Testing items include mechanical performance, physical performance, thermal performance, electrical performance, combustion performance, reliability performance, and others. Regular inspection items: mechanical properties, tensile properties, bending properties, impact properties, compression properties, tear resistance, shear properties, hardness, fatigue properties, creep properties, friction properties, wear resistance, dynamic mechanical properties, compression deformation, low-temperature embrittlement temperature, static stiffness, dynamic stiffness, Poisson's ratio, Young's modulus, ring stiffness, ring flexibility, aging coefficient, etc. Physical performance specific gravity, permeability (oxygen permeability, water vapor permeability, nitrogen permeability, etc.), water absorption, surface performance (roughness, surface energy, contact angle, etc.), optical performance (whiteness, chromatic aberration refraction, transmittance, index, ultraviolet transmittance, far-infrared transmittance, far-infrared transmittance, etc.), ash, solid content, viscosity, gel time, glass fiber content, carbon black content, gel content, shrinkage, dispersity, etc. Thermal properties: thermal deformation temperature, Vicat softening point, glass transition temperature, melting temperature, crystallization temperature, recrystallization temperature, cracking temperature, linear expansion coefficient, relative temperature index RTI, thermal conductivity (hot wire method, laser scattering method, flat plate heat flux meter method, steady-state method, etc.), melt index, tolerance, specific heat capacity, oxidation induction time, loss angle, dynamic modulus, energy storage modulus, loss modulus, softening point, etc. Electrical performance: surface resistance, conductivity, surface resistivity, volume resistance, volume resistivity, insulation resistance, dielectric constant, dielectric strength, breakdown voltage, loss angle tangent, electrical strength, arc resistance, leakage marking, shielding effectiveness, etc. Combustion performance UL94 horizontal flame retardancy (HB, HF1, HF2), UL94 vertical flame retardancy (V2, V1, V0, 5VB, 5VA), oxygen index, combustion heat value, smoke toxicity, smoke density Combustion performance of building materials and products (GB/T 8624& GB/T20284 A1, A2, B1, B2, etc.)

Inspection Items

GB/T2951.14-2008