JPH04272257A - Web giving excellent refreshing property - Google Patents

Abstract

PURPOSE:To provide a web free from a stuffy and steamy state and giving a comfortable wearing touch, when used for clothes. CONSTITUTION:A web having an excellent refreshing property is characterized by containing hydrophilic fibers and hydrophobic fibers each having a modified cross section, the fibers being doubled or employed as warps and wefts, respectively, to contact each other, the ratio by weight of the hydrophobic fibers to the hydrophilic fibers being 100:20, and he area of the hydrophilic fibers occupies >=20% of all area of the fibers exposed on the surface of the web.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric with excellent cooling properties. More specifically, the present invention relates to a cool fabric suitable for summer clothing, bedding, and the like.

0002

BACKGROUND OF THE INVENTION Generally, cool fabrics are preferred as materials for summer clothing, bedding, etc., and various studies have been made regarding such materials. Currently on the market, there are fabrics using hydrophilic fibers such as cotton, linen, rayon, and cupra, hydrophobic fibers such as polyester that have been given water absorption properties, and fabrics that are composites of these fibers. .

[0003] However, although these fabrics using only hydrophilic fibers have good sweat absorption and heat dissipation properties, they retain excessive moisture, so when used as clothing, It tends to get sticky and stuffy and is not very comfortable. In addition, when using hydrophobic fibers that have water absorption properties, the fibers themselves do not retain water, so the amount of sweat absorption is insufficient, and when worn as clothing,
Sweat remains between your clothes and your body, making it uncomfortable. Furthermore, in the case of a fabric that is a composite of hydrophilic fibers and hydrophobic fibers, the above effects are not improved, and when this fabric is used as clothing, it tends to become sticky and stuffy, making it not very comfortable. There was a problem.

0004

[Problems to be Solved by the Invention] The object of the present invention is to improve the above-mentioned drawbacks of conventional fabrics, and to provide a comfortable wearing feeling without heat build-up or stuffiness when worn as clothing. This provides a fabric with excellent cooling properties.

[0005]

[Means for Solving the Problems] That is, the present invention provides a fabric including hydrophilic fibers and hydrophobic fibers having an irregular cross section, wherein the weight of the hydrophobic fibers having an irregular cross section is equal to the weight of the hydrophilic fibers. 100 to 20 or more, and the hydrophilic fibers and the hydrophobic fibers having irregular cross sections are in contact with each other, and further, the area of the hydrophilic fibers is 20 to 100 to the total area of the fibers exposed on the surface of the fabric. It is a fabric with excellent cooling properties that accounts for more than %.

[0006] Hydrophilic fabrics used in the present invention include cotton, linen, cupro, rayon, and the like. These fibers have a high moisture content, moisture absorption and release properties, and high thermal conductivity. For this reason, when fabrics made of these materials are worn as clothing, they allow the heat radiated from the body to escape, and when you sweat, they quickly absorb sweat. In a wearing experiment conducted by the present inventors, in order for the wearer to feel comfortable without trapping heat and preventing sweat from accumulating between the clothing and the body, the total area of the hydrophilic fibers exposed on the skin side surface must be It needs to account for 20% or more; if it is less than 20%, heat will be trapped and sweat absorption will be poor, making it not comfortable.

[0007] Heat dissipation is also affected by the composition of the fibers, and a composition with a small number of air layers with low thermal conductivity allows heat to dissipate more easily. That is, filament yarns with less fuzz are preferably used. Also, it is desirable that the structure be dense. Next, the fabric of the present invention is characterized in that it contains 20 or more hydrophobic fibers having irregular cross-sections per 100 hydrophilic fibers, and the hydrophilic fibers and the irregular cross-section fibers are in contact with each other. Hydrophobic fibers with irregular cross sections include L-shaped cross sections;
It is a cross-shaped fiber, and its materials include nylon and polyester.

[0008] Hydrophobic fibers having irregular cross-sections include concave portions, so water is easily trapped in the concave portions and water is easily diffused therein. Also, unlike hydrophilic fibers, it retains water through the physical effects of its shape, so it has excellent quick-drying properties. This performance is good when the weight ratio of hydrophobic fibers having irregular cross sections is 20 or more, preferably 30 or more, to 100 parts of hydrophilic fibers. Hydrophobic fibers with irregular cross sections are hydrophilic fibers 1
00, whereas if it is less than 20, the diffusion ability of the hydrophobic fibers with irregular cross sections is inferior to the water absorption ability of the hydrophilic fibers, and as a result, the amount of water absorption decreases and the water retained by the hydrophilic fibers is large. This is because when worn as clothing, it becomes sticky and stuffy, which is undesirable.

