JP2544674Y2 - Abrasion-resistant static elimination sheet - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to OA equipment such as copying machines,
Alternatively, the present invention relates to a static elimination sheet having excellent abrasion resistance that can be used for removing static electricity generated in a plastic manufacturing industry or the like.

[0002]

2. Description of the Related Art Conventionally, as a method for removing static electricity from OA equipment such as a copying machine, as described in Japanese Patent Publication No. 56-30960, a metal bar is bent and carbon fibers are interposed at predetermined intervals. There is known a static elimination bar which is sandwiched in a bundle and protruded. However, the static elimination bar in which the carbon fibers protrude in this way is broken by contact with a charged material, and not only loses the static elimination performance,
The broken carbon fiber becomes a foreign substance and has an adverse effect. For example, in the photosensitive drum of a copying machine or the like, if the carbon fiber of the static elimination bar installed on the paper loading side is broken, the carbon fiber adheres to the photosensitive drum and deteriorates the photosensitive state, or because of the high voltage applied to the photosensitive drum, There has been a problem that the current leaks and damages the photosensitive drum.

[0003] In addition to the above, JP-A-63-26999
JP-A-56-50346 discloses a static eliminator in which conductive fibers are planted, but has the same problem as described above.

Japanese Unexamined Utility Model Application Publication No. 60-161373, Japanese Utility Model Application No. 1-114145, and Japanese Utility Model Application No. 2-140285 disclose a static eliminator made of a nonwoven fabric. And the same problem as above occurred.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a sheet excellent in abrasion resistance and static elimination.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a conductive nonwoven fabric.
Is a sheet in which the net-like material 2 is adhered to at least one surface. The fiber width W of the fiber constituting the bonded net-like material 2 is 2 mm or less, and the fiber gap L is 1.0 to 4.0.
If it is mm, a sheet having more excellent static elimination properties and abrasion resistance can be obtained.

The fibers constituting the conductive nonwoven fabric 1 include:
If fine fibers of 0.5 denier or less are contained, or if the fiber surface is covered with an electron conjugated polymer, the charge elimination property is more excellent.

[0008]

In the abrasion-resistant static elimination sheet of the present invention, a net-like material is adhered to at least one surface of the conductive non-woven fabric.
The charged material does not directly contact the conductive nonwoven fabric, and the conductive nonwoven fabric does not wear. Further, since the net-like material is adhered to the conductive non-woven fabric, there is always a portion that does not cover the conductive non-woven fabric, and static electricity can be removed by the exposed portion of the conductive non-woven fabric. Furthermore, depending on the thickness of the net-like material,
Since a minute space is formed between the conductive nonwoven fabric and the charged material, corona discharge is more likely to occur, and the charge can be more efficiently removed.

The conductive nonwoven fabric 1 which can be used in the present invention is obtained by subjecting the nonwoven fabric to a conductive process such as metal plating, vapor deposition, sputtering, ion plating, metal spraying, or coating with a conductive polymer. It was done.

The fibers used in the nonwoven fabric of the present invention are not particularly limited. For example, natural fibers such as silk, wool, cotton, hemp, and asbestos; regenerated fibers such as rayon fibers; semi-synthetic fibers such as acetate fibers; Synthetic fibers such as polyamide fibers, polyvinyl alcohol fibers, acrylic fibers, polyester fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, polyurethane fibers, polyethylene fibers, and polypropylene fibers can be used. In addition, not only fibers composed of one component like the above-mentioned fibers, but also core-sheath type or side-by-side type composite fibers composed of two or more components can be used.

Further, when a fiber which can be divided into ultrafine fibers having a fineness of 0.5 denier or less by using a mechanical or chemical treatment is divided and used, a particularly excellent static elimination property is exhibited. This is because corona discharge is likely to occur when microfibers are present on the surface of the conductive nonwoven fabric.

The fibers which can be divided into ultrafine fibers having a fineness of 0.5 denier or less are sea-island type fibers having a cross section in which one component has the other component arranged in an island shape, and different components are alternately laminated in layers. Examples include, but are not limited to, multiple bimetallic fibers having a cross section, or chrysanthemum flowers having a cross section in which one component is radially arranged in multiple components.

