CN106094477B - Color developing roller and preparation method thereof - Google Patents
Color developing roller and preparation method thereof Download PDFInfo
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- CN106094477B CN106094477B CN201610630056.4A CN201610630056A CN106094477B CN 106094477 B CN106094477 B CN 106094477B CN 201610630056 A CN201610630056 A CN 201610630056A CN 106094477 B CN106094477 B CN 106094477B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0808—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer supplying means, e.g. structure of developer supply roller
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0818—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the structure of the donor member, e.g. surface properties
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- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
The invention relates to a color developing roller and a preparation method thereof. The color developing roller comprises a metal shaft center, conductive foam rubber sleeved outside the metal shaft center and a conductive dense rubber film sleeve sleeved outside the conductive foam rubber; the conductive dense rubber film sleeve and the conductive foamed rubber are integrally formed. The color developing roller has the advantages of good rebound resilience, strong wear resistance, good printing quality, low cost and the like, and can meet the same hardness requirement of the original rubber-filled roller; in addition, the preparation method of the invention does not need a spraying link, and the surface of the printing paper can be slightly carbonized under the irradiation of UV light to achieve excellent printing effect, thereby avoiding the pollution of spraying to the environment and the damage to personnel.
Description
Technical Field
The invention relates to a color developing roller suitable for the fields of printers, copiers and fax machines and a preparation method thereof, belonging to the technical field of electrostatic latent images.
Background
The developing roller is widely used in the fields of printers and copiers. The charging roller charges the photosensitive drum, forms an electrostatic latent image by exposure, then transfers carbon powder to the electrostatic latent image part on the photosensitive drum through the developing roller, and the carbon powder latent image is transferred to paper to be heated and shaped to form a final printed character image.
The existing developing roller is generally composed of an iron shaft center and conductive rubber which is sleeved outside the iron shaft center and tightly wrapped. Because the outside rubber layer of iron axle center is hard rubber, in order to improve the printing effect, need carry out spraying process after iron axle center and conductive rubber shaping to improve the smooth and the roughness on roller surface that charges, the production process of current developer roll promptly is: mixing rubber → compounding and extruding iron core and conductive rubber → vulcanizing → cutting → grinding → washing rubber roller → spraying → packaging. Because the spraying link is added in the production process, the environment and the human body are greatly damaged.
Disclosure of Invention
The invention aims to provide a color developing roller and a preparation method thereof. The color developing roller has the advantages of good rebound resilience, strong wear resistance, good printing quality, low cost and the like; in addition, the color developing roller does not need a spraying link in the preparation process, and the surface of the color developing roller can achieve excellent printing effect only by slight carbonization under the irradiation of UV light, thereby avoiding the environmental pollution and the injury to personnel in the spraying link.
In order to achieve the purpose, the invention adopts the following technical scheme:
a color developing roller is characterized by comprising a metal shaft center, conductive foam rubber sleeved outside the metal shaft center, and a conductive dense rubber film sleeve sleeved outside the conductive foam rubber; the conductive dense rubber film sleeve and the conductive foamed rubber are integrally formed.
By adopting the color developing roller with the structural characteristics, all parts cannot be loosened in the printing process, so that the printing quality is ensured; and the wear resistance is obviously enhanced, and the rubber has excellent resilience.
In the color developing roller, the conductive foamed rubber is prepared by mixing an A section material and a B section material according to the weight ratio of 100: 10-12 mixing to obtain the mixture;
the A-section material comprises conductive carbon black and ethylene propylene rubber, and the weight ratio of the conductive carbon black to the ethylene propylene rubber is 1: 4-6;
the B-stage material comprises an accelerator, a vulcanizing agent and a modified foaming agent, and the weight ratio of the sum of the accelerator and the vulcanizing agent to the modified foaming agent is 60-65: 100.
Due to the adoption of the special formula of the material in the A section and the material in the B section, excellent printing effect can be achieved as long as the surface of the material is slightly carbonized under the irradiation of UV light, a spraying link is not needed, and the pollution of spraying to the environment and the damage to personnel are avoided.
