Resources Contact Us Home
Propylene polymers for films

Image Number 10 for United States Patent #6583227.

This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in film applications. Specifically, this invention relates to crystalline propylene polymers comprising both propylene homopolymer and propylene copolymer. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional propylene polymer.

  Recently Added Patents
Blend polymer gas separation membrane
Channel estimating method and device
Positioning vehicles to improve quality of observations at intersections
Method and apparatus for distributing promotional materials
Editing device and editing method
System and method for enhanced artificial bandwidth expansion
Information distribution system, information distributing method, node, and recording medium
  Randomly Featured Patents
Method for manufacture of a dental product
Method for creating self-generating embroidery pattern
Diffuser assembly for an aeration system of a wastewater treatment plant
Electroconductive silicon nitride based composite sintered body and method for preparation thereof
Collapsible crate
Imaging member
Belt device and image forming apparatus having a belt correcting unit and an adjusting unit
Relative delta computations for determining the meaning of language inputs
Rigid mullite=whisker felt and method of preparation
Urine bottle with cap