Static elimination brush
The static elimination brush with metal wire needles and non-conductive adhesive layers addresses fiber shedding and high costs, ensuring durable and efficient static discharge without contact, thus maintaining performance and reducing material expenses.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- TOEI SANGYO CO LTD
- Filing Date
- 2024-07-01
- Publication Date
- 2026-07-09
AI Technical Summary
Conventional static eliminator brushes suffer from deteriorating static elimination performance due to fiber shedding and bending, high manufacturing costs due to expensive materials, and increased risk of detachment during use.
A static elimination brush using metal wire needles fixed with non-conductive adhesive layers, arranged non-contactingly to objects, and optionally sandwiched between insulating tape members to prevent bending and detachment, reducing material costs and improving performance.
The brush maintains excellent static elimination performance over time without fiber shedding, reduces manufacturing costs, and prevents peeling charge, while effectively discharging static electricity with minimal voltage.
Smart Images
Figure 0007887197000002 
Figure 0007887197000003 
Figure 0007887197000004
Abstract
Description
Technical Field
[0001] The present invention relates to a self-discharging type static eliminator brush used for removing static electricity in an image forming apparatus, for example.
Background Art
[0002] In image forming apparatuses such as copiers, printers, and facsimile machines, a static eliminator brush is used to reduce or remove static electricity charged on an object to be statically eliminated, such as a sheet or a film.
[0003] Examples of such a static eliminator brush include a structure in which a conductive brush material made of a bundle of conductive fibers is sandwiched between a surface tape and a conductive back tape (Patent Document 1). The back tape is a double-sided adhesive tape having adhesiveness on both sides. In the back tape, an external ground is connected to the adhesive surface on the opposite side of the adhesive surface to which the surface tape is bonded.
[0004] However, further improvement in static elimination performance is required for the conventional static eliminator brush as disclosed in Patent Document 1. In addition, since the conventional static eliminator brush performs static elimination by contacting and sliding on the object to be statically eliminated, the conductive fibers may be laid down or bent due to long-term use. As a result, there is a problem that the static elimination performance deteriorates. In addition, the conductive double-sided adhesive tape generally has a low adhesive strength. In particular, in the static eliminator brush of Patent Document 1, since a bundle of conductive fibers made of relatively expensive materials such as carbon fibers or metal-coated fibers is used as the brush material, it is difficult to sufficiently adhere the brush material with the double-sided adhesive tape. As a result, the brush material may fall off due to contact sliding between the static eliminator brush and the object to be statically eliminated. In addition, the conductive double-sided adhesive tape is expensive, and the brush material also uses conductive fibers made of relatively expensive materials such as carbon fibers and metal-coated fibers as fiber bundles, resulting in an increase in the manufacturing cost of the static eliminator brush.
Prior Art Documents
Patent Documents
[0005] [Patent Document 1] Japanese Utility Model Publication No. 2-142000 [Overview of the Initiative] [Problems that the invention aims to solve]
[0006] This invention has been made in view of the above-mentioned problems, and its objective is to provide a novel static elimination brush that has excellent static elimination performance, does not shed brush material, and suppresses an increase in manufacturing costs. [Means for solving the problem]
[0007] The static elimination brush according to the present invention, in order to solve the above problems, is a static elimination brush for eliminating static electricity from an object to be eliminated, comprising: a long first insulating tape member having a first non-conductive adhesive layer on one surface of a first support portion; and a plurality of static elimination needles, one end of which is fixed by the first non-conductive adhesive layer and the other end of which is exposed from the first insulating tape member such that it is perpendicular to the longitudinal direction of the first insulating tape member, arranged spaced apart from each other so as to be parallel to the longitudinal direction of the first insulating tape member, wherein the static elimination needle is made of a single metal wire and performs static elimination in a non-contact manner with respect to the object to be eliminated.
[0008] According to the above configuration, instead of the conductive fiber bundle used in conventional static elimination brushes, a static elimination needle made of a single metal wire is used. Therefore, compared to the case where a conductive fiber bundle is used, it can be adhered and fixed to the first non-conductive adhesive layer well, and the detachment of the static elimination needle can be reduced or prevented. Furthermore, according to the above configuration, conductive fibers made of relatively expensive materials such as carbon fibers or metal-coated fibers are not used, and an insulating first insulating tape member is used instead of expensive conductive double-sided adhesive tape, so the increase in manufacturing costs can be suppressed. Moreover, in the above configuration, static elimination is performed without the static elimination needle coming into contact with the object to be eliminated, so the object to be eliminated becomes charged due to so-called peeling charge. In addition, unlike conventional static elimination brushes, the static elimination needle does not bend or collapse due to contact sliding. As a result, the deterioration of static elimination performance can be suppressed even after long-term use. Furthermore, the static elimination needle does not detach due to contact sliding with the object to be eliminated.
