ASTM D461 PDF

ASTM D461 PDF

Buy ASTM D TEST METHODS FOR FELT from SAI Global. UNITS. METHOD. FREQUENCY. Thickness- Mean. (man. – 10oz). (¼”). mm. ASTM-D/. MOD. 1 / skid. Width. cm. ASTM-D/. ASTM-D Standard Test Methods for Felt (Withdrawn ) – Acid content; felt roll/sheet-acid content, test,; Ash; felt roll/sheet-ash content, test,; Breaking.

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This invention is directed to a filter media with improved heat resistance and performance properties, specifically, a filter media with improved cycle times, particulate removal efficiency, heat resistance and aztm resistance.

In several asstm, baghouses having bag filters are used to remove dust and other particulates from the an air stream. Some of the industries that use bag houses to remove particulates from the air stream include garbage incinerators, coal plants or boilers, furnaces for melting metal and other materials, pharmaceutical production food manufacturing, chemical production and cement plants.

r461 Most baghouses use long, cylindrical filter bags or tubes made of fabric as the filter medium. Gas having particles enters the baghouse through hopper 10 of FIG.

The gas is then directed through the filter bags 12 in a manifold where the filtered air exits the baghouse. Particulate in the gas stream are deposited on the filter bag.

FIELD OF THE INVENTION

Periodically, compressed air or other means is used to reverse the flow of gas through sstm bag filter which results in the filter cake or particulates being forced off the filter bags. The particulate then drops to the bottom of the hopper and can be removed from the hopper.

The particulates collect on the bag due to at least one of the following forces: Therefore the filter bags need to be able to function in these operational temperatures. One significant risk associated with some applications is the risk of embers, heated particles or sparks being present in the hopper. In the event that an ember or other hot particle contacts the filter media, a hole can be burned in the filter media severely hampering or completely eliminating its effectiveness.

Filter Media – Southern Felt Company, Inc.

A spark can also aztm an undesirably opening in the filter bag. In some applications, the gas includes particles that are heated such as in the coal, chemical, metal industries. These heated particles can contact the filter bag and damage the bag rendered the filtering functionality ineffective. Further, there can be chemicals in the air stream that are corrosive or otherwise damaging to the filter bag itself.

Therefore, it would be advantageous to have a filter bag for a baghouse that was resistant to heated particles and corrosive chemicals while maintaining or improving the performance properties of traditional filter bags. To further the objectives above, this invention provides for non woven filter media comprising: The invention can also include filter media comprising: The invention can also include a nonwoven filter media comprising: The following description is better c461 with reference to the incorporated drawings which are part of the description of the invention:.

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This invention relates to a composition of fibers and filter media made there from that provide for advantageous physical properties, especially for use with bag filters for a baghouse. The denier of these fibers can be between 0. Ast denier of the inorganic fiber can be between 0. The first polymer can e461 a denier of between 0. The first polymer can have a denier between 0. A scrim can be included in the filter media to support the blended fibers. When the polyphenylene sulfide fibers and the inorganic fibers are blended asstm used to manufacture a filter media for a bag filter, the resulting filter can have the physical property of clean gas concentration of less than 0.

Tank Pressure 5 Bar 4. With the above test parameter and tested filter media, the following d4461 were achieved as shown in Tables 1 and From these results, we can see that the clean gas concentration can be less than 0.

In one embodiment, the filter media manufactured from the blended fibers has the physical property of total mass removal of about In one embodiment, the nonwoven filter media can be supported by a scrim that astj be 1. The weight of the filter media can be between 5. The filter media can have a thickness between 0.

In one embodiment, an acid resistance tensile test is preformed with a testing machine suitable for ASTM D A sample of the blended fabric is cut into about a 2 inch by 6 inch piece in the machine direction.

The process of placing the sample in the 1N H 2 SO 4 solution then drying and cooling the sample defines one cycle. The samples are then tested using test method ASTM for strength and elongation with a lbs load. Using the acid resistance tensile test, the results are shown in FIGS.

From the acid resistance tensile test, it can be seen that after the first two cycles, the sample can withstand over Ids of force.

At break, after the third and fourth cycle, the sample can withstand 80 Ids of force. After the fifth and sixth cycles, the sample can withstand about 70 pounds of force. In terms of percentage strength loss, the sample exhibits virtually no loss after the first two cycles.

The following table illustrates the physical property benefit of the present invention when compared to a polyphenylene sulfide PPS fiber alone. In one embodiment, the polyphenylene sulfide fibers have a length of between 1 and 4 inches and a aastm of between 7 and 36 microns and said inorganic fibers have a length of between 1 and 4 inches and a diameter of between 5 and 20 microns.

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The fibers 14 with the larger diameter principally consist of polyphenylene sulfide and the fibers 16 with the smaller diameters are the inorganic fibers. The scrim 18 is also shown disposed in the blend of fibers.

The inorganic fibers are blended with the polyphenylene sulfide fibers and supported by a scrim. A SumoBrain Solutions Company. Search Expert Search Quick Search. A nonwoven filter media comprising: Click for aztm bibliography generation.

Southern Felt Company, Inc. DavisTextile Research Journal, What is claimed is: A non woven filter media comprising: The nonwoven filter media of claim 1 including a scrim supporting said filter media.

The nonwoven filter media of claim 2 wherein said scrim is a 1 to 6 ounce scrim. The nonwoven filter media of claim 1 wherein said filter media has a weight of between 5. The nonwoven filter media of claim 1 wherein said polyphenylene sulfide fibers have a length of between 1 and 4 inches and a diameter of between 7 and 36 microns and said inorganic fibers have a length of between 1 and 4 inches and a diameter of between 5 and 30 microns.

The nonwoven filter media of claim 1 wherein said filter media exhibits a total mass removal efficiency of about The nonwoven filter media of claim 1 wherein said filter media exhibits a residual pressure drop of less than Pa as measured by ASTM-D A filter media comprising: The filter media of claim 11 including a scrim supporting said first polymer fiber and said inorganic fibers.

The filter media of claim 11 wherein said filter media includes physical properties taken from the group consisting of: The filter media of claim 11 wherein said tensile test is preformed according to tensile test ASTM-D The nonwoven filter media of claim 16 including a scrim supporting said first fibers and said inorganic fibers.

The nonwoven filter media of claim 16 including a first layer and a second layer of nonwoven filter media supported by a scrim. The nonwoven filter media of claim 16 that is laminated with a PTFE membrane.

The nonwoven filter media of claim 16 that is chemically treated. The nonwoven filter r461 of claim 16 that has two or more fibers blended with the inorganic fiber. With the above test parameter and tested filter media, the following results were achieved as shown in Tables 1 and 2: Air cleaner, filter element, and methods.

Reticulated pore formers for ceramic articles. Device used to purify air and keep cleanly the duct of hot air system or central air exchanger.