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Identification method of high quality silica gel: 1. Wear resistance: Abrasion resistance is the ability of the production and molding of silicone products, and the surface of silicone products can suffer from loss. Good silicone products generally have a surface that is rarely rubbed off by external factors, without affecting the appearance, text and color of the products.The surface characters of low-quality silicone products are easy to drop. 2. The elastic: Silica gel products have good elasticity, because high elasticity mainly comes from the movement of the molecular chain of silica gel, so when purchasing silica gel products, we first look at the elasticity of silica gel products to judge the quality. 3. Tear strength and tensile strength: Silicone products with high tear strength have prominent anti-damage ability, long life and are not easy to be interfered by the external environment. Generally, silicone products with low tear strength are prone to cracks in the tearing process, which will rapidly expand cracking and lead to damage when under stress. 4. Hardness and constant tensile stress: Hardness and tensile stress reflect the important indexes of rigid (rigidity) of rubber materials, both of which are the forces needed to produce certain deformation of silicone products.It is also a way to distinguish the quality of silicone products