JP6533662B2 - Leg wear - Google Patents

Description

  The present invention relates to leg wear. More specifically, the present invention comprises a knit knitted with a coated elastic yarn obtained by winding a nonelastic yarn around a polyurethane elastic yarn, or with a nonelastic yarn and a polyurethane elastic fiber, and is easy to wear and move. The present invention relates to a leg wear which is excellent in comfort and wear.

  Conventionally, a knitted fabric containing an elastic yarn is often used as leg wear such as pantyhose and tights, and various products are sold. Generally, leg wear is made with a pantyhose knitting machine, and although its construction stretches well in the latitudinal direction, its stretch in the warp direction is considerably smaller than that in the latitudinal direction. When the skin stretches in the longitudinal direction like bending, it is difficult to follow and slips off easily, and when the skin stretches in the latitudinal direction when the force is applied to the leg muscles, etc., when the fabric stretches in the latitudinal direction There is a problem that the contraction force in the longitudinal direction works and it becomes easy to slip off.

  In addition, when swelling and contraction of muscles of the calf and thighs are repeated during walking or the like, in the conventional knitted fabric, there is a problem that the change in the applied pressure is large and causes fatigue. Patent Document 1 below proposes a tights in which a portion with high elasticity and a portion with low elasticity is arranged in order not to impair the motility, but because it does not follow the stretching of the skin, it is easy to move The difficulty of falling off was not enough.

Unexamined-Japanese-Patent No. 2004-232157

  SUMMARY OF THE INVENTION In view of the above-described problems of the prior art, the problem to be solved by the present invention is to provide a leg wear which is excellent in ease of wearing, ease of movement, and comfort.

MEANS TO SOLVE THE PROBLEM As a result of earnestly examining and repeating experiments, the present inventors discover that the said subject is solvable by the following structure, and came to complete this invention.
That is, the present invention is as follows.

[1] A polyurethane elastic yarn comprising a non-elastic yarn wrapped around a non-elastic yarn, or a non-elastic yarn and a polyurethane elastic fiber knitted at least at least a calf, a knee, and a thigh Legwear, wherein the ratio of the stretching force in the warp direction / stretching force in the weft direction is 0.6 to 1 at least 30% stretched in the warp direction and in the weft direction from the wearing condition, at least in the calf region. a .7, and state, and are the direction and history average wear state load retention after repeated three times each 30% elongation and recovery in the weft direction 85% or more over the worn state, and wear the calf portion Said leg wear characterized in that the ratio of the density in the longitudinal direction to the density in the lateral direction in the state is 1.5 to 2.5 .

  [2] The leg wear according to the above [1], wherein in the calf portion, the opening angle of the fiber bundle constituting the knitted loop of the coated elastic yarn or the inelastic yarn is in the range of 60 to 140 degrees.

  [3] In the leg wear including the knee, the ratio of the stretching force in the warp direction / stretching force in the weft direction is 0.6 to 1.7 in a state of being stretched by 30% each in the warp direction and the weft direction from the wearing state. Yes, and it is described in the above [1] or [2], wherein the average of the wear condition load retention after 85% of elongation and recovery repeated in the warp and weft directions from the wear condition is 85% or more Leg wear.

  [4] The leg wear according to the above [3], wherein in the knee portion, the opening angle of the fiber bundle constituting the knitted loop of the coated elastic yarn or inelastic yarn is in the range of 60 to 140 degrees.

  [5] The leg wear according to any one of the above [1] to [4], which is any of pantyhose, stocking, tights, leggings or gator.

  The leg wear of the present invention is easy to stretch in the warp and latitudinal directions of the calf part, so it will follow the movement of the skin in the warp direction (head-foot direction) and will not slip off easily. In addition, the leg wear of the present invention has a shrinking force to follow the stretch of the skin even when the skin stretches in the latitudinal direction (horizontal direction) when force is applied to the leg muscles. Hard to work, hard to slip off. Furthermore, since the leg wear of the present invention causes swelling and contraction of muscles of the calf and thigh during walking and the like, there is almost no change in applied pressure, so it is difficult to be fatigued.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a fabric sag (instantaneous recovery) measurement tester. It is a magnified picture instead of drawing of the fabric surface explaining the measuring method of the opening angle of the fiber bundle which comprises the knitting loop of inelastic yarn.