[0009] Furthermore, when considering the structure in terms of knitted structure, woven structure, etc., if there is a large deviation in the distribution of hydrophilic fibers and irregular cross-section fibers in the fabric, when worn as clothing,
Water absorption and diffusion performance does not work well. In order to take advantage of this function, any part of the fabric must be approximately 10cm x 10cm.
The area of hydrophilic fibers is 20% or more of the total area of fibers exposed on the surface of the fabric of m, and the area is approximately 10 cm x 10 cm.
It is desirable that the weight of the hydrophobic fibers having irregular cross sections be 20 or more per 100 of the weight of the hydrophilic fibers in a fabric of 1.5 cm.

Furthermore, since the present invention is characterized in that hydrophilic fibers and hydrophobic fibers having irregular cross sections are in contact with each other,
The hydrophobic fibers with irregular cross sections diffuse the water absorbed by the hydrophilic fibers, and due to the diffusion, it is possible to dry quickly. Therefore, when this fabric is worn as clothing, sweat does not accumulate between the clothing and the body, making it less stuffy and comfortable. The contacting methods include a method of combining and twisting hydrophilic fibers and irregular cross-section fibers, a method of mixing hydrophilic fibers and irregular cross-section fibers to form a single fiber, or a method of making hydrophilic fibers into warp yarns and twisting them into a single fiber. Examples include a method in which cross-sectional fibers are made into weft threads and interwoven, and a method in which hydrophilic fibers and irregular cross-sectional fibers are knitted together. In particular, hydrophilic fibers and irregular cross-section yarns are
Those twisted and twisted 00 to 700 times are preferable, and since the contact area is large, the effect of diffusing water is also large, so it is preferable.

[0011] In addition, ordinary polyester fibers are preferably used for the portions of the fabric of the present invention other than the hydrophilic fibers and irregular cross-section fibers, but in order to improve heat dissipation properties, it is necessary to use hydrophilic fibers and other fibers. The sum of the weights of the hydrophobic fibers having irregular cross sections is preferably 20 or more per 100 of the weight of the fabric. The appropriate weight of the fabric is 70 to 250 g/m2, and the structure is preferably dense with few air spaces. Furthermore, when the fabric of the present invention is used as a part of clothing, it is preferably 30% or more of the weight of the clothing,
It is especially effective when used on areas that sweat a lot, such as the chest and back.

0012

EXAMPLES The present invention will be explained in more detail below using examples.

[0013]

[Examples 1 to 4, Comparative Example 1] Rayon filament yarn 7
5d/36f and polyester L-shaped cross section thread 30d/24f
Using a 28-gauge single circular knitting machine, knit the yarn (designated A) that was twisted 500 times/m using a double twister and polyester regular yarn 75d/36f (designated B) into a border as shown in Table 1. Ta. Thereafter, these knitted fabrics were scoured, dyed, dried, and finished using conventional methods, and their heat loss during insensible evaporation, water absorption, and quick-drying properties were evaluated. In addition, these knitted fabrics were made into running shirts and tested on actual wear. These evaluation methods are shown below, and the evaluation results are shown in Table 2.
Shown below. (Heat loss during insensible evaporation) Under an environment of 20°C x 65% RH, ThermoLab II (KES manufactured by Kato Tech Co., Ltd.)
-F7) on a 10cm x 10cm hot plate.
m x 10 cm Toyo filter paper No. Place something containing 3.2 times its own weight of water on 2, and place a 15cm x 15cm x
Place a 2mm styrofoam spacer with a 10cm x 10cm square hole in the center.

Furthermore, to prevent the sample fabric from sagging, an acrylic plate or the like having a square hole of about 20 cm x 20 cm is placed with about 5 strands of 150 d polyester monofilament thread strung vertically and horizontally. Furthermore, place a 15cm x 15cm sample fabric on top of that, and a 15cm x 15cm sample fabric.
m x 2 mm styrofoam with 10 cm x 10 c in the center
Glue the specimen with double-sided tape to a sample fixing plate with an M-sized square hole and place it with the skin side facing down. Attach the spacer and sample sufficiently with tape, etc. to prevent heat leakage. In that state, maintain the wind speed at 10 cm/min, and place the hot plate at room temperature + 10°C.
The heat loss (W) when maintaining the temperature is calculated from the average value of the three measurement samples using the following formula.