As one of the preferable embodiments of the invention, the A-stage material comprises the following components in parts by weight:
ethylene propylene rubber: 20 parts of (1);
conductive carbon black: 4 parts of a mixture;
paraffin oil: 8-9 parts;
active agent(s): 2-3 parts of a solvent;
filling agent: 7-10 parts.
In the color developing roller, the active agent is one or more of zinc oxide, polyethylene glycol and stearic acid, and preferably consists of the zinc oxide, the polyethylene glycol and the stearic acid in a weight ratio of 3.6-3.7:1: 1. Wherein, the zinc oxide is added to promote the vulcanization process, the polyethylene glycol is added to improve the smoothness of the foaming tube, and the stearic acid is added to facilitate extrusion during extrusion molding. The paraffin oil is added to reduce the viscosity of the rubber during rubber mixing, so that the mixing is easy to carry out, and the production efficiency is improved. The filler is used for filling and reducing the cost; the filler may be talc or calcium carbonate.
Further preferably, the section A material comprises the following components in parts by weight:
ethylene propylene rubber: 20 parts of (1);
conductive carbon black: 4 parts of a mixture;
paraffin oil: 9 parts of (1);
active agent(s): 2.48 parts;
filling agent: 8 parts.
Or the section A material comprises the following components in parts by weight:
ethylene propylene rubber: 20 parts of (1);
conductive carbon black: 4 parts of a mixture;
paraffin oil: 8 parts of a mixture;
active agent(s): 2 parts of (1);
filling agent: 7 parts.
The B-stage material comprises the following components in parts by weight:
modified foaming agent: 3.0-4.2 parts;
accelerator (b): 1.58-2.61 parts;
vulcanizing agent: 0.32 to 0.6 portion.
In the color developing roller, the accelerator is selected from one or more of an accelerator EZ, an accelerator BZ and an accelerator TT, and preferably the accelerator EZ, the accelerator BZ and the accelerator TT are mixed in a weight ratio of 1-1.3: a composition of 0.9-1:1, particularly preferably a composition of 5:4:4 or 1:0.9: 1. The accelerator is added to effectively prevent the blooming phenomenon during printing.
The modified foaming agent is one or more of baking soda, azodicarbonamide (foaming agent AC), alum and urea, and preferably consists of the baking soda, the foaming agent AC-2000, the alum and the urea in parts by weight of 1:1-1.2:0.6-0.7: 0.8-1; particularly preferably 8: 9: 5: 8 or 1:1:0.7: 0.8.
The vulcanizing agent is a double-vulcanizing system, preferably a double-vulcanizing system consisting of dicumyl peroxide (a vulcanizing agent DCP) and an S vulcanizing system. Two different vulcanizing agents participate in a cross-linked rubber vulcanization system to obtain better vulcanization effect.
Further, the B-stage material comprises the following components in parts by weight:
modified foaming agent: 3.5 parts;
accelerator (b): 1.75 parts;
vulcanizing agent: 0.44 part;
or the B-stage material comprises the following components in parts by weight:
modified foaming agent: 3 parts of a mixture;
accelerator (b): 1.58 parts;
vulcanizing agent: 0.32 part.
In the color developing roller, the metal shaft center is made of 1215 free-cutting iron material, and the material has the greatest advantages of difficult deformation and easy processing. The conductive dense rubber membrane sleeve is made of epichlorohydrin rubber (ECO) or Nitrile Butadiene Rubber (NBR) materials.
The invention also provides a preparation method of the color developing roller, which comprises the following steps:
(1) preparing conductive foamed rubber: the section A material is subjected to banburying and open milling and then compounded with the metal axis for extrusion molding, so that the conductive foamed rubber is formed outside the metal axis;
(2) and (3) vulcanization molding: and cutting off redundant conductive foamed rubber on the metal shaft center, sleeving a conductive dense rubber film sleeve outside the conductive foamed rubber, integrally placing the conductive dense rubber film sleeve into a mold, and performing vulcanization molding to obtain the color developing roller.
And (3) subsequent treatment: and cutting the obtained color developing roller according to the required size, and carrying out performance detection on the color developing roller.