Hereinafter, embodiments of the present invention will be described in detail.
The leg wear of this embodiment can be used for pantyhose, stockings above and below knees, tights, leggings, gators, and the like. The leg wear of the present embodiment is a cross-knitted type in which the leg portion is formed by alternately knitting a non-elastic yarn and a coated elastic yarn in which the non-elastic yarn is wound around the elastic yarn. In each case, polyurethane yarn of 10 to 310 dtex, preferably 15 to 160 dtex is used as an elastic fiber, and 5 to 84 dtex, preferably 5 to 56 dtex of a non-elastic yarn for coating. Filament yarns such as polyamide fibers, polyester fibers, natural or regenerated cellulose fibers, crimped yarns such as these wooly yarns, mixed yarns, and spun yarns can be used.
Here, the term "leg" refers to the groin (upper end of the thigh) from the heel. The pantyhose and the tights are such that the leg and the foot are connected, and the panty and the leg are composed of the leg and the foot, and the one composed of the leg and the foot. In addition, those covering the entire leg, those covering a part of the leg (for example, from the heel to the knee, from the heel to the knee, and the like) and the like can be mentioned. Furthermore, there are also configurations (leggings, gators) that do not have feet.

  In the case of the knitted type, the material of the non-elastic yarn to be alternately knitted with the coated elastic yarn, the fineness is also not particularly limited, but polyamide fiber, polyester fiber, natural or regenerated cellulose fiber of 5 to 170 dtex, preferably 7 to 110 dtex. And crimped yarns such as these wooly yarns, mixed yarns and spun yarns. Polyamide-based fibers are soft, hygroscopic, and have good touch, and therefore, polyamide-based fibers may be used alone or as mixed fibers or spun yarns from the viewpoints of strength, touch, and muzzle prevention as these inelastic yarns. preferable. Among the Zokki type and the knitting type, the Zokki type is more preferable from the viewpoint of stretchability.

  The leg wear of this embodiment is a knitted fabric knitted using a coated elastic yarn obtained by winding a non-elastic yarn around a polyurethane elastic yarn, or using a non-elastic yarn and a polyurethane elastic fiber, and includes at least a calf portion. A legwear having a ratio of a stretching force in the warp direction / stretching force in the weft direction of 0.6 to 1.7 in a state of being stretched by 30% each in the warp direction and in the weft direction from at least a calf part. Yes, and the process average of the wearing condition load retention after repeating 30% elongation and recovery three times each from the wearing condition in the warp direction and in the weft direction (the retention rate after stretching and recovery in the warp direction and in the weft direction It is characterized in that the average value of the retention rate after extension and recovery is 85% or more. Preferably it is 88% or more.

In the calf region, the ratio of the stretching force in the warp direction / stretching force in the weft direction in a state of being stretched by 30% each in the warp direction and the weft direction from the wearing state is preferably 0.7 to 1.5. it can.
The ratio of the stretching force in the warp direction / stretching force in the weft direction at 30% stretching in the warp direction and in the weft direction from the wearing condition, and the wearing condition load retention after repeated 30% stretching and recovery , Measure by the following method.
The position of the center of the calf in the wearing condition of the leg wear of this embodiment is the result of the wearing test, and in the case of a product including from the foot to the base of the foot, when the leg wear is placed flat, the foot to the base of the foot It is located 45% from the foot side of the length. The position of the center of the calf is 25% from the ankle side in the case of products including ankles to the groin, and 80% from the toes in the case of a stock under the knee.

  Here, in the "wearing condition", in the M size, the length from the foot of the human body to the base of the leg is 95 cm, so in the case of a product including from the foot to the base of the foot, the product was placed flat Assuming that the length from the toe of the foot to the position corresponding to the base of the leg is x cm, it is in a state of being stretched by (95 / x) × 100 (%) in the longitudinal direction (transverse direction). Assuming that the circumferential diameter of the calf portion of the human body is 34 cm, assuming that the circumferential diameter in the width direction (latitude direction) of the position corresponding to the calf portion when the product is placed flat is ycm (34 / y) x 100 (%) It corresponds to a state in which it is expanded. In the case of products that include ankles and groins, the “wear condition” is similar to the case where the length direction of the leg of the human body is 65 cm, and in the case of stockings under the knee, the length of the human body from the foot to under the knee is 60 cm. Calculate to In the L size, the length and circumference of the human body are respectively increased by 5%, and in the S size, it is decreased by 5%.

