Fluorocarbon Containing Patents (Class 442/82)
  • Patent number: 5885909
    Abstract: This invention relates to a new nonwoven material which has very high Frazier permeability while having substantial hydrostatic head liquid barrier properties. The material is comprised of fibers which are approximately one denier and finer fibers which have sufficient strength properties so as not to need a support scrim. The fabric is quite comfortable because of its breathability, quite soft because of its construction, and protective from liquids from rain to hazardous chemicals.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: March 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Edgar N. Rudisill, Hans Rudolf Edward Frankfort, Rudolph F. Janis, Stephen Buckner Johnson, David Jackson McGinty, H. Vaughn Samuelson, Hyunkook Shin, George Vassilatos
  • Patent number: 5874164
    Abstract: The present invention includes novel barrier webs that have certain desirable physical qualities such as water resistance, increased durability, improved barrier qualities and the like. The present invention further comprises a barrier web comprising a web that has been treated with a curable shear thinned thixotropic polymer composition, the fabric being adapted to be substantially impermeable to liquids, permeable to gases and impermeable to microorganisms. The barrier webs of the present invention are either impermeable to all microorganisms or are impermeable to microorganisms of certain sizes. The present invention also includes fabrics that are capable of either selective binding certain microorganisms, particles or molecules depending upon what binding partners are incorporated into the polymer before application to the fabric.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 23, 1999
    Assignee: Nextec Applications, Inc.
    Inventor: J. Michael Caldwell
  • Patent number: 5792404
    Abstract: The present invention pertains, in a preferred embodiment, to a method for forming a nonwoven web exhibiting a plurality of surface energy gradients.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: August 11, 1998
    Assignee: The Procter & Gamble Company
    Inventors: James W. Cree, Luis E. Ravaglia
  • Patent number: 5763040
    Abstract: A carpet underlay comprising a fibrous nonwoven substrate composed of natural or synthetic fibers having in or on it a repellent finish which makes said substrate substantially imprevious to liquids, and a carpet having an underlay substantially impervious to liquids affixed to the carpet back rendering said carpet substantially impervious to liquids are disclosed.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: June 9, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Peter Michael Murphy, Edward James Greenwood, Joyce Monson Materniak
  • Patent number: 5763332
    Abstract: Wet-like cleaning wipes and similar articles that are particularly useful in removing perianal soils. These wipes comprise a carrier comprising at least one polarphobic region, an optional, preferred substrate such as tissue paper web, and an emulsion applied to the carrier. The emulsion comprises a continuous external lipid phase and a dispersed internal polar phase. The continuous lipid phase of the emulsion is sufficiently brittle that it ruptures when subjected to low shear pressures during use to release the dispersed internal phase. Inclusion of the polarphobic region allows the ability to control flow of the internal water phase components following rupture of the emulsion.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: June 9, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Gregory Charles Gordon, Larry Neil Mackey, Paul Dennis Trokhan
  • Patent number: 5759924
    Abstract: An improved translucent architectural fabric reinforced fluoroplastic composite is described exhibiting a transmission of normally incident visible light of at least about 23%, and when subjected to 1:1 biaxial loads up to 25% of the uniaxial tensile breaking strength of the fabric, exhibits a biaxial elongation value in the warp direction that is greater than 0 but less than 1.0%, and a biaxial elongation value in the fill direction that is greater than biaxial elongation value in the warp direction but less than 10%.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: June 2, 1998
    Assignee: Chemfab Corporation
    Inventor: Katherine Mary Sahlin
  • Patent number: 5747392
    Abstract: Water repellant, stain resistant, weatherable, and transfer printable coated fabrics are provided by coating synthetic woven textile fabric with an IPN (interpenetrating polymer network)--containing aqueous coating which is composed of both acrylic and polyurethane lattices also including a crosslinker. Upon elevated temperature cure, the coating forms an interpenetrating polymer network and provides a non-leather like fabric with the hand and feel of high quality woven fabric with the ability to transmit water vapor while being virtually totally water repellant.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: May 5, 1998
    Assignee: Hi-Tex, Inc.
    Inventors: Han Xiong Xiao, Peng Geng, Kurt C. Frisch
  • Patent number: 5601910
    Abstract: A carpet underlay comprising a fibrous non-woven substrate composed of natural or synthetic fibers having in or on it a repellent finish which makes said substrate substantially impervious to liquids.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: February 11, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Peter M. Murphy, Edward J. Greenwood