In the above method for manufacturing a color developing roller, in the step (1), the conditions of the banburying step are as follows: the temperature is 160-180 ℃, and the time is 15-25 min; the temperature of the composite extrusion molding process is 55-75 ℃; preferably, the temperature of the composite extrusion molding process is controlled by three sections, which are respectively: 60 ℃, 70 ℃ and 70 ℃. The temperature at the rear ends is the same so that the sizing material has a smooth preheating process.
In the above method for manufacturing a color developing roller, in the step (2), the conditions of the vulcanization molding step are as follows: the temperature is 190-210 ℃, and the time is 50-70 min.
As one of the preferable embodiments of the preparation method of the invention, the method comprises the following steps:
(1) preparing conductive foamed rubber: the section A material is subjected to banburying and open milling and then compounded with the metal axis for extrusion molding, so that the conductive foamed rubber is formed outside the metal axis;
(2) and (3) vulcanization molding: cutting off redundant conductive foamed rubber on the metal shaft center, sleeving a conductive dense rubber film on the outer part of the conductive foamed rubber, integrally placing the conductive dense rubber film in a mold, and performing vulcanization molding to obtain a color developing roller;
in the step (1), the conditions of the banburying process are as follows: the temperature is 160-180 ℃, and the time is 15-25 min;
the temperature of the composite extrusion molding process is 55-75 ℃; preferably, the temperature of the composite extrusion molding process is controlled by three sections, which are respectively: 60 ℃, 70 ℃ and 70 ℃;
in the step (2), the conditions of the vulcanization molding process are as follows: the temperature is 190-210 ℃, and the time is 50-70 min.
The scheme of the invention has the following beneficial effects:
(1) the color developing roller is characterized in that a conductive dense rubber film sleeve is sleeved outside conductive foamed rubber, the conductive dense rubber film sleeve and the conductive foamed rubber are integrally formed, and in the vulcanization process, the conductive foamed rubber is foamed inside the conductive dense rubber film sleeve, and the conductive dense rubber film sleeve and the conductive foamed rubber are tightly attached, so that the conductive dense rubber film sleeve and the conductive foamed rubber are not loosened in the printing process, and the printing quality is ensured;
(2) the conductive dense rubber film sleeve is additionally arranged outside the conductive rubber, so that the wear resistance of the color developing roller is obviously improved;
(3) because the invention adopts the special formula of the A-section material and the B-section material and the specific preparation process, the excellent printing effect can be completed only by slightly carbonizing the surface of the material under the irradiation of UV light, and the spraying link is not needed, thereby avoiding the pollution of the spraying to the environment and the injury to personnel;
(4) the color developing roller of the invention adopts the combination of the solid gum and the foaming gum, and has the advantages that: the used foaming sizing material is less, so that the production cost can be greatly reduced; the used foaming rubber material can effectively reduce the hardness of the product, thereby achieving the same hardness requirement as the original rubber roller; in addition, the conductive foamed rubber adopts conductive ethylene propylene rubber and a specific B-section material which are matched according to a specific proportion, so that the rebound resilience of the color developing roller can be effectively improved.
(5) The preparation method of the color developing roller simplifies the working procedures, improves the production efficiency, effectively reduces the cost (can reduce the cost by 50 percent), improves the printing performance, and has the production efficiency at least 3 times of that of the prior equipment and process.
Drawings
FIG. 1 is a production flow chart of a color developing roller obtained by the present invention.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
EXAMPLE 1A color developing roller
The embodiment provides a color developing roller, which comprises an iron shaft center (1215 of an easy-cutting iron material), conductive foam rubber sleeved outside the metal shaft center, and a conductive dense rubber film sleeve sleeved outside the conductive foam rubber; the conductive dense rubber film sleeve and the conductive foamed rubber are integrally formed.
The conductive foamed rubber is prepared from a material in an A section and a material in a B section in a weight ratio of 100: 10 mixing to obtain the final product; the formulation table is as follows (parts by weight):
TABLE 1 ingredient table of A section materials each component content
The active agent is prepared from the following components in parts by weight: zinc oxide (1.6 parts), polyethylene glycol (0.44 parts), and stearic acid (0.44 parts).
