Commonly used NMN Insulating material performance indicators are dielectric strength, tensile strength, specific gravity, expansion coefficient. Insulating paper is mainly used for low-voltage motor in the slot, slot and interphase insulation, in addition to other than the transformer or other electrical insulation between the layers.
mica tape for cable in the electrical equipment, the potential can be separated from the charged part of the different. Insulation paper material has a high insulation resistance and pressure strength, and to avoid leakage, breakdown and other accidents. Secondly, NMN insulation paper material heat resistance is better, to avoid long-term overheating and aging deterioration; In addition, there should be good thermal conductivity, resistance to lightning and high mechanical strength and process processing and other characteristics.

Insulation test method

With the nature of the relationship between the structure and properties of electrical insulating board, through a variety of analysis and testing methods, the microstructure and macroscopic structure linked. To study the characteristics of insulating materials, and its corresponding series of comprehensive properties.
With the rapid development of industry, the requirements of electrical equipment is getting higher and higher, to improve the motor stand-alone capacity, miniaturization of capacitors and high performance, are the development trend of electrical equipment. As the polyimide glass fiber directly determines the service life of electrical equipment and its advanced nature, therefore, in order to improve the development of insulating materials, opened up a new way, and the development of electrical insulation test technology, but also for the insulation technology research and application of the conditions The
Insulation materials on the test method according to the scope of application, is divided into general test methods, special test methods and application of test methods. In order to make the test results of insulating materials comparable to each other, no matter what the test method, require the technical requirements of the test method and operation of a unified, standardized, equipment, equipment, stereotypes. Any kind of test method should be easy to implement, and can be used in the required characteristics of the comparison.

anti static plastic sheet materials in many occasions, to withstand the role of a variety of mechanical stress, a constant, vibrating, thermal expansion and contraction cycle. These stresses can cause creep damage or fatigue damage.
DMD insulation paper material moisture will increase the conductivity, increase the loss. Water also dissolves many substances and accelerates the various chemical reactions that lead to aging. Acid, ozone, etc. can also lead to chemical aging. For some insulating paper materials, tree branches may occur at very low electric field due to the presence of moisture (see solid dielectric breakdown). In addition, in the hot zone, insulating paper materials will be subject to a variety of microbial damage, the so-called microbial aging.
In the outdoor use of phenolic paper sheet materials, often by direct sunlight, under the action of ultraviolet light will occur aging. In the nuclear reactor, X-ray devices used in the insulating paper material by radiation, will occur aging.

g10 fiberglass tube with excellent flexibility and flexibility, and good dielectric and chemical resistance, suitable for motors, electrical appliances, meters, radio and other equipment, wiring insulation and mechanical protection.
The conductor structure of the insulated tube has two kinds of cable type and guide rod type. Through the cable using the transformer cable directly through the casing, easy to install. When the working current is greater than 600 amps, wear cable structure is more difficult to install, the general use of pole structure.
epoxy fiberglass tube often oil or gas as insulating medium, generally made of transformer casing or circuit breaker casing, commonly used in the following 35 kV voltage level. Insulated tube conductor and porcelain sets of the cavity, filled with transformer oil, from the radial insulation. When the voltage exceeds 35 kV, set the conductor on the conductor or envelope cable to strengthen the insulation. Mainly used for ultra-high voltage transformers and circuit breakers.
The use of insulating pipe can also greatly reduce the corrosion of equipment and other accessories such as corrosion damage, but also to extend the working life of the equipment out of a force.

In simple terms DMD insulating paper is a layer of polyester film coated with adhesive, one side for the polyester fiber non-woven composite, calendering from a composite insulation products, generally referred to as DMD.
DMD insulation paper good performance are: high mechanical strength, good dielectric properties and high heat resistance, Y series motor is the stereotypes of insulation materials, in the small and medium-sized motor slot insulation, inter-turn and interlayer laminated mica sheet, Insulated heart and transformer insulation has been widely used.

