KR20120093661A - Wiper blade for vehicle - Google Patents

Abstract

PURPOSE: A wiper blade for a vehicle is provided to remove rainwater, dust, and oil stuck on a windshield of a vehicle by using substrate occurring potential difference. CONSTITUTION: A wiper blade for a vehicle comprises a blade rib part(100). The blade rib part contains at least two substrates for generating potential difference. The substrates for generating potential difference are selected from polyacetylene, polyaniline, polypyrrole, polythiophene, and poly sulfur nitride.

Description

Wiper blade for vehicle {Wiper blade for vehicle}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper blade, and more particularly to a vehicle wiper blade necessary for securing a good field of view such as a windshield of a vehicle.

The wiper blade for the vehicle is used to wipe rain, dust, etc. attached to the windshield or rear glass of the vehicle. However, even when it rains a lot, even if the wiper blade is operated, rain water may stay in the wiped portion, and the watch may be very poor.

In addition, as the car washes using an automatic car wash, if wax is attached to the windshield, it causes diffuse reflection at night driving, and the clock becomes very poor. In addition, an oil film may be formed to cause vibration of the wiper blade, such that the wiper may not operate smoothly.

As an example of a method for solving such a problem, a method of dispersing rain water droplets by applying a separate water repellent agent to the windshield surface to form a water repellent coating. However, even if a water repellent film is formed, it is necessary to remove rainwater and dust on the glass by operating the wiper to secure a good timepiece. In addition, when the wiper blade is operated on the water-repellent glass surface, the water repellent coating is gradually peeled off by friction by the wiper blade, and the effect thereof is reduced in a short time. Moreover, the application of the water repellent to the glass is very cumbersome, and if the water repellent treatment does not form a water film on the glass surface, the wiper blade may not operate smoothly, and there may be a problem of shaking (chattering).

Looking at the technique disclosed in the Republic of Korea Patent Publication No. 2002-0091721 as a way to solve this problem, here is to coat a coating containing a powder, such as silicon powder, polytetra fluoroethylene, molybdenum sulfide and the like on the wiper lip It is described that the life of the water repellent coating can be extended by reducing the friction between the windshield surface and the wiper blade, and the operability can be improved.

Since the above technique also presupposes that the water repellent is applied on the glass, it is not possible to ultimately solve the trouble of applying the water repellent on the glass.

On the other hand, as a patent having a water repellent function is disclosed in Japanese Patent Laid-Open No. 2000-016253, a wiper blade is formed by a wiper blade formed of a silicone rubber composition containing porous particles impregnated with a silane compound or silicone oil. A technique of forming a film such as a water repellent coating with a water repellent treatment agent by only operating it is disclosed. However, silicone rubber wiper blades containing silicone oil are less wear-resistant than conventional natural rubber materials, and the deterioration of wiping and slipping properties is remarkable. When an oil film is present on the windshield of a vehicle, the oil film cannot be effectively removed. The problem arises that the vision is obstructed and chattering occurs during operation of the blade.

Therefore, it has been desired to develop a vehicle wiper blade which can prevent the chattering phenomenon and remove the oil film.

In order to solve the above problems, an object of the present invention is to remove the oil film at the same time as removing the rain film, dust, etc. attached to the windshield of the vehicle, and to remove the oil film only by operating the wiper blade without any special work. have.

Another object of the present invention is to provide a wiper blade for a vehicle that ensures good visibility over a long period of time and has a smooth operation without chattering.

Still another object of the present invention is to apply to the wiper blade made of natural rubber, which is optimal as a material of the wiper blade, to add a function of removing the oil film, without impairing the wear resistance of the natural rubber, and waterproofing of the oil film removal. To provide a vehicle wiper blade that can function.

In order to achieve the above object, the present invention provides a wiper blade for a vehicle, wherein the blade lip includes two or more potential difference generating materials, and the lip is divided into two or more potential difference generating materials. .

In another aspect, the present invention provides a wiper blade for a vehicle, wherein the blade lip includes two or more potential difference generating materials, and two or more potential difference generating materials are formed on the surface of the lip.

In another aspect, the present invention provides a wiper blade for a vehicle, wherein the blade lip includes two or more potential difference generating materials, and two or more potential difference generating materials are formed at the distal end of the lip.

