JPH06220408A - Adhesive tape or sheet with antistatic effect - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an adhesive tape or sheet having an antistatic effect which is industrially useful, but in particular it is difficult to use the conventional adhesive tape or sheet for surface protection. And a dustproof mat formed by laminating adhesive tapes or sheets. [Structure] A sticky tape obtained by applying a conductive paint containing a conductive whisker on one side of a support to form a conductive anchor coat layer in advance, and further applying a pressure sensitive adhesive or an adhesive on the surface thereof. Alternatively, a dustproof mat having an antistatic effect obtained by laminating a sheet and this adhesive tape or sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrially very useful adhesive tape or sheet having an antistatic effect, and particularly to an adhesive tape or sheet for surface protection having an antistatic effect on various adherends, and The present invention relates to a dustproof mat having an antistatic effect obtained by laminating an adhesive tape or sheet having an antistatic effect.

[0002]

2. Description of the Related Art An adhesive tape or sheet for surface protection is attached to the surface of various adherends for the purpose of preventing scratches during processing and transportation, but at least the surface of the adherend easily generates static electricity. In the case of sheet-like or board-like processing materials and their processed products that are electrical insulators, static electricity is generated on the surface of the adherend when the surface protection adhesive tape or sheet is peeled from the adherend, However, there is a problem that dust and the like are sucked and contaminated, and it has been a major problem to impart an antistatic effect to the surface protection adhesive tape or sheet.

As for the dustproof mat obtained by laminating adhesive tapes or sheets, static electricity is generated on the adhesive tapes or sheets when the laminated tapes or sheets are peeled off one by one, and the electronic material manufacturing plant and research facilities, biochemicals, etc. There is a problem that it is difficult to use it in a clean room such as a research facility or a computer room where electronic equipment is installed, a medical management room, etc. A major issue has been to reduce static electricity generated during peeling as much as possible.

For the purpose of solving these problems, various antistatic pressure-sensitive adhesive tapes or sheets have been conventionally proposed. An antistatic pressure-sensitive adhesive tape or sheet having an antistatic layer coated with an antistatic paint on the back surface of the support. An antistatic pressure-sensitive adhesive tape or sheet obtained by kneading a surfactant, carbon powder, metal powder and the like into the support itself (Japanese Utility Model Publication No. 38-10079). An antistatic pressure-sensitive adhesive tape or sheet obtained by kneading a surfactant, carbon powder, metal powder or the like into the pressure-sensitive adhesive itself (Japanese Patent Laid-Open No. 59-80482, Japanese Patent Laid-Open No. 59-223778).
Issue). An antistatic pressure-sensitive adhesive tape or sheet having an antistatic layer provided between the support and the pressure-sensitive adhesive layer (JP-A-61-22727).
No. 9). An antistatic layer in which an antistatic layer is formed in an intermediate layer sandwiched between a support and an adhesive layer, and a primer layer is provided at least between the support and the antistatic layer or between the adhesive layer and the antistatic layer. Adhesive tape or sheet (JP-A-63-3)
No. 80), or an antistatic pressure-sensitive adhesive tape or sheet with an intermediate support interposed (JP-A-63-12681). An antistatic pressure-sensitive adhesive tape or sheet having an antistatic layer formed between a support and a back surface treating agent layer (JP-A-4-1753).
91 publication).