High temperature insulation materials of the four patience

High temperature fire resistant cables tape in the automotive parts, semiconductor industry, aerospace industry, petrochemical industry, machinery industry, medical industry, electronic appliances, etc. are widely used, mainly because it has the following patience:
1, high temperature performance: glass transition temperature up to 143C, melting point of 343C, filled with GF or CF, the heat distortion temperature of up to 315C or more, long-term use temperature of 260C.
2, hydrolysis resistance: long-term high temperature steam and hot water immersion is still able to maintain good mechanical properties, all resin resistance to hydrolysis of better varieties.
3, chemical resistance: In addition to high concentrations of concentrated sulfuric acid and other strong oxidizing acid erosion, high temperature insulation material has similar to the resistance of PTFE resin, and in a variety of chemical reagents can completely retain its mechanical properties, Is a more excellent anti-corrosion materials.
4, resistance to radiation and weather resistance: insulation transformer pressboard on a variety of radiation has excellent resistance, can withstand γ radiation and maintain its various characteristics, can be applied to a variety of harsh environments.

DMD insulation cable paper is used as cable, coil and other electrical equipment, insulation materials. In addition to a good insulation properties and mechanical strength, but also have their own characteristics. In addition, we can observe the law, to determine the quality of insulating paper.
First of all, look at the description of DMD insulation paper, see insulation resistance, leakage current and other insulation characteristics of the parameters, because these parameters are used to determine the dielectric material insulation performance of the main parameters, when the insulating paper impurities and moisture content, The conductivity will increase, resulting in increased leakage current value.
DMD insulation paper products in a variety of transformers (including open ventilation dry, casting coil and liquid type), can have a variety of applications: wire winding, insulation, segment and box insulation, winding end Packing, partition and bar.
In open-air dry-type transformers, DMD insulation paper can greatly improve the design of such transformers, reduce electrical losses, improve standby capacity, increase safety and reliability, and reduce the amount of steel conductor and core, thus reducing size, cost.

Insulation material industry will also be a new step

electrical insulating board as a basic material, a wide range of applications, such as the national economic lifeline of the power industry, its development and high-performance insulation materials are closely related. Insulation material is to ensure that electrical equipment, especially power equipment can be reliable, lasting and safe operation of the key material, its level will directly affect the power industry development level and quality of operation. And it plays a very important role in improving the overall level of national industry and promoting the stable and rapid development of national economy.
With the economic development, China's transmission line of the highest voltage level will be increased from 500kV to 750kV or 1000kV, and the transmission line voltage level for each step up, power equipment insulation system should be a corresponding increase. There is no high-performance insulation materials to ensure that from the power generation, power transmission to all the electricity system is likely to occur local power grid instability, serious will make the entire power grid paralyzed. Therefore, in the protection of power generation, power transmission, electrical equipment operation reliability and stability, the advanced nature of insulation, stability has a very important significance.
For the defense, the military equipment in the power, control, communications, radar and other systems need insulation materials, to develop new military equipment, must also have a new type of insulating material for the pilot. Such as nuclear submarines require the use of anti-salt spray, moisture, mildew, radiation-resistant anti static plastic sheet, such as aerospace aircraft need high dimensional stability, low temperature, radiation-resistant insulation materials. If the insulating material can not meet the harsh conditions of these harsh use of the environment, will lead to military equipment in many important systems can not function properly.

