KR200375301Y1 - Electro-static sponge roll - Google Patents

Abstract

The present invention is a roll tube formed by installing a core shaft to a heat-melting sponge block imparting chargeability and then forming a roll surface; A core shaft installation lumen formed by melting and punching a heat-melting sponge block to which charge is imparted with a heating punch at 200 to 500 ° C .; A mandrel inserted into the lumen and crosslinked or thermally bonded to the lumen; Provided is a chargeable sponge roll comprising a heat curable adhesive layer or a conductive hot melt adhesive layer formed on the main shaft surface and inserted into the lumen and then adhesively fixing the lumen and the mandrel. According to the present invention, a roll tube sponge of a toner supply roll is prepared based on TPE or plastics; Heat-bonding the roll tube and the mandrel (partially crosslinked), and providing a large amount of conductivity imparting agent to the roll tube sponge to provide a chargeable sponge for toner supply having a volume resistance of 10 ³ to 10 ⁹ Ω; Using a heating punch to quickly drill the mandrel insertion lumen into the sponge block for the roll tube at low cost; The present invention provides a technique for crosslinking or thermally bonding a mandrel to a chargeable sponge by inserting a mandrel provided with a conductive hot melt film or a thermosetting adhesive film on a main surface thereof and then heating the mandrel.

Description

Electrostatic Sponge Roll {Electro-static sponge roll}

The present invention is to provide a chargeable sponge roll.

Includes document (printing) features, such as inkjet printers, laser printers, and fax machines. The paper or toner supply rolls installed in these apparatuses have a mandrel for roll-driving to a central lumen 2 of a rubber or polyurethane foam roll tube 1, which is a thermosetting resin, as cited in FIG. It is the structure which cut and fitted 3) and cut | disconnected the surface 1a of the roll tube 1 to roll specification. Conventionally, the material of the roll tube has a heavy product weight and a high product price when solid silicon is used as the material of the roll tube. The conventional toner supply roll has a problem that toner is agglomerated and supplied at the time of toner feeding. The material of the roll tube is a thermosetting resin, and this property is very difficult because the lumen machining for mandrel installation in the roll tube is restricted by punching or cutting drilling. In particular, the conventional toner supply roll uses rubber or polyurethan sponge, and these thermosetting resins cannot be processed by a hot wire or stick proposed in the present invention. Special PU sponges are capable of high frequency processing but are difficult to use because they require the formation of special compounds.

The conventional toner supply roll is a factor of lowering productivity since the adhesive is applied to the mandrel and inserted into the tube lumen for crosslinking when the mandrel is attached to the lumen. When the polyurethane foam (Polyurethane foam) is used as the material of the roll tube, the heterogeneity of the foam cell (cell) has been investigated. The roll tube materials involve technical difficulties in making the roll tube into a sponge having an electrical property of 10 ⁵ Ω or less when made from a chargeable sponge. Inhomogeneity of the sponge cells in the toner supply roll deteriorates the print quality because the supply of the toner appears uneven.

As mentioned above, toner supply rolls for office equipment printing devices such as laser printers and fax machines are important components that influence printing quality. Until now, silicone toner supply rolls (rubber rolls) and polyurethane sponges have been used, but these toner supply rolls have been used. As the price of silver was high, print quality problems were raised due to uneven sponge cell. At the request of the industry, there was a request for the development of a toner supply roll using TPE or a thermoplastic sponge, which is easy to manufacture and inexpensive, but proper electrical characteristics (volume resistance) and the bonding technology of the mandrel and the roll tube remained a challenge.

The present invention provides a technique for quickly drilling a mandrel insertion lumen with a heating punch and bonding a roll tube and a mandrel with a conductive hot melt adhesive under the above technical environment, and bonding the roll tube and mandrel by partially crosslinking the TPE. It is to provide a toner supply roll with a large amount of conductive imparting filler (filler) and good volume resistance characteristics.

The present invention seeks to provide a chargeable sponge roll based on TPE or plastics on the roll tube sponge of the toner supply roll.

The present invention provides a chargeable sponge roll having good volume resistance characteristics by partially crosslinking the roll tube and the mandrel (crosslinking only the contact portion between the lumen and the mandrel) and incorporating a large amount of conductive filler into the roll tube sponge. I will.

The present invention aims to provide an electro-static sponge or electrification sponge roll for toner supply having a volume resistance of 10 ³ to 10 ⁹ Ω.

The present invention seeks to provide a chargeable sponge roll in which a mandrel insertion lumen is rapidly drilled at low cost on a roll tube sponge block using a hot wire or stick.