However, the above-mentioned proposed antistatic pressure-sensitive adhesive tapes or sheets have various drawbacks. The method (1) has the drawbacks that the antistatic layer is easily scratched and is easily peeled off by friction. The method described above has drawbacks such as reduction in strength of the support and deterioration of surface properties because the antistatic material is kneaded into the support itself. When the kneaded material is a surfactant, there are drawbacks such as a decrease in adhesive strength due to bleeding of the surfactant, deterioration of antistatic performance over time, and contamination of the adherend.When the kneaded material is carbon powder, the support is There are cases where it is not preferable depending on the application such as becoming black and opaque, and there are drawbacks such as migration of carbon powder, reduction of adhesive strength due to falling off, deterioration of antistatic performance over time, and contamination of adherends. When the material to be kneaded is a metal powder, the transparency of the support is lowered due to the sharp reflection peculiar to the metal, and there are drawbacks such as deterioration of antistatic performance over time due to oxidation of the metal. The method (1) has a drawback that the adhesive strength is lowered because the antistatic material is kneaded into the pressure sensitive adhesive itself, and also has the drawback that the antistatic performance is deteriorated with time and the adherend is contaminated as in the method (2). Is an improved invention (JP-A-63-380).
As pointed out in, there is a problem with the adhesion between the antistatic layer and the support or adhesive layer, and the antistatic performance due to environmental changes such as humidity due to the use of an ionic conductive polymer as the antistatic material. There are drawbacks such as fluctuations in The method of is a method of providing a primer layer between the support and the antistatic layer or at least one of the adhesive layer and the antistatic layer for the purpose of improving the adhesion between the antistatic layer and the support or the adhesive layer in the method of However, the fundamental drawback of fluctuations in antistatic performance due to environmental changes such as humidity has not been solved, and there are drawbacks that the process is complicated and the manufacturing is complicated and the cost is high. Although the method is an improvement invention of the method, it is difficult to fundamentally solve the problems such as the scratch resistance of the antistatic layer or the back surface treatment layer and the ease of peeling due to friction as already pointed out. There is a drawback of.

[0006]

An object of the present invention is to solve these problems and provide an industrially useful pressure-sensitive adhesive tape or sheet having an antistatic effect. Particularly, the conventional pressure-sensitive adhesive tape or sheet is used. Another object of the present invention is to provide an adhesive tape or sheet for surface protection and a dustproof mat formed by laminating the adhesive tape or sheet.

[0007]

According to the present invention, a conductive coating material containing a conductive whisker is applied to one surface of a support to form a conductive anchor coat layer in advance, and a pressure sensitive adhesive or adhesive is further applied to the surface. The present invention relates to a pressure-sensitive adhesive tape or sheet formed by applying an agent, and a dust-proof mat having an antistatic effect obtained by laminating the pressure-sensitive adhesive tape or sheet.

FIG. 1 is a sectional view of the pressure-sensitive adhesive tape or sheet of the present invention, FIG. 2 is a schematic view of a roll of the pressure-sensitive adhesive tape or sheet, and FIG. 3 is a dust-proof obtained by laminating the pressure-sensitive adhesive tape or sheet. A sectional view of the mat is shown.
In the figure, 1 is an adhesive layer (adhesive layer), 2 is a conductive anchor coat layer, and 3 is a support.

In the present invention, the electrically conductive whiskers are electrically insulating whiskers, that is, alkali metal titanate whiskers,
Titanium oxide whiskers, aluminum borate whiskers,
A conductive whisker formed by forming a carbon film, a conductive metal oxide film and / or a metal film on the surface of magnesium pyroborate whiskers, or an alkali metal titanate whisker is heated in the presence of a reducing agent in a non-oxidizing atmosphere. At least one selected from the group consisting of conductive alkali metal titanate whiskers obtained by extracting oxygen from the structure of the alkali metal titanate whiskers, zinc oxide whiskers having conductivity themselves, titanium nitride whiskers and the like is used. can do.

The above-mentioned conductive whiskers have various excellent features, but when used as a material for a conductive coating material which forms a conductive anchor coat layer in an adhesive tape or sheet having an antistatic effect of the present invention. The following characteristics are exhibited. Since the conductive performance is stable against temperature and humidity, and it has excellent oxidation resistance and reduction resistance, the antistatic performance does not change even under any environmental changes, and a stable antistatic effect is exhibited for a long period of time. Since it has a whisker shape, a desired resistance value can be obtained with a relatively small amount and the influence on the binder in the conductive paint is small. Therefore, the support of the conductive anchor coat layer formed by applying the conductive paint. And does not affect the adhesion with the adhesive or the adhesive. Since it is a whisker shape, there is almost no migration, and there is no deterioration in the adhesiveness or adhesiveness of the pressure-sensitive adhesive or the adhesive and no stain on the adherend. Since it has an extremely fine shape, it is possible to form an anchor coat layer having an extremely thin conductive property, which is economically advantageous. In addition, if a transparent support and an adhesive or an adhesive is used, it is a semitransparent adhesive. Tapes or sheets can be provided. A conductive anchor coat layer with excellent surface smoothness can be obtained due to its extremely fine shape, and the surface of the adhesive layer or adhesive layer formed by coating on that surface can be finished smoothly, so that the effective area for adhesion or adhesion is widened. it can. If a white conductive whisker formed with a conductive metal oxide film is used, coloring is possible and colorization is possible. If a conductive whisker formed with a metal film is adopted, it can be applied as an electromagnetic wave shield and as an electrode for removing static electricity.