[0009] In the above configuration, the first insulating tape member and the second insulating tape member are further provided with a long second insulating tape member having a second nonconductive adhesive layer on both sides of the second support portion, and the first insulating tape member and the second insulating tape member are bonded together such that the first nonconductive adhesive layer and one of the pair of second nonconductive adhesive layers face each other, the thickness of the second insulating tape member is 200 μm or less, and preferably at least the end face of one end of the static elimination needle is exposed. According to the above configuration, the static elimination needle is sandwiched between the first insulating tape member and the second insulating tape member by bonding the first insulating tape member and the second insulating tape member such that the first nonconductive adhesive layer and one of the pair of second nonconductive adhesive layers face each other. This keeps the static elimination needle from being electrically connected to other members, but by making the thickness of the second insulating tape member 200 μm or less and exposing at least the end face of one end of the static elimination needle, the charge accumulated on each static elimination needle can be discharged with a small voltage during static elimination. As a result, the object to be statically removed can be statically removed even more effectively. Furthermore, with the above configuration, there is no need to use a complex structure for grounding the static removal needle, as is the case with conventional static removal brushes, thus reducing manufacturing costs.
[0010] Furthermore, in the above configuration, it is preferable that the other end of the static elimination needle is provided with a tip having at least one projection, or a tip that tapers towards the tip. By configuring the tip of the static elimination needle in this way, the static elimination performance can be further improved.
[0011] Furthermore, in the above configuration, it is preferable that the tip of the other end of the static elimination needle is porous. This further improves the static elimination performance.
[0012] Furthermore, in the above configuration, it is preferable that the length of the other end portion of the static elimination needle is within the range of 1 mm or more and 30 mm or less.
[0013] Furthermore, in the above configuration, it is preferable that the diameter of the other end portion, excluding the tip portion, is within the range of 30 μm or more and 100 μm or less.
[0014] Furthermore, in the above configuration, it is preferable that the distance between adjacent static elimination needles is within the range of 0.5 mm or more and 10 mm or less. [Effects of the Invention]
[0015] According to the present invention, static electricity is removed without the static elimination needle coming into contact with the object to be eliminated. As a result, the object to be eliminated becomes charged due to so-called peeling charge, and thus the static elimination performance is excellent. Furthermore, unlike conventional static elimination brushes, the static elimination needle does not bend or collapse due to contact sliding, so the deterioration of static elimination performance can be suppressed even after long-term use. In addition, since a static elimination needle made of a single metal wire is used instead of the conductive fiber bundle used in conventional static elimination brushes, the static elimination needle does not fall off. Moreover, since conductive fibers made of relatively expensive materials and conductive double-sided adhesive tape are not used, manufacturing costs can be reduced. [Brief explanation of the drawing]
[0016] [Figure 1] It is a perspective view schematically showing the static eliminator brush according to Embodiment 1 of the present invention. [Figure 2] It is a cross-sectional view schematically showing the static eliminator brush according to Embodiment 1 of the present invention. [Figure 3] It is a plan view showing the main part of the static eliminator brush according to Embodiment 1 of the present invention. [Figure 4] It is a perspective view schematically showing the static eliminator brush according to Embodiment 2 of the present invention. [Figure 5] It is a cross-sectional view schematically showing the static eliminator brush according to Embodiment 2 of the present invention. [Figure 6] Figs. (a) and (b) thereof are plan views showing the main part of the static eliminator brush according to Embodiment 2 of the present invention. [Figure 7] Figs. (a) and (b) thereof are perspective views schematically showing the tip of the static elimination needle in the static eliminator brush according to a modification of the present invention. [Figure 8] It is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static eliminator brush according to Example 1 of the present invention. [Figure 9] It is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static eliminator brush according to Example 2 of the present invention. [Figure 10] It is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static eliminator brush according to Example 5 of the present invention. [Figure 11] It is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static eliminator brush according to Example 6 of the present invention.
MODE FOR CARRYING OUT THE INVENTION
[0017] (Embodiment 1) The static eliminator brush according to Embodiment 1 of the present invention will be described below. The static eliminator brush of the present embodiment is, for example, a self-discharging type static eliminator brush used for removing static electricity charged on drums, papers, synthetic resin films, etc. of OA devices such as printers, copiers, facsimiles, etc.
[0018] As shown in Figures 1 and 2, the static elimination brush 1 of this embodiment has a first insulating tape member 11 and a plurality of static elimination needles 12. The static elimination brush 1 may also include a release sheet 13. Figure 1 is a schematic perspective view of the static elimination brush 1 according to this embodiment 1. Figure 2 is a schematic cross-sectional view of the static elimination brush 1. Figure 3 is a plan view showing the main parts of the static elimination brush 1.
