JP2015094044A - Stretchable knitted fabric and garment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitted fabric that exhibits an instantaneous temperature rise when stretched, permanently evolves heat when stretched by stretching and contracting the knitted fabric repeatedly, enables a wearer to easily put on, and can be produced inexpensively.SOLUTION: A stretchable knitted fabric comprises: a stretchable yarn made of a latent crimp developing polyester fiber whose at least one component is polytrimethylene terephthalate; and a non-elastic yarn other than the stretchable yarn. The stretchable knitted fabric has a content of the stretchable yarn of 30 to 100 g/m. A filling rate of a fabric obtained by the following expression is 15 to 30%. A stress ratio (stress of a backward path (N))/(stress of a forward path (N))which is obtained from stress of a forward path and stress of a backward path at a point of 50% in the middle of stretching and contracting when the knitted fabric is returned to the original length after stretching up to 80% with respect to the original length is 0.40 to 0.80. An instantaneous exothermic temperature is 1.0°C or more when the knitted fabric is stretched in at least one of the warp and weft directions. Filling rate (%)=(M/L)÷(H1×K1+H2×K2+...Hn×Kn)×100.

Description

  The present invention relates to a knitted fabric containing stretchable yarn whose temperature rises instantaneously when stretched, and a garment made of the knitted fabric.

  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. (See, for example, 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 completely different heat generation function that generates heat when the knitted fabric is stretched during wearing (see, for example, Patent Documents 2 and 3 below).
However, these knitted fabrics are surely warm and warm when stretched, but because the elastic yarn content increases, the weight of the knitted fabric increases, resulting in heavy clothing, difficult to move, and the elastic yarn content. It tends to be expensive because there are many.

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

  The problem to be solved by the present invention is that, in a knitted fabric having stretchability, the temperature rises instantaneously at the time of stretching, and if the stretch of the knitted fabric is repeated, heat is generated continuously when stretched, and the heat generated by stretching is efficient. Achieved yet easy-to-move garments that can be manufactured at low cost, and by sewing the knitted fabrics on clothes such as innerwear and sportswear, heat retention, muscles and joints at stretched sites It is intended to provide a garment that can prevent injury due to warming and a fat burning effect.

As a result of intensive studies and experiments conducted to solve the above problems, the present inventor has found that an elastic yarn that is an inelastic yarn can be used to generate heat when the knitted fabric is stretched without using the heat generated by stretching the elastic yarn. The above-mentioned problem of the present invention can be achieved by making use of heat generated by friction between the yarn and the yarn by stretching the knitted fabric, and by making the content of the stretchable yarn and the like in an optimal range, In spite of not containing an elastic yarn, the present inventors have found that the instantaneous heat generation temperature at the time of elongation is 1.0 ° C. or higher, and have reached the present invention.
That is, the present invention is as follows.

[1] A stretchable knitted fabric comprising a stretchable yarn composed of a latently crimpable polyester fiber, at least one component of which is polytrimethylene terephthalate, and an inelastic yarn other than the stretchable yarn, and the content of the stretchable yarn Is 30 to 100 g / m ² , the knitted fabric filling rate obtained by the following formula is 15 to 30%, and the outgoing route at the time of 50% during expansion and contraction when the knitted fabric is stretched back to the original length after reaching 80%. The stress ratio between the stress and the return stress (return stress (N) / outward stress (N)) is 0.40 to 0.80, and the instantaneous exothermic temperature at least in one direction of extension is 1.0 ° C. or higher. Characteristic elastic knitted fabric.
Filling rate (%) = (M / L) ÷ (H1 × K1 + H2 × K2 + ·· Hn × Kn) × 100
(In the above formula, L is the thickness (cm) of the knitted fabric at a load of 6 g / cm ² measured with a KES compression tester, M is the weight per unit area of the knitted fabric (g / cm ² ), H1, H2,... Hn are the specific gravity of each of the fibers 1, 2, .. n contained in the knitted fabric, and K1, K2... Kn are the mixing ratio (%) of each of the fibers 1, 2, .. n contained in the knitted fabric. .)
[2] The knitted fabric is a weft knitted fabric, the tuck loop or the welt loop is 20 to 60% of all the loops in the knitted fabric, and satisfies the following conditions (a) and / or (b): The elastic knitted fabric according to [1] above, characterized in that.
(A) The tack loop or the welt loop is made of stretchable yarn.
(B) In a course in which the tuck loop or the welt loop is knitted, at least one of the knit loops before and after the tuck loop or the welt loop is made of stretchable yarn.
[3] The stretchable knitted fabric according to the above [1], wherein the knitted fabric is a warp knitted fabric, and at least the stretchable yarn is knitted with an opening.
[4] A garment comprising the knitted fabric according to any one of the above [1] to [3], being in close contact with the body and covering at least a joint part.
[5] The clothing according to [4], wherein the clothing is selected from the group consisting of bottoms, tops, legs, supporters, and gloves.

  The garment provided with the stretchable knitted fabric of the present invention is warm and heat-resistant when the knitted fabric is heated at a temperature of 1.0 ° C. or more due to bending and stretching of the knees and arms, and is light and easy to move. It is a garment having an effect of preventing injuries and an effect of burning fat by warming, and is manufactured at a lower cost.

An example of the knitting structure | tissue of the elastic knitted fabric of this invention is shown.

Hereinafter, the present invention will be described in detail.
In the present invention, as described above, in order to generate heat when the knitted fabric is stretched, the elastic yarn content is increased only by using the heat generated by stretching of the polyurethane-based or polyether ester-based elastic yarn, and it is heavy and difficult to move. As a result of intensive studies on how to reduce the heat generated by stretching the knitted fabric while reducing the weight of the garment, that is, the knitted fabric, the yarn by stretching the knitted fabric can The heat generated by friction between the yarn and the yarn may be used, and when the high elongation heat generation temperature obtained by the knitted fabric containing the elastic yarn is not required, the elastic yarn is not necessarily used by using a specific stretch yarn. Also found a good thing.

