CN104515697B - The detection preparation method of sample and vacuum degasser of normal temperature cure Silicone Rubber Based Coatings - Google Patents
The detection preparation method of sample and vacuum degasser of normal temperature cure Silicone Rubber Based Coatings Download PDFInfo
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- CN104515697B CN104515697B CN201410779376.7A CN201410779376A CN104515697B CN 104515697 B CN104515697 B CN 104515697B CN 201410779376 A CN201410779376 A CN 201410779376A CN 104515697 B CN104515697 B CN 104515697B
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- 238000000576 coating method Methods 0.000 title claims abstract description 61
- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 29
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 239000003973 paint Substances 0.000 claims abstract description 11
- 230000009514 concussion Effects 0.000 claims abstract description 8
- 238000007872 degassing Methods 0.000 claims abstract description 3
- 235000013399 edible fruits Nutrition 0.000 claims abstract description 3
- 229920001971 elastomer Polymers 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000010422 painting Methods 0.000 claims description 4
- 210000000707 wrist Anatomy 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Abstract
The invention discloses the detection preparation method of sample and vacuum degasser of normal temperature cure Silicone Rubber Based Coatings, include the following steps：1) concussion of normal temperature cure Silicone Rubber Based Coatings finished product is taken to shake up；2) the normal temperature cure Silicone Rubber Based Coatings finished product shaken after shaking up is poured into paint cup, in carrying out Fruit storage, processing time is 2 3min, vacuum ＜ 10‑1Pa, the coating after must deaerating；3) surface of the coating after degassing is condensed film to remove, then be poured into mould, stood to coating surface after condensing, by mould in temperature：20 DEG C 25 DEG C, humidity：Under conditions of 30% 35%, then 96 102h are stood, taken out, up to normal temperature cure Silicone Rubber Based Coatings sample.This programme effectively excludes environmental factor, the influence of dissolved gas, dust in air to testing result in such as coating, improves the accuracy of sampling examination.
Description
Technical field
The invention belongs to coating test field, more particularly to the detection preparation method of sample of normal temperature cure Silicone Rubber Based Coatings and
Vacuum degasser.
Background technology
With the development of national economy, various regions pollution sources are on the increase, and insulator surface contamination is on the rise, in severe gas
As under the conditions of, pollution flashover accident easily occurs, threatens the safe and stable operation of electric system, normal temperature cure Silicone Rubber Based Coatings have
Excellent hydrophobicity and migration of hydrophobicity, can significantly improve the pollution flashover voltage of insulator, in practice it has proved that, sprayed in insulator surface
Normal temperature cure Silicone Rubber Based Coatings, can be effectively reduced pollution flashover probability of happening, and the safe and stable operation to ensureing electric system has
Significance.However, domestic existing normal temperature cure Silicone Rubber Based Coatings manufacturer is numerous, product quality is uneven, therefore,
The networking detection of normal temperature cure Silicone Rubber Based Coatings is very necessary.In sampling examination project, the body of normal temperature cure Silicone Rubber Based Coatings
The parameters such as product resistivity, relative dielectric constant, dielectric loss angle, dielectric strength determine the insulation performance of coating, these parameters
Measure need to prepare normal temperature cure Silicone Rubber Based Coatings sample in advance, the quality of sample directly determines final testing result, but
It is that there is no unified method or standard to go the preparation process of specification normal temperature cure Silicone Rubber Based Coatings sample at present, easily causes to detect
As a result the problems such as inaccurate.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of preparation method of normal temperature cure Silicone Rubber Based Coatings detection sample, energy
Environmental factor is effectively excluded, the influence of dissolved gas, dust in air to testing result in such as coating, improves sampling examination
Accuracy.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of detection preparation method of sample of normal temperature cure Silicone Rubber Based Coatings, includes the following steps：
1) concussion of normal temperature cure Silicone Rubber Based Coatings finished product is taken to shake up；
2) the normal temperature cure Silicone Rubber Based Coatings finished product shaken after shaking up is poured into paint cup, carries out Fruit storage, place
The reason time is 2-3min, vacuum ＜ 10-1Pa, the coating after must deaerating；
3) surface of the coating after degassing is condensed film to remove, then is poured into mould, stood under vacuum condition to
After coating surface condenses, by mould in temperature：20 DEG C -25 DEG C, humidity：Under conditions of 30%-35%, then 96-102h is stood, taken
Go out, up to the detection sample of normal temperature cure Silicone Rubber Based Coatings.