[0019] The first insulating tape member 11 functions as a support member for the static elimination needle 12. The first insulating tape member 11 is elongated and has a first support portion 11a and a first non-conductive adhesive layer 11b. The first support portion 11a is elongated, and the first non-conductive adhesive layer 11b is provided on the entire surface of one side of the first support portion 11a. The length of the first insulating tape member 11 in the longitudinal direction and the width direction (direction perpendicular to the longitudinal direction) is not particularly limited and can be set as appropriate.
[0020] The thickness of the first support portion 11a is not particularly limited, but is usually in the range of 40 μm or more and 190 μm or less, preferably in the range of 60 μm or more and 150 μm or less. For example, the first support portion 11a can be an insulating film, sheet, thin plate, etc. Specifically, the first support portion 11a can be a synthetic resin film, synthetic resin sheet, or synthetic resin plate made of polyester resin, polyethylene resin, polyurethane resin, etc.; paper; nonwoven fabric; and laminates thereof.
[0021] The first non-conductive adhesive layer 11b adheres and fixes multiple static elimination needles 12. Furthermore, the first non-conductive adhesive layer 11b functions as an adhesive means when attaching the static elimination brush 1 to the electrical / electronic equipment body. At this time, the static elimination needles 12 are attached to the electrical / electronic equipment body in an exposed state, allowing for electrical connection to the electrical / electronic equipment body. Therefore, by electrically grounding the electrical / electronic equipment body, the charge collected by the static elimination needles 12 can be effectively neutralized.
[0022] The thickness of the first nonconductive adhesive layer 11b is not particularly limited, but is usually in the range of 5 μm or more and 100 μm or less, preferably in the range of 10 μm or more and 50 μm or less. By making the thickness of the first nonconductive adhesive layer 11b 5 μm or more, good adhesion to the static elimination needle 12 can be maintained, preventing or reducing the detachment of the static elimination needle 12. On the other hand, by making the thickness of the first nonconductive adhesive layer 11b 100 μm or less, flexibility can be maintained and ease of application can be preserved.
[0023] The constituent material of the first non-conductive adhesive layer 11b is not particularly limited, and for example, acrylic, rubber, silicone, urethane, epoxy, and polyolefin adhesives can be used.
[0024] The static elimination needle 12 functions as a static elimination electrode and consists of a single metal wire. The metal wire is not particularly limited and can be, for example, drawn metal wire made of stainless steel (SUS304). The cross-sectional shape of the static elimination needle 12 (the cross-sectional shape in the direction perpendicular to the longitudinal direction) is not particularly limited and is usually approximately circular. Furthermore, as shown in Figures 1 and 2, the static elimination needles 12 are arranged spaced apart from each other so as to be parallel to the width direction (the direction perpendicular to the longitudinal direction) of the first insulating tape member 11. It is preferable that the static elimination needles 12 are arranged at equal intervals from each other. The spacing distance (pitch P) between adjacent static elimination needles 12 is preferably in the range of 0.5 mm or more and 30 mm or less, and more preferably in the range of 2 mm or more and 6 mm or less. Furthermore, the pitch P may be, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, or 30 mm, and may also be within the range of any two of the values exemplified here.
[0025] As shown in Figure 3, one end portion 12a of the static elimination needle 12 is adhesively fixed to the first non-conductive adhesive layer 11b. Preferably, the one end portion 12a is adhesively fixed to the first non-conductive adhesive layer 11b so as not to protrude from the first insulating tape member 11. The length of the one end portion 12a should be such that the static elimination needle 12 does not fall off the first insulating tape member 11 during transport or use, and good adhesive fixation is ensured.
[0026] The other end portion 12b of the static elimination needle 12 is exposed so as to protrude from the first insulating tape member 11 in a direction perpendicular to the longitudinal direction of the first insulating tape member 11. Furthermore, as shown in Figure 3, a tip portion 12c is provided at the tip of the other end portion 12b, which has a tapered shape towards the tip. By providing the tip portion 12c, the static elimination performance can be improved. Moreover, it is preferable that the tip portion 12c is porous, having fine pores. This can further improve the static elimination performance. The diameter and shape of the pores are not particularly limited. As a method for making the tip portion 12c porous, for example, treatment by electrolysis using an aqueous sodium bicarbonate solution can be used (details will be described later).
[0027] The length of the other end portion 12b of the static elimination needle 12 is not particularly limited, but can usually be appropriately set within the range of 5 mm or more and 10 mm or less. The length of the other end portion 12b may be, for example, 5, 6, 7, 8, 9, or 10 mm, and may be within the range between any two of the values exemplified here. The length of the tip portion 12c is not particularly limited, but is preferably 1 / 2 or less of the length of the other end portion 12b, and more specifically, is preferably within the range of 5 mm or less. The length of the tip portion 12c may be, for example, 1, 2, 3, 4, or 5 mm, and may be within the range between any two of the values exemplified here.