TABLE 2 ingredient table of B-stage material each component content
The modified foaming agent is prepared from baking soda, a foaming agent AC-2000, alum and urea in a weight ratio of 8: 9: 5: 8, preparing a mixture; the baking soda belongs to a low-temperature foaming agent, so that the sponge rubber can be firstly foamed to form perforated sponge; the AC-2000 gas forming amount is larger, so that the hardness of the sponge can be reduced; and the alum and the urea can effectively reduce the foaming temperature and increase the gas forming amount. Through the interaction of the three components, the obtained modified foaming agent has better effect.
The accelerant is prepared from the following components in parts by weight: accelerator EZ (0.5 part), accelerator BZ (0.4 part) and accelerator TT (0.4 part).
The vulcanizing agent consists of a double-vulcanization system S (0.8 part by weight) and DCP (0.28 part by weight), and can effectively increase the crosslinking degree of rubber, so that different types of rubber are more fully crosslinked, and the rubber has better resilience.
The conductive dense rubber membrane sleeve is made of epichlorohydrin rubber (ECO) or Nitrile Butadiene Rubber (NBR) materials.
EXAMPLE 2A color developing roller
The present embodiment provides a color developing roller, which is different from embodiment 1 in that:
TABLE 3 ingredient table of section A materials the contents of the components (parts by weight)
TABLE 4 ingredient table of B-stage material the contents of the components (parts by weight)
The modified foaming agent is prepared from the following components in parts by weight: baking soda (1 part), foaming agent AC-2000(1 part), alum (0.7 part) and urea (0.8 part);
the accelerant is prepared from the following components in parts by weight: accelerator EZ (0.5 part), accelerator BZ (0.45 part) and accelerator TT (0.5 part);
compared with the color developing roller in the embodiment 1, the color developing roller has the advantages that the vulcanizing speed is higher, the vulcanizing is more sufficient, and the density and the hardness of rubber materials can be reduced due to more foaming agents, so that a better printing effect is achieved.
EXAMPLE 3 method for producing color developing roller
The invention also provides a preparation method of the color developing roller in the embodiment 1, which comprises the following steps (the production flow chart is shown in figure 1):
(1) preparing conductive foamed rubber: the section A material is subjected to banburying and open milling and then compounded with the metal axis for extrusion molding, so that the conductive foamed rubber is formed outside the metal axis;
(2) and (3) vulcanization molding: cutting off redundant conductive foamed rubber on the metal shaft center, sleeving a conductive dense rubber film on the outer part of the conductive foamed rubber, integrally placing the conductive dense rubber film in a mold, and performing vulcanization molding to obtain a color developing roller;
and (3) subsequent treatment: and cutting the obtained color developing roller according to the required size, and carrying out performance detection on the color developing roller.
In the above method for manufacturing a color developing roller, in step (1), the banburying conditions are as follows: the banburying temperature is 170 ℃, and the banburying time is 20 min.
In the preparation method of the color developing roller, in the step (1), the composite extrusion molding temperature is 55-75 ℃; preferably, the extrusion temperature control is divided into three sections: 60 ℃, 70 ℃ and 70 ℃.
In the preparation method of the color developing roller, in the step (2), the vulcanization molding temperature is 200 ℃ and the time is 60 min.
The color developing roller described in example 2 can also be prepared by the same method.
Effect verification
In order to further verify the difference between the color developing roller of the present invention and the existing color developing roller, the color developing rollers obtained in examples 1 and 2 were subjected to performance comparison tests with the existing color developing roller.
The existing color developing roller is composed of an iron axis and hard conductive rubber sleeved outside the iron axis. Wherein the hard conductive rubber is prepared from the following components in parts by weight (namely, only the A-stage material formula of the example 1 is used): ethylene propylene rubber: 20 parts of (1); conductive carbon black: 4 parts of a mixture; paraffin oil: 8 parts of a mixture; active agent(s): 2 parts of (1); filling agent: 7 parts.