  In other words, it is known that heat is generated more greatly as a knitted fabric made of inelastic yarn (hereinafter, fibers other than the above-described stretchable yarn and elastic yarn are referred to as inelastic yarn) is elongated. As the amount increases, heat generation due to fiber stretching increases in addition to heat generation due to friction between the yarn and the yarn, and the elastic yarn recovers to its original length even if it is greatly stretched. The fiber itself is stretched and is distorted so that it does not return to its original length. Therefore, the present invention provides a latent amount in which at least one component is polytrimethylene terephthalate in order to sufficiently generate heat even in the stretched area where clothes are stretched, that is, the inelastic yarn is not stretched and the fibers are not distorted. It proposes that the frictional heat between the yarns can be utilized to the maximum by using stretchable yarns made of crimped polyester fiber. This makes it possible to reduce weight and cost, and to keep warm. It became possible to make clothes.

  In the present invention, the latent crimp-expressing polyester fiber (hereinafter, also simply referred to as stretch yarn in the present specification) is composed of at least two kinds of polyester components, and is preferably bonded to a side-by-side type or an eccentric sheath type. It develops crimps by heat treatment. The composite ratio and joint surface shape of the two polyester components are not particularly limited, and the composite ratio is preferably in the range of 70/30 to 30/70 by mass%, and the joint surface shape is preferably a straight or curved shape. is there. The total fineness is preferably 20 to 300 dtex and the single yarn fineness is preferably 0.5 to 20 dtex, but is not limited thereto.

  The latent crimp-expressing polyester fiber used in the present invention is characterized in that at least one component is polytrimethylene terephthalate. Specifically, the polyester fiber disclosed in JP-A-2001-40537 is used. Trimethylene terephthalate is one component. That is, a composite fiber in which two kinds of polyester polymers are joined in a side-by-side type or an eccentric core-sheath type, and in the case of a side-by-side type, the melt viscosity ratio of the two kinds of polyester polymers is preferably 1.00 to 2.00, In the case of the eccentric core-sheath type, the sheath polymer and the core polymer preferably have an alkali weight loss rate ratio that is 3 times or more faster than that of the sheath polymer. Specific polymer combinations include polytrimethylene terephthalate (polyester containing terephthalic acid as the main dicarboxylic acid and 1.3-propanediol as the main glycol component, glycols such as ethylene glycol and butanediol, and isophthalic acid. 2. Dicarboxylic acids such as 2.6-naphthalenedicarboxylic acid may be copolymerized, and other polymers, matting agents, flame retardants, antistatic agents, pigments and other additives may be included) Polyethylene terephthalate (polyester containing terephthalic acid as the main dicarboxylic acid and ethylene glycol as the main glycol component, copolymerized with glycols such as butanediol, isophthalic acid, and dicarboxylic acid such as 2.6-naphthalenedicarboxylic acid) Also, other polymers, matting agents, flame retardant , Polytrimethylene terephthalate and polybutylene terephthalate (terephthalic acid is the main dicarboxylic acid and 1.4-butanediol is the main glycol component) Yes, it may be copolymerized with glycols such as ethylene glycol, isophthalic acid, dicarboxylic acid such as 2.6-naphthalenedicarboxylic acid, and other polymers, matting agents, flame retardants, antistatic agents, pigments, etc. May be contained), and it is particularly preferable that polytrimethylene terephthalate is disposed inside the crimp.

  As described above, at least one of the polyester components constituting the latently crimpable polyester fiber used in the present invention is polytrimethylene terephthalate. Besides JP-A-2001-40537, JP-B-43-19108, JP-A-11-189923, JP-A-2000-239927, JP-A-2000-256918, JP-A-2000-328382 In Japanese Laid-Open Patent Publication No. 2001-81640, etc., the first component is polytrimethylene terephthalate, and the second component is polyester such as polytrimethylene terephthalate, polyethylene terephthalate, polybutylene terephthalate in parallel or eccentrically. Disclosed is a composite spun to an arranged side-by-side type or an eccentric sheath-core type. In particular, a combination of polytrimethylene terephthalate and copolymerized polytrimethylene terephthalate, or a combination of two types of polytrimethylene terephthalate having different intrinsic viscosities is preferable.

  Furthermore, in the present invention, the initial crimp resistance of the latently crimpable polyester fiber is preferably 10 to 30 cN / dtex, more preferably 20 to 30 cN / dtex, and particularly preferably 20 to 27 cN / dtex. In addition, it is difficult to manufacture a material having a density of less than 10 cN / dtex. Further, the expansion / contraction elongation rate of the actual crimp is preferably 10 to 100%, more preferably 10 to 80%, and particularly preferably 10 to 60%. Further, the elastic modulus of the actual crimp is preferably 80 to 100%, more preferably 85 to 100%, and particularly preferably 85 to 97%.

  Further, the heat shrinkage stress at 100 ° C. is preferably 0.1 to 0.5 cN / dtex, more preferably 0.1 to 0.4 cN / dtex, particularly preferably 0.1 to 0.3 cN / dtex. It is. The heat shrinkage stress at 100 ° C. is an important requirement for developing crimps in the fabric refining and dyeing processes. That is, in order to overcome the binding force of the fabric and develop crimp, it is preferable that the heat shrinkage stress at 100 ° C. is 0.1 cN / dtex or more.

  The expansion / contraction elongation after the hot water treatment is preferably 100 to 250%, more preferably 150 to 250%, and particularly preferably 180 to 250%. The stretch elastic modulus after the hot water treatment is preferably 90 to 100%, more preferably 95 to 100%.

Examples of the latently crimpable polyester fiber having the above-described characteristics include a composite fiber composed of a single yarn in which two types of polytrimethylene terephthalate having different intrinsic viscosities are combined in a side-by-side manner.
The difference in intrinsic viscosity between the two types of polytrimethylene terephthalate is preferably 0.05 to 0.50 (dl / g), more preferably 0.1 to 0.45 (dl / g), and particularly preferably 0. .15 to 0.45 (dl / g). For example, when the intrinsic viscosity on the high viscosity side is selected from 0.7 to 1.3 (dl / g), the intrinsic viscosity on the low viscosity side is selected from 0.5 to 1.1 (dl / g). Is preferred. The intrinsic viscosity on the low viscosity side is preferably 0.8 (dl / g) or more, more preferably 0.85 to 1.0 (dl / g), particularly preferably 0.9 to 1.0 (dl / g). g).

