Cable sheath thermal stretching, heat deformation test method and detailed instructions
A, the purpose of the test
Hot stretch is assessment of rubber insulation and sheath insulation materials in plastic deformation under the action of heat load and permanent deformation of a testing method, much higher than the applicable temperature test under the condition of temperature and a certain weight, after a short time of thermal aging of elongation change to plastic deformation and permanent deformation of a test. If under the action of heat and load deformation, mechanical properties, can be lost to cause short circuit, cable can't normal use.