[0028] The diameter of the static elimination needle 12 (excluding the tip portion 12c) is not particularly limited, but is usually set within the range of 30 μm or more and 100 μm or less, preferably within the range of 30 μm or more and 70 μm or less, and more preferably within the range of 30 μm or more and 50 μm or less. By setting the diameter of the static elimination needle 12 (excluding the tip portion 12c) to 30 μm or more, the mechanical strength of the static elimination needle 12 can be well maintained and bending of the static elimination needle 12 can be suppressed. On the other hand, by setting the diameter of the static elimination needle 12 (excluding the tip portion 12c) to 100 μm or less, the static elimination needle 12 can be well bonded and fixed even when the adhesive strength of the first non-conductive adhesive layer 11b is low. Therefore, for example, compared to the fiber bundle used in conventional static elimination brushes, the detachment of the static elimination needle 12 can be well prevented. Furthermore, the minimum diameter of the tip portion 12c, which tapers towards the tip, is preferably within the range of 60 μm or less, more preferably within the range of 30 μm or less, even more preferably within the range of 20 μm or less, and particularly preferably within the range of 12 μm or less.
[0029] The release sheet 13 is elongated and is provided to protect the static elimination needle 12 and the first non-conductive adhesive layer 11b of the static elimination brush 1 before use. The length of the release sheet 13 in the width direction (direction perpendicular to the length direction) should be sufficient to adequately cover the first non-conductive adhesive layer 11b and the other end portion 12b of the static elimination needle 12. This prevents or reduces bending of the other end portion 12b of the static elimination needle 12 even if stress is applied to it during transport of the static elimination brush 1. It also prevents the adhesive strength of the first non-conductive adhesive layer 11b from decreasing before use. The release sheet 13 is not particularly limited and conventionally known materials can be used. Specific examples of the release sheet 13 include, for example, silicone-coated paper, polyolefin resin-coated paper, and non-adhesive resin sheets.
[0030] When using the static elimination brush 1 of this embodiment, the release sheet 13 is removed, and the surface of the first non-conductive adhesive layer 11b to which the static elimination needle 12 is bonded is attached to a conductive part of the electrical / electronic equipment body. At this time, one end portion 12a of the static elimination needle 12 may be in contact with a conductive part of the electrical / electronic equipment body. The static elimination needle 12 is positioned so that its longitudinal direction is perpendicular to the object to be static eliminated, in a non-contact state. The distance between the static elimination needle 12 and the object to be static eliminated is not particularly limited as long as it is within a range in which static electricity etc. charged on the object to be static eliminated can be eliminated, but is usually set in a range of greater than 0 mm and less than or equal to 10 mm, preferably greater than 0 mm and less than or equal to 5 mm, and more preferably greater than 0 mm and less than or equal to 2 mm. The distance between the static elimination needle 12 and the object to be static eliminated may be, for example, 1, 2, 3, 4, 5, 8, 9, 10 mm, and may be within a range between any two of the values exemplified here. By preventing the static elimination needle 12 from coming into contact with the object to be eliminated, it is possible to prevent the object from becoming charged due to so-called stripping charge. Furthermore, the static elimination needle 12 will not bend or break due to contact and sliding with the object to be eliminated. In addition, it is possible to prevent the static elimination brush 1 from falling off the main body of the electrical / electronic equipment, and the static elimination needle 12 from falling off the static elimination brush 1. By attaching the static elimination brush 1 to the main body of the electrical / electronic equipment in this manner, the charge accumulated on the static elimination needle 12 from the object to be eliminated is grounded from the conductive part of the main body of the electrical / electronic equipment, and the object to be eliminated is discharged.
[0031] (Embodiment 2) Next, the static elimination brush according to Embodiment 2 of the present invention will be described below. The static elimination brush of this embodiment differs from the static elimination brush of Embodiment 1 in that it further comprises a long second insulating tape member, and the static elimination needle 12 is sandwiched and fixed between the first insulating tape member and the second insulating tape member. In the following description, components having the same configuration as those in the static elimination brush of Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted.
[0032] The second insulating tape member 14 functions as an adhesive means for attaching the static elimination needle 12, which is fixed by the first insulating tape member 11, to the main body of an electrical or electronic device. Specifically, as shown in Figures 4 and 5, the second insulating tape member 14 has a second support portion 14a and a second non-conductive adhesive layer 14b and a second non-conductive adhesive layer 14c provided on the entire surface of both sides of the second support portion 14a. The second insulating tape member 14 is bonded to the first insulating tape member 11 such that the first non-conductive adhesive layer 11b and the second non-conductive adhesive layer 14b of the first insulating tape member 11 face each other. Figure 4 is a schematic perspective view of the static elimination brush 2 according to this second embodiment. Figure 5 is a schematic cross-sectional view of the static elimination brush 2 according to this second embodiment.