Among the supports in the present invention, the sheet material of the thermoplastic or thermosetting resin is polystyrene,
Polyvinyl chloride, polyvinylidene chloride, polyester,
Examples thereof include sheet-like substances such as polypropylene, polyethylene, polyamide, polycarbonate, polyimide, fiber-based plastic, polyurethane-based resin, silicon-based resin, and fluorine-based resin, which may be used alone or in a laminated form. The sheet material in the present invention includes both those classified as a film having a thickness of less than 0.254 mm and those classified as a sheet having a thickness of 0.254 mm or more in the case of a soft plastics, and in the case of a hard plastics. Both those classified as films having a thickness of less than 0.076 mm and those classified as sheets having a thickness of 0.076 mm or more are included. Among the supports in the present invention, the paper is a general one made of plant fibers, wood pulp, synthetic fibers, etc., and if necessary laminated with plastics film etc. and subjected to moistureproof treatment etc. There is no problem even if it is something. Of the supports in the present invention, the woven and non-woven fabrics are general ones made of natural fibers, synthetic fibers and the like, and there is no problem even if they are subjected to moistureproof treatment or the like as necessary.

The conductive whiskers in the present invention include (1) JP-A-63-12759 and JP-A-61-
No. 55218, that is, non-oxidizing after introducing the fibrous component from the vaporization chamber so that the fibrous component is constantly supplied to the heating and firing furnace so that the hydrocarbon component becomes 10 to 100 parts by weight with respect to 100 parts by weight of the fibrous component. Obtained by using electrically insulating whiskers, namely alkali metal titanate whiskers, titanium oxide whiskers, aluminum borate whiskers, or magnesium pyroborate whiskers as a fibrous component among the highly conductive fibers obtained by firing at 800 to 1100 ° C in an atmosphere. Highly conductive whiskers, (2) the method disclosed in Japanese Patent Publication No. 62-4328, that is, (a) a group of compounds of tin, indium, antimony, copper and nickel in an aqueous dispersion of an alkali metal titanate. At the same time, a solution of a compound consisting of one or more compounds selected from the group consisting of (b) an aqueous solution of an alkali hydroxide or an alkali halide is simultaneously prepared. Instead of the conductive alkali metal titanate whiskers and the alkali metal titanate whiskers obtained by depositing a water-insoluble component produced by the reaction of the solution (a) and the solution (b) on the surface of the alkali metal titanate salt. Conductive whiskers obtained by the same method using titanium oxide whiskers, aluminum borate whiskers or magnesium pyroborate whiskers,
(3) The method disclosed in Japanese Examined Patent Publication No. 21092
That is, Pt, Au, R on the surface of alkali metal titanate whiskers
Conductive alkali metal titanate whiskers having an adhesion layer of at least one metal selected from the group consisting of u, Rh, Pd, Ni, Co, Cu, Sn and Ag, and instead of the alkali metal titanate whiskers Conductive whiskers obtained by the same method using titanium oxide whiskers, aluminum borate whiskers or magnesium pyroborate whiskers, (4) the method disclosed in Japanese Patent Publication No. 62-3767, that is, the general formula M ₂ O (TiO _2). ) N (in the formula, M is an alkali metal, n is an integer of 2 to 12), a mixture of an alkali metal titanate and a carbon material is heated in a reducing or inert atmosphere and heated at 500 to 1300 ° C. Reduced alkali metal titanate whisker obtained by
(5) A method disclosed in Japanese Patent Publication No. 62-40291, that is, a mixture of titanium oxide, an alkali metal carbonate and a carbon material is reduced or heated under an inert atmosphere,
Examples thereof include reduced alkali metal titanate whiskers obtained by heating and firing at 500 to 1300 ° C., or (6) electrically conductive whiskers such as zinc oxide whiskers, titanium nitride whiskers, etc. which themselves have conductivity.