The present invention drills the lumen into the chargeable sponge block, inserts the mandrel with the conductive hot melt film applied to the main surface, and heats the mandrel to cross-link or heat-bond the chargeable sponge, and cut the sponge to which the mandrel is attached to the main surface of the roll. It is to provide a chargeable sponge roll to form.

1 is a manufacturing process diagram of the present invention

Figure 2 is a plan view of the toner supply roll of the present invention manufactured in the embodiment

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

<Description of Major Reference Drawings>

11 is a roll tube; 13 is a roll surface; 12 is a sponge block; 21 is lumen; 31 is a mandrel; 41 is an adhesive layer; 51 is a heating punch; 42 is an adhesive layer (conductive hot melt adhesive layer or thermosetting adhesive layer)

The present invention will be described in detail with reference to the accompanying drawings.

The toner supply roll of the present invention comprises a roll tube (11) given by arranging and attaching a mandrel to a heat-melting sponge block (12) to which charge is imparted, and forming a roll surface (13);

A core installation lumen 21 formed by melt-punching into the heat-melting sponge block to which charge was provided by the 200-500 degreeC heating punch 51;

A core shaft 31 inserted into the lumen 21 and crosslinked and thermally bonded to the lumen 21 (including conductive bonding);

It was composed of a heat curable adhesive layer or a conductive hot melt adhesive layer 41 formed on the main surface of the mandrel 31 and inserted into the lumen 21 to bond the lumen and the mandrel.

The hot melt sponge block 12 is a sheet of any one of an electro-static plastic sponge sheet, a chargeable thermoplastic elastomer (TPE) foam sheet, and a chargeable thermo plastic urethane (TPU) foam sheet. Is a sponge block 12 cut to a size such that the surface can be processed with a toner supply roll.

The hot melt sponge block 12 can be used to quickly puncture the lumen with a heating punch, and uses a sponge block having a hardness of 5 to 50 / Shore-C to minimize deformation during the drilling process.

The thermosetting adhesive layer 41 was inserted into the inner lumen 21 by inserting a conductive hot melt adhesive layer or a thermally curable adhesive layer 42 applied to the mandrel surface, and heated to 120 to 250 ° C. for crosslinking or thermal adhesive bonding.

The inventive chargeable sponge roll includes a base polymer; Preparing a chargeable plastic sponge sheet by mixing a conductivity-imparting agent, a viscosity control agent, and a blowing agent in an appropriate amount and foaming in a container;

Cutting the chargeable sheet into a sponge block and forming a lumen insertion by a heating punch;

Providing a conductive hot melt adhesive layer or a thermosetting adhesive layer on the main surface of the mandrel;

And inserting the mandrel provided with the conductive hot melt adhesive layer into the lumen and heating to crosslink or heat bond the mandrel and lumen.

Preparation of Electro-static Plastics Sponge Sheets

The plastic sponge of the present invention including the properties of TPE (thermoplastic elastomer) includes a base polymer; An electrically conductive imparting agent, a viscosity modifier, and a blowing agent are mixed in an appropriate amount and foamed in a container to prepare a chargeable plastic sponge sheet.

In preparing the chargeable plastic sponge sheet, general antioxidants, antioxidants and coloring agents may be added to the material composition to enhance the physical properties of the sponge.

The base polymer is selected from SiStyrene vinylisoprene styrene (SVPS), Sithrene isoprene styrene (SIS), styrene block copolymer (SEPS, SEBS, SEEPS), polyethylene (PE), Thermo plastic elastomer (TPE), and thermoplastic blend compound.

The conductive agent is selected from furnace black, acethylene black, ketchin black, graphite, metal oxides (SnO ₂ , ZnO, MgO, etc) and metals (Ag, CU, Au, Fe, Ni, aluminum).

Viscosity modifier is selected from oil and plasticizer.

The blowing agent is selected from organic chemical blowing agents (which generate CO ₂ , N ₂ and hydrogen gas such as DPT, AC, etc.) and inorganic chemical blowing agents (NaHCO ₃ , MgHCO _3, etc.).

Other additives include antioxidants, antioxidants and pigments.

The chargeable plastic sponge can also be produced by the base polymer polyurethane TPU (Thermo plastic urethane).

The present invention is as follows.

Example 1.

The following materials were mixed and foam cured in a container to prepare a chargeable plastic sponge sheet.

SIS 100 parts by weight;

10 parts by weight of SEBS;

2 parts by weight of zinc oxide (ZnO);

0.3 part by weight of stearic acid;

Furnace black 60 parts by weight;

Process oil 60 parts by weight;

12 parts by weight of Azodicarbon amide;

1 part by weight of Peroxide;

Total 245.3 parts by weight;

Property measurement

Volume resistivity of sponge sheet: 10 ⁵ Ω

Specific gravity of sponge sheet: 0.15

Example 2.

