KR100708350B1 - Wall paper for protecting particle adherence - Google Patents

Abstract

The present invention relates to an anti-vibration anti-vibration wallpaper that has been subjected to an antistatic treatment so that charged dust particles are prevented from adhering to the wallpaper in a space where careful particle management such as a clean room for semiconductor production is to be performed. Dust-proof wallpaper according to the present invention, the support sheet layer comprising a vinyl chloride resin; An adhesive layer laminated on a lower surface of the substrate layer to adhere the substrate layer to a wall; A release paper layer detachably attached to a lower surface of the pressure-sensitive adhesive layer to protect the pressure-sensitive adhesive layer; And a conductive coating layer laminated on an upper surface of the support sheet layer, the conductive coating layer including a conductive polymer to prevent the dust particles from adhering to the surface by discharging the charged dust particles.

Poly (3,4-ethylenedioxy thiophene), clean room

Description

Wall paper for protecting particle adherence

1 is a schematic view for explaining the dustproof treatment of the wall surface in a conventional clean room.

2 is a schematic exploded perspective view of the anti-vibration wallpaper according to a preferred embodiment of the present invention.

3 is a schematic cross-sectional view taken along line III-III of FIG. 2.

4 is a view showing the chemical formula of the conductive polymer used in the anti-vibration wallpaper shown in FIG.

FIG. 5 is a schematic diagram for describing a state of use of the anti-vibration wallpaper shown in FIG. 2.

6 is a schematic view for explaining the anti-vibration wallpaper according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100 ... dustproof wallpaper 10 ... support sheet layer

20 ... Adhesive layer 25 ... Conductive sheet layer

30 ... Release layer 40 ... Printed layer

50 ... print protective layer 60 ... conductive coating layer

w ... wall f ... curved surface

The present invention relates to an anti-vibration wallpaper, and more particularly, it is possible to solve the problem that the charged dust particles are attached to the wallpaper by electric force and difficult to remove, and the construction is simple even when the wall to which the wallpaper is to be attached is formed in a curved surface. The present invention relates to a dustproof wallpaper having an improved structure.

In a so-called clean room where a semiconductor is produced or a place where a high density integrated circuit is produced, fine particles such as dust particles are attached to the product, which may cause defects or errors in the product. In the industrial field where such fine particles can have a significant impact on the product, a lot of efforts are being made for particle management, such as installing a special air flow system.

However, despite these efforts, many problems arise due to charged dust particles. Electric charges may be generated on the surface of the fine particles for a variety of reasons, which are generally caused by static electricity between two friction objects or by an external strong electric field. When the fine particles are charged due to the above-described paths, the static electricity existing on the surface of the particles does not flow, but accumulates on the surface of the particles, and is discharged momentarily upon contact with another object, for example, a high density integrated circuit chip. This may cause an abnormality and the integrated circuit may malfunction due to an electric field.

In addition, the charged dust particles are attached to the wall by the electric force has a problem that it is difficult to remove easily. In other words, when the wall surface or the wall surface of the clean room is charged for various reasons, the charged dust particles are attached to the wall by electric force and are not easily removed even if the air purifying system is operated or carried out continuously. It causes a lot of problems in managing particles such as rooms.

As described above, in order to prevent the charged dust particles from being instantaneously discharged to the product, in the conventional clean room and the like, a conductive panel made of metal is installed on the floor to reduce such harmful effects, but no clear solution is provided for the wall surface. . 1 is a schematic view for explaining the dustproof treatment of the wall surface in a conventional clean room. As shown in FIG. 1, in the past, attempts were made to solve the above problems by attaching a conductive panel p used as a flooring material to a wall surface w, but the cost of the material was not high and economical as well. The panel p is not made of a flexible material. In general, the panel p has a problem in that construction is difficult on the wall on which the curved surface f is formed.

