JPH0351342A - Cloth for bathrobe - Google Patents

Abstract

PURPOSE:To obtain a cloth for bathrobe, capable of providing a finished state of simple ironing comparable to that of sizing and ironing by weaving yarn containing a specific amount of specified conjugate fiber containing a high- softening point polyerster polymer as a core component and a low-softening point polyester polymer as a sheath component. CONSTITUTION:A cloth for bathrobe, obtained by spinning a high-softening point polyester polymer having >=240 deg.C softening point as a core component and a low-softening point polyester polymer having 70-180 deg.C softening point as a sheath component, providing conjugate fiber having >=60%, preferably the whole perimeter of cross sectional perimeter of the core component covered with a sheath component having 0.5-5mu thickness and weaving yarn containing 3-20wt.% preferably 5-15wt.% aforementioned conjugate yarn and capable of providing the bathrobe, having hand and pleasantly wearable with hardly any creasing in wearing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to yukata fabric. More specifically, the purpose is to provide a yukata fabric that can give a crisp finish similar to that obtained by starching and ironing the yukata during washing by simply ironing the yukata.

[Conventional Technology J] Conventional yukata fabrics are made of natural fibers, mainly cotton, or are made of blended yarns of natural fibers and synthetic fibers. After gluing, the cloth is ironed to give it a crisp finish. A yukata that is simply starched and dried after washing has wrinkles that leave an unsightly appearance and a rough feel when worn, meaning that it is not comfortable to wear. On the other hand, a yukata that has been washed without being starched, dried, and ironed has no wrinkles and looks good, but it has the disadvantage that it feels less tight and wrinkled immediately after being worn.

Problem to be Solved by ER Ming J The object of the present invention is to avoid the problems of the prior art described above, to maintain the texture suitable for a yukata, and to make it crisp by ironing without starching during washing. To provide a yukata that can be finished with a soft finish, is resistant to wrinkles when worn, and is comfortable to wear.

[Means for Solving the Problems J] The object of the present invention is to use a polymer made of a high softening point polyester having a softening point of 240'C or more as a core component, and a polymer made of a low softening point polyester having a softening point of 70 to 180'C. The sheath component is a polymer of This can be achieved with yukata fabric.

The present invention will be explained in detail below.

In the composite fiber of the present invention, the low softening point polyester forming the sheath component needs to have a softening point of 70 to 180'C. If the softening point is less than 70''C, the spinnability and drawability of the composite fiber will be poor, and even if the yukata is ironed, it will become plate-like and have a rough and hard texture. If it exceeds iao'c, it will feel crisp when ironed, but it will not hold well after that.

The low softening point polyester having a softening point of 70 to 180°C constituting the above-mentioned sheath component includes polyesters containing polyalkylene terephthalate and polyalkylene isophthalate as main components, among which polyesters containing the former terephthalic acid as the main acid component, Alkylene glycol components having 2 to 6 carbon atoms, ethylene glycol, trimethylene glycol,
A polyester obtained by copolymerizing 30 to 50 mol % of a third component to a polyester whose main glycol component is tetramethylene glycol, pentamethylene glycol, or hexamethylene glycol is preferable.

Examples of the third component to be copolymerized include isophthalic acid,
Examples include adipic acid, sebacic acid, glycolic acid, polyethylene glycol, polypropylene glycol, and polytetramethylene glycol, among which isophthalic acid is preferred, and polyethylene terephthalate with a copolymerization rate of 30 to 50 mol% is preferred. It is more preferable that the copolymerization rate of isophthalic acid is 35 to 45 mol%. If the copolymerization rate of isophthalic acid is less than 30 mol%, the fluidity of the polymer will be too low when heated, so when ironing a yukata, the composite fibers in the yarn or other w
It is not preferable because it has poor adhesion with the 4-fiber and cannot produce a crisp finish. If it exceeds 50 mol%, the softening point will not be lowered, resulting in lower adhesion efficiency between fibers, difficulty in handling during spinning, and increased cost.
This is not preferred because it causes drawbacks such as a decrease in fiber strength.

The endothermic heat amount measured by differential scanning calorimeter is preferably low crystallinity (2 Cat/l) or less, more preferably substantially Oca
l/g. If the endothermic heat amount is larger than 2 cal/Q, the adhesion will be poor, which is not preferable.

