JP2021055208A - Tubular knitted fabric product - Google Patents

Abstract

To provide a tubular knitted fabric product which a wearer can feel to be cool during wearing in hot environment such as in summer by improving heat dissipation compared to a non-wearing state due to promotion of air convection.SOLUTION: A tubular knitted fabric product includes a composite yarn formed of an elastic yarn and a non-elastic yarn. In the tubular knitted fabric product, a pitch rib height ratio obtained by the following formula: pitch rib height ratio=p/k(in the formula, p=fiber spacing when expanded if wearing is expected, and k=fiber height when expanded if wearing is expected)is 6.0 to 15.0 at a position of 13% of whole length from a center side of the body when the product is worn. The tubular knitted fabric product is a leg product or clothing covering at least a part of an arm, whose heating temperature during expansion is desirably over 0°C and below 0.5°C.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tubular knitted fabric product.

Cylindrical knitted fabrics using elastic threads include leg products such as pantyhose, leggings, and supporters that cover from the inseam to the ankles or toes, products that cover from under the shoulders to the wrists or fingertips such as arm covers, and supporters. Used for products that cover joints such as. Conventionally, as the above-mentioned products that give a feeling of coldness, leg products that suppress the feeling of stuffiness by using synthetic fibers that have been given moisture absorption such as polyamide fibers, and specially shaped cross-section yarns of polyamide fibers to obtain a refreshing feeling. There are commercially available leg products using yarn (see, for example, Patent Document 1 below) and leg products (see, for example, Patent Document 2 below) that are provided with a cool contact feeling by using full-dull yarn. These clothing products feel cool only the moment they are worn in a slightly hot season such as early summer, but when worn in a hot environment where the environment becomes sweaty due to long-term wearing or exercise such as walking, they sweat and become hot and humid and extremely uncomfortable. Therefore, there is a problem that it is not suitable for a hot environment such as midsummer.

Japanese Unexamined Patent Publication No. 6-81207 Japanese Unexamined Patent Publication No. 2003-293201

In view of the above-mentioned problem of the tubular knitted fabric product of the prior art, the problem to be solved by the present invention is that the heat dissipation is higher than that in the unworn state by promoting the convection of air, so that in a hot environment such as midsummer. The purpose is to provide tubular knitted fabric products that are cool and easy to wear.

As a result of diligent studies and experiments to solve the above problems, the present inventor has made a specific knitted fabric structure at a specific position of the tubular knitted fabric product, thereby promoting air convection and not wearing heat dissipation. It was discovered that the person can feel cool by being performed more efficiently than the state, and based on such a discovery, the present invention has been completed.

That is, the present invention is as follows.
[1] A tubular knitted fabric product containing a composite yarn composed of elastic yarn and non-elastic yarn, at a position 13% of the total length from the center side of the body when the product is worn.
Pitch rib height ratio = p / k
{In the formula, p = fiber spacing when expected to be worn, k = fiber height when expected to be worn}
The tubular knitted fabric product, wherein the pitch rib height ratio obtained in 1 is 6.0 to 15.0.
[2] At a position 13% of the total length from the center side of the body when wearing the product, the following formula:
Composite yarn elongation index = k / f
{In the formula, k = fiber height when expected to be worn, f = fineness of composite yarn}
The tubular knitted fabric product according to the above [1], wherein the composite yarn elongation index obtained in the above [1] is 4.0 or less.
[3] The tubular knitted fabric product according to the above [1] or [2], wherein the heat generation temperature at the time of extension is more than 0 ° C. and 0.5 ° C. or lower.
[4] The tubular knitted fabric product according to any one of the above [1] to [3], which is a leg product.
[5] The tubular knitted fabric product according to any one of [1] to [3] above, which is clothing that covers at least a part of the arm.

The tubular knitted fabric product of the present invention tends to feel cool when worn in a hot summer environment because the heat dissipation property is enhanced by promoting air convection as compared with the unworn state.

It is explanatory drawing of the part to measure the pitch rib height ratio, the composite yarn elongation index, the heat retention rate, the number of courses, and the number of wales of the leg product of this embodiment. It is explanatory drawing of the part to measure the pitch rib height ratio, the composite yarn elongation index, the heat retention rate, the number of courses, and the number of wales of the leg product of this embodiment. It is explanatory drawing of the part to measure the pitch rib height ratio, the composite yarn elongation index, the heat retention rate, the number of courses, and the number of wales of the leg product of this embodiment. It is explanatory drawing of the part to measure the pitch rib height ratio, the composite yarn elongation index, the heat retention rate, the number of courses, and the number of wales of clothing covering at least a part of the arm of this embodiment. It is explanatory drawing of the part to measure the pitch rib height ratio, the composite yarn elongation index, the heat retention rate, the number of courses, and the number of wales of clothing covering at least a part of the arm of this embodiment.