[0033] The second support portion 14a can be the same as the first support portion 11a in the first insulating tape member 11.
[0034] The second nonconductive adhesive layer 14b adheres and fixes the multiple static elimination needles 12. The second nonconductive adhesive layer 14c functions as an adhesive means for attaching the static elimination brush 1 to the main body of electrical and electronic equipment when using it. The constituent materials of the second nonconductive adhesive layers 14b and 14c are not particularly limited, and the same materials as those used for the first nonconductive adhesive layer 11b can be used.
[0035] The thickness of the second insulating tape member 14 is preferably in the range of 5 μm or more and 200 μm or less, more preferably in the range of 10 μm or more and 120 μm or less, and particularly preferably in the range of 30 μm or more and 50 μm or less. The thickness of the second insulating tape member 14 may also be, for example, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, or 200 μm, and may be within the range of any two of the values exemplified here. By making the thickness of the second insulating tape member 14 5 μm or more, the mechanical strength of the second insulating tape member 14 can be well maintained. On the other hand, by making the thickness of the second insulating tape member 14 200 μm or less, the static elimination function can be well performed even when the static elimination needle 12 is not electrically connected. Furthermore, the thicknesses of the second support portion 14a and the second non-conductive adhesive layers 14b and 14c can be appropriately set within the numerical range of the thickness of the second insulating tape member 14 as described above.
[0036] In this embodiment, the static elimination needle 12 is sandwiched between the first insulating tape member 11 and the second insulating tape member 14 such that at least the end face 12d of one end portion 12a is exposed. By exposing the end face 12d and further reducing the thickness of the second insulating tape member to 200 μm or less, the charge accumulated on the static elimination needle 12 can be discharged with a small voltage during static elimination. The shape of the end face 12d may be a flat surface as shown in Figure 5, or it may be a concave or convex curved surface.
[0037] Furthermore, the exposure of the end face 12d of the static elimination needle 12 is not limited to the configuration in which the end face 12d is flush with the upper end faces of the first insulating tape member 11 and the second insulating tape member 14, as shown in Figures 4 and 5. For example, as shown in Figure 6(a), the end face 12d of the static elimination needle 12 may be exposed to the outside by having one end portion 12a protruding from the upper end faces of the first insulating tape member 11 and the second insulating tape member 14. In this case, the height H of the portion of the end portion 12a of the static elimination needle 12 that is exposed to the outside is not particularly limited, for example, as long as it does not hinder attachment to the main body of the electrical and electronic equipment, and can be set as appropriate. Also, as shown in Figure 6(b), the end face 12d of the static elimination needle 12 may be exposed inside the first insulating tape member 11 and the second insulating tape member 14, which are sandwiched together. In this case, the distance D between the end face 12d of the static elimination needle 12 and the upper end faces of the first insulating tape member 11 and the second insulating tape member 14 is not particularly limited as long as it is within a range where the charge accumulated on the static elimination needle 12 can be discharged with a small voltage during static elimination, and can be set as appropriate. Figures 6(a) and 6(b) are plan views showing the main parts of the static elimination brush 2.
[0038] In this embodiment, the release sheet 13 is provided to protect the static elimination needle 12 and the second non-conductive adhesive layer 14c of the static elimination brush 1 before use. This prevents or reduces bending of the other end portion 12b of the static elimination needle 12, and also prevents the adhesive strength of the second non-conductive adhesive layer 14c from decreasing before use.
[0039] When using the static elimination brush 2 of this embodiment, the release sheet 13 is removed, and the surface of the second non-conductive adhesive layer 14c, to which the static elimination needle 12 is bonded and fixed, is attached to the conductive part of the electrical / electronic equipment body. At this time, the static elimination needle 12 is sandwiched between the first non-conductive adhesive layer 11b and the second non-conductive adhesive layer 14b, and is not electrically connected. However, since the thickness of the second insulating tape member 14 is 200 μm or less, and the end face 12d of the static elimination needle 12 is also exposed, the static elimination needle 12 can discharge the charge collected from the object to be static eliminated with a small voltage. As a result, the charge accumulated on the static elimination needle 12 from the object to be static eliminated is grounded from the conductive part of the electrical / electronic equipment body, and the object to be static eliminated is statically eliminated. Here, when static eliminating the object to be static eliminated, the static elimination needle 12 is in a non-contact state with the object to be static eliminated, thereby preventing the object to be static eliminated from becoming charged due to peeling charge. Furthermore, the static elimination needle 12 will not bend or break due to contact and sliding with the object to be statically eliminated. In addition, it is possible to prevent the static elimination brush 2 from falling off the main body of the electrical / electronic equipment, and the static elimination needle 12 from falling off the static elimination brush 2. The distance between the static elimination needle 12 and the object to be statically eliminated is the same as described in Embodiment 1. Therefore, a detailed explanation thereof will be omitted.