Using a Kato Tech 2 axis extension tester or equivalent 2 axis extension tester, the calf portion of the leg wear is extended so as to be in the “wear state”, and the load in the longitudinal direction at that time is read. Then, repeat 30% elongation in the warp direction (maintain the wearing condition in the weft direction), and repeat recovery three times (to the wearing condition), 30% with the longitudinal load at the first 30% elongation, and 30% Elongation (the latitudinal direction maintains the wearing condition) · After repeating the recovery three times, the longitudinal load in the wearing condition is determined.
After determining the weft load in the calf wearing state using another sample of the same leg wear, extension in the latitudinal direction (the warping direction maintains the wearing state) and recovery (to the wearing state) are repeated three times, The load in the weft direction at the time of 30% extension in the first time and the load in the direction of wear in the worn state after repeated elongation recovery are determined.

  The ratio of the stretching force in the warp direction / stretching force in the weft direction is 30% of the first warp direction load and 30% of the first weft direction load. It is determined by the ratio. In addition, the wearing condition load retention rate after repeated elongation recovery is determined by the ratio of the wearing condition load after stretching recovery repetition to the wearing condition load before stretching recovery repetition, and the retention rate during longitudinal elongation and the retention rate during weft direction elongation The average value of

In the leg wear of this embodiment, when the ratio of the stretching force in the warp direction to the stretching force in the weft direction at the calf part is 0.6 to 1.7, when worn, for example, the skin passes through like knee bending. Even in the case of stretching in the direction, it follows the leg wear which is hard to slip off.
Further, in the leg wear of this embodiment, even when the skin stretches in the latitudinal direction, for example, when force is applied to the leg muscles, the knitted fabric shrinks in the transversal direction in order to follow the skin stretch. It is hard to work the force, it is difficult to slip off leg wear.
Furthermore, in the leg wear of this embodiment, even if swelling and contraction of the muscles of the calves and thighs are repeated during walking etc. When the ratio is 0.6 to 1.7, there is almost no change in the pressure applied to the gastrocnemius muscle, which is the calf muscle, and the leg wear is resistant to fatigue. If the ratio of the stretching force in the longitudinal direction / the stretching force in the weft direction is less than 0.6 or greater than 1.7, it is difficult to follow the movement of the skin, so it is likely to be slipped off and it may be uncomfortable. In addition, since the change in pressure applied to the muscles is also large, fatigue may easily occur, which is not preferable.

If the background average of the wearing condition load retention after 30% elongation and recovery 3 times is less than 85%, the applied pressure decreases after stretching of the knitted fabric occurs by wearing, and the legwear tends to sag, In addition, it is not preferable because slippage also easily occurs.
In the leg wear including the knee portion of the present embodiment, also in the knee portion where the skin is greatly stretched and shrunk during walking etc., as in the case of the calf portion, when it is extended by 30% from the wearing state respectively in the transversal direction and the latitudinal direction The ratio of the stretching force in the direction / stretching force in the latitudinal direction is 0.6 to 1.7, and the background average of the wearing condition load retention after repeating 30% stretching and recovery 3 times is 85% or more Is preferred. Also in the knee portion, it is particularly preferable that the ratio of the stretching force in the warp direction to the stretching force in the weft direction is 0.7 to 1.5.

The position of the knee in the wearing state of the leg wear is 60% from the foot side of the length of the foot to the foot base in the case of a product including from the foot to the foot base when the leg wear is placed flat. In the position of. In the case of the product including the ankle to the groin, the position of the knee is 45% from the ankle side.
When extending in the wearing state, the knee length direction (transverse direction) is in the same state as the calvaris, and in the width direction, the circumference of the knees of the human body is 35 cm. Assuming that the length in the width direction (latitude direction) is y cm, it is in a state of being stretched to (35 / y) × 100 (%).

  The ratio of the stretching force in the warp direction / stretching force in the weft direction is 0.6 to 1.7 when the knee portion is stretched by 30% in the warp direction and in the weft direction from the wearing state, similarly to the calf part. And it is especially effective for the slippage fall prevention at the time of wear that the process average of the wearing condition load retention after repetition of 30% elongation and recovery 3 times is 85% or more.

  In the quadriceps femoris muscle used for walking etc., the thigh with the lateral broad muscle, the buttocks used in the movement of the toes, and the buttocks used in the standing motion, as with the calf and knees, It is preferable that the ratio of the stretching force in the direction / stretching force in the weft direction is 0.6 to 1.7. The ratio of longitudinal extension force / latitude extension force is preferably 0.7 to 1.5 at any site. Also in the thighs, buttocks and buttocks, it is preferable that the average of the wear condition load retention after repeated 30% elongation / recovery 3 times is 85% or more.