Hereinafter, embodiments of the present invention will be described in detail.
The tubular knitted fabric product of the present embodiment is a tubular knitted fabric product containing a composite yarn composed of elastic yarn and inelastic yarn, and is located at a position of 13% of the total length from the center side of the body when the product is worn. , The following formula:
Pitch rib height ratio = p / k
{In the formula, p = fiber spacing when expected to be worn, k = fiber height when expected to be worn}
The pitch rib height ratio obtained in 1) is 6.0 to 15.0.

The tubular knitted fabric product of the present embodiment is a tubular knitted fabric product containing a composite yarn composed of elastic yarn and inelastic yarn, and is a single circular knitting machine (pantyhose) having a small diameter of about 4 to 5 inches. It can also be manufactured using a knitting machine).
The tubular knitted fabric product of the present embodiment has the following formula at a position of 13% of the total length from the center side of the body when the product is worn.
Pitch rib height ratio = p / k
{In the formula, p = fiber spacing when expected to be worn, k = fiber height when expected to be worn}
The pitch rib height ratio obtained in 1) is 6.0 to 15.0. Here, the "center side of the body when wearing the product" refers to the side close to the connection portion with the body. For example, in the case of a tubular knitted fabric product to be worn on the upper limbs, if the product has a length up to the side, it will be on the side, and if it is less than the side, it will be on the side closer to the side. It is the end of the local product. In the case of a tubular knitted fabric product to be worn on the lower limbs, if the product covers the crotch part, the crotch part is used, and if the length is less than the crotch part, the end of the tubular knitted fabric product on the side closer to the crotch part. It is a department. Further, "when the product is expected to be worn" means a state in which the tubular knitted fabric product is stretched to correspond to the time when the product is worn, and the details will be described in Examples.

In a tubular knitted fabric product, it is important to increase the amount of heat dissipation (heat transfer from the skin and fibers to the external environment) in order to obtain a continuous cooling sensation. The amount of heat transfer from the skin to the external environment depends not only on the surface area of the heat transfer surface and the thermal conductivity of the heat conductive material, but also on the temperature difference between the skin surface and the external environment. When the tubular knitted fabric product is not worn, that is, when the skin surface is upright without protrusions (ribs), the outside air warmed on the skin surface creates an updraft near the surfaces of the legs and arms. .. Since the outside air rises along the skin surface while gradually increasing the temperature, warm air is present on the skin surface, and heat dissipation from the skin surface is unlikely to occur, and the skin feels hot. On the other hand, when the tubular knitted fabric product of the present embodiment is worn and upright, the updraft rises in the vicinity of the surfaces of the legs and arms while waving along the unevenness of the clothing product. In a tubular knitted fabric product, if the pitch rib height ratio is 6.0 to 15.0 at a position of 13% of the total length from the center side of the body when the product is worn, convection of outside air occurs efficiently. The cold outside air is guided to the skin surface, the temperature gradient between the skin surface and the outside environment becomes steep, and heat dissipation from the skin surface is promoted. When the pitch rib height ratio is less than 6.0, the air stays in a swirling manner between the ribs, making the product feel hot and humid. When it is larger than 15.0, the skin is still skin while the airflow rises between the ribs. The air is warmed on the surface and it feels a little hot. In addition, the durability is poor, and problems such as holes being opened during wearing and transmission lines running are likely to occur.

Since it is important to dissipate heat from a wide area in order to increase the amount of heat dissipated, it is effective to improve the heat dissipation from a human body portion having a larger circumference and a large surface area. The upper arm part of the arm and the thigh part of the leg correspond to the human body part having a large circumference and a large surface area. Since the position of 13% of the total length from the center side of the body when the tubular knitted fabric product is worn corresponds to the thigh part in the leg product and the upper arm part in the arm cover, this position is referred to as the knitted fabric structure. It is extremely effective to increase the amount of heat radiation.

The amount of heat dissipation (heat transfer from the skin and fibers to the external environment) becomes larger when the composite yarn composed of the elastic yarn and the inelastic yarn is sufficiently in close contact with the skin without including the air layer.
From the center side of the body when wearing the product, at a position of 13% of the total length, the following formula:
Composite yarn elongation index = k / f
In the formula, the composite yarn elongation index obtained by k = fiber height at the time of expected extension of wearing and f = fineness of the composite yarn indicates the degree of elongation of the composite yarn at the time of expected elongation of wearing. When the composite yarn elongation index is 4.0 or less, the composite yarn is stretched well when worn, resulting in a tubular knitted fabric product having higher adhesion to the skin, and the efficiency of heat dissipation is enhanced.

