WO2002019780A1 - Portable card for preventing static electricity and its manufacturing method - Google Patents

Portable card for preventing static electricity and its manufacturing method Download PDF

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Publication number
WO2002019780A1
WO2002019780A1 PCT/KR2001/001417 KR0101417W WO0219780A1 WO 2002019780 A1 WO2002019780 A1 WO 2002019780A1 KR 0101417 W KR0101417 W KR 0101417W WO 0219780 A1 WO0219780 A1 WO 0219780A1
Authority
WO
WIPO (PCT)
Prior art keywords
static electricity
portable card
synthetic resin
preventive agent
thin plate
Prior art date
Application number
PCT/KR2001/001417
Other languages
French (fr)
Inventor
Ho-Geun Kwon
Jae-Wook Kwon
Kyung-Hee Lee
Original Assignee
Kwon Ho Geun
Kwon Jae Wook
Lee Kyung Hee
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kwon Ho Geun, Kwon Jae Wook, Lee Kyung Hee filed Critical Kwon Ho Geun
Publication of WO2002019780A1 publication Critical patent/WO2002019780A1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F1/00—Preventing the formation of electrostatic charges
    • H05F1/02—Preventing the formation of electrostatic charges by surface treatment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges

Definitions

  • the present invention relates to a portable card for preventing static electricity caused in people's daily life and its manufacturing method, and more particularly, to a portable card for preventing static electricity and its manufacturing method that is made of a thin plate formed by mixing a synthetic resin such as PNC or PE and a conductor such as Ag or Cu obtained in a high- grinding manner, at an adequate ratio and otherwise, made by applying a preventive agent for preventing the static electricity on the surface of a synthetic resin having a predetermined size to be cross-linked to each other, whereby during kept in the human body, it can enable the static electricity generated from the human body to be earthed in the atmosphere, thereby eliminating it at the moment when it generates.
  • static electricity means the electricity that does not move and can be caused by collecting positive or negative charges on the one of two things at the time when the two things rub against each other or contact with each other.
  • An amount of the static electricity is varied depending upon various variants such as, for example, the kind of material, proximity, the roughness of surface, the pressure of contact, the degree of friction, the speed of separation and the like.
  • the static electricity is most generated at a low temperature and low moisture, especially during the seasons between fall and spring when the atmosphere is dry.
  • a method for manufacturing a portable card for preventing static electricity which comprises the steps of making a synthetic resin such as PVC, PE, ABS or acrylic in fine particle forms and producing a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al and mixing the synthetic resin and the preventive agent at an adequate ratio and heating the resulting mixture at a predetermined temperature.
  • the portable card which is made of the synthetic resin, is applied by a coating mixed with the preventive agent and an adhesive on the both surfaces thereof.
  • the portable card on which advertising characters or designs are printed is transparently coated by the preventive agent, thereby being utilized for the purpose of advertising.
  • the portable card is provided with an integrated circuit that is built on the thin plate of the synthetic resin and a coating layer with a laminating film containing the preventive agent that is coated on the surface of the circuit, thereby preventing the static electricity on credit cards.
  • FIG. 1 is a sectional view of a portable card for preventing static electricity according to a first embodiment of the present invention
  • FIG. 2 is a perspective view of a portable card for preventing static electricity according to a second embodiment of the present invention
  • FIG. 3 is a perspective view of an example of the advertising characters written on the portable card of the present invention.
  • FIG. 1 is a sectional view of a portable card for preventing static electricity according to a first embodiment of the present invention
  • FIG. 2 is a perspective view of a portable card for preventing static electricity according to a second embodiment of the present invention
  • FIG. 3 is a perspective view of an example of the advertising characters written on the portable card of the present invention.
  • a portable card for preventing static electricity which includes the steps of: making a synthetic resin such as PVC, PE, ABS or acrylic in a fine particle form; producing a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al; mixing the synthetic resin and the preventive agent at a ratio of 100:3% to 100:10% by weight and subjecting the resulting mixture to a heat treatment at a temperature in a range of 190 °C to 240 °C; subjecting the resulting mixture to injection molding or extruding molding to form a thin plate; and cutting the thin plate in an appropriate size.
  • a synthetic resin such as PVC, PE, ABS or acrylic
  • a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al mixing the synthetic resin and the preventive agent at a ratio of 100:3% to 100:10% by weight and subjecting the resulting mixture to a heat treatment at a temperature in a range of 190 °C
