JP3018388U - Functional textile products with spontaneous / induction electrodes - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a functional fiber product having spontaneous / inductive electrodes, which is formed into an electret by induction from an external electric field such as tourmaline, a natural spontaneous / permanent electrode, and barium titanate. By combining and complementing each other, it is intended to further enhance the antistatic effect. [Structure] An artificial fiber 1 that constitutes a functional fiber product having a spontaneous / induction electrode is configured to include a large number of tourmaline crystal fine powder 2 and ferroelectric powder 3. By combining the above two powders, it can be widely applied to both recycled fibers and synthetic fibers, and its practicality is enhanced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a functional fiber product having a spontaneous / induction electrode, and in particular, a powder of a strong derivative that retains a residual charge for a long time after removing a permanent electrode material called tourmaline and an external electric field called an electret. The present invention relates to a functional fiber product having a spontaneous / induction electrode in which synthetic resin such as recycled fiber or synthetic fiber is mixed.

[0002]

[Prior art]

 As a conventional functional fiber product having a spontaneous / induction electrode, for example, an attempt has been made to impart electrical characteristics such as conductivity to the fiber. The following two methods have been put into practical use as means for producing this conductive fiber.

1. A method of crushing tourmaline to less than 1 micron and kneading it into rayon. As typical examples of this method, there are JP-A-2-169764, JP-A-4-327207, and JP-A-6-184808. 2. An electretized fiber in which a substance having a dielectric property is applied or kneaded into a fiber to form a fiber, and then the electrode is artificially generated by placing it in a strong electric field is described in Japanese Patent Publication No. 6-104952. Also, regarding a technique of kneading a substance having a dielectric property into a fiber to reduce the electric resistance value of the fiber to facilitate the passage of electricity and release the static electricity, Japanese Patent Publication No. 126310/1985 and Japanese Patent Publication No. 85112/1988 are disclosed. It is described in the report.

[0004]

[Problems to be solved by the device]

 However, in the method of kneading tourmaline powder among such conventional conductive fibers, the tourmaline is crushed to 1 micron or less and dispersed in the regenerated fiber rayon at a level of 5 to 15%. It has been blended and spun and used as tourmaline rayon.However, due to differences in the types of tourmaline gemstones, the place of origin, and the production process of rayon, there are large differences in the electrical characteristics, and their reliability as industrial products is high. Was lacking in.

[0005] Although it is said to be the rest of natural gemstone collection, the price of tourmaline gemstone is high and the hardness as a gemstone is 7.5. Therefore, it is not easy to grind, and especially, it is difficult to crush it into fibers. In order to knead it, it had to be crushed to an average of 1 micron or less, and if desired, to an average of 0.5 micron, and the crushing cost was high. Therefore, if it is kneaded at a level of 10%, the cost will be several times that of ordinary fiber, and it will be difficult to stimulate widespread demand. Therefore, tourmaline is effective only for mixing with recycled fiber rayon, which is originally hygroscopic and has low electric resistance, in an amount of 3 to 6%, and is practically effective for synthetic fibers having hydrophobicity and high electric resistance. There was a problem that I could not expect.

On the other hand, the artificial electret utilizing the residual electric charge is extremely weak against heat, and the amount of electric charge is significantly attenuated by the temperature rise, and most of the electric charge is lost at about 70 ° C. to 80 ° C. . Therefore, like rayon fiber, it is not possible to electretize the fiber itself that is heated during the spinning process, and at the same time, treat the electretized fiber product with heat treatment such as cleaning or ironing. There was a problem that I could not do it.

The present invention has been made in view of such conventional problems, and is effective only for tourmaline, which has the effect of kneading only in recycled fiber rayon, and synthetic fiber such as nylon, polyester, and acrylic. It is an object of the present invention to provide functional fiber products such as electrically conductive fibers made of recycled fibers and synthetic fibers or a mixture of both by combining both of the above-mentioned electretization by dielectrics.

[0008]

[Means for Solving the Problems]

 According to a first aspect of the present invention, the functional fiber product having the spontaneous / induction electrode comprises artificial fibers containing a large number of finely divided tourmaline crystals and ferroelectrics as all or part of the constituent fibers. The invention according to claim 2 is characterized in that, in addition to the above-mentioned constitution, the form of the functional fiber product having the spontaneous / induction electrode is a woven fabric, a knitted fabric or a non-woven fabric. is there.