In addition, attempts have been made to solve the above problems by painting conductive walls on walls. That is, to solve the problem of charged dust particles by coating a conductive paint prepared by uniformly dispersing and mixing carbon (C), fine metal powder or ferrite in a general organic non-conductive paint. However, the method of finely dispersing these conductors and dispersing them uniformly is not easy to process for fine powdering, it takes a lot of material cost, and the dispersing mixture also differs between the physical properties of organic and inorganic or metallic materials. It is difficult to uniformly disperse the mixture, and the aesthetic problems are also exposed due to the black color of carbon.

The present invention is to solve the above problems, the dust is prevented from being attached to the charged dust particles by the electric force, the construction is easy to be installed on the curved wall as well as the structure is improved dustproof wall to simplify the change or repair during use The purpose is to provide.

Dust-proof wallpaper according to the present invention for achieving the above object, the support sheet layer comprising a vinyl chloride resin, in order to prevent the charged dust particles are attached; An adhesive layer laminated on a lower surface of the substrate layer to adhere the substrate layer to a wall; A release paper layer detachably attached to a lower surface of the pressure-sensitive adhesive layer to protect the pressure-sensitive adhesive layer; And a conductive coating layer laminated on an upper surface of the support sheet layer and including a conductive polymer to prevent the charged dust particles from adhering to the surface by discharging the charged dust particles.

According to the present invention, the conductive polymer of the conductive coating layer is preferably poly (3,4-ethylene dioxy thiophene).

In addition, according to the present invention, in order to improve the aesthetics, the upper surface of the support sheet layer is preferably provided with a printed layer on which a predetermined pattern is printed.

In addition, according to the present invention, it is preferable that a print protection layer made of vinyl chloride is further provided between the print layer and the conductive coating layer so as to protect the pattern printed on the print layer.

 In addition, according to the present invention, the support sheet layer contains aluminum hydroxide is preferably flame-retardant.

 In addition, according to the present invention, the support sheet layer contains magnesium hydroxide is preferably flame-retardant.

According to the present invention, a conductive sheet layer including a conductive polymer is interposed between the support sheet layer and the pressure-sensitive adhesive layer, and the conductive polymer is preferably poly (3,4-ethylene dioxy thiophene).

In addition, according to the present invention, the conductive coating layer comprises a poly (3,4-ethylene dioxy thiophene), an acrylic-urethane copolymer binder, an aziridine crosslinking agent and water, through the gravure printing on the support sheet layer It is preferred to be coated.

Hereinafter, with reference to the accompanying drawings, it will be described in more detail with respect to the dust-proof wallpaper according to a preferred embodiment of the present invention.

 FIG. 2 is a schematic exploded perspective view of a dustproof wall paper according to a preferred embodiment of the present invention, FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2, and FIG. 4 is a chemical formula of a conductive polymer used in the dustproof wall paper shown in FIG. 2. It is a diagram showing.

2 to 4, the anti-vibration wallpaper 100 according to the preferred embodiment of the present invention includes a support sheet layer 10, an adhesive layer 20, a release paper layer 30, and a conductive coating layer 60. do.

The support sheet layer 10 is used as a base layer of the anti-vibration wallpaper 100, and includes polyvinyl chloride resin. The support sheet layer 10 is generally prepared by mixing a vinyl chloride resin, a dioctyl phthalate plasticizer, a stabilizer, etc. in a predetermined ratio to form a powder and then extruding it. The support sheet layer 10 forms the thickest layer in the entire wallpaper 100, and is preferably flame retardant in case of fire. The vinyl chloride resin contains chlorine (Cl) and is basically flame retardant. However, since a flame retardance is reduced in the overall support sheet layer by adding a plasticizer or a stabilizer, it is common to add a separate flame retardant. Bromine (Br) or phosphorus (P) is generally used as such a flame retardant, but bromine or phosphorus is harmful to the human body, so in the anti-vibration wallpaper 100 according to the present invention, aluminum hydroxide (Al (OH) ₃ ) and magnesium hydroxide (Mg). (OH) ₂ ) or a mixture of these materials is added as a flame retardant. Since the aluminum hydroxide and magnesium hydroxide are harmless to the human body and excellent in flame retardancy, there is an advantage that a large casualty can be avoided even in the event of a fire.

