JPH01291804A - Antistatic footwear and component therefor and machining thereof - Google Patents

Abstract

PURPOSE:To efficiently eliminate the static electricity on a human body by machining conductive material such as conductive threads or nonwoven fabric with a specific electric resistance value to be exposed on the upper or sole material surface of the footwear so that its one end is brought into contact with the human body. CONSTITUTION:A conducting material such as the yarn doubling or knitting yarns (referred to as conducting threads 1) made of a cotton mixing material of fibers containing a metal or a metal compound or containing carbon and using fibers with the electric resistance value of 1X10<8>OMEGA or below as a base is machined to be exposed on the upper surface or the bottom material surface of the footwear. Its one end is constituted in touch directly with a human body or via another conducting material. When this footwear is worn, the static electricity on the human body can be efficiently removed.

Description

[Detailed Description of the Invention] (a) Industrial Application Field This invention uses processed materials of conductive fibers for some of the parts used in general footwear as a measure to prevent problems caused by electrostatic charging of the human body. The purpose of the present invention is to provide static-eliminating footwear that mainly utilizes corona discharge.

(B) Conventional technology The electrostatic charge on the human body has rapidly increased with changes in the living environment in recent years, causing many problems in daily life and industrial activities.

There are two ways to prevent this, one is to prevent static electricity, and the other is to remove the static electricity that has been charged.In the case of Moeha, there are many causes of static electricity, and it is difficult to take countermeasures.Currently, we are using the latter method. is mainly used, and this includes anti-static footwear.

Current antistatic footwear is for work use, typified by safety shoes, and the development of general footwear is delayed. The static elimination structure is also grounded using conductive rubber, and the conductive path to the human body uses metal rivets or carbon-containing presspods that do not bounce easily. Furthermore, the material of the sole is heavy black solid rubber, and there are many problems in directly applying this structure to general footwear.

On the other hand, in the clothing industry, a method of corona discharge is being used with work clothes made of conductive fibers, but this is mainly used to prevent dust from adhering to the body, and static electricity removal shoes are also used to eliminate static electricity that has accumulated on the human body. is necessary.

(c) Problems that the invention aims to solve In our daily lives, there are many chemical products used in clothing, furniture, and structures, which can generate static electricity, and with the spread of air conditioners. , the frequency of receiving electric shocks increased throughout the year.

On the other hand, the number of machines that dislike static electricity, such as computers, automatic equipment, and communication equipment, as well as equipment that generates static electricity, is increasing, and countermeasures are needed. Furthermore, with the development of an industrial society and the transformation to a motorized society, the air in urban areas has become polluted.
Dust adhesion to clothing and skin due to electrostatic charging of the human body increases, which is a great blessing not only from a health perspective but also from a hygiene perspective.

Currently, the most reliable method for removing static electricity is by using footwear, and in order to solve the above-mentioned problem, it is urgently necessary to provide footwear for use other than work use with the ability to eliminate static electricity.

Unlike work shoes, general footwear is intended to be worn in unspecified places, and the function of the sole material is also required to be anti-slip, abrasion resistant, oil resistant, lightweight, etc. , color, shape, etc., must also be satisfied.

In addition, it is necessary to eliminate static electricity on insulating floors, where the static elimination function of the current grounding method does not work, and to take measures to prevent static electricity on carpets. On the other hand, if ready-made footwear could be processed in some way and given a static elimination function, it would have a large economic effect.

We also want to add anti-static function to women's pants, which emphasize fashion, in a way that does not damage their appearance, prevent dust absorption, and contribute to maintaining beauty.

In any case, these measures must be methods that can meet diversified market needs and must be processing methods that suppress cost increases.

(d) Means for solving the problem In the present invention, a processed material of conductive fiber is used for footwear parts,
In addition to eliminating static electricity using a processing method that does not impair the characteristics of existing general footwear, the excellent discharging properties of conductive fibers are used to corona discharge static electricity, making it possible to eliminate static electricity even when the floor material is insulating. This aims to promote discharge into the air and lower the potential.

It has been known for a long time that static electricity causes corona discharge, and there is little literature on it.In the process of submitting the present invention, as a result of many experiments over a long period of time, we found conditions that allow corona discharge to occur and the residual potential to approach zero. We focused on the following three points.

The first point is to select a conductive material that has good discharge efficiency and flexibility. Bending motion is essential for footwear, and the materials used for the electrodes and conductive materials have a low degree of bending strain.
A material with high tensile strength and high frictional strength is required, and conductive fibers are optimal for this purpose. In particular, the tips of the short fibers serve as needle electrodes, allowing for rapid and multi-angle discharge.