[0040] (Other matters) In the above description, the present invention has been explained using preferred embodiments as examples. However, the present invention is not limited to these embodiments and can be implemented in various other forms.
[0041] For example, in Embodiments 1 and 2, the present invention was described using an example of a static elimination needle having a tip portion at the other end that tapers towards the tip. However, the present invention is not limited to such embodiments. For example, as shown in Figure 7(a), the static elimination needle 12' may have a tip portion 12c' having a projection 15 at the other end, or as shown in Figure 7(b), the static elimination needle 12" may have a tip portion 12c'' having multiple projections 15. Figures 7(a) and 7(b) are schematic perspective views showing the tip portions 12c' and 12c'' of the static elimination needles 12' and 12'' in a modified static elimination brush according to the present invention. The shape of the projections 15 shown in Figures 7(a) and 7(b) is not particularly limited, but it is preferable that they be pointed. The size of the projections 15 is also not particularly limited. Furthermore, in the static elimination needle 12'' shown in Figure 7(b), the number of protrusions 15 is not particularly limited. By providing the protrusions 15, for example, the static elimination performance can be improved compared to the static elimination needle 12' shown in Figure 7(a) which does not have the protrusions 15. The protrusions 15 can be formed by known means that allow cutting, such as scissors or nippers. Note that the static elimination needle of the present invention may also be in a form that does not have the tip portion 12c of Embodiment 1 or the protrusions 15 shown in Figure 7. [Examples]
[0042] (Example 1) In this embodiment, a static elimination brush with a structure similar to that shown in Figures 1 and 2 was used. Specifically, a static elimination brush with the following structure was used. • Support member: First insulating tape member (product name: CP101 (manufactured by Shurtape), width direction length 8 mm, length direction length 50 mm) • First support part of the first insulating tape member: Paper (thickness 0.115 mm) • First non-conductive adhesive layer of the first insulating tape member: Rubber-based adhesive layer (thickness 5 μm) · Static elimination electrode: Static elimination needle (SUS304, diameter 38μm) • Distance (pitch) between adjacent static eliminator needles: 2mm • Length of the other end of the static eliminator needle: 12mm In this embodiment, the tip of the other end of the static elimination needle was cut with scissors to form a projection as shown in Figure 8. Figure 8 is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static elimination brush according to this embodiment.
[0043] (Example 2) In this embodiment, compared to Embodiment 1, a static elimination needle was used that had a tip with multiple protrusions as shown in Figure 9. Otherwise, a static elimination brush with the same configuration as in Embodiment 1 was used. The tip of the static elimination needle was formed by cutting with wire cutters. Figure 9 is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static elimination brush according to this embodiment.
[0044] (Example 3) In this embodiment, the spacing (pitch) between adjacent static elimination needles was changed to 6 mm compared to Embodiment 1. Otherwise, a static elimination brush with the same configuration as in Embodiment 1 was used.
[0045] (Example 4) In this embodiment, the spacing (pitch) between adjacent static elimination needles was changed to 10 mm compared to Embodiment 1. Otherwise, a static elimination brush with the same configuration as in Embodiment 1 was used.
[0046] (Example 5) In this embodiment, compared to Example 1, the static elimination needle used was the same as the static elimination needle used in Example 1, but subjected to further electrolysis treatment. Specifically, by subjecting the tip, which had been cut with scissors to form a protrusion, to electrolysis treatment, a static elimination needle was used that had a tapered shape towards the tip and a porous tip (see Figure 10). Otherwise, a static elimination brush with the same configuration as in Example 1 was used. Figure 10 is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static elimination brush according to this embodiment.
[0047] The electrolysis treatment was performed by simultaneously immersing a stainless steel electrode (cathode) and an electrode made from a static eliminator needle (anode) with its tip cut off with scissors in a sodium bicarbonate aqueous solution (5% by mass concentration), and connecting a 30V DC power supply to these electrodes. The immersion time and number of immersions were 20 seconds each. This was continued until the tip became tapered and porous. The length of the tip was 5 mm.
[0048] (Example 6) In this embodiment, compared to Example 2, the static elimination needle used was the same as the static elimination needle used in Example 2, but subjected to further electrolysis treatment. Specifically, the tip, which had been cut with nippers to form multiple protrusions, was subjected to electrolysis treatment, resulting in a tip that tapered towards the end and had a porous structure, which was used as the static elimination needle (see Figure 11). Otherwise, a static elimination brush with the same configuration as in Example 2 was used. The electrolysis treatment was carried out in the same manner and under the same conditions as in Example 5. Figure 11 is a scanning electron microscope (SEM) image of the tip of the static elimination needle in the static elimination brush according to this embodiment. The length of the tip was 5 mm.
