Metastar meta-aramid paper can be divided into meta-aramid paper for electrical insulation (YT5 10, YT5 16, YT51,YT564) and meta-aramid paper for honeycomb core material (YT8 12, YT).
Meta-aramid paper for electrical insulation has UL-certified temperature resistance grade 2 10℃, and the mechanical and electrical products made of it can reach the temperature resistance insulation grade H( 180℃) or above. Because aramid paper does not deform or melt at high temperature, the ability of mechanical and electrical products to temporarily withstand overheating and overload is improved. Using aramid paper as insulation material can make mechanical and electrical products compact and durable, and the volume and weight are greatly reduced. Aramid insulation paper is mainly used for: insulation materials between coils and windings in transformers, insulation materials of insulating sleeves, parts, wires and joints; Insulation materials for coil windings, slots, phases, turns and line terminals in motors and generators; Cable and wire insulation, nuclear power equipment insulation materials, etc. Representative products are dry-type transformers, locomotive traction motors, coal mine underground motors, microwave oven transformers and so on.
Meta-aramid paper is mainly made of aramid paper honeycomb core structure, which has the characteristics of light weight, impact resistance, high strength and aging resistance. Mainly used in aircraft, missiles, satellite broadband wave-transparent materials, large rigid secondary stress structural parts (wings, fairings, cabin linings, aircraft doors, floors, cargo holds and partitions). Pure aromatic polyamide component
1)metastar aramid paper consists of 100% aramid fiber (MPIA/PPTA).
2) The "Tametar" and "Taparan" aramid fibers specially supplied by Yantai Taihe New Materials Co., Ltd. provide raw material quality assurance for Metastar aramid paper. 1) has excellent inherent flame retardancy.
Metastar aramid paper inherits the essential flame retardant characteristics of aramid fiber, that is, it can achieve ideal flame retardant effect without adding any flame retardant. The limiting oxygen index (loi) of Metastar aramid paper is more than 28%; According to UL certification, the flame retardant grades of Metastar aramid paper are VTM-0 and V-0.
2) The ultra-low chlorine content adapts to the trend of environmental protection and halogen-free.
According to SGS test, Metastar aramid paper YT5 16 meta aramid paper does not contain halogen elements such as fluorine, bromine and iodine, and the chlorine content is controlled below 400PPM, which is far below the limit of 900PPM required by international halogen-free requirements, thus adapting to the international halogen-free environmental protection trend.
3)RoHS and RoHS2.0 are nontoxic.
According to SGS report, Metastar aramid paper has not detected ten toxic and harmful substances required by EU RoHS and RoHS2.0 directives. In addition, Metastar aramid paper does not contain phthalate esters, polycyclic aromatic hydrocarbons, perfluorooctane, perfluorooctanoic acid, tetrabromobisphenol A, hexabromocyclododecane, dimethyl fumarate, polyvinyl chloride and other harmful substances of concern to the electronics industry.
4) It is more reassuring to update detection synchronously with SVHC of REACH.
On 20 1 10, SVHC (substances of very high concern List), which represents the latest environmental protection requirements of the European Union, officially released five batches of ***53 harmful substances. Metastar aramid paper conducted additional tests for updating the list in a timely and synchronous manner. After SGS testing, at present, 53 harmful substances have not been found in Metastar aramid paper, so that customers can rest assured. 1)UL certified high temperature resistance.
According to UL certification, the relative temperature index (RTI) of Metastar aramid paper is 265,438+00 degrees Celsius, which indicates that the performance of the product is less than 50% after continuous use at 265,438+00 degrees Celsius for ten years, and it has good high temperature resistance.
2) Sufficient mechanical strength and processing adaptability
Metastar aramid paper has compact structure, smooth surface, good flexibility, good tensile and tear resistance, and can adapt to high-speed processing conditions when covered with electromagnetic wires.
3) Electrical insulation stability at high temperature and moderate humidity.
The experimental data in an independent laboratory show that the dielectric strength, relative dielectric constant and dielectric loss of Metastar aramid paper are not affected by the temperature and humidity below 60%RH. Liquidation is relatively stable.
4) Excellent paint absorption and dielectric compensation.
Metastar aramid paper impregnated insulating paint has good performance, fast paint absorption speed, high saturation, good uniformity and no air residue. After impregnation, the electrical strength is greatly improved, which can fully meet the manufacturing and use requirements of transformers, motors and other electrical appliances.
5) Low operating loss characteristics
Metastar aramid paper has lower relative dielectric constant and dielectric loss factor, which can make the distribution of insulation electric field more uniform, reduce the loss of operating medium and greatly reduce the live running loss of electrical appliances.
6) Unique chemical corrosion resistance stability
The data of independent laboratory tests show that the appearance, electrical properties and mechanical properties of Metastar aramid paper have not changed much after being soaked in ethanol, acetone, toluene, xylene, silicone oil and 25# transformer oil for ten weeks, which indicates that Metastar aramid paper has good stability to the above chemicals. 1) lightweight high-strength honeycomb substrate
After meta-aramid paper is made into honeycomb structure material, it is characterized by light capacity (meta-aramid paper honeycomb is 50% lighter than aluminum honeycomb and para-aramid paper honeycomb is 20% lighter than meta-honeycomb), high specific strength and specific stiffness (its specific stiffness is 9 times that of steel) and strong impact resistance. On the premise of ensuring sufficient strength, the weight of structural parts can be greatly reduced, which meets the requirements of light weight and energy saving of aviation and high-speed rail at present.
2) that prepare honeycomb is flame-retardant and nontoxic.
The test shows that the honeycomb made of Metastar aramid paper has strong flame retardant ability, does not produce molten droplets and does not release toxic smoke, which can effectively protect personnel safety.
3) High temperature resistance and high dimensional stability.
In the temperature range of -80℃ to 200℃, Metastar aramid paper can maintain good dimensional stability, and will not cause internal tensile damage due to strong thermal expansion and cold contraction of metal materials, which has strong structural safety guarantee ability for aircraft and trains.
4) Anti-radiation can be used for long-term flight.
Metastar aramid paper has excellent resistance to β, γ and ultraviolet radiation. For example, when the cumulative amount of beta rays reaches 1000Mrad, its intensity remains basically unchanged. In the flight atmosphere and space environment with strong cosmic rays, the radiation stability of Metastar aramid paper is more suitable for making structural parts of space vehicles.
5) The molecular structure is stable and not easy to corrode.
The molecules of Metastar aramid paper are front-end macromolecules composed of aryl groups interconnected by amide bridges. In its crystal, hydrogen bonds are arranged on two planes, forming a three-dimensional structure of hydrogen bonds. Because of the strong hydrogen bond, it has stable structure, excellent chemical resistance, tolerance to most high-concentration inorganic acids and stability to most other chemical reagents and organic solvents.
6) Excellent wave-absorbing performance, suitable for radar stealth.
Metastar aramid paper has good electromagnetic wave permeability, and the honeycomb structure made of it can absorb electromagnetic waves through special design, which is helpful for aircraft to be invisible in radar.