maximum temperature indicated by the knitted fabric is measured by thermography during 100 times of repeated expansion and contraction with the process of returning to the length of 1 and calculated from the difference from the knitted fabric temperature before the start of the test.
If the knitted fabric temperature becomes higher than the knitted fabric temperature before the start of the test during 100 times of 60 to 100% stretching or immediately after completion of stretching, it indicates that instantaneous heat generation has occurred. The knitted fabric of the present invention is required to have an instantaneous heat generation temperature of 1.0 ° C. or higher measured by this method. 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. In addition, the instantaneous heat generation temperature at 60% to 100% elongation in at least one direction of the knitted fabric weft direction may be 1.0 ° C. or more, and the instantaneous heat generation temperature is 1 in both the warp direction and the weft direction of the knitted fabric. In the case of a knitted fabric of 0 ° C or higher, there is no need to take into account the direction of mold insertion when sewing the product, but in the case of a knitted fabric that generates heat instantaneously in only one direction, the direction where the skin elongation is particularly large at the joints of the human body Can be made to coincide with the direction of the knitted fabric having a large instantaneous heat generation, it is possible to manufacture warm clothes during exercise.

  Note that the elongation amount at the time of measuring the exothermic temperature is set by the knitted fabric elongation under a 9.8 N load of a knitted fabric having an initial length of 10.0 cm and a width of 2.5 cm, and the knitted fabric elongation is 100% or more. The elongation amount is 100%, and when the knitted fabric elongation is 60% or more and less than 100%, the elongation amount is 0.9 times the elongation under the load of 9.8 N, for example, 9 The extension amount when the knitted fabric elongation under 8 N load is 80% is set as 80 × 0.9 = 72%. It is necessary to design the knitted fabric under a load of 9.8 N so that the knitted fabric in either the warp direction or the weft direction is 60% or more. If it is less than 60%, it can be said that it is not suitable for clothes that are in close contact with the skin because the tension when wearing clothes is too strong to move easily. The measurement method of the knitted fabric under a load of 9.8 N and the measurement method of the exothermic temperature will be specifically described in the following examples.

  Conventional knitted fabrics that contain elastic yarns give the knitted fabric stretchability and give it a comfortable fit when wearing clothes, which makes it possible to obtain slim aesthetic garments and improve motor functions. It was something to do. On the other hand, one of the objects of the present invention is to obtain a knitted fabric that generates heat by expansion and contraction, and is a knitted fabric with a completely different concept from the conventional product. In order to set the instantaneous heat generation temperature at 60 to 100% elongation to 1.0 ° C. or more, the content of elastic yarn, the fineness ratio of elastic yarn to inelastic yarn, the number of loops, the stress ratio of knitted fabric, etc. are appropriate. It is important to set the range, that is, a knitted fabric design such as yarn use and loop structure, and a knitted fabric manufacturing method including a processing method for efficiently exhibiting extension heat generation. According to the present invention, an elastic knitted fabric having an instantaneous heat generation temperature of 1.0 ° C. or higher at 60 to 100% elongation is obtained for the first time. Even when it is stretched by a large percentage, it generates high heat, so that it can be felt when worn.

In the knitted fabric of the present invention, in order to make the instantaneous heat generation temperature at 60 to 100% elongation to be 1.0 ° C. or more, the elastic yarn greatly contributes to the elongation heat generation, so the elastic yarn content is important. Therefore, it is necessary to contain 30 to 60 g / m ² of elastic yarn in the knitted fabric. The more the elastic yarn is contained, the higher the heat generation temperature. Therefore, the content of the elastic yarn in the knitted fabric is preferably 25 to 45 g / m ² . If the elastic yarn content is low, the exothermic temperature is low, and if the elastic yarn content is too high, the weight of the knitted fabric increases and the knitted fabric becomes high power, making it difficult to move as a garment. The content is preferably 30 to 60 g / m ² .

Regarding the knitted fabric of the present invention, as a result of studying a knitted fabric design that is exothermic and excellent in movement follow-up, the inventors of the present application have found that the optimal knitted fabric stress ratio that achieves these objects, 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 0.60 to 0.80. The stress ratio of a general knitted fabric is 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 if heat is generated during elongation, and as a result, heat generation tends to be small. In addition, when the stress ratio is less than 0.60, the heat generation at the time of stretching becomes high, but when it is used as a garment, the followability of movement is not sufficient, and the knitted fabric is deformed after bending and stretching the joints of elbows and knees. This is not preferable because the clothing loses its shape. The stress ratio is controlled by the elastic yarn content, the stress ratio of the elastic yarn itself (when the elastic yarn is stretched, the reciprocating stress performance at 50% stretch), the fineness ratio of the elastic yarn and the inelastic yarn, and the loop structure of the elastic yarn The stress ratio can be controlled by the arrangement of the elastic yarn in the knitted fabric and the slipperiness of the knitted fabric. As for the fineness ratio between the elastic yarn and the non-elastic yarn, the stress ratio decreases as the fineness ratio increases, and further, a method of making a knitted fabric using an elastic yarn having a stress ratio smaller than a general elastic yarn, or It is possible to control the stress ratio even during dyeing of the knitted fabric. In particular, it is effective to increase the heating conditions during heat setting. Heating at 190 to 195 ° C is slightly higher than the normal setting temperature. Setting is preferable, and when the setting temperature cannot be increased, the setting time may be longer than the normal setting time, and for example, it is preferably about 70 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. The stress ratio is obtained by returning the original length after stretching the knitted fabric to 80%, obtaining the forward stress and the return stress at the time of 50% during expansion and contraction, and the following formula:
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
Calculate by rounding off the third decimal place.
Note that the knitted fabric is stretched to 80% and the stress ratio is determined by the stress during stretching. If the knitted fabric has a low elongation and it is difficult to stretch to 80%, it stretches to 60% and the original length after stretching. The stress ratio is obtained from the outward stress and the backward stress at the time of 50% during expansion and contraction.
In addition, the stress ratio is determined by the elongation and the stress at the time of recovery 50%, because it is easy to grasp the degree of heat absorption at the time of stretching recovery of the knitted fabric. The lower the stress ratio, the lower the endothermic temperature. This is because an exothermic temperature can be obtained.

