CN110877424A - Method for manufacturing silicon rubber - Google Patents
Method for manufacturing silicon rubber Download PDFInfo
- Publication number
- CN110877424A CN110877424A CN201911133753.9A CN201911133753A CN110877424A CN 110877424 A CN110877424 A CN 110877424A CN 201911133753 A CN201911133753 A CN 201911133753A CN 110877424 A CN110877424 A CN 110877424A
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- CN
- China
- Prior art keywords
- conductive medium
- silicone rubber
- silicon rubber
- silver
- magnetic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5808—Measuring, controlling or regulating pressure or compressing force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5816—Measuring, controlling or regulating temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a method for manufacturing silicon rubber, which is implemented according to the following steps: step 1, mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roller open mill for 1-2 hours at the temperature of 100-130 ℃; 2, placing the mixed composite material in the step 1 in a flat vulcanizing machine, and carrying out compression molding at 90-170 ℃ and 6-18 MPa, wherein the conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the silicon rubber matrix comprises: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 1-10: 100-400: 80-200, the problem that the silicon rubber manufactured in the prior art is poor in electromagnetic shielding capacity is solved.
Description
Technical Field
The invention belongs to the technical field of processing and forming of silicon rubber, and relates to a manufacturing method of silicon rubber.
Background
Silicone rubber refers to rubber having a backbone composed of alternating silicon and oxygen atoms, with the silicon atoms typically having two organic groups attached to them. Conventional silicone rubbers consist predominantly of siloxane segments containing methyl groups and small amounts of vinyl groups. The introduction of phenyl can improve the high and low temperature resistance of the silicone rubber, and the introduction of trifluoropropyl and cyano can improve the temperature resistance and oil resistance of the silicone rubber. The silicon rubber has good low-temperature resistance and can still work at the temperature of minus 55 ℃. After the introduction of phenyl, a temperature of-73 ℃ can be reached. The silicon rubber has outstanding heat resistance, can work for a long time at 180 ℃, can still have elasticity for a plurality of weeks or more even at the temperature slightly higher than 200 ℃, and can instantaneously resist the high temperature of more than 300 ℃. Silicone rubber has good gas permeability, and oxygen transmission rate is the highest among synthetic polymers.
With the large-scale application of ultrahigh voltage and extra-high voltage power transmission and the popularization of intelligent power transmission and transformation technologies of power grids in China, the power transmission voltage level of the power grids is continuously improved, and the problem of electromagnetic interference in transformer substations/converter stations is increasingly prominent. Thus, in a limited space environment, attention has been paid to how to achieve effective shielding and compatibility between primary and secondary systems. Secondary equipment such as protection and control and the like is in a more severe electromagnetic environment, and increasingly higher requirements are put on electromagnetic compatibility, particularly suppression of electromagnetic interference. The existing silicon rubber manufacturing method mainly uses metal as an important filler of the high-conductivity silicon rubber, but the silicon rubber has poor interface compatibility with metal conductive and magnetic conductive powder and poor electromagnetic shielding capability.
Disclosure of Invention
The invention aims to provide a method for manufacturing silicon rubber, which solves the problem that the silicon rubber manufactured in the prior art has poor electromagnetic shielding capability.
The invention adopts the technical scheme that the method for manufacturing the silicon rubber is implemented according to the following steps:
step 1, mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roller open mill for 0.5-3 h at the temperature of 90-150 ℃;
and 2, performing compression molding on the composite material mixed in the step 1 at the temperature of 80-150 ℃ under the pressure of 9-20 MPa.
The conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the silicon rubber matrix comprises: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 1-10: 100-400: 80-200.
The invention is also characterized in that:
the silicone rubber substrate includes: hydroxyl silicone rubber, vinyl silicone rubber and alkoxy silicone rubber.
The crosslinking agent comprises: isocyanate, organic peroxide and aliphatic azo compound.
The particle size of the silver-plated nickel powder is 1-6 mu m, and the thickness of the plating layer is 1-6 mu m.
The particle size of the silver-plated copper powder is 1-12 μm, and the thickness of the plating layer is 1-7 μm.
