JP6162995B2 - Spring / Summer Textile Products - Google Patents

Description

  The present invention is a textile product for spring and summer, for example, there is a momentary chilling feeling when wearing as an underwear, a textile product excellent in wearing comfort that is excellent in heat dissipation and moisture absorption at the time of wearing, for example, Regarding underwear. Specifically, the present invention relates to a fiber product, such as an undergarment, in which regenerated cellulose fibers are mixed, the air content of the knitted fabric is restricted, and heat and humidity accumulation in the garment is suppressed.

Spring and summer textile products, especially underwear and sports underwear, are the clothing closest to the skin, and knit fabrics with high elasticity are used so as to follow the elongation of the skin during the wearing operation. From the viewpoint of production equipment, productivity, versatility, and consumption performance, fabrics for underwear are typically milled, smooth, tengu, and more recently Kanoko, while sports under are generally tricot and other organizations. Has been used.
A knit fabric is generally stretchable compared to a woven fabric, but a three-dimensional space is formed in the stitch, and air is easily held here. The thermal conductivity of air is 0.026 W / m · ° C., which is a heat insulating material that is 10 times better than the fiber material. Therefore, the knit fabric is generally superior in heat retention as compared with the woven fabric. In addition, the structure is easily uneven, and in the narrow sense, it is not a surface contact but a point contact, which is disadvantageous for heat conduction by contact. In particular, the development of technology that suppresses the increase in humidity as well as increasing the dry heat transfer and lowering the temperature of the minute space between the skin and clothing or underwear is also important from the viewpoint of lowering the working temperature (the following non-patents) Reference 1).

  There has been a knitted fabric using fibers that have been developed for clothing and clothing materials that enhance the feeling of cooling so far, and has a high thermal conductivity and a feeling of cooling upon contact (see Patent Document 1 below). Is a study that does not take into account human insensitive steaming and sweating, but only the movement of dry heat by fiber materials. Therefore, when this knitted fabric is used as clothing or clothing material that directly touches the skin, it cannot be clothing or clothing material that suppresses an increase in humidity in the clothing and does not hinder human sweating. On the other hand, knitted fabrics have been developed that focus on the human sweating action and absorb sweat, and the fibers stretch to expand the loops of the stitches and promote the transpiration action (see Patent Document 2 below). Since the gap of the loop is expanded during perspiration, the contact area between the fiber material and the skin is rather lowered, and the dry heat transfer is lowered. In other words, it is not compatible from the principle of heat and moisture transfer. In addition, there is a report of a knitted fabric made of a composite yarn of a polyamide filament and a polyester filament to which polyvinylpyrrolidone is added aiming at heat transfer by contact and suppression of moisture increase in clothes due to moisture absorption (see Patent Document 3 below). When the hygroscopic property of the polyamide filament added with polyvinylpyrrolidone exceeds insensitive steaming, for example, when sweating from sweat glands under heat, the moisture treatment in the clothes cannot be fully covered, resulting in stuffiness.

As described above, it is important from the viewpoint of lowering the working temperature to increase the dry heat transfer and reduce the temperature of the minute space between the skin and the undergarment as well as to suppress the increase in humidity (Non-Patent Document 1 below). reference). Therefore, in the development of healthy underwear in terms of thermophysiology under heat, it is essential to make both heat transfer and moisture (liquid or gas) transfer compatible, but such underwear has not yet been developed.
As a method for removing heat from the skin during sweating, a method using latent heat of vaporization of sweat (see Patent Document 4 below) has also been proposed.

JP 2010-236130 A JP 2009-035846 A Japanese Patent No. 3744417 Japanese Patent No. 3758076

Science of clothing environment (pp.154-160)

However, the fibers constituting the knitted fabric are made of cotton having high bulkiness and water retention and a large air content layer, and polyester false twisted filaments. Easy to knit and uneven, and has a structure that holds air. Therefore, the effects of dry heat transfer and latent heat transfer due to evaporation cannot be sufficiently obtained. Further, this knitted fabric does not take into consideration the durability of water retention and water diffusibility after repeated washing, and there is a concern that the water-absorbing processing effect of the polyester exhibited in the initial stage may be reduced by washing.
An object of the present invention is to solve the above-mentioned problems of the prior art by combining heat transfer and moisture (liquid or gas) transfer, increasing heat transfer due to contact with the skin, and suppressing an increase in the temperature in the textile product. At the same time, it effectively absorbs insensitive steaming and suppresses the increase in humidity, thereby delaying the sweating point from the sweat gland, keeping the comfortable feeling as long as possible, and excellent thermophysiological comfort To provide textile products.

As a result of intensive studies, the inventor is a knitted fabric in which regenerated cellulose fibers are mixed in 20% or more of the knitted fabric weight, and the filling density is 0.260 g / cm ³ or more and 0.500 g / cm ³ or less. It has been found that a textile product made of a fabric solves the above problems. That is, the present invention is as follows.

[1] A fiber product composed of a knitted fabric in which regenerated cellulose fibers are mixed in an amount of 20% by weight or more, and the single yarn fineness of the regenerated cellulose fibers constituting the fabric is 0.8 dtex or more and 4 dtex or less, and the filling density of the fabric is 0.260 g / cm ³ or more 0.500 g / cm ³ or less, der least one surface of the heat dissipation value 10W / m ² · ℃ or more dough is, and, at least one side of the instantaneous heat flow dough flux value Is a textile product made of a fabric having a temperature of 120 W / m ² · ° C or higher .
[2] The textile product according to [1], wherein the fabric has a hygroscopicity of 5% or more.
[3] The fiber product according to the above [1] or [2], wherein the polyurethane elastic fiber is mixed in an amount of 3% to 30% of the fabric weight.
[4] The textile product according to any one of [1] to [3] , wherein the knitted fabric has a bare tengu structure.
[5] The textile product according to any one of [1] to [4] , which is used as an underwear.

  The textile product of the present invention, for example, underwear, has high moisture absorption, heat dissipation, and cool contact feeling, and even when worn during midsummer, it takes a long time to feel comfortable from the beginning of wearing to undressing. In addition, even when sweating is involved, by effectively absorbing and diffusing sweat from the skin, there is no ineffective sweating that sweats or falls, or remains wet on the skin. It is possible to provide underwear and sports underwear that enhances the heat dissipation effect compared to the case where it is not, and textile products for bedding such as bed pads and futon covers for spring and summer.