Tourmaline (the chemical formula of tourmaline NaX ₃ Al ₆ B ₃ Si ₆ O ₂₇ (O, OH) ₃ (OH, F)) is Fe ²⁺ , Mn ²⁺ , Li contained in the place of production or color, that is, X. ^2+, the metal ions of Cr ²⁺ and the like, the difference comes into the amount of electrons emitted from the spontaneous electrode upon powdered. Iron tourmaline is black and has a high electrolysis capacity for water (called electrode titer) by the tourmaline carrier, but it is difficult to apply it to underwear that requires whiteness because the kneaded fibers change to a black color tone. . It is preferable to use the cut residue of the gem tourmaline, which is transparent and has a clear crystal shape. The tourmaline is crushed to about 200 mesh, crushed to about 3 microns, and ultrafinely crushed with a tron mill set with gircon balls, and then 0.3 to 0. The powder or suspension is normally distributed in 6 microns.

Ferroelectric powders include Rochelle salt, potassium dihydrogen phosphate, guanidine aluminum sulfate hexahydrate, puricin sulfate, barium titanate, sodium niobate, lithium niobate, lithium tantalate, and sulfuric acid. Examples include sodium.

As the synthetic fibers, polyamides such as nylon 6, nylon 66 and nylon 12, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyolefins such as polypropylene, acrylic polymers, polyurethanes and modified fibers thereof are preferable. Can be listed as

The method of applying to the fiber may be either a coating method on the fiber surface or a mixing method, but from the economical point of view, the mixing method at the time of spinning is superior, and in this case, the effect of antistatic property and From the viewpoint that the physical properties of the fiber are not impaired as much as possible, it is desirable to form the fiber by, for example, mixed spinning or composite spinning so that the conductor particles are unevenly distributed on the surface of the fiber as much as possible.

[0013]

[Action]

 In the present invention, if both tourmaline with natural spontaneous / permanent electrodes and electret minerals such as barium titanate, which are dielectrically generated under an external electric field and generate electrodes, are added together, their disadvantages are complemented. Further advantages are combined to bring out a further effect, and thus it is possible to obtain a dielectric fiber which can always generate a sufficient weak current.

As described above, the natural tourmaline electrode alone has no effect even if it is kneaded into a synthetic fiber having a high electric resistance value, but by mixing a dielectric compound to lower the electric resistance value, it is possible to use nylon or polyester. Even if it is kneaded into synthetic fibers such as acrylic, it works more effectively than kneading rayon.

Further, by measuring the electrode titer of the kneaded fiber and adjusting the voltage according to the degree to promote electretization, the intended electrode titer can always be obtained, so that it is constant as a product. Will be able to supply the market with products that guarantee the effects of.

[0016]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially enlarged cross-sectional view showing an embodiment of fibers constituting a functional fiber product having a spontaneous / induction electrode according to the present invention.

The fiber product according to the present invention is an artificial fiber containing a large number of finely divided tourmaline crystals and ferroelectrics, such as the fiber 1, yarn, woven fabric, knitted fabric or non-woven fabric shown in FIG. Composed of some materials. In FIG. 1, 2 is a conceptually illustrated tourmaline crystal, and 3 is a ferroelectric fine powder.

The artificial fibers including the tourmaline crystals and ferroelectrics are rayon, acetate, polyamide synthetic fibers, acrylonitrile synthetic fibers, polyvinyl alcohol synthetic fibers, etc. It is not limited at all.

The tourmaline crystals and ferroelectrics, which have been pulverized to a size of several μm, are added to the raw material or the polymer in an appropriate step according to the type of the artificial fiber, the spinning method, etc., and diffused. For example, in the case of rayon to which wet spinning is applied, fine powder of tourmaline and ferroelectric powder are added to the spinning solution and diffused, and the rayon containing tourmaline crystals and ferroelectric is drawn from the spinneret in the spinning bath. Produce filaments or staples. In the case of acetate to which dry spinning is applied, when the polymer is dissolved in a volatile solvent, a tourmaline fine powder and a ferroelectric powder are added together with the polymer to diffuse it, and this is heated from a fine nozzle hole to a high temperature. By extruding it in an inert gas or air, and spreading the solvent and tourmaline fine powder and ferroelectric powder while spinning and drawing, acetate filaments containing tourmaline crystals and ferroelectrics are formed. Take it up. In the case of polyamide-based synthetic fibers to which melt spinning is applied, in the process of melting the polymer chips after completion of polymerization and supplying them to the spinning machine, tourmaline powder and ferroelectric powder are added, or the state of chips after completion of polymerization It is possible to add and diffuse tourmaline fine powder and ferroelectric powder in the process of supplying the polymer in a molten state to the spinning machine without passing through, thereby containing tourmaline crystal and ferroelectric. Polyamide synthetic fiber filaments or staples are produced. The addition amount of tourmaline fine powder and ferroelectric powder per unit volume can be arbitrarily determined according to the application of the textile product.