The heat dissipation was evaluated by the heat retention rate described below. The heat retention rate is the following formula when measuring the amount of heat radiation using a heat dissipation evaluation machine.
Heat retention rate = (W _0- W) / W ₀ x 100 (%)
{In the formula, W ₀ is the power consumption when the tubular knitted fabric is not attached to the evaluation device at standard temperature and humidity, and W is the tubular knitted fabric to the evaluation device at standard temperature and humidity. It is the power consumption when is installed. } Is required. In the garment product using the tubular knitted fabric of the present embodiment, the heat retention rate at the time of expected extension of wearing is less than 0. The smaller the heat retention rate, the higher the heat dissipation, and in particular, the fact that the heat retention rate is smaller than 0 means that the heat dissipation is higher than that in the unworn state. The details of the heat dissipation evaluation machine will be described in Examples.

The fineness of the yarns constituting the tubular knitted fabric product of the present embodiment can be arbitrarily selected from the viewpoints of compression pressure, consumption performance, texture, etc., but the pitch rib height ratio and the composite yarn elongation index are preferable. From the viewpoint that it is easy to adjust the range, 13 to 56 dtex is preferable, 13 to 40 dtex is more preferable, and 13 to 31 dtex is further preferable. The fineness of the composite yarn is the fineness of the elastic yarn coated with the inelastic yarn or the elastic yarn and the inelastic yarn in the composite twisted yarn, and more specifically, the weight of the composite yarn of a certain length is used. Weigh and then apply a load of 10 g to measure the length and determine the fineness.

When the fineness is high, it is particularly difficult to make a product that feels cool because the product has a large fiber diameter and is thick. However, for example, when the fineness is greater than 31 dtex, the fiber height k is preferably 75 μm to 220 μm by adjusting the draft ratio (the yarn length ratio of the elastic yarn and the inelastic fiber constituting the composite yarn) and the number of twists described later. , More preferably, the pitch rib height ratio (p / k) can be adjusted to 6.0 to 9.0 by setting the ratio to 75 μm to 150 μm.

In the tubular knitted fabric product of the present embodiment, the fiber diameter of the composite yarn can be adjusted by adjusting the draft ratio (the yarn length ratio of the elastic yarn and the inelastic fiber constituting the composite yarn). The draft ratio is the value of the ratio of the length of the elastic yarn to the length of the inelastic fiber when a composite yarn of a certain length is divided into elastic yarn and inelastic fiber, and the length is measured by applying a load of 10 g to each. (Length of elastic thread / length of inelastic fiber). Specifically, the smaller the draft ratio, the smaller the fiber diameter, and the larger the yarn length ratio, the larger the fiber diameter. From the viewpoint of adjusting the pitch rib height ratio and the composite yarn elongation index to a suitable range, the yarn length ratio of the composite yarn is preferably 2.0 to 3.5.

The fiber diameter can be adjusted by the number of twists of the composite yarn. When the number of twists is high, the fiber diameter becomes small, and when the number of twists is low, the fiber diameter becomes large. From the viewpoint of adjusting the pitch rib height ratio and the composite yarn elongation index to a suitable range, the number of twists of the composite yarn is preferably 1400 to 2000 T / m.

The number of wales in the circumferential direction of the tubular knitted fabric product of the present embodiment can be arbitrarily set depending on the size of the product and the like, but is preferably 320 to 440 wales. When the tubular knitted fabric product of the present embodiment does not include a sewn portion in the longitudinal direction of the leg portion or the arm portion, that is, when it is composed of a seamless tubular knitted fabric, the number of wales in the circumferential direction is tubular. It can be adjusted by the number of needles of the knitting machine used when knitting the knitted fabric.
In order to keep the pitch rib height ratio and the composite yarn elongation index in a suitable range, it is preferable that the wales density at the time of expected elongation for wearing is 15 to 30 wales / inch (2.54 cm). From the same viewpoint, the course density at the time of expected extension of wearing is preferably 23 to 70 courses / inch, and more preferably 29 to 70 courses / inch (2.54 cm). When the wales density is 15 wales / inch or more, the heat retention rate tends to be negative, the heat dissipation effect tends to be obtained, the burst strength is high, the tear is hard to break, and the aesthetics tend to be improved. On the other hand, when the wales density is 30 wales / inch or less, the heat retention rate tends to be negative and the heat dissipation tends to be high.

In order to keep the pitch rib height ratio and the composite yarn elongation index within the desired ranges, it is effective to adjust the loop length at the time of knitting. If the tension at the time of knitting is increased or the number of times is reduced, the loop length becomes shorter, the fineness at the time of expected extension of wearing becomes smaller, and the number of courses at the time of expected extension of wearing becomes larger. As a result, the pitch rib height ratio is slightly increased. On the contrary, if the tension is lowered or the degree is loosened, the loop length becomes longer, the fineness at the time of expected extension of wearing becomes larger, and the number of courses at the time of expected extension of wearing becomes smaller. As a result, the pitch rib height ratio is slightly lowered.

