PU: Abbreviation for polyurethane, Chinese name for polyurethane, called polyurethane, polymer polyurethane synthetic material. Various physical properties such as density, elasticity and stiffness can be obtained by simply changing formula. At present, it has largely replaced fiberglass insulation materials, wood, and traditional rubber products.
Advantages: high hardness, wear resistance, good elasticity, comfortable and easy to wear; oxidation resistance, bending resistance, wrinkle resistance, chemical resistance; excellent shock absorption, anti-slip properties; good heat resistance; Corrosion has a beneficial effect on environment. protection.
Disadvantages: strong water absorption, yellowing easily, tearing easily, poor extensibility, not waterproof, easy to rot at bottom, poor air permeability.
EVA: vinyl acetate copolymer, polymeric material.
Advantages: light weight, good elasticity, good elasticity, no wrinkling, excellent dyeability, suitable for various climatic conditions, low cost.
Disadvantages: they easily absorb water, easily get dirty, very poor anti-slip, when wet, soles look like on roller skates.