Anti-condensation sealant produced by Anhui Huofeng Electric Co., Ltd. is mainly used in various high and low voltage switchgear, ring network cabinet, box substation, cable branch box, opening and closing station, terminal box, high-speed rail special box and other electrical equipment. The anti-condensation dew seal at the bottom of the cabinet. At room temperature, the components of the materials are mixed and stirred, poured into the bottom of the cabinet, self-leveling and then solidified by reaction to form a solid and dense sealing plate at the bottom of the cabinet;
The HoFeG-anti-condensation sealant comprises three components: a component A, a component B, and a C synergistic component. Wherein component A, component B is in a liquid state, component C is a solid powder; the component A is mixed with the component C by a suitable ratio, and then the component B is added, and after mixing the three components, Solidified in a controlled time, providing a professional and effective solution for the anti-condensation treatment of the bottom of electrical equipment;
Since such products are currently not available for national standards and industry standards. Anhui Huofeng Electric Co., Ltd. has compiled this standard through a large number of scientific research, field construction experience and reference to the regulations and standards of relevant materials at home and abroad, and repeated analysis and verification of each parameter in the standard.
The main technical contents of this standard: product definition, product specifications, technical requirements, test methods, testing rules, packaging, transportation, storage, etc. of anti-condensation sealant.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by Anhui Huofeng Electric Co., Ltd.
This standard is mainly drafted by: Anhui Huofeng Electric Co., Ltd.
The main drafters of this standard: Chen Hui, Ding Xiwei, Liu Hewen, Zhu Binbin
This standard specifies the terms and definitions, product specifications, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of anti-condensation sealants.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated date applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 1408.1 Insulation material electrical strength test method
GB/T 2408 Determination of the burning properties of plastics - Horizontal method and vertical method
GB/T 3399 plastic thermal conductivity test method thermal plate method
Determination of apparent density of GB/T6343 foam and rubber
GB 8624 building materials and products burning performance classification
Determination of water absorption of GB 8810 rigid foam
GB 8811 rigid foam plastic dimensional stability test method
GB 8813 rigid foam plastic compression strength test method
GB/T 9641 rigid foam plastic tensile test method
GB/T 13477 Building Sealing Material Test Method
Test method for water vapor transmission performance of GB/T 17146 building materials and their products
3 Terms and definitions
The following terms and standards apply to this standard.
3.1 anti-condensation plugging agent
HoFeG-anti-condensation sealant is mainly used for anti-condensation of various high and low voltage switchgear, ring network cabinet, box substation, cable branch box, opening and closing station, terminal box, high-speed rail special box and other electrical equipment cabinet bottom. Airtight plugging. Materials include: component A, component B, and C synergistic component.
3.2 self-leveling sealing technology
After mixing and stirring the three components , the liquid is not less than 10 minutes, immersed in the gaps and holes between the cable and the pipeline of the cable compartment of the equipment, and self-leveling, and then solidified by expansion to form a sealing effect.
3.2 Gas seal
Air-tight plugging refers to the sealing of the holes and gaps around the cable when the cable or pipeline passes through the equipment floor, wall, pipeline, etc., and the gas cannot pass through the sealing performance of the structural member. After solidification, a solid sealing body is formed, which has a good sealing effect and effectively prevents moisture, smoke, poison gas and liquid water from passing through.
4 product classification and marking
4.1 Product Classification
Suitable for ambient temperature at 0～15°C reaction
Suitable for ambient temperature at 15~40°C reaction
4.2 Product Marking Method:
The order of marking is: enterprise code, applicable season, standard blocking area (m2)
Product name code
4.3 Product specifications and colors
1. Product standard specifications: The weight and ratio of the three components A, B and C are suitable for the material of 1m2 blocking area;
2. The product specification weight shall be determined by negotiation between the supplier and the buyer;
3. After the product is cured, the color is gray to grayish black. The color of the specific product can also be decided by both parties.
5 Technical requirements
5.1.1 Environmental requirements
In the curing molding reaction experiment in 5.2.1, the winter product should be tested in the environment of 0 ~ 15 °C, and the summer product should be tested in the environment of 15 ~ 40 °C;
5.2 Performance requirements
5.2.1 Product liquid material properties
Regular colorless and transparent (available by both parties)
Regular brown (available by both parties)
Conventional black and white powder mixture (determined by both parties)
5.2.1 Curing Forming Reactivity
Curing molding reaction indicators should meet Table 2:
Curing molding reactivity index
Temperature: 0 ~ 40 ° C
Humidity: ≤ 50 %
Stirring rate: 900 ~ 1500r / min
3 to 5 minutes
Maximum reaction temperature
70 ° C
4 to 6 times
Appearance after molding
Conventional gray-white foam with no coking layer at the bottom, no shrinkage around, no cracks on the surface
The test method for curing molding reaction performance is tested in accordance with the requirements of 6.2 of this standard;
5.3 Cured molded products
5.3.1 Appearance requirements
Evenly flattened the surface of the foam without cracks, no shrinkage around, no coking layer at the bottom, no bottoming gel precipitated.
5.3.2 Curing and molding product indicators should meet Table 3:
Cured molding product index
Uniform foam, no bottom glue
Closed cell ratio
200 to 250
Water absorption rate
w/(m ? k)
Water vapor permeability coefficient
[ng/(m ? s ? Pa]
Interface with concrete ≥0.5
Interface with PVC ≥0.5
Interface with metal steel plate ≥0.5
Interface with metal galvanized aluminum plate ≥0.5
Flame retardant performance
6 Test methods
It is carried out by a combination of visual inspection and hand touch.
