JPH10279890A - Antistaic tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antistatic tape which can effectively prevent the occurrence of static electricity or eliminate static electricity without fail regardless of the conditions under which it is used, though it is extremely simple and is made without kneading or applying an antistatic agent. SOLUTION: This antistatic tape has a constitution wherein one to several continuous thin conductive wires (2) are fixed along the length direction of a tape (2) with an arbitrary width. The tape (1) has an adhesive layer (1a). This antistatic tape may have such a constitution that the thin wires (2) are stuck to the adhesive layer (1a); that the adhesive layer (1a) and the wires (2) stuck thereto are covered with a release sheet; or that the wires (2) are sandwiched and fixed between two tapes (1), (1) adhered to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antistatic tape (including a wide-width tape) capable of preventing generation of static electricity or removing static electricity.

[0002]

2. Description of the Related Art A tape (including a film) made of plastics or cloth may be a self-adhesive tape, in the form of a single tape or in a state in which an adhesive layer or another resin layer is laminated.
Widely used in industrial and consumer fields, including adhesive tape, double-sided adhesive tape, packing / bundling tape, electrical insulating tape, covering tape, photosensitive resin base film, optical film, agricultural film, etc. Have been.

[0003] These tapes are generally easily charged by static electricity, and may cause troubles such as adsorption of dust, clinging to a human body, electrostatic shock, and electrostatic destruction during handling or storage. Therefore, there is a demand for the development of a tape having an antistatic property so that the tape itself does not carry static electricity or an object to which the tape is applied does not cause electrostatic damage.

[0004] A typical method for obtaining a tape having antistatic properties is (a) a kneading method, that is, a method for producing a tape from a raw material into which an antistatic agent has been kneaded (when the tape is an adhesive layer or other adhesive). When having a resin layer, kneading may be performed on the tape base material side or may be performed on the adhesive layer or other resin layer side), (b) coating method, that is, containing an antistatic agent A method of applying a treatment liquid consisting of a solution or a dispersion to a tape (when the tape has an adhesive layer or another resin layer, the coating may be performed on the tape base material side, and the adhesive layer or other resin layer may be applied. Side). Here, as the antistatic agent, a surfactant type, a general antistatic agent such as a hydrophilic polymer is used, but a carbon type, a metal type,
A conductive agent such as a metal oxide may be used as an antistatic agent.

[0005]

However, the kneading method (a) cannot be adopted unless mass production is required, since conditions must be selected each time during production.
Furthermore, if the antistatic agent is kneaded enough to exhibit a sufficient antistatic effect, the physical and chemical properties of the base tape or the adhesive layer (or other resin layer) may change. is there. When the antistatic agent is carbon black, only a black one is obtained, transparency is impaired, and when the antistatic agent is a surfactant system, the antistatic property tends to be impaired over time, and It is difficult to obtain a sufficient antistatic effect under humidity conditions, and even with a hydrophilic polymer, it is difficult to obtain a sufficient antistatic effect under low humidity conditions.

[0006] The coating method (b) has the same problems as those in the kneading method. Also, in the case of a tape with an adhesive layer or another resin layer, when the treatment liquid is applied to the tape substrate side, the tape is usually wound in a roll shape. Layer or other resin layer side,
Again, it often has an adverse effect on the adhesive strength and the like.

[0007] In addition, in any of the above methods (a) and (b), for example, in the case of a tape with an adhesive layer, variations in adhesiveness are avoided not only between lots but also within the same lot. However, there is a problem that it is difficult to obtain a product of uniform quality.

Further, the tape is a self-adhesive tape having a self-adhesive layer, that is, a layer of an adhesive which is adhered when the self-adhesive layer forming surfaces are non-thermocompression bonded to each other but does not adhere to other general substances. When the self-adhesive layer has fine irregularities on the order of microns, the surfaces of the opposing self-adhesive layers are also engaged by the fine irregularities, so that when the engaging surface is peeled off. Static electricity is generated intensely, and for this reason, for example, when a tray containing semiconductors is overlapped and taped, it is easy to cause an electrostatic failure, and even if measures (a) and (b) above are taken, It was difficult to apply to such uses.