  In the knitted fabric of the present invention, it is also important that the elastic yarn is efficiently stretched by the operation when worn as clothes. 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. Since the elastic yarn is stretched after such changes, the elastic thread is stretched, and the structure is very inefficient to obtain the heat generated at the time of stretching required by the present invention.

On the other hand, in the knitted fabric of the present invention, 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. It becomes. These structural differences between the conventional knitted fabric and the warp knitted fabric of the present invention can be clarified by the following method.
Length and inelasticity of the sinker loop of elastic yarn in one unit of knitted fabric when the knitted fabric is stretched by 30% in either the warp or weft direction and the stretch rate in the other direction is 0% A length obtained by adding the length of the needle loop of the yarn is defined as La. Furthermore, the length obtained by adding the length of the sinker loop of the elastic yarn and the length of the needle loop of the non-elastic yarn in one unit of the knitted fabric when the knitted fabric is stretched 50% in the same direction as the La measurement direction. Let Lb. In order to obtain a knitted fabric with high heat generation during elongation, it is preferable that 1.15 ≦ Lb / La ≦ 1.60 is satisfied. Lb / La can be set within this range by adjusting the knitting structure and the dyeing process conditions. When Lb / La is within this range, the knitted fabric generates heat when stretched without impairing the feeling of wearing. In addition, if Lb / La is less than 1.15, the elongation rate of the elastic yarn in the knitted fabric is low, and as a result, the heat generation temperature at the time of elongation is too low to be felt. In addition, the elastic yarn is poorly stretched and recovered from elongation, and the stretched knitted fabric does not return to its original shape, and the knitted fabric is undulated and easily loses its shape. On the other hand, if it is larger than 1.60, the elastic yarn power becomes too high, which makes it difficult to wear and difficult to move, as well as large deformation of the knitted fabric and large deformation of the inelastic yarn together 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 1.15 ≦ Lb / La ≦ 1.60, and more preferably 1.20 ≦ Lb / La ≦ 1.55. As a result, it is possible to make clothes that do not lose shape when worn and washed while generating heat due to elongation.
In addition, after measuring the La by stretching the knitted fabric by 30%, it is further stretched by 50% in order to measure Lb. However, when the knitted fabric has a low elongation and is difficult to stretch, the initial length is 10.0 cm and the width is 2 The Lb may be measured by extending the knitted fabric to an elongation under a load of 22.05 N of a .5 cm knitted fabric.

  In the present invention, La and Lb are the length of the sinker loop of the elastic yarn in one unit of the knitted fabric 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 of the inelastic yarn. 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. The knitted fabric is stretched 30% in both directions of the knitted fabric, and in this state, the needle loop side of the knitted fabric is enlarged and observed. As shown in FIG. 1, the lowermost two points of the needle loop that can be observed on both lower sides of the needle loop of the inelastic yarn are set as the start point 2 and the end point 3, respectively, and the loop length from the start point 2 to the end point 3 is measured. , The length of the needle loop (1) of the inelastic yarn. As for the sinker loop, as shown in FIG. 1, regarding the elastic yarn between the needle loop and the needle loop observed between the two wales, both ends of the elastic yarn are set as the start point 5 and the end point 6 of the sinker loop, and the length between them is The length of the elastic thread sinker loop (4) is measured.

  When the elastic yarn is covered with the non-elastic yarn, such as when using a covering yarn, the portion where the elastic yarn is located is estimated and the length of the elastic yarn is measured. In this case, the elastic yarn in the portion covered with the non-elastic yarn is measured as existing in a straight line. 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 defined as the sinker loop (d) length.

Both the elastic yarn and the non-elastic yarn measure the length of the center portion in the width direction of the fiber bundle. After each measurement, the length of the needle loop (a) of the inelastic yarn is added to the length of the sinker loop (d) 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 or the weft direction, and the total length of the loops in one unit of the knitted structure is obtained in the same manner as Lb. Such measurement is performed in both the longitudinal direction and the weft direction, and it is sufficient that 1.15 ≦ Lb / La ≦ 1.60 in either the longitudinal direction or the longitudinal direction. In the case of a knitted fabric that can be stretched in only one direction, only the stretchable direction is measured and used as the loop length.
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.