Next, by combining barium carbonate and titanium oxide as a ferroelectric substance, calcium carbonate, lead oxide, magnesium oxide, niobium oxide, zirconium oxide, etc. are added in an appropriate number of moles and pulverized to about 0.5 micron. The manufacturing process of the fiber containing both tourmaline powder and ferroelectric powder will be described by taking the produced barium titanate powder as an example.

Since recycled fiber rayon easily contains water, it shows an electric resistance value of 10 ⁶ Ω · cm to 10 ⁸ Ω · cm in a normal use condition, and synthetic fibers such as nylon and polyester have a resistance of 10 ¹⁰ Ω · cm. It exhibits a high electric resistance value of 10 to 10 ¹² Ω · cm. Therefore, it is necessary to change the mixing ratio by itself depending on the method of kneading into recycled fiber and the method of mixing into synthetic fiber.

In the case of rayon, first, 95 parts of tourmaline fine powder is uniformly mixed with 5 parts of the barium titanate powder, and the weight ratio of the fiber powder in the final product is 3 to 6%. After mixing in this way, it was extruded from the spinneret and neutralized to give fibers. This rayon fiber mixed with tourmaline and barium titanate is called TM rayon. Since this TM rayon has weak fibers, it is difficult to produce a fiber product, especially underwear, as a twisted yarn as it is. Therefore, first, the electrode strength of TM rayon is measured, and if it meets the shipping standard, the TM rayon is left as it is. Rayon: Cotton: Polyester = 3: 5: 2 and the like are compounded into a twisted yarn. As a result of the measurement, when the electrode strength of TM rayon is low, the twisted yarn is passed through an electric field of 20 to 60 kV of direct current in the step of producing the twisted yarn in the same process, and the barium titanate-based It induces dielectric and increases the electrode titer.

The following tests were conducted to compare the electrode titer of rayon containing tourmaline and barium titanate with that of conventional rayon alone. Rough tourmaline was crushed to 200 mesh by a known method, and this was run by a tron mill set with zircon balls in a wet condition for 24 hours continuously for 10 days to obtain a particle size distribution of 1 micron or less and 0.5 micron. A centered tourmaline fine powder suspension was obtained. Then, the above-mentioned barium titanate powder was added at a ratio of 5% with respect to tourmaline and operated for 2 hours in a cylindrical container of a tron mill. This tourmaline / barium titanate mixture was added to and mixed with the rayon melt so that tourmaline was 4% in terms of solid content, and then sprayed from the spinneret into the neutralizing solution to obtain tourmaline rayon fiber. It was

The electrode titer of this tourmaline / barium titanate-added rayon fiber (4% added as tourmaline) and the conventional tourmaline-added rayon fiber (5% added with the same tourmaline) was measured by a conventional method. For the conventional electrode titer measurement, 20 g of a test sample was taken, 900 ml of distilled water was placed in a beaker of 1000 ml, pH was adjusted to 3.0 with dilute hydrochloric acid, and the mixture was stirred at a constant speed with a special stirring blade. However, the amount of water electrolyzed in 30 minutes after the sample is charged is measured by increasing the pH and decreasing the electrical conductivity. The result is shown in FIG.

The obtained tourmaline / barium titanate-added rayon fiber and tourmaline-added fiber are mixed in a rayon: cotton: polyester ratio of 30:50:20 to form a twisted yarn. By passing a field of 50 kV for 1 to 2 seconds, artificial polarization was generated by the induction of barium titanate in addition to the natural permanent electrode. The results of measuring the electrode titer of this twisted yarn by the method described above are shown in FIG.

In the case of synthetic fiber, the electrical resistance value of the fiber is measured to determine the blending ratio of tourmaline powder and barium titanate powder. Since the electrical resistance of synthetic fibers such as nylon and polyester is about 10 ¹² Ω · cm, 90 parts of tourmaline powder and 10 parts of barium titanate were uniformly mixed and used.

For kneading into nylon, it is desirable to use a powder from which water has been removed, so a tourmaline ultrafinely ground tourmaline is used to remove water as much as possible with a special filter press, and this is vacuum dried to obtain titanium. After adding the calculated amount of barium acid powder, the mixture was again mixed with zircon balls and alumina balls in the tron mill, and this time, it was pulverized by the dry method. The tourmaline / barium titanate mixed powder thus obtained was classified by a gas stream classifier into particles of 1 micron or less, and most of them were classified into 0.5 to 0.6 micron. In order to disperse uniformly, it was first dispersed in a molten nylon stock solution so that the final nylon pellets were kneaded by 2 to 4%. The nylon pellets were placed in a DC electric field of 5 kilovolts for 8 to 24 hours to electretize the barium titanates and then spun by a usual method to obtain the desired fiber.