The intrinsic viscosity of the low softening point polyester is preferably 0.60 or less. If the intrinsic viscosity exceeds 0.60, the viscosity of the polymer is so high that fluidity due to heating during ironing decreases and adhesion between fibers deteriorates, which is not preferable. Therefore, the intrinsic viscosity is more preferably 0.55 or less.

The softening point of the high softening point polyester constituting the core component of the present invention described above must be 240'C or higher. If the softening point is less than 240'C, both the spinning and drawing properties of the composite fiber are poor, making industrial production difficult.

The above-mentioned high softening point polyester having a softening point of 240°C or higher refers to polyethylene terephthalate, which has terephthalic acid or its ester as a dicarboxylic acid component and ethylene glycol as a glycol component. It may be a mixture. The intrinsic viscosity of the high softening point polyester is preferably 0.55 or more.

If the intrinsic viscosity is less than 0.55, it is not preferable because the spinning properties and higher processability such as weaving properties deteriorate. More preferably, the high softening point polyester has an intrinsic viscosity of 0.60 or more.

The fiber form consists of a sheath component made of low softening point polyester,
It is necessary to adhere to at least 60% of the cross-sectional circumference of the core component made of high softening point polyester to a thickness of 0.5 to 5 microns.

If the thickness of the sheath component is more than 5 microns, not only will the spinning properties deteriorate, but the texture of the yukata after ironing will become rough and hard, making it difficult to wear comfortably.

On the other hand, if the thickness of the sheath component is less than 0.5 microns, the adhesion during ironing will not be sufficient and the yukata will not be crisp. In addition, the low softening point polymer is
If it occupies less than %, there will be insufficient bonded parts and the result will be non-uniform, making it impossible to obtain a crispy yukata.

A preferred fiber form is a core-N composite fiber consisting of substantially concentric circles having a core made of high softening point polyester and a low softening point polyester sheath.

The proportion of the high softening point polyester in the composite mu is preferably 50% by weight or more. If the ratio is less than 50%, the tenacity of the fibers becomes low and the spinning properties and high-order processability are deteriorated, which is not preferable. The ratio is appropriately set within 50% by weight or more so that the thickness of the sheath component is in the range of 0.5 to 5 microns depending on the fineness of the composite fiber.

The above-mentioned conjugate fibers are mixed with cotton, hemp, or other synthetic fibers to form yarn, but in this case, the content of the conjugate fibers must be 3 to 20% by weight. When the content is less than 3% by weight, when ironing a yukata, the adhesion between composite fibers and mixed fibers due to heating is sometimes poor, and a crisp yukata cannot be obtained.

Furthermore, if the content exceeds 20% by weight, not only will the unique texture of cotton or linen be lost, but also the adhesiveness of ironing will be too high due to the heat applied during ironing, resulting in a rough and stiff yukata, which is not good. . The properties of composite fibers vary depending on the softening point of the low softening point polyester of the sheath component, the surface occupancy of the sheath component, the thickness of the sheath component, the thickness of the mixed yarn, the property M of the fibers to be mixed, etc. The content may be appropriately selected within the range of 3 to 20% by weight, but the preferred content is 5 to 15% by weight.

The yukata fabric of the present invention can be produced, for example, by the following method.

First, a conjugate fiber that is mixed at 3 to 20% by weight when it is made into a mixed yarn can be manufactured by the following manufacturing method. That is, polyethylene terephthalate copolymerized with 30 to 50 mol% of isophthalic acid and having an intrinsic viscosity of 0.60 or less is used as a sheath component, and polyethylene terephthalate with an intrinsic viscosity of 0.60 or more at a softening point of 240°C or higher is used as a core component, and the fiber is spun. temperature 290
The fibers are spun and wound at a spinning speed of 500 to 2500 m/min.

Then, it is stretched, crimped, and cut into short fibers. The heat history in the manufacturing process from stretching to cutting is preferably set to a temperature below the softening point of the low softening point polyester.