Materials for conductive fibers include carbon-containing fibers,
There are fibers containing duck compounds such as nickel, titanium, or copper. In particular, fibers containing copper compounds have antibacterial properties due to the ionic action of copper and are preferred as footwear parts. It is necessary that the electrical resistance value of these conductive fibers is 1X10'Ω or less, and in order to prevent electric shock, it is desirable that all or part of the conductive material has a resistance value of IX105Ω or more.

``The second point is the shape of the conductive material and the discharge electrode.

There are three ways to use conductive fibers as footwear parts: thread-woven fabrics and non-woven fabrics, and here we will mainly consider the use of conductive yarns, conductive non-woven fabrics, and processed materials thereof.

There are many places where sewing thread is used in footwear, such as 20th and 3rd thread.
When using a thin conductive thread with count 0, the thread digs into the sewing material.
The electric field becomes narrower, making it less efficient as a discharge electrode. Therefore, it is preferable that the conductive thread used as the electrode be a twisted or knitted thread having a diameter of 11 or more, or a bundle of thin threads, so that the lines of electric force are wide and reach the ground plane. Examples of the use of conductive thread electrodes are the combination mocha stitch (Figure 3) and the pinch mocha stitch (Figure 4).
(Fig.), etc., and the side seam of the cup sole (first stitch).
and Fig. 5), and the exposed seams (
There are sewing processes on the bottom material such as Fig. 2), and there are also lock stitching and decorative stitching. On the other hand, it is also widely used as a conductive material that connects electrodes and the human body.

There are several types of conductive nonwoven fabrics, including the needle punch method (a method in which single threads are entwined with a hook), a method in which a cotton-like sheet material is hardened with a resin binder, and a method in which a board is formed using a fused fiber blend. It is also hand-squeezed, making it convenient to use it for different purposes. In particular, board materials using fused fibers as a binder have extremely good water absorption.

The conductive nonwoven fabric has good efficiency as a discharge electrode and also has the effect of preventing other types of charging. There are two ways to use it as an electrode: by gluing or burning it into the non-grounded part of the lower surface of the sole, or by processing it into a grounded part to create a grounding method and create a synergistic effect with the discharge method.

As conductive materials, there are methods for using them in the insole and sole, insertable anvils, and cup insoles (insoles with a rounded heel). In addition, a paper-like thin conductive nonwoven fabric is pasted to the back of the insole material, and name cloth, etc. is sewn on with conductive thread to expose the conductive part to the surface. , becomes a conductive material that comes into contact with the human body.

Thirdly, the position of the discharge poles is important.

The lines of electric force of static electricity match the direction of the electric field (direction of the electrode, 3), and enter and leave the surface of the conductor (in front of the electrode and the ground body) perpendicularly. Therefore, the best position for the electrodes to be provided on the footwear is on the bottom surface of the outsole in terms of direction and distance. In addition, when using the sewing threads of the shoe cover or the sewing threads on the sides of the cup sole as electrodes, the conductive threads should be positioned protruding from the sides of the footwear, and care must be taken to ensure that they do not cast a shadow on a vertical line to the ground.

The exposed area and sewing distance of the electrodes do not have a direct effect on the discharge efficiency to the ground, but the direction and position of the electrodes change due to bending during walking movements. - Due to ionization of the surrounding air on the insulating floor. In order to promote static elimination, conductive threads should be used for a long time and conductive non-woven fabrics should be used widely.

The distance of discharge varies depending on the potential difference and humidity, but the closer it is to the ground plane, the better; at least one end of the electrode should be 20 m from the ground plane.
It should be installed so that it is within m.

The above are the conditions regarding corona discharge.

The electric discharge method is used to remove static electricity from women's shoes, especially Vanbus.
Exposed electrodes may impair the sensitivity of the shoe, so a grounding method that uses the inside of the heel is better. As an example, a conductive heel block (9) as shown in FIG. 8 is used. The structure is such that a pore is created in the center of the heel block that passes through the top and bottom, a conductive thread or metal wire is passed through this, and both ends are bent, the upper part is covered with conductive non-woven fabric, and the lower part is held in place by a conductive top lift. It is something. Static electricity removal processing for ready-made shoes involves penetrating the pores in the heel block to the upper surface of the midsole.
The tip of the conductive thread or metal wire to be inserted should be exposed to the upper surface of the insole, and the conductive insole should be attached. Another method is to add conductivity to the heel block by incorporating carbon.

