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Effect of Blend Ratio of h-LLDPE and LDPE on Tear Properties of Blown Films

  • K. Mezghani , S. Furquan , S. H. Tabatabaei and A. Ajji
Published/Copyright: April 6, 2013
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Abstract

In the present study, blown films of h-LLDPE, LDPE, and their blends were produced using a twin screw extruder. The tear properties of all films were determined in the machine direction (MD) and the transverse direction (TD). On one hand, similar values of the MD tear-resistance for the two virgin polymers, h-LLDPE and LDPE, were measured to be 100 and 120 kN/m, respectively. On the other hand, the TD tear-resistance value of h-LLDPE was 180 kN/m, four times higher than that of LDPE, 45 kN/m. It was observed that small additions of LDPE (5 to 20 wt.%) to h-LLDPE produced blends with better TD tear-resistance films, 400 kN/m. The main reason for this large increase in tear-resistance was attributed to the morphological changes induced by the addition of the LDPE polymer, as shown by SEM, FTIR, and birefringence techniques.


Mail address: Khaled Mezghani, Mechanical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia. E-mail:

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Received: 2011-10-13
Accepted: 2012-01-02
Published Online: 2013-04-06
Published in Print: 2012-07-01

© 2012, Carl Hanser Verlag, Munich

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