Precision ceramic mechanical properties: density, hardness, surface resistivity, dielectric properties, tensile properties, impact properties, tearing properties, compression properties, bonding strength, wear resistance, low temperature properties, resilience performance;
Aging performance: heat aging, ozone aging, Hot Pressed Boron Nitride ultraviolet lamp aging, salt spray aging, xenon lamp aging, carbon arc lamp aging, halogen lamp aging;
Liquid resistance: lubricating oil, gasoline, engine oil, acid, alkali, organic solvent, water;
Combustion performance: vertical combustion, alcohol burner combustion, roadway propane combustion, smoke density, burning rate, effective combustion heat value, total smoke emission;
Applicable performance: hydraulic resistance, impulse test, electrical conductivity, water tightness, air tightness;
Production parameters: melt index, viscosity, mold shrinkage, melting temperature, etc. [3]
Conventional performance
Plastic ABS is non-toxic and tasteless, and its appearance is ivory translucent, or transparent granular or powdery. Density is 1.05~1.18g/cm3, shrinkage rate is 0.4%~0.9%, elastic modulus value is 2Gpa, Poisson's ratio value is 0.394, moisture Hot Pressed Boron Nitride absorption <1%, melting temperature 217~237℃, thermal decomposition temperature>250℃ .
Mechanical properties
Plastic ABS has excellent mechanical properties, its impact strength is good, and it can be used at extremely low temperatures; plastic ABS has excellent wear resistance, good dimensional stability, and oil resistance, and can be used for medium loads and low speeds. Bearing. The creep resistance of ABS is larger than PSF and PC, but smaller than PA and POM.
Thermal performance
The heat distortion temperature of plastic ABS is 93~118℃, and the product can be increased by about 10℃ after annealing. ABS can still show a certain degree of toughness at -40℃, and can be used in the temperature range of -40~100℃.
Electrical performance
Plastic ABS has good electrical insulation and is hardly affected by temperature, humidity and frequency, and can be used in most environments.
Environmental performance
Plastic ABS is not affected by water, inorganic salts, alkalis and many kinds of acids, but it is soluble in ketones, aldehydes and chlorinated hydrocarbons, and will cause stress cracking when corroded by glacial acetic acid and vegetable oil. ABS has poor weather resistance and is prone to degradation under the action of ultraviolet light; after half a year outdoors, the impact strength has dropped by half.
What are the inspection items for precision ceramics?
2020 12/22