In addition, the intrinsic viscosity of the composite fiber itself, that is, the average intrinsic viscosity is preferably 0.7 to 1.2 (dl / g), and more preferably 0.8 to 1.2 (dl / g). In particular, 0.85 to 1.15 (dl / g) is preferable, and 0.9 to 1.1 (dl / g) is most preferable.
In addition, the value of the intrinsic viscosity as used in the present invention refers to the viscosity of the yarn being spun, not the polymer used. The reason for this is that polytrimethylene terephthalate has a disadvantage inherent to thermal decomposition as compared with polyethylene terephthalate and the like, and even if a polymer with a high intrinsic viscosity is used, the intrinsic viscosity is significantly reduced by thermal decomposition. This is because it is difficult to maintain a large difference in intrinsic viscosity between the two.

  Here, the polytrimethylene terephthalate is a polyester having a trimethylene terephthalate unit as a main repeating unit, and the trimethylene terephthalate unit is about 50 mol% or more, preferably 70 mol% or more, more preferably 80 mol% or more, particularly Preferably, it means 90 mol% or more. Accordingly, the total amount of the other acid component and / or glycol component as the third component is less than about 50 mol%, preferably less than 30 mol%, more preferably less than 20 mol%, particularly preferably less than 10 mol%. And polytrimethylene terephthalate contained in

  Polytrimethylene terephthalate is synthesized by combining terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this synthesis process, an appropriate one or two or more third components may be added to form a copolyester, or polyester other than polytrimethylene terephthalate such as polyethylene terephthalate and polybutylene terephthalate, nylon, etc. may be separately added. It may be blended after being synthesized. The content of polytrimethylene terephthalate in blending is 50% or more by mass%.

  The third component to be added includes aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexanedicarboxylic acid, etc.), aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.), fat Aliphatic glycols (ethylene glycol, 1,2-propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexanedimethanol, etc.), aliphatic glycols containing aromatics (1,4-bis (β-hydroxyethoxy) benzene Etc.), polyether glycol (polyethylene glycol, polypropylene glycol etc.), aliphatic oxycarboxylic acid (ω-oxycaproic acid etc.), aromatic oxycarboxylic acid (P-oxybenzoic acid etc.) and the like. A compound having one or three or more ester-forming functional groups (such as benzoic acid or glycerin) can also be used within the range where the polymer is substantially linear.

  In addition, matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, easy lubricants such as aerosil, antioxidants such as hindered phenol derivatives, difficulty A flame retardant, antistatic agent, pigment, fluorescent whitening agent, infrared absorber, antifoaming agent, and the like may be contained.

  In the present invention, spinning of latently crimpable polyester fibers is disclosed in, for example, the above-mentioned various patent publications. For example, after obtaining an undrawn yarn at a winding speed of 3000 m / min or less, 2-3. A method of twisting at about 5 times is preferable, but a straight-rolling method (spin draw method) in which the spinning-twisting process is directly connected, and a high-speed spinning method (spin take-up method) with a winding speed of 5000 m / min or more are adopted. Also good.

  Further, the form of the fiber may be long fiber or short fiber, and may be uniform or thick in the length direction, and the cross-section is round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped. Type, eight leaf type, flat type (with flatness of about 1.3-4, W type, I type, boomerang type, wave type, skewer type, eyebrows type, rectangular parallelepiped type, etc.), dog It may be a polygonal shape such as a bone shape, a multileaf shape, a hollow shape or an irregular shape.

  Furthermore, as the form of the yarn, a spun yarn such as a ring spun yarn, an open-end spun yarn, a multifilament yarn (including ultrafine yarn) having a single yarn denier of about 0.1 to 5 denier, a sweet twisted yarn to a strongly twisted yarn, Examples include false twisted yarn (including POY drawn false twisted yarn), air-jet processed yarn, indented yarn, and knitted knitted yarn.

  In addition, within the range which does not impair the object of the present invention, usually within the range of 50% by weight or less, other fibers such as natural fibers and synthetic fibers, for example, natural fibers such as cotton, wool, hemp and silk, cupra, viscose, Cellulosic fibers such as polynosic, purified cellulose, and acetate, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, and polytrimethylene terephthalate, various synthetic fibers such as polyurethane, nylon, and acrylic, and their copolymer types and similar Or mixed fibers (side-by-side type, eccentric sheath core type, etc.) using different polymers are blended (core yarn, silo span, silofill, hollow spindle, etc.), covering (single, double), for example, boiling water shrinkage of about 3-10% Low shrinkage yarn or high shrinkage yarn, for example, about 15-30% boiling water shrinkage Of intermingling and 交撚, false twisting (twist elongation difference tentative composite or the like in the draw texturing of the POY), or may be used together with 2 feed air blasting, etc. means.

  Non-elastic yarns used in the present invention include polyester fibers such as polyethylene terephthalate, ordinary polytrimethylene terephthalate, polyamide fibers, and polyolefin fibers such as polypropylene, and cellulose such as cupra, rayon, cotton, bamboo fibers, etc. All kinds of fibers can be used such as system fibers and animal hair fibers such as wool. 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. The thickness of the inelastic yarn is preferably 20 to 110 dtex, and more preferably 30 to 90 dtex. 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 particular, when the inelastic yarn used in the present invention is a polyester fiber, a polyamide fiber, or a cellulose fiber, it is preferable to contain 0.3 to 5% by weight of an inorganic substance. By containing an inorganic substance, the heat retention effect can be more effectively exhibited 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 elastic knitted fabric of the present invention, if a material that absorbs moisture such as cellulose is used for the non-elastic yarn, it generates heat by absorbing moisture when worn, and also generates heat by exercising, thereby enhancing the effects of the present invention. It 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.

