Line long rod composite insulator with mandrel
Line long rod composite insulator with mandrel

Line long rod composite insulator core rod

Diameter 18~30mm injection mandrel parameters

volume density g/cm³     ≥2.1
water absorption wt%     ≤0.05
water diffusion mA     ≤0.3
stress corrosion h     ≥96
tensile strength Mpa     ≥1200
hot bending strength 143℃     ave≥250,min≥230
heat induced cracking temperature ℃     ≥170
dye penetration test min     >15
fiber content wt%     >75


Injection mandrel parameters greater than 40mm diameter

The mandrel above 40mm is usually used in the case of compression and bending stress, and the corresponding stress corrosion test is not specified. Generally, stress corrosion is not required. The bending strength of the hot state is also not specified. As requested by the customer, production can be made according to user agreement. 
tensile strength Mpa     ≥1000
heat induced cracking temperature ℃     ≥160
fiber content wt%     >75
volume density g/cm³     ≥2.1
water absorption wt%     ≤0.05
dye penetration test min     >15


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