Under such a background, the present invention provides a method of kneading and applying an antistatic agent,
It is an object of the present invention to provide an antistatic tape which is extremely simple and can reliably and effectively prevent generation of static electricity or remove static electricity irrespective of use conditions.

[0010]

The antistatic tape of the present invention has a structure in which one or a small number of conductor thin wires (2) are fixed to the surface of a tape (1) having an arbitrary width. In this case, it is particularly preferable that one or a small number of conductor thin wires (2) are fixed as continuous lines in the length direction of the surface of the tape (1) having an arbitrary width.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

The tape (1) may be of any width, from narrow to wide. Tape (1)
May have a tubular shape, an endless belt shape, a Mobius ring shape, or the like. The material of the tape (1) is arbitrary such as plastics, cloth (woven cloth, non-woven cloth, knitted cloth), paper and the like.

Examples of the plastics tape include polyolefin, polyester, polyamide,
Polystyrene, polyvinyl chloride, polyvinylidene chloride,
Fluorine resin, polycarbonate, polyvinyl alcohol, heat resistant resin (polyimide, polysulfone, polyethersulfone, modified polyphenylene ether, polyetheretherketone, polyetherimide, polyphenylenesulfide, poly-4-methylpentene-1, polyparaxylene, etc. ), A single-layer or multi-layer tape of a film made of a cellulosic polymer, elastomer, rubber or the like, which may be stretched in a uniaxial or biaxial direction.

The tape (1) includes a single-layer or multilayer single-layer tape, and a tape with a functional layer in which an adhesive layer or another resin layer is formed on a tape base. It is also important.

As the tape with a functional layer, for example, an adhesive (self-adhesive, adhesive, rewetting adhesive, heat-sensitive adhesive, etc.) layer, photosensitive resin composition layer And tapes having various layers such as a light-selective layer, a printing layer, a pharmaceutical composition layer, and a transfer layer.

As the conductor thin wire (2), a copper wire is suitably used, and other thin metal wires such as stainless steel and gold can also be used. The conductor thin wire (2) is preferably a bare wire, but may be a magnet wire coated with insulation. The conductor thin wire (2) may be a single wire, a bundled wire, a stranded wire, a flat foil wire, or the like.

The thickness of the thin conductive wire (2) is about several μm to several hundred μm in the case of a circular cross section, but an extremely thin one is expensive, while an excessively thick one is a tape wound. Normally, it is necessary to remove the conductor wire (2) from the
0-500 μm, even 20-300 μm, especially 30
It is preferable to select as thin as possible from the range of about 200 μm.

One or a few conductor thin wires (2) are fixed to the surface of the tape (1) having an arbitrary width. In this case, as described above, one or a small number of conductor fine wires (2) may be fixed as a continuous line in the length direction of the surface of the tape (1) having an arbitrary width. Particularly preferred.

When the tape (1) has a width of about 10 cm or 20 cm or less, one or at most two conductor thin wires (2) are sufficient. The fixing position of the conductor fine wire (2) with respect to the tape (1) surface is arbitrary, and may be along the center line or near the ear end.

The conductor fine wire (2) is usually fixed linearly to the surface of the tape (1), but may be meandering. FIG.
Fig. 4 is an explanatory view showing an example of the arrangement of the conductor thin wires (2) with respect to the tape (1) surface, and (a) shows one conductor thin wire (2) arranged along almost the center line of the tape (1) surface. In the case of (b), when one conductor thin wire (2) is arranged near one ear end of the tape (1) surface, (c) makes the conductor thin wire (2) meander on the tape (1) surface. (D) means that the conductor thin wire (2) is meandering on the tape (1) surface and two wires are arranged. (E) means that the conductor thin wire (2) is on the wide tape (1) surface. This is a case where three are arranged.

The antistatic tape of the present invention is often wound around a roll and handled. In this case, even though the conductor thin wire (2) is a thin wire, if it is stacked at the same location, the winding appearance may be poor. Therefore, when the conductor thin wire (2) is arranged in the manner shown in (a) or (b) of FIG. 1, the conductor thin wire (2) is slightly displaced when wound into a roll. Is more preferable. tape
While running (1), adjust the width of the conductive wire (2)
If the supply position is moved from left to right and then from right to left at a predetermined speed, the position of the conductor thin wire (2) can be easily shifted and meandered.