In addition, the present invention is the potentiometric material is made of a conductive polymer material, the conductive polymer material is polyacetylene (polyacetylene), polyaniline (polyaniline), polypyrrole (polypyrrole), polythiophene, polysulfuritride (poly It provides a vehicle wiper blade, characterized in that at least two selected from the group consisting of sulfur nitride).

In addition, the present invention, the potential difference generating material comprises a metal powder, wherein the lip portion is formed by dividing into two first division and second division, the first powder metal powder is lithium powder, barium powder, calcium powder, sodium powder , Magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, lead powder is selected from at least one, and the second powder metal powder is selected from at least one of copper powder, silver powder, platinum powder, gold powder. It provides a vehicle wiper blade, characterized in that.

In addition, the present invention, the potential difference generating material comprises a metal powder, the surface of the lip portion is formed to be divided into two sides, the metal powder of one side of the lip portion is lithium powder, barium powder, calcium powder, sodium powder, magnesium powder , Aluminum powder, zinc powder, iron powder, nickel powder, tin powder, lead powder is selected from one or more, the metal powder of the other side of the lip portion is selected from copper powder, silver powder, platinum powder, gold powder. A vehicle wiper blade is provided.

In addition, in the present invention, the potential difference generating material comprises a metal powder, the end portion is divided into a first area and a second area, the metal powder of the first area is lithium powder, barium powder, calcium powder, sodium powder, magnesium At least one selected from powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder and lead powder, and the metal powder of the second area of the terminal is selected from at least one of copper powder, silver powder, platinum powder and gold powder. It provides a vehicle wiper blade, characterized in that.

In another aspect, the present invention provides a vehicle wiper blade, characterized in that the binder and the curing agent is mixed with the potential difference generating material, the mixed material is coated on the lip surface.

In another aspect, the present invention provides a vehicle wiper blade of the oil film removal function, characterized in that the thickness of the coating film is coated 3 ~ 100㎛.

In another aspect, the present invention provides a vehicle wiper blade, characterized in that the blade can remove the oil film of the vehicle glass by the lip portion.

The wiper blade composition for a vehicle according to the present invention contains a substance that generates a potential difference, adds a function of removing oil film at the same time as removing rain, dust, and the like attached to the windshield of the vehicle, and operating the wiper blade without special operations. Just remove the oil film is effective.

The wiper blade using the composition according to the present invention operates smoothly without a chattering phenomenon, the glass using this has the effect of ensuring a good view over a long time.

1 to 4 show the shape of the vehicle wiper blade lip portion according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation to or in the numerical value of the manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

The wiper blade for a vehicle according to the exemplary embodiment of the present invention may include a potential difference generating material.

1 to 3 show a schematic shape of a vehicle wiper blade according to an embodiment of the present invention.

The lip portion is formed of a potential difference generating material, and may be divided into two or more.

Referring to FIG. 1, as one embodiment of the present invention, a lip part may be divided into two divisions and formed into a first division and a second division. The potential difference generating material may include a metal powder, wherein the first powder metal powder is lithium powder, barium powder, calcium powder, sodium powder, magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin At least one of powder and lead powder may be selected, and the metal powder of the second division may be selected from at least one of copper powder, silver powder, platinum powder, and gold powder.

2 illustrates that the potential difference generating material is included on the surface of the lip of the blade. The potential difference generating material may be a conductive polymer material or a metal powder.

The ribs of the vehicle wiper blades have surfaces 110 and 120 on both sides, which include an electrically conductive material that generates a potential difference on the surface of the ribs of the wiper blades. If present, the surface spacing between both rib portions of the blade can be electrically connected.

When the rainwater 10 is located at the lip distal end 130 (see FIG. 3), ions may be generated to sufficiently exhibit an ionic effect. In addition, although the potential difference may be connected to a battery between both surface films, in this invention, a potential difference can be made using the substance which produces a potential difference between both surface films.

In one embodiment of the potential difference generating material may be a conductive polymer material or a metal powder.

Non-limiting examples of the conductive polymer material may be selected from the group consisting of polyacetylene, polyaniline, polypyrrole, polythiophene, poly sulfur nitride, and the like. have.