In addition, in the case of warp knitting, the unit of the knitting structure is a length obtained by adding one knit loop and one sinker loop when a knit loop and a sinker loop are repeated according to a certain rule like a denby structure. Becomes La or Lb, and when knit and insertion are repeated in the course direction every course, the loop of the insertion part is also treated as a knit loop, and the loop of the knit loop, the loop of the insertion part, and the loop of the sinker loop 2 The length obtained by adding is La or Lb.
In the case of circular knitting, it means one unit that is repeated in the structure of the needle loop and sinker loop. For example, when knit and tack are repeated in every direction in the wale direction, the tack loop is also a needle loop, The sum of the tuck loop 1 loop is a needle loop of one unit, and the length obtained by adding the sinker loop 2 loop 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.

  When the warp direction is extended by 50%, the needle loop is mainly extended, and the sinker loop is little extended. On the other hand, when extending 50% in the weft direction, the sinker loop is generally extended and the needle loop is generally not extended. Therefore, the needle loop greatly contributes to the heat generation at the time of extension in the warp direction, and conversely, the sinker loop greatly contributes to the extension in the weft direction. When focusing only on each of these loops and taking out only the change amount of the needle loop at the time of La and Lb measurement, the change amount of the needle loop at the time of 50% elongation in the warp direction is 1.1 to 1 compared with that before the elongation. .6 times is preferable, and the amount of change in the sinker loop at the time of 50% elongation in the weft direction is preferably 1.8 to 4.0 times that before the elongation. In this case, the amount of change is larger than the amount of stretch of the knitted fabric. Naturally, the sinker loop becomes longer due to the stretch, but in the stretchable weft knitted fabric of the present invention, the needle loop portion is stretched. In many cases, the needle loop part is not easily stretched in the weft direction, and the sinker loop is stretched more than the stretch amount of the knitted fabric. As a result, the change of the sinker loop is larger than the stretch amount of the knitted fabric. The amount increases.

  In the knitted fabric according to the present invention, in order to set the change ratio Lb / La of the loop length to 1.15 ≦ Lb / La ≦ 1.65, in the warp knitting, the runner length, the change of the sinker shape, and the adjustment of the knockover depth, In circular knitting, it is possible to reduce the curvature and meandering of the elastic yarn by adjusting the stitch length (loop length), and also by controlling the density especially during dyeing. That is, the density of the knitting fabric machine is generally increased by the dyeing process, and is generally about 1.3 to 1.8 times higher than the density of the production machine. This is because the conventional general knitted fabric containing elastic yarn has a large purpose of imparting stretchability, and by increasing the density to this extent, a knitted fabric having good stretchability can be obtained. On the other hand, the first purpose of the knitted fabric of the present invention is to generate heat at the time of stretching, and the elastic yarn in the knitted fabric needs to be efficiently stretched when the knitted fabric is stretched. Therefore, it is necessary to set the elastic yarn of the knitted fabric after the dyeing process to be almost straight, and on the other hand, it is necessary to have excellent extensibility and a feeling of wearing. In order to finish to a coarse density rather than finish normally and not to reduce the extensibility too much, the raw machine may be knitted to a little coarse density.

  Regarding the knitted fabric of the present invention, as a result of studying the knitted fabric design that generates heat extensibility and has good stretchability and wearing feeling, the present inventors have found that the fineness ratio of the elastic yarn and the inelastic yarn is important. I found out. That is, even if the elastic yarn content is low, the elongation heat generation temperature is high depending on the combination with the non-elastic yarn, and conversely, even if the elastic yarn content is large, the elongation heat generation depends on the combination with the non-elastic yarn. There are combinations where the temperature is high and the knitted fabric stress is not too high, and the use of these elastic and inelastic yarns is important. After dyeing and finishing, by setting the fineness ratio of the elastic yarn structure constituting the knitted fabric in the product and the non-elastic yarn structure constituting the knitted fabric to 1.4 to 2.5, heat generation is suitably generated. It is possible to make a knitted fabric with good extensibility and wearing feeling. When the fineness ratio is less than 1.4, the knitted fabric becomes high power and difficult to move, and the fineness ratio is When the ratio is larger than 2.5, the texture becomes stiff and the clothes are hard to move, and the elongational heat generation temperature does not rise sufficiently.