Preferably, in step 1), the concussion time is 2-3min.
Further, in step 2), the paint cup is open cup.
Further, in step 3), the mould is open type channel-shaped flat plate mold.
Further, in step 3), concretely comprising the following steps for mould is poured into：Mould is placed in horizontal table top, adjusts groove face
After level, the coating after the membrane removal that deaerates is poured into from mold center position, into mould, coatings volume is the 2/3 of mould cumulative volume
Stop during the above.
Further, in step 3), the mould is in horizontality all the time.
Present invention also offers a kind of vacuum degasser of the detection sample of normal temperature cure Silicone Rubber Based Coatings, its feature exists
In, vacuum tank is connected by connecting tube with vacuum pump, and vacuum upper end is provided with openable sealing cover, vacuum pot sidewall it is upper
Portion is provided with pressure gauge, and the lower part of vacuum pot sidewall is provided with vent valve, and the bottom of vacuum tank is provided with bumper.
Preferably, the connecting tube is connected by exhausting-gas hole with vacuum tank.Can by adjusting the size of vent openings,
Pressure in refined condition vacuum tank.
Preferably, it is provided with heater strip on the bumper.
Preferably, the side wall of the vacuum tank is made of clear material, and is provided with inwardly protruded rubber gloves.
Preferably, the side wall of the lateral surface of the rubber gloves wrist mouth and vacuum tank is tightly connected.
Beneficial effects of the present invention：
1. the present invention provides a kind of detection preparation method of sample of simple and effective normal temperature cure Silicone Rubber Based Coatings, pass through
The removal that vacuum degasser and surface condense film effectively excludes environmental factor, dissolved gas, dust in air in such as coating
Influence to testing result, improves the accuracy of sampling examination.
2. preparation process of the present invention is simple, cost is low, the coating sample stability of preparation is high, reappearance and accuracy of detection
It is high.
Brief description of the drawings
Fig. 1 is the operational flowchart of the present invention
Fig. 2 is the structure chart of vacuum degasser, wherein, 1- vacuum tank 2- pressure gauge 3- exhausting-gas hole 4- bumpers 5- connections
Pipe 6- vent valve 7- vacuum pump 8- sealing cover 9- paint cup 10- vacuum pot sidewall 11- rubber gloves.
Fig. 3 is vacuum degasser side view
Embodiment
Mode by the following examples further illustrates the present invention, but does not therefore limit the present invention to the reality
Apply among a scope.The experimental method of actual conditions is not specified in the following example, is conventionally selected with condition
Select.
Embodiment 1
Before bucket is not driven, the concussion of normal temperature cure Silicone Rubber Based Coatings finished product is shaken up, the coating stood for long-time, shakes
Time be 2 minutes, bucket is driven after shaking up, rapidly pours into sample at 3/4 in paint cup, avoids air to dissolve in painting as far as possible
Material, vacuum extractor carry out vacuumize process, pumpdown time 3min, vacuum ＜ 10-1pa.In vacuum, for inspection
Test vacuumizing effect, the visible obvious Bubble of coating surface.After gas evolution in sample, remove surface with tweezers and condense
Film, quickly pours into open type channel-shaped flat plate mold by coating, and mould should be positioned in horizontal table top, under vacuum condition, and
Ensure that groove face is horizontal.After coating surface condensation, mould is positioned in climatic chamber, should keep horizontal when moving moulds,
Ensure that mould is in horizontality in climatic chamber at the same time.Temperature is set as 20 DEG C, humidity 30%, is taken out after 96h.
The result shows that：Compared with original detection method, using method provided by the present invention, volume resistivity, opposite Jie
The detection accuracy of the indexs such as electric constant, dielectric strength, dielectric loss angle tangent improves 5%-7%, while the inventive method
The interference of environmental factor, human factor to testing result is eliminated, the repeatability of testing result is high.
A kind of vacuum degasser of normal temperature cure Silicone Rubber Based Coatings detection sample, vacuum tank 1 pass through connecting tube 5 and vacuum
Pump 7 is connected, and 1 top of vacuum tank is provided with openable sealing cover 8, and the top of 1 side wall of vacuum tank is provided with pressure gauge 2, vacuum
The lower part of pot sidewall is provided with vent valve 6, and the bottom of vacuum tank 1 is provided with bumper 4.