When the conductive polymer material is included on both surfaces 110 and 120 of the blade lip and the rainwater 10 is present at the lip end 130, a potential difference occurs to activate the rainwater 10 by the ion effect of the material dissolved in the rainwater 10. The rainwater 10 may act as a surfactant to decompose and remove the oil film existing on the glass surface of the vehicle.

In addition, two or more metal powders having different ionization tendencies may be included in the ribs 110 and 120 of the blades.

One side 110 of the rib portion may include a metal having a high ionization tendency, and the other side 120 of the rib portion may include a metal having a low tendency to ionize. The potential difference may be generated on the surface of the blade by including a metal having a difference in ionization tendency on the surface of the blade.

Non-limiting examples of the metal powder is lithium powder, barium powder, calcium powder, sodium powder, magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, lead powder, copper powder, silver powder, platinum powder , Gold powder and the like can be selected from two or more.

When one side 110 of the lip includes a metal having a high ionization tendency, and the other side 120 includes a metal having a low ionization tendency, the rainwater 10 exhibiting acidity may serve as a battery as an electrolyte. In other words, it is possible to generate a potential difference between both surfaces without using a battery. When the potential difference is generated, water is activated due to the ionic effect of the material dissolved in the rainwater 10, which acts as a surfactant, so as to decompose and remove the oil film as well as the rainwater and dust existing on the glass surface of the vehicle.

In order to generate the potential difference, the potential difference generating material uses a metal powder which tends to be ionized. The known ionization tendency of the metal is as follows. That is, Li, Ba, Ca, Na, Mg, Al, Zn, Fe, Ni, Sn, Pb, (H), Cu, Hg, Ag, Pt, and Au in the order of increasing tendency for ionization. In order to exhibit an efficient ion effect, it is necessary to select a dissimilar metal having a large difference in ionization tendency. In consideration of safety and practicality, non-limiting examples include materials including Li, Ba, Ca, Na, Mg, Al, Zn, Fe, Ni, Sn, Pb on one side of the blade, and Cu, Ag on the other side It is preferable to include a material containing Pt, Au.

That is, the substance which produces dislocation can be formed in the surface part in thickness of 3-100 micrometers thick after a film | membrane as a surface layer part at least in a lip part. The blade lip configured in this way can be operated without chattering due to the smooth action on both sides.

The metal powder which produces a potential which can be adopted by the present invention is not particularly limited, but specifically, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, copper powder, silver powder, platinum powder, gold powder, etc. The metal powder on one side of the blade lip 110 may be used among lithium powder, barium powder, calcium powder, sodium powder, magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, and lead powder. The metal powder on the other side 120 of the lip portion is preferably selected from at least one of copper powder, silver powder, platinum powder, and gold powder.

In particular, it is more preferable to use aluminum powder or zinc powder on one side of the lip portion, and copper powder or silver powder on the other side of the lip portion.

The average particle diameter of the metal powder is preferably in the range of 1 nm to 60 μm, and the particle size of the powder exceeds 60 μm, thereby reducing the wiping blade.

The binder and the curing agent may be mixed with the metal powder, and the blending amount of the metal powder is preferably used in an amount of 40 to 1000 parts by weight, more preferably 100 to 500 parts by weight, based on 100 parts by weight of the total amount of the binder and the curing agent. If it is less than 40 weight part, sufficient electrical conductivity will not be obtained, and if it exceeds 1000 weight part, the intensity | strength of a coating film will fall and durability will fall.

The binder included in the composition of the metal powder, the binder, and the curing agent of the present invention is not particularly limited, but any binder that can be specifically used may be useful or water soluble, and may be polyester polyol resin, polyether polyol resin, polyurethane resin, Silicone modified urethane resin, fluoro olefin resin, polyvinylidene difluoride resin, tetrafluoro ethylene resin, hexafluoro propylene resin, vinylidene fluoride resin, epoxy resin, urethane modified epoxy resin, silicone modified epoxy resin, Diglycidyl ether resin, silicone resin, alkyl modified silicone resin, phenyl modified silicone resin, fluorine modified silicone resin, acrylic resin, acrylic polyol resin, silicone modified acrylic resin, methyl methacrylate-butadiene copolymer, acrylonitrile Butadiene Copolymerization Sieve, styrene-butadiene-based copolymer, butadiene-based resin, chloroprene latex, urethane latex, room temperature-curable silicone resin, and the like, and a double polyether polyol resin may be particularly preferable. The polyether polyol resin is excellent in flexibility, adhesion and wear resistance. 1, 2 or more can be used if it is satisfying the adhesiveness with respect to a wiper blade rubber, and followability among such binder resins.