In the present specification, the structure of the elastic yarn constituting the knitted fabric and the structure of the non-elastic yarn constituting the knitted fabric are defined as follows.
In the case of warp knitting, a structure in which a warp knitted fabric is constituted by a plurality of wrinkles, and a structure having the most neat loops for both elastic yarns and inelastic yarns, and when elastic yarns and inelastic yarns use a plurality of wrinkles However, when using a plurality of folds, each of the knitted loops has a structure with the most knitted loops due to the thickest elastic yarn folds. In this case, the fineness is measured separately for each tissue having the most knit loops due to the thinnest inelastic yarns.
For example, in the case of a three-ply structure, a cord structure of the front inelastic thread 54dt, a denby structure of the middle inelastic thread 33dt, and an atlas structure of the back elastic thread 33dt, it is used as the elastic yarn structure constituting the warp knitted fabric. The fiber used is 33 dt, and the fiber used in the inelastic yarn structure constituting the warp knitted fabric is 33 dt.
In the case of circular knitting, the structure constituting the knitted fabric (the structure of each course shown in the knitting order) has the most knitted loops composed of elastic yarns and the most knitted loops composed of inelastic yarns. For each, measure the fineness separately. For example, the structure constituting the weft knitted fabric of the elastic yarn in FIG. 2 is the structure of the knitting order 1 or 3, and the structure constituting the weft knitted fabric of the non-elastic yarn is any of the knitting orders 1 to 4. Organization. The same applies when the inelastic yarn is a spun yarn. When the structure composed of elastic yarn or inelastic thread is composed of two or more kinds of yarns and has the same number of knit loops, the structure composed of the yarn with the smallest fineness is the structure constituting the weft knitted fabric To do. Furthermore, when the elastic yarn is a covered elastic yarn such as a covering yarn, a twisted yarn, or an injection-processed yarn, the fineness ratio between the elastic yarn and the inelastic yarn of the covered elastic yarn is obtained. When there are two or more types of inelastic yarns used in the coated elastic yarn, the fineness ratio between the thinnest inelastic yarn and the elastic yarn may be obtained. Furthermore, when there are two or more types of elastic yarns, the fineness ratio between the elastic yarns with the largest number of knit loops and the non-elastic yarns is determined. When there are two or more types of elastic yarns and the number of knit loops is the same, the thickest elasticity is obtained. The fineness ratio between the yarn and the inelastic yarn is determined.

  In the knitted fabric according to the present invention, the fineness ratio of the elastic yarn and the inelastic yarn is 1.4 to 2.5, but the fineness ratio of a normal warp knitted fabric is about 2.8 to 5.0, The knitted fabric of the present invention 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 normally knitted and finished, the texture is hard and the knitted fabric stress is high. It may be too much. Therefore, when producing the knitted fabric of the present invention, it is important to stretch the elastic yarn more than usual at the time of knitting so that the elastic yarn in the knitted fabric becomes apparently thin. It is preferable that the knitting is performed at a slightly lower density. Specifically, in comparison with normal knitted fabric, in the case of warp knitting, the number of inelastic yarn runners is increased by a few percent, the elastic yarn runner is shortened, and in the case of circular knitting, the inelastic yarn knitting length is several. It is preferable to increase the elongation percentage of the elastic yarn by increasing the length by%.

  Furthermore, it is preferable that the knitted fabric is slightly stretched more than usual at the time of dyeing. As a guideline, the knitted fabric density is set so that the density in the center of the fabric width (wale / inch) is set in the width direction during presetting. The density (course / inch) in the knitted fabric length direction is set to be approximately twice the density of the wale, and the exothermic temperature of the knitted fabric after dyeing and the stress at 80% elongation. Temporarily evaluate the stress ratio, etc., and set the density conditions for finishing. For example, conditions are set by provisional evaluation, such as decreasing the density when the exothermic temperature is less than 1 ° C., increasing the density when the stress is high, and increasing the heating set condition when the stress ratio is high. These methods also give a coarser density than a normal knitted fabric, and as a result, the elastic yarn content is slightly reduced, but the elastic yarn in the knitted fabric remains stretched. When comparing the fineness of the elastic yarn and the fineness of the elastic yarn after the dyeing process, the fineness of the elastic yarn after the dyeing process is equal to the fineness of the original yarn or a few percent thinner than that. In the knitted fabric of the present invention, when the fineness of the elastic yarn raw yarn and the fineness after dyeing are compared, the elastic yarn becomes thin by about 10 to 20% after dyeing, and the knitted fabric has a small decrease in elongation heat generation temperature. The stress can be lowered. Furthermore, what is important during dyeing is that the elastic yarn in the knitted fabric is set while the knitted fabric is stretched by increasing the heat treatment conditions such as increasing the set temperature and lengthening the set time during heat setting. Is as thin as possible. In addition, as a guideline for setting these knitted fabrics by stretching, the knitted fabric elongation under a 9.8N load of the knitted fabric sampled to an initial length of 10.0 cm and a width of 2.5 cm is within 150% at the maximum. It is preferable to set so that.