The pressure-sensitive adhesive layer 20 is laminated on the bottom surface of the support sheet layer 10. This adhesive layer 20 is for sticking the said support sheet layer 10 to the wall w. That is, the pressure-sensitive adhesive layer 20 is laminated on the lower surface of the support sheet layer 10, so that the pressure-sensitive adhesive layer 20 causes the support sheet layer 10 to be attached to the wall w, as well as maintenance, replacement, and the like. It can be easily separated from the wall (w) for maintenance. The pressure-sensitive adhesive layer 20 may be used by mixing an acrylic emulsion and a flame retardant as a known material. In addition, the pressure-sensitive adhesive layer 20 is preferably formed to be conductive.

On the lower surface of the pressure-sensitive adhesive layer 20, a release paper layer 30 is laminated. The release paper layer 30 is to prevent the pressure-sensitive adhesive layer 20 is exposed to the air to lose adhesiveness before attaching the support sheet layer 10 to the wall (w). Such a release paper layer 30 is also known as a known material and is generally produced by applying a silicone resin emulsion on one or both sides of kraft paper. When the support sheet layer 10 is attached to the wall w, the release paper layer 30 is separated from the pressure-sensitive adhesive layer 20 and then attached.

The printing layer 40 may be provided on the upper surface of the support sheet layer 10. That is, for example, a predetermined pattern or color such as a continuous triangular shape, a wavy pattern, or the like may be printed on the upper surface of the support sheet layer 10 to improve the aesthetics of the anti-vibration wallpaper 100. Various printing methods can be used for printing, and so-called gravure printing is used in this embodiment. Gravure printing is generally performed by using a roller having fine grooves, and the rollers pressurize the upper surface of the support sheet layer 10 in the present embodiment with the rollers filled with ink in the fine grooves. And when it is in contact with the cloud refers to a method in which the ink filled in the groove is printed on the support sheet layer (10).

In addition, a print protection layer 50 is stacked on the top surface of the print layer 40. The print protection layer 50 is to prevent the predetermined patterns formed on the print layer 40 from being erased or dirty. The print protection layer 50 is formed to be transparent so that the patterns can be seen from the upper surface of the print layer 40. do. The print protection layer 50 may be made of various materials, but in the present embodiment, is made of a material similar to the support sheet layer 10. That is, a vinyl chloride resin, a dioctyl phthalate plasticizer, a stabilizer, etc. may be blended in a predetermined ratio to form a powder, followed by extrusion.

The conductive coating layer 60 is laminated on the top surface of the support sheet layer 10 in more detail on the top surface of the print protection layer 50. The conductive coating layer 60 is made of a conductive polymer. The conductive polymer is intended to prevent the charged dust particles from adhering to the dustproof wall paper 100 by releasing a charged state by inducing discharge when the charged dust particles come into contact with the surface of the conductive coating layer 60.

Conventional wallpaper was not conductive, and thus, the wallpaper was charged by triboelectricity and the like, and electrostatic charges were accumulated. When the dust particles charged with negative charges in the state of accumulating static charges such as positive charges, the dust particles are attached to the wallpaper by electric force (coulomb force), but the dust particles are not easily removed. In the wallpaper 100, the discharge is performed when the charged dust particles come into contact with the conductive polymer, thereby solving the above problems.

As such a conductive polymer, poly (3,4-ethylene dioxythiophene) is used in a preferred embodiment of the present invention. The structural formula of such poly (3,4-ethylene dioxy thiophene) is shown in FIG. 4. The poly (3,4-ethylene dioxy thiophene) is a known compound and its preparation method is disclosed in the method disclosed in the patent application No. 2002-0083816 or the data cited in the patent application specification. It can be manufactured by a method or the like. The poly (3,4-ethylene dioxy thiophene) is conductive and releases charge when charged dust particles come into contact with the poly (3,4-ethylene deoxy thiophene).

