MECHANICAL PROPERTIES OF RAMIE/LLDPE LAMINATE

The effect of molding conditions and pretreatment of ramie with alkali or silane on mechanical properties of ramie weave/LLDPE laminate is studied in this paper. The results show that the laminate, molding at 140 ℃ with a pressure of 7.35 MPa, has optimal mechanical properties. In comparison with untreated ramie, the tensile strength is increased from 51.0MPa (untreated) to 102.6, 83.6MPa and 89.8MPa respectively in case the weave used has been pretreated with alkali, KH-550 or A-151; the flexural strength, flexural modulus, total impact energy per unit area and dynamic flexural strength amount to 81.6 MPa, 6.01 GPa, 37.8 kJ/m² and 106 MPa from 23.1MPa, 1.58 GPa, 30.9 kJ/m² and 31.1 MPa.