CN111873214A - Method for manufacturing semi-conductive silica gel for cable accessories - Google Patents
Method for manufacturing semi-conductive silica gel for cable accessories Download PDFInfo
- Publication number
- CN111873214A CN111873214A CN202010677723.0A CN202010677723A CN111873214A CN 111873214 A CN111873214 A CN 111873214A CN 202010677723 A CN202010677723 A CN 202010677723A CN 111873214 A CN111873214 A CN 111873214A
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- China
- Prior art keywords
- rubber
- mixing
- compounding agent
- steps
- stage
- Prior art date
- 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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Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 239000000741 silica gel Substances 0.000 title claims abstract description 10
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 37
- 238000013329 compounding Methods 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 238000009736 wetting Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000004898 kneading Methods 0.000 claims abstract description 6
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 6
- 239000010419 fine particle Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000012190 activator Substances 0.000 claims description 3
- 230000003712 anti-aging effect Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 239000000693 micelle Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 5
- 239000006229 carbon black Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- -1 accelerator Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000010074 rubber mixing Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001246 colloidal dispersion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 239000001039 zinc pigment Substances 0.000 description 1
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
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
- B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
-
- 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
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/52—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
- B29B7/56—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set
-
- 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
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
-
- 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
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention provides a method for manufacturing semiconductive silica gel for cable accessories, which comprises three steps of mixing by an open mill, mixing by an internal mixer and complementary processing. Step one, mixing by an open mill, comprising the following steps: wrapping rollers, eating powder and turning; step two, mixing by an internal mixer, comprising the following steps: a wetting stage, a dispersing stage and a kneading stage; and step three, supplementary processing treatment, comprising: tabletting and cooling, filtering and standing. When the mixing is carried out by the open mill, the compounding agent is dispersed in the rubber more uniformly by wrapping the roller, eating the powder and turning over the face, the mixing of the mixing mill enables the mixture, particularly the reinforcing compounding agent such as carbon black and the like to achieve the best dispersion degree so as to ensure the consistent performance of the rubber material, and the final supplementary processing treatment improves the quality requirement of the rubber.
Description
Technical Field
The invention relates to the technical field of rubber, in particular to a method for manufacturing semi-conductive silica gel for a cable accessory.
Background
The rubber mixing and the mixing process are the technological processes of uniformly dispersing various ingredients in rubber by the mechanical force of a rubber mixing machine. The mixing process is a process of uniformly dispersing various compounding agents in rubber to form a multiphase colloidal dispersion system using rubber as a medium or a mixture of the rubber and some compounding ingredients (compounding agents, other polymers) compatible with the rubber as a medium and compounding agents (such as powder fillers, zinc oxide, pigments and the like) incompatible with the rubber as a dispersed phase. The concrete technical requirements for the mixing process are as follows: the compounding agent is dispersed uniformly, so that the compounding agent, particularly the reinforcing compounding agent such as carbon black and the like, reaches the best dispersion degree, and the consistency of the performance of the sizing material is ensured. The rubber compound obtained after mixing is called "compound rubber", and the quality of the compound rubber has important influence on the further processing and the quality of products.
Disclosure of Invention
The invention aims to provide a method for manufacturing semi-conductive silica gel for cable accessories, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the preparation process of the special semiconductive silica gel for the cable accessory comprises three steps of mixing by an open mill, mixing by an internal mixer and complementary processing.
The mixing of an open mill comprises the following steps: (1) wrapping rollers, (2) eating powder and (3) tumbling.
(1) Wrapping a roller: after entering a roll gap, rubber tightly wraps a front roll, the roll gap is 4-8 mm, then the front roll is separated from the front roll to form a bag shape, and finally the front roll is wrapped by viscous flow.
(2) Eating the powder: the rubber roll and the open mill are sequentially fed with plastic rubber, reclaimed rubber and masterbatch, accelerator, activator and anti-aging agent, filler, liquid softener, sulfur and overspeed accelerator, and before the compounding agent is added, the upper end of the roll gap is kept with a proper amount of accumulation rubber.
(3) Turning: the circumferential mixing is the most uniform, the axial mixing is not uniform, and the radial uniformity is the worst.
And step two, the mixing of the internal mixer comprises (1) a wetting stage, (2) a dispersing stage and (3) a kneading stage.
