JP2001192927A - Tourmaline-kneaded fiber having antibacterial function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that the electrode potency of a synthetic fiber kneaded with only ultrafinely crushed tourmaline is insufficient. SOLUTION: This antibacterial function synthetic fiber kneaded with ultrafinely ground tourmaline is characterized by kneading with titanium dioxide and silicon dioxide, preferably, in the ratio of 2.0 to 5.0 wt.% of tourmaline, 0.2 to 0.4 of titanium dioxide and 0.3 to 0.6 wt.% of silicon dioxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber provided with antibacterial function by kneading tourmaline.

[0002]

2. Description of the Related Art It is known that tourmaline generates an anode and a cathode spontaneously by pulverization, and emits electrons from the cathode semi-permanently. Taking advantage of this characteristic, ultra-fine pulverization in sub-micron (0.1 micron) units and kneading of tourmaline into fibers have led to the development of fibers having various functions. For example, it is disclosed in Japanese Patent No. 2715034 and the like and is proposed in Japanese Patent Application Laid-Open No. 6-228808.

[0003]

However, water is electrolyzed by electrons emitted from tourmaline crystals, and hydrogen ions are released as hydrogen gas outside the system. Then, only the recycled fiber rayon having a two-digit difference in electric resistance value emits the desired electrons,
When kneaded into other synthetic fibers, less electron emission was observed. The electrode titer is a term set to determine the relative size of the weak permanent electrode of tourmaline. For example, in the above-mentioned Japanese Patent No. 2715034, the change in the electrical characteristics of the test sample, the specific PH
And the decrease in electrical conductivity are shown and compared. If the electrical characteristics such as the rate of increase in pH and the rate of decrease in electrical conductivity are high, the electrode potency is high and the electrode of tourmaline is large.

[0004] In view of the above problems, the present inventors have made intensive studies to knead tourmaline into a wider range of fibers.
The difference in the electric resistance value of tourmaline alone is small, and it is clarified that the cause of the extremely low electrode titer is that electrons are absorbed in the fiber of the synthetic fiber and no electrons are emitted to the outside of the fiber. The present inventors have found a method of reducing the electric resistance of synthetic fibers to be kneaded, and have completed the present invention.

[0005]

According to the present invention, there is provided an electric power generating apparatus, wherein an antibacterial property is imparted by blending titanium dioxide and silicon dioxide in a fiber obtained by pulverizing tourmaline and kneading the synthetic fiber. It is an antibacterial functional fiber incorporated in stone.

Particularly preferably, tourmaline is 2.0 to 5.0% by weight and titanium dioxide is 0.2 to 0.2% by weight based on the synthetic fiber.
The antibacterial functional fiber is kneaded with tourmaline in which 0.4% by weight and silicon dioxide are kneaded in a ratio of 0.3 to 0.6% by weight.

[0007] As described above, the present invention provides a tourmaline by mixing titanium dioxide and silicon dioxide in an appropriate ratio.
In order to solve the above-mentioned problems, a technique for kneading into synthetic fibers such as polyurethane, polyester, nylon and acrylic has been established. That is, the present inventors have found that the electric stone alone has a small difference in electric resistance value with respect to the synthetic fiber, the generated electric charge is absorbed by the synthetic fiber material, and the electric charge discharged to the outside of the synthetic fiber is small. It was clarified that this was the cause of the extremely low ratio, and by mixing titanium dioxide and silicon dioxide with tourmaline, a synthetic fiber with an extremely high electrode titer was completed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited thereto. The antibacterial functional fiber mixed with tourmaline of the present invention has a configuration in which tourmaline, titanium dioxide, and silicon dioxide are blended with synthetic fiber. The mixing ratio of tourmaline, titanium dioxide and silicon dioxide is not particularly limited as long as the desired properties can be obtained.
To 5.0% by weight, titanium dioxide 0.2 to 0.4% by weight,
A range of 0.3 to 0.6% by weight of silicon dioxide is preferred.

In the present invention, the synthetic fibers include:
Polyurethane, polyester, nylon, acrylic and the like are exemplified, and a blend of these may be used. Particularly, polyurethane has a wide range of application because it has elasticity. Further, another fiber may be covered on the synthetic fiber in which tourmaline, titanium dioxide and silicon dioxide are kneaded.

In order to knead into a fine fiber having a diameter of 10 to 30 microns, it is necessary that crystals having a size of 1 micron or less, desirably 0.5 microns on average, exceeding 1.5 microns are not present. As a technique for ultra-fine grinding of tourmaline to such a small particle size, for example, a tourmaline using alumina or zircon pole is charged with a tourmaline powder pre-ground to 3 microns as an aqueous dispersion solution to prevent alteration. Use sodium hydroxide for pH adjustment, 24
A technique of pulverizing by continuous operation for a long time can be applied, whereby an ultrafine powder dispersion having an average of about 0.7 μm can be obtained.