The method for obtaining the fineness ratio of the yarn according to the present invention is obtained by the ratio of the cross-sectional areas of the elastic yarn and the inelastic yarn. The cross-sectional area is determined by observing the cross-sections of the inelastic yarn and elastic yarn in the tissue constituting the knitted fabric to be measured. For each cross-sectional area, in the case of multifilaments, the sum of the number of filaments is inelastic. The value obtained separately for the yarn and the elastic yarn is defined as the fineness. 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 portion and the sinker loop portion, and the measurement is performed by changing the loop, and the average obtained from the cross-sections at 10 locations of the needle loop and the sinker loop is taken as the cross-sectional area and the fineness ratio. If the needle loop part and the sinker loop part are the same loop but are stretched, or there are loops with different shapes due to deformation, etc., in this case, measure at the most shaped part of the knitted fabric. , The following 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 knitted fabric and garment of the present invention have good heat followability with wear as well as stretching heat generation, and are intended to have a good wearing feeling without being out of shape. In addition to the content, stress ratio, fineness ratio, Lb / La, etc., in order to particularly improve the movement followability, the warp direction and the weft direction elongation stress at the time of 80% elongation of the knitted fabric are 3.0 to 6.0N is preferable. If the elongation stress is less than 3.0N, the knitted fabric stress is too low and the movement followability is insufficient, and the shape tends to lose its shape. If it is larger than 6.0N, the movement is difficult and the wearing feeling is not excellent. For this reason, the warp direction and the weft direction elongation stress at 80% elongation of the knitted fabric should be 3.0 to 6.0 N. For this reason, along with the fineness of the elastic yarn, the density ratio of the knitted fabric This can be achieved by limiting the number of loops of the knitted fabric.
As for the density ratio of the knitted fabric, the elongation balance between the knitted fabric warp direction and the knitted fabric weft direction is important in order to improve the movement followability, and in order to optimize the elongation balance, The following formula with directional density:
By setting the density ratio obtained by density ratio = (passage direction density (course / inch)) / (weft direction density (wale / inch)) to a specific range of 1.7 to 2.2, The balance with exercise tracking can be optimized. That is, the density ratio of ordinary knitted fabrics is often 1.6 or less, and in this application, it is particularly important to increase the density in the course direction (warp direction). If the density ratio is less than 1.7, the warp elongation is low, the followability of the movement is poor, and the wear becomes easy to lose shape or wear, and the density ratio is 2. When it is larger than 2, the warp direction or the weft direction is a knitted fabric that hardly generates heat and the object of the present application is not achieved. Therefore, the density ratio should be 1.7 to 2.2, more preferably 1.8 to 2.1. The obtained density ratio is obtained up to two decimal places, and the second digit is rounded off to obtain the density ratio.

  In the knitted fabric of the present invention, in addition to the density ratio, the number of loops, which is the product of the warp direction density (course / inch) of the knitted fabric and the weft direction density (wale / inch) of the knitted fabric, is also important. The balance between the exothermic heat generation and the stress of the knitted fabric can be optimized by entering within a specific range, that is, the number of loops is preferably within the range of 5000 to 12000, the content of elastic yarn, the elastic yarn and non-elasticity Even if the fineness ratio with the elastic yarn is within a specified range, the stretching heat generation temperature may be low, or the knitted fabric may be highly stressed. When the number of loops is more than 12,000, the knitted fabric is highly stressed and is difficult to move. Particularly, when the number of loops is less than 5000, the knitted fabric has a high feeling of tension and has high air permeability of the knitted fabric. In addition to the low exothermic temperature of the knitted fabric itself, the exothermic inflow of the outside air does not feel warm due to the high air permeability even when the exothermic heat is generated. From these, the number of loops is preferably 5000 to 12000, more preferably 5500 to 11500. The number of loops can be controlled by controlling the fineness ratio and knitting machine gauge as well as the quality control during dyeing. To increase the number of loops, the fineness ratio is reduced, the knitting machine gauge is dense, and the dyeing is performed. It is easy to achieve by making the knitted fabric wide by processing and chasing. In particular, it is preferable to design the knitted fabric to have a wal of 50 to 80 wal / inch. More importantly, when knitting elastic yarn, it is knitting with a shorter runner than usual, but if the runner is too short, troubles such as yarn breakage will occur, so the possible range Then you can shorten the runner.

The knitted fabric according to the present invention is a single circular knitting machine or a double circular knitting machine having a large diameter of about 30 to 40 inches with a 26 to 40 gauge multi-warp warp knitting machine and a 28 to 36 gauge circular knitting machine. Non-elastic yarns and elastic yarns manufactured by stockings knitting machines with a hook diameter of about 4 inches, small knitting machines with a hook diameter of 13-17 inches, circular knitting machines of about 26-40 gauge, and high gauge flat knitting machines In warp knitting, it can be knitted with a normal single tricot knitting machine, double tricot knitting machine, single raschel knitting machine or double raschel knitting machine, and the knitting structure can be knitted with a normal structure However, in the knitted fabric of the present invention, it is particularly preferable that the elastic yarn has an atlas structure. In particular, as the loop structure, an atlas structure having a loop of 50% or more in the atlas structure is more preferable. Preferably, all closed atlases are preferred.
The all-closed atlas structure is, for example, 10/21/23/12, 10/32/45/23, etc., and a normal atlas structure is a combination of a closed opening and an opening, and this loop structure is elongated. While it has excellent recoverability and a high stress ratio, it has a closed atlas structure, so that the strain of the loop is large when stretched and the stress ratio can be adjusted to 0.6 to 0.8. easy. In addition, when a knitted fabric having a stress ratio of 0.6 to 0.8 is manufactured with a normal atlas structure, the exothermic extensibility is excellent, but the movement followability is insufficient, By doing this, it was found that the instantaneous stretch recovery property that could not be captured by the stress ratio was excellent, and it was found that the stretch exothermic property and the motion following property were excellent even when the stress ratio was in the range of 0.6 to 0.8. In addition, about the structure | tissue of an inelastic thread | yarn, it can select arbitrarily with the opening or closing eyes of Denby, a cord, an atlas, etc.