Examples of the combination of the resin components constituting the dividable fiber include a polyamide resin and a polyester resin, a polyamide resin and a polyolefin resin, a polyester resin and a polyolefin resin, and a polyester resin and a polyacrylonitrile resin. Can, but is not limited to.

Since the corona discharge performance is improved as the number of such ultrafine fibers increases, it is most preferable that the ultrafine fibers be 100%.

In the present invention, a non-woven fabric is formed using the above-mentioned fibers.
It is preferably used because corona discharge is more likely to occur and it is more excellent in static elimination. As a method for forming such a non-woven fabric, a method in which fibers are entangled with a fiber web obtained by a card method, an air lay method, a wet method, a spun bond method, or the like by a water flow or a needle, and heat or a binder is partially applied. An example is a method of performing the bonding.

In the case of using a dividable fiber capable of obtaining the above-mentioned ultrafine fiber, the dividable fiber is divided by a water flow or a needle to obtain the ultrafine fiber, and the fibers are entangled with each other. This is a preferred method of forming a nonwoven fabric.

The non-woven fabric obtained as described above is subjected to conductive processing to obtain the conductive non-woven fabric 1 of the present invention.

Examples of the conductive processing that can be used in the present invention include the above-described conductive processing such as metal plating, vapor deposition, sputtering, ion plating, metal spraying, and coating with a conductive polymer. Any method can be used as long as it is a method of applying, and is not particularly limited. However, when a coating treatment with a conductive polymer is performed, in particular, when a coating treatment is performed with an electron conjugated polymer, the coating does not peel off because of good adhesion, and has durability, Excellent in flexibility and static elimination. Further, even if the fiber coated with the electron conjugated polymer is detached and adheres to a photosensitive drum of a copying machine or the like, there is an advantage that current is hard to leak due to relatively low conductivity.

As a method of coating the fiber surface with the conductive polymer, at least iron (II) chloride, copper chloride (I
A method of impregnating the above nonwoven fabric with a solution containing an oxidizing agent such as I) and then polymerizing it by contacting with a monomer; a polymer matrix containing at least an oxidizing agent such as iron (II) chloride and copper (II) chloride Can be exemplified by a method of adhering to the above-mentioned nonwoven fabric and then polymerizing by contacting with a monomer, but the method is not limited thereto. When the monomer is in a liquid state, the monomer may be impregnated, coated, or sprayed on the nonwoven fabric to which the oxidizing agent is attached. It can be carried out by placing a nonwoven fabric to which the agent has adhered.

Examples of the monomer to be polymerized include benzene, aniline, phenylacetylene, pyrrole, furan, thiophene, indole, acetylene and derivatives of these electron conjugated monomers. Among these, pyrrole has excellent conductivity and polymerizability, and can be particularly preferably used.

The conductive nonwoven fabric 1 obtained as described above
The abrasion-resistant static elimination sheet 3 of the present invention is obtained by bonding the net-like material 2 to at least one surface of the sheet.

The net-like material 2 of the present invention protects the conductive non-woven fabric 1 from abrasion with a charged material without hindering the static elimination of the conductive non-woven fabric. Therefore, the net-like material 2 is formed on one side of the conductive nonwoven fabric 1,
Or glue on both sides. It is sufficient that the net-like material 2 is adhered only to a portion that may come into contact with a charged material. However, if the net-like material 2 is adhered to the entire surface of the conductive non-woven fabric, there is no wear point and the net-like material 2 can be suitably used.

Examples of the material of the net-like material 2 include synthetic fibers made of polyamide resin, polyvinyl alcohol resin, polyvinylidene chloride resin, polyvinyl chloride resin, polyester resin, polyacrylonitrile resin, polyethylene resin, polypropylene resin, polyurethane resin and the like. ,
Regenerated fiber such as rayon and acetate, inorganic fiber such as glass fiber and carbon fiber, vegetable fiber such as cotton and hemp, wool,
Animal fibers such as silk may be used, and are not particularly limited.

The net-like material 2 made of these materials can be exemplified by a woven fabric, a knitted fabric, a braid, a lace, a net, a warif and the like, and has a space where the conductive nonwoven fabric 1 can be exposed. Things.