[0049] (Example 7) In this embodiment, a static elimination brush with a structure similar to that shown in Figures 4 and 5 was used. Specifically, in the static elimination brush of Embodiment 1, a second insulating tape member was further provided, and the static elimination needle was fixed by being sandwiched between the first insulating tape member and the second insulating tape member. By sandwiching the static elimination needle between the first insulating tape member and the second insulating tape member, the static elimination needle was made not electrically connected to any other member. Details of the second insulating tape member are as follows. • Second insulating tape component: Insulating double-sided tape (product name: No. 5000NS, manufactured by Nitto Denko Corporation, width 8mm, length 50mm, thickness 1 7 0 μm) • Second support part of the second insulating tape member: Nonwoven fabric • Second non-conductive adhesive layer: Acrylic adhesive layer
[0050] (Example 8) In this embodiment, compared to Example 7, the second insulating tape material was changed to one with a thickness of 50 μm. Otherwise, the same static elimination brush as in Example 7 was used. Details of the second insulating tape material used in this embodiment are as follows. • Second insulating tape component: Insulating double-sided tape (Product name: No. 5605, manufactured by Nitto Denko Corporation, width 8mm, length 50mm, thickness 50μm) • Second support part of the second insulating tape member: PET film • Second non-conductive adhesive layer: Acrylic adhesive layer
[0051] (Example 9) In this embodiment, a static elimination brush with a structure similar to that shown in Figures 4 and 5 was used. Specifically, in the static elimination brush of Embodiment 5, a second insulating tape member was further provided, and the static elimination needle was fixed by being sandwiched between the first insulating tape member and the second insulating tape member. By sandwiching the static elimination needle between the first insulating tape member and the second insulating tape member, the static elimination needle was made not electrically connected to any other member. Details of the second insulating tape member are as follows. • Second insulating tape component: Insulating double-sided tape (product name: No. 5000NS, manufactured by Nitto Denko Corporation, width 8mm, length 50mm, thickness 1 7 0 μm) • Second support part of the second insulating tape member: Nonwoven fabric • Second non-conductive adhesive layer: Acrylic adhesive layer
[0052] (Example 10) In this embodiment, compared to Example 9, the second insulating tape member was changed to one with a thickness of 50 μm. Otherwise, the same static elimination brush as in Example 9 was used. Details of the second insulating tape member used in this embodiment are as follows. • Second insulating tape component: Insulating double-sided tape (Product name: No. 5605, manufactured by Nitto Denko Corporation, width 8mm, length 50mm, thickness 50μm) • Second support part of the second insulating tape member: PET film • Second non-conductive adhesive layer: Acrylic adhesive layer
[0053] (Comparative Example 1) In this comparative example, a fibrous electrode consisting of a bundle of organic conductive fibers was used as the static elimination electrode. Aluminum tape was used as the tape member to support and fix the fibrous electrode. Details of the static elimination brush in this comparative example are shown below. • Aluminum tape: Conductive aluminum tape 363 (product name, manufactured by 3M Co., Ltd., width 8mm, length 50mm) • Organic conductive fiber: Thunderon® Acrylic (product name, manufactured by Nippon Sanmo Dyeing Co., Ltd.) • Spacing distance (pitch) between adjacent fibrous electrodes: 2 mm • Number of filaments in the fibrous electrode: 60 • Length of the exposed portion from the aluminum tape in the fibrous electrode: 10 mm
[0054] (static elimination performance) The static elimination performance was evaluated using each static elimination brush from Examples 1 to 8 and Comparative Example 1. Specifically, first, the PET film to be discharged was charged, and then the charged PET film was passed directly under one of the discharge brushes of Examples 1-8 or Comparative Example 1 to discharge the static electricity. In addition, the surface potential of the PET film was measured before and after passing under each discharge brush. The results are shown in Table 1. The details of the surface potential measurement conditions are as follows. • Surface potential meter: Digital low potential measuring instrument KSD-3000 (product name, manufactured by Kasuga Electric Co., Ltd.) • PET film (static discharge material): Lumirror (registered trademark) S10 (product name, thickness: 100 μm) (product name, manufactured by Toray Industries, Inc.) Film transport speed: 18.221 mm / sec • Distance between the static elimination needle in Examples 1-8 or the fibrous electrode in Comparative Example 1 and the film: 5 mm
[0055] [Table 1]
[0056] As can be seen from Table 1, the static elimination brushes of Examples 1 to 8 were all confirmed to have superior static elimination performance compared to the static elimination brush of Comparative Example 1. Furthermore, the static elimination brush of Example 2, which used a static elimination needle with multiple protrusions, showed improved static elimination performance compared to the static elimination brush of Example 1, which used a static elimination needle with a single protrusion. In addition, by applying electrolysis treatment, the static elimination brushes of Examples 5 and 6, which used a static elimination needle with a tapered shape and a porous tip, were able to improve static elimination performance compared to the static elimination brushes of Examples 1 and 2, which were not subjected to the electrolysis treatment.