As a method for fixing the conductor fine wire (2) to the surface of the tape (1), there is a method in which an adhesive is first applied to the conductor fine wire (2), and then the tape is adhered to the tape (1). Sticking,
It may be performed at any stage of the raw film, when slitting the raw film to a predetermined width, or after the slitting operation.

When the tape (1) has an adhesive layer (1a) and the adhesive layer (1a) has tackiness, the adhesive layer (1a)
The conductor thin wire (2) may be directly adhered directly to the wire. Even when the adhesive layer (1a) is of a type that does not have tackiness, the conductor fine wire (2) can be attached at an undried or uncured stage when the adhesive layer (1a) is formed. .

Examples of the adhesive layer (1a) include a pressure-sensitive adhesive (pressure-sensitive adhesive) layer, a self-adhesive layer, a rewetting adhesive layer, and a heat-sensitive adhesive layer.

In this case, it is preferable that a release sheet (3) covering the adhesive layer (1a) is provided over the adhesive layer (1a) to which the conductive fine wire (2) is adhered.

The conductor thin wire (2) may be sandwiched and fixed between the two tapes (1), (1) adhered to each other. If the conductive wire (2) is exposed on the surface of the tape (1), there is a danger of short-circuiting, so it cannot be used in some applications. However, if the conductor wire (2) is sandwiched and fixed between two tapes (1) and (1), there is no danger of short-circuiting, so the application will be expanded, and even if the conductor wire (2) is not exposed. There is no particular problem because a sufficient antistatic effect is obtained. When the adhesive between the two tapes (1), (1) is made by pressure bonding of the surfaces of the self-adhesive layers,
The pinched and fixed conductor wire (2) can be pulled out when necessary.

The antistatic tape of the present invention may be a self-adhesive tape, an adhesive tape, a double-sided adhesive tape, a re-wet adhesive, in the form of a single tape or in a state where an adhesive layer (1a) or another resin layer is formed. Tape, packing and bundling tape, electrical insulating tape, coating tape, photosensitive resin base film, optical film, packaging film, agricultural film, interior film, advertising film, temporary protection film, It can be used in various fields in various fields for industrial and consumer use, including stationery films and medical tapes.

To give specific examples 2 and 3, in the antistatic tape of the present invention, when the tape (1) has an adhesive layer (1a), the antistatic tape may be used in a skirt, a cutter shirt, a suit or the like. By sticking one or two strips on it, you can eliminate the static shock such as clicking and crackling. If you stick the antistatic tape to the door of the car or the knob of the door, the shock caused by static Can be prevented. If the adhesive tape type is used as the bundling tape when stacking and bundling the trays accommodating the semiconductors, there is no possibility that the semiconductors may cause an electrostatic failure.
When the protective film is peeled off from the dry film having the layer structure of support film / photosensitive resin layer / protective film, and further after the protective film is peeled off, the photosensitive resin layer side is placed on the object (for example, copper foil). )
When the support film is peeled off after exposure through a photomask, if the conductive thin wires (2) are fixed to the protective film or the support film, the clinging of these films at the time of peeling is eliminated.

As described above, the tape (1) is a self-adhesive tape having a self-adhesive layer, that is, if the self-adhesive layer-forming surfaces are non-thermocompression-bonded to each other, the tape (1) is adhered. When the tape has an adhesive layer that does not adhere to the substance, strong static electricity is generated when the engagement surface is peeled off.Therefore, for example, in an application in which a tray containing semiconductors is overlapped and taped, Can not be used because it is easy to cause static electricity damage. However, in the present invention, even a self-adhesive tape can be suitably used for such purposes.

<Effect> The antistatic tape of the present invention comprises a tape (1) having an arbitrary width and one or a small number of conductive wires (2) on the surface.
Despite having a simple structure to the limit where is fixed (especially, one or a small number of conductor thin wires (2) are fixed as a continuous line in the length direction of the surface of the tape (1) of arbitrary width) And, despite the fact that the ground is not taken, it is possible to reliably and effectively prevent the generation of static electricity or remove the static electricity. In this case, antistatic properties can be obtained not only on the surface on which the conductive wire (2) is fixed, but also on the opposite surface.

