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Method for manufacturing composite material filter media

A technology of filter media and composite materials, which is applied in the field of spunbond non-woven filter media and the manufacture of composite filter media, which can solve the problems of expensive turbine downtime

Active Publication Date: 2014-03-12
PARKER HANNIFIN CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Turbine downtime is expensive because the turbine is not running and therefore stops producing electricity

Method used

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  • Method for manufacturing composite material filter media
  • Method for manufacturing composite material filter media
  • Method for manufacturing composite material filter media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 is a spunbond polyester bicomponent fiber base media substrate and Example 2 is the base media substrate of Example 1 plus a 2 g / m 2 nanofiber layer. Comparative Example 3 is a known dry-laid polyester base media substrate and Comparative Example 4 is the known dry-laid polyester base media substrate of Example 3 plus 2 g / m 2 nanofiber layer. Comparative Example 5 is wet-laid synthetic paper plus 2 nanofiber layer. Comparative Example 6 is a wet-laid synthetic paper and Comparative Example 7 is the wet-laid synthetic paper of Example 6 plus 20 g / m 2 Melt blown fiber layer. Examples The results are shown in Table 1 below. In comparing the composites of Example 2 with Comparative Examples 4, 5 and 7, efficiency was not sacrificed at the expense of reduced drag, resulting in the associated high quality factor values.

[0040] Table 1

[0041] Example

[0042] Efficiency was determined at 0.3 μm, 5.3 cm / s face velocity (ASHRAE 52.2-1999).

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Abstract

A method of making a composite filter media includes, in an exemplary embodiment, forming a nonwoven fabric mat that includes a plurality of synthetic fibers by a spunbond process, and calendaring the nonwoven fabric mat with embossing calendar rolls to form a bond area pattern comprising a plurality of substantially parallel discontinuous lines of bond area to bond the synthetic fibers together to form a nonwoven fabric, the nonwoven fabric having a minimum filtration efficiency of about 50%, measured in accordance with ASHRAE 52.2-1999 test procedure. The method also includes applying a nanofiber layer by electro-blown spinning a polymer solution to form a plurality of nanofibers on at least one side of the nonwoven fabric mat to form the composite filter media, the composite filter media having a minimum filtration efficiency of about 75%, measured in accordance with ASHRAE 52.2-1999 test procedure.

Description

[0001] Related Application Cross Reference [0002] This application is a continuation-in-part of US Patent Application Serial No. 11 / 843,228, filed August 22, 2007, and claims priority to Provisional Patent Application Serial No. 60 / 893,008, filed May 5, 2007. Background of the invention [0003] The field of the invention relates generally to composite nonwoven filter media and, more particularly, to spunbond nonwoven filter media coated with a nanofiber-based layer on at least one surface. [0004] Some known filter media composite constructions combine a wet-laid papermaking process to produce the substrate and electrospinning to deposit a lightweight nanofiber coating on one or both sides of the filter media substrate. Generally, the basis weight of the dielectric substrate is 100-120g / m 2 , the basis weight of the nanofiber layer is 0.1g / m 2 or smaller. [0005] It is known that lightweight nanofibrous layers are susceptible to damage under high mechanical stress, es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/16
CPCB01D2239/025B01D69/02B01D39/163B01D39/1623B01D46/521D04H13/002B01D2325/20B01D2323/39B01D46/546D01D5/0084B01D46/0001D01D5/0985D04H13/007B01D63/065B01D63/067B01D2325/32B01D2275/10B01D71/06B01D2239/0225B01D2239/0216B01D2239/064B01D69/10B01D2239/065D04H1/4374D04H1/559D04H1/728D04H3/14D01D5/0069
Inventor A·斯米蒂斯J·T·克莱门茨D·C·琼斯H·S·林
Owner PARKER HANNIFIN CORP