The invention has the beneficial effects that: the invention relates to a method for manufacturing silicon rubber, which solves the problem of poor electromagnetic shielding capability of the silicon rubber manufactured in the prior art, adopts an open mill for mixing, fully mixes metal powder in the silicon rubber, and then prepares a finished product through compression molding, so that the metal powder can be uniformly dispersed and not separated out, and the method has incomparable advantages in the aspects of reducing material consumption, simplifying production process, reducing manufacturing and assembling cost, meeting strict assembly space limitation, improving production efficiency, improving cost performance of products and the like.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to a method for manufacturing silicon rubber, which is implemented according to the following steps:
step 1, mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roller open mill for 0.5-3 h at the temperature of 90-150 ℃;
and 2, performing compression molding on the composite material mixed in the step 1 at the temperature of 80-150 ℃ under the pressure of 9-20 MPa.
Wherein, the conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; silicon rubber matrix: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 1-10: 100-400: 80-200, the silicon rubber substrate comprises: hydroxyl silicone rubber, vinyl silicone rubber and alkoxy silicone rubber, wherein the cross-linking agent comprises: isocyanate, organic peroxide and aliphatic azo compound, wherein the particle size of silver-plated nickel powder is 1-6 mu m, the thickness of a plating layer is 1-6 mu m, the particle size of silver-plated copper powder is 1-12 mu m, and the thickness of the plating layer is 1-7 mu m.
Example 1
Mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roll mill for 0.5 at the temperature of 90 ℃; the mixed composite material is molded under the conditions of 80 ℃ and 9MPa, wherein the conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the silicon rubber matrix comprises: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 1: 100: 80, the silicone rubber matrix comprises: hydroxyl silicone rubber, vinyl silicone rubber and alkoxy silicone rubber, wherein the cross-linking agent comprises: isocyanate, organic peroxide and aliphatic azo compound, wherein the particle size of the silver-plated nickel powder is 1 mu m, the thickness of a plating layer is 1 mu m, the particle size of the silver-plated copper powder is 1 mu m, and the thickness of the plating layer is 1 mu m.
Example 2
Mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roll mill for 3 hours at the temperature of 150 ℃; the mixed composite material is molded under the conditions of 150 ℃ and 20MPa, wherein the conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the silicon rubber matrix comprises: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 10: 400: 200, the silicone rubber matrix comprises: hydroxyl silicone rubber, vinyl silicone rubber and alkoxy silicone rubber, wherein the cross-linking agent comprises: isocyanate, organic peroxide and aliphatic azo compound, wherein the particle size of the silver-plated nickel powder is 6 mu m, the thickness of a plating layer is 6 mu m, the particle size of the silver-plated copper powder is 12 mu m, and the thickness of the plating layer is 7 mu m.
Example 3
Mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roll mill for 1 hour at the temperature of 100 ℃; the mixed composite material is molded under the conditions of 130 ℃ and 15MPa, wherein the conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the silicon rubber matrix comprises: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 5: 200: 150, the silicone rubber matrix comprises: hydroxyl silicone rubber, vinyl silicone rubber and alkoxy silicone rubber, wherein the cross-linking agent comprises: isocyanate, organic peroxide and aliphatic azo compound, wherein the particle size of the silver-plated nickel powder is 5 mu m, the thickness of a plating layer is 4 mu m, the particle size of the silver-plated copper powder is 8 mu m, and the thickness of the plating layer is 5 mu m.
Example 4
Mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roll mill for 1 hour at the temperature of 120 ℃; the mixed composite material is molded under the conditions of 130 ℃ and 18MPa, wherein the conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the silicon rubber matrix comprises: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 6: 300: 160, the silicone rubber matrix includes: hydroxyl silicone rubber, vinyl silicone rubber and alkoxy silicone rubber, wherein the cross-linking agent comprises: isocyanate, organic peroxide and aliphatic azo compound, wherein the particle size of the silver-plated nickel powder is 4 mu m, the thickness of a plating layer is 5 mu m, the particle size of the silver-plated copper powder is 11 mu m, and the thickness of the plating layer is 5 mu m.
The invention relates to a method for manufacturing silicon rubber, which solves the problem of poor electromagnetic shielding capability of the silicon rubber manufactured in the prior art, adopts an open mill for mixing, fully mixes metal powder in the silicon rubber, and then prepares a finished product through compression molding, so that the metal powder can be uniformly dispersed and not separated out, and the method has incomparable advantages in the aspects of reducing material consumption, simplifying production process, reducing manufacturing and assembling cost, meeting strict assembly space limitation, improving production efficiency, improving cost performance of products and the like.