The position of the thigh in the worn state of the leg wear is 80 from the foot side relative to the length of the foot base in the case of a product including from the foot to the foot base when the leg wear is placed flat. It is located in%. In the case of a product that includes the ankle to the groin, the position of the thigh is 65% from the ankle side.
When extending in the worn state, the length direction (transverse direction) of the thigh is the same as that of the calf, and in the width direction, the circumference of the thigh of the human body is 45 cm. Assuming that the length in the width direction (latitude direction) is y cm, it is in the state of (45 / y) × 100 (%) extended.

The position of the buttocks in the worn state of the leg wear is 20% from the toe side with respect to the length of the toe from the toe in the case of a product including from the toe to the toe when the leg wear is placed flat. Position. The position of the buttocks is 35% from the toe in the case of the stockings under the knee.
When extending in the wearing state, the length direction (longitudinal direction) of the buttocks is the same as that of the calf, and the circumferential direction of the buttocks of the human body is 30 cm, so the width direction of the buttocks Assuming that the length in the (latitude direction) is y cm, it is in a state of (30 / y) × 100 (%) extended.

  In the leg wear of the present embodiment, in the calf region, the stretching force in the warp direction and the weft direction is preferably 100 cN to 600 cN when stretched 30% each in the warp direction and the weft direction from the wearing state. Is 100 cN to 500 cN, more preferably 100 cN to 300 cN. If the stretching force is less than 100 cN, the fit may be poor and the stretch recovery may be poor. On the other hand, if the stretching force exceeds 600 cN, the stretching force may be too large, which may make the user feel stiff when exercising.

  In the leg wear of this embodiment, also in the knee portion, it is preferable that the stretching force in the warp direction and the weft direction is 100 cN to 600 cN when stretched 30% each in the warp direction and the weft direction from the wearing state. Preferably it is 100 cN-500 cN, More preferably, it is 100 cN-300 cN.

  In the leg wear of this embodiment, the stretching force in the warp direction and the weft direction is 100 cN to 600 cN when the thigh, buttocks and buttocks are each stretched by 30% in the warp and weft directions from the wearing condition. It is preferably 100 cN to 500 cN, more preferably 100 cN to 300 cN.

In order to obtain these extension characteristics, in the design of the leg wear, the braiding length of the yarn is set in a predetermined range, and the number of courses of the knitted fabric is set 10-30% longer than usual, and driven in the direction during setting. Is preferred. "To drive" means to increase the density in the longitudinal direction. The braiding length is the position of each part, the yarn of 100 wales is extracted, and in the suspended state, the length of the yarn when a load of 1/10 (g) of the fineness is applied is measured. The calf portion is 270 mm ± 15 mm, A range of 320 mm ± 20 mm for the knee and 350 mm ± 20 mm for the thigh is preferred.
Deviation and fit during actual wear are greatly affected by the stretch recovery rate of the knitted fabric, but in order for the knit fabric to follow the actual movement of the human body, instantaneous recoverability after stretch is important.
The instantaneous recoverability is measured by the following method. A schematic of the testing machine is shown in FIG. A sample fixing frame of a sample sampled in a size of 20 cm square according to the wearing condition of the calf in the fixed sample holding part 1a of the testing machine using a Deatcher fatigue tester (DC-3 type) manufactured by Daiei Kagaku Seiki Co., Ltd. Fix it to 1b and install it on the tester. Further, the push-up round rod 1d is installed in the movable sample gripping portion 1c of the same tester. The height of the push-up rod is adjusted so that the maximum push-up height of the push-up rod 1d is 6 cm upward from the sample fixing frame 1b. The maximum push-up height of the push-up bar is set so that the sample at the maximum push-up is extended by about 50%.

A high speed camera "Himawari GE200" manufactured by Library Co., Ltd. is installed at a position of 20 cm from the front of the sample fixing frame using a tripod and horizontal to the sample fixing frame. The Deatcher fatigue tester is set to perform 500 thrusting operations per minute, and is operated, and the 500th thrusting operation is photographed under the condition of 200 frames per second. From the captured video, assuming that the point when the tip of the round bar passes the lower end of the sample fixing frame when the round bar descends 500 times after the pushing up operation is 0, the maximum sample sag from the sample fixing frame within 0.05 seconds from that point Measure using motion analysis software "Move-tr / 2D" manufactured by Library Co., Ltd.
The less the sample sag at this time, the better the instantaneous recovery and the better the follow-up during exercise. The maximum sample sag after 500 times of pushing up is preferably 3.0 mm or less, more preferably 2.0 mm or less.

