Abstract: Multilayer “barrier” films which have excellent Water Vapor Transmission Rate (WVTR) performance are prepared using a core layer which comprises a blend of two different high density polyethylenes (HDPEs) and a nucleating agent. The films are suitable for the preparation of packages for dry foods such as crackers and breakfast cereals.

Abstract: Disclosed is a produce package made from a gas permeable, non-perforated polyethylene film. The polyethylene film is made from a blend of a linear low density polyethylene and a high pressure low density polyethylene. The film has an absolute oxygen transmission rate that is greater than the weighted average of the absolute oxygen transmissions rates for film made from each blend component. Disclosed are polyethylene blends having densities above 0.910 g/cc that can be made into films with absolute oxygen transmission rates greater than 550 ccO2.mil/100 in2.24 hrs.

Abstract: Barrier films are prepared from a blend of two high density polyethylene blend components and a high performance organic nucleating agent. The two high density polyethylene blend components have substantially different melt indices. Large reductions in the moisture vapor transmission rate of the film are observed in the presence of the nucleating agent when the melt indices of the two blend components have a ratio of greater than 10/1. The resulting barrier films are suitable for the preparation of packaging for dry foods such as crackers and breakfast cereals.

Abstract: This invention provides a process for the stabilization of thermoplastic polyolefins during melt processing operations. The stabilizer package of this invention is “phenol free” and must contain at least one aryl monophosphite and at least one diphosphite. The process of this invention is especially suitable for the manufacture of polyethylene film.

Abstract: Novel polyethylene copolymer compositions prepared with a homogeneous catalyst system are characterized by having a unique high molecular weight, low comonomer (high density) fraction. These heterogeneous/homogeneous compositions may be prepared using a solution polymerization process in which the polymerization reactor contains a gradient in temperature, catalyst concentration or monomer concentration. The heterogeneous/homogeneous compositions of this invention are easily processed into films having excellent tear strengths and low hexane extractables.

Abstract: Novel polyethylene copolymer compositions prepared with a homogeneous catalyst system are characterized by having a unique high molecular weight, low comonomer (high density) fraction. These heterogeneous/homogeneous compositions may be prepared using a solution polymerization process in Which the polymerization reactor contains a gradient in temperature, catalyst concentration or monomer concentration. The heterogeneous/homogeneous compositions of this invention are easily processed into films having excellent tear strengths and low hexane extractables.

Abstract: “Cast” films having excellent puncture resistance and tear strength are manufactured from “pseudohomogeneous” linear low-density polyethylene resin. The preferred pseudohomogeneous resins used in the present invention are prepared with an advanced Ziegler Natta catalyst (having a magnesium component and a titanium component), preferably in medium pressure solution polymerization process. The films of this invention are especially suitable for “pallet wrapping” and for wrapping goods of unusual or uneven shapes and sizes.

Abstract: “Cast” films having excellent puncture resistance and tear strength are manufactured from “pseudohomogeneous” linear low-density polyethylene resin. The preferred pseudohomogeneous resins used in the present invention are prepared with an advanced Ziegler Natta catalyst (having a magnesium component and a titanium component), preferably in medium pressure solution polymerization process. The films of this invention are especially suitable for “pallet wrapping” and for wrapping goods of unusual or uneven shapes and sizes.