(1) In the wetting stage, the large rubber blocks and the compounding agent are crushed by strong mechanical action, so that countless loose rubber particles are squeezed into gaps among the compounding agent particles and permeate into the surfaces of the compounding agent particles, the compounding agent is attached to the small rubber blocks, and finally, under the action of machinery and temperature, the small rubber blocks are contacted and pressed with each other to gradually become large rubber blocks, so that the compounding agent particles are surrounded and wetted by the raw rubber, and the contact area of the raw rubber and the compounding agent is continuously increased.
(2) And a dispersion stage, wherein the large rubber mass formed in the wetting stage is re-refined under the action of a large shearing force, the compounding agent aggregate mixed in the rubber is crushed into fine particles with tiny sizes and uniformly dispersed in the raw rubber to gradually become new large rubber blocks to directly form a continuous phase, and the homogenization process is completed, wherein the rubber discharge temperature is 100-130 ℃ during the mixing of an internal mixer.
(3) In the kneading stage, after the rubber materials are basically mixed, if the mixing is continued, the macromolecule chains of the raw rubber are gradually and obviously damaged, the molecular weight is reduced, the viscosity is reduced, and the elastic recovery effect is reduced.
And step three, supplementary processing treatment comprises (1) tabletting and cooling, (2) filtering glue and (3) parking in management.
(1) And (3) tabletting and cooling, immediately dipping and coating a separant liquid after tabletting for cooling and isolating, and further drying by blowing to reduce the temperature of the film to below 50 ℃.
(2) Filtering the rubber, namely filtering the rubber with strict performance and quality requirements, such as inner tube rubber with strict air tightness requirements, rubber of air bag rubber and pneumatic film products, and filtering the rubber by nasal inhalation after mixing.
(3) Parking and management, the use can be carried out after 4-8 hours of parking.
Preferably, the roll gap is 4-8 mm.
Preferably, the feeding sequence of the open mill is that plastic rubber, reclaimed rubber and masterbatch, accelerator, activator and anti-aging agent are added, filler, liquid softener are added, and finally sulfur and overspeed accelerator are added.
Preferably, the rubber discharge temperature during the mixing of the internal mixer is 100-130 ℃.
Compared with the prior art, the invention has the beneficial effects that: during mixing in an open mill, the compounding agents are dispersed in rubber more uniformly by wrapping rollers, eating powder and turning over, the mixing of the mixing mill enables the mixture, particularly the reinforcing compounding agents such as carbon black and the like to reach the best dispersion degree so as to ensure consistent sizing material performance, and the final supplementary processing treatment improves the quality requirement of the rubber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for manufacturing semiconductive silica gel for cable accessories, which comprises three steps of mixing by an open mill, mixing by an internal mixer and complementary processing.
The mixing of an open mill comprises the following steps: (1) wrapping rollers, (2) eating powder and (3) tumbling.
(1) Wrapping a roller: rubber enters a roller gap and is tightly wrapped by a front roller, then the roller is separated to form a bag shape, and finally the roller is wrapped by viscous flow.
(2) Eating the powder: before the compounding agent is added into the rubber covered roller, proper stacking rubber is reserved at the upper end of the roller spacing.
(3) Turning: the circumferential mixing is the most uniform, the axial mixing is not uniform, and the radial uniformity is the worst.
And step two, the mixing of the internal mixer comprises (1) a wetting stage, (2) a dispersing stage and (3) a kneading stage.
(1) In the wetting stage, the large rubber blocks and the compounding agent are crushed by strong mechanical action, so that countless loose rubber particles are squeezed into gaps among the compounding agent particles and permeate into the surfaces of the compounding agent particles, the compounding agent is attached to the small rubber blocks, and finally, under the action of machinery and temperature, the small rubber blocks are contacted and pressed with each other to gradually become large rubber blocks, so that the compounding agent particles are surrounded and wetted by the raw rubber, and the contact area of the raw rubber and the compounding agent is continuously increased.
(2) And in the dispersion stage, the large micelle formed in the wetting stage is re-refined under the action of a large shearing force, the compounding agent aggregate mixed in the rubber is crushed into fine particles with small sizes, and the fine particles are uniformly dispersed in the raw rubber and gradually become new large rubber blocks to directly form a continuous phase, so that the homogenization process is completed.
(3) In the kneading stage, after the rubber materials are basically mixed, if the mixing is continued, the macromolecule chains of the raw rubber are gradually and obviously damaged, the molecular weight is reduced, the viscosity is reduced, and the elastic recovery effect is reduced.
And step three, supplementary processing treatment comprises (1) tabletting and cooling, (2) filtering glue and (3) parking in management.
(1) And (3) tabletting and cooling, immediately dipping and coating a separant liquid after tabletting for cooling and isolating, and further drying by blowing to reduce the temperature of the film to below 50 ℃.