The kneading into the synthetic fiber is carried out by mixing the ultrafine powder dispersion obtained by the above-mentioned ultrafine pulverization with the melt of the synthetic fiber to be spun in an amount calculated so as to have a desired content, For example, it can be carried out by uniformly mixing the mixture with a stock solution of polyurethane and spinning by a usual method. The synthetic fiber can be applied to fibers having a wide range of thickness from about 2 to 6 denier to about 420 denier for warp knitting.

The functionality of the functional fiber of the present invention is, for example,
Evaluation is based on determination by electrode titer, measurement of far-infrared radiation in body temperature range, and measurement of antibacterial activity.

The functional fiber of the present invention is suitable for clothes such as white coats, sheets, covers, curtains, etc. for preventing hospital-acquired infections due to its excellent antibacterial properties.
Also, besides medical institutions, for example, socks, underwear, swimwear, spats, short spats, fitness leotards,
Even when applied to a wide variety of textile products such as Unitard, raglan top, blouson, stretch boots, ballet shorts, and swim shorts, the antibacterial properties of functional fibers improve hygiene and reduce odor. It is possible to get.

[0014]

EXAMPLES Next, the present invention will be specifically described with reference to examples and comparative examples, but the present invention is not limited to these examples. (Example 1) Tourmaline (average particle size 0.5 micron) 2.5
Wt%, titanium dioxide (average particle size 0.01 micron)
0.2 wt%, silicon dioxide (average particle size 0.01 micron), blended into the melt for nylon fibers at a blending ratio of 0.3 wt%, and spun into 20 denier fiber according to the usual spinning process, Furthermore, 70 denier nylon was covered. Using the obtained functional fiber 20/70 as the backing yarn, shorts were manufactured using ready-made nylon 70 / 1-24F x cotton 80/1 as the surface yarn, and the product, and a standard cotton cloth for comparison, An antibacterial test was performed. [Test strain] Staphylococcus aureus-Staphylocollus aureus ATCC 6538P Klebsiella pneumoniae ATCC 4352 MRSA-Staphylococcus aureus IID 1677 Escherichia coli-Escherichia coli IFO 3301 Pseudomonas aeruginosa-Pseudomonas aeruginosa IFO 3080 [Manual method] New Function Evaluation Council). [Washing method] According to the test method of JIS L 0217 103.
(The detergent used is JAFET standard detergent.) The test results are summarized in Table 1. In addition, the charging properties of the above products were measured based on the frictional voltage measurement method (20 ° C. × 40%) specified in JIS-L-1094. Table 2 shows the results.

[0015]

[Table 1]

[0016]

[Table 2]

Furthermore, the evaluation of antibacterial activity was carried out by checking the antibacterial activity of the textile product against the Klebsiella pneumoniae (Lebsiella pneumoniae ATCC 4352) by the shake flask method specified in the Manual for Evaluation of Processing Effect on Sanitary Processed Products of the Textile Product Evaluation Committee. The results are shown in Table 3.

[0018]

[Table 3]

Example 2 The same tourmaline 2.5 as in Example 1
Wt%, titanium dioxide 0.2 wt%, silicon dioxide 0.3
The weight percent was kneaded into the melt for polyurethane fibers, spun into 20 denier fibers according to the usual spinning process, and covered with 70 denier nylon. The obtained functional fiber 20/70 was used as the backing yarn, and the ready-made cotton FC-51 was used.
Manufacturing crew socks using 0 32/2 as the surface yarn,
Using this product as a sample, the antibacterial property was evaluated in the same manner as in Example 1. The results are also shown in Table 3.

Example 3, Comparative Examples 1 and 2 Crew socks were produced in the same manner as in Example 2, and an electrode titer test was performed using this product as a sample. 2. As Comparative Example 1, tourmaline was used alone without using titanium dioxide and silicon dioxide.
A sock was produced in the same manner as in Example 2 except that 0% by weight was kneaded, and the electrode titer of this product was evaluated.
As Comparative Example 2, a sock was produced in the same manner as in Example 2 except that none of titanium dioxide, silicon dioxide and tourmaline was used, and the electrode titer of this product was evaluated.

Next, a method of measuring the electrode titer will be described.
As shown in FIG. 1, 900 ml of distilled water or purified water was placed in a beaker 1 having a capacity of 1000 ml, and pH was adjusted with dilute hydrochloric acid.
After adjustment to 3.0, a stainless steel wire mesh basket 16 was placed in the beaker 1, and a 20 g test sample (socks) 3 was wound around the periphery thereof. 15 with special stirring blade 2
While stirring at 0 rpm, the pH and the electric conductivity EC were changed by a pH meter 4 and an electric conductivity meter 5 from 0 minutes to 30 minutes.
Measurements were recorded over minutes. In the figure, 6 is a driving device, 7 is a driving power supply device, and the measured temperature is 25.
° C.