In addition, weft knitting can be knitted with ordinary single circular knitting machines, double circular knitting machines, and high gauge flat knitting machines. The knitting structure can be knitted with ordinary structures. The course containing elastic yarn and the course of only non-elastic yarn are preferably arranged alternately in one complete knitting order. In the example of FIG. 2, the knitting orders 1 to 4 are one complete, the course containing the elastic yarn in the one knitting order is the knitting orders 1 and 3, and the course of only the inelastic yarn is the knitting order. 2 and 4, in the case of FIG. 2, the course containing these elastic yarns and the course containing only the inelastic yarn are alternately arranged. More preferably, the basic knitting structure is preferably smooth, whereby the elastic yarn loops are continuous in the knitted fabric even though the elastic yarns are alternately arranged one by one in the knitting order. The stress ratio becomes too high in the structure including the elastic yarn in all the courses, and the stress ratio becomes higher than 0.8. However, the stress ratio can be set to 0.6 to 0.8 by the present application structure. Furthermore, even when the stress ratio is within the range of the present invention, it can be seen that the elastic yarn loops are connected, and it is understood that it has excellent instantaneous stretch recovery that cannot be grasped by the stress ratio, excellent in exothermic heat generation, and motion tracking It was found that it becomes the wear which is excellent in.
The knitted fabric of the present invention has a high power portion and a low power that are partially different in power, such as dotted, linear, curved, etc., by changing the knitting structure, yarn usage, resin printing, etc. May be mixed. 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-strength exothermic knitted fabric only on the part that wants an exothermic heat effect, such as the knee, and a high-power constant stretch knitted fabric around the knee, etc. It becomes possible to make a product aimed at protecting the knee joint, etc., in the low extension part.

  The elastic yarn used in the knitted fabric of the present invention can be a polyurethane-based or polyether ester-based elastic yarn. For example, as the polyurethane-based elastic yarn, those obtained by dry spinning or melt spinning can be used. 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, fibers of about 20 to 80 dtex can be used, the knitted fabric is easy to manufacture, the elongation heat generation temperature is high, and the knitted fabric has good motion following properties. The use of elastic fibers is preferred. 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 knitted fabric of the present invention 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, Heat generation can be stored in titanium oxide, and heat retention by 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 term “inorganic substance” as used herein refers to ceramics such as titanium oxide, inorganic substances such as carbon and carbon black, and / or inorganic compounds, and is preferably finely powdered so as not to hinder spinning of elastic yarns. 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 knitted fabric of the present invention include a polyurethane-based elastic yarn and a polyether ester-based elastic yarn. There are methods for increasing the molecular weight of the elastic yarn in order to increase the elongation heat generation temperature. 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 alone or in combination of two or more, but if the addition amount is small, the elongation exothermic temperature effect is low, and conversely, if the addition amount is large, the knitted fabric stretch recovery is reduced, Since it becomes easy to lose shape due to wearing and washing, 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 shape of the fiber is not particularly limited, and crimped yarn such as raw yarn and false twist can be used. The thickness of the inelastic yarn is 20 to 110 dt, preferably 30 to 90 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 knitted fabric of the present invention, if a material that absorbs moisture and heat, 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 when exercised, thereby further 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 of the knitted fabric of the present invention, 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 a liquid dyeing machine, a wins dyeing machine, a paddle dyeing machine, etc. It is optional, and it is possible to use a processing agent that improves water absorption and flexibility and a processing agent that improves heat retention.

  Warp knitted fabric of the present invention includes sports such as spats, sports tights, compression tights, girdles, bottoms such as inners, underwear, sports shirts, compression shirts, tops, pantyhose, socks, tights, leggings, etc. Sewers, elbow supporters, knee supporters, waist supporters, ankle covers, arm covers, leg covers, knee covers, elbow covers, and other supporters, gloves, etc. If it does, it becomes warm clothes by daily movement and exercise.

In particular, compression wear and sports shirts, such as jogging, various games, walking, etc. are mainly worn close to the skin during exercise, such as long sleeves or short sleeves aimed at improving exercise function, preventing injury or keeping warm. sleeved shirt, on the knee, in the spats, etc. up to the knee or ankle, weight per unit area is made from 150~300g / m ² about of the knitted fabric, the elastic yarn 40~50g / m ² contain, and the elastic yarn and non-elastic yarn If the knitted fabric has a fineness ratio of 1.2 to 2.2 and a stress ratio of about 0.50 to 0.70, and this knitted fabric is used for joints such as elbows, knees, inseam, and ankles, it is particularly high. Since a heat generation effect is obtained, it is preferable to sew so that at least the knitted fabric of the present invention is used for these joint portions. In order to further enhance the joint protection effect, etc., it is possible to provide a portion with low elongation near the joint, and as a method for producing the low elongation portion, it is not stretched by chain stitch or insertion tissue during knitting of the knitted fabric There are a method, a method of combining tape-like objects which are difficult to stretch before sewing a product by sewing or adhesion, a method of fastening with a seam, and the like, and a function such as joint protection is added by these methods.

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 Basically, the following measurement is performed at random at several locations. However, in the case of a knitted fabric whose fabric performance is partially different depending on the knitting structure, yarn use, presence / absence of resin printing, etc., the performance of the present invention is used. When a satisfying portion cannot be confirmed, it is possible to preferentially measure a portion where the performance of the present invention is highly likely to be expressed, and it is sufficient to perform sampling in such a way that measurement in the longitudinal direction and the weft direction can be performed.
In a knitted fabric with uniform knitting structure, use of yarn, presence / absence of resin print, and the like, sampling locations may be random, and sampling may be performed so that measurement in the warp direction and the weft direction can be performed.