The method for preparing a composition according to an embodiment of the present invention is not particularly limited, but the binder is dissolved and diluted with an organic solvent such as methyl ethyl ketone, toluene, xylene, butyl acetate, ethanol, or water, and the film-forming agent in the solution. Can be obtained by mixing, dispersing oils and solid lubricants. The solvent which melt | dissolves and dilutes a binder can use together 1 or 2 types or more using the solvent which melt | dissolves a binder completely.

In addition, additives such as dispersing agents, antifoaming agents, leveling agents, emulsifiers, ultraviolet absorbers, and antisettling agents may be further included as necessary. Fillers such as powder, silicone resin powder, acrylic powder, carbon black, graphite, and the like may be further included.

In addition, a curing agent and a curing catalyst may be added to the above-described composition as necessary, and the wiper blade may be coated by a method such as spraying, dipping, brushing, or the like at room temperature or by heat curing to form a coating layer. In this case, as the curing agent, polyisocyanate, polyamide amine, aliphatic polyamine, alicyclic diamine, tertiary amine or the like can be used. Moreover, tin type, platinum type, titanium type, organic peroxide, etc. can be used as a hardening catalyst.

Figure 4 shows a schematic shape of a blade lip according to another embodiment of the present invention.

Referring to FIG. 4, a potential difference generating material may be formed by dividing the lip end surface into two parts, which corresponds to one embodiment, and two or more potential difference generating materials are formed at any position of the lip end to generate a potential difference. I can do it.

When the lip end portion is divided into two parts, the potential difference generating material may include a metal powder, and the lip end portion may be divided into a first area and a second area. The metal powder of the first area is at least one selected from lithium powder, barium powder, calcium powder, sodium powder, magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, and lead powder. The metal powder of may be selected from at least one of copper powder, silver powder, platinum powder, gold powder.

In addition, although not shown, non-limiting examples may include a potential difference generating material by dividing the lip surface and the lip end portion into two or more portions. In this case, the potentiometric metal material may be a conductive polymer material or a metal powder as described above.

Meanwhile, according to the present invention, the coating film may be formed on the lip surface or the lip end surface of the blade by using a potential difference generating material, and the thickness of the coating film is preferably 3 to 100 μm. If the thickness of the coating film is less than 3 μm, durability of the coating may not be obtained, and if the thickness of the coating film is more than 100 μm, the wiper blade may be unaffected.

10 to 60 minutes are preferable at 50-180 degreeC of hardening conditions, A heating temperature and time are set in consideration of the hardening temperature of a binder and the heat resistance temperature of a wiper blade rubber material.

Examples of the wiper blade which can be coated in the present invention include natural rubber, ethylene-propylene rubber, isopropylene rubber, styrene-butadiene rubber, chloroprene rubber, fluorine rubber, silicone rubber, and mixed compositions thereof. The poor adhesion material can be coated after the silane primer treatment if necessary.

The wiper blade formed according to an embodiment of the present invention has the effect of removing the oil film of the vehicle glass by the lip portion.

Hereinafter, embodiments of the present invention will be described in detail.

Example  One

57.2 parts by weight of a polyester polyol resin was dissolved and diluted in 325 parts by weight of methyl ethyl ketone and 325 parts by weight of toluene, and 40 parts by weight of copper powder having an average particle diameter of 0.36 µm was mixed and dispersed to prepare a composition.

42.8 parts by weight of polyisocyanate was added to the composition such that the total nonvolatile content of the binder and the curing agent was 100 parts by weight. The obtained composition was spray-coated on one side of the wiper blade made of a natural rubber material so as to have a coating layer thickness of 15 μm after drying.