6.2 Curing Forming Reaction Test Method
6.2.1 When weighing the sample, weigh it to 0.001 g, and measure the length, width and height to 0.1CM. The amount of materials and experimental procedures should be carried out in strict accordance with the provisions of this method;
6.2.2 Inspection device
The test is to take a 100mm*100mm*50mm five-sided iron box or carton as the substrate, and place a plastic/film board on the bottom plate and lay it on the bottom of the iron box. At one end of the diagonal line as a pouring point, a cable array of 10 mm in diameter is placed at the center of the bottom of the carton.
6.2.3 Inspection items and standards:
Starting time t 1
3 to 5 minutes
Gel time t 2
Dry time t 3
Reaction maximum temperature T 1
Leveling time (t 5 -t 4 )
4 to 6 times
Appearance after molding
Gray-white uniform foam with no coking layer at the bottom and no shrinkage around
6.2.4 Inspection steps:
Environmental control: The summer product will be placed in an equilibrium state at 35 °C ± 1 °C ambient temperature; the winter product temperature is 10 °C ± 1 °C ambient temperature;
Mix the sampled HoFeG -anti-condensation sealant batch according to the appropriate ratio , use the electric stirring tool (stirring frequency 600-2000 rev / min), stir the mixing time for about 2-3 minutes, and then at the specified pouring point A point The mixed solution was poured into the test device and timing was started. Record the start pouring time as t 4 , observe the time t 5 flowing to the diagonal point B and record; leveling time = t 5 -t 4
As a starting point from the start of mixing T 0 , the timing test sample Rise time T . 1 . The gel time T 2 and time T dry . 3 , the dew condensation preventing sealant material after casting group, the equilibrium state of the flow, the initial test Height H 0 , after the start of the hair when the height of the rise is 110% of the equilibrium height, as an inspiration point, the time is recorded as the start time t 1 , after the anti-condensation sealant completely loses fluidity after the rise Time as the gel time t 2 , using a disposable filter paper, placed on the surface of the anti-condensation sealant material after the initiation, the material is inverted, if the filter paper is not bonded to the surface of the anti-condensation sealant material, then the time It is recorded as the dry time t 3 . At this time, the highest point of the anti-condensation sealant material is recorded as H 1 . The whole temperature is tested in the whole process, and the highest temperature T 1 is the highest reaction temperature.
The foaming rate is calculated as the foaming rate = (H 1 - H 0 ) / H 0 . At 24H after the end of the reaction, dissect the appearance of the material, observe whether there is a coking layer at the bottom, and whether there is shrinkage crack around it;
Note 1: The mixed batch materials need to be used up at one time and cannot be used twice.
6.3 Curing Formed Samples
6.3.1 Curing Molded Product Properties The required samples were prepared by the following experimental methods:
a. The liquid material is prepared into a 500 mm*500 mm*50 mm sheet in a mold under standard conditions for its appearance, closed cell ratio, density, compressive strength, dimensional stability, water absorption, oxygen index, and breakdown voltage. These eight indicators are tested.
b. The mixed liquid material is poured under standard conditions, and is poured into an analog electrical cabinet made of concrete material, PVC material, metal steel plate material, metal galvanized aluminum plate material, and tested for various reaction performances in 5.2, and After solidification molding, the appearance, water vapor permeability coefficient and bond strength with each interface required in 5.3 were tested.
7 Inspection rules
7.1 Inspection classification
Factory inspection and type inspection.
7.1.1 Factory inspection
The product must be factory tested when it leaves the factory. The inspection items include appearance, start time, leveling time, surface drying time, gel time, expansion ratio, reaction temperature, sealing performance and stability.
7.1.2 Type inspection
Type inspection items include all items in the technical requirements. Type inspection should be carried out in one of the following cases:
1) When the trial-produced product is put into production and appraisal;
2) Continuously produced products for two years;
3) When the factory inspection result is significantly different from the previous type inspection result;
4) When there are major changes in the materials, formulations and processes of the products;
5) When the user has special requirements;
6) When the national quality supervision agency proposes.
7.2 Group batch and sampling
7.2.1 Group batch
The same raw material, the same production process, stable and continuous production of products as an inspection lot, the maximum amount of each batch of products is 1000Kg.
Each batch is randomly sampled at 1Kg for factory inspection.
7.3 Decision rules
The test results all meet the requirements of each index in the performance requirements of Chapter 5. If there are unqualified items in the test, double sampling is allowed for re-inspection; if there are still unqualified items in the re-inspection, the batch is judged as Not qualified.
8 Packaging, marking, transportation, storage
The liquid material needs to be bottled, and the bottle mouth needs to be sealed with tin foil material; the solid powder material can be packaged in a bag form, and the package should be waterproof and moisture proof. There should be obvious signs such as “careful handling, no food” on the packaging. The filling material is used to cut off and protect three different materials in the package;
Should include the following:
a) the manufacturer's name or code;
b) name, address and telephone number of the manufacturing company;
c) date of manufacture or batch number;
d) product specifications;
e) Certificate of conformity.
8.3.1 Products can be transported by car, train, ship or container. Cars can be transported in bulk, and other means of transport should be transported in boxes or bundles.
8.3.2 The product shall not be inverted, strongly vibrated and collided during transportation, loading and unloading.
8.3.3 Handle with care, keep away from open flames, and keep the package intact.
9.1.1 should be stored in a dry, ventilated warehouse, and should not be mixed.
9.1.2 Keep away from heat and fire when storing, and should not be in contact with chemicals.
9.1.3 The storage site shall be solid and level, and the height of the other party shall not exceed 2 m;
Storage temperature is not more than 35 ° C, the product temperature should be greater than 10 ° C, less than 35 ° C before use.