JPH0566657U - Brush roll - Google Patents

Abstract

(57) [Summary] [Composition] In a brush roll, natural or synthetic short fibers having a constant fiber length were electrostatically flocked on the roll surface coated with an adhesive, and a conductive polymer was flocked. The surface of the fiber and the adhesive layer is coated. [Effect] Compared with the conventional brush roll, the roll production becomes easier and simpler, and the workability of the production is improved. In addition, napped short fibers can be planted on the roll surface at a uniform density without entanglement. Therefore, the more the length of the short fibers to be fluffed is constant, the dimensional accuracy of the length of the napped portion on the roll surface becomes higher. Will be higher. Moreover, the roll surface and the flocked fibers can be made electrically conductive simultaneously and uniformly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brush roller used as a toner conveying roller or a paper feeding roller in a copying machine.

[0002]

[Prior Art]

 Conventionally, in this type of brush roll, as shown in FIG. 3, a moquette woven conductive tape 10 having an adhesive applied on the back side is spirally wound around and fixed to the roll. Was manufactured by a method of completely fixing it with a hot melt adhesive or the like to prevent peeling during rotation.

In order to make the brush roll itself non-chargeable, not only the conductive tape 10 but also an adhesive to be back-coated, which has conductivity by mixing carbon black, is used.

[0004]

[Problems to be solved by the device]

 However, it is very difficult to spirally wind the long and narrow tape 10 at an accurate position on the roll, and therefore, the winding operation of the conductive tape 10 is very troublesome and time-consuming. .

Further, in the toner conveying roller or the like, it is required that the length of the napped portion of the surface fiber has a high dimensional accuracy of being within ± 0.5 mm with a roller having a diameter of about 30 mm. However, the conductive tape 10 used in the past is moquette woven and the fibers of the surface are not even, and the dimensional accuracy of the length of the napped portion is ± 2.0 mm with a roller having a diameter of about 30 mm. It was very bad, such as sometimes reaching.

An object of the present invention is to provide a brush roll which solves the above-mentioned drawbacks of the prior art, has improved workability in roll production, and has high dimensional accuracy with respect to the length of the napped portion of the fiber on the roll surface. It is in.

[0007]

[Means for Solving the Problems]

 The brush roll provided by the present invention electrostatically flocks natural or synthetic short fibers having a certain fiber length on the roll surface of the brush roll on which the adhesive is applied, and implants a conductive polymer. In addition, it is characterized in that the surface of the fiber and the adhesive layer is coated.

That is, the present invention utilizes the technology of electrostatic flocking to uniformly plant short fibers of a certain length on the surface of a roll, and at the same time to generate a conductive polymer by oxidative polymerization. The brushed fiber and the other roll surface are made electrically conductive together by bonding to the brushed roll, and the brush roll is finished.

A specific method of manufacturing the brush roll according to the present invention is as follows. First, a natural or synthetic short fiber having a certain fiber length is prepared by cutting or the like, and at the same time, an adhesive is applied to the surface of a roll produced by machining, which is carried into a hair-implanting chamber and then a natural or synthetic short fiber The fibers are passed through a sieve, sprayed in the space between the roll surface and the electrode plate, and a high voltage of tens of thousands of volts is applied between them to plant the short fibers on the roll surface. Then, the flocked roll is placed in an aqueous solvent (water and a mixed solvent of water and methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutanol, tetrahydrofuran, dioxane, dimethylacetamide, etc.), and the conductive polymer is added. A conductive polymer is produced by adding a monomer capable of forming and a chemical oxidant as a catalyst, and carrying out oxidative polymerization under predetermined conditions. It allowed simultaneously bonded onto the roll. Thus, the brush roll obtained by coating the surface of the short fibers and the adhesive layer with the conductive polymer is finished.

As the short fibers used in the present invention, short fibers having a fiber length of about 0.5 to about 3 mm are suitable, and either natural fibers or synthetic fibers may be used. A long fiber having a fiber length of more than about 3 mm is not preferable because the fibers are easily entangled with each other and the flock density becomes nonuniform during electrostatic flocking. When such long fibers are used, long fibers having a denier of about 50 to 65 denier are used, and further short fibers are electrostatically flocked after electrostatic flocking of the long fibers so that the short fibers are long fibers. It is more preferable to have a structure that fills the gap between them, because good performance as a brush roll can be exhibited.

The short fibers are more preferable as they have a certain length with higher accuracy. It is desired that the length has an error of at most ± 0.5 mm.

The natural or synthetic fibers used in the present invention include, for example, polyamide fibers (6-nylon, 6,6-nylon, etc.), polyester fibers (including those dyeable with a basic dye), and acrylic. Fiber, aromatic imide fiber (aramid fiber, etc.), vinylon fiber, regenerated cellulose fiber, natural fiber (wool, cotton, hemp), or split type of polyamide / polyester, polyester / polypropylene, polystyrene / polyamide, polystyrene / polyester, etc. The composite spun fibers of sea-island type, core-sheath type and the like are listed. It may be dyed or undyed.