The stretchable knitted fabric of the present invention is a stretchable knitted fabric using stretch yarns. In a weft knitted fabric, a single circular knitting machine or a double circular knitting machine having a large diameter of about 30 to 40 inches, a hook diameter 4 It consists of inelastic yarns and stretchable yarns produced by a 26 to 40 gauge round knitting machine such as an inch stocking knitting machine and a small knitting machine with a hook diameter of 13 to 17 inches, and a high gauge flat knitting machine. It is a weft knitted fabric, and a warp knitted fabric is a warp knitted fabric composed of inelastic yarns and stretchable yarns manufactured by a 26 to 40 gauge multiple warp knitting machine. These knitted fabrics are designed so that the stretch yarn content is 30 to 100 g / m ² and the knitted fabric filling rate is 15 to 30%. In particular, the elongation heat generation can be achieved by utilizing the friction between the yarns in the knitted fabric, so that a high elongation heat generation temperature can be obtained. Therefore, the knitted fabric filling rate is important. In particular, the friction between the yarns is preferable. The knitted fabric filling rate referred to in the present invention refers to the volume occupied by the fiber in the volume formed by connecting the outside of the fabric with a straight line. If the knitted fabric filling rate is less than 15%, it is caused by friction between the yarn and the yarn. Heat generation is small, and conversely, when the knitted fabric filling rate increases, it becomes a knitted fabric that does not stretch easily, and when the knitted fabric filling rate exceeds 30%, it becomes a knitted fabric that hardly stretches. When processed, it becomes a garment that is difficult to move when worn. Therefore, the filling rate of the knitted fabric is 15 to 30%, more preferably 18 to 28%.

  In order to increase the frictional heat between yarns, use of processed yarn such as false twist, use of spun yarn, use of twisted yarn, use of mixed fiber of two or more types of fibers, use of coated elastic yarn For example, when the friction on the fiber surface is larger, the frictional heat between the yarns becomes higher. Therefore, when the knitted fabric filling rate is low, the use of these fibers may be considered.

The knitted fabric filling rate is determined by measuring the basis weight and thickness of the knitted fabric in an environment of a standard state (20 ° C. and 65% RH), and obtaining the knitted fabric filling rate by the following formula.
Filling rate (%) = (M / L) ÷ (H1 × K1 + H2 × K2 + ·· Hn × Kn) × 100
In the above equation, L is the thickness (cm) of the knitted fabric at a load of 6 g / cm ² measured with a KES compression tester, M is the weight per unit area (g / cm ² ) of the knitted fabric, and H1 , H2 ·· Hn are the specific gravity of each of the fibers 1, 2, ·· n in the knitted fabric, and K1, K2 ·· Kn are the mixing ratio (%) of each of the fibers 1, 2, ·· n in the knitted fabric. As for the specific gravity of the fiber, the specific gravity of the fiber according to the Fiber Handbook (Maruzen) is used, the intermediate value is used for the fiber having a wide specific gravity, and the mixing rate of the knitted fabric is, for example, 80%. Uses 0.80. The filling rate is expressed as an integer by rounding off the first decimal place of the obtained numerical value.

The stretch yarn content in the knitted fabric of the present invention is 30 to 100 g / m ² , preferably 40 to 90 g / m ² . When the stretchable yarn content is less than 30 g / m ² , a high elongation heat generation temperature cannot be obtained even if the friction between the yarn in the knitted fabric is large. On the other hand, when the stretch yarn content is more than 100 g / m ² , when processed into a garment, the garment is difficult to stretch and difficult to move, so the object of the present invention cannot be achieved.

Furthermore, as a result of studying the knitted fabric design that generates more heat for the stretchable knitted fabric of the present invention, the present inventor found that the purpose is based on the stress ratio of the stretch knitted fabric measured by the method described later in addition to the content of the stretchable yarn. It was found that can be achieved.
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. 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 0.40, the heat generation at the time of elongation is high. However, when the garment is used, it is preferable that the knitted fabric is deformed after bending the elbow and knee joints and the garment is deformed. Furthermore, if the stress ratio is too high, the extensional heat generation temperature itself becomes low. Therefore, the stress ratio is preferably 0.45 to 0.75, and more preferably 0.45 to 0.70. When the stress ratio is different between the warp direction and the weft direction, it is preferable that both directions are within the above range, but the stress can be within the above range only in the direction in which the extension heat generation performance is desired, In this case, when the garment is sewn and worn, the direction in which the knitted fabric is stretched by the operation is preferably within the above range. The stress ratio is controlled by the content of stretchable yarn, the stress ratio of the stretchable yarn itself (reciprocal stress performance ratio at 50% stretch at 80% stretch of stretchable yarn), the fineness ratio between stretchable and inelastic yarn, knitting The stress ratio can be controlled by the ground filling rate and the slidability of the knitted fabric.

  As an example of controlling the stress ratio, in order to reduce the stress ratio, the fineness ratio between the stretchable yarn and the inelastic yarn (the fineness of the inelastic yarn / the fineness of the stretchable yarn) is set to 0.7 to 2.0. There are methods such as the use of yarn, spun yarn or composite yarn, production of knitted fabric using stretch yarn with a small stress ratio, and further increase the filling rate of the knitted fabric, and control of the stress ratio by finishing. 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, for example, a polyester-based finishing agent or a method of finishing without using a finishing agent. What is necessary is just to select 1 or more types according to the target knitted fabric which it is going to manufacture from these methods.

The stress ratio as used in the present invention is that the knitted fabric is stretched to 80% and then returned to the original length, and the forward stress and the return stress at the time of 50% during the expansion and contraction are obtained. Calculate by rounding off.
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
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.