Characteristics of 3240 Epoxy Plate and Its Application

As a widely used material, epoxy board in a variety of circuits have a wide range of applications. This is concerned, it is necessary to talk about the application of a wider range of 3240 epoxy board, and it is a kind of electric glass cloth impregnated with epoxy resin, dried, hot pressed from the material, which has yellow, white, green Points, at room temperature 130 ℃ also has a high mechanical strength, but also in the dry, wet state of transformer pressboard is very good, can be flame retardant, electrical, electronic and other industries in the use of insulating structure parts. In addition, 3240 epoxy board also has the following characteristics:
Synthesis: is a special non-alkaline glass fiber cloth impregnated with epoxy phenolic resin, after baking, hot and thus made.
Thickness: Under normal circumstances 0.5 ~ 50mm, can also be required to produce 50 ~ 150mm thick plate.
Performance: mechanical and dielectric properties are relatively high, and heat resistance and moisture resistance are better, and a good mechanical processing, heat-resistant grade is B, can be stamping. After curing the epoxy resin system has excellent mechanical properties, medium temperature under the machine high strength, high humidity electrical stability under the good.
Electrical: After curing the epoxy resin system is a high dielectric properties, resistance to surface leakage, resistance to arc of the excellent polyimide glass fiber.
Uses: machinery, electronics, electrical use. Applicable to machinery, electrical, electronics, electrical and other fields. Also used for insulation processing parts, or processed into various types of insulation accessories, equipment, such as insulation components.

Analysis on Industrial Chain Structure of CCL and Insulating Materials Industry

As an intermediate application of products, CCL and bakelite electrical insulation board industry is also limited by the upstream and downstream industry constraints. In general, if the upper and lower industries have a greater volatility, will have an impact on the development of our industry. So, for these two closely related industries, now the development of the status quo is what?
 First, the upstream industry development status quo
Often, we are exposed to the upstream industry for glass fiber cloth, epoxy resin, electrolytic copper foil and other industries, the industry's products related to glass fiber cloth, copper foil, alumina and epoxy resin / modified resin. In the case of economic fluctuations, but also on the impact of raw material prices, which also affected the varying degrees of CCL and insulation materials production progress.
Second, the downstream industry development status
Our downstream industry mainly PCB industry, LED industry and mica insulation sheets, rail transportation and other industries. Our products are widely used in computer, communications, consumer electronics, industrial / medical, military, semiconductors and automobiles. The printed circuit boards are widely used in the production of printed circuit boards. And other industries, almost involving all electronic information products. Among them, the computer, communications and consumer electronics is the three main applications, accounting for the PCB industry output value of about 70%. In addition, all kinds of insulating materials are directly used in the production of insulation assembly, terminal customers include electrical and electronic, instrumentation, computer, communications, consumer electronics and transportation and other fields.

What are the key factors in determining the performance of insulating materials?

Various types of NMN Insulating material are often used in various circuit facilities. However, for different areas of use, the performance of the selected insulating material is different. So what is the key factor in the performance of a constant insulating material?
 First, the breakdown voltage, electrical strength: in a strong electric field under the destruction of insulating materials, insulation ladder loss of insulation properties lead to conductive state, known as breakdown. The breakdown voltage is called the breakdown voltage. The electrical strength is the breakdown of the voltage at the time of breakdown under the specified conditions and the distance between the two electrodes serving the external voltage, that is, the breakdown voltage of the unit thickness. For insulating materials, the general breakdown voltage, electrical strength of the value of the higher the better.
Second, the ignition resistance: With the increasing application of insulating materials, the requirements of its fire points are also getting higher and higher. Many manufacturers are beginning to use a variety of ways, and constantly improve the resistance of crepe paper tubes. The higher the ignition resistance, the security will be better.
Third, the arc resistance: in the provisions of the implementation of the conditions, the insulation material to withstand the arc along the surface of the ability to touch. The use of interchangeable high-pressure small current, by high pressure in the arc between the two electrodes caused by moving, so that the surface of the insulating material to the conductive layer of the time required to determine the arc resistance of mica insulation tape. In general, the greater the time value, the better the arc resistance.

Why the insulation temperature of different insulation materials will be different?

