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
System and method of verification of analog circuits
System and method for reducing antivirus false positives
Antibodies to CCR2
RFID device using single antenna for multiple resonant frequency ranges
Integrating multimedia capabilities with circuit-switched calls
Methods of diagnosing a plasmodium infection
Information processing apparatus capable of authentication processing with improved user convenience, control program for information processing apparatus, and recording medium having control
  Randomly Featured Patents
Thermal printer head having current sensors connected to heating elements
Combination .beta.-blocking/angiotensin II blocking antihypertensives
Perchlorate based microknit composite explosives and processes for making same
Preparation of triblock copolymers
Method and apparatus for low bit rate image compression
Circuits to delay a signal from DDR-SDRAM memory device including an automatic phase error correction
Adapter base for reed-type fuses
Disk operated plastic bag dispenser
Adjusting device for a bed or chair
Nitrogenous macrocyclic ligands, polymetallic complexes and diagnostic and therapeutic composition