  Note that the stress ratio is obtained from the stress at the time of elongation and recovery 50% because the stress ratio at the time of 50% easily captures the difference between the temperature at which heat is generated when the knitted fabric is stretched and the temperature at which heat is absorbed at the time of recovery from elongation. It is because it found out. In other words, the smaller the stress ratio, the lower the endothermic temperature when the elastic yarn is stretched and relaxed, and a higher elongation heat generation temperature is obtained. It becomes possible to do.

  The elastic knitted fabric of the present invention is characterized in that the instantaneous exothermic temperature at the time of elongation in at least one direction is 1.0 ° C. or higher. In the present invention, the instantaneous exothermic temperature is energy from the outside in addition to expansion / contraction. Under the condition that there is no supply and the exothermic temperature of the wind does not change, the stretch of the knitted fabric is stretched by 60 to 100%, and then the process of returning to the original length once relaxed is repeated 100 times. The maximum temperature indicated by the knitted fabric is measured by thermography, and is a value calculated from the difference from the knitted fabric temperature before the start of the test.

  When the knitted fabric temperature becomes higher than the knitted fabric temperature before the start of the test during 100 times of 60 to 100% expansion or contraction, it indicates that instantaneous heat generation has occurred. The knitted fabric of the present invention needs 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 heat generation temperature is higher, and the upper limit is not particularly limited as long as it does not adversely affect the human body, but in order to increase the instantaneous heat generation temperature, the knitted fabric such as increasing the friction between the yarn and the yarn If the heat generation temperature becomes too high by design, the knitted fabric becomes high power and it becomes difficult to move as a garment, so the instantaneous heat generation temperature is preferably 10 ° C. or less. Further, 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. For knitted fabrics of 0 ° C or higher, there is no need to take into account the direction of mold insertion when sewing products. However, in the case of knitted fabrics that generate heat instantaneously in only one direction, the direction in which the skin stretches is particularly large at the joints of the human body. Can be made to match the direction of the knitted fabric where the instantaneous heat generation is large, it is possible to produce warm clothes during exercise.

  In addition, the elongation amount setting at the time of measuring the exothermic temperature is set by the knitted fabric elongation under a 9.8N 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. In this case, 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 a load of 9.8 N, for example, 9 When the elongation of the knitted fabric under 80 N load is 80%, the stretch amount 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 when it is processed into clothes, it is not suitable for clothes that are in close contact with the skin because the feeling of tension when wearing clothes is too strong to move. The measurement method of the knitted fabric under a load of 9.8 N and the measurement method of the heat generation temperature will be specifically described in the following examples.

  Conventional knitted fabrics containing elastic yarns give the knitted fabric elasticity and give a comfortable fit when wearing clothes, which makes it possible to obtain slim aesthetic clothing and improve motor function. It was something to do. On the other hand, the present invention obtains a knitted fabric that generates heat by expansion and contraction, and is a knitted fabric of 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 higher, the content of stretch yarn, the knitted fabric filling rate, the fineness ratio between stretch yarn and inelastic yarn, the number of loops, the stress of the knitted fabric It is important to set the ratio and the like within an appropriate 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 heat generation by extension. According to the present invention, for the first time, a knitted fabric having an instantaneous heat generation temperature of 1.0 ° C. or higher when stretched by 60 to 100% is obtained, and when worn as a garment, the stretch amount of the human joint when worn is only 30 to 50%. High heat is generated even when stretched, and the heat can be felt when worn.

  In the elastic knitted fabric of the present invention, in addition to the knitted fabric filling rate and the stress ratio, the knitted fabric is a product of the warp direction density (course / inch) of the knitted fabric and the weft direction density (wale / inch) of the knitted fabric. The number of loops is also important. By keeping the number of loops within a specific range, the balance between the heat generated by extension and the stress of the knitted fabric can be optimized. When the stretch knitted fabric according to the present invention is a weft knitted fabric, the number of loops is preferably in the range of 3000 to 8000. If the number of loops is less than 3000, the knitted fabric has a low degree of elongation, and the elongation heat generation temperature is low. When the number is more than 8000, the knitted fabric is highly stressed, and when it is used as a garment, it is difficult to move. In particular, when the number of loops is less than 3000, there is a high feeling of tension when the garment is used, and the air permeability of the knitted fabric may be increased. However, there is a lot of inflow of outside air because it is highly breathable, so it doesn't feel warm. From these, the number of loops is preferably 3000 to 8000, more preferably 3500 to 7500. The number of loops can be controlled by controlling the amount of fineness and the knitting machine's gauge as well as the amount of dye during dyeing. To increase the number of loops, the fineness can be reduced, the knitting machine gauge can be dense, It is easy to achieve by putting the knitted fabric into the width and driving it. In particular, it is preferable to design the knitted fabric to have a waling of 40 to 70 wales / inch. Further, more importantly, when knitting the stretchable yarn, it is knitted shorter than the normal knitting length. The knitting method of the stretchable yarn and the inelastic yarn is preferably plating (attachment yarn knitting) or loop formation with only the stretchable yarn. In this case, for example, one stretchable yarn and one inelastic yarn are alternately arranged. It can be knitted by knitting.

  When the stretch knitted fabric according to the present invention is a warp knitted fabric, the number of loops is preferably in the range of 5000 to 12000. If the number of loops is less than 5000, the knitted fabric has a low degree of elongation, and the elongation heat generation temperature is low. When the number is more than 12,000, the knitted fabric has high stress, and when it is used as a garment, the garment is difficult to move. In particular, when the number of loops is less than 5,000, there is a high feeling of tension when used as a garment, and the air permeability of the knitted fabric may be increased. However, there is a lot of inflow of outside air because it is highly breathable, so it doesn't feel warm. 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 amount of fineness and the knitting machine's gauge as well as the amount of dye during dyeing. To increase the number of loops, the fineness can be reduced, the knitting machine gauge can be dense, It is easy to achieve by putting the knitted fabric into the width and driving it. In particular, the knitted fabric is preferably designed to have a waling of 50 to 80 wales / inch. In addition, the knitting of the stretchable yarn is preferably knitted separately from the non-elastic yarn, but the stretchable yarn and the non-elastic yarn can be arranged with the same heel, for example, every other stretch yarn and the non-elastic yarn are knitted. A method such as arranging an elastic yarn can also be performed.