Preferably, the connecting tube 5 is connected by exhausting-gas hole 3 with vacuum tank 1.
The sealing cover 8 of vacuum tank 1 is opened, the paint cup 9 equipped with coating is placed on the bumper 4 in vacuum tank, is closed
Sealing cover 8, closes the valve switch of vent valve 6, opens bumper 4, shockproofness is not moved with paint cup 9 to be advisable, and beats
Vacuum pump 7 is opened, with the reduction of vacuum indoor gas, sealing cover 8 is closely adsorbed on vacuum tank 1, observes pressure gauge 2,
When vacuum reaches 10-1After pa, 3min is maintained, the gas in coating is discharged completely at this time, closes vacuum pump 7 and bumper 4,
Open vent valve 6 to switch, after air pressure balance, open sealing cover 8, take out paint cup 9.(specific device is referring to Fig. 2)
Preferably, it is provided with heater strip on the bumper.It can be met by the temperature in computer heating control vacuum tank
The test request of different materials.
Preferably, the side wall 10 of the vacuum tank is made of clear material, and is provided with inwardly protruded rubber gloves
11.User can operate the sample in vacuum tank by gloves, and the sample realized under degree vacuum condition absolutely is surveyed
Examination, avoids the interference of external environment condition.
Preferably, the side wall of the lateral surface of the rubber gloves wrist mouth and vacuum tank is tightly connected.When locating in vacuum tank
That under atmospheric pressure, rubber gloves are inwardly expanded in vacuum condition, convenient for users to hand is stretched into gloves.
Embodiment 2
Before bucket is not driven, the concussion of normal temperature cure Silicone Rubber Based Coatings finished product is shaken up, the coating stood for long-time, shakes
Time be 3 minutes, bucket is driven after shaking up, rapidly pours into sample at 3/4 in paint cup, avoids air to dissolve in painting as far as possible
Material, vacuum extractor carry out vacuumize process, pumpdown time 3min, vacuum ＜ 10-1pa.In vacuum, for inspection
Test vacuumizing effect, the visible obvious Bubble of coating surface.After gas evolution in sample, remove surface with tweezers and condense
Film, quickly pours into open type channel-shaped flat plate mold by coating, and mould should be positioned in horizontal table top, under vacuum condition, and
Ensure that groove face is horizontal.After coating surface condensation, mould is positioned in climatic chamber, should keep horizontal when moving moulds,
Ensure that mould is in horizontality in climatic chamber at the same time.Temperature is set as 25 DEG C, humidity 60%, is taken out after 102h.
The mould is under vacuum condition all the time, vacuum ＜ 10-1pa。
Embodiment 3
Before bucket is not driven, the concussion of normal temperature cure Silicone Rubber Based Coatings finished product is shaken up, the coating stood for long-time, shakes
Time be 2.5 minutes, bucket is driven after shaking up, rapidly pours into sample at 3/4 in paint cup, avoids air to dissolve in painting as far as possible
Material, vacuum extractor carry out vacuumize process, pumpdown time 3min, vacuum ＜ 10-1pa.In vacuum, for inspection
Test vacuumizing effect, the visible obvious Bubble of coating surface.After gas evolution in sample, remove surface with tweezers and condense
Film, quickly pours into open type channel-shaped flat plate mold by coating, and mould should be positioned in horizontal table top, under vacuum condition, and
Ensure that groove face is horizontal.After coating surface condensation, mould is positioned in climatic chamber, should keep horizontal when moving moulds,
Ensure that mould is in horizontality in climatic chamber at the same time.Temperature is set as 22.5 DEG C, humidity 45%, is taken out after 98h.
Although above-mentioned be described the embodiment of the present invention with reference to attached drawing, model not is protected to the present invention
The limitation enclosed, those skilled in the art should understand that, on the basis of technical scheme, those skilled in the art are not
Need to make the creative labor the various modifications that can be made or deformation still within protection scope of the present invention.
