Abstract: A compound comprising wherein R2 is an alkyl group which may be straight chain or branched and n is a number of from 2 to 40.

Abstract: An electret filter media, and mask, that is made of a nonwoven web of thermoplastic microfibers. The thermoplastic microfibers are of substantially the same composition, are nonconductive, and have an effective fiber diameter less than about 15 micrometers. The nonwoven web also has sufficient unpolarized trapped charge to exhibit an initial filtration quality factor of at least 0.31 when measured under the DOP Penetration and Pressure Drop Test.

Abstract: Electret filter media comprising a fibrous web of a blend of a thermoplastic resin and at least one compound or oligomer that enhances the web's electret properties.

Abstract: Fibrous webs comprising a blend of a thermoplastic resin and at least one compound or oligomer which is ##STR1## wherein R.sub.f is a perfluorinated moiety which may contain one or more catenary ether oxygen atoms, Q is a linking group selected from alkylene groups having 1 or 2 carbon atoms, sulfonamido groups or combinations thereof, R is an alkyl group, R.sup.1 is a perfluoroalkyl group, R.sup.2 is an alkyl group which may be straight chain or branched and n is a number of from 2 to 40.

Abstract: A composition comprising a blend of a thermoplastic resin and at least one compound or oligomer which is ##STR1## wherein R.sub.f is a perfluorinated moiety which may contain one or more catenary ether oxygen atoms, Q is a linking group selected from alkylene groups having 1 or 2 carbon atoms, sulfonamido groups or combinations thereof, R is an alkyl group, R.sup.1 is a perfluoroalkyl group, R.sup.2 is an alkyl group which may be straight chain or branched and n is a number of from 2 to 40.

Abstract: The present invention relates to a method of making a fibrous electret material which includes the steps of (1) forming a fibrous web of nonconductive thermoplastic fibers from a blend of nonconductive thermoplastic resin and an additive which is (a) a thermally stable organic compound or oligomer containing at least one perfluorinated moiety or (b) a thermally stable organic triazine compound or oligomer containing at least one nitrogen atom in addition to those in the triazine group or (c) a combination thereof; (2) impinging jets of water or a stream of water droplets onto the web at a pressure sufficient to provide the web with filtration enhancing electret charge; and (3) drying the web.

Abstract: The present invention includes a method of creating a shaped image in a workpiece using a flashlamp, the method comprising positioning a template proximate the workpiece and directing radiation emitted by the flashlamp during a short pulse of less than approximately 100 .mu.sec through the template toward the workpiece.

Abstract: A composition comprising: (1) a susceptor of magnetically coupled radio frequency energy comprising a non-magnetic particulate substrate, e.g., an electrically insulative material in particulate form, bearing a thin magnetic coating, e.g., a magnetic inorganic film, and (2) a matrix that is substantially non-reflective of radio frequency energy, e.g., silicone rubber, which matrix can be heated upon the composition's being subjected to magnetically coupled radio frequency energy. It has been discovered that thin magnetic coatings on non-magnetic particles provide energy transfer with induction heaters equal to or better than many commonly used solid susceptor particles. It has also been discovered that the temperature of the composition of this invention can be regulated so as not to exceed a predetermined temperature.

Abstract: A method of making a microfibrous sorbent article is provided. The method includes the steps of a) extruding molten thermoplastic fiber forming polymer from multiple orifices in a fiber-forming die, said orifices being aligned along the face of the die; b) attenuating the fibers in a stream of hot air to form a fiber stream of microfibers; and c) collecting said microfibers on a collector having a forming surface, said surface being aligned with said die and substantially parallel to and equidistant from said die such that the fibers form a spirally wound microfibrous sorbent article which is supported on its exterior surface by said forming surface and which is drawn across said forming surface substantially parallel to said die. Also provided is a microfibrous sorbent article prepared according to the method.

Abstract: A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive microfibers capable of having a high quantity of trapped charge jets of water or a stream of water droplets at a pressure sufficient to provide the web with filtration enhancing electret charge and drying said web.

Abstract: An insert-molded head harness for use in securing a respirator mask to the face of a wearer, wherein the head harness comprises a web having a central portion and a peripheral portion extending at least partially around the central portion, and a plurality of elastomeric fastening straps having first and second ends, the first ends being integrally bonded to the peripheral portion of the web and the second ends being adapted to be used in securing a respirator mask to the face of a wearer. The head harness can include an elastomeric flange which comprises an elastomeric resin and embeds the peripheral portion of the web. The web preferably comprises a material selected from the group consisting of woven, knitted, and non-woven materials.

