JPH06101169A - Production of textile structure with refreshing cool feeling - Google Patents

Abstract

PURPOSE:To obtain a textile structure with excellent refreshing cool feeling even if worn in midsummer without causing troubles such as guide wearing. CONSTITUTION:Firstly, a fabric is made using such conjugate fibers that a fiber-forming polymer component containing an alkali metal titanate or alkaline earth metal titanate is covered with a polyester component. Then, this fabric is treated with an alkali to dissolve and eliminate the polyester component, thus obtaining the objective fabric excellent in refreshing cool feeling performance so as to block sunlight and suppress the temperature rise in clothing, without causing troubles such as guide wearing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber structure which blocks sunlight even when worn in midsummer and has an excellent cool feeling.

[0002]

2. Description of the Related Art Hitherto, various methods for producing a fiber cloth having a cool feeling have been proposed. For example, a method of using a high water absorption fiber such as rayon or cotton on the skin side to release sweat generated from the human body to the outside of clothes, a method of using a strong twist yarn on the skin side to reduce the contact area with the human body, or There is a method in which a fiber having a high thermal conductivity is used on the skin side or a resin containing a substance having a high thermal conductivity is printed on the back surface of the fiber cloth to remove body heat and release the heat to the outside of the body. However, the feeling of heat in midsummer is largely due to the temperature raising effect of clothing and the human body absorbing sunlight to raise the temperature, and the above method cannot provide excellent coolness.

In order to solve the above problems, conventionally, a method of vapor-depositing aluminum on the surface of a fiber cloth to reflect sunlight, or a method of kneading titanium oxide into fibers to reflect visible light in sunlight Etc. have been proposed. However, in the former method, since the fiber surface is uneven, there is a problem that even when aluminum is vapor-deposited, sunlight is diffusely reflected and the temperature of clothes and the temperature inside clothes increase. Further, in the latter method, since the masking power of titanium oxide is strong, the transmittance of the fiber cloth for sunlight is reduced and the rise in the temperature inside the clothes is suppressed, but titanium oxide itself absorbs sunlight. Since this is converted into heat energy, there is a problem that the temperature of clothes rises.

In order to improve these drawbacks, the present inventors have proposed in Japanese Patent Application No. 3-240412 at least one of alkali metal titanate and alkaline earth titanate.
We have proposed a cool-feeling fiber containing various types of ceramic fine particles, and a cool-feeling fabric composed of the fibers. However, in the above invention, when the ceramic fine particle-containing component is exposed, there is a problem that the yarn guide, the roller, the reed, the knitting needle, etc. are damaged by the contact with the ceramic fine particles during the production of the fiber or the woven or knitted fabric. It was Further, there is a problem that the effect of coolness is reduced when the ceramic fine particle-containing component is not exposed as compared with the case where it is exposed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is excellent in cool feeling without causing problems such as guide wear at the time of fiber production or woven or knit production. The purpose is to obtain a fiber structure.

[0006]

SUMMARY OF THE INVENTION The present invention achieves the above object and has the following configuration.

That is, the present invention provides "at least one of alkali metal titanate or alkaline earth titanate.
A component composed of a fiber-forming polymer containing ceramic fine particles of a seed is coated with a component B composed of polyester to form a fiber structure, which is then treated with an aqueous solution of an alkaline compound. A method for producing a cool-feeling fiber structure characterized by dissolving and removing the B component ".

The present invention will be described in detail below. The fiber structure in the present invention means a fiber cloth such as a woven fabric, a knitted fabric, a non-woven fabric or a textile product such as a sewn product.

