IP Library › Granted Patent US 6,942,711
Granted Patent B2
US 6,942,711 · App. 10/690,030 · Granted Sep 13, 2005

Hydroentangled filter media with improved static decay and method

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Quick Facts
Patent No.
US 6,942,711
App. No.
10/690,030
Granted
Sep 13, 2005
Kind
B2
Abstract

The present invention is directed to a filter media comprised of an electro-conductive scrim so as to improve on the dissipation time of an electrostatic charge. Further, the present invention is directed to a method of making such a filter media, which is formed through hydroentanglement, thus avoiding the deleterious effects of mechanical needling, while providing a filter media having the requisite strength characteristics, without possessing a limiting factor in performance. The filtration media of the present invention also demonstrates a highly desirable uniformity for cost-effective use.

Claims (5)

1. A laminate filter media structure comprising hydroentangled, predominant staple length fibers and an electro-conductive scrim in the form of a spunbond material to provide a reduced static decay time, said filter media structure having a basis weight of no more than about 6 oz/yd 2 , a Mullen burst strength of at least about 198 psi, and machine-direction and cross-direction shrinkage of less than about 3% wherein said filter media exhibits a machine-direction tensile strength of at least about 52 lb/in and a cross-direction tensile strength of at least about 55 lb/in.

2. A filter media structure in accordance with claim 1 , wherein said media exhibits machine-direction and cross-direction shrinkage of less than about 2%.

3. A filter media structure in accordance with claim 1 , wherein said filter media is a gas filter.

4. A filter media structure in accordance with claim 1 , wherein said filter media is an air filter.

5. A filter media structure in accordance with claim 1 , wherein said filter media is a liquid filter.

Assignments (6)
SECOND LIEN SECURITY AGREEMENT Recorded Oct 7, 2015
From: AVINTIV INC. (INDIVIDUALLY AND AS SUCCESSOR BY MERGER TO BERRY PLASTICS ACQUISITION CORPORATION IX); PGI POLYMER, INC.; CHICOPEE, INC.
To: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 036799/0627 →
FIRST LIEN SECURITY AGREEMENT Recorded Oct 6, 2015
From: AVINTIV INC. (INDIVIDUALLY AND AS SUCCESSOR BY MERGER TO BERRY PLASTICS ACQUISITION CORPORATION IX); AVINTIV SPECIALTY MATERIALS, INC.; PGI POLYMER, INC.; CHICOPEE, INC.
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS TERM COLLATERAL AGENT; BANK OF AMERICA, N.A., AS ABL COLLATERAL AGENT
Reel/Frame 036788/0041 →
RELEASE OF SECURITY INTEREST Recorded Oct 2, 2015
From: WILMINGTON TRUST COMPANY
To: AVINTIV SPECIALTY MATERIALS, INC. (F/K/A POLYMER GROUP, INC.)
Reel/Frame 036743/0667 →
RELEASE OF SECURITY INTEREST Recorded Oct 2, 2015
From: CITIBANK, N.A.
To: AVINTIV SPECIALTY MATERIALS, INC. (F/K/A POLYMER GROUP, INC.)
Reel/Frame 036743/0900 →
CHANGE OF NAME Recorded Jul 20, 2015
From: POLYMER GROUP, INC.
To: AVINTIV SPECIALTY MATERIALS INC.
Reel/Frame 036132/0354 →
SECURITY AGREEMENT Recorded Mar 9, 2011
From: POLYMER GROUP, INC.
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 025920/0089 →