  • a portable card for preventing static electricity which includes the steps of: forming a thin plate with a synthetic resin such as PVC, PE, ABS or acrylic; producing a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al; mixing an adhesive such as isopropylalcohol (I.P.A), UV ink, or general transparent ink and the preventive agent at a ratio of 40:2% to 40:5% by weight to produce a coating; and applying the coating to the synthetic resin.
  • a synthetic resin such as PVC, PE, ABS or acrylic
  • a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al mixing an adhesive such as isopropylalcohol (I.P.A), UV ink, or general transparent ink and the preventive agent at a ratio of 40:2% to 40:5% by weight to produce a coating
  • an adhesive such as isopropylalcohol (I.P.A), UV in
  • the coating contains the preventive agent for preventing the static electricity, it may be applied on an aluminum plate or paper, not on the synthetic resin.
  • the card is made of the thin plate of the synthetic resin.
  • Ag is subjected to a high-grinding treatment to produce a fine powder having about 500 meshes that forms a preventive agent.
  • the synthetic resin and the preventive agent are mixed at a ratio of 100:3% to 100:10%) by weight and the resulting mixture is subjected to a heat treatment at a temperature in a range of 190 °C to 240 °C.
  • a synthetic resin, PVC is processed in a fine particle form by using equipment and subjected to injection molding or extruding molding to form a thin plate.
  • Advertising characters as shown in FIG. 3 are written on the thin plate. Ag is subjected to a high-grinding treatment to produce a fine powder having about 500 meshes that forms a preventive agent.
  • I.P.A Isopropylalcohol
  • the preventive agent and the adhesive are mixed at a ratio of 40:2%> to 40:5% by weight to produce a coating.
  • the coating is applied to the synthetic resin in a substantially thin thickness and then dried.
  • the card produced in the above-mentioned process has surface resistance in a range of 10 6 ⁇ /cm 2 to 10 12 ⁇ /cm 2 , which is always kept.
  • the static electricity is always caused when the surface resistance of 10 12 ⁇ /cm 2 or more exists.
  • the synthetic resin such as PVC or PE has the surface resistance in a range of 10 13 ⁇ /cm 2 to 10 14 ⁇ /cm 2 and hence, it contains the static electricity all the time.
  • Fabric such as nylon or nonferrous metal exhibits the surface resistance having a higher value than the static electricity and hence, it also contains the static electricity.
  • the static electricity is induced in such a manner that if an object charged with negative electricity moves to a neutral object, positive charges are induced around the portion where the object contacted with the neutral object and negative charges are induced around the portion away from the portion where the object contacted with the neutral object, because of the electric force acted between the charged particles of the object. If the negative charges are earthed and momentarily discharged, the neutral object is charged with positive electricity, such that the static electricity is caused against the two objects.
  • the static electricity is discharged in the atmosphere and therefore, in the preferred embodiments of the present invention it is kept in the range of 10 6 ⁇ /cm 2 to 10 12 ⁇ /cm 2 , the static electricity is discharged in the atmosphere, that is, earthed in the atmosphere.
  • the portable card according to the present invention can keep its surface resistance in the range of 10 6 ⁇ /cm 2 to 10 12 ⁇ /cm 2 by the application of the preventive agent for preventing the static electricity, such that even if the static electricity is momentarily caused, it can be earthed and discharged in the atmosphere for a very short time (for example, about 0.05 seconds).
  • a portable card for preventing static electricity which has the following advantages: since a preventive agent for preventing the static electricity is mixed with a synthetic resin or coated thereon, the portable card can have a function of preventing the static electricity; and since it can be convenient to be carried, the static electricity caused during people's daily life can be earthed and completely discharged in the atmosphere, which prevents the electric shocks that may be applied to their human body.
  • the portable card of the present invention can be printed with the advertising characters or designs and thus utilized for the purpose of advertisement. While the present invention has been described with reference to a specific embodiment, the description is illustrative of the invention and is not to be construed as limiting the invention. Various modifications may occur to those skilled in the art without departing from the true spirit and scope of the invention as defined by the appended claims.

Abstract

This invention relates to a portable card for preventing static electricity around daily life and its manufacturing method. It is made of a thin plate mixed with synthetic resins such as PVC, PE, etc. and processed conductors such as Ag, Cu, etc. with high-grinding methods at adequate ratios. It eliminates static electricity as soon as it occurs by earthing static electricity around the human body. This invention provides a card preventing static electricity by mixing or coating a static electricity preventive with synthetic resins. The above card is easy to carry, being like a credit card, and by carrying this card, static electricity is eliminated.