The present invention is described in detail below.
The fiber product of the present invention, such as an undergarment, is a fiber product made of a knitted fabric, such as an undergarment, characterized in that 20% by weight or more of a regenerated cellulose fiber having a high hygroscopic property, particularly a high moisture absorption speed, is mixed. Although there are individual differences in human insensitivity, according to Non-patent Document 1, it is 23 g / hour per 1 m ² of body surface area in many people. In addition, it has been clarified that the unpleasant sensation caused by smoldering depends on the humidity change value rather than the humidity value. It is necessary to absorb moisture. To that end, it is necessary to mix regenerated cellulose fibers having a high moisture absorption speed in an amount of 20% by weight or more of the knitted fabric weight.

The dough mixed with 20% by weight or more of the regenerated cellulose fiber can easily have a hygroscopicity of 5% or more of the dough weight. In order to be able to experience the hygroscopic ability, it is preferable that the regenerated cellulose fiber is mixed in an amount of 30% by weight or more. When mixed in an amount of 30% by weight or more, it becomes easy for the moisture absorption speed coefficient described later to easily exceed 0.6, and insensitive moisture from the skin surface is absorbed instantly, which is preferable. Furthermore, in order to obtain the effect of delaying the sweating point, it is preferable to mix the regenerated cellulose fiber by 50% by weight or more. When 50% by weight or more is mixed, the moisture absorption speed coefficient exceeds 0.7. The fiber product of the present invention, for example, an undergarment may be an undergarment made only of regenerated cellulose fibers, but other fibers can also be mixed.
Further, it is preferable that the hygroscopicity is 5% or more of the weight of the dough because it is excellent in absorbing water vapor-like sweat released from the skin. More preferably, it is 6% or more of the dough weight. If the hygroscopicity is too large, the absorption of liquid sweat increases at the same time, and the quick-drying property is inferior, and 15% or less of the fabric weight is preferable. Furthermore, the moisture absorption speed coefficient is preferably 0.5 or more, more preferably 0.6 or more.
Examples of the regenerated cellulose fiber include viscose rayon, polynosic rayon, purified cellulose fiber, copper ammonia rayon, and high strength rayon.

In addition, the fabric constituting the textile product of the present invention, for example, the underwear, has a filling density calculated by the following formula from a thickness measured by applying a basis weight in a standard state of 20 ° C. and 65% RH and a load of 5 gf / cm ^2. Is 0.260 g / cm ³ or more and 0.500 g / cm ³ or less. If the load is further increased when measuring the thickness, the dough will be crushed, and the original filling degree of the dough cannot be expressed. Moreover, if the load is lightened, the difference in the thickness of the fabric cannot be accurately determined.
Packing density (g / cm ³ ) = [weight per unit area (g / m ² ) / thickness (mm)] × 10 ⁻³
The optimum packing density is 0.260 g / cm ³ or more and 0.500 g / cm ³ or less from the balance of heat transfer and texture. In order to enhance dry heat transfer, 0.300 g / cm ³ or more and 0.450 g / cm ³ or less is more preferable. When it is less than 0.260 g / cm ³ , the air layer in the dough increases, the heat retaining property is improved, and the heat transfer is suppressed. If it exceeds 0.500 g / cm ³ , the fabric becomes paper-like and is not suitable for use in direct contact with the skin, particularly for use in underwear.

At the same time, the fabric constituting the textile product of the present invention requires that the heat dissipation measured by the method described later is 10 W / m ² · ° C. or more on at least one side of the fabric. It is preferable that the side facing the surface is this surface. For health reasons, it is preferable to keep it below 12.5 W / m ² · ° C. To increase the dry heat movement, in order to satisfy the balance of the heat radiation and thermogenesis, preferably 10W / m ² · ℃ than 12W / m ² · ℃ or less. When the temperature is below 10 W / m ² · ° C., the dry heat transfer does not proceed smoothly and the temperature in the clothes is increased. Also, if the heat dissipation property is abnormally high, the heat from the body is excessively taken away, and there is a risk of cooling if worn or contacted for a long time.

Furthermore, the fabric constituting the textile product of the present invention preferably has an instantaneous heat flux value of 120 W / m ² · ° C. or more on at least one side of the fabric, measured by the method described later. It is preferable that the side facing the surface is this surface. When it is 120 W / m ² · ° C or more and 190 W / m ² · ° C. or less, it feels cool and refreshed at the moment of wearing or contacting. When the temperature is lower than 120 W / m ² · ° C., a refreshing refreshing feeling cannot be obtained sufficiently.
Furthermore, it is preferable that the cooling temperature described later can be achieved at 3.0 ° C. or higher, preferably 4.0 ° C. or higher.

  When polyurethane elastic fibers are mixed with the textiles of the present invention, for example, the cloth constituting the underwear, and stretch and stretch recovery properties are provided, the movement of the person is followed and the comfort is increased, and at the same time, the body surface is easily contacted. The heat transfer efficiency of the body surface can be increased. The mixing ratio at this time is preferably 3% or more and 30% or less of the weight of the dough. The mixing ratio is more preferably 3% or more and 25% or less in order to obtain an appropriate fit. If it is less than 3%, the fit is inferior, and convection due to a gap, that is, an air layer, occurs between the skin and the fabric, and heat transfer due to contact is not promoted. If it exceeds 30%, there is a risk of being compressed in the case of apparel use and obstructing blood flow, and heat dissipation due to blood flow will be impaired. The fineness of the polyurethane elastic fiber is preferably 22 dtex or more and 40 dtex or less from the viewpoints of heat transfer characteristics, fit, and comfort.