Claims (5)
1. The method for manufacturing the silicon rubber is characterized by comprising the following steps:
step 1, mixing a silicon rubber matrix, a cross-linking agent, a conductive medium and a magnetic medium on a double-roller open mill for 0.5-3 h at the temperature of 90-150 ℃;
and 2, performing compression molding on the composite material mixed in the step 1 at the temperature of 80-150 ℃ under the pressure of 9-20 MPa.
The conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the silicon rubber matrix comprises: a crosslinking agent: conductive medium: the mass ratio of the magnetic conductive medium is 4: 1-10: 100-400: 80-200.
2. The method for manufacturing silicone rubber according to claim 1, wherein the silicone rubber base body comprises: hydroxyl silicone rubber, vinyl silicone rubber and alkoxy silicone rubber.
3. The method for producing a silicone rubber according to claim 1, wherein the crosslinking agent comprises: isocyanate, organic peroxide and aliphatic azo compound.
4. The method for manufacturing silicone rubber according to claim 2, wherein the particle size of the silver-plated nickel powder is 1 to 6 μm, and the thickness of the plating layer is 1 to 6 μm.
5. The method for manufacturing silicone rubber according to claim 2, wherein the silver-plated copper powder has a particle size of 1 to 12 μm and a plating thickness of 1 to 7 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911133753.9A CN110877424A (en) | 2019-11-19 | 2019-11-19 | Method for manufacturing silicon rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911133753.9A CN110877424A (en) | 2019-11-19 | 2019-11-19 | Method for manufacturing silicon rubber |
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| Publication Number | Publication Date |
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| CN110877424A true CN110877424A (en) | 2020-03-13 |
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| CN201911133753.9A Pending CN110877424A (en) | 2019-11-19 | 2019-11-19 | Method for manufacturing silicon rubber |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050307A (en) * | 2007-04-24 | 2007-10-10 | 上海材料研究所 | Current conducting silicon rubber with capability of electromagnetic shielding, and fabricating method |
| CN103602072A (en) * | 2013-11-29 | 2014-02-26 | 国家电网公司 | Conductive silicone rubber with electromagnetic shielding performance and manufacturing method |
| CN105131612A (en) * | 2015-09-25 | 2015-12-09 | 深圳市博恩实业有限公司 | Self-adhesive conductive silicone rubber electromagnetic shielding material |
| CN106633919A (en) * | 2015-10-28 | 2017-05-10 | 深圳德邦界面材料有限公司 | FMVQ/TPU electric conduction composite material |
| CN108178854A (en) * | 2017-12-28 | 2018-06-19 | 新奥石墨烯技术有限公司 | Electromagnetic shield rubber and preparation method thereof and electronic equipment |
| CN110358305A (en) * | 2019-07-10 | 2019-10-22 | 平湖阿莱德实业有限公司 | A kind of powder filled elastomer of nickel plating and preparation method thereof having excellent weather resistance |
-
2019
- 2019-11-19 CN CN201911133753.9A patent/CN110877424A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050307A (en) * | 2007-04-24 | 2007-10-10 | 上海材料研究所 | Current conducting silicon rubber with capability of electromagnetic shielding, and fabricating method |
| CN103602072A (en) * | 2013-11-29 | 2014-02-26 | 国家电网公司 | Conductive silicone rubber with electromagnetic shielding performance and manufacturing method |
| CN105131612A (en) * | 2015-09-25 | 2015-12-09 | 深圳市博恩实业有限公司 | Self-adhesive conductive silicone rubber electromagnetic shielding material |
| CN106633919A (en) * | 2015-10-28 | 2017-05-10 | 深圳德邦界面材料有限公司 | FMVQ/TPU electric conduction composite material |
| CN108178854A (en) * | 2017-12-28 | 2018-06-19 | 新奥石墨烯技术有限公司 | Electromagnetic shield rubber and preparation method thereof and electronic equipment |
| CN110358305A (en) * | 2019-07-10 | 2019-10-22 | 平湖阿莱德实业有限公司 | A kind of powder filled elastomer of nickel plating and preparation method thereof having excellent weather resistance |
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| PB01 | Publication | ||
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Application publication date: 20200313 |