Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Calcium carbonate granulation
Liquid crystal display and method of driving the same
Transferring a document
Sheet member and method of manufacturing sheet member
Substrate and patterning device for use in metrology, metrology method and device manufacturing method
Method for manufacturing photoelectric conversion device
Switched capacitor hold-up scheme for constant boost output voltage
  Randomly Featured Patents
Silicon dioxide bonding layers and method
Golf putter head
Systems and methods for providing a VPN solution
Integrated PCM level control and conversion using a lookup table
Bushings
Periodic broadcast and location of evolving media content with application to seminar and stroke media
Transaction device with noise signal encryption
Structure and method for a high performance electronic packaging assembly
RF module
Method and apparatus for a data-less write operation within a cache memory hierarchy for a data processing system