The alkali metal titanate or alkaline earth metal titanate used in the present invention is a fibrous or plate-like material obtained by firing titanium oxide and an alkali metal carbonate or an alkaline earth metal carbonate at around 1000 ° C. In the form of a composite ceramic, alkali metal titanates include Li ₂ Ti ₆ O ₁₃ , Na ₂ Ti ₄ O ₉ , Na ₂ Ti ₆ O ₁₃ ,
K ₂ Ti ₂ O ₅ , K ₂ Ti ₈ O ₁₇ , Rb ₂ Ti ₆ O ₁₃ , Cs ₂ Ti ₄ O
₉ , Fr ₂ Ti ₆ O _{13 and the} like, and examples of the alkaline earth metal titanate include CaTiO ₃ , SrTiO ₃ and BaTiO ₃ .
_3, BeTiO _3, MgTiO _3, and the like. In the present invention, these ceramics are used alone or in combination of two or more.

The particle size of the fibrous or plate-like ceramic fine particles used in the present invention is preferably 50 μm or less in the lengthwise direction, more preferably 20 μm or less, and preferably 5 μm or less in the thickness direction, more preferably 1 μm or less.
Generally, when spherical or amorphous fine particles are included in the fiber, the particle size is preferably 10 μm or less, more preferably 1 μm or less. Since it is easy to arrange in the direction, the particle size may be comparatively large compared to spherical or amorphous particles, but if the particle size of the ceramic particles exceeds the above range, clogging or thread breakage in the filter material in the yarn making process will occur. However, even if the spinning can be performed, the problem of yarn breakage in the drawing process occurs, which is not preferable.

Examples of the fiber-forming polymer used in the present invention include thermoplastic polymers such as polyolefin, polyamide, polyester and polyacrylonitrile.

As the polyester used as the component B in the present invention, polyethylene terephthalate, polybutylene terephthalate, poly-1,4-cyclohexylene dimethylene terephthalate, polyethylene-2,6-naphthalate, etc., and polyester copolymers mainly containing these Examples thereof include polymers obtained by copolymerizing a metal salt of sulfoisophthalic acid, sebacic acid and the like.

The content of the above-mentioned ceramic fine particles is appropriately 0.1% by weight or more and 20% by weight or less, preferably 1% by weight or more and 10% by weight or less with respect to the fiber weight. If the content of ceramic fine particles is less than 0.1% by weight, the desired coolness is not obtained, and if it exceeds 20% by weight, the coolness effect reaches saturation and the production of fiber is not achieved. And the strength and elongation of the yarn are not sufficient.

The method of incorporating the ceramic fine particles into the fibers includes a method of directly mixing with the raw material polymer and spinning, and a method of producing a masterbatch containing a high concentration of a part of the raw material polymer in advance, which is produced at the time of spinning. There is a method of spinning after adjusting to a predetermined concentration.

Here, an example of a state in which the A component is covered with the B component will be described with reference to cross-sectional views of fibers. (1) to (4) of FIG. 1 each show a fiber cross section used for the cool-feeling fiber structure of the present invention before alkali treatment, and the A components 1, 3, 5, 7 containing ceramic fine particles are They are coated with B components 2, 4, 6, and 8 made of polyester, respectively. These composite fibers can be produced by a known melt composite spinning method, and can be crimped in the same manner as ordinary fibers.
Alternatively, it is used by mixing it with ordinary fibers depending on the purpose, and processed into a fiber structure such as a woven fabric, a knitted fabric or a non-woven fabric.

The cool-feeling fiber structure of the present invention is manufactured by treating the above-mentioned fiber structure with an aqueous solution of an alkali compound to dissolve and remove the component B. Examples of the alkaline compound used here include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, and sodium methylate, with sodium hydroxide being particularly preferred. The amount of the alkaline compound used varies depending on the type of the alkaline compound, the type of polyester, and the treatment conditions, but is usually preferably in the range of 0.01 to 40 g / liter.
As for the processing conditions, it is preferable that the normal temperature is in the range of normal temperature to 100 ° C. and the time is in the range of 1 minute to 4 hours.

The present invention is constituted as described above, and according to the present invention, a cool-feeling fiber structure having an excellent cool feeling without causing problems such as guide wear at the time of fiber manufacturing or woven or knitted material manufacturing. You can get things.

