1, the tensile strength: refers to snap the unit cross-sectional area of specimens used in the process of the biggest force
2, Elongation: refers to the process of tensile specimens pilot piece than the original percentage of elongation
3, tear strength: refers to tear the unit cross-sectional area of specimens used in the process of the biggest force
4, transparency (CI) : refers to the maximum thickness, TPU products can through the unit is mm, said CI in the industry
5, yellowing resistance: refers to the intensity of uv light irradiation to set time, compared with the same sample, color difference discrimination, according to the standard color card change is smaller, the higher the level.
6, good wear resistance: refers to the sample on the abrasion machine grinding regulation range, sample loss of quality (weight), the unit is mg.
7, folding: refers to the regulation of temperature, sample back and forth on the folding machine folding 60 degree Angle, when the sample cracks in reading. Folding into folding under normal temperature and low temperature resistance to fold.
8, hardness: is folding products surface degree of hardness and softness, commonly used shore A and shore D
9, resilience: refers to the standard objects free fall onto the specimen in a certain height, the height of the springback.
10, compression permanent deformation: refers to the specimen under compression to a certain height, after a certain temperature and time, from the height of the specimens to the external force free response compared with the original height
11, liquidity: refers to the TPU under a certain temperature after melting, the quantity of per unit time through the glass tube.
12, viscosity: refers to a certain temperature, TPU after melting, stop the flow of material properties under stress.