JPS6239102Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to conductive gold and silver thread, and the woven and knitted products using this invention, such as tapes, nets, textiles, etc., will not be charged with static electricity. It also has extremely good electromagnetic wave shielding properties.

(Technical means) This invention consists of laminating Al foil, Cu foil, and various other metal foils with a thickness of 3μ to 100μ on one side of a base material made of paper or cellophane, and if necessary, the surface is coated on the metal foil. A flat thread with a protective layer so as to conduct electricity,
This conductive gold and silver thread is made by twisting a core thread made of conductive fibers in a bellows manner with metal foil on the outside. This will be explained below with reference to the drawings.

The reason why paper or cellophane is used instead of plastic film as the base material 1 is because plastic film itself is electrically charged, but paper or cellophane originally has extremely low electrical chargeability or has extremely high hygroscopicity than plastic film. This is because it is not itself electrically charged.

The reason for the adoption of Metal Foil 2 is that when a metal film is produced using a conventionally known thin film production method such as vacuum evaporation, when it is later made into a woven or knitted fabric, the metal film tends to crack when folded, and in that case, the metal film is too thin. However, with metal foil, if the thickness is at least 3μ, this will not happen.

The thickness of the metal foil 2 is from 3μ to 100μ, because if it is thinner than 3μ, there is a risk that the metal foil will be cut due to the above-mentioned reason, and if it is thicker than 100μ, it will be unsuitable for weaving or knitting.

The protective layer 3 is provided on the metal foil 2 if necessary, but it is provided so that the surface is electrically conductive. That is, it is preferable to form the protective layer from a conductive resin or to form the protective layer extremely thin, for example, 1 μm or less.

Base material 1 and 3μ to 100μ made of paper or cellophane
A flat thread 4 in which a metal foil 2 having a thickness of Twist the material into a bellows with No. 1 on the inside, that is, wrap it around the material at appropriate intervals.

The reason why the metal foil 2 is on the outside and the bellows twisting is that when a woven or knitted fabric is later formed using this invention, the conductive fiber that is the core yarn and the metal foil are connected at the part where the gold and silver threads of this invention cross. This is so that the core thread and the metal foil of the flat thread become one conductive thread as a whole. Further, when a protective layer is provided on the metal foil if necessary for this purpose, the surface of the protective layer is made to have conductivity.

Examples of conductive fibers include carbon fibers, but of course the fibers are not limited to this, and when used in the core yarn, they may be singular or plural.

(Effect of the invention) Since this invention is constructed as described above, when a woven or knitted fabric is formed using this, the surfaces of the core thread and the flat thread come into contact with each other, and both of them have electrical conductivity, so that the entire thread becomes one electrically conductive thread. Electrostatic charging does not occur, and the electromagnetic wave shielding effect is extremely remarkable. No matter how many flat threads with a metal vapor deposited layer are used, the conductive part is extremely small, so it is completely useless especially in terms of shielding electromagnetic waves. However, in this design, it is not measured in angstroms, but is 3μ to 100μ, compared to the metal vapor deposition layer. In addition to using an extremely thick metal foil, not only that, but also a specific winding around a specific core thread, the metal foil and the core thread become integrated as a conductor, which makes the electromagnetic wave shielding effect particularly remarkable. It is.

Furthermore, since this invention uses a relatively thick metal foil of 3 to 100 microns, rather than being ultra-thin like a metal vapor deposited layer, even when bent, the metal foil will not crack at the bent portion and break the metal foil at that point.

Furthermore, since this invention uses paper or cellophane instead of plastic film for the base material, the base material is not electrically charged at all, and from this point of view as well, the antistatic effect is remarkable.

Note that the woven or knitted fabric can be arbitrarily formed into a normal woven fabric, net, tape, or the like.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged sectional view showing an example of a flat thread used in this invention, and FIG. 2 is a partially front view showing an embodiment of this invention. 1... Base material, 2... Metal foil, 3... Protective layer, 4
...Flat thread, 5... Core thread.

Claims (1)

[Scope of utility model registration request] 3μ~ on one side of the base material made of paper or cellophane.
Al foil, Cu foil, and various other metal foils with a thickness of 100 μ are pasted together, and if necessary, a flat thread with a protective layer on the metal foil so that the surface conducts electricity is attached to the core thread made of conductive fibers. A conductive gold and silver thread characterized by being twisted into a bellows as an outer layer.