Further, in the present invention, the conductivity imparted with conductivity by forming another conductive filler such as a carbon film, a conductive metal oxide film or a metal film in a range that does not deteriorate the appearance, physical properties and the like. Fillers, carbon fibers, metal fibers, carbon black, graphite carbon metal fibers, metal powders, etc. may be mixed, and other inorganic fillers, titanium oxide, glass fibers, etc. may be mixed and used without any problem.

The conductive paint in the present invention is (1)
The method disclosed in JP-B-4-37522, that is, a conductive alkali metal titanate whisker and a thermosetting resin,
From thermoplastic resins, hydrocarbon compounds or their derivatives, polycondensates of fatty acids and fatty acids and polyhydric alcohols, alkylene oxide homopolymers or copolymers, natural resins and their derivatives, inorganic binders and metal-containing organic compounds A conductive paint obtained as a composition comprising at least one binder selected from the group consisting of the following, and more specific examples are (2) Japanese Patent Application No. 1-149207. EVA latex, acrylic latex,
Latex such as SB latex, cyclized rubber, PV
A, chlorinated olefins, fibrin derivatives, starch derivatives, acrylic resins, EVA resins, polyvinyl chloride resins, polyvinyl acetate resins, styrene resins, epoxy resins, urethane resins, phenol resins At least one selected from the group consisting of resins, etc. which are dissolved in a solvent such as resin, polyester resin, polyamide resin, etc.
An example is a conductive coating material obtained by mixing and dispersing conductive alkali metal titanate whiskers in the binder with one or more kinds of binders. Further, if necessary, various dispersants, leveling agents, anti-settling agents and the like may be added to the conductive paint without any problem.

The blending ratio of the conductive whisker and the binder in the conductive coating is such that the surface resistance value of the conductive anchor coat layer formed by coating the support with the conductive coating is from 10 ^-2 to It should be selected together with the type of conductive whisker so that it becomes 10 ⁹ Ω / □, and the coating amount of the conductive coating is 0.1 to 10% of the non-volatile content of the conductive coating.
It can be selected in the range of g / m ² according to the required characteristics. The conductive whisker and the binder are appropriately mixed so that the conductive whisker in the non-volatile matter contained in the conductive paint is 10 to 60% by weight, and 10% by weight.
If it is less than 60% by weight, it is difficult to develop conductivity, and if it exceeds 60% by weight, the amount of the binder compounded becomes small and the adhesion between the anchor coat layer and the support is adversely affected. Since it is used in a large amount, it is not preferable in terms of cost. Further, when the coating amount of the conductive coating material is less than 0.1 g / m ^{2 of the} nonvolatile content contained in the conductive coating material, it is difficult to obtain a conductive anchor coat layer having a stable surface resistance value, and when it exceeds 10 g / m ^2. Even if the coating amount of the conductive coating material is increased, no significant difference is observed in the surface resistance value of the conductive anchor coat layer, which is not preferable in terms of cost only.

The method of applying the conductive paint to a support to form a conductive anchor coat layer includes an air knife coater system, a gravure coat system, a roll coat system,
Although various methods such as a flow coating method and a spray coating method can be selected, the gravure printing method is preferable in view of economical efficiency. The conductive anchor coat layer for coating and forming the conductive coating material on the support may be formed on the entire surface of the support so as to have a substantially uniform thickness, but may be designed by pattern printing if desired. Further, the surface of the support may be subjected to corona discharge treatment in order to improve the wettability with the support and improve the adhesion when the conductive coating is applied to the support. A primer layer may be provided between the conductive anchor coat layer to be formed by coating and the support.

The pressure-sensitive adhesive or adhesive used for the pressure-sensitive adhesive layer or adhesive layer formed by coating on the surface of the conductive anchor coat layer is EVA latex, acrylic latex, S
Latex such as B latex, cyclized rubber, PVA,
Chlorinated olefins, fibrin derivatives, acrylic resins, EVA resins, polyvinyl chloride resins, polyvinyl acetate resins, styrene resins, epoxy resins, phenol resins, polyester resins, polyamide resins, etc. However, the adhesive or the adhesive is not limited to these.

