Patent ID: 6256966
Filing Date: 2001-07-10
Classification: C08J,C08L,Y10T

Abstract:
A process for making pouches filled with a flowable material, using a vertical form, fill and seal apparatus, in which process each pouch is made from a flat web of film by forming a tubular film therefrom with a longitudinal seal and subsequently flattening the tubular film at a first position and transversely heat sealing said tubular film at the flattened position, continuously filling the tubular film with flowable material above said first position, flattening the tubular film above a predetermined quantity of flowable material at a second position and transversely heat sealing said tubular film at the second position, the improvement comprising making the pouch from a film formed from a blend comprising a linear polymer of ethylene with at least one C.sub.4 -C.sub.10 alpha-olefin manufactured in a single-site catalyst polymerization process, and at least one of the followinga) a linear polymer of ethylene with at least one C.sub.4 -C.sub.10 alpha-olefin made by a multi-site catalyst polymerization process;b) a high pressure low density polyethylene, andc) additives; selected from the group consisting of: stabilizers, antiblock additives, and extrusion aids and the vertical form, fill and seal apparatus includes impulse sealing means for making transverse seals in the film through the flowable material.