In a tubular knitted fabric product, if the heat generated by the product itself due to the elongation of the elastic yarn is small, the product tends to be cool when worn. Although it is impossible to set the heat generation temperature at the time of extension (heat generation temperature at the time of extension) to 0 ° C., the heat generation temperature at the time of extension is preferably more than 0 ° C. and 0.5 ° C. or less, more preferably more than 0 ° C. and 0.4 ° C. If it is as follows, it is easy to feel cool even in a hot environment. In the present specification, the heat generation temperature during expansion is the warp direction (length direction) of a tubular knitted fabric under the condition that there is no external energy supply other than expansion and contraction and the heat generation temperature during expansion due to wind does not change. 100 times of repeated expansion and contraction, in which the process of grasping the top and bottom of the knitted fabric, which is folded in half and stacking four knitted fabrics, stretches 110%, and then relaxes and returns to the original length is one time. It is a value calculated from the difference from the knitted fabric temperature before the start of the test by measuring the maximum temperature indicated by the knitted fabric by thermography while performing 500 times at a rate of 1 minute. In order to reduce the heat generation temperature during elongation to 0.5 ° C or less, use a slippery processing agent such as a silicon-based or polyamide-based processing agent, reduce the fineness of the composite yarn, and use a polyamide-based synthetic fiber and elasticity. It is effective to use a composite yarn with the yarn. It is considered that the principle that the use of the composite yarn of the polyamide synthetic fiber and the elastic yarn lowers the heat generation temperature at the time of elongation is because the hygroscopic property of the polyamide fiber suppresses the heat generation at the time of elongation.

In the tubular knitted fabric product of the present embodiment, the leg portion and the arm portion are composed of a composite yarn composed of elastic yarn and inelastic fiber. The composite yarn may be a single covering yarn (SCY), a double covering yarn (DCY) covering yarn in which an inelastic fiber is wound around an elastic yarn, or a twisted yarn.

The knitting structure of the tubular knitted fabric product of the present embodiment is not particularly limited, but all courses are composite yarns composed of elastic yarns and inelastic yarns, for example, coated elastic yarns (covering yarns) and composite twisted yarns. Therefore, it is preferable that the fabric is knitted with a tenjiku structure, or that the tenjiku structure is knitted with a cross-knitted structure of the composite yarn and the inelastic fiber. For the purpose of reinforcement or the like, it is possible to knit from the ankle to the toe with fibers prepared separately, or to mix the knit structure with the tuck structure or the welt structure.

In the Tenjiku structure knitted by the cross-knitted structure of the composite yarn and the inelastic yarn, when the fineness of the composite yarn and the inelastic yarn is significantly different and the fiber heights are different, the pitch rib height is adjusted to be suitable. Alternately changing the fiber spacing is effective for improving heat dissipation. When the fiber height of the composite yarn is k ₁ and the fiber height of the inelastic fiber is k _{2 , the fiber spacing p 1} formed by the needle loop of the composite yarn and the sinker loop of the inelastic yarn is 6.0 of k _1. The heat dissipation efficiency is adjusted by adjusting the _{fiber spacing p 2} formed by the needle loop of the inelastic yarn and the sinker loop of the composite yarn to be 6.0 to 15.0 times that of k _2. Can be maximized.

The elastic yarn used in the tubular knitted fabric product of the present embodiment can be a polyurethane-based or polyether ester-based elastic yarn. For example, as the polyurethane-based elastic yarn, a dry-spun yarn or a melt-spun yarn is used. The polymer and the spinning method are not particularly limited. It is preferable that the elongation at break of the elastic yarn is about 400% to 1000%, the elasticity is excellent, and the elasticity is not impaired at the normal treatment temperature of 180 ° C. in the presetting process during the dyeing process. Further, as the elastic yarn, an elastic yarn having high settability, antibacterial property, moisture absorption, water absorption and the like by adding a special polymer or powder can also be used. It is preferable to use an inelastic yarn having a fineness of 13 to 44 dtex, preferably 13 to 22 dtex.

Further, the tubular knitted fabric product of the present embodiment can contain an inorganic substance in the elastic thread, and can be a knitted fabric in which the performance of the contained inorganic substance is taken into consideration. For example, when titanium oxide is contained. A knitted fabric having excellent thermal conductivity and good heat dissipation can be obtained, and when an inorganic substance having excellent hygroscopicity is contained, the product has excellent hygroscopicity and is effective in suppressing the feeling of stuffiness. As a method for containing an inorganic substance, a method in which an inorganic substance is contained in a spinning stock solution of an elastic yarn and spun is simple. In the present specification, the inorganic substance refers to a simple substance and / or an inorganic compound of ceramics such as titanium oxide, and is preferably in the form of a fine powder so as not to interfere with the spinning of elastic yarn. It is preferable that these inorganic substances are contained in the elastic yarn in an amount of 1 to 10% by weight. If the amount of the inorganic substance is small, the effect of cooling or the like is small, and if it is too large, the yarn may break during spinning or stretching. The content is preferably 10% by weight, more preferably 2 to 5% by weight.