[0057] Furthermore, the static elimination brushes of Examples 3 and 4 showed a higher potential after static elimination compared to the static elimination brush of Example 1. From this, it was found that widening the pitch between adjacent static elimination needles from 2 mm to 6 mm or 10 mm improved the static elimination performance.
[0058] Furthermore, Example 7 ~10 Therefore, it was confirmed that static electricity charged on the film could be discharged even though the static elimination needle was sandwiched between the first insulating tape member and the second insulating tape member, thus creating a state where there was no electrical connection. Also, Example 8 and 10 The static elimination brush is better in Example 7 and 9 Compared to the static elimination brush, the potential after static elimination was higher, confirming that a smaller thickness for the second insulating tape material improves static elimination performance. [Explanation of Symbols]
[0059] 1, 2... Static-removing brush 11…First insulating tape member 11a...first support part 11b...first non-conductive adhesive layer 12, 12', 12"... Static elimination needles 12a...One end part 12b...the other end 12c, 12c', 12c"...Tip 12d...end face 13…Release sheet 14…Second insulating tape component 14a...Second support part 14b…Second non-conductive adhesive layer 14c…Second non-conductive adhesive layer 15...Protrusion
Claims
1. A static elimination brush for eliminating static electricity from an object to be eliminated, A long first insulating tape member having a first non-conductive adhesive layer provided on one side of the first support portion, A plurality of static elimination needles, one end of which is fixed by the first non-conductive adhesive layer and the other end of which is exposed from the first insulating tape member so as to be perpendicular to the longitudinal direction of the first insulating tape member, arranged parallel to the longitudinal direction of the first insulating tape member and spaced apart from each other, A long second insulating tape member having a second non-conductive adhesive layer provided on both sides of the second support portion, Equipped with, The first insulating tape member and the second insulating tape member are bonded together such that the first nonconductive adhesive layer and one of the pair of second nonconductive adhesive layers face each other. The thickness of the second insulating tape member is 200 μm or less. The static elimination needle consists of a single metal wire, and at least one end of the static elimination needle is exposed, and the static elimination brush performs static elimination in a non-contact manner with respect to the object to be static eliminated.
2. A static elimination brush for eliminating static electricity from an object to be statically eliminated, A long first insulating tape member having a first non-conductive adhesive layer provided on one side of the first support portion, A plurality of static elimination needles, one end of which is fixed by the first non-conductive adhesive layer and the other end of which is exposed from the first insulating tape member so as to be perpendicular to the longitudinal direction of the first insulating tape member, arranged parallel to the longitudinal direction of the first insulating tape member and spaced apart from each other, Equipped with, The static elimination needle is made of a single metal wire, and the other end of the static elimination needle is provided with a tip having at least one projection, and the static elimination brush performs static elimination on the object to be eliminated in a non-contact manner.
3. A static elimination brush for eliminating static electricity from an object to be eliminated, A long first insulating tape member having a first non-conductive adhesive layer provided on one side of the first support portion, A plurality of static elimination needles, one end of which is fixed by the first non-conductive adhesive layer and the other end of which is exposed from the first insulating tape member so as to be perpendicular to the longitudinal direction of the first insulating tape member, arranged parallel to the longitudinal direction of the first insulating tape member and spaced apart from each other, Equipped with, The static elimination needle is made of a single metal wire, the tip of the other end of the static elimination needle is porous, and the static elimination brush performs static elimination on the object to be eliminated without contact.
4. The second insulating tape member is further provided with a long length having a second non-conductive adhesive layer on both sides of the second support portion. The first insulating tape member and the second insulating tape member are bonded together such that the first nonconductive adhesive layer and one of the pair of second nonconductive adhesive layers face each other. The thickness of the second insulating tape member is 200 μm or less. The static elimination brush according to claim 2, wherein at least the end face of one end of the static elimination needle is exposed.
5. The static elimination brush according to claim 1, wherein the other end of the static elimination needle is provided with a tip having at least one projection, or a tip having a shape that tapers towards the tip.
6. The static elimination brush according to claim 1, wherein the tip of the other end of the static elimination needle is porous.
7. The static elimination brush according to any one of claims 1 to 3, wherein the length of the other end portion of the static elimination needle is within the range of 1 mm or more and 30 mm or less.
8. The static elimination brush according to claim 2 or 5, wherein the diameter of the other end portion excluding the tip portion is within the range of 30 μm or more and 100 μm or less.
9. The static elimination brush according to any one of claims 1 to 3, wherein the distance between adjacent static elimination needles is within the range of 0.5 mm or more and 10 mm or less.