The following tests were conducted in order to compare the electrode titer of nylon containing tourmaline and barium titanate with the conventional one containing only tourmaline. A rough tourmaline stone having a high electrode titer was selected and ground to 0.3 to 0.6 micron by a tron mill using a zircon cone. Then, one-third the amount of alumina balls was added to the zircon balls so that the amount of barium titanate was 1 part with respect to 9 parts of tourmaline, and the tron mill was further operated for 24 hours. The wet pulverized product that has been pulverized and mixed is separated from the zircon balls and alumina balls by a filter, and then water is removed by a vacuum drying method.

Further, it was pulverized again by an air flow type pulverizer to adjust the particle size distribution to 1 micron or less. This tourmaline / barium titanate mixture fine powder was mixed at the final stage of the polymerization process of nylon 66 so as to have a solid content of 3% so as to obtain chips. Since the tourmaline / barium titanate-added nylon 66 chip is 3 to 4 mm granular, it was placed in a DC electric field of 50 kV for 8 hours while flowing with air to conduct an induction treatment.

The dielectrically treated chips were melt-spun to obtain long fibers, knitted into a pantyhose type, and then the electrode titer was measured. Nylon containing only 3% of tourmaline, nylon containing 3% of a mixture of tourmaline 9: titanium oxide, nylon containing 3% of a mixture of tourmaline 9: barium titanate 1 and the dielectrically treated nylon of the former Electrode The result of measuring the titer is shown in FIG.

[0031]

[Effect of device]

 According to the present invention, the characteristics of tourmaline with natural spontaneous / permanent electrodes are combined with the characteristics of electret minerals such as barium titanate that are dielectrically generated by an electrode under an external electric field. It is possible to complement and exert a synergistic effect of advantages, and it is possible to always generate a sufficient weak current in both regenerated rayon and synthetic fiber, which has been impossible in the past. As a result, it has become possible to manufacture dielectric fibers that exhibit the following excellent effects.

1. In the case of rayon, both TM rayon / cotton / polyester twisted yarn and TM rayon / wool / acrylic / nylon twisted yarn showed an electrode strength 2-3 times higher than that obtained when kneading with tourmaline powder alone. 2. Furthermore, when TM rayon and polyester were mixed to produce a non-woven fabric, a high electrode titer was exhibited because the electric resistance value was lowered without electric field treatment. 3. In the case of nylon, with 3% kneading, tourmaline alone, tourmaline / barium titanate mixed electric field treatment, tourmaline / barium titanate mixed electric field treatment, electrode titer fluctuates greatly, and tourmaline alone The electrode titer was close to zero, and in the case of mixing, the electrode titer was about TM rayon without electric field treatment, and when the electric field treatment was performed, it was 2 to 3 times that.

The functional fiber product having spontaneous / induction electrodes according to the present invention having the above-mentioned excellent antistatic effect is a kind of clothing that has a tender point electrical stimulation therapeutic effect and is of a type that directly touches the human body. Clothes and fabrics such as underwear, supporters, socks, gloves, headbands, pillow covers, sheets, duvet covers and other health textile products, dust / explosion proof clothing, linings for clothes, surgical clothing, hats and shoe covers. It is not only useful, but also for daily use such as masks, carpets, vacuum cleaner filters, wipers, liquid or gas filters, adsorbents, filter media, sensors, printing and printing screens, and other highly successful plants. Horticultural applications such as wound sheets for grafted parts, as well as medical electrets that have various medical agents such as Mercurochrome, acrinol, and ointment attached and laminated. It can be applied to a wide range of fields such as the field of medical products such as seats and can exhibit excellent effects.

[Brief description of drawings]

FIG. 1 is a partially enlarged cross-sectional view showing an embodiment of fibers constituting a functional fiber product having a spontaneous / induction electrode according to the present invention.

FIG. 2 is a characteristic diagram showing electrode titers of tourmaline / barium titanate-added rayon fiber and conventional tourmaline-added rayon fiber.

FIG. 3 is a characteristic diagram showing the electrode strength of the rayon fiber and cotton / polyester mixed twisted yarn of FIG.

FIG. 4 is a characteristic chart showing electrode titers of tourmaline / barium titanate-added nylon and conventional tourmaline-added nylon.

[Explanation of symbols]

 1 Artificial fiber 2 Tourmaline 3 Ferroelectric

Claims (2)

[Scope of utility model registration request] 1. A functional fiber product having a spontaneous / inducing electrode, characterized by comprising artificial fibers containing a large number of micronized tourmaline crystals and a large number of strong induction conductors as all or a part of constituent fibers. . 2. The functional textile product having spontaneous / induction electrodes according to claim 1, wherein the functional textile product having the spontaneous / induction electrodes is a woven fabric, a knitted fabric or a non-woven fabric.