When the pressure-sensitive adhesive tape or sheet having an antistatic effect of the present invention is used as a surface-protective pressure-sensitive adhesive tape or sheet for various adherends, an adherend that can be used very usefully is at least the surface of the adherend is electrostatic. Sheet-like or board-like processing materials that are electrical insulators that easily generate heat and processed products thereof, such as polycarbonate-based resin, acrylic-based resin, polyester-based resin, polyvinyl chloride-based resin, ABS-based resin,
Synthetic resin sheet-like or board-like processing materials such as epoxy resins, phenolic resins, fluorine-based resins and their processed products, decorative furniture materials coated with general furniture paints and their processed products , Melamine veneer, D
Examples include resin-impregnated decorative plates such as AP decorative plates and polyester decorative plates, and processed products thereof, coated steel plates coated with a general paint or an inorganic coating material and processed products thereof, or ceramic products. It is not limited to.

[0019]

EXAMPLES Next, the present invention will be specifically described with reference to examples. The powder resistance values of typical conductive whiskers used in the examples of the present invention are as follows. (1) Conductive potassium titanate whiskers "Dentor WK
200B "powder resistance value: 6 × 10 ^-1 Ω [tin oxide coated white potassium titanate whiskers manufactured by Otsuka Chemical Co., Ltd.] (2) conductive potassium titanate whiskers" Dentor BK "
300 "powder resistance: 4 × 10 ^-2 Ω [Otsuka Chemical Co., Ltd.]
Carbon-Coated Conductive Potassium Titanate Whiskers] (3) Conductive Potassium Titanate Whiskers "Superdentol SD-100" Powder Resistance Value: 1 x 10 ^-3 Ω or less [manufactured by Otsuka Chemical Co., Ltd. silver-coated conductive titanic acid] Potassium whisker] (4) Conductive titanium oxide whisker "FT-1000"
Powder resistance value: 9 × 10 ^-1 Ω [Ishihara Sangyo Co., Ltd. tin oxide coated conductive titanium oxide whisker] (5) Zinc oxide whisker "Panatetra" Powder resistance value:
2 × 10 ⁸ Ω [Matsushita Amtec Co., Ltd. zinc oxide whiskers]

Example 1 20% by weight of chlorinated polyethylene resin, 12% by weight of conductive potassium titanate whisker "Dentol WK200B",
A conductive paint was prepared in which the solvent was toluene. The nonvolatile content of this conductive paint (No. 1) was 32.2% by weight, and 37.3% of the nonvolatile content was conductive potassium titanate whiskers.

Example 2 8% by weight of ethylene ethyl acrylate resin, 5% by weight of phenol resin, 4% by weight of conductive potassium titanate whisker "Dentol BK300", 0.5% by weight of KETCHEN BLACK (manufactured by Lion Akzo), Aerosil 0 .
A conductive paint containing 4% by weight and a solvent of toluene was prepared. The conductive coating material (No. 2) had a nonvolatile content of 18.0% by weight, a conductive material content of the nonvolatile content of 25.0% by weight, and a nonvolatile content of 22.2% was a conductive potassium titanate whisker.

Example 3 8% by weight of chlorinated polyethylene resin, 8% by weight of cyclized rubber, 6% by weight of xylene resin, 12% by weight of conductive potassium titanate whisker "Superdentol SD-100", and solvent of toluene and ethyl acetate. A conductive paint, which is a mixed solvent with a mixing ratio (weight ratio) of 65:35, was prepared. The nonvolatile content of this conductive paint (No. 3) is 34.2% by weight, and 35.0% of the nonvolatile content is conductive potassium titanate whiskers.

Example 4 100 parts by weight of epoxy resin, 21.5 parts by weight of N- (2-aminoethyl) piperazine, conductive titanium oxide whisker "F"
A conductive coating material was prepared by dispersing 99.4 parts by weight of the compound "T-1000" on a three-roll mill. This conductive paint (No.4)
45.0% of the non-volatile content of this is conductive titanium oxide whiskers.

Example 5 A mixture of 100 parts by weight of urethane resin, 50 parts by weight of ethyl cellosolve, and 150 parts by weight of zinc oxide whisker "Panatetra" was dispersed with a high-speed disper to prepare a conductive paint.
Zinc oxide whiskers account for 60.0% of the non-volatile content of this conductive paint (No. 5).