(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 graticule direction and the weft direction, and set the higher direction as the instantaneous heat generation temperature.
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: Set based on the knitted fabric elongation under a 9.8N load of a knitted fabric having a width of 2.5 cm. When the knitted fabric elongation is 100% or more, the elongation amount is 100% and the knitted fabric elongation is 60. The elongation amount in the case of% or more and less than 100% is the same as the elongation under a load of 9.8 N.
Repeated expansion and contraction cycle: 2 times / second Exothermic temperature measurement: Sample surface temperature is continuously measured by thermography during 100 times of repeated stretching and after completion of stretching. 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.
Elongation of knitted fabric: 100mm in length (excluding gripping part), 25mm in width using a Tensilon tensile tester (Orientec Co., Ltd. RTC-1210A), stretched under the following conditions, stretched under 9.8N load Measure the degree.
Initial load 0.01N
Tensile speed and recovery speed: 300 mm / min Tensile length: Elongation to 9.8 N load Measurement: Elongation under the above conditions, and determine the elongation in the warp direction and the latitudinal direction at 9.8 N load.

(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 dissolution or the like, 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, the elastic yarn is removed from the knitted fabric after the weight measurement by dissolving, etc., and the weight of only the non-elastic yarn is measured. To do.

(4) Stress ratio and stress at 80% elongation 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: 0.01N
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 forward path stress and the backward path stress at the time of 50% during the third expansion / contraction are determined and determined by the following formula. In the case of a knitted fabric with an elongation measured at the time of instantaneous heat generation temperature measurement of (1) of 60 to 80%, it stretches to 60%, and the outward stress and the backward stress at the time of 50% during expansion and contraction are obtained. Calculate by rounding off the third decimal place from the following formula. Further, the stress at the third 80% elongation is defined as elongation stress.
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))

(5) Knitting fabric sagability The movement following property was evaluated by the knitting fabric sagability described below.
Using a Dematcher fatigue tester (DC-3 type) manufactured by Daiei Kagaku Seiki Co., Ltd. shown in FIG. 3, a sample sampled 20 cm square is fixed to the sample fixing frame 1b on the fixed sample gripping portion 1a of the testing machine. Install on the testing machine. The height of the push-up round bar is adjusted so that the maximum push-up height of the push-up round bar 1d is 6 cm upward from the sample fixing frame 1b. Next, a high-speed camera “Himawari GE200” manufactured by Library Co., Ltd. is installed on a tripod at the sample fixing frame and the horizontal position, and at a position 20 cm from the front surface of the sample fixing frame.
The Dematcher fatigue tester is set to perform 500 push-up operations per minute, and the 500th push-up operation is photographed at 200 frames per second.
From the captured video, the point when the tip of the round bar passes the lower end of the sample fixing frame when the round bar descends after 500 push-up operations is set to 0, and the maximum sample sag from the sample fixing frame within 0.05 seconds from there. , Measured the length of the knitted fabric using the moving image analysis software "Move-tr / 2D" manufactured by Library Co., Ltd. Excellent.

[Example 1]
Using a 32-gauge single tricot knitting machine, using non-elastic polyester 56dtex / 36f on the front heel and elastic yarn 33dtex (trade name Roica SF: manufactured by Asahi Kasei Fibers Co., Ltd.) on the back, the elastic yarn shown below All organized in a closed Atlas organization.
Front 23/10
Back 10/21/23/12
The knitted fabric that had been knitted was relaxed and scoured with a continuous scouring machine, then pre-set at 190 ° C. for 90 seconds with the width of the green machine, and then dyed with a liquid dyeing machine. After dyeing, a polyester-based water-absorbing softening finish was applied, and a finishing set was carried out at 170 ° C. for 60 seconds at almost the same density as after dyeing to obtain a knitted fabric.
The results of evaluating the performance of the obtained knitted fabric are shown in Table 1 below. In the knitted fabric of the present invention of Example 1, the instantaneous exothermic temperature at the time of elongation was 1.0 ° C. or higher, and when it was made into a garment, it was possible to obtain a garment that was easy to move and excellent in motion following ability.

[Examples 2-5, Comparative Examples 1-2]
A knitted fabric (Example 2) in which the density of the elastic yarn is lowered by setting the density more coarsely than Example 1 (Example 2), and the knitted fabric in which the fineness of the elastic yarn and the inelastic yarn is changed (Examples 3 to 5, Comparative Example 1) A knitted fabric was prepared and evaluated in the same manner as in Example 1 except that the above steps were performed. In Comparative Example 1, in addition to the above changes, the presetting conditions were set to 185 ° C. for 60 seconds. The results are shown in Table 1 below.