The composite material thus produced is blended with cotton at a concentration of 3 to 20% v1 to form a spun yarn. Add 1 to the obtained spun yarn in the usual way! Weave, finish, cut, and sew to create yukata fabric. As mentioned above, it is preferable to use them as short fibers, but as for the production method of mixed fiber yarns, there are cases where the drawn yarns are used as they are, or they are mixed in higher-order processes, such as when the drawn yarns are used as false twisted yarns. It can be selected as appropriate depending on the fiber method.

The yukata fabric as used in the present invention is a fabric used for a ``yukata'' that is usually worn after taking a bath. -The inside of the shell is often worn in summer in ordinary households, and is often worn after bathing in inns and hotels regardless of the season. By the way, since ``Yukata'' comes into direct contact with the skin, the feeling of wearing it is very important.
Therefore, the texture characteristics of the fabric for yukata are important.

[Example] The present invention will be explained below with reference to Examples.

In addition, polyester and polyester I! in the examples.
The following methods were used to measure each characteristic value of the fibers.

(Intrinsic viscosity) The fibers are dissolved in chloroform and separated into low softening point polymers and high softening point polymers. O-
This is the value measured at 25°G after dissolving in talolophenol.

(Endothermic heat value) Using a differential scanning calorimeter (PerkinElmer 1 [)SC4 model], 10 mCl of the sample was heated at 16°C under a nitrogen atmosphere.
70'C to 180°C when measured at a heating rate of /min.
This is the amount of endothermic heat generated during

(Softening point of low softening point polymer) Place two fibers together so that they intersect under a melting point microscope.
The temperature is increased at a rate of °C/min, and the temperature at which the two stacked fibers become one is defined as the softening point.

(Softening point of high softening point polymer) Using a differential scanning calorimeter (Model DSC4 manufactured by PerkinElmer), when io mg of a sample was heated at a rate of 16°C/min in a nitrogen atmosphere, the temperature ranged from 200°C to 260°C. The endothermic peak temperature that occurs during this period is defined as the softening point.

(Shakiness and Feel) The shakiness and feel was determined by sensory evaluation based on touch by five experienced texture judges. A yukata made of 100% cotton spun yarn was washed in a washing machine, and the crispness and feel of the product after drying was rated as 1st grade, and the yukata was starched during washing, dried, and ironed, and the crispness and feel of the product was rated 5th grade. . The conditions for gluing are as follows.

Thickening agent "Shakit J" manufactured by Nilion Co., Ltd. (contains vinyl acetate fluorescent agent) Conditions: Yukata: Commercially available yukata 2 Amount of water applied: 20 liters Thickening agent: 30 ml Stirring time: 5 minutes Example 1 High Polyethylene terephthalate with an intrinsic viscosity of 0.65 and a softening point of 250'C (measured by differential scanning calorimeter) as a softening point polymer, and isophthalic acid 40 as a low softening point polymer.
Mol% copolymerized polyethylene terephthalate with an intrinsic viscosity of 0.55 was dried under reduced pressure at 160°C and 70°C for 10 hours, respectively, and the core/M ratio was determined using a high softening point polymer as a core component and a low softening point polymer as a sheath component. The discharge amount was set to be 75/25, and melt spinning was carried out from a concentric ring composite type spinneret at a spinning speed of 1200 ml/min to obtain an undrawn yarn of 365 denier and 36 filaments. The obtained undrawn yarn was subjected to 3.
Stretched at a magnification of 4 times (80 m/min) in a hot water bath at 80°C, crimped using a push-in type crimping device. Manufactured. The fiber morphology of the obtained fiber was a complete concentric core-sheath composite, and the thickness of the sheath component was 1.2 microns. Further, the endothermic heat amount of the low softening point polymer measured by a differential scanning calorimeter could not be detected, indicating that the polymer was substantially amorphous. Also, this fiber has a melting point @
The softening point measured with a microscope was 102°C.

The 1q composite m-fiber short fibers were blended with cotton fibers at a content of 10% by weight to obtain a spun yarn, which was then woven into a plain weave and finished to obtain a yukata fabric. 120'C on Yukata fabric
As a result of ironing at a temperature of The results are shown in Table 7 along with comparative examples.