  In order to make the above-mentioned momentary recovery good, the ratio of the stretching force in the warp direction / stretching force in the weft direction at the time of stretching 30% each in the warp direction and the weft direction from the wearing state in the calves is 0.6. At the same time, it is necessary that the mean of the wear state load retention after 85% of repeated elongation and recovery 3 times be at least 85%.

  In the leg wear of this embodiment, it is preferable that the opening angle of the fiber bundle constituting the knitted loop of the covering elastic yarn or the inelastic yarn at least in the calf region is in the range of 60 to 140 degrees. The angle is more preferably 70 to 130 degrees, further preferably 80 to 120 degrees. The opening angle of the fiber bundle constituting the knitted loop of the inelastic fiber is less than 60 degrees, and when it exceeds 140 degrees, the elongation balance between the warp direction and the weft direction becomes poor, and when worn, the skin It may not be easy to move without following the growth of the The opening angle is preferably 60 to 140 degrees, more preferably 70 to 130 degrees, and still more preferably 80 to 120 degrees not only for the calf but also for the knee. Further, the opening angle of the thighs is preferably 60 to 140 degrees, more preferably 70 to 130 degrees, and still more preferably 80 to 120 degrees.

In the present specification, the terms "the opening angle of the fiber bundle constituting the knitted loop of the coated elastic yarn or inelastic yarn" or "the inclination of the knitted loop of the coated elastic yarn or inelastic yarn" And draw a line at the center of the upper left fiber bundle constituting the knitting loop as shown in FIG. 2 (D), and similarly draw a line at the center of the upper right fiber bundle constituting the knitting loop (E) The narrow angles (angles) (F) of the (D) line and the (E) line are measured at a total of 10 locations at different places, and the average value is obtained.
When two or more types of coated elastic yarns and non-elastic fibers are used, it is preferable that the above-mentioned opening angle falls within the predetermined range in all the non-elastic fibers.

In the leg wear of this embodiment, the ratio of the density in the warp direction to the density in the weft direction in the wearing condition of the calf portion is preferably in the range of 1.5 to 2.5, and more preferably 1.7 to 2. 1, more preferably 1.8 to 2.0. The ratio of the density in the longitudinal direction to the density in the latitudinal direction is less than 1.5, and when it exceeds 2.5, the balance of the elongation in the warp direction and the latitudinal direction becomes poor and it becomes difficult to move when worn There are times when
In the present specification, the term "ratio of density in the longitudinal direction to density in the latitudinal direction" means the density in the warp direction (number of courses) and the density in the weft direction (Wale number) in the wearing state of the calf section described above. -Measure the number of courses and the number of wales in the section of 25.4 mm described in "density of knitted fabric" of -L-1096, 8.6.
Density ratio = (density in warp direction: number of courses) ÷ (density in weft direction: number of wales)
Is the value obtained by

Further, in the leg wear of this embodiment, the wear strength is preferably LM or more, more preferably M grade or more. When the wear resistance is less than L-M, when worn repeatedly, fuzz may frequently occur on the surface of the knitted fabric, and the pilling property may be deteriorated or torn.
In the present specification, the term "abrasion resistance" is a value evaluated by the C method of the abrasion resistance evaluation described in JIS-L-1076, 8.1.3.

  As a knitting structure of a leg part and a foot part in leg wear of this embodiment, although it is preferred that it is pimp and non-run knitting, it is not limited to this. In particular, silk-woven knitting is preferred because of its high elongation.

In the present specification, the term "draft length ratio of coated elastic yarn and non-elastic yarn (draft)" means that 100 elastic fibers and non-elastic fibers are taken out from a knitted fabric and each fiber is 1/10 of the fineness. Drop the load of (g), measure its length, and use the following equation:
Yarn length ratio = (Yarn length of inelastic fiber) ÷ (Yarn length of elastic fiber)
Is the value obtained by

  The draft of the coated elastic fiber is preferably in the range of 2.5 to 3.5 times, more preferably 2.7 to 3.4 times, and still more preferably 2.8 to 3.3 times. It is preferable to use an inelastic fiber having a crimp as the inelastic fiber. The single yarn fineness of the inelastic fiber is preferably 0.3 to 3.0 dtex, more preferably 0.5 to 2. In order to prevent the elasticity of the elastic fiber from being disturbed and to make the garment have a soft texture. It is 5 dtex, more preferably 0.8 to 2.3 dtex.