(2) Filtering the rubber, namely filtering the rubber with strict performance and quality requirements, such as inner tube rubber with strict air tightness requirements, rubber of air bag rubber and pneumatic film products, and filtering the rubber by nasal inhalation after mixing.
(3) Parking and management, the use can be carried out after 4-8 hours of parking.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A method for manufacturing semi-conductive silica gel for cable accessories is characterized by comprising the steps of mixing by an open mill, mixing by an internal mixer and complementary processing; the method specifically comprises the following steps:
the mixing of an open mill comprises the following steps:
(1) wrapping a roller: after entering a roll gap, rubber tightly wraps a front roll, then is taken off to form a bag shape, and finally is coated with a roll in a viscous flow manner;
(2) eating the powder: before adding the compounding agent into the rubber wrapping roller, keeping proper stacking rubber at the upper end of the roller spacing;
(3) turning: the circumferential mixing is the most uniform, the axial mixing is not uniform, and the radial uniformity is the worst;
step two, the mixing of an internal mixer comprises the following steps:
(1) a wetting stage: the large rubber blocks and the compounding agent are crushed by strong mechanical action, countless loose rubber particles are squeezed into gaps among the compounding agent particles and permeate into the surfaces of the compounding agent particles, the compounding agent is attached to the small rubber blocks, and finally, the small rubber blocks are mutually contacted and pressed under the action of machinery and temperature to gradually become large rubber blocks, so that the compounding agent particles are surrounded and wetted by raw rubber, and the contact area of the raw rubber and the compounding agent is continuously increased;
(2) a dispersing stage: the large micelle formed in the wetting stage is re-refined under the action of a large shearing force, the compounding agent aggregate mixed in the rubber is rubbed into fine particles with tiny sizes, and the fine particles are uniformly dispersed in the raw rubber and gradually become new large rubber blocks to directly form a continuous phase, thereby completing the homogenization process;
(3) kneading stage: after the rubber materials are basically mixed, if the mixing is continued, the large molecular chain of the raw rubber is gradually and obviously damaged, the molecular weight is reduced, the viscosity is reduced, and the elastic recovery effect is reduced;
and step three, supplementary processing treatment comprises the following steps:
(1) tabletting and cooling: immediately dipping and coating a separant liquid after tabletting for cooling and separation, and drying by blowing air to reduce the temperature of the film to below 50 ℃;
(2) filtering glue: the rubber materials such as inner tube rubber materials, air bag rubber and pneumatic film products with strict air tightness requirements are mixed and filtered;
(3) parking: and standing for 4-8 hours.
2. The method of claim 1, wherein the roller gap is 4-8 mm.
3. The method for preparing semiconductive silica gel for electric cable accessories according to claim 1, wherein the charging sequence of the open mill is: plastic glue, regenerated glue and master batch, then accelerator, activator and anti-aging agent, then filler, then liquid softener, finally sulfur and overspeed accelerator.
4. The method as claimed in claim 1, wherein the temperature of the silica gel discharged during the mixing process is 100-130 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677723.0A CN111873214A (en) | 2020-07-15 | 2020-07-15 | Method for manufacturing semi-conductive silica gel for cable accessories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677723.0A CN111873214A (en) | 2020-07-15 | 2020-07-15 | Method for manufacturing semi-conductive silica gel for cable accessories |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111873214A true CN111873214A (en) | 2020-11-03 |
Family
ID=73151652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010677723.0A Pending CN111873214A (en) | 2020-07-15 | 2020-07-15 | Method for manufacturing semi-conductive silica gel for cable accessories |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111873214A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106432613A (en) * | 2015-08-10 | 2017-02-22 | 招远市鹏泰轮胎翻新有限公司 | Rubber cement used for modifying vulcanized rubber, and preparation method thereof |
| CN107379303A (en) * | 2017-07-27 | 2017-11-24 | 安徽国华新材料有限公司 | A kind of calendering process of rubber |
-
2020
- 2020-07-15 CN CN202010677723.0A patent/CN111873214A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106432613A (en) * | 2015-08-10 | 2017-02-22 | 招远市鹏泰轮胎翻新有限公司 | Rubber cement used for modifying vulcanized rubber, and preparation method thereof |
| CN107379303A (en) * | 2017-07-27 | 2017-11-24 | 安徽国华新材料有限公司 | A kind of calendering process of rubber |
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| PB01 | Publication | ||
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Application publication date: 20201103 |
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