For different grades of diamond dotted paper, the ultimate operating temperature will be different. Therefore, in many electrical installation, also need to take into account the entire circuit can withstand the maximum temperature conditions. When there are special circumstances, some important materials can withstand high temperatures, but also to measure the stability of the entire electrical device key. For the insulation of several common insulation class, like the A-class limit operating temperature of 105 ℃, but its maximum allowable temperature is only 90 ℃. The reason why these two temperature values ​​will be different, mainly due to the following reasons:
    1, thermometer method. The measurement results reflect the local surface temperature of the winding insulation. This number is averaged about 15 ° C lower than the actual maximum temperature of the winding insulation, the "hottest". The law is the simplest, in the medium and small motor field application of the most extensive. For low-resistance windings, this method is more accurate than the resistance method. As the mercury thermometer in the alternating magnetic field due to eddy current loss heat, so the use of alcohol in the AC motor thermometer.
    2, resistance method. The measurement results reflect the average value of the entire winding copper temperature. The number of the actual maximum temperature according to the different phenolic laminated sheet level reduced by 5 ~ 15 ℃. The method is to measure the cold and thermal resistance of the conductor, according to the formula to calculate the average temperature rise.
    3, embedded detection thermometer test copper or platinum resistance thermometer or thermocouple embedded in the winding, the core or other needs to measure the expected temperature of the highest parts. The measurement results reflect the temperature at which the temperature measurement element contacts. Large motors often use this method to monitor the operating temperature of the motor. In the range of 100 ~ 200 ℃ copper or platinum resistance thermometer is more accurate, and thermocouple is not commonly used.
    In addition, the closed fan cooling motor resistance method measured by the temperature measured by the thermometer method of 0 ~ 15% higher; protection of 10% to 20%. While the resistance method and the embedded copper resistance thermometer difference of ± 5%. Therefore, the various measured methods measured by the temperature and the actual maximum temperature difference, and can not really reflect the flexible composite materials of insulating materials, so the insulation material should be "limit the operating temperature" minus the difference is "Maximum allowable operating temperature".

Common Defects and Solutions of Adhesive Tape in Epoxy Plate

As one of the DMD insulation paper in the epoxy board, the quality of the adhesive sheet will directly affect the quality of CCL. For many production targets unqualified products, in the follow-up processing can also be adjusted to make up, but the subsequent production process will bring greater difficulty and inconvenience. Usually the surface of the adhesive film is smooth, no resin particles, bubbles, discount, fish eyes, exposed cloth pattern, yarn breakage yarn, yellow lines, impurities and other defects, and resin content, gel time, volatile content Technical indicators are to meet the requirements of the process requirements. In contrast, the poor quality of the adhesive sheet is much more, then what should we take remedial measures?
First, too much surface particles
The main reason for this defect is that the resin does not sufficiently penetrate into the cloth and forms a granular attachment on the surface. As the hardness of colloidal particles than the copper foil in the process of copper cladding in the corresponding point of the copper foil will be subject to extrusion extension thinning, may cause the printed circuit board is reflected in the appearance of copper foil surface highlights, As the bright spots on the copper foil surface of the antioxidant layer is destroyed, the product at the time of storage is easy to be oxidized or even the formation of corrosion points, greatly reducing the product storage cycle.
Second, glue marks
The main reason for the occurrence of glue marks is the resin content is too large, soaked glass fiber cloth through the measuring roller vertical into the oven, there is liquidity in the liquid due to the impact of gravity on the surface of the cloth to form strip marks. The presence of the marks will have a certain impact on the flatness and warpage of the CCL. In this case, the resin content of the adhesive sheet should be adjusted in time.
Three bubbles
There are two main reasons for the occurrence of bubbles, when the glue is not fully infiltrated into the gap, the air in the gap is not discharged, when the glue was covered with glue in the cloth. When the furnace into the oven due to heat, the residual air expansion in the mica tape for cable surface to form bubbles; dipping tank in the plastic bubble generated by the bubble floating on the surface of the glue, the measuring roller does not completely spread the bubble on the cloth.