[0018]

[Operation] As in the method of the present invention, the component A made of a fiber-forming polymer containing at least one ceramic fine particle selected from alkali metal titanate and alkaline earth titanate is coated on the component B made of polyester. When a fiber structure is formed using the composite fiber
Since the yarn guides, rollers, reeds, knitting needles, etc. do not come into contact with the ceramic fine particles contained in the component A during the production of fibers or the production of woven or knitted fabrics, they are not damaged. After that, when the component B that has been coated is dissolved and removed by the aqueous solution treatment with an alkaline compound and the component containing the ceramic fine particles is exposed, visible light and near-infrared rays in sunlight are efficiently reflected compared to the case where it is not exposed. As a result, a high degree of coolness is exhibited.

The cool-feeling fiber structure of the present invention contains fine ceramic particles of an alkali metal titanate or an alkaline earth metal titanate in the inside of the fiber. The ceramic has a strong hiding power and sunlight. It has the property of reflecting visible rays and near infrared rays. Titanium oxide, zinc sulfide, etc. have been conventionally used as substances having the above-mentioned properties, but titanium oxide and zinc sulfide are amorphous particles, and if these are contained inside the fiber, visible light in sunlight and As a result of diffuse reflection of near-infrared rays and temperature rise of the fiber itself, excellent coolness is not obtained, but the ceramic fine particles made of alkali metal titanate or alkaline earth titanate used in the present invention are fibrous or plate-like particles. And
When this is included in the fiber, the length direction of the ceramic fiber is aligned with the yarn direction of the fiber, so that the diffuse reflection of sunlight is small and the reflection performance of the ceramic itself is not impaired, resulting in a high cool feeling. You will be able to exercise your sexuality.

[0020]

EXAMPLES The present invention will be described in more detail with reference to examples below. The measurement and evaluation of the performance of the fiber cloth in the examples was carried out by the following methods.

(1) Clothes temperature In a constant temperature and humidity room with a temperature of 30 ° C. and a humidity of 60%, a 100 W white light source for photography having a central wavelength of 1 μm was used as an energy source, and the surface of the fiber cloth was irradiated with a white light source. The back surface temperature of the fiber fabric after irradiation for 30 minutes was measured with a thermoviewer (infrared sensor, manufactured by JEOL Ltd.).

(2) Temperature inside clothes A temperature measuring device as shown in the side sectional view of FIG. 2 is installed in a constant temperature and humidity room with a temperature of 30 ° C. and a humidity of 60%, and 100 W white for photography with a central wavelength of 1 μm as an energy source. Using the light source 9, the measured fiber cloth 1 located at a position 60 cm from the light source 9
When the surface of No. 0 was irradiated with white light for 10 minutes, the cloth 10
The temperature was measured by a temperature sensor 11 located 5 mm away from the back surface of the black polyester fabric 12 and in front of the black polyester fabric 12 to evaluate the light shielding property of the fiber fabric 10.

(3) Abrasion resistance As shown in FIG. 3, the V-shaped portion 15 of the brass wire 14 having a diameter of 3 mm has a thread tension of 0.50 g / d and a running speed of 150 m / mi.
After the yarn 16 before forming the fiber structure was run for 10 minutes at n, the depth of wear of the brass wire was measured with a microscope and judged according to the following three criteria. ○: Good at a wear depth of 200 µm or less △: Slightly bad at a wear depth of 200 to 300 µm ×: Bad at a wear depth of 300 µm or more