The conductive polymer according to the present invention covers the surface of the adhesive layer on the roll surface and binds to the inner and outer surfaces of the electrostatically-implanted short fiber. The coating of the conductive polymer prevents static electricity from being charged on the flocked fibers when the brush roll is used.

As the conductive polymer, polyanilines such as aniline, o-, m- or p-chloroaniline, o-, m- or p-methoxyaniline, o-, m- or p-ethoxyaniline are used. , O-, m- or p-methylaniline or other polymers or copolymers: polythiophenes such as thiophene, 3-methylthiophene, 3-methoxythiophene or other polymers or copolymers: pyrroles, eg pyrrole, and 3-substituted Examples thereof include polymers and copolymers of various substituted pyrroles belonging to pyrrole, 3,4-substituted pyrrole, N-substituted pyrrole and the like.

Therefore, as the monomer capable of forming a conductive polymer, a monomer forming these polymers or copolymers is used.

Examples of the chemical oxidizing agent include ferric salts such as ferric chloride and ferric perchlorate; peroxodisulfates such as ammonium peroxodisulfate and potassium peroxodisulfate; and permanganate. Agents that accelerate the polymerization of the above monomers, such as potassium, chromic acid, and halogens, can be applied.

Further, the main body of the brush roll may be composed of a shaft forming a roll surface and a rotary shaft fitted and supported by the shaft as in the conventional product. The shaft may be made of metal such as stainless steel, or synthetic resin such as SBR, NBR, PU, and silicone resin, while the rotating shaft is usually made of metal such as stainless steel. To be done. Then, in order to enable conduction between the roll surface of the brush roll and the rotating shaft, the above-mentioned conductive polymer is usually integrally coated on the entire rotating shaft or a portion adjacent to the shaft. This allows static electricity to flow from the roll surface to the rotating shaft.

[0018]

[Action]

 In the present invention, the short fibers that have been napped can be planted on the roll surface of the brush roll with uniform density and without entanglement by electrostatic flocking of short fibers. Therefore, the more uniform the length of the short fibers to be flocked, the higher the dimensional accuracy of the length of the napped portion on the roll surface.

Further, in the present invention, since the electrostatic flocked roll is coated with the conductive polymer, the roll surface and the flocked fiber can be made conductive at the same time. Moreover, the conductivity can be surely and uniformly achieved.

The operations for electrostatic flocking and production of conductive polymers are compared to conventional brush roll manufacturing operations of manufacturing conductive tape, backing adhesive, spiral wrapping, and securing both ends. It is easier and easier to work with, and can be completed in a shorter time.

[0021]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example brush roll, and FIG. 2 shows an enlarged napped portion of the roll surface.

The brush roll of the embodiment is formed by inserting a SUS 304 rotary shaft having a shaft length of 300 mm and a shaft diameter of 7 mm into an SBR roll 4 having a roll surface length of 260 mm and a roll diameter of 20 mm. As shown in these figures, the surface of the adhesive layer 2 on the roll was electrostatically flocked with 2 denier and 2.0 mm long 6,6-nylon fibers as short fibers having a constant fiber length. Then, the surface of the short fibers 1 ... And the adhesive layer 2 in which the conductive polymer 3 is flocked is coated.

This brush roll was manufactured according to the following procedure. First, an acrylic emulsifier (a type that also uses an epoxy curing agent) as an adhesive is applied to the outer surface of the roll 4 after the primer treatment, and after 2 hours, the adhesive layer is applied in the hair transplant chamber. On the surface of No. 2, 6,6-nylon fibers of 2 denier and 2.0 mm in length were electrostatically flocked, and then heat-cured at 130 ° C. for 20 minutes.

Then, the flocked roll 4 was put into a mixed solvent of water / isopropyl alcohol = 90/10, and 0.015 mol / l of pyrrole as a monomer and 0.0375 mol / l of ferric chloride as a catalyst. Is added and oxidative polymerization is carried out at 15 ° C. for 8 hours to produce polypyrrole of the conductive polymer 3 and simultaneously coat the surfaces of the flocked short fibers 1 ... And the adhesive layer 2 on the roll 4 together. And finished into a brush roll.

Thus, the brush roll of the example has an electric resistance value of 5 to 7 × 10 ⁴ Ω between one end of the rotary shaft and the center of the surface of the roll 4, which is extremely effective in eliminating static electricity. It was excellent.

[0027]

[Effect of the device]

 As described above, according to the present invention, the roll production is easier and simpler than the conventional brush roll, the workability is improved, and the napped portion of the fiber on the roll surface is improved. The effect that a brush roll having high dimensional accuracy in length can be provided is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a brush roll according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a roll surface of the brush roll shown in FIG.

FIG. 3 is a front view of a conventional brush roll.

[Explanation of symbols]

 1 ... Electrostatic flocked short fibers 2 ... Adhesive layer 3 ... Conductive polymer 4 ... Roll

Claims (1)

[Scope of utility model registration request] 1. A brush roll adhesive-coated roll surface is electrostatically flocked with natural or synthetic short fibers having a fixed fiber length, and a conductive polymer is flocked to the fibers and the adhesive. A brush roll characterized by being coated on the surface of a layer.