Filter media
First Claim
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1. A filter media comprising:
- at least one coarse spunbond polymer fiber support layer; and
a meltblown polyolefin microfiber polymer web mated to the coarse spunbond polymer fiber support layer, the meltblown polyolefin microfiber polymer web being formed of fine fibers having a diameter less than about 1.5 microns;
wherein the filter media is effective for use in heating, refrigeration, ventilation, and exhaust duct filtering applications, and has a base alpha value of at least about 11 throughout the useful life of the filter media, even after decay of any charge that may be present.
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Abstract
A filter media having a synthetic microfiber polymer fine fiber web wherein the diameter of the fibers is between about 0.8 to about 1.5 microns. The filter media is acceptable for use in ASHRAE applications. Constructions with a low DP backing, support or prefilter layers of coarse fiber provide large area filter webs of high efficiency and a stale and high threshold value of alpha above eleven.
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Citations
14 Claims
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1. A filter media comprising:
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at least one coarse spunbond polymer fiber support layer; and
a meltblown polyolefin microfiber polymer web mated to the coarse spunbond polymer fiber support layer, the meltblown polyolefin microfiber polymer web being formed of fine fibers having a diameter less than about 1.5 microns;
wherein the filter media is effective for use in heating, refrigeration, ventilation, and exhaust duct filtering applications, and has a base alpha value of at least about 11 throughout the useful life of the filter media, even after decay of any charge that may be present. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification