KR20070058154A - Electro-static recticulated sponge roll and the manufacturing process - Google Patents

Abstract

A conductive film reticulated sponge roll and a manufacturing method therefor are provided to quickly fuse and punch an inner steel for inserting a core shaft at low cost by a hot wire. A conductive film reticulated sponge roll includes a conductive film reticulated roll tube, an inner steel, and a core shaft(31). A conductive film(12) by conductive silicon coating is coated on the muscular tissue of a reticulated sponge(11) to form the conductive film reticulated roll tube with the volume resistance of 10^3 to 10^9Ф. The inner steel is installed in the center of the conductive film reticulated roll tube. The core shaft(31), inserted into the inner steel, adheres to the inner steel.

Description

Conductive continuous bubble sponge roll and its manufacturing method {Electro-static recticulated sponge roll and the manufacturing process}

1 is a manufacturing process diagram of the present invention

Fig. 2 is a plan view of this invention toner supply roll manufactured in the embodiment

Figure 3 is a front view of a conventional toner supply roll

Figure 4 is a photograph of the muscle tissue of the continuous bubble sponge

Explanation of Major Symbols

11 is a continuous bubble sponge; 11a is a sponge block; 12, a conductive film; 13 is a roll tube surface; 21 is lumen; 31 is a mandrel; 41 is an adhesive layer; 51 is a heating punch.

Utility Model Registration Publication No. 20-0375301 Daejeon Province Sponge Roll

The present invention is to provide a conductive continuous bubble sponge roll and a method of manufacturing the same.

Rolls for supplying paper or toner, which are installed in these apparatuses including document (printing) functions such as inkjet printers, laser printers, and facsimile, are rubber or rubber sponges, which are heat-curable resins, as cited in FIG. Alternatively, the lumen 2 is formed at the center of the roll tube 1 made of polyurethane foam, the mandrel 3 for driving the roll is fixed to the lumen, and the surface of the roll tube 1 is fixed. It manufactures by cutting (1a) to a roll specification. In order to solve the problem that the toner supply rolls are not dispersed and agglomerated when the toner is fed, the toner supply rolls are charged and the lumen for the core assembly is installed in the sponge roll tube. do.

In the conventional roll tube, a roll tube is used as a thermosetting sponge including solid rubber (silicone rubber, chloroprene, EPDM, etc.) or rubber sponge (silicone rubber sponge, EPDM rubber sponge, chloroprene sponge). The thermosetting sponge roll is difficult to manufacture the sponge roll due to the heavy weight of the product and the expensive sponge price due to the processing characteristics of the thermosetting resin. Specifically, when the thermosetting resin is used, the production cost is very high because the crosslinking process is carried out by the molding method to bond the roll tube and the mandrel. it's difficult.

In particular, these thermosetting sponges are not melt perforated by the hot wire (hot wire or stick) proposed in the present invention. The exceptionally specially formulated PU sponge (Polyester) is capable of high frequency processing, but the special compound must be manufactured first for high frequency processing, making it difficult to use and expensive.

Furthermore, when examining the polyurethane foam as the material of the roll tube, it is pointed out that the foam cell is uneven, the durability is low, and the toner is entangled. The roll tube materials must contain a large amount of conductive filler in the sponge material polyol to produce the electrical insulation resistance of the roll tube sponge into an electrostatic sponge having a volume resistivity of 10 ⁵ Ω or less. Fillers confused with sponge materials are a significant impediment to the foaming process, and overcoming them requires the introduction of special equipment. Therefore, the toner supply roll is accompanied with the dual task of providing conductivity and at the same time achieving uniformity of the sponge cells to prevent non-uniformity of the supply amount of the toner.

As mentioned above, the toner supply rolls of office equipment printing devices such as laser printers and fax machines are important parts involved in improving the printing quality. Until now, silicon toner supply rolls (rubber rolls) and polyurethane sponge rolls have been used. These toner supply rolls are all pointed at a problem in that the supply price is high and the print quality is deteriorated due to the nonuniformity of the sponge cells.

The present invention proposes a toner supply roll made of a conductive silicone coated recticulated sponge as a toner supply roll that is easy to manufacture and disperse toner under the technical environment as described above, and at the same time, suitable electrical conductivity is applied to the continuous bubble sponge. The toner supply roll was provided to facilitate the adhesion of the mandrel and the continuous bubble sponge roll tube.

The feature of the continuous bubble sponge roll proposed by the present invention is that unlike conventional sponge rolls, it is a continuous bubble that can quickly puncture the lumen with a heating punch, and because it is a continuous bubble foam, mechanical processing is very easy. In addition, the adhesion of the mandrel and the continuous bubble sponge is conducted by using a conductive hot melt adhesive, and the roll tube is a continuous bubble sponge, which facilitates heat dissipation, thereby improving the wear resistance and heat resistance of the roll. It was blended with to prepare a conductive coating solution, the conductive coating solution was subjected to coating curing (crosslinking, Cure) to the continuous bubble sponge muscle tissue.

In the present invention, the continuous bubble sponge is a sponge made of a continuous sponge muscle tissue by opening the bubble membrane of the sponge cell. In contrast, a typical sponge is a sponge having a bubble cell of 50% level. The present invention can be punched by cutting with a mill in relation to the steel structure for inserting the mandrel, and in particular, it is possible to melt-melt the mandrel inserted lumen quickly and at low cost by a hot wire or stick. It is to propose a continuous bubble sponge as a roll tube manufacturing sponge. The present invention is to provide a coating liquid for forming a conductive film in the muscle tissue of the continuous bubble sponge. The present invention is to provide a conductive film continuous bubble sponge having a volume resistivity of 10 ³ to 10 ⁹ Ω by forming a conductive film in the root tissue of the continuous bubble sponge. The present invention seeks to provide a conductive film continuous bubble sponge roll in which a contact portion between a roll tube and a mandrel is bonded with a conductive adhesive layer.

This invention is demonstrated in detail with reference to an accompanying drawing.

The toner feed roll is manufactured or selected from a sponge, imparts conductivity to the sponge, cuts the sponge into a sponge block for roll tube processing, forms a lumen in the sponge block, inserts a mandrel into the lumen, and attaches the mandrel. The sponge outer edge of the installed sponge block is then cut into shapes and sizes of toner feed rolls.

Thermosetting sponges and polyurethane foams have a very high 50% distribution of closed cells that prevent the release of molten gas or cutting chips. In addition, the processing time becomes long even when drilling is performed using a processing mill.

The invention can also be used to cut lumen for mandrel insertion into a sponge using a mill, and in particular, a roll tube that can quickly melt-drill the mandrel insertion lumen at low cost by means of a hot wire or stick. As a manufacturing sponge, a hot-bubble continuous bubble sponge is recommended. The continuous bubble sponge is removed only by the bubble cell of the sponge cell and is opened only by the muscle tissue. When cutting the lumen for the installation of the shaft as a cutting mill, the cutting debris is discharged through the air passage formed by the muscle tissue, so that the cutting process is easy and the precision of the cutting specifications is increased. I can keep it. In particular, since the continuous bubble sponge is released from the gas flow passage formed by the muscle tissue can be quickly formed by melt-punching the lumen with a heating punch of 200 ~ 700 ℃ to the continuous bubble sponge block.

The continuous bubble sponge is a sponge in which the bubble cells of the sponge are opened and only the muscle tissue is opened. The continuous foam sponge is mixed with an appropriate amount of foaming agent (viscosity regulator), foaming agent, and dye in the base polymer and foamed in a container, and then the foam film is removed to prepare a continuous foam sponge. One of the bubble membrane removing means physically applies an explosive force to the polymer foam and converts the independent foam membrane of the foam into open cell tissue of the muscle tissue. The other means of removing the bubble membrane is chemical means that converts the independent bubble into a continuous bubble structure with a strongly oxidizing liquid. Physical means are recommended because chemical means are more likely to cause water pollution. The base polymer can be selected as polyether, polyester or isocyanate to enhance the physical properties of the continuous foam sponge. Antioxidants and anti-aging agents can be added to enhance the aging characteristics. Several types of continuous bubble sponges are produced at home and abroad and can be purchased and used. In order to use the continuous bubble sponge among commercial products, it is necessary to apply a conductive film to the muscle tissue with a conductive silicone coating, and to select a continuous bubble sponge that can be easily installed with a lumen by a heating punch or cross-bonding of a mandrel and a roll tube. In the present invention, the density of the continuous bubble sponge may be 100 ppi (Pore per inch) ~ 5 ppi can be used, preferably 80 ppi ~ 20 ppi sponge. The cross-sectional diameter of the root tissue of the preferred continuous bubble sponge is 300 to 800 µm.

A conductive film continuous bubble sponge is produced by coating a conductive film on the root tissue of the continuous foam sponge which is an electrical insulator. The thickness of a conductive film can be 50-200 micrometers. When the silicone coating liquid for the conductive film composition is prepared, the coating liquid is impregnated into the continuous bubble sponge to cure the conductive coating film coated on the sponge muscle tissue. Silicone OH polymer (dimethyl silan diol) is recommended as the base polymer for conductive silicone coatings. Aminoxy siloxane can be used as a curing agent. As the adhesion imparting agent, a silane capping agent may be used. Hardeners include acetic acid, alcohols, oximes, amines, amido, aminoxy, acetone, dehydrogenated, dehydrated additives and the like. However, in this invention, a two-component type is recommended and aminox type hardener having good hydrolysis performance is recommended. . The silane coupling coupling agent may be representative such as amine, epoxy, vinyl, methacryl, mer kto, but amine-based silane coupling agent is recommended. Conductive (electrostatic) Furnace black, Acethylene black, Ketuchin black, Graphite, Metal oxides (SnO ₂ , ZnO, MgO, etc) and metals (Ag, CU, Au) , Fe, Ni, aluminum) may be used. Furnace black is recommended among these materials in consideration of the balance of physical properties. The viscosity modifier of the coating agent is selected from oil, plasticizer, and solvent. Antioxidants, antioxidants, pigments, etc. are used as additives for the coating.

The conductive film continuous bubble sponge is cut into a sponge block to install a mandrel, and a lumen is formed in the sponge block for insertion of the mandrel. First, the conductive film continuous foam sponge is installed into a core shaft and cut into a sponge block sized to be processed into a roll tube. When the final roll tube diameter is 17mm, length is 350mm Example sponge block size is 40mm × 40mm × 380mm.

Create a lumen for installing the mandrel in the center of the cut sponge block. The lumen can be drilled with a rubber mill or a heated punch. Hot melt continuous foam sponges can be drilled very efficiently when punched with a heated punch. If the diameter is 6mm, the tip is conical and the heat is punched into the sponge block with an electric heat punch heated to 220 ~ 700 ℃, the drilling time is about 0.5 ~ 1sec / EA. Gases generated during melt drilling are exhausted between the root tissues of the sponge, and the polymers in which the molten tissue is melted during the drilling are rearranged in the root tissues of the main surface of the punching space to prevent deformation of the sponge. Even if the continuous bubble sponge is drilled with a mill, the cutting chips are easily outgoing, so that the rapid cutting is performed without deformation.

Insert the mandrel into the sponge block in which the lumen is formed and cross-link and bond the fixed mandrel and the sponge block. As an example, a heat-curable TYPE adhesive made of Chemlock 205, 220 or Chemlock 807 silan coupling is applied to the main surface of a stainless steel mandrel having a diameter of 300 mm and a diameter of 7 mm and inserted into the lumen of the sponge block. Sponge block inserted into the mandrel is heated 130 ~ 160 ℃ / 15 minutes to cross-link the mandrel and the sponge block.

The spun-bonded sponge block is cut on the outer edge of the roll tube to meet the design specifications of the facsimile roll in a rubber lathe to obtain a finished toner supply roll.

Referring to the drawings of the embodiment, the continuous bubble sponge roll of the present invention is a hot melt continuous bubble sponge (11); A conductive film 12 applied to the heat-melt continuous bubble sponge muscle tissue to impart conductivity to the continuous bubble sponge; A core shaft installation lumen 21 formed by melt-punching a conductive film continuous bubble sponge with a heating punch 51 at 200 to 700 ° C. in the sponge block 11a; A mandrel 31 having a mandrel 31 inserted into the lumen 21 of the thermally soluble sponge block 11a, which is a conductive film continuous foam sponge, and a contact portion of the sponge and the mandrel with the adhesive layer 41; After installing and adhering the mandrel 31, the roll tube surface 13 was comprised by the roll tube 14 obtained by cutting.

The sponge block and the core layer adhesive layer 41 is a crosslinked adhesive layer by a thermosetting conductive adhesive 41a or a thermal welding adhesive layer by a conductive hot melt. The hot melt sponge block 11a is a sponge block 12 obtained by cutting an electro-static recticulated sponge into a size capable of processing the surface with a roll for toner supply. The continuous sponge block 11a can quickly puncture the lumen with a heating punch and also facilitate mechanical processing. The heat curable adhesive layer 41 is a conductive hot melt adhesive layer applied to the mandrel surface or the heat curable adhesive layer 41 is inserted into the lumen 21 and heated to 100 to 250 ° C. for crosslinking or heat fusion.

Example 1

A silicone coating agent for conductive film composition was prepared as follows.

Material weight ratio Note

OH polymer 100 Dimethyl silan diol

Aminoxy silan 5

Furnace black 40 X-72 Cabot corporation

Amino silan 2 Silan 1103

Toluene Proper Concentration Control

Example 2

In order to impart conductivity to the continuous foam sponge and to improve heat resistance, the continuous foam sponge was impregnated with the coating solution of Example 1, and the coating liquid was applied to the root tissue of the sponge, and dried for 15 to 25 minutes with hot air at 80 to 100 ° C. to the root tissue of the sponge. The coated conductive film was cured. The volume resistivity of the prepared conductive film continuous bubble sponge was 2 × 10 3 Ω. The prepared conductive film continuous bubble sponge was left at 180 ° C. for 48 hours, and there was no change in appearance and elasticity.

By controlling the amount of Furnace Black added in the coating agent of Example 1 it was possible to obtain a variety of conductivity (10³ ~ 10 ⁹ Ω).

Example 3

The conductive film continuous bubble sponge prepared in Example 2 was cut into a 40 mm × 40 mm × 380 mm sponge block in order to create a lumen for installing the mandrel with a heating punch in the sponge block. In the dedicated jig, a 6 mm diameter, 400 mm long, conical tip, and heat transfer punch heated to 220-700 ° C. was moved in the longitudinal direction from the center of the 40 mm × 40 mm area of the sponge block to melt perforation. The puncture time was 0.6-1 sec / EA. The perforated sponge melted and remained mostly in the form of a polymer film on the inner surface of the lumen, and no sponge crushing occurred during the perforation.

Example 4

The conductive film continuous bubble sponge prepared in Example 2 was cut into a 40 mm × 40 mm × 380 mm sponge block in order to create a lumen for installing the mandrel with a rubber cutting mill in the sponge block. In the rubber cutting mill, a cutter having a diameter of 6 mm and a length of 450 mm was moved in the longitudinal direction from the center of the 40 mm x 40 mm area of the sponge block to cut and puncture the lumen. Perforation time was around 12sec / EA.

Example 5

A sponge block having a lumen composition of Example 3 and a mandrel (stainless steel) having a diameter of 300 mm and a length of 7 mm were prepared, and a heat-curable TYPE thermosetting adhesive Chemlock 205 was applied to the main shaft surface and inserted into the lumen. The sponge block in which the mandrel was inserted was heated at 130 to 160 ° C / 15 minutes to cross-link the mandrel and the sponge block. The sponge block bonded to the mandrel was cut in a rubber lathe to meet the design specifications of the facsimile roll to prepare a toner supply roll.

Example 6

A sponge block having a lumen composition of Example 4 and a 400 mm long 6.5 mm diameter stainless steel core were prepared, and a tape type hot melt film having a thickness of 0.15 mm was wound around the main shaft surface to be in close contact with the core shaft and inserted into the lumen. The sponge block with the mandrel inserted was heated at 100 to 160 ° C./10 minutes to cross-link the mandrel and the sponge block. The toner supply rolls cited in Fig. 2 were manufactured by processing the roll surface 13 into pieces / 30 seconds so that the sponge blocks bonded with the cores were rolled into rubber rolls for printers to a roll tube diameter of 17 mm and a roll tube length of 350 mm.

As described above, the present invention proposes a continuous bubble sponge as a sponge for manufacturing a roll tube that can be melt-perforated quickly and at low cost by punching or a heating punch by cutting the steel composition for inserting a mandrel by a mill. Providing a coating liquid for forming a conductive film on the muscle tissue, forming a conductive film on the muscle tissue of the continuous bubble sponge, providing a conductive film continuous bubble sponge having a volume resistance of 10 ³ to 10 ⁹ Ω, and a contact portion between the roll tube and the core shaft of the conductive adhesive layer. A continuous film sponge roll bonded to the substrate is provided.

Claims (4)

A conductive film continuous bubble roll tube having a volume resistance of 10 ³ to 10 ⁹ Ω by applying a conductive film to the root tissue of the roll tube center lumen by coating a conductive film with a conductive silicone coating on the root tissue of the continuous bubble sponge; A lumen provided at the center of the conductive film continuous bubble roll tube; Continuous Bubble Sponge A continuous film sponge roll composed of a mandrel inserted into the lumen and bonded to the lumen. The method of claim 1, wherein the continuous bubble sponge is a heat-meltable sponge of 5 ~ 100ppi that can melt perforation of the lumen with a heating punch, the adhesive layer bonding the lumen and the mandrel is a conductive heat cured adhesive layer formed at 100 ℃ ~ 160 ℃ Conductive film continuous bubble sponge roll. After forming lumen in the sponge block, inserting the mandrel and attaching it, and processing the outer edge of the roll tube, impregnating and drying the continuous foam sponge with the conductive silicone coating solution to the root tissue of the sponge so that the volume resistance is 10 ³ to 10 ⁹ Ω. Coating a conductive film; Forming a core shaft installation lumen in the conductive film sponge foam block by either molten boring by a heating punch or cutting boring by a cutter; A method for manufacturing a conductive film continuous foam sponge roll comprising the step of adding a material for imparting a conductive adhesive layer to a main surface of a mandrel, inserting it into a lumen, and heating it to bond the lumen and a mandrel with a conductive adhesive layer. The method of claim 3, wherein the silicone coating agent for forming the conductive film is a base polymer and silan diol; A conductive film continuous bubble characterized by including at least one material selected from furnace black, acethylene black, ketchin black, graphite, metal oxides (SnO₂ etc) and metals (Ag, CU, Au, Fe, Ni, aluminum). Method for producing a sponge roll.

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