Description

PORTABLE CARD FOR PREVENTING STATIC ELECTRICITY AND ITS MANUFACTURING METHOD
Technical Field
The present invention relates to a portable card for preventing static electricity caused in people's daily life and its manufacturing method, and more particularly, to a portable card for preventing static electricity and its manufacturing method that is made of a thin plate formed by mixing a synthetic resin such as PNC or PE and a conductor such as Ag or Cu obtained in a high- grinding manner, at an adequate ratio and otherwise, made by applying a preventive agent for preventing the static electricity on the surface of a synthetic resin having a predetermined size to be cross-linked to each other, whereby during kept in the human body, it can enable the static electricity generated from the human body to be earthed in the atmosphere, thereby eliminating it at the moment when it generates.
Background Art
Generally, static electricity means the electricity that does not move and can be caused by collecting positive or negative charges on the one of two things at the time when the two things rub against each other or contact with each other. An amount of the static electricity is varied depending upon various variants such as, for example, the kind of material, proximity, the roughness of surface, the pressure of contact, the degree of friction, the speed of separation and the like. The static electricity is most generated at a low temperature and low moisture, especially during the seasons between fall and spring when the atmosphere is dry.
For example, most of people have experienced electric shocks at the time when their bodies contact with the body of their car during they get in or out their car in winter or at the time when they hold the handles of doors in their home or office. This is caused by the static electricity of about 5,000V that has been generated to transfer and receive charges when people walk on the ground like an asphalt tile. Furthermore, numerous electronic equipment has been developed and used for the convenience of people, such that a large amount of static electricity is generated from display devices thereof, for example, LCD panels mounted for displaying the operation states of the electronic equipment. This is always caused at the moment when their body comes in contact with the display devices and thus applies electric shocks to them.
In addition, the static electricity- can be generated by clothes rubbing against each other, which is applied even while people move. Until now, however, there is no detailed method for preventing the static electricity. Therefore, there is a need for introduction of the method as soon as possible. As you know, people in modern society are keeping two or more cards such as credit cards or telephone cards in their body which are used only for their original purpose, not for preventing static electricity.
Disclosure of Invention It is an object of the present invention to provide a portable card for preventing static electricity and its manufacturing method, which is made by applying a static electricity preventive agent on the surface of a synthetic resin, whereby during kept in the human body, it can enable the static electricity generated from the human body to be earthed in the air, thereby eliminating it at the moment when it generates.
To accomplish this and other objects of the present invention, there is provided a method for manufacturing a portable card for preventing static electricity, which comprises the steps of making a synthetic resin such as PVC, PE, ABS or acrylic in fine particle forms and producing a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al and mixing the synthetic resin and the preventive agent at an adequate ratio and heating the resulting mixture at a predetermined temperature.
Preferably, the portable card, which is made of the synthetic resin, is applied by a coating mixed with the preventive agent and an adhesive on the both surfaces thereof.
Preferably, the portable card on which advertising characters or designs are printed is transparently coated by the preventive agent, thereby being utilized for the purpose of advertising. Preferably, the portable card is provided with an integrated circuit that is built on the thin plate of the synthetic resin and a coating layer with a laminating film containing the preventive agent that is coated on the surface of the circuit, thereby preventing the static electricity on credit cards. Brief Description of the Drawings
Further objects and advantages of the invention can be more fully
understood from the following detailed description taken in conjunction with the
accompanying drawings, in which:
FIG. 1 is a sectional view of a portable card for preventing static electricity according to a first embodiment of the present invention;
FIG. 2 is a perspective view of a portable card for preventing static electricity according to a second embodiment of the present invention; and FIG. 3 is a perspective view of an example of the advertising characters written on the portable card of the present invention.
Best mode for Carrying Out the Invention
Hereinafter, an explanation of the configuration of a portable card according to the preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a sectional view of a portable card for preventing static electricity according to a first embodiment of the present invention, FIG. 2 is a perspective view of a portable card for preventing static electricity according to a second embodiment of the present invention, and FIG. 3 is a perspective view of an example of the advertising characters written on the portable card of the present invention.