  It is preferable to use a cellulose fiber as a non-elastic yarn in order to impart moisture absorbability. This cellulose fiber may be any of raw yarn (raw yarn), false twisted yarn, pre-dyed yarn, etc. in the form of filament yarn, and polyester fiber or polyamide from the viewpoint of strength and fastness. Composite yarns with base fibers are particularly preferred. Further, it may be a spun yarn, or may be a blended yarn with a polyester fiber, a polyamide fiber, or the like. As a cellulose fiber, a cupra fiber is preferable. In the case of filament yarn, the fineness of the cellulose fiber to be used is preferably 15 to 110 dtex, more preferably 20 to 84 dtex. Moreover, in the case of a spun yarn, a spun yarn of No. 60 to 30 is preferable, and a No. 50 to No. 40 is more preferable.

In the non-run tissue, since the elongation is somewhat bad, it is preferable to increase the longitudinal yarn length to at least the condition for knitting at least in the calf region.
The gauge of the knitting machine is not particularly limited. It is preferable to select 320 to 440 knitting machines arbitrarily depending on the application and the thickness of the fibers used.
The leg wear of this embodiment performs sewing of the toe part, the panty part, and the crotch part according to the product type and the design after creating a living machine. Next, scouring and dyeing are performed using a drum dyeing machine, a paddle dyeing machine, and the like by a usual method, and steam setting is performed using a template and the like. The processing method may be carried out according to the processing method of the usual elastic fiber mixed circular knit fabric, but the elongation force in the warp direction / latitude when it is stretched by 30% each in the warp direction and the weft direction from at least the wearing state of the calf part. The steam set is necessary because the ratio of the stretching force in the direction is 0.6 to 1.7, and the average of the wear state load retention after 30% stretching and recovery 3 times must be 85% or more. It is particularly preferred to adjust the density of the stitches in at least the calf area as described above.

Specifically, since the density in the latitudinal direction is determined by the template, it is preferable to feed the knitted fabric at the time of steam setting in order to increase the density in the warp direction of at least the calf.
Steam setting conditions are preferably 110 to 130 ° C., which is higher than normal, for 15 to 30 seconds, and more preferably 15 to 25 seconds at 115 to 125 ° C.
Furthermore, according to the final required characteristics, the process of soft processing, sweat absorption processing, anti-static processing, antifouling processing, anti-bacterial processing, deodorizing processing, deodorizing processing, ultraviolet absorbing processing, etc. is appropriately applied according to the same bath or dyeing as dyeing. can do.

The leg wear of the present embodiment can be appropriately manufactured by combining the above-described device such as yarn use, knitting structure, knitting condition, and the like, and the above-described steam setting condition.
The leg wear of this embodiment is easy to stretch in the warp direction and in the weft direction, so when moving it will follow, even if the skin stretches in the warp direction like knee bending, it will slip off Hateful. In addition, even when the skin stretches in the latitudinal direction when force is applied to the leg muscles, etc., the knitted fabric follows the stretch of the skin, so that it is difficult for the warping force to act in the transversal direction and the slippage hardly occurs. Furthermore, there is almost no change in wearing pressure even when the muscles of the calves and thighs are swollen and contracted repeatedly when walking, etc., resulting in leg wear that is not easily fatigued.

  The inventors of the present invention investigated the blood flow enhancement effect by performing knee flexion and extension movements with eight subjects using Biodex system 3 of Sakai Medical Co., Ltd. when wearing tights with regard to the leg wear of the present embodiment. . Repeated 3 sets of the subject's high load operation (unable to stop at 80% of the maximum load) and low load operation (5 minutes at 20% of the maximum load) as one set. The recovery time until the deoxygenated hemoglobin content in the rectus femoris muscle tissue returns to the level before the high load operation of the third set (at the end of the low load operation of the second set) in the load operation during the load operation is The results were significantly faster than when the tights were not worn. Deoxygenated hemoglobin refers to oxygenated hemoglobin (oxygenated hemoglobin) that has delivered oxygen from the lungs, especially in aerobic exercise, to oxygenated muscle tissue, resulting in oxygen-free hemoglobin. It can be measured by Pocket NIRS was used for the measurement. The fact that the time to return to the amount before exercise increases after the amount of deoxygenated hemoglobin increases by exercise means that the recovery effect of the oxygen state in the muscle is high, and the tights of this embodiment This is thought to be due to promoting venous return and improving blood flow.