Example 6 A conductive anchor coating layer was formed by conducting gravure printing on the surface of a polyethylene film having a thickness of 50 μm using the conductive coating materials Nos. 1 to 5. Table 1 shows the measurement results of the relationship between the non-volatile content of the conductive paint in the conductive anchor coat layer and the surface resistance value. The surface resistance was measured according to the NFPA (American Fire Protection Association) method. That is, as shown in Fig. 4, 5 pounds (about 2.5k
The electrodes of g) were placed at intervals of 3 feet (about 90 cm) and measured with an insulation meter.

[0026]

[Table 1]

Example 7 A conductive anchor coat layer was formed by performing gravure printing on the surface of a polyethylene film having a thickness of 50 μm using conductive paint Nos. 1 to 5, and an acrylic adhesive (diluted with an ethyl acetate solvent) was formed on the surface. ) Table 2 shows the measurement results of the surface resistance of the pressure-sensitive adhesive sheet obtained by applying the solution by the bottom feed reverse method and then drying it. The surface resistance was measured according to the NFPA method as in Example 6.

[0028]

[Table 2]

Example 8 A pressure-sensitive adhesive mat was prepared by laminating 30 sheets using the pressure-sensitive adhesive sheet having the coating material No. 1 in Example 7, the nonvolatile content of the anchor coat layer of 3.0 g / m ² and the adhesive coating amount of 5.0 g / m ² . . Next, the laminated pressure-sensitive adhesive sheets were peeled off one by one every several days, and the surface resistance value and the charge decay time were measured. The results are shown in Table 3.
The surface resistance value was measured according to the NFPA method as in Example 6, and the charge decay time was measured by STA manufactured by ETS in the United States.
+5,000 using TICDECAY METER-406C
The time until 100% attenuation was measured by applying V and -5000V. Further, when the same measurement was performed on the conventional laminated adhesive mat, + 2000V and -1600V were retained and 100% attenuation was not observed.

[0030]

[Table 3]

Example 9 The laminated adhesive mat of the present invention prepared in Example 8 was used as 600 × 900.
Cut out to a size of mm, leave for 2 hours at each temperature and humidity condition, walk on each laminated adhesive mat 20 times with rubber sole shoes, and immediately peel off the top adhesive sheet for 1-2 seconds. The sheet was peeled off over time, and the amount of electrostatic charge on the peeled sheet was measured using a static electricity measuring instrument, Statileon. A conventional laminated adhesive mat was also measured in the same manner as a comparative example. The measurement results are shown in Table 4. The static electricity measuring instrument STATILON is a STATIRON-MSTATIC, V. ME
TER was used.

[0032]

[Table 4]

Example 10 A non-charged acrylic plate was prepared by using a pressure-sensitive adhesive sheet having a paint No. 1 of Example 7, a nonvolatile content of anchor coat layer of 3.0 g / m ² and an adhesive coating amount of 5.0 g / m ^{2 as} an adhesive sheet for surface protection. (Thickness 2
mm) and left in a constant temperature and humidity room at a temperature of 20 ° C and a relative humidity of 65% for 1 to 60 days, then the surface protection adhesive sheet was peeled off from the acrylic plate, and the amount of static electricity and ash on the peeled acrylic plate surface The height was measured. The results are shown in Table 5. For the measurement of the amount of static electricity on the surface of the acrylic plate, the static electricity measuring instrument Statileon was used as in Example 9. Ash adhesion height is 20 ℃, relative humidity
When the ash of cigarette was spread evenly on the glass plate in a constant temperature and humidity room of 65% and the charged sample was held on the glass plate and gradually approached to the glass plate, the height at which the ash adhered to the sample was measured for the first time. The measurement was taken as the ash adhesion height of the sample. Regarding the re-peeling performance, the criteria were set as follows, and good or bad was determined. * Good judgment criteria: Peeling can be done smoothly with no adhesive residue or cloudy surface. Defective: There are defects as a protective material such as adhesive residue, clouding of the plate surface, and difficult peeling.