Abstract: An oily mist resistant electret filter media is provided. The filter media includes polypropylene electret fibers and a melt processable fluorochemical additive, the additive having a melting point of at least 25.degree. C. and a molecular weight of about 500 to 2500.

Abstract: A microfibrous sorbent article is provided. The microfibrous sorbent article comprises an elongate boom having a substantially oval cross-section. The boom is formed of multiple adjacent microfibers layers, the layers being bonded to each other by entanglement of fibers between adjacent layers. The boom further contains ion exchange resin, selectively absorbent particulate material, catalytic agent or selectively reactive particulate material.

Abstract: A process and apparatus for the plasma deposition of a carbon-rich coating onto a substrate is provided. This method includes the steps of: providing a substrate in a vacuum chamber; and generating a carbon-rich plasma in the vacuum chamber by injecting a plasma gas into a hollow cathode slot system containing a cathode made of two electrode plates arranged parallel to each other, providing a sufficient voltage to create and maintain a carbon-rich plasma in the hollow cathode slot system, and maintaining a vacuum in the vacuum chamber sufficient for maintaining the plasma. The plasma is deposited on the substrate to form a carbon-rich coating.

Abstract: Composition comprising (a) susceptors having the capability of absorbing microwave energy, said susceptors comprising a particulate substrate substantially non-reflective of microwave energy and a coating capable of absorbing microwave energy, and (b) a matrix substantially non-reflective of microwave energy. Susceptors are typically particles having a thin-film coating thereon. The matrix typically comprises polymeric or ceramic materials that are stable at temperatures conventionally used in microwave cooking. The composition allows reuse of the susceptors, eliminates decline in heating rate, eliminates arcing, allows the heating rate to be controlled, allows overheating to be controlled, and allows formation of microwave heatable composite materials having very low metal content.

Abstract: A multilayer nonwoven thermal insulating batt is provided. The batt comprises a blend of bonding staple fibers and staple fill fibers, the fibers being formed into a multilayer batt. The bonding fibers are subsequently bonded sparingly to staple fill fibers at the points of contact to enhance the structural stability of the multilayer batt but allow delamination of the individual web layers under mechanical action.

Abstract: Fluorine-containing liquid crystal compounds are provided. The compounds comprise a fluorocarbon terminal portion having at least one catenary ether oxygen and a hydrocarbon terminal portion, the terminal portion being connected by a central core, the compounds having smectic mesophases or having latent smectic mesophases.

Abstract: A multilayer nonwoven thermal insulating batt is provided. The batt comprises multiple layers of webs, each web being a blend of 5 to 100 weight percent bonding staple fibers and 0 to 95 weight percent staple fill fibers, the bonding fibers bonded to other bonding fibers and fill fibers at the points of contact to enhance the structural stability of the layers of the batt. Also provided is a method of making the thermal insulating nonwoven multilayer batt comprising the steps of: (a) forming a web of bonding staple fibers and staple fill fibers; (b) subjecting the web to sufficient heat to cause bonding of the bonding staple fibers to other bonding staple fibers and staple fill fibers at points of contact within the web to stabilize the web; and (c) forming a batt of multiple layers of said webs.

Abstract: A filter element adapted for attachment to a respirator face piece which includes front and rear walls of filter material, a breather tube, and a porous inner layer which maintains the front and rear walls in a spaced-apart relationship over substantially their entire area and which functions to evenly distribute air flow across the available filter element surface area.

Abstract: A method for attenuating sound waves passing from a source area to a receiving area comprises the steps of providing a nonwoven acoustical insulation web comprising thermoplastic fibers, the web having an average effective fiber diameter of less than about 15 microns, a density of less than about 50 kg/m.sup.3, and an air pressure drop across the web of at least about 1 Mm water at a flow rate of about 32 liters/min.; and positioning the web between the source area and the receiving area such that a major face of the web intercepts and thereby attenuates sound waves passing from the source area to the receiving area. Also, a laminate adapted to be applied to the inner panel of a vehicle door comprises the web and a second layer, such as a scrim, nonwoven fabric, film, or foil, laminated thereto. The laminate can be applied to the inner panel of a vehicle door so that the second layer provides water barrier protection and the web provides acoustical insulation.