Comparative Examples 1 to 8 As shown in Table 1, Comparative Examples 1 and 2 are composite I!
The thickness of the low softening point polymer sheath was 7 microns and 0.5 microns, respectively.
It was set to 3 microns. In Comparative Example 3 and Comparative Example 4, the blending ratio of short fibers of the composite fiber was 2% and 25%, respectively. In Comparative Example 5, the high softening point polymer had a softening point of 210°C. Comparative example 6 is
The spinneret was changed to make the fiber form of the composite fiber bimetallic, and the surface occupancy rate of the low softening point polymer was 50%.

In Comparative Examples 7 and 8, the softening point of the low softening point polymer was 60'.
(:) The conditions were the same as in Example 1 except that the temperature was 200°C.

Comparative Example 1 had poor spinnability and the yukata fabric after ironing was coarse and hard. In Comparative Example 2, the yukata fabric did not become crisp even after ironing. Comparative Example 3 was similar to Comparative Example 2. In Comparative Example 4, the cotton texture was lost and the yukata fabric was rough and hard after ironing. Comparative Example 5 had poor spinning and drawing properties, making industrial production impossible. Comparative Examples 6 and 8 were similar to Comparative Example 2. Comparative Example 7 had poor spinning and drawing properties, and had a rough and hard texture.

Example 2 Melt spinning was carried out under the same conditions as in Example 1 to obtain an undrawn yarn of 70 denyl 6 filaments. The undrawn yarn was stretched at a magnification of 3.5 times while heating for 7JO with a heating device at 90°C.
A filament yarn of denier 6 filament was produced. The fiber morphology, the thickness of the sheath component, the endothermic heat amount and softening point of the low softening point polymer of the obtained fibers were the same as in Example 1.

The obtained filament yarn was combined with polyester ficimen 1 hair yarn of 100 denier 72 filaments and subjected to mixing treatment in a turbulent flow bulking treatment device to obtain a mixed yi yarn. Next, the mixed fiber yarn was woven and subjected to a napping treatment to obtain a yukata fabric. The yukata fabric was ironed at a temperature of 120°C, and the crispness and feel of the fabric was evaluated and was found to be good. The results are shown in Table 1.

(Left below) Comparative Examples 9 to 11 Composite I! The isophthalic acid copolymerization rate (mol%) of the miscellaneous low softening point polyester was 27 mol% (Comparative Example 9), 52
mol% (Comparative Example 10) and endotherm 1 to 3 cal/q (
Comparative Example 11) Thread spinning, weaving, and evaluation were carried out in the same manner as in Example 1, except that Comparative Example 11) was used. The results are shown in Table 2.

Comparative Examples 12 to 14 The ratio of the composite VJI & miscellaneous high softening point polyester was 47% by weight (Comparative Example 12), the intrinsic viscosity of the low softening point polyester was 0.62 (Comparative Example 13), the intrinsic viscosity of the high softening point polyester Thread spinning, weaving, and evaluation were carried out in the same manner as in Example 1 except that 0.53 (Comparative Example 14).

The results are shown in Table 2.

(Margins below) "Effects of the Invention" The yukata fabric of the present invention uses threads mixed with a small amount of composite fibers containing low-melting point polyester as a sheath component, so that it can be starched simply by ironing without being starched during washing. It can produce a crisp finish similar to that of the original, and is particularly effective for use in general households, as well as as a linen supply for inns and hotels.

Claims (3)

[Claims] (1) The core component is a polymer made of a high softening point polyester with a softening point of 240°C or higher, the sheath component is a polymer made of a low softening point polyester with a softening point of 70 to 180°C, and at least the cross-sectional circumference of the core component A yukata fabric made of yarn containing 60% by weight and 3 to 20% by weight of composite fibers made by adhering the sheath component to a thickness of 0.5 to 5 microns. (2) The yukata fabric according to claim (1), wherein the low softening point polyester of the composite fiber is a polyester copolymerized with 30 to 50 mol% of isophthalic acid, and has an endothermic heat amount of 2 cal/g or less. (3) The proportion of the high softening point polyester forming the core component of the composite fiber in the cross section of the fiber is 50% by weight or more,
The yukata fabric according to claim 1, wherein the low softening point polyester of the fiber has an intrinsic viscosity of 0.60 or less, and the high softening point polyester of the fiber has an intrinsic viscosity of 0.55 or more.