[0034]

[Table 5]

[0035]

INDUSTRIAL APPLICABILITY The pressure-sensitive adhesive tape or sheet having an antistatic effect of the present invention can exhibit an antistatic effect with a small addition amount by using a conductive whisker as a conductive material. Adhesiveness with is good, and the antistatic effect does not fluctuate due to environmental changes such as temperature and humidity, and it exhibits a stable antistatic effect over a long period of time. As a pressure-sensitive adhesive tape or sheet having an antistatic effect industrially useful because it has no migration property and has no stickyness or adhesiveness of the pressure-sensitive adhesive or adhesive and no stain to the adherend. It is preferably used.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an adhesive tape or sheet of the present invention.

FIG. 2 is a schematic view of an adhesive tape or sheet of the present invention, which is a roll-up roll.

FIG. 3 is a cross-sectional view of a dustproof mat obtained by laminating the adhesive tape or sheet of the present invention.

FIG. 4 is a schematic view of a device for measuring a surface resistance value.

[Explanation of symbols]

 1 Adhesive Layer (Adhesive Layer) 2 Conductive Anchor Coat Layer 3 Support 4 Sample 5 Electrode 6 Insulator

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masanori Morino 1-2-7 Hannan-cho, Abeno-ku, Osaka-shi, Osaka Haseyu Showacho Building Daio Paper Co., Ltd. (72) Inventor Kazuto Uemura Tokushima, Tokushima Prefecture 463 Kagasuno, Ichikawauchi-machi Otsuka Chemical Co., Ltd., Tokushima Research Institute (72) Inventor Masayoshi Suzue 463, Kawauchi-machi, Tokushima-shi, Tokushima Prefecture Otsuka Chemical Co., Ltd., Tokushima Research Institute

Claims (11)

[Claims] 1. A conductive coating material containing a conductive whisker is applied to one surface of a support to form a conductive anchor coat layer in advance, and a pressure-sensitive adhesive or adhesive is applied to the surface of the support. Adhesive tape or sheet. 2. The adhesive according to claim 1, wherein the support is a sheet-like substance having a thickness of 10 to 500 μm, which is at least one selected from the group consisting of thermosetting or thermoplastic resin, paper, woven fabric and non-woven fabric. Tape or sheet. 3. The pressure-sensitive adhesive tape or sheet according to claim 1, wherein the conductive paint is a conductive paint in which a conductive whisker is blended in an amount of 10 to 60% by weight in a nonvolatile content contained in the conductive paint. 4. A conductive anchor coat layer comprising a conductive non-volatile content of 0.1 to 10 g / m ² applied to form a conductive anchor coat layer having a surface resistance value of 10 ⁻² to 10 ⁹ Ω / □. The pressure-sensitive adhesive tape or sheet according to claim 1, which has a conductive anchor coat layer that is 5. An adhesive or an adhesive has adhesiveness or adhesiveness to the conductive anchor coat layer, and the adhesive layer or adhesive layer formed by coating on the surface of the conductive anchor coat layer is applied to an adherend. A tacky agent or adhesive having tackiness or adhesiveness, wherein the tacky agent or adhesive is 0.
The pressure-sensitive adhesive tape or sheet according to claim 1, which has a pressure-sensitive adhesive layer or an adhesive layer formed by coating and forming 5 to 30 g / m ² . 6. The adhesive tape or sheet according to claim 1, wherein the conductive whisker is a conductive whisker formed by forming a carbon film, a conductive metal oxide film and / or a metal film on the surface of an electrically insulating whisker. 7. The adhesive tape or sheet according to claim 6, wherein the electrically insulating whiskers are alkali metal titanate whiskers, titanium oxide whiskers, aluminum borate whiskers and magnesium pyroborate whiskers. 8. A conductive alkali metal titanate whisker obtained by heating a conductive alkali metal titanate whisker in a non-oxidizing atmosphere in the presence of a reducing agent to remove oxygen in the structure of the alkali metal titanate whisker. The pressure-sensitive adhesive tape or sheet according to claim 1, wherein 9. The pressure-sensitive adhesive tape or sheet according to claim 1, wherein the conductive whiskers are zinc oxide whiskers and / or titanium nitride whiskers. 10. The conductive paint as a binder as claimed in claim 6 or 8.
10. A conductive paint comprising at least one selected from the group consisting of the conductive whiskers described in 9 above.
Adhesive tape or sheet. 11. A dustproof mat having an antistatic effect obtained by laminating the adhesive tape or sheet according to claim 1.