Example 1 92 parts by weight of polyethylene terephthalate having a relative viscosity of 1.38 measured at a concentration of 0.5 g / deciliter and a temperature of 25 ° C. in an equal weight mixed solvent of phenol and tetrachloroethane, and maximum particles in the longitudinal direction. 5 parts by weight of K ₂ Ti ₄ O ₉ fine particles having a diameter of 25 μm and a maximum particle diameter in the thickness direction of 0.5 μm, and MgTiO ₃ having a maximum particle diameter in the length direction of 10 μm and a maximum particle diameter of 0.2 μm in the thickness direction. A mixture of 3 parts by weight of fine particles was used as a core component, and the same polyethylene terephthalate without addition of K ₂ Ti ₄ O ₉ fine particles and MgTiO ₃ fine particles was used as a sheath component, and the core / sheath weight ratio was 90/10.
Was melt-spun. At this time, the spinning temperature was set to 260 ° C., and the spinning speed was 3000 m / min.
Subsequently, the multifilament yarn 75d / 24f of the present invention was obtained by drawing and heat treatment at a drawing temperature of 120 ° C., a draw ratio of 1.5 times, and a heat treatment temperature of 160 ° C.

Using the obtained filament yarn as warp and weft, a plain weave having a warp density of 120 / inch and a weft density of 90 / inch was woven. 20g / after scouring this raw machine by the usual method
Alkali treatment with liter sodium hydroxide solution, 1
0% by weight of component B was dissolved and removed. Then, after presetting with a heat setter at 160 ° C for 30 seconds, Ka
yalon Polyester Blue 2R-SB (Nippon Kayaku Co., Ltd.,
Disperse dye) 2% owf was dyed in blue to obtain a cool-feeling fiber cloth of the present invention.

For comparison with the present invention, a comparative fabric (referred to as Comparative Example 1) was obtained in the same manner as in this example except that the alkali treatment was omitted in this example. Also,
In this embodiment, K ₂ Ti ₄ O ₉ fine particles and MgTiO _{3 are used.}
A comparative fabric (referred to as Comparative Example 2) was obtained in the same manner as in this example except that titanium oxide fine particles having a maximum particle size of 1.2 μm were used instead of the fine particles.
Fabrics for comparison (comparative) were prepared in the same manner as in this example except that polyethylene terephthalate containing ₂ Ti ₄ O ₉ fine particles and MgTiO ₃ fine particles was used as a sheath component and polyethylene terephthalate was used as a core component, and alkali treatment was omitted. Example 3) was obtained. Further, for comparison with the present invention, a fabric for comparison (comparative example) was prepared by the same method as in the present example except that polyethylene terephthalate used as the sheath component in this example was used as both the core component and the sheath component. 4).

The performances of the present invention and the comparative fabrics obtained as described above were measured, and the results are also shown in Table 1.

[Table 1]

As is clear from Table 1, according to the method of the present invention, a fiber structure having excellent cool feeling can be obtained without causing guide wear.

[0029]

EFFECTS OF THE INVENTION According to the method of the present invention, there is provided a fiber structure having a good coolness which suppresses the temperature rise of clothes and the temperature inside clothes under direct sunlight without causing guide wear during the production of woven or knitted fabrics. Obtainable.

[Brief description of drawings]

1 (1) to (4) are cross-sectional views of a composite fiber in which an A component containing ceramic fine particles used in the method of the present invention is coated with a B component made of polyester.

FIG. 2 is a side sectional view of an essential part of an apparatus for measuring the temperature inside clothes of a cool-feeling fiber structure according to the method of the present invention.

FIG. 3 is a sketch of a main part of an apparatus for evaluating wear resistance.

[Explanation of symbols]

1,3,5,7 A component containing ceramic fine particles A component 2,4,6,8 B component consisting of polyester 9 100 W white light source for photography 10 Fiber cloth of the present invention 11 Temperature sensor 12 Black dyed polyester fabric (both warp and weft) 75d / 36f, warp density 110 / inch, weft density 80
Book / inch) 13 20mm thick expanded polystyrene (insulation material) 14 Brass wire 15 V-shaped portion 16 Thread

Claims (1)

[Claims] 1. A composite fiber comprising a component B comprising a polyester and an A component comprising a fiber-forming polymer containing at least one kind of ceramic fine particles selected from alkali metal titanates or alkaline earth titanates. A method for producing a cool-feeling fiber structure, comprising forming a fiber structure using the above, and then treating with an aqueous solution of an alkali compound to dissolve and remove the component B.