  In the production of the stretchable knitted fabric of the present invention, it is preferable that the stretchable knitted fabric is finished to be more stretched than usual at the time of dyeing. Thereby, although the elongation of the knitted fabric is lowered, when the knitted fabric is pulled, the knitted fabric loop is less deformed and the friction between the yarn and the yarn can be maximized. In addition, as a guideline for setting these knitted fabrics by stretching, the knitted fabric elongation under a 9.8N load of a 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.

  In the case of a weft knitted fabric, the stretch knitted fabric of the present invention can be manufactured by a single circular knitting machine or a double circular knitting machine including a tubular knitting machine such as a pantyhose knitting machine, and a small-sized shuttle knitting machine. The organization can be knitted by a knitting loop-based knitting organization such as a tengu organization or a smooth organization. In the case of a smooth structure, it is preferable to knitting by stretching (attaching yarn) an elastic yarn and an inelastic yarn. In order to make the smooth structure easy to move during the wearing operation, the elastic yarn is plated. The purpose can be achieved by performing a method such as plating for every course, instead of performing for all courses. In order to further enhance the stretching heat generation effect, the tuck loop and the welt loop (also referred to as a misloop but referred to as the welt loop in this application) are further arranged in the knitted fabric. Since it becomes high, it is preferable. Regarding the usage of tack loops and welt loops, forming the tuck loop or the welt loop with stretch yarn is the most effective for stretching heat generation. However, the tack loop or the welt loop is an inelastic yarn, and the tack loop or the welt loop is used. It is also possible to form at least one knit loop before and after the loop with elastic yarns, and further form a tuck loop or a welt loop with the elastic yarn, and at least one knit loop before and after the tuck loop or the welt loop. If it is formed of stretch yarn, a high elongation heat generation temperature can be obtained. In any case, a loop in which the stretch yarn is stretched is formed, and the elongation heat generation temperature can be increased, and a preferable loop structure is obtained. In addition, as these tuck loops and welt loops increase, the elongation tends to decrease and the knitted fabric tends to be difficult to stretch. Therefore, the tuck loop or the welt loop is continuously organized in the course direction (knitting warp direction). It is preferably within 2 courses, and if 3 or more courses are continued, the knitted fabric elongation is extremely lowered, and should be avoided except for the purpose of low elongation. Therefore, it is preferable that the tuck loop or the welt loop be continuous within two courses, but in this case, the combination of the tuck loop and the welt loop is preferably continuous within two courses. The continuation of the tuck loop or the welt loop is within 2 courses, but the continuation in the oblique direction is not limited, and the continuation in the wale direction (the weft direction) is also not limited, and it is possible to continue within the knitting range It is. Further, the tack loop or the welt loop may be plating with stretchable yarns and inelastic yarns or knitting with only stretchable yarns.

  In addition, it is preferable that the tuck loop or the welt loop is organized in the knitted fabric, but these tuck loops or the welt loop may be organized alone or in combination. A tissue in which loops or welt loops are arranged alternately or in arbitrary repeating units, or a tissue in which knit loops and tack loops or welt loops are arranged alternately or in arbitrary repeating units in the course direction can be used.

  Regarding the ratio of the knit loop to the tuck loop and / or the welt loop in the knitted fabric, at least the number of tuck loops and / or the welt loops on one side of the knitted fabric is 20 to 60% of the total number of loops on the surface of the knitted fabric. adjust. If the tuck loop and / or the welt loop is less than 20%, the stretch heat generation effect is small and the knitted fabric is difficult to generate heat. It is not preferable because it is difficult to move. Accordingly, the ratio of the tack loop and / or the welt loop is 20 to 60%, preferably 25 to 50%. In addition, the ratio of the tack loop and / or the welt loop in the knitted fabric is calculated from the number of loops of the knit loop, the tack loop, and the welt loop in one complete knitted structure. Of course, it is possible to design the knitted fabric with only the knit loop occupying a large area and the tuck loop or the welt loop being incorporated in the stripe or island shape. In this case, since the exothermic temperature at the knit loop portion is low, the knit loop portion may be arranged as a product so that a tuck loop or a welt loop is formed in a stretchable part such as a knee or an elbow.

  In the case of a double circular knitting machine, it is important that these tack loops and / or welt loops are arranged in at least one of the structures of the cylinder and the dial, and the cylinder and the dial are independent of each other. Judging by the loop shape organized on each side. In addition, the tack loop and / or the welt loop are preferably formed of both stretchable and inelastic yarns, but may be formed of only stretchable yarns or inelastic yarns.

  When the stretch knitted fabric according to the present invention is a warp knitted fabric, it can be knitted by a normal single tricot knitting machine, a double tricot knitting machine, a single raschel knitting machine, or a double raschel knitting machine. Although knitting is possible, the continuous insertion tissue is preferably 2 courses or less. In particular, it is preferable to form a knit loop with an opening in a stretchable yarn structure by a single tricot knitting machine or a single raschel knitting machine, and this enables efficient heat generation during a wearing operation. As examples of the opening structure, it is preferable that all knit loops such as 01/21, 01/32, 01/12/32, and the like have an opening. In addition, although these opening is preferable about an elastic thread, about an inelastic thread, an opening, a closing eye, the combination of an opening and a closing eye, etc. can be selected arbitrarily.

  The stretch knitted fabric of the present invention has a high power portion that is partially different in power, such as a dotted shape, a straight shape, a curved shape, etc. by changing the knitting structure, yarn use, or applying a resin print or the like. You may mix a low 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-strength exothermic knitted fabric only on the part that wants an exothermic heat effect such as the knee, and a high-power, low-extension 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.

  As the dyeing finishing method of the stretch knitted fabric of the present invention, a normal dyeing finishing process can be used, and dyeing conditions according to the fiber material used are used, and the dyeing machine used is also a liquid dyeing machine, a wins dyeing machine, and paddle dyeing. A processing agent that improves water absorption and flexibility and a processing agent that improves heat retention can also be used.

