JPS6116115Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a flexible anti-static body, and particularly to a flexible anti-static body in the form of a carpet that can prevent or remove static electricity.

If you walk on a carpet with dry socks on, the friction between the socks and the raised part of the carpet will cause
High-voltage static electricity is generated, which can give unpleasant shocks to pedestrians, and can also lead to unexpected accidents in explosive atmospheres.

In order to prevent such accidents, some carpets have stainless fibers blended into the base fabric and pile of the carpet to make the carpet itself conductive.
It is difficult to evenly blend carpet fibers and wool or synthetic resin fibers. For this reason, if an attempt is made to increase the discharge characteristics by reducing the mixing ratio of the stainless fibers to give the carpet resistance, it becomes impossible to provide uniform conductivity to the entire carpet. In addition, increasing the blending ratio to prevent this non-uniformity will not only increase the price of the carpet itself, but also reduce the electrical resistance, causing large sparks between the charged body and the stainless steel fibers of the carpet when the charged body approaches. will occur.

This invention was made in order to improve the various inconveniences mentioned above, and its purpose was to create a structure that is inexpensive and simple, can completely eliminate static electricity without sparking, and has an antistatic effect. The object of the present invention is to provide a flexible antistatic body.

FIG. 1 is a sectional view showing an embodiment of this invention. In the figure, 1 is a conductive base fabric layer, which is made of a woven fabric made of synthetic fibers such as acrylic fibers or natural fibers such as cotton, and has metal fibers woven into every 10th warp and weft yarn to make it conductive. It is. 2 is a synthetic rubber with a specific resistance of approximately 10 ² mixed with fine metal powder or carbon black.
The resistor layer has a thickness of about [Ω·cm] to 10 ⁹ [Ω·cm]. 3 is a short fiber made of nickel plating on a synthetic resin fiber such as acrylic fiber or nylon fiber, and is flocked to the resistor layer 2 by electrodeposition.

Next, the sheet electrification effect of this invention will be explained.

First, after grounding the conductive base layer 1 at a point E, when a charged body is brought close to the top of the short fibers 3, since the tips of the short fibers are sharp, the short fibers 3 located near the charged body The tip has a high potential gradient. Then, when the charged body is brought closer to the short fiber 3, a discharge occurs between the charged body and the short fiber 3, and the electric charge of the charged body travels through the short fiber 3, reaches the resistance direction, and further passes through the resistor layer 2. and flows away through the conductive base layer 1 to the ground side. Note that since the resistor layer 2 is a high-resistance layer, the high energy of the charges is converted into thermal energy and absorbed in the resistor layer 2. Therefore, no sparks are generated between the charged body and the short fibers 3.

Next, when a substance such as a dielectric material strongly contacts the short fibers 3 and strong static electricity is generated between them,
The generated charge passes from the short fiber 3 through the resistor layer 2,
This discharge flows away to the ground side through the conductive base fabric layer 1, but as described above, the high energy of the generated charge is absorbed in the resistor layer 2. There is no spark between the two.

In addition, in this device, since the resistance of the conductive base layer 1 is lower than the resistance value of the resistor layer 2, the back side of the resistor layer 2, that is, the part in contact with the conductive base layer 1, is almost at ground potential. It is maintained. Therefore, no matter where the discharge occurs, uniform discharge characteristics can be obtained regardless of the distance from that part to the grounded part.

This invention can be used as a carpet by laying it on a flat floor, but since it is flexible, it is wound around a cylindrical body to make two rolls, and these rolls can be used to make, for example, synthetic resin film that comes out of a film manufacturing machine. It can also be used to remove static electricity that has accumulated on the surface of the film during the manufacturing process via rolls. When this invention is applied to a film with such a soft surface, if the short fibers are hard, the film surface may be damaged. In such cases, the short fibers 3 can be made softer by using a softer material, and then heat-setting the short fibers to make the naps flow in one direction to reduce the frictional resistance between them and the surface of the film. There is no possibility of damaging the surface of the film.

In addition, when the antistatic body of the present invention is wound around a roll or the like as described above, a conductive adhesive layer 4 is provided on the lower side of the conductive base layer 1 as shown in FIG. It is best to stick it on the surface of the roll.

As explained in detail above, in this invention, a resistor layer is provided on the conductive base layer, so the high energy of the charge flowing from the short fibers to the conductive base layer is absorbed by the resistor layer. . Therefore, when used on a carpet, static electricity can be discharged without giving an electric shock to the human body, and the static electricity generated on the carpet disappears immediately, resulting in an antistatic effect. Furthermore, in applications other than carpets, ie, when removing charges from an object, this can be done without sparks, so accidents caused by spark discharge will not occur at all. Furthermore, this antistatic body has a structure in which short fibers are attached to the resistor layer and flocked on the conductive base fabric layer, so it has a structure that is different from conventional ones that are made by weaving pile threads into the base fabric like carpets. It is easy to manufacture and can be produced at low cost. Furthermore, short fibers with metal plating on the surface are made of synthetic resin, so unlike metal fibers such as stainless steel fibers, they can be produced by heat processing. It is possible to easily perform processing such as bending the tips of the short fibers into a curled shape or making the flocked short fibers flow in one direction. Moreover, this processing has many effects not found in the past, such as the ability to easily remove surface charges from materials such as films whose surfaces are soft and easily damaged.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of this invention, and FIG. 2 is a sectional view of another embodiment. In the figure, 1 is a conductive base layer, 2 is a resistor layer, and 3 is a short fiber.

Claims (1)

[Scope of utility model registration request] Synthetic resin short fibers with metal plating on the surface are flocked to the resistor layer on the conductive base layer, and the surface resistance of the resistor layer is greater than the surface resistance of the conductive base layer. Features a flexible anti-static body.