JPS63182435A - Fabric excellent in contact hot and cold feeling - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a fabric with excellent contact thermal sensation.

(Prior Art) Fabrics made of blended yarns of polyester staple fibers and cotton fibers are often used in public bathing costumes worn in Middle Eastern countries, particularly in desert areas. This fabric provides the dust resistance required by desert environments.

(Problems to be Solved by the Invention) However, although this fabric made of a blended yarn of polyester staple fibers and cotton fibers exhibits excellent dust resistance, it lacks the thermal contact sensation particularly required in desert areas. This contact thermal sensation is felt the moment the skin touches the fabric, and is related to the amount and speed of heat transfer from the skin to the fabric. In addition, the drapability and softness of the garments, which reinforce the thermal sensation on contact, are insufficient, and the luster is also poor. The present invention solves the drawbacks of the conventional fabrics used in public bathing costumes and provides a fabric with excellent thermal sensation to the touch.

(Means for Solving the Problems) In order to solve the problems, the present invention employs the following configuration. That is, the present invention is a fabric made of a blended yarn of polyester stable fibers having a fineness of 1.2 denier or less and recycled fibers having a fineness of 1.2 denier or less, and which has a maximum heat flow rate of 0.05''. 2
The fabric has excellent contact thermal sensation, with a cover factor ranging from 25.0 to 36.0.

The present invention will be explained in detail below. The blended yarn in the present invention is composed of polyester staple fibers having a fineness of 1.2 denier or less and recycled fibers having a fineness of 1.2 denier or less. The blend of polyester staple fibers and recycled fibers was chosen because the hydrophobic properties of the polyester staple fibers and the hygroscopic properties of the recycled fibers create a strong contact thermal sensation. The polyester of the polyester staple fiber may be one consisting of polyethylene terephthalate, a copolymer polyester in which 80 mol% or more of the main repeating units are ethylene terephthalate, or a polyester containing 5 mol% or less of a matting agent, a coloring pigment, or a stabilizer. No problem. The fineness of the polyester staple fiber is 1.2 f' denier or less, preferably 0.1 to 1.2 denier, more preferably 0.1 to 1.0 denier, particularly preferably 0.1 to 0.9 denier. The fine denier was selected because, together with its hydrophobic nature, it provides a strong thermal sensation to the touch.

In addition, staple fibers may be cut to either unequal length or equal length, but those cut to equal length with an average fiber length of 25 to 5111 mix well with the recycled fibers described below and have the effect of contact thermal sensation. It is preferable for serving.

On the other hand, recycled fibers refer to rayon such as polynosic, cupro, and the like. The fineness of the recycled fibers must be the same as that of the polyester staple fibers mentioned above, and must be less than 1.2 denier. This is because both are made to have a fine denier to increase softness, improve drapability, give a silk-like luster, and provide a strong thermal sensation to the touch.

In this sense, the fineness of the staple fiber of the recycled fiber is
Preferably 0.1-1.2 denier, more preferably 0.1-1.0 denier, particularly preferably 0.1-0.
It is 8 denier. Among the recycled fibers, polynosic is preferred because it produces a silk-like luster. The recycled fibers may be cut to either equal length or unequal length, but cut to equal length is preferred. The average fiber length is also preferably 25 to 51 mm. The ratio of the polyester staple fiber to the blended yarn is preferably 20 to 80% by weight. However, this is to fully bring out the characteristics of both. Further, the twist coefficient of the blended yarn is T/v'Ne, where the number of twists (T/In) is T1, where Ne is the English cotton count, and is preferably 3 to 4.

Next, the thickness of the blended yarn is 30/l for a single yarn when expressed in English cotton count based on the relationship with the maximum heat flow rate described below.
's ~ 100 / I Is, 40/2'5-2 with double thread
00/2's is preferred. The thinner the wire (the larger the number), the higher the maximum heat flow velocity, and the thicker the wire, the lower the maximum heat flow velocity.

Furthermore, the woven fabric made of such blended yarns must have a specific configuration. That is, the fabric must have a specific cover factor. If the cover factor is less than 25.0, the dustproof property will be impaired and it will become unsuitable for use in desert areas. On the other hand, if the cover factor exceeds 36.0, the softness of the blended yarn will be lost, resulting in a paper-like fabric lacking drapability, which is not preferable. Therefore, the cover factor is 25.0
It is preferable to keep it in the range of ~36.0. Here, the cover factor is defined by the following equation.

Here, 0 pieces and DW are the warp and weft densities (pieces/weft), respectively.
(inch), NT, and NW are the English cotton counts of the warp and weft, respectively.