  The elastic knitted fabric of the present invention includes sports such as spats, sports tights, compression tights, girdles, bottoms such as inners, underwear, sports shirts, tops such as compression shirts, pantyhose, socks, tights, leggings, etc. Legs, elbow supporters, knee supporters, waist supporters, ankle covers, arm covers, leg covers, knee covers, elbow covers and other supporters, gloves, etc., sewn on clothes that cover joints where the knitted fabric is stretched during wearing movement If it does, it becomes warm clothes by daily movement and exercise.

In particular, compression wear and compression shirts, i.e. 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 the knitted fabric, a stretch yarn 40~100g / m ² containing, 20 is knitted fabric filling rate If you use a knitted fabric with 30% and a stress ratio of about 0.50 to 0.80, and use this knitted fabric for joints such as elbows, knees, inseam, ankles, etc., these joints have a particularly high heat generation effect. It is preferable to sew so that at least the knitted fabric of the present invention is used for the part. In order to enhance the joint protection effect etc., it is also possible to provide a low elongation part in the vicinity of the joint part. As a manufacturing method of the low elongation part, a method of preventing the structure from stretching at the time of knitting, sewing the product There are a method of combining tape-like objects that are difficult to stretch before by stitching or adhesion, a method of fastening with a seam, and the like, and a function such as joint protection is added by these methods.

Thin leg garments such as tights, leggings, socks, circular knitting machines with a hook diameter of about 24-38 inches, small round knitting machines with about 8-20 inches, pantyhose knitting machines, socks knitting machines with about 4 inches Even in bottom apparel manufactured by a circular knitting machine such as the above, if the stretchable weft knitted fabric of the present invention is used, it becomes a warm garment due to daily operations and exercises. Furthermore, if the knitted fabric contains 40-80 g / m ^{2 of} stretch yarn, the knitted fabric filling rate is 15-25%, and the stress ratio is about 0.40-0.60, it is excellent in heat retention as a bottom garment. It is effective in preventing injuries caused by warming muscles and joints at the extension site. In the case of these products, it is also possible to provide a low-elongation part near the joint for the purpose of joint protection, hip-up, etc. There are a method of making it difficult to stretch, a method of combining hard-to-extend tape-like materials by stitching or adhesion, a method of fastening with a seam, etc., and these methods add functions such as joint protection and hip-up.

Furthermore, thin inners such as underwear can be manufactured with a circular knitting machine with a hook diameter of about 24-38 inches and a small round knitting machine with a diameter of about 8-20 inches, and are worn as clothes by applying the knitted fabric of the present invention. If it does, it becomes warm clothes by daily operation. Furthermore, if the knitted fabric contains 30 to 70 g / m ^{2 of} stretch yarn, the knitted fabric filling rate is 15 to 20%, and the stress ratio is about 0.40 to 0.50, it is easy to move as an underwear and keeps warm. In particular, when combined with a heat-generating material such as a moisture-absorbing heat-generating material, an undergarment that is warm even when it does not operate and becomes warmer by operation can be obtained.

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, use of yarn, presence / absence of resin print, etc., the performance of the present invention is achieved. 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, yarn use, resin printing, and the like, the sampling location may be random, and sampling may be performed so that each measurement in the warp direction and the weft direction can be performed.

(2) Instantaneous exothermic temperature 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 repetitive stretching 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 by the knitted fabric elongation under a load of 9.8 N of a 2.5 cm width knitted fabric. 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: 0.1N
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.
When the knitted fabric has an elongation of less than 60%, no exothermic heat is generated. Therefore, the evaluation of the exothermic heat in the examples is indicated by x.

(3) Stretch yarn content Obtain the stretch yarn content (g / m ² ) in the stretch knitted fabric by the following method, and round off to one decimal place.
The stretchable and inelastic yarns are extracted by unraveling the knitted fabric of a predetermined area, the weight of the stretchable yarn is measured, the stretchable yarn content is obtained, and converted to the weight per unit area. In the case of a knitted fabric that is difficult to unravel, such as warp knitted fabric, the area to be unwound is reduced, or if there is a solvent that dissolves the non-elastic yarn and does not dissolve the stretch yarn, remove the non-elastic yarn of the knitted fabric of the predetermined area. It melt | dissolves, calculates | requires the weight of an elastic thread, and converts into the weight per unit area.

(4) Knitted fabric filling rate The knitted fabric filling rate was calculated by the following formula.
Filling rate (%) = (M / L) ÷ (H1 × K1 + H2 × K2 + ·· Hn × Kn) × 100
In the above equation, L is the thickness (cm) of the knitted fabric at a load of 6 g / cm ² measured with a KES compression tester, M is the weight per unit area (g / cm ² ) of the knitted fabric, and H1 , H2 ·· Hn are the specific gravity of each of the fibers 1, 2, ·· n in the knitted fabric, and K1, K2 ·· Kn are the mixing ratio (%) of each of the fibers 1, 2, ·· n in the knitted fabric. As for the specific gravity of the fiber, the specific gravity of the fiber according to the Fiber Handbook (Maruzen) is used, the intermediate value is used for the fiber having a wide specific gravity, and the mixing rate of the knitted fabric is, for example, 80%. Uses 0.80. The filling rate is expressed as an integer by rounding off the first decimal place of the obtained numerical value.

(5) 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 forward stress and the backward stress at the time of 50% during the second expansion / contraction are obtained, and the third decimal place is rounded off by the following formula.
Stress ratio = (Return stress at 50% (N)) / (Outward stress at 50% (N))
In the case of a knitted fabric having an elongation of 60 to 80% measured at the time of measuring the instantaneous heat generation temperature in (2) above, the stretching up to 60% stretching is repeated three times without stretching up to 80% stretching.