On the other hand, the conductive coating layer 60 is prepared by including the poly (3,4-ethylene dioxy thiophene) and the acrylic-urethane copolymer binder, aziridine crosslinking agent, water and other additives as described above. The material of the conductive coating layer 60 having the composition described above is made of a liquid phase and is coated on the print protection layer 50 by the gravure printing. That is, when the roller is in contact with the print protection layer 50 while the liquid conductive coating layer 60 is filled in a plurality of grooves formed in the roller, the liquid materials are printed on the print protection layer 50. Is coated on.

For example, the surface resistance of the conductive coating layer 60 is preferably formed in the range of 10 ⁵ to 10 ¹⁰ Ω / Cm, which depends on the amount of the conductive polymer.

Examples of the composition of the conductive coating layer 60, for example, 10% poly (3,4-ethylene dioxy thiophene), 80% acrylic-urethane copolymer binder, 5% water, 2% aziridine crosslinker and 3% other additives It may be made of.

However, this composition is only one example and can be variously changed within the composition of the composition described above.

The surface resistance of the conductive coating layer 60 having the magnification may be varied in the range of 10 ⁵ to 10 ¹⁰ Ω / Cm as described above, and has thermal stability at about 350 ° C., water, hexane, and IPA (Iso Propyl Alcohol). ) Has chemical resistance with little resistance change, has a frictional voltage of less than 1V, and has a wear resistance with little resistance change after 500 times of friction.

Meanwhile, a conductive sheet layer 25 including a conductive polymer is interposed between the support sheet layer 10 and the pressure-sensitive adhesive layer 20, and the conductive polymer is the same as that used for the conductive coating layer 60. (3,4-ethylene dioxy thiophene). Since the conductive sheet layer 25 is interposed between the supporting sheet layer 100 and the pressure-sensitive adhesive layer 20, the conductive sheet layer 25 is discharged through the conductive sheet layer 25 when the wall surface to which the dustproof wallpaper 100 is attached is charged. .

The dustproof wall paper 100 according to the present invention having the above-described configuration has a thickness of about 0.18 mm to about 0.7 mm, specifically about 0.3 mm to 0.1 mm of the support sheet layer, and about 0.05 mm to about 0.05 mm of the print protection layer 50. It is about 0.3mm. The width of the anti-vibration wallpaper 100 is preferably made to be less than about 1220mm for ease of construction. The electrical characteristics of the anti-vibration wallpaper 100 will be briefly described. When the surface resistance of the anti-vibration wallpaper 100 is in the range of 10 ⁶ to 10 ⁷ Ω / Cm, a time (half-life) for charging a large voltage half-life, that is, a half time after charging the test piece in a corona discharge field and then half the voltage is halved. 0.1 seconds or less at 60% Kh, and 0.2 seconds or less at 61% Kh at 20 ° C when the surface resistance is in the range of 10 ⁹ to 10 ¹⁰ Ω / Cm.

The physical characteristics of the anti-vibration wallpaper 100 will be described.

100 mm2 specimens were attached to an aluminum plate and the gap gap was measured after 2 days at 65 ° C. As a result, the dimensional stability (shrinkage rate) of the anti-vibration wallpaper 100 was observed within 0.1 mm.

As a result of discoloration or fading after 300 hours of irradiation with a so-called xenon arc lamp weather resistance tester, no change was observed and thus, the weatherproof wall 100 was measured to have excellent weather resistance.

When the anti-vibration wallpaper 100 was attached to an aluminum plate and the bonding force was measured after 30 days at 60 ° C., there was no change compared to before measurement, and thus the anti-vibration wallpaper 100 had excellent heat resistance. In addition, the adhesion was measured after 30 days at 40 ℃, 90% relative humidity conditions by attaching the anti-vibration wallpaper 100 to the aluminum plate, but the same as before the measurement was evaluated as excellent moisture resistance. In addition, even after 15 days at -30 ℃ condition, the adhesive strength did not change it was excellent cold resistance.

On the other hand, coffee, cola, milk, vinegar, juice, ink and the like dropped on the surface after 24 hours to observe the surface staining, but no stain remained. That is, it was judged that the contamination resistance was excellent.