As the inelastic fiber, polyester fibers such as polyethylene terephthalate and polytrimethylene terephthalate, polyamide fibers, and polyolefin fibers such as polypropylene can be used, but polyamide synthetic fibers are preferably used. In addition, these bright yarns, semi-dull yarns, full-dull yarns, etc. can be arbitrarily used, and as for the cross-sectional shape of the fibers, fibers having any cross-sectional shape such as round, elliptical, W-shaped, cocoon-shaped, hollow yarns, etc. can be used. The form of the fiber is not particularly limited, and a crimped yarn such as a raw yarn or a false twist can be used, but it is preferable to use a raw yarn having an excellent cooling sensation and moisture absorption. It is preferable to use an inelastic yarn having a fineness of 5 to 25 dtex, preferably 8 to 15 dtex.

The inelastic fiber can also contain an inorganic substance such as titanium oxide or an agent having excellent hygroscopicity in an amount of 0.3 to 5% by weight. By containing these, a knitted fabric having excellent heat dissipation, moisture absorption and sweat absorption. Can be manufactured.

As a dyeing finish method for the tubular knitted fabric product of the present embodiment, a normal dyeing finish process can be used, the dyeing conditions are set according to the fiber material to be used, and the dyeing machine to be used is arbitrary such as a paddle dyeing machine and a drum dyeing machine. Therefore, it is possible to use a processing agent that improves water absorption and flexibility, and a processing agent that enhances the feeling of coldness. For the finish set, it is preferable that the knitted fabric is not heated as much as possible, and the temperature is 105 ° C or less and 20 seconds or less. preferable.

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples. The evaluation method used in the examples was as follows.

(1) Pitch rib height ratio The tubular knitted fabric was placed on a desk in an unstretched state, the total length was measured, and lines were drawn at 13% and 26% of the total length from the central side of the body when the product was worn. .. In the case of leg products, the length from the inseam at the base of both legs of the tubular knitted fabric to the length of the tubular knitted fabric with toes to the tip of the toe, and for leggings without toes, the length to the end of the leg around the ankle. The total length (1 of FIGS. 1 to 3) was measured by placing it on a desk in an unextended state, and lines were drawn at positions of 13% and 26% of the length from the inseam, respectively (2 and 3 in FIGS. 1). In the case of the arm cover, the length from the side end to the wrist side end is placed on the desk in an unextended state, the total length (Figs. 4 and 5-5) is measured, and the length from the side end 13 Lines were drawn at the% and 26% positions, respectively (6 and 7 in FIG. 4). A cylinder with a diameter of 14 cm, a circumference of 44 cm, and a length of 30 cm is covered with a tubular knitted fabric from the center side of the body when the product is worn. I stretched it so that it would be. A paper circular frame plate with a diameter of 8 cm and a frame width of 8 mm is placed on the tubular knitted fabric so that the line of 13% of the total length is in the center, and the frame plate is fixed to the tubular knitted fabric with instant adhesive. did. The fabric on the outside of the frame plate was cut, and sampling was performed in a stretched state assuming wearing. This was used for evaluation in the stretched state, which is supposed to be worn.
The fiber diameter of the sampled fabric was measured with a microscope VHX-6000 (manufactured by KEYENCE CORPORATION). Measurements were taken at any five points on the screen, and the average decimal point was rounded off to obtain the fiber height k. When the composite yarn is a covering yarn, the fiber diameter is large in the portion covered by the composite yarn and the fiber diameter is small in the portion where the core yarn is exposed, but it is covered when the rib height is evaluated. The fiber diameter at the location where the fiber is formed was used as the measured value. The fiber spacing, select any of the five loops, fiber spacing p _v of _vertical, and fiber spacing p _h of horizontal, and the average value was used as the fiber spacing. The average value of the fiber spacing measured in the five loops was rounded off to the nearest whole number to obtain the fiber spacing p.

(2) Composite yarn elongation index The composite yarn was pulled out from the leg portion or arm portion of the tubular knitted fabric product, the composite yarn was weighed, and then a load of 10 g was applied to measure the length to determine the fineness. Sampling was performed at three or more locations, and the fractional part was rounded off to obtain the fineness, which was defined as f. Using k obtained in (1) above, the following equation:
Composite yarn elongation index = k / f
{In the formula, k = fiber height when expected to be worn, f = fineness of composite yarn. }
The composite yarn elongation index obtained in 1 was calculated and rounded off to the second decimal place to obtain the composite yarn elongation index.

