摘要:
This invention provides a process for making a nonwoven sheet of substantially continuous melt spun fibers by extruding melt spinnable polymer containing at least 30% by weight low IV poly(ethylene terephthalate), drawing the extruded fiber filaments at a rate of at least 6000 m/min, laying the fiber filaments down on a collection surface, and bonding the fiber filaments together to form a nonwoven sheet. The invention further provides a nonwoven sheet comprised of at least 30% by weight poly(ethylene terephthalate) having an intrinsic viscosity of less than 0.62 dl/g, where the sheet has a basis weight of less than 125 g/m2, and a grab tensile strength of at least 0.7 N/(g/m2).
摘要:
A self-supporting filter media as well filter element and filtration system including the same is provided. A method of manufacturing the self-supporting filter media is also provided. The self-supporting filter media is formed such that it has a rigidity which permits the omission of filter support cage or other internal media support structure.
摘要:
In embodiments, the present invention provides a plurality of fine fiber strands made from a first polymer and a second polymer where the second polymer has a higher molecular weight than the first polymer. In preferred embodiments, the fine fiber strands have an average diameter of less than 2 micron, and the fine fiber strands have a length of at least 1 millimeter.
摘要:
A filter media is provided. The filter media has a blend of filter media fibers, including oxidized polyacrylonitrile (OPAN) fibers and fibers of at least one other polymer, such that the OPAN fibers comprise between 30% and 95% by weight of the blend. A filter element incorporating the filter media is also provided. A method of using the filter element is provided as well. Also provided is a method of manufacturing the filter media. The filter media has applicability for filtering air in such acidic environments as a cement factory, lime kiln, asphalt process, rock dust application, and coal fired boilers.
摘要:
Disclosed in this specification is a method for making a pleated filter cartridge by placing a pleated filter on a mold and adding a polymerizable potting compound to the inner cavity of the pleated filter. The potting compound is permitted to cover the portion of the upper surface of the mold that is encompassed by the pleats. The potting compound is selected to form a polyurethane after polymerization is complete.
摘要:
An evaporative cooler, and associated method, that includes an evaporative pad including a liquid coolant-receiving surface at which a liquid coolant distributed to the evaporative pad is received and thereafter passes into the evaporative pad. The evaporative cooler also includes a liquid coolant distribution trough that includes an upper portion configured to hold liquid coolant and a lower portion contiguous with the upper portion. The lower portion includes an opening and a fabric distribution layer in place over the opening through which the liquid coolant held in the upper portion of the liquid coolant distribution trough passes and is distributed to the liquid coolant-receiving surface of the evaporative pad.
摘要:
Disclosed in this specification is a method for making a pleated filter cartridge by placing a pleated filter on a mold and adding a polymerizable potting compound to the inner cavity of the pleated filter. The potting compound is permitted to cover the portion of the upper surface of the mold that is encompassed by the pleats. The potting compound is selected to form a polyurethane after polymerization is complete.
摘要:
An article comprises a first layer which includes a substrate and a nucleophilic organic polymer cross-linked on a surface of or within the substrate. The cross-linked nucleophilic polymer comprises functional groups operative to form a covalent bond with a chemical or biological agent. The first layer also includes reactive particles located on a surface of or within the substrate.
摘要:
A method of manufacturing a composite article such as an airplane part or a boat part is presented. The method includes: preparing a prepreg layup, the prepreg layup comprising a plurality of prepregs and at least one microporous breather membrane; enclosing the prepreg layup with a gas impermeable vacuum bag; evacuating a volume enclosed by the gas impermeable vacuum bag to preconsolidate the plurality of prepregs; consolidating the plurality of prepregs; and discontinuing the evacuating.