In addition, the test was performed more than 5000 times under the 1Kg load condition by using a so-called TABER abrasion tester, and there was no change on the surface, and cracks occurred on the surface of the dustproof wall paper 100 at high temperature molding on an adhesive such as plywood, MDF, and aluminum. Did not do it.

The chemical characteristics of the anti-vibration wallpaper 100 according to the preferred embodiment of the present invention will be briefly described.

Chemical resistance was measured. The dustproof wallpaper 100 was attached to an aluminum plate and precipitated in chemicals after 48 hours at room temperature, and the change in appearance was measured. As chemicals, benzene, petroleum, ethyl alcohol, 5% saline, methyl ethyl ketone (MEK), and xylene were measured, respectively. All of the above chemicals did not change in appearance and were determined to be excellent in chemical resistance.

Adhesiveness was measured. The dust-proof wallpaper 100 was cut to a width of 5 cm and attached to various surfaces to be bonded, and then subjected to a 180 degree peeling test under a condition of a tensile speed of 300 mm / min after 48 hours at room temperature. As the surface to be bonded, medium density fiberboard (MDF), acrylic, aluminum, gypsum board, larch plywood, pine plywood, stainless steel, asbestos slate, and melamine adhesive steel sheets were used.

In the case of the medium density fiberboard, the peeling resistance of 1Kg / 25.4mm was measured when the primer was not coated on the adhesive surface, and the peeling resistance of 1.9Kg / 25.4mm was measured when the primer was applied. In the case of acryl, the peel resistance of 2.9 Kg / 25.4 mm was measured when the primer was not applied, and the peel resistance of 305 Kg / 25.4 mm was measured when the primer was applied. In the case of aluminum, the peeling resistance of 2.5Kg / 25.4mm was measured when the primer was not applied, and the peeling resistance of 3.5Kg / 25.4mm was measured when the primer was applied. In the case of gypsum board, the peel resistance of 0.5 Kg / 25.4mm was measured when the primer was applied. In the case of bare king plywood, the peeling resistance of 1.8Kg / 25.4mm was measured when the primer was not applied, and the peeling resistance of 2.7 Kg / 25.4mm was measured when the primer was applied. In the case of pine plywood, the peeling resistance of 0.5Kg / 25.4mm was measured when the primer was not applied, and the peeling resistance of 3.5Kg / 25.4mm was measured when the primer was applied. In the case of stainless steel, peeling resistance of 2.7Kg / 25.4mm was measured when the primer was not applied, and peeling resistance of 3.5Kg / 25.4mm was measured when the primer was applied. In the case of asbestos slate, peeling resistance of 0.5Kg / 25.4mm was measured when the primer was not applied, and peeling resistance of 5.2Kg / 25.4mm was measured when the primer was applied. Finally, in the case of melamine adhesive steel sheet, the peel resistance of 3.2Kg / 25.4mm was measured when the primer was not applied, and the peel resistance of 5.2Kg / 25.4mm was measured when the primer was applied.

The anti-vibration wallpaper 100 according to the preferred embodiment of the present invention has the electrical, physical, and chemical properties as described above, and was evaluated as having excellent performance as a conductive wallpaper. Hereinafter, the construction of the anti-vibration wallpaper 100 will be briefly described. FIG. 5 is a schematic diagram for describing a state of use of the anti-vibration wallpaper shown in FIG. 2. When installing the anti-vibration wallpaper 100 to the wall (w), first peel off the release paper layer 30 of the anti-vibration wallpaper 100 from the pressure-sensitive adhesive layer 20 and then attach the anti-vibration wallpaper 100 to the wall (w) The construction is simply completed. Since the anti-vibration wallpaper 100 is flexible, even when there is a curved surface f of the walls w, the anti-vibration wallpaper 100 is smoothly bent along the curved surface f, so construction is easy. When the dustproof wallpaper 100 constructed in the Klimum room or the like comes into contact with the dustproof wallpaper 100 while the charged dust particles are suspended, the poly (3,4-ethylene is a conductive polymer contained in the dustproof wallpaper 100. Deoxythiophene). Accordingly, the phenomenon that the dust particles charged in the clean room in which the conventional wallpaper is used is not attached to the wallpaper by the electric force and are not easily removed. Accordingly, since the dust particles that are not attached to the wall can be discharged to the outside through the ventilation system installed in the clean room, the particle management in the clean room, etc. is very easy.