[0031]

The present invention will be further described with reference to the following examples.

<Antistatic Tapes of Various Structures> Examples 1 to 6 FIGS. 1 to 6 are explanatory views showing examples of the antistatic tape of the present invention, in which (a) is a perspective view. (B) is a partial sectional view. In the perspective view (a) of each figure, the adhesive layer (1a) or the adhesive is shown by dotted points.

As the conductor thin wire (2), a bare copper wire and a bare stainless steel wire were used, respectively, having a thickness of 40 μm and a thickness of 100 μm.

Example 1 In the antistatic tape shown in FIG. 1, a conductive wire (2) coated with an adhesive is adhered to the tape (1). As the tape (1), a plastic film and a thin woven fabric slit are used, respectively.

The charged material was approached while the antistatic tape was hung vertically, but the antistatic tape hardly moved when approached from either direction. When this antistatic tape was brought close to tobacco ash, the adsorption of the ash was small.

Example 2 In the antistatic tape shown in FIG. 2, the surface of the adhesive layer (1a) of the tape (1) having the adhesive layer (adhesive layer) (1a) (that is, the adhesive tape). , One conductor thin wire (2) is stuck along almost the center line of the tape (1). As the adhesive tape, commercially available cellophane adhesive tape, electric insulating tape, and vinyl tape are used.

When the charged material was approached in a state where the antistatic tape was hung vertically, the antistatic tape hardly moved when approached from either direction. When this antistatic tape was brought close to tobacco ash, the adsorption of the ash was small. Further, when the antistatic tape was reduced in width, and a single strip was stuck to the inside of the left and right sides of the pleated skirt in the vertical direction, the cling was completely eliminated. Even when this antistatic tape is attached to the outside of the right arm of an acrylic cutter shirt, even when one piece of the antistatic tape is attached, no static electricity is felt when attaching and detaching the cutter shirt, and when wearing a polyester suit over the cutter shirt I didn't feel static when I put on and take off my suit.

Example 3 In the antistatic tape of Example 3 shown in FIG.
A 7 mm wide tape (1) having an adhesive layer (pressure-sensitive adhesive layer) (1a) (that is, a pressure-sensitive adhesive tape) with one conductor thin wire (2) attached to the surface of the adhesive layer (1a) And a 40 mm wide tape (1). As the adhesive tape, a commercially available cellophane adhesive tape is used.

The charged article was approached in a state where the antistatic tape was hung vertically. However, regardless of the width of the antistatic tape, it hardly moved when approached from either direction. When this antistatic tape was brought close to tobacco ash, the adsorption of the ash was small.

Example 4 In the antistatic tape of Example 4 shown in FIG.
As in the case of FIG. 2, the adhesive layer (1a) of the tape (1) (that is, the adhesive tape) having the adhesive layer (adhesive layer) (1a)
Conductor wire (2) on the surface of the tape (1)
This adhesive layer is further attached to the adhesive layer (1a).
(1a) covering polyester film release sheet (3)
The release-treated surface of the release sheet (3) is the adhesive layer (1a)
It is laid so that it becomes. As an adhesive tape,
Commercially available paper and cloth gum tapes are used.

From this antistatic tape, release sheet (3)
Was peeled off vigorously, but the release sheet was
(3) No trouble was found at hand.

Example 5 In the antistatic tape of Example 5 shown in FIG.
Tape with adhesive layer (self-adhesive layer) (1a) on both sides
(1) Two pieces of self-adhesive tape (that is, double-sided self-adhesive tape) are pressed together so that the respective adhesive layers (1a) face each other, and a thin conductive wire (2) is sandwiched between both tapes (1) and (1). It is fixed. The pinched conductor thin wire (2) can be pulled out when necessary. As the self-adhesive tape, a transparent type and an opaque type "Besar" tape developed by Nippon Optical Fiber Co., Ltd. are used.

This antistatic tape is used as a binding tape when trays containing semiconductors are stacked (the binding can be performed simply by overlapping and bonding the start and end sides of the tape to each other). A test for peeling was conducted, but no trouble due to static electricity was observed at all.

