摘要:
Disclosed is a liquid/gelatinous composition of matter comprising: (a) a solvent or a mixture of solvents selected from the group consisting of: (i) a CnF2n+2−xHx compound, wherein n is an integer from 6 to 15 and x is an integer from 1 to 3; and (ii) a Cn′F2n′−x′Hx′ compound, wherein n′ is an integer from 7 to 15 and x′ is an integer from 1 to 3; and (b) one or more amorphous fluoropolymers selected from the group consisting of: (i) poly(HFP/TFE); (ii) iodine ended poly(TFE/PMVE); (iii) poly(TFE/PMVE/PEVE); (iv) poly(TFE/PDD); (v) poly(TFE/perfluorovinylether); (vi) poly(CF2═CF(CF2)2OCF═CF2/TFE); and wherein the amorphous fluoropolymer has no detectable Tm (
摘要:
This invention relates to diffuse reflectors of visible light comprising a nonwoven sheet having on at least one face thereof a binder layer comprising a binder and a scatterer of visible light dispersed in the binder. These diffuse reflectors have utility in light management in optical displays such as backlit LCD displays for lap top computers and televisions.
摘要:
A composite membrane comprised of ePTFE and matrix polymer, the ePTFE being made from polytetrafluoroethylene fine powder having a standard specific gravity (SSG) of no more than about 2.16, a break strength of at least about 5.5 lb force (24.5 N), and a stress relaxation time of at least about 500 sec.
摘要:
Disclosed is a diffuse reflector comprising a consolidated nonwoven sheet having a thickness standard deviation of about 15 μm or less and a photopic reflectance of at least about 94% over the wavelength range of 380 nm to 780 nm. Further disclosed is a diffuse reflective article and optical display utilizing such a diffuse reflector, a method for producing such a diffuse reflector, and a method of improving light reflectivity utilizing such a diffuse reflector.
摘要:
A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising passing said stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion through a fixed bed of ion exchange resin beads comprising a polymer and functional groups to reduce fluorosurfactant content, the ion exchange resin beads being monodisperse.
摘要:
Disclosed is a process for forming a patterned fluoropolymer film on a substrate by raised relief printing a fluoropolymer solution with a patterned raised relief printing plate, and drying the solvent from the solution to form the patterned fluoropolymer film. Such fluoropolymer films are useful as antireflective or hydrophobic layers on substrates used in optical displays.
摘要:
A method for the production of catalyst coated membranes, especially catalyst coated membranes for use in fuel cells, includes raised relief printing a catalyst coating composition (11) onto the surface of an ion exchange membrane (16) to form at least one electrode layer.
摘要:
Disclosed is a diffuse reflector comprising a consolidated nonwoven sheet having a thickness standard deviation of about 15 μm or less and a photopic reflectance of at least about 94% over the wavelength range of 380 nm to 780 nm. Further disclosed is a diffuse reflective article and optical display utilizing such a diffuse reflector, a method for producing such a diffuse reflector, and a method of improving light reflectivity utilizing such a diffuse reflector.
摘要:
A continuous process for coating ePTFE with polymer wherein a first coating of fluoropolymer-containing liquid medium is formed on a moving elongate substrate, elongate ePTFE is contacted with the coated substrate to form an inchoate composite structure, and a final coating of fluoropolymer-containing liquid medium is formed on the inchoate composite structure.