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
Personal warming apparatus
Liquid crystal display device
Method and apparatus for supporting management actions for very high throughput in wireless communications
Composite high reflectivity layer
Rim for a TV receiver
Method for incubating the contents of a receptacle
  Randomly Featured Patents
Configurable width buffered module having flyby elements
Process for preparing an anisotropic aromatic pitch
On demand electronic faucet
Push button rear activating unit for a gate latch assembly
Handle with integral cord wrap
Data distribution method and apparatus, and data reception method and apparatus
System and a method for determining whether to refinance a consumer debt instrument
Phosphor with an additive for reducing afterglow
Wireless-aware network switch
Motorcycle or motorcycle replica