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Anonymous users2024-02-07According to the most common calculations, one square meter is about 800g.
Introduction to substances. Epoxy resin.
Epoxy resin is an organic compound that contains two or more epoxy groups in the molecule, and their relative molecular mass is not high except for a few individuals. The molecular structure of epoxy resin is characterized by the presence of active epoxy groups in the molecular chain, which can be located at the end, middle or in a cyclic structure of the molecular chain. Because the molecular structure contains active epoxy groups, they can be cross-linked with various types of curing agents to form insoluble polymers with a three-way network structure.
All polymer compounds containing epoxy groups in their molecular structure are collectively referred to as epoxy resins. The cured epoxy resin has good physical and chemical properties, it has excellent adhesion strength to the surface of metal and non-metallic materials, good dielectric properties, small variable shrinkage, good dimensional stability of products, high hardness, good flexibility, and stability to alkali and most solvents, so it is widely used in various departments of national defense and national economy for pouring, impregnation, laminating materials, adhesives, coatings and other uses.
Basic features: 1) High mechanical properties. Epoxy resin has strong cohesion and dense molecular structure, so its mechanical properties are higher than general thermosetting resins such as phenolic resins and unsaturated polyesters.
2) Strong adhesion. The epoxy resin curing system contains extremely active epoxy groups, hydroxyl groups, and polar groups such as ether bonds, amine bonds, and ester bonds, which give the epoxy cured material excellent adhesion to polar substrates such as metal, ceramic, glass, concrete, and wood.
3) Small curing shrinkage. Generally 1% 2%. It is one of the varieties with the smallest curing shrinkage among thermosetting resins (phenolic resin is 8% 10%; unsaturated polyester resin, 4% 6%; Silicone resins are 4% to 8%).
The linear expansion coefficient is also very small, generally 6 10-5. So the volume does not change much after curing.
4) Good manufacturability. Epoxy resins do not produce low molecular weight volatiles when cured, so they can be molded at low pressure or by contact. It can be combined with various curing agents to make solvent-free, high-solid, powder coatings and water-based coatings and other environmentally friendly coatings.
5) Excellent electrical insulation. Epoxy resin is one of the varieties with the best intermediate electrical properties of thermosetting resins.
6) Good stability and excellent chemical resistance. Epoxy resin that does not contain impurities such as alkali and salt is not easy to deteriorate. As long as it is stored properly (sealed, not damp, and not exposed to high temperatures), its storage period is 1 year.
After the expiration date, it can still be used if the inspection is qualified. Epoxy cured products have excellent chemical stability. Its resistance to alkali, acid, salt and other media corrosion is better than that of thermosetting resins such as unsaturated polyester resin and phenolic resin.
Therefore, epoxy resin is widely used as an anti-corrosion primer, and because the epoxy resin cured product has a three-dimensional network structure, it can resist oil and other impregnation, and is widely used in oil tanks, oil tankers, and aircraft overall fuel tank lining.
7) The heat resistance of epoxy cured material is generally 80 100. Epoxy resins are available in heat-resistant varieties up to 200 or higher.
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Anonymous users2024-02-06Dear, hello, I'm glad to answer for you, how many kilograms per square meter do you need for epoxy resin 1mm thickness? A: Epoxy resin 1mm thickness needs kilograms to kilograms per square meter. The calculation is as follows:
The density of epoxy resin is generally gram) = kilogram) gram) ) = kilogram) A general term for a class of polymers containing more than two epoxy groups in the molecule. It is a polycondensation product of epichlorohydrin with bisphenol A or polyols. Due to the chemical activity of the epoxy group, it can be used to open the ring with a variety of compounds containing active hydrogen, solidify and cross-link to form a network structure, so it is a thermosetting resin.
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Anonymous users2024-02-05Epoxy resin 1mm thickness requires kilograms to kilograms per square meter.
The calculation is as follows:
The density of epoxy resins is:
g) = kg).
g) = kg).
4mm thickness requires kilograms to kilograms of epoxy resin per square meter.
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Anonymous users2024-02-04It depends on your brand, generally speaking, temperature resistance refers to the working temperature, but there is an exception for one kind of board, the most common epoxy phenolic insulating board on the market, its temperature resistance is grade B, that is, 125 degrees, but in fact it can be maintained for a long time at about 180 degrees, but when it is above 125 degrees, phenolic will condense and produce water, and the insulation performance of the insulating board will decline, so in general, the temperature resistance of the board is defined as grade B.
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Anonymous users2024-02-03Epoxy resin insulation board is a thermosetting polymer molding compound, the maximum service temperature is 204;
The data are quoted from the Technical Manual of Electrical and Electronic Insulation, p 451) The actual operating temperature is determined by the heat resistance level of the product
For example, the heat resistance level of epoxy laminated glass cloth board (model: 9320, upper 3242, etc.) is F (i.e. 155).
Copper-clad foil epoxy glass cloth laminate (models: CEPGC-31, CEPGC-32F) has a heat resistance rating of B (i.e. 130).
The data are quoted from the second volume of the "Catalogue of Latest Commonly Used Electrical Products", P 2312 2314).
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