Another method is to easily impart static elimination properties to ready-made shoes by processing conductive fiber materials. - For example, as shown in Figure 7, a processed material of conductive non-woven fabric or conductive thread is glued and fixed to the bottom of the footwear near the toe, and this allows conductive thread, metal studs, or conductive wire such as copper wire to be fixed. Connect the insole so that it is exposed on the upper surface of the insole, and then lay a single insole made of conductive non-woven fabric on top of this, or use a composite insole made of conductive non-woven fabric using conductive thread sewn to the branded fabric. Paste the material and bring it into contact with the human body.

In addition, for footwear with laces, a shoelace made of interwoven or processed conductive thread is used, the center part of the shoelace is passed through the shoelace, and the shoelace is brought into contact with the human body, and both ends are hung on the side of the footwear to generate a discharge.

The above-described static elimination method is a method that can be used for the diversified products of today, and can use a common processing material, and is more advantageous than any other method in terms of processing costs.

(Po) Effect In footwear with corona discharge, is the static electricity charged on the human body exposed by the processed material of the connected conductive fibers? Electricity is conducted to the Ii pole and discharges instantaneously before and after the footwear touches the ground. However, on an insulating floor, since there is no subject to discharge, the air around the electrodes is charged and the potential is gradually lowered, which takes some time. When walking motion is added to this, the ionized air around the electrodes is replaced, and the discharge time is greatly reduced.

In addition, by widely using conductive nonwoven fabric for the midsole material and outsole,
It also suppresses static electricity buildup from flooring materials caused by walking.
Humidity due to sweat on the insole activates electrical discharge from inside the shoe,
Furthermore, if walking motion is added, it becomes possible to lower the potential by walking even on an insulated floor.

(F) Example First, the mixing ratio of conductive fibers was changed by using a blended fiber of 10% water-absorbing fiber containing copper sulfide, 15% heat-sealing fiber, and 75% polyester, and processing it into twisted yarn and non-woven board material to make it conductive. It was used as a material.

The materials used for the footwear are Clarino for the cover and polyurethane foam sole for the sole. Electrode processing on the cover material is done in combination mocha (Figure 3) and pinch mocha (Figure 4), using human-shaped conductive thread for the upper and lower threads so that both ends of the thread are in direct contact with the human body. Processed into.

As for conductive thread processing on the bottom material, we used Opanke (Fig. 5) lockstitch thread and decorative stitching (Figs. 1 and 2) on the bottom material for business use.The former was used directly with the conductive thread, while the latter Each has a structure in which they are in contact with the human body through a conductive inner sole.

In addition, a conductive nonwoven fabric was applied to the entire surface of the inner sole of a ready-made slipper, and the heel was sewn together with the sole material using conductive thread.

To eliminate static electricity from ready-made shoes, an oval conductive non-woven fabric with a thickness of 11 is glued to the bottom of the outsole near the toe of men's shoes with urethane soles using a special pressure-sensitive tape. Drill a hole through it and caulk it with a 21'nm diameter aluminum stud.
The conductive heel pad shown in Figure 7 (a) was attached.

For women's bumps, the top lift and insole of ready-made shoes are removed, a hole is made that passes through the bottom of the heel block and the top of the midsole, a conductive thread is threaded through this, the top and bottom ends are bent, and conductive adhesive is applied. It was temporarily fixed, the bottom surface was sandwiched between conductive rubber and nailed, and the top surface was pasted with a conductive anvil on top of the insole.

(g) Effects of the invention The static elimination effect was evaluated by charging the human body.

First, wear test shoes, stand on an insulating board, charge your fingertips, and measure the level of charge. Next, while measuring the potential with one hand, move one foot onto the other ground plate. The test potential was carried out in two stages: 10,000v and 2,000v.

In all of the shoes of the example, the potential became zero as soon as one foot was placed on the ground plate, and in the shoes with electrodes provided on the ground plane, the potential became zero at a height of 10 m1'' above the ground plate.

On the other hand, actual wear tests were carried out for 3 months in the winter using various types of corona discharge shoes, including ready-made shoes that had been treated to eliminate static electricity, and were worn by 5 car users who are constantly exposed to electric shocks and 6 people in workplaces that generate static electricity. However, no one was struck by the electric shock.

The test on the insulated floor was a reception area with a carpeted floor.
The experiment was conducted at a room temperature of 23 degrees Celsius and a humidity of 38% (with heating). The charged object was peeled and charged 1.0 times when it stood up using a synthetic leather sofa, and the average value of the charge was 6,900 V for regular shoes and 5,500 V for conductive shoes made by other companies.