The textiles of the present invention, for example, the fabric constituting the underwear is not limited to a structure such as a circular knitting such as a tenji, a milling cutter, or a warp knitting such as a tricot. Is most preferred. Tendon knitted with a single knitting machine can make the fabric thinner and more dense than that of a double knitting machine, but it has a low fit and is less likely to come into contact with the skin. is there. This drawback can be compensated by bare insertion of polyurethane elastic fibers. In addition, when in contact with the skin, there is an advantage in that when the sweat is generated, the drying speed of the fabric is increased by using the skin as a heat source. When a textile product, for example, an undergarment is made of a bare lantern, it is preferable to dispose the needle loop on the skin side because the unevenness is less than that on the sinker loop side and the touch is good and the cooling feeling is enhanced.
In the case of warp knitting, it is preferable to use a polyurethane elastic fiber, and to be composed of a 2-way tricot that increases the stretchability of the background and can adhere to the skin.

  The fibers constituting the fiber product of the present invention, such as underwear, are preferably long fibers without fluff rather than short fibers having fluff. If there is no fluff, it is difficult to carry air, and if it has fluff, air is held in the fuzz, which hinders dry heat transfer. In the case of long fibers, it is preferable to select and knit fibers having a fiber fineness of 30 dtex or more and less than 130 dtex in order to soften the texture of the fabric. If it is less than 30 dtex, the burst strength necessary for underwear is not provided. Further, if it is 130 dtex or more, the softness accompanying the skin cannot be obtained. Regarding the shape of the constituent fibers, the cross-sectional shape of the constituent single yarn is triangular, cross, etc., from the viewpoint of reducing friction with the skin and making micro scratches difficult, especially in the case of underwear, from the viewpoint of reducing friction with the outer. A cross-sectional shape such as a circle or an ellipse having no corners is preferable to a cross-sectional shape having corners. The single yarn fineness of the constituent yarn is preferably less than 4 dtex because the finer the fabric, the softer the fabric. Since it becomes difficult to form a fine air layer, the single yarn fineness is preferably 0.8 dtex or more, and more preferably 1 dtex or more and 3 dtex or less considering the balance with the texture. The form of the fiber may be either a raw yarn or a processed yarn, but in the case of a processed yarn, it is preferable that the crimp is small in order to reduce the air layer.

  When fibers other than regenerated cellulose fibers are mixed with the textiles of the present invention, for example, the fabric constituting the underwear, the mixing ratio of fibers other than regenerated cellulose is reduced to 80% or less from the viewpoint of moisture absorption and desorption. In order to feel it, it is preferable to be 70% or less. Furthermore, a form in which two or more kinds of fibers are combined into a single yarn by air, heat, and a twisting device is preferable, rather than knitting the regenerated cellulose fiber and other fibers alone. This is because differences such as fiber-specific shrinkage difference, bulge difference, and crimp characteristic difference cause unevenness in the fabric after dyeing and form an air layer, which reduces heat transfer and heat dissipation by contact. The method of compounding into one yarn is, for example, a regenerated cellulose long fiber and a synthetic long fiber such as polyamide, polyester or acrylic on the other side, intertwisting, interlace blend, interlace blend after false twist, interlace blend Examples of the method include compounding by methods such as post false twisting, interlace mixed post-twisting, and fiber mixing by fluid disturbance processing.

  As composite combinations, composite yarns of regenerated cellulose long fibers and polyester-based long fibers are used from the viewpoint of wearing comfort, consumption performance, and productivity, and from the viewpoint of wearing comfort, particularly hygroscopicity and bending softness. From the viewpoint of quick drying, the composite yarn of cellulose long fiber and polyamide long fiber is preferably a composite yarn of regenerated cellulose long fiber and polyester long fiber or acrylic long fiber. When melt-spun synthetic fibers are used, undrawn yarn (POY) may be used, but it is better to select a yarn with a small crimp in order to reduce the air layer.

  When short fibers are used as the constituent fibers, short fibers having a single yarn fineness of 2 dtex or less and a fiber length of 25 or more, more preferably 38 mm or more may be selected in order to soften the texture and reduce friction with the skin. Examples of the material include cellulosic staples, polyester staples, acrylic staples, nylon staples, and composite staples thereof. In any case, fibers having a cross-sectional shape without corners are preferable. At this time, if the thickness of the short fiber is 40th to 60th, even if it is a short fiber, the fabric tends to be softened. In this case, the number of twists of the constituent short fibers is preferably 20 / inch or more and 30 / inch or less from the viewpoint of yarn hardness and texture. This short fiber can be compounded with the above-mentioned long fiber on the machine, but in order to reduce the friction coefficient, it is necessary to use a fine spinning and twisting technique beforehand to wrap the short fiber with the long fiber. Good.

  A general knitting machine may be used for knitting the fabric constituting the textile product of the present invention, for example, the underwear, but the gauge is preferably 28 G or more in the case of circular knitting, and more dense when it is 32 G or more. More preferred for knitting the knitted fabric. 60 G or less is preferable from the viewpoints of productivity, texture, and physical properties. Similarly, in the case of warp knitting, 28G or more is preferable, and more preferably 32G or more. The number of saddles is preferably 3 or less, and more preferably 2 sheets.

The dyeing process of the fabric constituting the textile product of the present invention, for example, the underwear, is processed in the order of presetting, scouring, dyeing, finishing, and final setting. A processing machine used for scouring and dyeing is preferably a low-tensioning machine such as a generally used liquid dyeing machine or a continuous scouring machine.
Prior to dyeing, a step of increasing whiteness by bleaching and bleaching may be added. As the dye, the dyeing assistant, and the finishing agent, those developed for dyeing synthetic fibers and / or cellulose fibers that are commercially available can be arbitrarily selected. Prior to dyeing, treatment such as alkali treatment for improving the dyeability of the regenerated cellulose fiber and alkali weight reduction processing for polyester fiber for improving the texture may be performed. It is also possible to use a water-absorbing agent and a softening agent in the dye bath or to pad these after soaping. The use of a softening agent is effective for enhancing the feel and texture. At the time of final setting, it is advisable to draw out in order to make the dough flat. Furthermore, as a smoothing of the fabric, calendering with paper, felt, plast, etc., increases the filling density of the fabric and increases dry heat transfer, and midler and blouse shirts worn on sports underwear and underwear It produces the effect of lowering the fluid resistance of air (for example, osmotic flow and convection air) between outerwear such as shirts and sports underwear and underwear, and contributes to the improvement of heat and moisture transfer characteristics.