As shown in FIG. 2, there is provided a portable card for preventing static electricity according to a second embodiment of the present invention, which includes the steps of: making a synthetic resin such as PVC, PE, ABS or acrylic in a fine particle form; producing a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al; mixing the synthetic resin and the preventive agent at a ratio of 100:3% to 100:10% by weight and subjecting the resulting mixture to a heat treatment at a temperature in a range of 190 °C to 240 °C; subjecting the resulting mixture to injection molding or extruding molding to form a thin plate; and cutting the thin plate in an appropriate size.
As shown in FIG. 1, otherwise, there is provided a portable card for preventing static electricity according to a first embodiment of the present invention, which includes the steps of: forming a thin plate with a synthetic resin such as PVC, PE, ABS or acrylic; producing a preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al; mixing an adhesive such as isopropylalcohol (I.P.A), UV ink, or general transparent ink and the preventive agent at a ratio of 40:2% to 40:5% by weight to produce a coating; and applying the coating to the synthetic resin.
In the portable card according to the first embodiment of the present invention, since the coating contains the preventive agent for preventing the static electricity, it may be applied on an aluminum plate or paper, not on the synthetic resin. However, considering that it can be carried with people and its production cost, it is most preferable that the card is made of the thin plate of the synthetic resin.
The present invention will now be described in detail by way of the first and second embodiments.
(Embodiment 1) A synthetic resin, PVC is processed in a fine particle form by using equipment.
Ag is subjected to a high-grinding treatment to produce a fine powder having about 500 meshes that forms a preventive agent. The synthetic resin and the preventive agent are mixed at a ratio of 100:3% to 100:10%) by weight and the resulting mixture is subjected to a heat treatment at a temperature in a range of 190 °C to 240 °C.
The heated mixture is subjected to injection molding or extruding molding to form a thin plate that is cut in an appropriate size. (Embodiment 2)
A synthetic resin, PVC is processed in a fine particle form by using equipment and subjected to injection molding or extruding molding to form a thin plate.
Advertising characters as shown in FIG. 3 are written on the thin plate. Ag is subjected to a high-grinding treatment to produce a fine powder having about 500 meshes that forms a preventive agent.
Isopropylalcohol (I.P.A) as an adhesive is prepared.
The preventive agent and the adhesive are mixed at a ratio of 40:2%> to 40:5% by weight to produce a coating. The coating is applied to the synthetic resin in a substantially thin thickness and then dried.
The card produced in the above-mentioned process has surface resistance in a range of 106 Ω/cm2 to 1012 Ω/cm2, which is always kept.
Generally, the static electricity is always caused when the surface resistance of 1012 Ω/cm2 or more exists.
The synthetic resin such as PVC or PE has the surface resistance in a range of 1013 Ω/cm2 to 1014 Ω/cm2 and hence, it contains the static electricity all the time.
Fabric such as nylon or nonferrous metal exhibits the surface resistance having a higher value than the static electricity and hence, it also contains the static electricity.
The static electricity is induced in such a manner that if an object charged with negative electricity moves to a neutral object, positive charges are induced around the portion where the object contacted with the neutral object and negative charges are induced around the portion away from the portion where the object contacted with the neutral object, because of the electric force acted between the charged particles of the object. If the negative charges are earthed and momentarily discharged, the neutral object is charged with positive electricity, such that the static electricity is caused against the two objects. When the surface resistance is in a range of 1011 Ω/cm2 or less, the static electricity is discharged in the atmosphere and therefore, in the preferred embodiments of the present invention it is kept in the range of 106 Ω/cm2 to 1012 Ω/cm2, the static electricity is discharged in the atmosphere, that is, earthed in the atmosphere. The portable card according to the present invention can keep its surface resistance in the range of 106 Ω/cm2 to 1012 Ω/cm2 by the application of the preventive agent for preventing the static electricity, such that even if the static electricity is momentarily caused, it can be earthed and discharged in the atmosphere for a very short time (for example, about 0.05 seconds). Industrial Applicability
As set forth in the foregoing, there is provided a portable card for preventing static electricity, which has the following advantages: since a preventive agent for preventing the static electricity is mixed with a synthetic resin or coated thereon, the portable card can have a function of preventing the static electricity; and since it can be convenient to be carried, the static electricity caused during people's daily life can be earthed and completely discharged in the atmosphere, which prevents the electric shocks that may be applied to their human body.
In addition, the portable card of the present invention can be printed with the advertising characters or designs and thus utilized for the purpose of advertisement. While the present invention has been described with reference to a specific embodiment, the description is illustrative of the invention and is not to be construed as limiting the invention. Various modifications may occur to those skilled in the art without departing from the true spirit and scope of the invention as defined by the appended claims.