(3) Heat retention rate (heat dissipation)
The heat retention rate was measured using a self-made heat dissipation evaluation machine. The heat dissipation evaluation machine is composed of a cylinder having a diameter of 14 cm, a circumference of 44 cm, and a length of 30 cm, and has a heater and a temperature sensor inside. A control circuit is built to keep the temperature inside the cylinder at 37 ° C. When the temperature inside the cylinder is lower than 37 ° C, power is supplied to the heater to raise the temperature, and when the temperature inside the cylinder is higher than 37 ° C, power is supplied. Stop and let the temperature drop naturally. The power consumption W when the heat dissipation evaluation machine was operated in an environment of 20 ° C. and 65% RH for 1 hour was measured.
The tubular knitted fabric was placed on a desk in an unstretched state to measure the total length, and a line was drawn at a position of 26% of the total length from the central side of the body when the product was worn (3 in FIG. 1, 7 in FIG. 4). ). After adjusting the humidity for 24 hours in an environment of 20 ° C. and 65% RH, the sample is placed on a heat dissipation evaluation device and stretched so that the 26% line of the total length from the center side of the body becomes the length of the cylinder 30 cm. The amount of heat radiation was measured. _{The power consumption W 0} in the state where the sample was not attached was measured in advance, and the power consumption W in the state where the sample was attached was measured. From these measured values, the following formula:
Heat retention rate = (W _0- W) / W ₀ x 100 (%)
The heat retention rate was calculated.

(4) Heat generation temperature during extension 50% of the total length of the tubular knitted fabric product (positions of length 4 in FIG. 1 and 8 in FIG. 4), length 100 mm (excluding grip), width is tubular The knitted fabric was folded in half in the warp direction (length direction) and sampled, and the sample was held by a dematcher testing machine (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.), and repeated expansion and contraction tests were performed. The measurement environment was a constant temperature and humidity condition of a temperature of 20 ° C. and a humidity of 65% RH, and the measurement was performed in a state where no external energy supply other than expansion and contraction was received. The expansion and contraction conditions are such that the elongation rate is 110% of the initial length (since the initial length is 100 mm, it expands and the gap between the grips opens up to 210 mm), and it expands and contracts at a speed of 100 times / minute. Was repeated. The sample surface temperature during 500 times of repeated stretching and after the completion of stretching was continuously measured by thermography. At this time, the emissivity of the thermography was set to 1.0. The temperature when the surface of the sample to be measured reached the maximum temperature was read, and the temperature increased from the temperature before expansion and contraction was defined as the heat generation temperature during expansion.

(5) Course density and wale density at the time of expected wearing extension For the fabric sampled in (1) above, the number of courses in a length of 1 inch was measured. Three or more places were sampled in the circumferential direction, the number of courses was measured, and the average number of courses after the decimal point was rounded off to obtain the number of courses in the thigh.
The number of wales between 1 inch lengths of the same sample was measured in the same manner.

(6) Wearing heat generation temperature The manufactured tubular knitted fabric product is worn in an environment of 30 ° C. and 50% RH, and a treadmill is used to walk at 5 km / Hr for 3 minutes before and after walking from the front of the human body. The surface temperature of the treadmill was set to 1.0 emissivity and observed by thermography. For leg products such as panty stockings and leggings, the leg surface temperature from the thigh to the ankle, and for leg products such as gaiters and supporters, the leg surface temperature covered by the tubular knitted fabric. In the case of clothing that covers at least a part of the arm such as a cover, the surface temperature of the arm covered by the tubular knitted fabric is observed by thermography, the average temperature before and after walking is obtained by image analysis, and the entire leg before walking is obtained. How much has changed from the average temperature of
Wearing heat generation temperature = (temperature of legs or arms before walking)-(temperature of legs or arms after walking)
Obtained by. The lower the wearing heat generation temperature, the cooler the tubular knitted fabric product even in a hot environment.

(7) Feeling of wearing The manufactured tubular knitted fabric product is worn in an environment of 30 ° C. and 50% RH, and a treadmill is used to walk at 5 km / Hr for 3 minutes. , "Cool", "Normal", "Steamy", and "Steamy and unpleasant".

[Example 1]
Elastic yarn 44dtex (trade name: Leuka BZ: manufactured by Asahi Kasei Corporation) is covered with a polyamide fiber raw yarn 13dtex / 7 filament with a draft ratio of 3.0 and a twist number of 2000T / m to cover elasticity of 28dtex. It was made into a thread. Using this coated elastic yarn, a pantyhose knitting machine with 352 stitches was used to knit from the waist portion of the pantyhose to the toes. Here, in the portion corresponding to the panty portion, one coated elastic yarn and one polyamide fiber processed yarn 78dtex / 24 filament are alternately knitted, and from the inseam, only the coated elastic yarn is used to gradually reduce the size of the loop while gradually reducing the size of the loop to the toe portion. Organized up to. The knitted fabric was covered with a metal set mold and preset at 80 ° C. using a steam set machine. After that, the knitted fabric was turned over and the crotch part of the two leg knitted fabrics was sewn together to make a pair of pantyhose. Furthermore, the toe part was sewn with a talk roser, turned over again, and put into a paddle dyeing machine. The polyamide fiber was dyed, and at the end of the dyeing step, a silicon-based processing agent (SFC Silicon Nu62 (manufactured by Meisei Kagaku Kogyo Co., Ltd.)) was put into a 5% owf paddle dyeing machine and treated at room temperature for 5 minutes. After 5 minutes, the pantyhose was taken out from the paddle dyeing machine, dehydrated and dried, set in a leg-shaped metal frame, and set at 115 ° C. for 20 seconds to obtain pantyhose having 352 wales in the circumferential direction. The number of course wales, pitch rib height ratio, composite yarn elongation index, heat generation temperature during elongation, and heat retention rate of the manufactured pantyhose were measured. In addition, as a result of verifying the wearing heat generation temperature and wearing feeling by the wearing test, it was found that it was cool when worn, especially the temperature of the legs after exercise was lowered, and it was cool even when worn in a hot environment. The results are shown in Table 1 below.

