What are the performance characteristics of the 3240 epoxy board?

Many friends in the industry often consult the problem. Today, I mainly share with you my personal point of view. Interested and then look down.
1, in various forms. Various resins, curing agents, modifier systems can be adapted to a wide range of applications to the requirements of the form, ranging from very low viscosity to high melting solids.
2, easy to cure. Choose a variety of curing agent, epoxy resin system can be almost 0 ~ 180 ℃ temperature range curing.
3, strong adhesion. The presence of polar hydroxyl and ether linkages inherent in the molecular chain of the mica insulation sheets gives it a high adhesion to various substances. Epoxy resin curing low shrinkage, the resulting internal stress is small, which also helps to improve the adhesion strength.
4, low shrinkage The reaction of the epoxy resin and the curing agent used is carried out by a direct addition reaction or by ring-opening polymerization of an epoxy group in the resin molecule without the presence of water or other volatile by-products. They exhibit very low shrinkage (less than 2%) compared to unsaturated polyester resins and phenolic resins during curing.

How to distinguish insulation board insulation is good or bad?

insulation transformer pressboard, also known as epoxy resin insulation board, he is a relatively common insulating rubber products, it has a good insulation properties, how to identify the insulation board insulation performance?
1, breakdown voltage: breakdown voltage level is usually used to determine the insulation properties of rubber insulation products, an important standard, is an indispensable technical parameters. Each designer in the design of the time to pay attention to the breakdown of the voltage problem, this is not only the impact of insulation performance, but also insulation board product safety and the use of an important standard of stability.
2, the dielectric constant The dielectric constant of the word is more professional, it is a measure of the conductivity of a parameter, the greater the dielectric constant of the same conditions under the conditions of the current will be more, the corresponding insulation of this material The worse the performance. Therefore, in order to ensure that the insulation plate can have good insulation, to maintain its dielectric constant to a certain extent is very important.
3, resistance: This is used to determine the insulating plate electrical insulating board performance of one of the main indicators, insulation board insulation performance also need to identify it through. For the insulation product volume is strictly defined, according to the different needs of use, have different volume standards. In general, the larger the volume resistance, the greater the resistance of the surface.

The role of epoxy resin insulation board?

Epoxy insulation board is a kind of insulating material, he is generally used in transformers, electrical and other electrical equipment, mainly play a part of the separation of the role of separation. Therefore, the epoxy resin insulation board first has a high insulation and compressive strength, and can avoid the occurrence of leakage, breakdown and other accidents, followed by good heat resistance, can be 180 degrees in the case of high temperature deformation. In addition, we should also have good thermal conductivity, lightning protection, mechanical strength and other characteristics, we concluded that the epoxy resin laminated wood board has the following characteristics: he has the insulation strength, tensile strength, specific gravity, expansion coefficient And other characteristics.

We are usually referred to as the fire resistant cables tape is divided into epoxy insulation board 3240 insulation board FR-4 insulation board each product of different models of their different grades, we said the insulation board is divided into several grades refers to Insulation board insulation temperature, insulating material insulation and temperature are closely related. The higher the temperature, the worse the insulating properties of the insulating material. To ensure the bakelite electrical insulation board strength, each insulation material has a suitable maximum allowable operating temperature, below this temperature, can be used for long-term safety, more than this temperature will quickly aging. According to the degree of heat, the insulation material is divided into Y, A, E, B, F, H, C and other levels. For example, the maximum allowable operating temperature of Class A insulation is 105 ℃. Generally, the distribution transformer and the insulating material in the motor are mostly A grade, such as epoxy resin insulation board and so on.

How is the insulation board insulated?

electrical insulating board is not only used in power, but also applied to other areas, such as: high-speed rail, transformers, power distribution cabinets, banks, epoxy resin insulation board is made of glass fiber and insulation materials, There are other materials can not match the superiority.
First: the insulation plate has a good wayward, in the course of the use is not easy to break.
Second: compressed laminated wood has good insulation and high temperature resistance.
Finally: the insulation board has played a role in protecting the safety of the staff.

garolite g7 is a material that can prevent current from passing through. Its resistivity is very high, usually in the range of 10 ^ 9 ~ 10 ^ 22Ω · m. Breakdown voltage and electrical strength is one of the main indicators affecting the performance of g10 fiberglass tube, the following for everyone to introduce:
In a strong electric field under the destruction of insulating materials, loss of insulation into a conductive state, known as breakdown. The breakdown voltage is called the breakdown voltage (dielectric strength). Electrical strength is the breakdown of the voltage between the voltage and the two electrodes subjected to the applied voltage under the specified conditions, that is, the breakdown voltage per unit thickness. For insulating materials, the general breakdown voltage, electrical strength of the value of the higher the better.

unsaturated polyester glass mat sheet are also known as laminates, and there are many types of insulating laminates, including phenolic cotton laminates, epoxy glass cloth laminates, insulating paperboard, silicone glass cloth laminates, melamine glass cloth laminates, Glass cloth laminates, bismaleimide glass cloth laminates, polyimide glass cloth laminates, graphite glass cloth laminates, high strength epoxy glass cloth laminates, etc., referred to as insulation board.