Claims (1)
1. a kind of detection preparation method of sample of normal temperature cure Silicone Rubber Based Coatings, it is characterised in that include the following steps：
1) concussion of normal temperature cure Silicone Rubber Based Coatings finished product is taken to shake up；
2）The normal temperature cure Silicone Rubber Based Coatings finished product shaken after shaking up is poured into paint cup, carries out Fruit storage, during processing
Between be 2-3min, vacuum ＜ 10-1Pa, the coating after must deaerating；
3）The surface for removing the coating after above-mentioned degassing condenses film, then is poured into mould, is stood under vacuum condition to painting
After expecting that surface condenses, mould is placed in temperature：20 DEG C -25 DEG C, humidity：Under conditions of 30%-35%, then 96-102 h are stood, taken
Go out, up to normal temperature cure Silicone Rubber Based Coatings sample；
Step 1）In, the concussion time is 2-3min；
Step 3）In, the mould is open type channel-shaped flat plate mold；
Step 3）In, pour into concretely comprising the following steps for mould：Mould is placed in horizontal table top, after adjusting groove face level, will be deaerated
Coating after membrane removal is poured into from mold center position, is stopped when into mould, coatings volume is more than the 2/3 of mould cumulative volume；
Step 3）In, the mould is in horizontality all the time
Above-mentioned preparation method is completed using following vacuum degasser, which includes：Vacuum tank, vacuum pump, bumper；
Vacuum tank is connected by connecting tube with vacuum pump, and vacuum upper end is provided with openable sealing cover, the top of vacuum pot sidewall
Pressure gauge is provided with, the lower part of vacuum pot sidewall is provided with vent valve, and the bottom of vacuum tank is provided with bumper；
The connecting tube is connected by exhausting-gas hole with vacuum tank；
Heater strip is provided with the bumper；
The side wall of the vacuum tank is made of clear material, and is provided with inwardly protruded rubber gloves；
The lateral surface of the rubber gloves wrist mouth and the side wall of vacuum tank are tightly connected；
The sample is used to detect volume resistivity, relative dielectric constant, dielectric loss angle, dielectric strength.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410779376.7A CN104515697B (en) | 2014-12-16 | 2014-12-16 | The detection preparation method of sample and vacuum degasser of normal temperature cure Silicone Rubber Based Coatings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410779376.7A CN104515697B (en) | 2014-12-16 | 2014-12-16 | The detection preparation method of sample and vacuum degasser of normal temperature cure Silicone Rubber Based Coatings |
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| CN104515697B true CN104515697B (en) | 2018-05-04 |
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| CN106568679B (en) * | 2016-10-13 | 2019-08-02 | 杭州富通线缆材料研究开发有限公司 | Paste density measurement system and method |
| CN109613411B (en) * | 2018-12-12 | 2021-03-19 | 国网山东省电力公司电力科学研究院 | Preparation method of test sample for electrical insulation performance of external insulation anti-pollution flashover coating |
| CN111272069B (en) * | 2020-03-04 | 2020-11-24 | 清华大学 | Device and method for measuring volume change of rubber under different vulcanization reaction degrees |
| CN113843931B (en) * | 2021-09-17 | 2023-06-20 | 西南技术物理研究所 | GD414C silicone rubber resistivity changing method |
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| CN1031502A (en) * | 1987-07-23 | 1989-03-08 | 钱平吉 | Compound decorating material and manufacturing process thereof |
| CN2063865U (en) * | 1990-03-08 | 1990-10-17 | 唐山马家沟耐火材料厂 | Vibration shaper |
| JP4279170B2 (en) * | 2003-02-24 | 2009-06-17 | 新道繊維工業株式会社 | Method for producing silicone rubber |
| CN2600148Y (en) * | 2003-03-07 | 2004-01-21 | 中国进出口商品检验技术研究所 | High-efficient solution degasification device |
| CN100509333C (en) * | 2007-09-24 | 2009-07-08 | 天津市天大银泰科技有限公司 | Vacuum degassing device having rough material overflow-resisting function |
| US7902294B2 (en) * | 2008-03-28 | 2011-03-08 | General Electric Company | Silicone rubber compositions comprising bismuth oxide and articles made therefrom |
| CN104130580A (en) * | 2013-05-27 | 2014-11-05 | 国家电网公司 | Silicone rubber having high resistance to electric erosion and used for insulator, and preparation method thereof |
| CN204286898U (en) * | 2014-12-16 | 2015-04-22 | 国家电网公司 | The vacuum degasser of the test samples of normal temperature cure Silicone Rubber Based Coatings |
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