The Effect of Extrusion Conditions and Material Properties on the Gas Permeation Properties of LDPE/LLDPE Silage Wrap Films

Gerry M. Mcnally (1) , Christopher Laffin (1) , P. D. Forristal , Padraig O'Kiely , Christopher M. Small (1)

1 QUB - Queen's University [Belfast]

This study investigates the effect of extrusion processing conditions and comonomer type on the gas permeation properties of LLDPE films containing polyisobutylene (PIB). The results show improved gas barrier properties with increasing polymer density and with increases in film crystallinity and orientation as a result of extrusion processing conditions such as blow-up ratios.

Mots clés: LLDPE; LDPE; blends; PIB; CO2 permeability; crystallinity; orientation; shrinkage

Gerry M. Mcnally, Christopher Laffin, P. D. Forristal, Padraig O'Kiely, Christopher M. Small. The Effect of Extrusion Conditions and Material Properties on the Gas Permeation Properties of LDPE/LLDPE Silage Wrap Films. Journal of Plastic Film and Sheeting, 2005, 21 (1), pp.27-38. ⟨10.1177/8756087905052770⟩. ⟨hal-00572055⟩