IP Library › Granted Patent US 8,415,262
Granted Patent B2
US 8,415,262 · App. 10/971,382 · Granted Apr 9, 2013

Porous fibrous sheets of nanofibers

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Quick Facts
Patent No.
US 8,415,262
App. No.
10/971,382
Granted
Apr 9, 2013
Kind
B2
Abstract

Porous fibrous sheets are provided that are useful in end uses requiring microbial barrier properties such as medical packaging and medical gowns and drapes. The porous fibrous sheets may contain nanofibers and wood pulp.

Claims (6)

1. A porous fibrous sheet comprising at least two outer layers of wet-laid wood pulp and an inner layer of a fibrillated nanofiber/wood pulp blend sandwiched between the two outer layers, wherein the blend comprises between about 1 weight percent and 99 weight percent fibrillated nanofibers and between about 99 and 1 weight percent wood pulp, based on the total combined weight of fibrillated nanofibers and wood pulp in the blend.

2. The sheet of claim 1 , wherein the fibrillated nanofibers are lyocell.

3. A medical package comprising a lidding component heat-sealed to a second component, wherein the lidding component comprises the fibrous sheet of either of claim 1 , wherein the fibrous sheet has an LRV of at least 1.

4. The medical package of claim 3 , wherein the fibrous sheet has an LRV of at least 3.

5. The medical package of claim 3 , wherein the fibrous sheet has an LRV of at least 5.5.

6. The medical package of claim 3 , wherein the fibrous sheet has a maximum spore penetration of 0.0005%.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 25, 2019
From: E. I. DU PONT DE NEMOURS AND COMPANY
To: DUPONT SAFETY & CONSTRUCTION, INC.
Reel/Frame 049586/0001 →