Example 6 In the antistatic tape of Example 6 shown in FIG.
Adhesive layers (adhesive layers) on both sides of the core sheet (1A) (1a), (1
The one formed with a) was provided on one side of the release sheet (1B) (1A)
A commercially available double-sided adhesive tape having a layer configuration of / (1a) / (1B) / (1a) is prepared, and a conductive thin wire (2) is attached to the surface of the adhesive layer (1a) on the surface side.

When this antistatic tape was brought close to tobacco ash, no ash was adsorbed.

[0046]

As described in the section of action, the antistatic tape of the present invention has one or a small number of conductive wires (2) fixed on the tape (1) surface of any width (especially, any tape). Width tape
(1) One or a small number of conductive wires (2) are fixed as continuous lines in the length direction of the surface) despite the simple structure to the limit and the grounding is not taken. In addition, it is possible to reliably and effectively prevent generation of static electricity or remove static electricity. Even in the case of the tape (1) with the adhesive layer (1a), it is possible to obtain a tape of uniform quality without any variation in the properties of the adhesive layer (1a). The antistatic property can be obtained not only on the surface on which the conductive wire (2) is fixed, but also on the opposite surface.

Moreover, this antistatic effect is permanent without deterioration over time, and is hardly affected by the atmosphere such as humidity.

Also, since the conductor thin wire (2) can be easily fixed to the tape (1) mechanically easily, the burden on equipment cost is small, and the conductor thin wire (2) itself is also low cost. There are advantages too.

Therefore, the antistatic tape of the present invention is incomparably more advantageous than conventional methods of kneading or applying an antistatic agent.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of an antistatic tape of the present invention, wherein (a) is a perspective view and (b) is a partial sectional view.

FIG. 2 is an explanatory view showing an example of the antistatic tape of the present invention, wherein (a) is a perspective view and (b) is a partial sectional view.

FIG. 3 is an explanatory view showing an example of the antistatic tape of the present invention, wherein (a) is a perspective view and (b) is a partial sectional view.

FIG. 4 is an explanatory view showing an example of the antistatic tape of the present invention, wherein (a) is a perspective view and (b) is a partial sectional view.

FIG. 5 is an explanatory view showing an example of the antistatic tape of the present invention, wherein (a) is a perspective view and (b) is a partial cross-sectional view.

FIG. 6 is an explanatory view showing an example of the antistatic tape of the present invention, wherein (a) is a perspective view and (b) is a partial sectional view.

FIG. 7 is an explanatory diagram showing an example of the arrangement of the conductor fine wires (2) with respect to the tape (1) surface.

[Explanation of symbols]

(1) ... tape, (1a) ... adhesive layer, (1A) ... core sheet, (1
B) ... release sheet, (2) ... fine conductor wire, (3) ... release sheet

Claims (7)

[Claims] An antistatic tape having a structure in which one or a small number of conductive wires (2) are fixed to the surface of a tape (1) having an arbitrary width. 2. The antistatic tape according to claim 1, wherein one or a small number of conductive wires (2) are fixed as continuous lines in the length direction of the surface of the tape (1) having an arbitrary width. 3. The antistatic tape according to claim 1, wherein a conductor thin wire (2) coated with an adhesive is adhered to the surface of the tape (1). 4. The antistatic tape according to claim 1, wherein the tape (1) has an adhesive layer (1a), and the conductive thin wire (2) is adhered to the adhesive layer (1a). . 5. A tape (1) having an adhesive layer (1a), a conductive wire (2) is adhered to the adhesive layer (1a), and further covers the adhesive layer (1a) from above. The antistatic tape according to claim 4, wherein the release sheet (3) is covered. 6. An antistatic tape according to claim 1, wherein a thin conductive wire (2) is sandwiched and fixed between the two tapes (1), (1) adhered to each other. 7. The tape (1) has an adhesive layer on at least one side.
(1a), and the adhesive layer (1a) is a self-adhesive layer (an adhesive that adheres when the self-adhesive layer forming surfaces are pressed together without heat, but does not adhere to other general substances). 7. The antistatic tape according to claim 2, which is a layer).