On the other hand, the insole of the present invention is made of conductive non-woven fabric on the entire surface of the insole.
In the case of shoes with stitched thread leading out of the non-treading part, the average charge level is 2.7.
It is unusually low at 10■, and the variation in potential from time to time is also 10
It was within %. In addition, in a walking test on a carpet after being charged with an average of 6,000V, with normal shoes, the potential increased by 500 to 1,000V when walking, and with conductive shoes made by other companies, no change in potential was observed, but with the product of the present invention, The residual potential drops to 100v to 200v after 10 to 13 steps on the carpet.

For slippers with conductive thread sewn with conductive non-woven fabric pasted on the inner bottom of the slippers, when walking on a carpet with a 2,000V charge, the potential decreased each time the heel turned, and the discharge was completed after only a few steps. .

[Brief explanation of the drawing]

Figure 1 shows a cupsole processed with conductive thread. Figure 2 shows an example of conductive thread processing on the bottom material. Figures 3 and 4 show conductive thread processing on the cover. Figure 5 shows Obanke conductive thread side stitching. Figure 6 shows an example of processing conductive nonwoven fabric on the bottom material. Figure 7 shows static electricity removal processing on ready-made shoes. Figure 8 is a diagram of the static electricity removal processing of the bread boots. Figure 9 shows conductive processing of the heel block. 1... Conductive thread, 2... Conductive nonwoven fabric, 3... Bottom material,
4... Brand cloth, 5... Thin conductive nonwoven fabric, 6...
Non-woven fabric electrode, 7... Insole, 8... Conductive thread or metal wire, 9... Heel block, 10... Top lift. Patent Applicant Nokri Co., Ltd. Representative Shoji Ikeda 3 Figures 3 Groups! 1m 20 洟71B

Claims (1)

[Claims] 1. A blended material of fibers containing a metal or a metal compound, or containing carbon, the electrical resistance of which is 1×1.
A conductive material such as a doubled or knitted yarn (hereinafter referred to as conductive yarn) or a nonwoven fabric or a nonwoven fabric board (hereinafter referred to as conductive nonwoven fabric) based on fibers having a resistance of 0^6Ω or less (hereinafter referred to as conductive fiber), It is characterized by having a structure in which it is processed so as to be exposed on the surface of the footwear or the surface of the sole material, and one end thereof is in contact with the human body directly on the inner surface of the footwear, or in contact with the human body through another conductive material. Static electricity eliminating footwear. 2. Decorative stitching on the sides of the cupsole (Fig. 1), or decorative stitching on the untreaded part of the bottom or around the sole (Fig. 2)
An outsole of static-eliminating footwear, characterized in that a conductive thread is used in a structure such that one end of the conductive thread is in direct contact with the lower surface of the insole or in contact with the lower surface of the insole through another conductive material. . 3. A processed material of conductive thread or a conductive non-woven fabric is glued or baked so that it is exposed on the bottom surface of the bottom material, and one end of the conductive material is
Either directly in contact with the lower surface of the insole or through other conductive material,
An outsole for antistatic footwear characterized by having a structure that makes contact with the lower surface of the midsole. 4. Glue a conductive non-woven fabric to the back of the shoe insole (full insole and heel insole) and sew the branded fabric with conductive thread, or attach both ends of the branded fabric based on the conductive non-woven fabric.
A conductive processing method for the insole that is hidden behind the insole. 5. Insoles and insoles for shoes made of conductive nonwoven fabric mixed with at least 8% of fibers containing copper compounds, and heat-sealable fibers mixed as a binder. 6. A conductive material is used or a conductive process is applied to the top lift (10) of the bottomed women's shoes, and a conductive thread or metal wire is connected to the top lift (10) through the heel center vertically. A static electricity removal processing method that is characterized by exposing the insole to the upper surface of the insole, and then bringing it into contact with the human body using a conductive insole. 7. Use a conductive heel block containing carbon, or use a heel block with a flat conductive material on the top surface of the heel block and a conductive top lift on the bottom surface, with both conductive materials conductively connected through the inside of the block. A static electricity removal processing method for women's shoes, in which these heel blocks are nailed from the upper surface of the midsole, and a conductive liner is applied to the entire sole to make contact with the human body. 8. Glue a processed material of conductive non-woven fabric or conductive thread to the underside of the sole of the footwear with the sole attached to create a discharge electrode, and then use conductive thread or other conductive material to create a discharge electrode. A method for removing static electricity from footwear, and a discharge component, which has a structure in which a conductive connection is exposed on the upper surface of the sole and is in contact with the human body either directly or through a conductive insole.