In order to make the knitted fabric used for the textile product of the present invention, for example, an undergarment dense, depending on the structure, for example, in the case of a bare sheet, the number of courses after dyeing is 70 to 145 and the number of wells is 40 to 85. It is good to set so that it is as follows. When the number of courses is increased to 145 and the number of wells exceeds 85, the fabric becomes hard like paper. If it is a milling cutter, it is preferable to set the number of courses and the number of wells to be 40 or more and 60 or less for the same reason.
Further, in the case of a bare tempura, when the number of courses is less than 70 and the number of wells is less than 40, the fabric has eyes that are uneven, resulting in a decrease in instantaneous heat flux, an increase in the air layer, and a decrease in heat dissipation. If it is a milling cutter, it is not preferable that the number of courses and wells is less than 40 for the same reason.

The fabric weight of the textile of the present invention, for example, the fabric constituting the underwear is not particularly limited, but is preferably about 100 g / m ² to about 200 g / m ² , more preferably about 120 g / m ² to about 180 g / m ² . . If the basis weight is too small, the sweat treatment function will be inferior, the bursting strength will be low, causing problems with consumption performance, and if it is too large, it will become too thick, resulting in poor heat dissipation and wearing operability and may affect the appearance. .
The fiber product of the present invention is suitable for use as a sports underwear or underwear that requires a sweat treatment function, but is not particularly limited, and bedding applications such as a futon side, a sheet, a floor pad, and a cloth It can also be applied to hygiene applications represented by diapers, incontinence pants, sanitary shorts, sanitary products, etc., and each can exhibit comfort due to its high moisture absorption, water absorption and heat transfer characteristics.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited only to these examples. First, a method for measuring and evaluating each characteristic in the present invention will be described.
(1) Packing density Calculated by the following formula.
Packing density (g / cm ³ ) = [weight per unit area (g / m ² ) / thickness (mm)] × 10 ⁻³
However, the basis weight is a weight in a standard state of 20 ° C. and 65% RH, and the thickness is a thickness measured by applying a load of a contact pressure of 5 gf / cm ² .

(2) Hygroscopicity The dough to be measured is cut into a 10 cm square, put into a blower dryer, and pre-dried at 80 ° C. for 1 hour. After finishing, put it in a bag with moisture impermeable quickly in the dryer, put it in a desiccator covered with silica gel, cover the desiccator and cool it to 20 ° C. When it is cooled, it is transported to the environmental chamber A that has been conditioned to 20 ° C. and 20% RH, the lid of the desiccator is opened, the bag is further opened, and it is left for 12 hours. The next day, after measuring the weight w ₀ of the dough, it is again put in a bag with a zipper that does not allow moisture to pass through, sealed, and transferred to the environmental chamber B at 20 ° C. and 90% RH. The weight is measured at regular intervals from the moment the bag is opened in the environmental chamber B.
The weight at time 0 is w ₀ . Measurement interval is 1 minute (w _1m ), 3 minutes (w _3m ), 5 minutes (w _5m ), 10 minutes (w _10m ), 15 minutes (w _20m ), 30 minutes (w _30m ), 1 Time (w _1h ), 2 hours (w _2h ), and 3 hours (w _3h ). The measurement is completed after 3 hours of opening.
Next, a weighing bottle whose weight has been measured in advance is prepared. Place the dough after the measurement in a weighing bottle and leave it open without covering the lid. Place in a blower and dry at 105 ° C. for 3 hours. After completion, cover the weighing bottle quickly in the dryer, put it in a desiccator covered with silica gel, cover the desiccator and cool to 20 ° C. When it is cooled, the weight of the weighing bottle with the lid and the weight of the dough is measured, and the weight of the weighing bottle is reduced to obtain the completely dry weight w _{Z of} the dough.
Moisture absorption rate of fabric at 20 ° C. × 20% RH = [(w ₀ −w _z ) / w _z ] × 100 (%)
Moisture absorption rate of fabric after 1 minute of transition to 20 ° C. × 90% RH = [(w _1m −w _z ) / w _z ] × 100 (%)
_Moisture absorption rate of the fabric 3 hours after moving to 20 ° C. × 90% RH = [(w _3h −w _z ) / w _z ] × 100 (%)
The hygroscopicity is calculated from the difference between the moisture absorption rate after 3 hours of opening and the moisture absorption rate at 20% RH humidity control.
The moisture absorption speed coefficient is the slope of an approximate straight line connecting the moisture absorption rate calculated from the weight after opening 1 minute, 3 minutes and 5 minutes and the moisture absorption rate at the time of 20% RH humidity control. It has been clarified that the discomfort due to stuffiness during wearing depends on the humidity change value rather than the humidity value, and the initial moisture absorption speed is important.

(3) Heat dissipation Measured using Thermolab II manufactured by Kato Tech. Also known as dry heat loss, follow the measurement manual manufactured by Kato Tech.
A fabric that has been conditioned to an ambient temperature and humidity of 20 ° C. and 65% RH is pasted on a frame (thickness 2 mm, weight per unit 163 g / m ² ) of a predetermined heat insulating material, and brought into contact with a heater maintained at a constant temperature of 30 ° C. The heat supply amount (W / 100 cm ² · 10 ° C.) for keeping the temperature at 30 ° C. is read. Multiply by 100 and divide by 10 to convert the temperature difference per 1 ° C and the fabric area to 1 m ² (W / m ² · ° C). The dough is placed so that the side of the skin hits the heater. Here, when the heat dissipation when no fabric is placed is measured as a blank value, in an environment of 20 ° C. and 65% RH, 12.0 to 13.0, and the heat dissipation of only the frame made of a heat insulating material is 11.5 to 12.5.

(4) Instantaneous heat flux (contact cooling feeling)
Measurement is performed using Thermolab II manufactured by Kato Tech. Also called Qmax, according to the measurement manual manufactured by Kato Tech.
Place the fabric with the ambient temperature and humidity adjusted to 20 ℃ 65% RH in advance on the foam insulation with the skin side facing up, and bring the hot plate and temperature sensor warmed to 30 ℃ into contact with the fabric skin side. Read the instantaneous heat flux (W / cm ² · 10 ° C).
In order to convert the temperature difference per 1 ° C. and the fabric area into 1 m ² (W / m ² · ° C.), multiply by 10,000 and divide by 10.