Hereinafter, the present invention will be specifically described by way of examples.
Each evaluation in the Example was performed as follows.
(1) Elongation characteristics of each part (i) Braided length of each part A yarn of 100 wales is extracted at each part position, and the length of the yarn when 1/10 (g) of its fineness is applied is measured did.
The position of each part is as follows.
The position of the center of the calf is 45% from the toe side of the length corresponding to the toe from the toe when the leg wear is placed flat in the case of a product including from the toe to the toe It is in. For products that include ankles and groins, they are 25% from the ankle side and 80% from the toes for stocking under the knee.
The position of the knee is 60% from the toe of the length of the position corresponding to the toe from the toe when the leg wear is placed flat in the case of a product including from the toe to the toe is there. For products that include the ankle to the groin, the position is 45% from the ankle side.
The position of the thigh is 80% from the toe with respect to the length of the position corresponding to the toe from the toe when the leg wear is placed flat in the case of a product including from the toe to the toe It is in. For products that include the ankle to the groin, the position is 65% from the ankle side.
The position of the buttocks is 20% from the toe of the length of the position corresponding to the toe from the toe when the leg wear is placed flat in the case of a product including from the toe to the toe is there. In the case of a stocking under the knee, it is 35% from the toe.
(Ii) Measurement Method of Elongation Characteristics The elongation characteristics of each part are measured by extending each part into a worn state. The measurement samples of each part were set on a suitable jig with no load, and the process was extended until the above-mentioned wearing condition was reached, and the sample was marked on a 9 cm × 9 cm square in the wearing condition. The sample was removed from the jig, cut about 1 cm to 1.5 cm larger for chucking, and treated as necessary to prevent the run from running.

The cut sample was chucked at the mark position using a Kato Tech Co., Ltd. biaxial extension tester or equivalent biaxial extension tester, extended to the above-mentioned wearing condition, and the load of the process at that time was read. Then, 30% elongation through (Wearing condition standard. Weft kept wearing condition) ・ Recovery (up to wearing condition) is repeated 3 times, and after the initial 30% elongation, the post-load and elongation recovery after 3 repetitions And, the load when returned to the wearing state was measured. Conduct the measurement in the latitudinal direction with another sample of the same knit, measure each background n = 2, and average the ratio of the longitudinal tension / latitudinal tension when stretching 30% and The retention of the wearing condition load after repeating 30% elongation recovery three times with respect to the wearing condition load before repeating the elongation recovery was determined.
Calf, knee, and thigh were similarly evaluated. The set values were as described above.
Furthermore, the stocking under the knee was also measured in the same manner as the product including the foot to the groin.
here,
Ratio of extension force = (longitudinal extension force (load at extension)) ÷ (lamination direction extension force (load at extension))
Retention rate = (wearing load after repeating 30% elongation and recovery 3 times) ÷ (wearing load before stretching and recovery repeatedly) × 100 (%)

(2) Opening angle of fiber bundle constituting knitted loop of inelastic yarn Take a magnified picture of the surface of the knitted fabric and draw a line at the center of the left upper fiber bundle constituting the knitted loop as shown in FIG. 2 (D) Then, draw a line at the center of the fiber bundle at the top right, which likewise constitutes a braided loop (E). The angle (F) between the (D) line and the (E) line was measured at a total of 10 places at different places, and the average value was obtained.

(3) Dough Sag Using a Dea-Chatcher fatigue tester (DC-3 type) manufactured by Daiei Kagaku Seiki Co., Ltd., it was sampled in a 20 cm square according to the wearing condition of the calf in the fixed sample holding portion 1a of the testing machine. The sample was fixed to a sample fixing frame 1b and placed in a tester. Further, the push-up round rod 1d is installed in the movable sample gripping portion 1c of the same tester. The height of the push-up round bar was adjusted so that the maximum push-up height of the push-up round bar 1d was 6 cm upward from the sample fixing frame 1b. The maximum push-up height of the push-up bar was set so that the sample at the maximum push-up lengthened by about 50%.
A high speed camera "Himawari GE200" manufactured by Library Co., Ltd. was installed using a tripod at a level of 20 cm from the front of the sample fixing frame, horizontal to the sample fixing frame. The Deatcher fatigue tester was set to perform 500 thrusting operations per minute, and was operated, and the 500th thrusting operation was photographed under the condition of 200 frames per second. From the captured video, assuming that the point when the tip of the round bar passes the lower end of the sample fixing frame when the round bar descends 500 times after the pushing up operation is 0, the maximum sample sag from the sample fixing frame within 0.05 seconds from that point It measured using movement analysis software "Move-tr / 2D" manufactured by Library Co., Ltd.