FIG. 2 is a graph showing changes in the pH and the electric conductivity EC of the crew socks of Example 3 and Comparative Examples 1 and 2.
Also, the change (increase) in pH and the change (decrease) in electrical conductivity
Were compared as ΔpH and ΔEC, respectively. Further, in order to check the fluctuation of the electric conductivity, the difference of the log of the electric conductivity was determined from the stable movement from 10 minutes to 30 minutes after the start of the measurement, and the determination was made by multiplying by 5 (hereinafter, referred to as the following). , Log value). Here, the time from 0 to 10 minutes is not included in the calculation because the dye and the like from the fibers are eluted. Table 4 shows the above results.

[0023]

[Table 4]

Example 4 and Comparative Example 3 As Example 4,
An eight-part sleeve sleemer was manufactured using the same functional fiber 20/70 as in Example 2 as a backing yarn and using a ready-made nylon 40/2 × cotton 80/1 as a front yarn. Room temperature 22 to 23.5 for a 54-year-old healthy woman
After the upper body was undressed and the body surface temperature became constant after sitting at a constant temperature for 30 minutes or more at 55 ° C. and a humidity of 55 ± 3%, a thermograph of the back was recorded with this time as before clothing. Thereafter, the patient was put on the sleeper, left sitting for 30 minutes, and then undressed. Immediately after undressing (0 minutes), thermographs of the back were recorded at 5 minute intervals. For the thermograph, Neo Thermo (product name) TVS-600 of Avionics Japan was used, and the color video printer UP-2300 of Sony Corporation and the notebook computer Satelli of Toshiba Corporation were recorded.
te (product name) 2520, a Canon BJC-400J color printer was used. FIGS. 3 to 6 show thermograph images and histograms of temperature distribution up to 25 minutes after undressing, and Table 5 shows measured values such as the maximum temperature in the screen. For comparison, a sleemer produced in the same manner as in Example 4 except that no titanium dioxide, silicon dioxide, and tourmaline were used was measured in the same manner (Comparative Example 3). Figure 7 shows the thermograph up to 20 minutes after undressing.
To FIG. 9 and Table 5 also show the measured values.

[0025]

[Table 5]

[0026]

According to the present invention, antibacterial properties are imparted to the synthetic fiber by mixing titanium dioxide and silicon dioxide in the fiber obtained by ultrafinely pulverizing tourmaline and kneading the synthetic fiber. It is extremely useful as a raw material for textile products used in contact with the surface.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a method for measuring an electrode titer.

FIG. 2 is a graph showing the results of measuring the electrode titers of Example 3 and Comparative Examples 1 and 2 of the present invention.

FIG. 3 is a thermograph image and a histogram of temperature distribution (0 minute after undressing) when a wearer of underwear using the fiber of the present invention is viewed from the back.

FIG. 4 is a thermograph image and a histogram of a temperature distribution (10 minutes after undressing) when a wearer of underwear using the fiber of the present invention is viewed from the back.

FIG. 5 is a thermograph image and a histogram of temperature distribution (20 minutes after undressing) when a wearer of underwear using the fiber of the present invention is viewed from the back.

FIG. 6 is a thermograph image and a histogram of temperature distribution (25 minutes after undressing) when a wearer of the underwear using the fiber of the present invention is viewed from the back.

FIG. 7 is a thermograph image and a histogram of temperature distribution (0 minutes after undressing) when a wearer of underwear using a conventional fiber is viewed from the back.

FIG. 8 is a thermograph image and a histogram of a temperature distribution (10 minutes after undressing) when a wearer of underwear using conventional fibers is viewed from the back.

FIG. 9 is a thermograph image and a histogram of temperature distribution (20 minutes after undressing) when a wearer of underwear using conventional fibers is viewed from the back.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beaker 2 Stirring blade 3 Test sample (sock) 4 pH meter 5 Electric conductivity meter 6 Driving device 7 Power supply device for driving 16 Basket

Claims (2)

[Claims] An antibacterial functional fiber incorporating an electric stone, wherein titanium dioxide and silicon dioxide are blended to impart antibacterial properties to a fiber obtained by ultrafinely pulverizing tourmaline into a synthetic fiber. 2. The tourmaline is 2.0 to 2.0 parts of the synthetic fiber.
5.0% by weight, 0.2 to 0.4% by weight of titanium dioxide,
The antibacterial functional fiber according to claim 1, wherein silicon dioxide is kneaded in a ratio in a range of 0.3 to 0.6% by weight.