[Example 2]
In Example 1, a pantyhose knitting machine having 320 stitches was used to produce leggings having 320 wales in the circumferential direction under the same manufacturing conditions. The results are shown in Table 1 below.

[Example 3]
Elastic yarn 33dtex (trade name: Leuka SF: manufactured by Asahi Kasei Corporation) is covered with a polyamide fiber raw yarn 13dtex / 7 filament with a draft rate of 3.0 and a twist number of 1600T / m to cover the elastic yarn with a coating elasticity of 24dtex. It was made into a thread. Using this coated elastic yarn, a pantyhose knitting machine with 400 stitches was used to knit from the waist portion of the pantyhose to the toes. Under the following conditions, pantyhose similar to Example 1 was produced. The results are shown in Table 1 below.

[Example 4]
In Example 3, a pantyhose knitting machine having 352 stitches was used, and pantyhose having 352 wales in the circumferential direction was manufactured under the same manufacturing conditions. The results are shown in Table 1 below.

[Example 5]
In Example 3, a pantyhose knitting machine having 320 stitches was used, and pantyhose having 320 wales in the circumferential direction was manufactured under the same manufacturing conditions. The results are shown in Table 1 below.

[Example 6]
Elastic yarn 44 dtex (trade name: Leuka BZ: manufactured by Asahi Kasei Corporation) is covered with a polyamide fiber raw yarn 13 dtex / 7 filament with a draft ratio of 3.0 and a twist number of 1800 T / m to cover the elastic yarn with a coating elasticity of 28 dtex. It was made into a thread. Using this coated elastic yarn and the raw yarn 18dtex / 3 filament of the polyamide fiber, a pantyhose knitting machine with 352 stitches was used to knit from the waist portion of the pantyhose to the toe. Here, in the portion corresponding to the panty portion, one coated elastic yarn and one polyamide fiber processed yarn 78dtex / 24 filament are alternately knitted, and from the inseam, the coated elastic yarn and the polyamide fiber raw yarn 18dtex / 3 filament are alternately knitted. After knitting, the size of the loop was gradually reduced while knitting up to the tip of the toe. The knitted fabric was covered with a metal set mold and preset at 80 ° C. using a steam set machine. After that, the knitted fabric was turned over and the crotch part of the two leg knitted fabrics was sewn together to make a pair of pantyhose. Furthermore, the toe part was sewn with a talk roser, turned over again, and put into a paddle dyeing machine. The polyamide fibers were dyed, and at the end of the dyeing step, a silicon-based processing agent (Softex HS-450 (manufactured by Kitahiro Chemical Co., Ltd.)) was put into a 3% owf paddle dyeing machine and treated at room temperature for 5 minutes. After 5 minutes, the pantyhose was taken out from the paddle dyeing machine, dehydrated and dried, set in a leg-shaped metal frame, and set at 115 ° C. for 20 seconds to obtain pantyhose having 352 wales in the circumferential direction. The results are shown in Table 1 below.

[Example 7]
In Example 6, elastic yarn 44 dtex (trade name: Leuka BZ: manufactured by Asahi Kasei Corporation) is double-covered with 11 dtex / 7 filaments of polyamide fiber raw yarn at a draft rate of 3.0 and a twist number of 1400 T / m. A 37 dtex coated elastic yarn was obtained. Using this coated elastic yarn and the raw yarn 18dtex / 3 filament of the polyamide fiber, a pantyhose knitting machine with 352 stitches was used to knit from the waist portion of the pantyhose to the toe. The results are shown in Table 1 below.

