The function of the insulating material is to isolate the charged parts of different electrical potentials in the electrical equipment. Therefore, the insulating material should first have high insulation resistance and compressive strength, and can avoid accidents such as electric leakage and breakdown. Secondly, the heat resistance is better, avoiding deterioration due to long-term overheating; in addition, it should have good thermal conductivity, moisture resistance, high mechanical strength and convenient processing. According to the above requirements, the performance indexes of commonly used insulating materials include dielectric strength, tensile strength, specific gravity, and expansion coefficient.
Insulation materials commonly used by electricians are classified into inorganic insulating materials, organic insulating materials and mixed insulating materials according to their chemical properties. Commonly used inorganic insulating materials are: mica, asbestos, marble, porcelain, glass, sulfur, etc., mainly used as winding insulation for motors and electrical appliances, bottom plates and insulators for switches. Organic insulating materials are: shellac, resin, rubber, cotton yarn, paper, hemp, rayon, etc., mostly used to make insulating varnish, coated insulation of winding wires, etc. The hybrid insulating material is a variety of molded insulating materials which are processed by the above two materials, and are used as a base, an outer casing, and the like of an electric appliance.
Acrylic mounting systems have a short cure time and are recommended for high pressure and high temperature sensitive sample installations. Buehler's products include acrylic liquids, powders and kits for various metallographic sample testing applications.
Samplkwick-acrylic mounting compound is designed to package PCB samples quickly and efficiently. By immerging the sample in an acrylic liquid prior to potting, Buehler's SamplKwick wets well and enters smaller holes and grooves, easily providing the edge holding required for good permeability and excellent electronic preparation. In order to reduce the viscosity of mixed acrylic acid, the optimal volume mixing ratio of powder to liquid is 1∶1 or 1.5∶1.
VariKleer- ideal for use with pressure vessels, produces a clear acrylic coating that hardens and reduces shrinkage, ensuring that PCB sample samples are ground to the desired level. For transparent installations, use SamplKup instead of EPDM or a one-time installation.
VariDur- is a quick system of acrylic fillers with short curing cycles compared to epoxy resins where edge curing is not critical and is particularly suitable for hardening of metal samples.
Cold Mounting Consumables,Cold Mounting Metallography,Cold Mounting Epoxy Resin,Cold Mounting Procedure
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