The role of insulation material tube is in the electrical equipment to the potential of different charged part of the isolated. Therefore, the insulation material should first have a high insulation resistance and compressive strength, and to avoid leakage, breakdown and other accidents. Second, the heat resistance is better, to avoid long-term overheating and aging deterioration; In addition, there should be good thermal conductivity, resistance to lightning and high mechanical strength and process processing and other characteristics. According to the above requirements, commonly used insulating material performance indicators are dielectric strength, tensile strength, specific gravity, expansion coefficient.
Electrician commonly used mica insulation tape according to their different chemical properties, can be divided into inorganic insulation materials, organic insulation materials and mixed insulation materials. Commonly used inorganic insulation materials are: mica, asbestos, marble, porcelain, glass, sulfur, etc., mainly used for motors, bakelite sheet suppliers, switch the bottom plate and insulators. Organic insulating materials are: shellac, resin, rubber, cotton yarn, paper, linen, rayon, etc., mostly used to manufacture insulating paint, winding wire wound insulation and so on. Mixed insulation materials for the above two kinds of materials through the processing of various molding insulation materials, used as electrical appliances of the base, shell and so on.

The researchers said that the researchers chose the chemical nature is very stable, almost no impurities containing potassium tantalate as an insulating material, and then the solid insulation material placed in an ionic liquid, the surface of the insulating material will spontaneously form an electric double layer. In this electric field effect, the electrical insulating board has a superconductivity, in the absolute temperature of 0.05 open (minus 273.1 degrees Celsius) environment to achieve a zero resistance.
It is reported that the research and development of superconducting materials to the main use of two major methods, one is mixed with several kinds of metal metallurgical methods, and the other is the insulator as the main material mixed with impure chemical method, the most representative of the copper Oxide high temperature superconducting material.
The use of electric field effect of the method can be described as the development of superconducting materials, a new means, it can make potassium tantalate such as the original people that can not become mica insulation sheetsl has a superconductivity for the future development of higher critical temperature of the new Superconducting materials laid the foundation.

G11 insulation board is actually insulation board insulation material in a type only, G11 is a class of garolite g7 division. Insulation board in fact there are FR4 insulation board, G11 insulation board, and so on all types and grades of insulation materials. g10 fiberglass tube is mainly used for electronics, electrical industry, has a good insulation performance, in a variety of harsh environments is still able to maintain a good working condition.
pe mica tape has the advantages: its insulation performance is good, there is a certain high temperature resistance, high mechanical properties, with moisture resistance, as well as dielectric properties and so on. Its high temperature resistance can reach 288 degrees of high temperature, but also a normal and stable work.
Specific scope of application: electronic, electrical equipment in the insulation baffle, transformers need to use the insulation board, electronic switch insulation objects, fiberglass meson, precision test panels, as well as precision planetary gears, etc. need insulation and The use of its own characteristics of the various industries and objects.

GPO3 sheet is a very good performance of the fire resistant cables tape, because it was so widely used, so that the counterfeiters will be more on-site market, there are too many fish mixed with GPO-3 insulation materials, although all Close to the GPO-3 label, but the performance is indeed a world of difference. Good insulating material can be safe and efficient for us to use, you can fake and shoddy products but there are many security risks. Below the unsaturated polyester glass mat sheet manufacturers teach you to identify the true and false GPO-3.
Method 1, genuine GPO-3 are required through the US safety laboratory certification (UL certification), with independent and unique UL identification code. So when you buy this kind of insulating material GPO-3 must see if there is no UL identification code, or let the business to provide UL identification code.
Method 2, genuine GPO-3 its resistance to leakage index can reach 600V, you can test it, or let the business to provide indicators.
Method 3, authentic GPO-3 insulation material density is between 1.81-1.83, must be in accordance with national standards, the middle must be no filler, so be sure to see.