(4) Change in wearing pressure M size leg wear is worn by 5 women of M size, and the treadmill is raised and lowered for 3 minutes, and the pressure on the maximum circumference of the calf rear surface is the air pack type pressure gauge (AMI Co., Ltd. Measurements were made using a clothing pressure gauge, type 3037) and recorded hourly. Among the applied pressure at each peak, the average of the high 3 points was taken as the maximum applied pressure Pmax, and the applied pressure of the low 3 points was taken as the lowest applied pressure Pmin, and the applied pressure change (= Pmax−Pmin) was determined.

(5) Sensory evaluation Five women of M size were made to wear leg wear of M size, and the platform was raised and lowered for 3 minutes, and five-step evaluation was performed about a feeling of fit, a feeling of wearing comfort, and a feeling of fatigue after the end of exercise. For a sense of fit, no sense of slippage, and comfort in wearing, "very good" 5, 5, "good" 4, 3, "somewhat bad" 3, "somewhat bad" 2, "bad" 1, About feeling of fatigue, 5 "does not feel tired", 4 "does not feel tired easily", 3 "does not bother" 3 2, "it is easy to feel tired" 2 and "makes tired" 1 And the average of five persons was taken as the evaluation value.

[Examples 1 and 2, Comparative Examples 1 and 2]
A 22 dtex polyurethane elastic yarn (manufactured by Asahi Kasei Corp., Roika manufactured by Asahi Kasei Corp.) is extended 3.2 times while using a nylon 66 yarn of 10 dtex and 4 filaments as a covering yarn and a lower twist number 2100 T / M with a normal covering machine. , A double covered yarn was obtained with an upper twist number of 1700 T / M. Using this double covered yarn, the legs are knitted with a panty structure with a pantyhose circular knitting machine with 400 needles and a hook diameter of 4 inches, and a pantyhose and toe parts using a yarn of 56 dtex 17 filaments Was produced.
The order was set for the standard size pantyhose fashioning. However, the stitches of the calf, knees, and thighs were changed to prepare pantyhose having a braided length shown in Table 1 below. Thereafter, after staining and finishing by a usual method, the calves, knees and thighs were steam-set at the time of setting the template in the direction shown in the following Table 1 in the following direction (surge magnification). The obtained product performance results are shown in Table 1 below.

[Example 3, Comparative Example 3]
Pantyhose under the same conditions as in Example 1 except that covering yarn of Example 1 and Wooly nylon 66 yarn (both yarns) of 15 dtex were knitted every other course, and the braiding lengths and setting conditions of Table 1 below were used. Was produced.

  The leg wear of the present invention is easy to stretch at least in the warp and weft directions, so it will follow when the skin stretches in the warp direction like knee bending when moving, and it is difficult to slip off, and When the skin stretches in the latitudinal direction, for example, when the muscles of the legs are put in force, it is difficult for the knitted fabric to contract with the skin in order to follow the growth of the skin. In addition, the leg wear of the present invention is hardly fatigued, with almost no change in applied pressure even when the muscles of the calves and thighs are swollen and contracted repeatedly during walking.

1a fixed sample holding part 1b sample fixing frame 1c movable sample holding part 1d push up round bar D center line of fiber bundle rising to the left E center line of fiber bundle rising to the right F D and E

Claims (5)

A polyurethane elastic yarn comprising a non-elastic yarn wrapped around a non-elastic yarn, or a knitted fabric knitted with non-elastic yarn and polyurethane elastic fibers, including at least a calf, a knee and a thigh A legwear having a ratio of a stretching force in the warp direction / stretching force in the weft direction of 0.6 to 1.7 in a state of being stretched by 30% each in the warp direction and in the weft direction from at least a calf part. There, and state, and are background mean direction and wearing conditions load retention after repeated three times each 30% elongation and recovery in the weft direction 85% or more over the worn state, and, after the worn state of the calf portion Said legwear characterized in that the ratio of the density in the direction to the density in the latitudinal direction is 1.5 to 2.5 .   The leg wear according to claim 1, wherein the inclination of the knitted elastic loop or the inelastic loop is 70 degrees or less in the calf region.   In the knee portion, the ratio of the stretching force in the warp direction / stretching force in the weft direction in a state of being stretched by 30% each in the warp direction and the weft direction from the wearing state is 0.6 to 1.7, and the wearing state The leg wear according to claim 1 or 2, wherein the background average of the wearing condition load retention after repeating 30% elongation and recovery three times each from the warp direction to the weft direction is 85% or more.   The leg wear according to claim 3, wherein in the knee portion, the inclination of a knitted loop of the covering elastic yarn or inelastic yarn is 70 degrees or less.   The leg wear according to any one of claims 1 to 4, which is any of pantyhose, stocking, tights, leggings or gator.