Patent ID: 6194533
Filing Date: 2001-02-27
Classification: B65D,C08J,Y10S

Abstract:
A bulk container liner of 20 to 40 feet in length having a shape of rectangular parallelepiped bag obtained by gusseting a tubular inflation film from diameter direction toward center thereof and sealing both ends of longitudinal direction which is provided with an inlet to introduce a content therein and an outlet to discharge a content therefrom by means of heat sealing, wherein the liner is formed from a polyethylene (A) prepared by the use of a single site olefin polymerization catalyst and having:(i) a density of 0.922 to 0.938 g/cm.sup.3,(ii) a melt flow rate (ASTM D-1238, 190.degree. C., load of 2.16 kg) of 0.3 to 2.0/10 min,(iii) a melting point (Tm) of 117 to 135.degree. C., and(iv) a ratio of Mw/Mn of 1.5 to 3.5,wherein the polyethylene (A) is an ethylene/.alpha.-olefin copolymer comprising 75 to 95% by weight of ethylene and 5 to 25% by weight of an .alpha.-olefin having 3 to 20 carbon atoms, andwherein when the film is heat-sealed, the sealed portion has a tensile strength at break (Ts) of 2.0 to 4.0 kg/15 mm and a tensile elongation at break (EL) of 150 to 600%.