(5) Cooling temperature In the present invention, the “cooling temperature” refers to the temperature difference before and after contact when a skin model as described later is prepared, heated to a certain temperature with a heater, and then brought into contact with the sample fabric. That is, the heat transfer characteristics of the dough are evaluated.
This evaluation is preferably performed in a standard state environment of 20 ° C. and 65% RH in order to correspond to the instantaneous heat flux value. Confirming the difference in cooling temperature, it is easier to understand the coolness than the heat flux. For this measurement, a non-contact temperature sensor (commonly called thermography) is used. In the contact temperature sensor, the temperature sensor is sandwiched between the skin model and the fabric, which will be described later, and the measurement cannot be performed correctly, and both the skin model and the fabric surface cannot be captured simultaneously. In thermography, it is better to make the field of view a little wider so that both the surface of the skin model to be described later and the fabric surface separated from the skin model can be measured.

  First, the sample fabric used for the test is set on a heat insulating material cut in advance. The sample dough and the heat insulating material are previously conditioned in a measurement environment, and the dough is cut into a 9 cm square, and the heat insulating material (preferably a 2 cm thick polystyrene foam) is also cut into a 9 cm square. Place the dough on the cut insulation. At this time, it is preferable to fix the four sides of the dough on the heat insulating material with an insect pin, since the subsequent measurement value stability is increased. The fabric can reflect the difference in actual wear when the skin side is the upper surface. If the dough is as thin as 0.7 mm or less with the thickness gauge used in the measurement of (1), the performance difference of the material can be further clarified by stacking 2 or 3 sheets and holding them with an insect pin. . In the case of heavy ground, one piece is sufficient.

Subsequently, a skin model for temperature measurement is prepared. As the skin model, a leather having a thickness of 1 mm or more, more preferably 1.2 mm or more, cut and pasted to the same size as the lower surface is used on the lower surface of a 500 gf calibration weight having a bottom radius of 2 cm. The leather is preferably a cow because of its thickness. The surface of the leather should be smooth and tanned. For example, when the friction coefficient is measured by using a standard cloth “Kanakin No. 3” with KES-SE made by Kato Tech, a relatively smooth one such that MIU = 0.20 to 0.25 is preferable. The measurement conditions at this time are a total of 50 gf of the load 25 gf friction element 25 gf, sensitivity H, and moving speed of 1 mm / sec as standard conditions. Instantaneous heat flux leather itself may be of 230W / m ² · ℃ than 260W / m ² · ℃ or less.
The color of leather and calibration weight should be unified to black considering radiation.
A heat insulating material having a thickness of 2 mm is sandwiched between the leather and the calibration weight. A thin cellophane (registered trademark) type double-sided tape may be used for these adhesions.

  Next, a thermal heater with a constant temperature function is prepared. It is preferable to lay a metal with extremely high thermal conductivity such as a thin copper plate of 1 to 2 mm on the heater surface because the temperature of the heater surface can be stabilized. The skin model is placed on the surface of the thermal heater set to 40 ° C. ± 2 ° C. (preferably on a copper plate placed on the heater surface) and heated for about 3 minutes. At this time, it is confirmed that the weight of the skin model is heated to about 33 to 37 ° C. by turning over the weight so that the leather surface faces upward. If the skin model surface temperature exceeds 37 ° C, lower the heater by 1 ° C. If the surface temperature is below 33 ° C, the heater is adjusted by raising it by 1 ° C. The environmental temperature and the surface temperature of the skin model should be 15 ° C. or higher, preferably 20 ° C. Even if the heater temperature is increased in order to bring about a temperature difference higher than this, the skin model surface temperature will rise above the body temperature, which is the actual body surface temperature, and the actual wearing is not reflected and there is no significance in measurement. Next, the skin model on the heater is quickly replaced on the fabric. When the leather surface is turned upside down after 10 seconds, the temperature of the skin model is lowered, and the ease of heat radiation on the fabric surface is captured in a non-contact manner. This data is stored at an interval of about 10 frames per second, and if an instantaneous temperature change is analyzed later, the accuracy is high.

For example, when the heater is set to 42 ° C., the temperature drop of this skin model is 3 ° C. when the heat flux value is 120 (W / m ² · ° C.) and 140 (W / m ² · ° C.). If it is 160 (W / m ² · ° C.) or higher at 4 ° C., it will be 5 ° C.
If it has an effect of lowering by 3 ° C or more, it can feel cool when touching the fabric.

(6) Sensory test A
Ten wear monitors (male with a height of 170 cm ± 10 cm, age 19-32) were selected, and each monitor was faced down to wear a prototype underwear, and a sensory test was conducted in September.
The experiment was started at the same time, one sheet per day, and rested in a sitting position for 20 minutes in a preliminary test room at 28 ° C. and 40% RH. % Y-shirt, underwear is 60% cotton, 35% polyurethane, 5% brief, 100% cotton chinos, 55% cotton, 30% nylon, 8% nylon, 7% socks), 30 ° C 40 % RH moved to the test room. The test was completed by resting in a sitting position for 10 minutes, and subsequently exercising for 10 minutes on a treadmill set to 8 km / hour, and then resting in a sitting position for 10 minutes.
The sensory evaluation of the feeling of cooling at the initial stage of wearing, the heat dissipation during wearing and the feeling of stuffiness was performed in the following five stages, and the mode value was taken as the evaluation result.
<Evaluation of cool feeling and heat dissipation>
5: High cooling feeling (heat dissipation)
4: Cool feeling (heat dissipation) is slightly high
3: I can't say either
2: Cool feeling (heat dissipation) is slightly low
1: Low cooling (heat dissipation) <Evaluation of stuffiness>
5: Difficult to feel stuffy
4: I don't feel much stuffiness
3: I can't say either
2: A little stuffy
1: Feeling stuffy

