Patent ID: 6114456
Filing Date: 2000-09-05
Classification: C08L

Abstract:
A process for producing a homogeneous blend of a first component comprising a low density polyethylene (LDPE) and a linear low density polyethylene (LLDPE) having a density of lower than 0.925 g/cm.sup.3 and a second component comprising a medium density polyethylene (MDPE) having a density of from 0.925 to 0.955 g/cm.sup.3, the process comprising the steps of:a) producing the first component comprising a low density polyethylene and a linear low density polyethylene having a density of lower than 0.925 g/cm.sup.3 using a first catalyst system which is other than a metallocene catalyst system;b) producing the second component comprising a metallocene catalyzed medium density polyethylene (mMDPE) having a density of from 0.925 to 0.955 g/cm.sup.3 using a second, metallocene catalyst system essentially consisting of a bis tetrahydro-indenyl compound, alone or in combination with another metallocene catalyst which contributes less than 80% by weight of said metallocene; andc) blending together the first and second components to form a homogeneous blend by physical means, the blend essentially consisting of from 2.5 to 70% by weight of mMDPE and from 30 to 97.5% by weight of LDPE and LLDPE.