Different electrical equipment requirements for the performance of GPO3 sheet are focused. High-voltage electrical equipment such as high-voltage motors, high-voltage cables and other insulation materials require high breakdown strength and low dielectric loss. Low-voltage electrical appliances, such as mechanical strength, elongation at break, heat-resistant grade as the main requirements.
The macroscopic properties of fire resistant cables tape such as electrical properties, thermal properties, mechanical properties, chemical resistance, weather resistance, corrosion resistance and other properties are closely related to its chemical composition and molecular structure. Inorganic solid insulation material is mainly composed of silicon, boron and a variety of metal oxides, mainly to the ionic structure, the main features of high heat resistance, the working temperature is generally greater than 180 ℃, good stability, resistance to atmospheric aging, Chemical properties and long-term under the action of the electric field aging performance; but high brittleness, low impact strength, high pressure and low tensile strength; poor process. Organic materials are generally polymers with an average molecular weight between 104 and 106, and their heat resistance is usually lower than that of inorganic materials. Contains aromatic rings, heterocycles and silicon, titanium, fluorine and other elements of the material heat resistance is higher than the general line of chain polymer materials.
An important factor affecting the dielectric properties of unsaturated polyester glass mat sheet is the strength of the polar and the content of polar components. The dielectric constant and dielectric loss of the polar material are higher than those of the non-polar material, and the impurity ions are easily adsorbed to increase the conductivity and reduce the dielectric properties. Therefore, in the insulation material manufacturing process should pay attention to clean, to prevent pollution. Capacitors require a high dielectric constant to improve their specific properties.

In the electricity process, people note that the size of the cross-sectional area of ​​the power cord material on the safe use of electricity have an impact, but often the use of vpi mica tape is not enough attention. Power lines are now more and more complex, walking under the wood floor, walls, partitions and damp underground or water are, if the insulation tape used improperly, will produce leakage, endangering personal safety or cause a fire. So how do you use insulating tape correctly?
Power cord connector is divided into "ten" word connection, "one" word connection, "Ding" word connection and so on. Joints should be wrapped around, smooth without thorns. Before the thread is disconnected, it should be wiped with a steel wire, and then wound around the mouth, and then swing around, the thread will be quickly in the connector at the break. If the joints in the dry place, should first use insulated black cloth wrapped two layers, and then wrapped plastic tape (also known as pvc adhesive tape) two layers, and then J-10 mica insulation tape stretched about 200% Finally wrapped two layers of plastic tape.
Because the direct use of plastic tape a lot of defects: plastic tape a long time easy to glue dislocation, plastic open, electrical load heavy, the joints heat, plastic tape easy to melt shrink; electrical connectors in the junction box with each other pressure, Easy to stamp the plastic tape, etc., these risks directly endanger personal safety, causing the line is moderate, causing a fire. The use of insulating black tape will not appear above, it has a certain strength, flexibility, can be tightly wrapped around the long-term, by the time and temperature and dry fixed type, will not fall off, and flame retardant. Moreover, wrapped with insulated vinyl tape and then wrapped with moisture, rust.
Of course, bakelite sheet suppliers is also defective, although it is waterproof but easy to break, so the last need to wrap two layers of plastic tape for the protective layer, connector and connector insulation self-adhesive tape non-stick, better performance.

 Electronic and compressed laminated wood plastics is used in the field of electrical and electronic engineering plastics insulation materials, conductive plastics, pressure / thermoelectric plastic and its selection and product design and manufacturing technology. The amount of plastic consumed by the electrical and electronic industry accounts for the third largest total volume of plastics, second only to the packaging and construction industries. The following electronic components and connectors to introduce plastic as an insulating material in the electrical and electronic industry on a number of applications.
Electronic Component:
insulation material tube are generally connectors, coils, induction components as the center, including filters, oscillators, keys and other components. The integration of these components and the emergence of surface decoration technology (SMT), so that the added value of electronic products greatly improved.
Connector:
The connector can be manufactured using a variety of materials such as PA, PBT, PET, etc., where the cost of using PA-made connectors is low. For example,  EPGC204, processing fluidity is good, can be used for the production of thin-walled parts. With the diversification of parts, the dimensional stability and heat resistance requirements higher, the choice of PBT materials, in the special requirements of the connector can be made of PC material. Of course, PPS and LCP reinforced plastics with better heat resistance are also ideal targets.