The following materials were mixed and foam cured in a container to prepare a chargeable plastic sponge sheet.

SIS 70 parts by weight;

30 parts by weight of EVA (Ethylene vinyl acetate);

ZnO 2 parts by weight;

0.3 part by weight of stearic acid;

Furnace black 50 parts by weight;

Process oil 45 parts by weight;

10 parts by weight of Azodicarbon amide;

1 part by weight of Peroxide;

Total 238.1 parts by weight;

Property measurement

Volume resistivity of sponge sheet: 10 ⁶ Ω

Specific gravity of sponge sheet: 0.23

Example 3.

Adhesive Use Process

Using the chargeable sponge sheet and the mandrel prepared in Example 1, a toner supply roll was prepared as follows.

The chargeable sponge sheets were cut into sponge blocks of 40 mm x 40 mm x 380 mm, the size of which can be processed into roll tubes.

The lumen was melt-drilled in a dedicated jig with a 6 mm diameter, conical tip and heated to 220 ° C. Punch time was dog / 0.7 seconds.

Thermoset adhesives (Chemlock 205, 220 or Chemlock 807 silan coupling products, heat-hardening type) were applied to the main shaft surface with a diameter of 300 mm and a diameter of 7 mm 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 on a rubber lathe according to the design specification of the facsimile roll to prepare a toner supply roll.

Example 4.

Hot Melt Film Application Process

The chargeable sponge sheet was cut into 40 mm x 40 mm x 400 mm sponge blocks, which can be processed into roll tubes.

The lumen was melt-drilled into the sponge block in a dedicated jig with a heat transfer punch heated to 220 ° C. with a diameter of 5.5 mm, a length of 450 mm, and a tip of a cone. Punch time was dog / 0.7 seconds.

A tape-type hot melt layer having a thickness of 0.15 mm was closely adhered to a axial main surface having a length of 300 mm, a diameter of 6.5 mm, and a length of 400 mm, and inserted into the lumen.

Processing Characteristics by Heating Punch: Perforated sponge was melted and remained mostly in the form of a polymer film on the inner surface of the lumen, and almost no sponge crushing occurred during drilling.

The sponge block into which the mandrel was inserted was heated at 100-150 ° C./10 minutes to cross-link the mandrel and the sponge block.

The toner supply rolls quoted in Fig. 2 were prepared by processing the sponge block bonded to the mandrel to a roll roll for printers in rubber milling to a roll tube diameter of 17 mm and a roll tube length of 350 mm in 30 seconds.

As described above, the present invention provides a chargeable sponge roll based on TPE or plastics in a roll tube sponge of a toner supply roll; Providing a chargeable sponge roll that partially cross-links the roll tube and the mandrel and enables the use of a large amount of conductivity imparting agent to the roll tube sponge; Providing an electro-static sponge or electrification sponge roll for toner supply having a volume resistance of 10 ³ to 10 ⁹ Ω; Providing a chargeable sponge roll that uses a hot wire or stick to quickly perforate the lumen for axle insertion into the sponge block for the roll tube at low cost; A chargeable sponge roll that drills lumen into the chargeable sponge block and inserts a mandrel with a hot melt film applied to the main surface, and then heats to cross-bond the mandrel to the chargeable sponge, and cuts the mandrel-bonded sponge to form a main surface of the roll. To provide.

Claims (2)

In forming the roll tube central lumen and inserting the core shaft, A roll tube formed by attaching a mandrel to a thermally meltable sponge block to which charge is imparted, and forming a roll surface; A core shaft installation lumen formed by melting and punching a heat-melting sponge block to which charge is imparted with a heating punch at 200 to 500 ° C .; A mandrel inserted into the lumen and adhered to the lumen by any one of crosslinking and thermal bonding; A chargeable sponge roll comprising any one of a conductive hot melt adhesive layer and a heat curable adhesive layer formed on a main axis of the core and inserted into the lumen and then adhesively fixing the lumen and the mandrel. 2. The thermally meltable sponge block of claim 1, wherein the thermally meltable sponge block supplies a sheet of any one of an electro-static plastic sponge sheet, a chargeable thermoplastic elastomer (TPE) foam sheet, and a chargeable TPU foam sheet. A sponge block cut to a size capable of processing the surface with a roll; The hot melt sponge block is a sponge block having a hardness of 5 to 50 / Shore-C so as to quickly puncture the lumen with a heating punch and minimize deformation in the drilling process; The thermosetting adhesive layer is an electrostatic sponge roll obtained by inserting either a hot melt adhesive layer or a thermosetting adhesive layer applied to a mandrel surface into the lumen and then crosslinking by heating to 80 to 250 ° C.