(7) Sensory test B
Ten wear monitors (men with a height of 170 cm ± 10 cm, age 19-32) were selected, and each monitor was faced down to wear a long-sleeved sports underwear made of a prototype fabric, and a sensory test was conducted in September.
The experiment was started at the same time every day, and after resting in a sitting position for 20 minutes in a preliminary test room at 28 ° C and 40% RH, after changing clothes (upper is a prototype undershirt, 100% polyester Short sleeve polo shirt, lower garment 60% cotton 35% polyurethane 5% brief, 9-minute spats made of the same fabric as the upper garment, 100% polyester short bread, socks are 55% cotton 30% nylon about 8% % Polyurethane) and moved to a test room at 30 ° C. and 40% RH. The test was completed by resting in a sitting position for 10 minutes, and subsequently exercising for 10 minutes on a treadmill set to 8 km / hour, and then resting in a sitting position for 10 minutes. Then, it moved to the reserve room of 28 degreeC40% RH, and was made still for 10 minutes.
Sensory evaluation was performed in the following five stages for the feeling of cooling at the initial stage of wear, the heat release and stuffiness during wearing, the ease of drying of sweat after wearing, and the feeling of cooling.
<Evaluation of cool feeling and heat dissipation>
5: High cooling feeling (heat dissipation)
4: Cool feeling (heat dissipation) is slightly high
3: I can't say either
2: Cool feeling (heat dissipation) is slightly low
1: Low cooling (heat dissipation) <Evaluation of stuffiness>
5: Difficult to feel stuffy
4: I don't feel much stuffiness
3: I can't say either
2: A little stuffy
1: Feeling stuffy <Evaluation of the ease of sweat drying>
5: Sweat is very easy to dry, does not remain on the skin, and does not feel cold at all
4: The sweat dries, hardly remains on the skin, and it is hard to feel cold
3: I can't say either
2: Slightly hard to dry, slightly remaining on the skin, feels a little cold
1: Sweat is very difficult to dry, remains on the skin and feels cold

(8) Sensory test C
I made a summer quilt and mattress cover with a prototype fabric.
Select 10 monitors to wear (men with a height of 170 cm ± 10 cm, age 19-32), give each monitor a cover for summer, give a mattress with the cover, turn down the details, and sensually in September A test was conducted.
Experiments started at the same time, one sheet per day, rested in a sitting position in a preliminary test room at 28 ° C and 40% RH for 20 minutes, and after changing clothes (100% cotton pajamas, 60% cotton polyester) 35% polyurethane 5% brief was worn) and moved to a test room at 28 ° C. and 60% RH. Prepare a quilt with a cover on the cot in the test room, lie on your back, put it on the skin for summer, rest for 30 minutes, and feel the initial cooling, heat dissipation during use and stuffiness Sensory evaluation was performed in five stages, and the mode value was taken as the evaluation result.
<Evaluation of cool feeling and heat dissipation>
5: High cooling feeling (heat dissipation)
4: Cool feeling (heat dissipation) is slightly high
3: I can't say either
2: Cool feeling (heat dissipation) is slightly low
1: Low cooling (heat dissipation) <Evaluation of stuffiness>
5: Difficult to feel stuffy
4: I don't feel much stuffiness
3: I can't say either
2: A little stuffy
1: Feeling stuffy

[Example 1]
84dtex45f cupra bright filament and 22dtex3f polyurethane elastic fiber (registered trademark Leica) were compounded on a 32G single circular knitting machine using a positive feed device to obtain a bare sheet with a cupra blend ratio of 91% and polyurethane elastic fiber blend ratio of 9%. . After this dough was pre-set, it was scoured and dyed using a liquid dyeing machine, and after the final setting, a dough 1 with 86 courses and 51 wales was obtained. As shown in Table 1, the thermal properties of this dough were excellent. Subsequently, the needle loop side was sewn so as to be in contact with the skin to make an underwear (for the upper body), and the sensory test was performed on the monitor by the sensory test A method. The evaluation results are shown in Table 1. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Example 2]
A 56 dtex 30 f cupra fuldal filament and a 44 dtex 24 f polyester semi-dal filament were interlaced by a known method, and then twisted 1000 times / m with a twisting machine to obtain a composite processed yarn. The obtained composite processed yarn had a cupra mixing ratio of 55% and a polyester mixing ratio of 45%. This yarn and 22dtex3f polyurethane elastic fiber (registered trademark Leuka) were compounded on a 32G single circular knitting machine using a positive feed device. The cupra blend ratio was 51.6%, the polyester blend ratio was 40.6%, and the polyurethane elastic fiber blend ratio was 7. Obtained 8% Bear Tengu. This dough was pre-set, then scoured and dyed using a liquid dyeing machine, and after the final set, a dough 2 with 84 courses and 43 wales was obtained. As shown in Table 1, the thermal properties of this dough were excellent. Subsequently, the needle loop side was sewn so as to be in contact with the skin to make an underwear (for the upper body), and the sensory test was performed on the monitor by the sensory test A method. The evaluation results are shown in Table 1. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Example 3]
The dough obtained in Example 1 was used as a surface where the sinker loop side touched the skin, and the thermal characteristics were measured. Although the result was slightly inferior to Example 1, it was excellent as shown in Table 1. Subsequently, the sinker loop side was sewn so as to be a surface in contact with the skin to make an underwear (for the upper body), and the sensory test was performed by the method of the sensory test A. The evaluation results are shown in Table 1. Although slightly inferior to Example 1, it was determined that the feeling of cooling and heat dissipation was high and it was difficult to feel stuffiness.

