Patents Assigned to Hybritech Polymers
  • Multi-layer assembly for fluid and vapor handling and containment systems
    Patent number: 6263920
    Abstract: A multi-layer assembly for fluid and vapor handling and containment systems. The multi-layer tubing assembly comprises a permeation resistance layer of polymeric material and a layer of multiphase polymer surrounding the permeation resistance layer.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: July 24, 2001
    Assignee: Hybritech Polymers
    Inventors: Henry S. Hsich, Dean T. Su
  • Multi-layer assembly for fluid and vapor handling and containment systems
    Patent number: 6209587
    Abstract: A multi-layer assembly for fluid and vapor handling and containment systems. The multi-layer assembly comprises an extrudable inner layer of a polymeric material, a first layer of multiphase polymer surrounding the inner layer, a permeation resistance layer of polymeric material surrounding the first layer of multiphase polymer and a second layer of multiphase polymer surrounding the permeation resistance layer.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: April 3, 2001
    Assignee: Hybritech Polymers
    Inventors: Henry S. Hsich, Dean T. Su
  • Multi-layer tubing assembly for fluid and vapor handling systems
    Patent number: 6192942
    Abstract: This invention relates to a multi-layer tubing assembly for use in fuel-line application. The multi-layer tubing assembly comprises an extruded inner layer of thermoplastic, an adhesive layer coextruded around the inner layer and a cover layer of a multiphase polymer coextruded around the adhesive layer. The multiphase polymer forming the cover layer comprises 0.5% to 20% by weight compatibilizers and rheology modifiers.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: February 27, 2001
    Assignee: Hybritech Polymers
    Inventors: Henry S. Hsich, Dean T. Su
  • Multi-layer assembly for fluid and vapor handling and containment systems
    Patent number: 6176268
    Abstract: A multi-layer assembly for fluid and vapor handling and containment systems. The multi-layer tubing assembly comprises an extrudable layer of conductive fluoropolymer, a layer of modified fluoropolymer containing a reactive group extruded around the layer of conductive fluoropolymer and a layer of polar polymer extruded around the layer of modified fluoropolymer. The layer of modified fluoropolymer is bonded to the layer of polar polymer.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: January 23, 2001
    Assignee: Hybritech Polymers
    Inventors: Henry S. Hsich, Dean T. Su
  • Multi-layer tubing assembly for fluid and vapor handling systems
    Patent number: 6012496
    Abstract: A multi-layer tubing for use in fluid transport applications. The tubing is suitable for conveying fluids containing hydrocarbons. The tubing comprising an extrudable adhesive layer coextruded around a permeation-resistant layer of fluoropolymer and a layer of polymer chemically dissimilar from fluoropolymer coextruded around the adhesive . The adhesive layer is formed of a polymer blend or alloy having a multi-phase morphology wherein one phase is miscible with the fluoropolymer for forming the inner permeation-resistant layer and another phase is miscible with the polymer chemically dissimilar from fluoropolymer.To achieve sufficient bonding, the adhesive layer comprises at least 25% volume fraction of the first phase which is miscible with the fluoropolymer for forming inner permeation-resistant layer and at least 25% volume fraction of the second phase which is miscible with the polymer chemically dissimilar from fluoropolymer.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: January 11, 2000
    Assignee: Hybritech Polymers
    Inventors: Henry S. Hsich, Dean T. Su