Glass fiber has high tensile strength and low elongation (3%), and the testing methods and standards include: GB/T14338-1993 Test Method for the Curling Property of Synthetic Short Fibers, GB/T 15232-1994 Determination of Tensile Breaking Strength of Textile Glass Fiber Felts, GB/7689.5 Determination of Tensile Breaking Strength and Breaking Elongation of Glass Fiber, GB T15232-1994 Determination of Tensile Breaking Strength of Textile Glass Fiber Felts, GB/T 7689.5-2001 | Testing methods for reinforced materials and woven fabrics: Determination of tensile breaking strength and elongation at break of glass fibers, etc. The single fiber strength and elongation performance test should use a high-strength and high modulus fiber strength tester that can test glass fibers.