[Example 4]
A false twisted filament obtained by false twisting POY of 25 dtex 24f flat cross section nylon 66 and a 33 dtex 24f cupra bright filament were interlaced by a known method to obtain a composite processed yarn. The obtained composite processed yarn had a cupra blend ratio of 59.5% and a nylon blend ratio of 40.5%. This composite yarn and 22dtex3f polyurethane elastic fiber (registered trademark Leuka) were combined on a 46G single circular knitting machine using a positive feed device, and the cupra blend ratio was 52%, nylon blend ratio was 35%, and polyurethane elastic fiber blend ratio was 13%. I got Bear Tengu. This dough was pre-set, then scoured and dyed using a liquid dyeing machine, and after the final setting, a dough 4 having 122 courses and 70 wales was obtained. As shown in Table 1, the thermal properties of this dough were excellent. Subsequently, the needle loop side was sewn so as to be in contact with the skin to make an underwear (for the upper body), and the sensory test was performed on the monitor by the sensory test A method. The evaluation results are shown in Table 1. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Example 5]
Using a cupra bright filament of 84 dtex 45f, a milling machine having a cupra blend ratio of 100% was obtained by a 32G small round knitting machine. This dough was scoured and dyed with a liquid dyeing machine, and after the final setting, a dough 5 having 42 courses and 45 wales was obtained. As shown in Table 1, the thermal properties of this dough were excellent. Subsequently, the inner side was sewn so as to be in contact with the skin at the time of knitting to make the underwear (for the upper body), and the sensory test was performed on the monitor by the method of sensory test A. The evaluation results are shown in Table 1. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Example 6]
After interlaced blending of 84 dtex54f cupra full-filament filament and 33 dtex12f polyester filament by a known method, it was twisted 300 times / m with a twisting machine to obtain a composite processed yarn. The obtained composite processed yarn had a cupra blend ratio of 72% and a polyester blend ratio of 28%. Using this composite yarn, a milling machine having a cupra blend ratio of 71% and a polyester blend ratio of 29% was obtained with a 32G small-size round knitting machine. This dough was scoured and dyed with a liquid dyeing machine, and after the final setting, a dough 6 having 55 courses and 40 wales was obtained. As shown in Table 1, the thermal properties of this dough were excellent. Subsequently, the inner side was sewn so as to be in contact with the skin at the time of knitting to make the underwear (for the upper body), and the sensory test was performed on the monitor by the method of sensory test A. The evaluation results are shown in Table 1. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Example 7]
After interlaced blending of 84 dtex54f cupra full-filament filament and 33 dtex12f polyester filament by a known method, it was twisted 300 times / m with a twisting machine to obtain a composite processed yarn. The obtained composite processed yarn had a cupra blend ratio of 72% and a polyester blend ratio of 28%. This composite processed yarn and 22dtex3f polyurethane elastic fiber (registered trademark Leuka) are compounded on a 28G single circular knitting machine using a positive feed device, and the cupra blend ratio is 67%, the polyester blend ratio is 26%, and the polyurethane elastic fiber blend ratio is 7%. Got a bear tengu. This dough was pre-set and then scoured and dyed using a liquid dyeing machine. After the final setting, a dough 7 having 71 courses and 42 wales was obtained. As shown in Table 1, the thermal properties of this dough were excellent. Subsequently, the needle loop side was sewn so as to be in contact with the skin to make an underwear (for the upper body), and the sensory test was performed on the monitor by the sensory test A method. The evaluation results are shown in Table 1. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Example 8]
After interlaced mixing of 84 dtex54f cupra fuldal filament and 33 dtex12f nylon filament by a known method, it was twisted 300 times / m with a twisting machine to obtain a composite processed yarn. The obtained composite processed yarn had a cupra blend ratio of 72% and a nylon blend ratio of 28%. This composite processed yarn and 22dtex3f polyurethane elastic fiber (Registered Trademark Leuka) are combined on a 28G single circular knitting machine using a positive feed device, cupra mixing ratio 67%, nylon mixing ratio 26%, polyurethane elastic fiber mixing ratio 7% Got a bear tengu. This dough was pre-set and then scoured and dyed using a liquid dyeing machine. After the final setting, a dough 8 having a course number of 77 and a wale number of 43 was obtained. As shown in Table 1, the thermal properties of this dough were excellent. Subsequently, the needle loop side was sewn so as to be in contact with the skin to make an underwear (for the upper body), and the sensory test was performed on the monitor by the sensory test A method. The evaluation results are shown in Table 1. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Comparative Example 1]
A composite yarn was obtained by interlace false twisting a 33 dtex 24f cupra bright filament and an 84 dtex 36f polyester W cross-section filament by a known method. This composite yarn had a cupra blend ratio of 28% and a polyester blend ratio of 72%. This composite yarn and 50 /-combed cotton were knitted on a 28G small round knitting machine to obtain a milling machine having a cupra blend ratio of 14%, a polyester blend ratio of 37%, and a cotton blend ratio of 49%. This dough was scoured and dyed with a liquid dyeing machine, and after the final setting, a dough 9 having a course number of 48 and a wale number of 38 was obtained. As shown in Table 1, the dough had a slightly mixed regenerated cellulose fiber and was poor in hygroscopicity, hygroscopic speed and fineness. Subsequently, the underwear (for the upper body) was sewn so that the sinker loop side would be the surface that touched the skin, and the sensory test was performed by the method of sensory test A. The evaluation results are shown in Table 1. The sensation of cooling and heat dissipation was not good, and it was judged that a little stuffiness was felt.

[Comparative Example 2]
Nylon 66 false twisted filament obtained by false twisting 100dtex72f round cross section nylon 66 and 22dtex3f polyurethane elastic fiber were combined on a 28G single circular knitting machine using a positive feed device. A bare tengu with a blending ratio of 91% and a polyurethane elastic fiber blending ratio of 9% was obtained. This dough was pre-set and then scoured and dyed using a liquid dyeing machine. After the final setting, a dough 10 having 72 courses and 44 wales was obtained. This fabric was not mixed with regenerated cellulose fibers, was inferior in hygroscopicity and hygroscopic speed, and the thermal characteristics were not good as shown in Table 1. Subsequently, the underwear (for the upper body) was sewn so that the sinker loop side would be the surface that touched the skin, and the sensory test was performed by the method of sensory test A. The evaluation results are shown in Table 1. The sensation of cooling and heat dissipation was not good, and it was judged that a little stuffiness was felt.

[Comparative Example 3]
The dough obtained in Comparative Example 2 was used as a surface where the needle loop side touched the skin, and the thermal characteristics were measured. Although the result was slightly higher than Comparative Example 1, as shown in Table 1, it was not good. Subsequently, the needle loop side was sewn so as to be a surface in contact with the skin to form an underwear (for the upper body), and the sensory test was performed by the sensory test A method. The evaluation results are shown in Table 1. As in Comparative Example 1, it was determined that the sensation of cooling and heat dissipation was not good, and the stuffiness was slightly felt.