[Reference Example: Manufacture of latent crimped polyester fiber (stretch yarn)]
Two types of polytrimethylene terephthalate having different intrinsic viscosities were extruded into a side-by-side mold at a ratio of 1: 1 to obtain an undrawn yarn at a spinning temperature of 265 ° C. and a spinning speed of 1500 m / min. Next, the hot roll temperature is set to 55 ° C., the hot plate temperature is set to 140 ° C., the stretching speed is set to 400 m / min, the stretching ratio is set so that the fineness after stretching is set to 56 dtex, and then the side-by-side type composite multi-fiber of 56 dtex / 12f A filament was obtained. Similarly, side-by-side composite multifilaments of 33 dtex / 7f and 84 dtex / 18f were obtained.

[Example 1]
A 56 dtex / 12f side-by-side composite multifilament obtained as a stretchable yarn in a reference example was used to knitting a normal scalloped structure partially including the tack structure shown in FIG. The polyester 1 heater processed yarn of 56 dtex / 36f was used as the inelastic yarn, and these were knitted by plating.
The knitted fabric was relaxed and scoured with a continuous scouring machine, then pre-set at 170 ° C. for 60 seconds with a width of almost raw machine, and then dyed with a liquid dyeing machine. After dyeing, a polyester-based water-absorbing softening finish was applied, and finishing set was performed at 150 ° C. for 60 seconds at the same density as that 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 the garment easy to move.

[Examples 2 to 5, Comparative Example 1]
A knitted fabric (Example 2) in which the density of the knitted fabric is lowered by setting the density more coarsely than that of Example 1 with reference to Example 1 (Example 2), the fineness of the stretchable yarn is changed, and the knitting conditions are changed accordingly. Ground (Examples 3 and 4), knitted fabric with a wider density set than Example 3 (Comparative Example 1), knitted fabric obtained by plating knitting stretch yarns in all courses in Example 1 (Example 5) It was created.
The results of evaluating the performance of the obtained knitted fabric are shown in Table 1 below.

[Example 6]
When knitting a smooth structure using a 28 gauge double circular knitting machine, the 56dtex / 12f side-by-side composite multifilament obtained in the reference example as a stretchable yarn and the polyester 1 heater processing of 56dtex / 36f as an inelastic yarn These were knitted by plating knitting using yarn.
The knitted fabric was relaxed and scoured with a continuous scouring machine, then pre-set at 170 ° C. for 60 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 finishing set was performed at 150 ° C. for 60 seconds at the same density as that 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 6, the instantaneous exothermic temperature at the time of elongation was 1.0 ° C. or more, and when it was used as a garment, The clothes were easy to move.

[Example 7]
Using a 28-gauge single tricot knitting machine, using 56dtex / 36f polyester yarn as an inelastic yarn for the front heel and 56dtex / 12f side-by-side composite multifilament obtained as a reference yarn for the back heel Then, it was knitted with the half structure shown below.
Funtund 01/32
Back 21/01
The knitted fabric was relaxed and scoured with a continuous scouring machine, then pre-set at 170 ° C. for 60 seconds with a width of almost raw machine, and then dyed with a liquid dyeing machine. After dyeing, a polyester-based water-absorbing softening finish was applied, and finishing set was performed at 150 ° C. for 60 seconds at the same density as that 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 7, the instantaneous exothermic temperature at the time of elongation was 1.0 ° C. or higher, and when it was made into clothes, it was possible to make clothes easy to move.

[Comparative Example 2]
In Example 7, a knitted fabric with a short runner and a high filling rate was prepared. The results of evaluating the performance of the obtained knitted fabric are shown in Table 1 below.

  The elastic knitted fabric of the present invention is a knitted fabric whose temperature rises instantaneously when stretched during wearing operation, and this knitted fabric is a bottom such as sports tights, spats, compression tights, girdles, underwear, shirts, compression shirts, etc. Tops such as panties, pantyhose, socks, tights, leggings, etc., and knee supporters, elbow supporters, arm covers, leg covers, knee covers, elbow cover supporters, gloves, etc. By sewing, the knitted fabric generates heat during the wearing exercise, and the clothes become easy to move and warm.

  1 to 6 show the order.

Claims (5)

A stretchable knitted fabric comprising a stretchable yarn composed of a latently crimpable polyester fiber, at least one component of which is polytrimethylene terephthalate, and an inelastic yarn other than the stretchable yarn, and the content of the stretchable yarn is 30 to 30 100 g / m ² , knitted fabric filling rate calculated by the following formula is 15-30%, outward stress and return path at 50% during expansion / contraction when the knitted fabric is stretched back to the original length after 80% The stress ratio of stress (return stress (N) / outward stress (N)) is 0.40 to 0.80, and the instantaneous exothermic temperature during elongation in at least one direction is 1.0 ° C. or higher. Elastic knitted fabric.
Filling rate (%) = (M / L) ÷ (H1 × K1 + H2 × K2 + ·· Hn × Kn) × 100
(In the above formula, L is the thickness (cm) of the knitted fabric at a load of 6 g / cm ² measured with a KES compression tester, M is the weight per unit area of the knitted fabric (g / cm ² ), H1, H2,... Hn are the specific gravity of each of the fibers 1, 2, .. n contained in the knitted fabric, and K1, K2, .. Kn are the mixing ratio (%) of each of the fibers 1, 2, .. n contained in the knitted fabric. .) The knitted fabric is a weft knitted fabric, and the tuck loop or the welt loop is 20 to 60% of all the loops in the knitted fabric, and satisfies the following conditions (a) and / or (b): The stretch knitted fabric according to claim 1.
(A) The tack loop or the welt loop is made of stretchable yarn.
(B) In a course in which the tuck loop or the welt loop is knitted, at least one of the knit loops before and after the tuck loop or the welt loop is made of stretchable yarn.   The elastic knitted fabric according to claim 1, wherein the knitted fabric is a warp knitted fabric, and at least the elastic yarn is knitted with an opening.   A garment comprising the knitted fabric according to any one of claims 1 to 3, being in close contact with a body and covering at least a joint part.   The garment according to claim 4, wherein the garment is selected from the group consisting of bottoms, tops, legs, supporters and gloves.

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