[0015]
W×100 Heat loss in a state containing moisture = ──────(W/m2
・℃)
The heat loss obtained by the method of 10 or more is considered to be a heat loss corresponding to insensible evaporation when there is sufficient moisture in the vapor phase between the sample fabric and the hot plate. If this value is 28W/m2・℃ or more,
You can feel cool when you actually wear it. (Water absorption) Place a sample fabric with a diameter of 6 cm on top of a glass filter containing water at 20°C, contact it with a load of 476.5 g, and read the amount of water absorbed with a water absorption measuring tube (Larose method) .

[0016] The water absorption rate is calculated using the following formula.
Water absorption (ml)
Water absorption rate (%) = ──────────
×100
Weight of sample fabric (g) (quick drying) 30cm x 30c
After soaking the sample fabric in 20°C water, it was dehydrated for 5 minutes in the dehydration tank of a domestic washing machine, and then left in a constant temperature room maintained at 30°C x 70%. The drying rate after 30 minutes is calculated using the following formula.

Weight after 30 minutes (g) - Weight immediately after dehydration (g) Drying rate (%) =
──────────────────── ×10
0
Weight of sample fabric (g) (actual wear test) Five wearers wore the sample in an environment of 30°C x 70% RH,
The wearability was determined by riding an exercise bike with a load of 80W for 15 minutes. 3 points for feeling cool and 1 point for hot
Points: 0 points for those who can't answer either question, and the total score for 5 people is 13.
A score of ◎ or above, ◯ for 12 to 11, △ for 10 to 8, and × for 7 or less.

Examples containing 20% or more of hydrophilic fibers had good heat dissipation, sweat absorption, quick drying properties, and comfortable feeling when worn.

[0019]

[Examples 5 to 8, Comparative Examples 2 to 3] Using the yarns shown in Table 3, each of the warp and weft yarns was twisted 500 times/m using a ring twisting machine and woven into a plain weave using a water jet loom. They were refined and dyed in the same manner as in Examples 1 to 4, and then evaluated. The results are shown in Table 4. In addition, when observing the twisted yarn part of the woven fabric, rayon can be seen on 70% of the surface of the combined twisted yarn of rayon 75d/36f and ester 50d/36f, and the surface of the combined twisted yarn of rayon 50d/36f and ester 50d/36f. Rayon was found in 60% of the cases.

[0020]

[Comparative Examples 4-5] Rayon filament yarn 75d/36
Threads obtained by twisting 30d/24f of polyester regular yarn 500 times/m using a ring twisting machine (referred to as C) and regular polyester yarn 100d/48f (referred to as B) were twisted using a 28-gauge circular knitting machine. The fabric was knitted into a border as shown in No. 5, and scoured, dyed, and finished in the same manner as in Examples 1 to 4, and then evaluated. The results are shown in Table 6. In addition, when observing the twisted yarn part of the knitted fabric, 80% of what came out on the back side was rayon yarn.

[0021] Rayon filament and polyester regular yarn do not exhibit water absorption-diffusion cooperation, and both water absorption and quick drying performance are unfavorable.

[0022]

[Table 1]

[0023]

[Table 2]

[0024]

[Table 3]

[0025]

[Table 4]

[0026]

[Table 5]

[0027]

[Table 6]

[0028]

[Effects of the Invention] The fabric of the present invention has excellent heat dissipation and water absorption properties because the hydrophilic fibers account for 20% or more of the total area of the fibers exposed on one surface. In addition, the weight of the hydrophobic fibers having irregular cross sections is 20 or more per 100 weight of the hydrophilic fibers, and since the hydrophilic fibers and the hydrophobic fibers having irregular cross sections are in contact with each other, water is absorbed by the hydrophilic fibers. Hydrophobic fibers with irregular cross sections can effectively diffuse and release water. Therefore, when the fabric of the present invention is worn as clothing, heat is not trapped, and even if the fabric sweats, it quickly absorbs sweat, and the inside of the clothing does not get stuffy, making it possible to keep the clothing comfortable.

Claims (1)

[Claims] 1. A fabric comprising hydrophilic fibers and hydrophobic fibers with irregular cross sections, wherein the weight of the hydrophobic fibers with irregular cross sections is 20 or more per 100 weight of the hydrophilic fibers, and The hydrophilic fibers and the hydrophobic fibers having irregular cross sections are in contact with each other, and the area of the hydrophilic fibers accounts for 20% or more of the total area of the fibers exposed on the surface of the fabric. Fabric with excellent cooling properties.