[Example 8]
In Example 4, a pantyhose knitting machine having 352 stitches was used to manufacture an arm cover having 352 wales in the circumferential direction. From the upper arm to the forearm, the toe part was knitted while gradually reducing the size of the loop with only the coated elastic thread. For both ends of the fabric, a rib structure was knitted by taking two threads of polyester fiber processed yarn 56/24 and coated elastic yarn. The tubular knitted fabric was covered with a metal set mold and preset at 80 ° C. using a steam set machine. The results are shown in Table 1 below. The polyamide fibers were dyed, and at the end of the dyeing step, a polyamide-based processing agent (Softex NF-10 (manufactured by Kitahiro Chemical Co., Ltd.)) was put into a 3% owf paddle dyeing machine and treated at room temperature for 5 minutes. After 5 minutes, it was taken out from the paddle dyeing machine, dehydrated and dried, and then set in a gold frame for an arm and set at 115 ° C. for 20 seconds to obtain an arm cover having 352 wales in the circumferential direction. The results are shown in Table 1 below.

[Example 9]
Elastic yarn 22dtex (trade name: Leuka SF: manufactured by Asahi Kasei Corporation) is covered with a polyamide fiber raw yarn 13dtex / 7 filament with a draft rate of 2.5 and a twist number of 1800T / m to cover the elastic yarn with a coating elasticity of 22dtex. It was made into a thread. Using this coated elastic yarn, a pantyhose knitting machine with 352 stitches was used to knit from the waist portion of the pantyhose to the toes. Under the following conditions, pantyhose similar to Example 1 was produced. The results are shown in Table 1 below.

[Example 10]
Elastic yarn 19dtex (trade name: Leuka BZ: manufactured by Asahi Kasei Corporation) is covered with a polyamide fiber raw yarn 11dtex / 7 filament with a draft rate of 2.4 and a twist number of 1800T / m to cover the elastic yarn with a coating elasticity of 19dtex. It was made into a thread. Using this coated elastic yarn, a pantyhose knitting machine with 352 stitches was used to knit from the waist portion of the pantyhose to the toes. Under the following conditions, pantyhose similar to Example 1 was produced. The results are shown in Table 1 below.

[Example 11]
In Example 1, pantyhose was manufactured by setting a large loop length at the time of knitting. The results are shown in Table 1 below.

[Example 12]
In Example 1, at the end of the dyeing step, a urethane-based processing agent (Pascol v-221 (manufactured by Meisei Kagaku Kogyo Co., Ltd.)) was put into a 3% owf paddle dyeing machine, and pantyhose treated at room temperature for 5 minutes was prepared. Manufactured. The results are shown in Table 1 below.

[Comparative Example 1]
In Example 1, a pantyhose knitting machine having 432 stitches was used to produce leggings having 432 wales in the circumferential direction under the same manufacturing conditions. The results are shown in Table 1 below.

[Comparative Example 2]
In Example 10, pantyhose was manufactured by setting the loop length at the time of knitting to be considerably large. The results are shown in Table 1 below. The pantyhose was torn during the operation of piercing the sample for the wearing test, and the burst strength was measured and found to be 40 hPa. In addition, uneven wearing was conspicuous, and there was a problem in aesthetics.

[Comparative Example 3]
Commercially available pantyhose with a composite yarn fineness of 37 dtex was purchased, and various physical properties were measured. The results are shown in Table 1 below.

Since the tubular knitted fabric of the present invention is a tubular knitted fabric that is cool in a hot environment, various clothing products such as pantyhose, leggings and other leg products that cover from the inseam to the ankles or toes, supporters, gaiters, etc. It can be suitably used for leg products that cover all or part of the lower limbs, products that cover from under the shoulders to the wrists or fingertips such as arm covers, and products that cover joints such as supporters.

1 Leg length of the leg product 2 13% position from the center side of the body when wearing the product of the leg product 3 26% position from the center side of the body when wearing the product of the leg product 4 Body of the body when wearing the product of the leg product 50% length from the center side 5 Total length of clothing that covers at least part of the arm 6 Position 13% from the center side of the body when wearing at least part of the arm clothing product 7 Covers at least part of the arm 26% position from the center of the body when wearing the clothing product 8 50% length from the center of the body when wearing the clothing product that covers at least part of the arm

Claims (5)

A tubular knitted fabric product containing a composite yarn composed of elastic yarn and inelastic yarn, at a position 13% of the total length from the center side of the body when the product is worn.
Pitch rib height ratio = p / k
{In the formula, p = fiber spacing when expected to be worn, k = fiber height when expected to be worn}
The tubular knitted fabric product, wherein the pitch rib height ratio obtained in 1 is 6.0 to 15.0. From the center side of the body when wearing the product, at a position of 13% of the total length, the following formula:
Composite yarn elongation index = k / f
{In the formula, k = fiber height when expected to be worn, f = fineness of composite yarn}
The tubular knitted fabric product according to claim 1, wherein the composite yarn elongation index obtained in 1. The tubular knitted fabric product according to claim 1 or 2, wherein the heat generation temperature during elongation is more than 0 ° C and 0.5 ° C or less. The tubular knitted fabric product according to any one of claims 1 to 3, which is a leg product. The tubular knitted fabric product according to any one of claims 1 to 3, which is a garment that covers at least a part of an arm.

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