The net 2 may be bonded with an adhesive, but if the net 2 is made of a heat-fusible fiber such as polyethylene fiber or polypropylene fiber, heating or By applying heat and pressure, it can be fused to the conductive nonwoven fabric 1, which is easy in manufacturing.

If the fiber width W of the bonded net-like material 2 exceeds 2 mm, the portion covering the conductive nonwoven fabric 1 becomes too wide,
Since the static elimination performance tends to decrease, the fiber width W is preferably suppressed to 2 mm or less, more preferably 1 mm or less. Note that these values are shown in FIG. 2 or FIG.
As shown in (c), the thickest part of the fiber of the net-like material 2 is used as a reference.

When the thickness D of the fibers of the bonded net-like material 2 exceeds 3 mm, the distance between the conductive nonwoven fabric 1 and the charged material is too long, so that corona discharge hardly occurs and the static elimination performance tends to decrease. Therefore, the thickness D of the fiber is preferably 3 mm or less, more preferably 2 mm or less.

If the fiber gap L of the bonded net-like material 2 exceeds 4 mm, the exposed area of the conductive non-woven fabric 1 becomes too large, resulting in poor abrasion resistance. Since the exposed area of No. 1 is too small, the static elimination performance tends to decrease.
It is preferably from 4 to 4 mm, more preferably from 1.5 to 3.0 mm.
0 mm. Note that the fiber gap L is shown in FIG.
As shown in FIGS. 3A to 3C, it refers to the shortest distance between the fibers, not the distance between the centers of the fibers.

The abrasion-resistant static elimination sheet 3 obtained as described above is used after being cut into an appropriate shape such as a tape depending on the application.

Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments. The surface resistance of the conductive nonwoven fabric of the example is a value measured by a surface resistance meter (Loresta AP, manufactured by Mitsubishi Yuka Co., Ltd.).

In the static elimination effect test, a 13.0 KV static electricity was charged by rubbing the polyimide film with a wool cloth.
Samples cut to 0 cm were placed at 3 mm intervals and the speed was 30
When moving at cm / sec, the remaining charged voltage was measured.
This frictional charging method and charged voltage measurement are based on JIS standard, L10
The test is performed using a frictional voltage tester (EST-7, manufactured by Kanebo Engineering Co., Ltd.) based on the 92 reference method. This measurement is performed at a temperature of 20 ° C. and a humidity of 50%.

Further, the abrasion resistance test is based on JIS, L10
According to the C method (appearance, retention tester) according to No. 76, the load is 20 g / cm ² and the number of times of friction is 50 times, and the evaluation is made visually. This evaluation is H <M <L <
It shows that the wear resistance is excellent in the order of N.

[0033]

EXAMPLES (Examples 1 to 3) A chrysanthemum-shaped fiber having a fineness of 2 denier, a fiber length of 38 mm, and a length of 38 denier, which can be divided into 0.1 denier, mainly composed of a polyester component as a fiber and joined by a polyamide component. It was used. After 100% of the chrysanthemum flower type fiber is made into a fiber web through a card machine, the water pressure is 50 to 95%.
entangled by a water flow of kg / cm ² , with a basis weight of 85 g / m ² and a thickness of 0.5 m
m was obtained.

After impregnating the nonwoven fabric with iron (II) chloride at a concentration of 30%, the pyrrole solution is brought into contact with a vaporized pyrrole monomer gas to form a polypyrrole film on the fiber surface of the nonwoven fabric, thereby forming the conductive nonwoven fabric 1 I got The surface resistance of this conductive nonwoven fabric 1 was 1.5 × 10 ² Ω / b.

Then, three types of net-like materials 2 having different fiber thicknesses D and fiber gaps L made of a core-sheath type monofilament having a core component of polypropylene and a sheath component of polyethylene are plain-woven, After being placed on the nonwoven fabric, the net-like material 2 is fused by a roller press machine at 130 ° C. and 5 kg / cm ² , and the abrasion-resistant static elimination sheet 3
I got The fiber width W, fiber thickness D, and fiber gap L of the net-like material portion of the obtained abrasion-resistant static eliminating sheet 3 were as shown in Table 1.