[Example 6]
Using a 36-gauge single tricot knitting machine, using non-elastic polyester 56dtex / 36f for the front heel and elastic yarn 44dtex (trade name Roica SF: manufactured by Asahi Kasei Fibers Co., Ltd.) for the back, Organized by the Atlas organization.
Front 23/10
Back 10/32/45/23
The knitted fabric that had been knitted was relaxed and scoured with a continuous scouring machine, then pre-set at 190 ° C. for 90 seconds with the width of the green machine, and then dyed with a liquid dyeing machine. After dyeing, a polyester-based water-absorbing softening finish was applied, and a finishing set was carried out at 170 ° C. for 60 seconds at almost the same density as after dyeing to obtain a knitted fabric.
The results of evaluating the performance of the obtained knitted fabric are shown in Table 1 below. In the knitted fabric of the present invention of Example 1, the instantaneous exothermic temperature at the time of elongation was 1.0 ° C. or higher, and when it was made into a garment, it was possible to obtain a garment that was easy to move and excellent in motion following ability.

[Example 7]
Using a 28 gauge double circular knitting machine, inelastic yarn nylon 56dtex / 24f and elastic yarn 44dtex (trade name Roika SF: manufactured by Asahi Kasei Fibers Co., Ltd.) are used to place elastic yarn in the smooth structure shown in FIG. Knit by plating.

[Example 8]
Using a 32-gauge single tricot knitting machine, using non-elastic polyester 56dtex / 36f on the front heel and elastic yarn 33dtex (trade name Roica SF: manufactured by Asahi Kasei Fibers Co., Ltd.) on the back, the elastic yarn shown below Was knitted in an atlas structure with a closed loop of 50%.
Front 23/10
Back 10/12/23/21

[Example 9]
Using a 32 gauge double circular knitting machine, nonelastic yarn nylon 56dtex / 24f and elastic yarn 33dtex (trade name Roika SF: manufactured by Asahi Kasei Fibers Co., Ltd.) are used to play elastic yarn in all courses. Knitting was performed with a ding.
The knitted fabric that had been knitted was relaxed and scoured with a continuous scouring machine, then pre-set at 190 ° C. for 90 seconds with the width of the green machine, and then dyed with a liquid dyeing machine. After dyeing, a polyester-based water-absorbing softening finish was applied, and a finishing set was carried out at 170 ° C. for 60 seconds at almost the same density as after dyeing to obtain a knitted fabric.
The results of evaluating the performance of the obtained knitted fabric are shown in Table 1 below. In the knitted fabric of the present invention of Example 1, the instantaneous exothermic temperature at the time of elongation was 1.0 ° C. or more, and when it was made into a garment, it was possible to make a garment that was easy to move and excellent in movement following ability.

  The knitted fabric of the present invention is a knitted fabric that instantaneously rises in temperature when being worn, and this knitted fabric is made up of bottoms such as sports tights, spats, compression tights, girdles, underwear, shirts, compression shirts, etc. By sewing to leg coverings such as legs, pantyhose, socks, tights, leggings, knee supporters, elbow supporters, arm covers, leg covers, knee covers, elbow covers, gloves, etc. The knitted fabric generates heat during wearing exercise, and it is warm and excellent in the ability to follow the exercise.

FIG.
1 Needle loop (length) of inelastic thread
2 Inelastic thread needle loop start point 3 Inelastic thread needle loop end point 4 Elastic thread sinker loop (length)
5 Start point of elastic thread sinker loop 6 End point of elastic thread sinker loop 2
1-4 Order 3
1a Fixed sample gripping part 1b Sample fixing frame 1d Push-up round bar

Claims (7)

A knitted fabric composed of elastic yarns and inelastic yarns, wherein the elastic yarn content is 30 to 60 g / m ² , the warp knitted fabric is stretched to 80% after being stretched, and is stretched The following formula obtained from the forward stress and the backward stress at 50% of the following:
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
The stress ratio represented by the formula is 0.60 to 0.80, and the following formula of the warp direction density and the weft direction density:
Density ratio = (Wrong direction density (course / inch)) / (Weft direction density (Wale / inch)) is a density ratio of 1.7 to 2.2, and 80% elongation of the knitted fabric The knitted fabric characterized by having an elongation stress in a warp direction and a weft direction of 3.0 to 6.0 N, and an instantaneous exothermic temperature at the time of at least one direction of warp being 1.0 ° C. or more.   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 1.4 to 2.5. Knitted fabric. A length La obtained by adding the length of the sinker loop of the elastic yarn and the length of the needle loop of the inelastic yarn in one unit of the knitted structure when the knitted fabric is stretched by 30% in both directions of warp and warp, The ratio of the length of the sinker loop of the elastic yarn and the length of the needle loop of the inelastic yarn in one unit of the knitted fabric when stretched by 50% in any one direction = (Lb / La) is the following formula (1):
1.15 ≦ Lb / La ≦ 1.60 (1)
The knitted fabric according to claim 1 or 2, wherein:   The knitted fabric according to any one of claims 1 to 3, wherein the knitted fabric is a multi-warp warp knitted fabric, and the elastic yarn is knitted with an atlas structure.   The knitted fabric according to any one of claims 1 to 3, wherein the knitted fabric is a double circular knitted fabric, wherein a course containing elastic yarn and a course containing only inelastic yarn are alternately arranged in one complete knitting order. .   A garment comprising the knitted fabric according to any one of claims 1 to 5, being in close contact with a body and covering at least a joint part.   The garment according to claim 6, selected from the group consisting of bottoms, tops, legs, supporters and gloves.