PU color paste manufacturers introduce the characteristics and testing items of PU materials to you
1. Characteristics of polyurethane elastomers: wear resistance, wide hardness range, high strength, oil resistance, high bearing capacity, good vibration absorption performance, low temperature resistance, radiation resistance and ozone resistance, mold resistance, biomedical properties Polyurethane coating Layer materials are widely used in the textile and garment industry. At present, there are mainly problems such as poor moisture permeability, hardening at low temperature, easy hydrolysis and aging, and not suitable for long-term storage. The hemp stalk core has the properties of well-developed micropores, moisture absorption and moisture conduction, antibacterial, UV resistance, adsorption and reaction.
2. Main testing items: apparent density, haze, yellowness, whiteness, swelling ratio, water content, acid value, melting point, hardness, impact strength, tensile properties, melt index, viscosity, mold shrinkage, melting temperature Wait.