Table 5 the results of the experiment are as follows:
as can be seen from Table 5, (1) the color developing roller manufactured by the scheme of the invention cannot loosen in the printing process, so that the printing quality is ensured; (2) conductive ethylene propylene rubber and a specific B-section material are adopted to be matched according to a specific proportion, so that the rebound resilience of the color developing roller can be effectively improved; (3) the color developing roller does not need a spraying environment in the preparation process, so that the pollution of spraying to the environment and the injury to personnel are avoided; (4) the wear-resisting property of the color developing roller obtained by the invention is obviously improved because the conductive dense rubber film sleeve is additionally arranged outside the conductive rubber.
In addition, through accounting, the color developing roller of the invention uses less foaming sizing material, the cost is reduced by at least 50%, and the production efficiency is improved by at least 3 times of the original equipment and process.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. A color developing roller is characterized by comprising a metal shaft center, conductive foam rubber sleeved outside the metal shaft center, and a conductive dense rubber film sleeve sleeved outside the conductive foam rubber; the conductive dense rubber film sleeve and the conductive foamed rubber are integrally formed;
the conductive foamed rubber is prepared from a material in an A section and a material in a B section in a weight ratio of 100: 10-12 mixing to obtain the mixture; wherein the content of the first and second substances,
the A-section material comprises the following components in parts by weight: ethylene propylene rubber: 20 parts of (1);
conductive carbon black: 4 parts of a mixture;
paraffin oil: 8-9 parts;
active agent(s): 2-3 parts of a solvent;
filling agent: 7 to 10 portions of
The B-stage material comprises the following components in parts by weight:
modified foaming agent: 3.0-4.2 parts;
accelerator (b): 1.58-2.61 parts;
vulcanizing agent: 0.32-0.6 part; the weight ratio of the sum of the accelerator and the vulcanizing agent to the modified foaming agent is 60-65: 100;
the accelerator is composed of an accelerator EZ, an accelerator BZ and an accelerator TT according to the weight parts of 1-1.3: 0.9-1: 1;
the modified foaming agent consists of baking soda, a foaming agent AC-2000, alum and urea in a weight ratio of 1:1-1.2:0.6-0.7: 0.8-1;
the vulcanizing agent is a double-vulcanizing system consisting of dicumyl peroxide and an S vulcanizing system.
2. The color developing roller according to claim 1, wherein the activator is one or more of zinc oxide, polyethylene glycol, stearic acid; the filler is talcum powder or activated calcium.
3. The color developing roller according to claim 2, wherein the activator is composed of zinc oxide, polyethylene glycol and stearic acid in parts by weight of 3.6-3.7:1: 1.
4. The method for manufacturing a color developing roller according to any one of claims 1 to 3, comprising the steps of:
(1) preparing conductive foamed rubber: the section A material is subjected to banburying and open milling and then compounded with the metal axis for extrusion molding, so that the conductive foamed rubber is formed outside the metal axis;
(2) and (3) vulcanization molding: and cutting off redundant conductive foamed rubber on the metal shaft center, sleeving a conductive dense rubber film sleeve outside the conductive foamed rubber, integrally placing the conductive dense rubber film sleeve into a mold, and performing vulcanization molding to obtain the color developing roller.
5. The method according to claim 4, wherein in the step (1), the conditions of the banburying process are as follows: the temperature is 160-180 ℃, and the time is 15-25 min;
the temperature of the composite extrusion molding process is 55-75 ℃.
6. The method according to claim 5, wherein the temperature of the co-extrusion molding process is controlled in three stages, which are: 60 ℃, 70 ℃ and 70 ℃.
7. The production method according to claim 6, wherein in the step (2), the conditions of the vulcanization molding process are as follows: the temperature is 190-210 ℃, and the time is 50-70 min.
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| CN108659444B (en) * | 2018-05-21 | 2020-10-23 | 广州华新科智造技术有限公司 | Developing roller material and preparation method thereof |
| CN112961442A (en) * | 2021-02-07 | 2021-06-15 | 河南绿色快车橡塑制品有限公司 | High-flexibility charging roller foaming sleeve, preparation method thereof and high-flexibility charging roller |
| CN112976728B (en) * | 2021-02-07 | 2023-09-26 | 河南绿色快车橡塑制品有限公司 | Rubber sleeve for composite charging roller, preparation method of rubber sleeve and composite charging roller |
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