Claims

What Is Claimed Is:
1. A manufacturing method a portable card for preventing static electricity, said method comprising the steps of: making a synthetic resin such as PVC, PE, ABS or acrylic in a fine particle form; producing a preventive agent having a fine powder obtained by high- grinding a conductor such as Ag, Cu, or Al; mixing said synthetic resin and said preventive agent at a ratio of 100:3% to
100:10% by weight and subjecting the resulting mixture to a heat treatment at a temperature in a range of 190 °C to 240 °C; subjecting the resulting mixture to injection molding or extruding molding to form a thin plate; and cutting said thin plate in an appropriate size.
2. A manufacturing method a portable card for preventing static electricity, said method comprising the steps of: forming a thin plate with a synthetic resin such as PVC, PE, ABS or acrylic; producing a preventive agent having a fine powder obtained by high- grinding a conductor such as Ag, Cu, or Al; mixing an adhesive such as isopropylalcohol (I.P.A), UV ink, or general transparent ink and said preventive agent at a ratio of 40:2%> to 40:5%) by weight to produce a coating; and applying said coating to said synthetic resin.
3. The method according to claim 2, wherein said adhesive is selected from at least one or more of the isopropylalcohol (I.P.A), the UV ink, and the general transparent ink.
4. A portable card for preventing static electricity which is made by mixing a synthetic resin such as PVC, PE, ABS or acrylic and a. preventive agent having a fine powder obtained by high-grinding a conductor such as Ag, Cu, or Al and by subjecting the resulting mixture to injection molding or extruding molding to form a thin plate.
5. A portable card for preventing static electricity which is made by applying a coating on the both surfaces of a thin plate made of a synthetic resin such as PVC, PE, ABS or acrylic.
6. The portable card according to claim 4, wherein said coating is produced by mixing the preventive agent having the fine powder obtained by high-grinding said conductor such as Ag, Cu, or Al and an adhesive.
7. The portable card according to any of claims 4 to 6 which is provided with an advertising image on the surface thereof and utilized for the purpose of advertisement.
8. The portable card according to any of claims 4 to 6 which is provided with an integrated circuit that is built on the thin plate of said synthetic resin and a coating layer with a laminating film containing said preventive agent that is coated on the surface of said integrated circuit, to prevent the static electricity on credit cards.
9. The portable card according to any of claims 4 to 6 which is applied in telephone cards.
PCT/KR2001/001417 2000-08-26 2001-08-22 Portable card for preventing static electricity and its manufacturing method WO2002019780A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2000/49906 2000-08-26
KR10-2000-0049906A KR100383020B1 (en) 2000-08-26 2000-08-26 Portable Card for Static Electricity and Its Manufacturing Method

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WO2002019780A1 true WO2002019780A1 (en) 2002-03-07

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WO (1) WO2002019780A1 (en)

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WO2012122124A3 (en) * 2011-03-04 2013-01-03 Visa International Service Association Payment card system and method
CN104885574A (en) * 2013-01-09 2015-09-02 Sika技术股份公司 Coating system with electrostatic discharge protection

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US4380699A (en) * 1980-07-09 1983-04-19 U.S. Philips Corporation Portable, identifying element constructed as a lamination of sheets
US4699830A (en) * 1986-06-30 1987-10-13 Baxter Travenol Laboratories, Inc. Laminated sheet material for packaging electronic components
US5017260A (en) * 1989-04-12 1991-05-21 Bradford Company Anti-static coated paperboard or similar rigid material
US5405681A (en) * 1991-12-12 1995-04-11 C.I. Kasei Co., Ltd. Decorative material including a transfer sheet having an antistatic function and a method for production thereof
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012122124A3 (en) * 2011-03-04 2013-01-03 Visa International Service Association Payment card system and method
KR20140021592A (en) * 2011-03-04 2014-02-20 비자 인터네셔널 서비스 어소시에이션 Payment card system and method
US8807437B2 (en) 2011-03-04 2014-08-19 Visa International Service Association Payment card system and method
US9058548B2 (en) 2011-03-04 2015-06-16 Visa International Service Association Payment card system and method
US9858517B2 (en) 2011-03-04 2018-01-02 Visa International Service Association Payment card system and method
US10150328B2 (en) 2011-03-04 2018-12-11 Visa International Service Association Payment card system and method
KR102007000B1 (en) * 2011-03-04 2019-08-02 비자 인터네셔널 서비스 어소시에이션 Payment card system and method
CN104885574A (en) * 2013-01-09 2015-09-02 Sika技术股份公司 Coating system with electrostatic discharge protection
CN104885574B (en) * 2013-01-09 2017-06-09 Sika技术股份公司 Coating system with anti-electrostatic-discharge

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Publication number Publication date
KR100383020B1 (en) 2003-05-09
KR20010000228A (en) 2001-01-05

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