Further, 57.2 parts by weight of polyester polyol resin was dissolved and diluted in 325 parts by weight of methyl ethyl ketone and 325 parts by weight of toluene, and the composition was prepared by mixing and dispersing 40 parts by weight of aluminum powder having an average particle diameter of 12 µm.

42.8 parts by weight of polyisocyanate was added to the composition such that the total nonvolatile content of the binder and the curing agent was 100 parts by weight. The obtained composition was spray coated on the other side of the wiper blade made of natural rubber so as to have a thickness of 15 μm after drying.

Example  2 to 6

A composition was prepared in the same manner as in Example 1, but the metal powder, the binder, and the solvent were coated on a natural rubber wiper blade with a spray thickness of 15 μm as in Table 1 and Table 2, and cured.

 The quantity of the composition of Examples 1-6 is as follows. Values represent parts by weight.

Of blade On one side  Composition to be coated

Example  One Example  2 Example  3 Example  4 Example  5 Example  6 Polyester polyol resin 57.2 57.2 57.2 57.2 57.2 57.2 Copper powder 40 300 1000 Silver powder 40 300 1000 Methyl ethyl ketone 325 1000 2750 325 1000 2750 toluene 325 1000 2750 325 1000 2750 Polyisoyanate 42.8 42.8 42.8 42.8 42.8 42.8

Composition coated on the other side of the blade

Example  One Example  2 Example  3 Example  4 Example  5 Example  6 Polyester polyol resin 57.2
57.2 57.2 57.2 57.2 57.2 Aluminum powder 40 300 1000 Zinc powder 40 300 1000 Methyl ethyl ketone 325 1000 2750 325 1000 2750 toluene 325 1000 2750 325 1000 2750 Polyisoyanate 42.8 42.8 42.8 42.8 42.8 42.8

Comparative example  1 to 6

In the same manner as in Examples 1 to 6, the metal powder (copper powder, silver powder, aluminum powder, zinc powder) was carried out without any use. That is, the metal powder was not used and the composition of the other materials was used in the same manner as in Examples 1 to 6, respectively.

One. Oil film removal  Performance test

A test apparatus conforming to the test apparatus employed for the wiper blade performance evaluation specified in JIS D5710 is used, and a pseudo-oil film liquid is first applied to the windshield thinly and left to dry completely. Operate 10,000 times with 500 ㏄ / min water spray on the windshield uniformly. The operating speed of the wiper blades was 45 cycles / min. This experiment is evaluated by the oil film remaining rate after 10,000 cycles. However, if the chattering is large and does not work smoothly, the test is stopped. The composition of the pseudo oil film solution was mixed and dissolved in 5 mass% of solid wax (manufactured by Blue Label Surluster) and 95 mass% of toluene in the above-mentioned formulation to obtain a pseudo oil film solution.

Oil film remaining rate (%) Oil film remaining rate (%) Example 1 0 Comparative Example 1 95 Example 2 0 Comparative Example 2 100 Example 3 0 Comparative Example 3 98 Example 4 0 Comparative Example 4 96 Example 5 0 Comparative Example 5 100 Example 6 0 Comparative Example 6 98

2. Durability Test

The test apparatus based on the test apparatus employ | adopted for the wiper blade performance evaluation prescribed | regulated to JISD5710 is used, and it operates 300,000 times, spraying 500 micrometers / min of water uniformly on a windshield. The operating speed of the wiper blades was 45 cycles / min. Every 50,000 times of operation is checked for the presence of erosion (chattering) and chattering. On the other hand, the erosion is evaluated when the wiper blade is lowered. Good cleanability can be said to be excellent in durability. If the wiper blade is too chattered during the test and does not run smoothly, the test is stopped.