Furthermore, even for a fabric that satisfies such a cover factor, the maximum heat flow velocity must be within a certain range to provide a thermal contact sensation, that is, a degree of coolness. This maximum heat flow rate is between 0.05 and 0.20 cal/cJ-sec, preferably between 0.05 and 0.15 cat/cJ-sec.
must be within the range. Maximum heat flow rate is 0.05
If the cal / d-sac is not grooved, it will be difficult to feel cool, and on the other hand, 0.206Bl/cl・se
If it exceeds e, it will become too cold and uncomfortable to wear. Therefore, in order to have excellent contact thermal sensation, the above-mentioned 0.0
5 = 0.20 cal/cJ -5ec. This maximum heat flow rate was measured using ThermoLab (manufactured by Kato Iron Works). The principle of this measurement is to measure the rate of heat absorption into the sample from the degree of temperature drop of the heat source plate when the heat source plate, which has been given a constant amount of heat equivalent to the skin temperature of the human body, is brought into contact with the sample, and the average value of three times is calculated. Hail. The larger the maximum heat flow rate (caffi/cJ-sec), the colder the contact thermal sensation. The size of the sample used for this measurement is 70 x 7 am.

This maximum heat flow rate takes a larger value as the thickness of the blended yarn becomes thinner, and the maximum heat flow rate takes a smaller value as the cover factor increases. Therefore, the maximum heat flow rate must be kept within the above range by taking both of these into consideration. That is, a fabric with a cover factor in the specific range described above using a blended yarn of a specific polyester stable and a specific regenerated fiber with a count in a specific range titrates the contact thermal sensation as defined in the present invention. be.

Here, an example of the method for producing a woven fabric with excellent contact thermal sensation according to the present invention will be described.

First, raw cotton of polyester staple fiber with a fineness of 1.2 denier or less and raw cotton of recycled fiber with a fineness of 1.2 denier or less are supplied to a blend batting machine at a fixed ratio to produce a blended wrap. Blended yarn is manufactured through carding, filament, roving, and spinning processes. This blended yarn is woven with a predetermined cover factor using a loom with a frame or without a shuttle.

(Example) Example 1 Polyester staple fiber, 1 m (0.7 denier, 3
The raw cotton of polynosic fiber (1.0 denier, fiber length 38 snow - equal length cut) is mixed with a cotton blending machine at a weight percentage of 85:35, and the 45”S (
A blended yarn of English cotton count) was spun. Then, using this blended yarn, a plain fabric having a width of 97.7 am was woven using a Shirttle loom at a warp density of 124 threads/inch and a weft density of 84 threads/inch. As a comparative example, polyester staple fiber (1
, 4 denier, fiber length 38, cut to equal length) and cotton fiber at a ratio of 65:35 by weight to produce a 45"S blended yarn, weave a similar plain weave, and evaluate the tensile properties and shear properties of both. The properties, bending properties, compression properties, maximum heat flow rate, etc. were determined and shown in Table 1.

Below is the margin Table 1 0; Silk-like gloss ×; Normal gloss The tensile properties, shear properties, bending properties, and compression properties are as follows:
KES described in Standardization and Analysis of Texture Evaluation (Text Measurement and Standardization Research Committee, published in 1980, p. 36)
-F system (Kavabata'5Evaluatl
on System). This force measurement method mechanically analyzes textures of textiles such as slime, stiffness, bulge, stiffness, and stiffness, which traditionally relied on the senses of experts, and calculates mechanical values that are closely related to each texture. The stiffness G of shear characteristics is the value obtained by dividing the shear force per unit width by the shear angle, 28G is the hysteresis at a shear angle of 0.5 m, and 2HG is the hysteresis at a shear angle of 5 m. , rigidity B represents the bending rigidity per unit length, and 2HB represents the hysteresis.The amount of heat given to the heat source plate in the measurement of the maximum heat flow rate was 50kc.
It was affi/rII@hr.

As is clear from Table 1, the product according to the present invention is softer than the comparative example as judged from the tensile properties, shear properties, bending properties, and compression properties, and is softer than the comparative example judging from the bending properties. It had excellent drape properties compared to the examples. Regarding the maximum heat flow rate, the example had a much "cooler" feeling than the comparative example, and had an excellent contact thermal sensation. In addition, regarding gloss, the examples had better silk-like gloss.

(Effects of the Invention) As described above, according to the present invention, it has a cool feeling, has excellent moisture absorption, is soft and has an excellent silky luster, and has excellent drapability, and can be worn in Middle Eastern countries, especially desert areas. Even in such cases, the dust resistance is satisfactory, and especially in such areas, a fabric with excellent contact thermal sensation, including a cool feeling and other excellent properties mentioned above, can be obtained.

Claims (1)

[Claims] A woven fabric made of a blended yarn of polyester staple fibers with a fineness of 1.2 denier or less and recycled fibers with a fineness of 1.2 denier or less, which has a maximum heat flow rate of 0.05 to 0.2.
A woven fabric with excellent contact thermal sensation, which is in the range of 0 cal/cm^2·sec and has a cover factor in the range of 25.0 to 36.0.