[Comparative Example 4]
50 /-combed cotton and 22dtex3f polyurethane elastic fiber were compounded on a 28G single circular knitting machine using a positive feeding device to obtain a bare sheet having a cotton mixture ratio of 90% and a polyurethane elastic fiber mixture ratio of 10%. This dough was pre-set and then scoured and dyed using a liquid dyeing machine. After the final setting, dough 11 having a course number of 72 and a wale number of 42 was obtained. This fabric is not mixed with regenerated cellulose fibers, is slightly inferior in hygroscopicity and hygroscopic speed, can not be dense due to the use of short fibers, has many air layers, and its thermal properties are as shown in Table 1, due to its thermal insulation effect. It wasn't good. Subsequently, the needle loop side was sewn so as to be in contact with the skin to make an underwear (for the upper body), and the sensory test was performed on the monitor by the sensory test A method. The evaluation results are shown in Table 1. The sensation of cooling and heat dissipation was not good, and it was judged that a little stuffiness was felt.

[Comparative Example 5]
84dtex45f cupra bright filament and 56dtex72f round cross-section polyester were subjected to interlace mixed false false twisting by a known method to obtain a composite yarn. This composite yarn had a cupra mixing ratio of 60% and a polyester mixing ratio of 40%. Using this composite yarn, a 106 dtex 66f polyester twisted yarn obtained by twisting a polyester filament having a flat cross section of 50 dtex 36 f and a round cross section of 56 tex 36 f, and a polyurethane elastic fiber of 22 dtex 3 f using a positive feed device (half-use) Compounding was performed on a 28G single circular knitting machine to obtain a bare sheet having a cupra blend ratio of 25%, a polyester blend ratio of 70%, and a polyurethane elastic fiber blend ratio of 5%. After the dough was pre-set, it was scoured and dyed using a liquid dyeing machine. After the final setting, a dough 12 having a course number of 50 and a wale number of 45 was obtained. This fabric has a packing density of less than 0.260 g / cm ³ , and is slightly inferior in hygroscopicity and moisture absorption speed, and because it was pulled too much when the fabric was set, an air layer was formed in the stitches, and the thermal characteristics are as shown in Table 1. It was. Subsequently, the underwear (for the upper body) was sewn so that the sinker loop side would be the surface that touched the skin, and the sensory test was performed by the method of sensory test A. The evaluation results are shown in Table 1. The sensation of coldness was not good and it was judged that he felt a little stuffy.

[Example 9]
Using the fabric 4 obtained in Example 4, long-sleeved sports unders and spats were sewed so that the sinker loop side would be a surface that touched the skin, and the sensory test was performed by the sensory test B method. The evaluation results are shown in Table 2. The sensation of cooling and heat dissipation was high, and it was judged that it was difficult to feel stuffiness, sweat, and coldness.

[Example 10]
With the fabric 7 obtained in Example 7, a summer skin cover and a mattress cover were created so that the needle loop side would be a surface that touched the skin. Table 3 shows the results of the sensory test conducted by the sensory test C on the monitor. It was judged that the feeling of cooling and heat dissipation were high and it was difficult to feel stuffiness.

[Comparative Example 6]
A false twisted filament obtained by false twisting a 110 dtexf round cross-section polyester by a known method and a 33 dtex 3f polyurethane elastic fiber are combined on a 28G single circular knitting machine using a positive feed device, and the polyester blend ratio is 90%. As a result, a bare tengu with a polyurethane elastic fiber mixing ratio of 10% was obtained. This dough was preset and then scoured and dyed using a liquid dyeing machine. After the final setting, a dough 13 having 62 courses and 44 wales was obtained. This fabric was not mixed with regenerated cellulose fiber, was inferior in hygroscopicity and hygroscopic speed, and the thermal characteristics were not good as shown in Table 2. Subsequently, a long-sleeved sports underwear and spats that were sewn so that the sinker loop side would be a surface that touched the skin were worn, and the sensory test was performed on the monitor by the sensory test B method. The evaluation results are shown in Table 2. It was judged that the feeling of cooling and heat dissipation was not good, the stuffiness and water absorption performance were insufficient, the remaining sweat of the skin was much, and the cold caused by the liquid layer adhering to the fiber surface was easily felt.

[Comparative Example 7]
Without putting on long-sleeved sports underwear and spats, the sensory test was conducted on the monitor by the method of sensory test B using only briefs and sportswear top and bottom. The evaluation results are shown in Table 2. Without wearing a sports underwear, it was determined that the feeling of cooling and heat dissipation was low, the sweat was steamed without being effectively dissipated, and the remaining sweat of the skin was very much, so that it felt cold at rest.

[Comparative Example 8]
With the fabric 13 obtained in Comparative Example 6, a summer skin cover and a mattress cover were created so that the needle loop side would be a surface touching the skin. Table 3 shows the results of the sensory test conducted by the sensory test C on the monitor. It was judged that the feeling of cooling and heat dissipation was low and it was easy to feel stuffiness.

  The textile product of the present invention, for example, underwear, increases heat transfer and thermal conductivity due to contact at the time of wearing, and suppresses temperature rise in clothes, and at the same time, effectively absorbs insensitive moisture and suppresses increase in humidity in clothes. By doing so, it is possible to provide summer underwear that takes a long time to feel comfortable from the beginning of wearing to undressing. The underwear of the present invention has higher thermophysiological comfort when worn rather than not worn.

Claims (5)

A fiber product comprising a knitted fabric in which regenerated cellulose fibers are mixed in an amount of 20% by weight or more and the single cellulose fineness of the regenerated cellulose fibers constituting the fabric is 0.8 dtex or more and 4 dtex or less, and the filling density of the fabric is 0.260 g. / cm ³ or more 0.500 g / cm ³ or less, der least one surface of the heat dissipation value 10W / m ² · ℃ or more dough is, and, at least one side of the instantaneous heat flux value of the dough 120 W / Textile products made of fabric that is m ² · ° C or higher . Hygroscopic fabric is 5% or more, the fiber product of claim 1. Polyurethane elastic fiber is used together less than 30% 3% of the fabric weight, fiber product according to claim to claim 1 or 2. The knitted fabric is a bare plain tissues, textile product according to any one of claims 1-3. The textile product according to any one of claims 1 to 4 , which is used as an underwear.