(1) evaluation score of incongruity

5: can be wiped almost completely

4: Less than 2 thin lines left

3: Less than 5 thin lines left

2: partially thick line left

1: A thick line remains in the shape of a band

50,000 times 100,000 times 150,000 times 200,000 times 250,000 times 300,000 times L R L R L R L R L R L R Example 1 5 5 5 5 5 5 5 5 5 5 5 5 Example 2 5 5 5 5 5 5 5 5 5 5 5 5 Example 3 5 5 5 5 5 5 5 5 5 5 5 5 Example 4 5 5 5 5 5 5 5 5 5 5 5 5 Example 5 5 5 5 5 5 5 5 5 5 5 5 5 Example 6 5 5 5 5 5 5 5 5 5 5 5 5 Comparative Example 1 3 2 2 One - - - - - - - - Comparative Example 2 3 3 2 2 - - - - - - - - Comparative Example 3 3 2 2 One - - - - - - - - Comparative Example 4 4 3 3 2 One - - - - - - - Comparative Example 5 3 4 3 2 One - - - - - - - Comparative Example 6 One 2 One - - - - - - - - -

Where R is the driver's seat and L is the passenger seat glass.

The unfilled column (-) stops the test because the wiper does not operate normally due to significant chattering.

(2) the presence of chattering

○: no chattering

△: the lower end is slightly shaken

×: chattering oil

50,000 times 100,000 times 150,000 times 200,000 times 250,000 times 300,000 times Example 1 ○ ○ ○ ○ ○ ○ Example 2 ○ ○ ○ ○ ○ ○ Example 3 ○ ○ ○ ○ ○ ○ Example 4 ○ ○ ○ ○ ○ ○ Example 5 ○ ○ ○ ○ ○ ○ Example 6 ○ ○ ○ ○ ○ ○ Comparative Example 1 △ × - - - - Comparative Example 2 △ × - - - - Comparative Example 3 ○ △ × - - - Comparative Example 4 △ × - - - - Comparative Example 5 △ × - - - - Comparative Example 6 × - - - - -

The unfilled column (-) stops the test because the wiper does not operate normally due to significant chattering.

The present invention described above is not limited to the above-described embodiments, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be obvious to him.

Claims (10)

In the vehicle wiper blade,
The blade lip includes two or more potential difference generating material,
And the lip portion is formed to be divided into two or more by a potential difference generating material. In the vehicle wiper blade,
The blade lip includes two or more potential difference generating material,
Vehicle wiper blades, characterized in that the potential difference generating material is formed on the lip surface to distinguish two or more. In the vehicle wiper blade,
The blade lip includes two or more potential difference generating material,
Vehicle wiper blades, characterized in that the potential difference generating material is formed in two or more at the distal end of the lip portion. The method according to any one of claims 1 to 3,
The potentiometric material is made of a conductive polymer material, the conductive polymer material is polyacetylene (polyacetylene), polyaniline (polyaniline), polypyrrole (polypyrrole), polythiophene (polythiophene), poly sulfur nitride (poly sulfur nitride) Vehicle wiper blades, characterized in that at least two selected from the group consisting of. The method of claim 1,
The potential difference generating material includes a metal powder,
The lip portion is formed by dividing into two divided into first division and second division,
The metal powder of the first segment is selected from at least one of lithium powder, barium powder, calcium powder, sodium powder, magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, and lead powder. The powder is a vehicle wiper blade, characterized in that at least one of copper powder, silver powder, platinum powder, gold powder is selected. The method of claim 2,
The potential difference generating material includes a metal powder,
The lip surface is formed to be divided into two sides,
The metal powder on one side of the lip portion is selected from at least one of lithium powder, barium powder, calcium powder, sodium powder, magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, and lead powder. The metal powder of the vehicle wiper blade, characterized in that at least one selected from copper powder, silver powder, platinum powder, gold powder. The method of claim 3,
The potential difference generating material includes a metal powder,
The distal end is divided into a first area and a second area,
The metal powder of the first area is at least one selected from lithium powder, barium powder, calcium powder, sodium powder, magnesium powder, aluminum powder, zinc powder, iron powder, nickel powder, tin powder, and lead powder. A metal wiper blade for a vehicle having two areas, wherein at least one of copper powder, silver powder, platinum powder and gold powder is selected. The method of claim 2,
A binder and a hardener are mixed with the potential difference generating material, and the mixed material is coated on a lip surface. 9. The method of claim 8,
The thickness of the coating film to be coated is a vehicle wiper blade of the oil film removal function, characterized in that 3 ~ 100㎛. The method according to any one of claims 1 to 3,
The blade wiper blade for a vehicle, characterized in that the oil film of the vehicle glass can be removed by the lip portion.

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