[Table 1]

(Examples 4 and 5) A film made of low-density polyethylene arranged in a lattice and having a fiber thickness D of 35 μm before fusion, on a conductive nonwoven fabric obtained in the same manner as in Example 1. With a fiber width W of 1.0
After placing the two types of net-like materials 2 mm and 2.0 mm, the net-like materials 2 are fused by a roller press machine at 140 ° C. and 5 kg / cm ² to obtain an abrasion-resistant static elimination sheet. 3 was obtained. The fiber width W, fiber thickness D, and fiber gap L of the net-like material portion of the obtained abrasion-resistant static eliminating sheet 3 were as shown in Table 1.

(Example 6) The nonwoven fabric obtained in the same manner as in Example 1 was coated with nickel by a conventional electroless plating method, and the nonwoven fabric was subjected to conductive processing to obtain a conductive nonwoven fabric 1. This conductive nonwoven fabric 1
Had a surface resistance of 1.5 × 10 ² Ω / b.

Then, the same net-like material 2 as in Example 1 was fused on a conductive nonwoven fabric under the same conditions as in Example 1 to obtain an abrasion-resistant neutralizing sheet 3. The fiber width W, fiber thickness D, and fiber gap L of the net-like material portion of the obtained abrasion-resistant static eliminating sheet 3 were as shown in Table 1.

Examples 1 to 6 obtained as described above,
And only the conductive nonwoven fabric obtained in the same manner as in Example 1, and a non-bonded net-like material as a comparative example,
A static elimination effect test and an abrasion resistance test were performed. The results are shown in Table 1.

[0040]

Effect of the Invention The abrasion-resistant static elimination sheet of the present invention has a net-like material adhered to at least one surface of the conductive non-woven fabric, so that the conductive non-woven fabric does not wear and covers the conductive non-woven fabric. Since it is possible to eliminate static electricity by the part that has not been removed, it is excellent in friction resistance and static elimination property. In addition, since a minute space is formed between the conductive nonwoven fabric and the charged material due to the thickness of the net-like material, corona discharge is more easily generated, and static electricity can be removed more efficiently.

When the fiber width of the net-like material is 2 mm or less and the fiber gap is 1.0 to 4.0 mm, the balance between static elimination and abrasion resistance is excellent.

Further, the fibers constituting the conductive non-woven fabric include:
When ultrafine fibers having a density of 0.5 denier or less are contained, corona discharge is likely to occur, and if the fiber surface is covered with an electron conjugated polymer, it has good adhesion and does not peel off. Excellent in flexibility and static elimination.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wear-resistant static elimination sheet of the present invention.

FIG. 2 is a partially enlarged view of the wear-resistant static elimination sheet of the present invention.

FIG. 3 is an enlarged front view of the abrasion-resistant static elimination sheet when the net-like object is a knit.

FIG. 4 is an enlarged front view of the abrasion-resistant static elimination sheet when the net-like object is a yarn race.

FIG. 5 is an enlarged front view of the abrasion-resistant static elimination sheet when the net-like object is a flat-punched braid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductive nonwoven fabric 2 Net-like material 3 Abrasion-resistant static elimination sheet W Fiber width D Fiber thickness L Fiber gap

Claims (5)

(57) [Scope of request for utility model registration] 1. A wear-resistant static elimination sheet, wherein a net-like material 2 is adhered to at least one surface of a conductive nonwoven fabric 1. 2. A fiber width W of a fiber constituting the bonded net-like material 2 is 2 mm or less.
The abrasion-resistant static elimination sheet according to the above. 3. The abrasion-resistant static eliminating sheet according to claim 1, wherein a fiber gap L of the bonded net-like material 2 is 1.0 to 4.0 mm. 4. The abrasion-resistant static eliminating sheet according to claim 1, wherein the fiber surface of the conductive nonwoven fabric 1 is covered with an electron conjugated polymer. 5. The fibers constituting the conductive nonwoven fabric 1 have a content of 0.1%.
The abrasion-resistant static elimination sheet according to claim 1, 2, 3, or 4, which contains ultra-fine fibers of 5 denier or less.