In addition, by using aluminum hydroxide or magnesium hydroxide as a flame retardant, it does not contain bromine or phosphorus harmful to the human body, there is an advantage that it is environmentally friendly because it does not emit so-called environmental hormones.

 On the other hand, during the use of the anti-vibration wallpaper 100, some of the anti-vibration wallpaper may be damaged and may require replacement. Even in this case, since the dust-proof wallpaper 100 is attached to the wall w and is easy to separate, there is an advantage that the maintenance of the clean room wallpaper is simplified.

The printing layer 40 and the print protection layer 50 are laminated and illustrated on the dustproof wallpaper 100 so far, but the present invention is not limited thereto, and the print layer 40 and the print protection layer 50 are not limited thereto. You can also remove

An embodiment of this type is shown in FIG. 6. 6 is a schematic view for explaining the anti-vibration wallpaper according to another embodiment of the present invention. Referring to FIG. 6, the conductive coating layer 60 is directly laminated on the upper surface of the support sheet layer 10. Since the printing layer 40 and the print protection layer 50 mainly function to improve the aesthetics of the anti-vibration wallpaper 100, the dust charged in the present embodiment with the print layer 40 and the print protection layer 50 removed. It does not cause any trouble in releasing the charge of the particles to prevent the dust particles from adhering to the wallpaper, and the same effect as in the above embodiment occurs.

As described above, the anti-vibration wallpaper according to the present invention discharges the charged dust particles, thereby not only reducing the damage of the product due to the static electricity of the charged dust particles, but also reducing the risk of dust particles being attached to the product. The advantage is that it can be removed.

In addition, since the anti-vibration wallpaper according to the present invention is a flexible form, it is easy to install on a curved surface and the like, and there is an advantage of easy maintenance and management.

In addition, in one embodiment of the present invention is excellent in flame retardancy, there is an advantage that it is environmentally friendly by not using bromine or phosphorus as a flame retardant.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims (8)

In the dust-proof wallpaper to prevent the adhered dust particles, A support sheet layer comprising vinyl chloride resin; An adhesive layer laminated on a lower surface of the support sheet layer to adhere the support sheet layer to a wall; A release paper layer detachably attached to a lower surface of the pressure-sensitive adhesive layer to protect the pressure-sensitive adhesive layer; And A conductive coating layer laminated on an upper surface of the support sheet layer, the conductive coating layer including a conductive polymer to prevent the charged dust particles from adhering to the surface thereof by discharging the charged dust particles; The support sheet layer comprises aluminum hydroxide or magnesium hydroxide dustproof wall paper, characterized in that the flame-retardant treatment. The method of claim 1, The conductive polymer of the conductive coating layer is a dust-proof wallpaper, characterized in that the poly (3,4-ethylene dioxy thiophene). The method of claim 1, In order to improve aesthetics, a dustproof wallpaper is further provided with a printing layer on which a predetermined pattern is printed between the support sheet layer and the conductive coating layer. The method of claim 3, To protect the pattern formed on the printed layer, a dustproof wall paper further comprises a print protective layer comprising vinyl chloride between the print layer and the conductive coating layer. delete delete The method of claim 1, A conductive sheet layer including a conductive polymer is interposed between the support sheet layer and the pressure-sensitive adhesive layer, wherein the conductive polymer is poly (3,4-ethylene dioxy thiophene). The method of claim 2, The conductive coating layer comprises a poly (3,4-ethylene dioxy thiophene), an acrylic-urethane copolymer polymerization binder, aziridine crosslinking agent and water, characterized in that the coating on the support sheet layer through gravure printing Dustproof wallpaper.

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