Cellulose-Based medical packaging material sterilizable by oxidizing gas plasma
First Claim
1. A medical packaging material comprising:
- a cellulosic nonwoven web comprised of fibers, in whichfrom about 50 to 100 percent by weight of the fibers, based on the total weight of the fibers, are cellulosic fibers;
from 0 to about 50 percent by weight of the fibers, based on the total weight of the fibers, are synthetic polymer fibers; and
a saturant which is present in the nonwoven web at a level of from about 50 to about 150 percent by weight, based on the dry weight of the fibers, the saturant comprising a cellulosic fiber-protecting synthetic polymer, said cellulosic fiber-protecting synthetic polymer having an effectively low permeability to hydrogen peroxide, andwherein the cellulosic fiber-protecting synthetic polymer has a water vapor transmission rate for a 2.5 micrometer film no greater than about 10 grams per 1000 square inches per 24 hours at 38°
C. and 90 percent relative humidity.
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Accused Products
Abstract
A medical packaging material based on a cellulosic nonwoven web which may be used in an oxidizing gas plasma sterilization environment. The material includes a cellulosic nonwoven web made up of fibers. From about 50 to 100 percent by weight of the fibers, based on the total weight of the fibers, are cellulosic fibers, and from 0 to about 50 percent by weight of the fibers, based on the total weight of the fibers, are noncellulosic fibers, such as glass wool and synthetic polymer fibers. In some embodiments, the cellulosic nonwoven web may be composed of 100 percent by weight of cellulosic fibers. The cellulosic nonwoven web includes a saturant which is present at a level of from about 50 to about 150 percent by weight, based on the dry weight of the fibers. The saturant includes a cellulosic fiber-protecting synthetic polymer having an effectively low permeability to hydrogen peroxide. For example, the cellulosic fiber-protecting synthetic polymer may have a water vapor transmission rate for a 2.5 micrometer film no greater than about 10 grams per 100 square inches per 24 hours at 38° C. and 90 percent relative humidity. As another example, the cellulosic fiber-protecting synthetic polymer may have a water vapor transmission rate for a 2.5 micrometer film no greater than about 6 grams per 100 square inches per 24 hours at 38° C. and 90 percent relative humidity.
117 Citations
20 Claims
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1. A medical packaging material comprising:
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a cellulosic nonwoven web comprised of fibers, in which from about 50 to 100 percent by weight of the fibers, based on the total weight of the fibers, are cellulosic fibers; from 0 to about 50 percent by weight of the fibers, based on the total weight of the fibers, are synthetic polymer fibers; and a saturant which is present in the nonwoven web at a level of from about 50 to about 150 percent by weight, based on the dry weight of the fibers, the saturant comprising a cellulosic fiber-protecting synthetic polymer, said cellulosic fiber-protecting synthetic polymer having an effectively low permeability to hydrogen peroxide, and wherein the cellulosic fiber-protecting synthetic polymer has a water vapor transmission rate for a 2.5 micrometer film no greater than about 10 grams per 1000 square inches per 24 hours at 38°
C. and 90 percent relative humidity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical packaging material comprising:
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a cellulosic nonwoven web comprised of fibers, in which from about 50 to 100 percent by weight of the fibers, based on the total weight of the fibers, are cellulose fibers; from 0 to about 50 percent by weight of the fibers, based on the total weight of the fibers, are synthetic polymer fibers; and a saturant which is present in the nonwoven web at a level of from about 50 to about 150 percent by weight, based on the dry weight of the fibers, the saturant comprising a cellulosic fiber-protecting synthetic polymer, said cellulosic fiber-protecting synthetic polymer having an effectively low permeability to hydrogen peroxide, and wherein the medical packaging material has a Gurley porosity of from about 0.5 to about 350 seconds per 100 cc of air. - View Dependent Claims (20)
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12. A medical packaging material comprising:
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a cellulosic nonwoven web comprised of fibers, in which from about 50 to 100 percent by weight of the fibers, based on the total weight of the fibers, are cellulosic fibers; from 0 to about 50 percent by weight of the fibers, based on the total weight of the fibers, are synthetic polymer fibers; a saturant which is present in the nonwoven web at a level of from about 50 to about 150 percent by weight, based on the dry weight of the fibers, the saturant comprising a cellulosic fiber-protecting synthetic polymer, said cellulosic fiber-protecting synthetic polymer having an effectively low permeability to hydrogen peroxide; and a coating on a surface of the cellulosic nonwoven web, and wherein the cellulosic fiber-protecting synthetic polymer has a water vapor transmission rate for a 2.5 micrometer film no greater than about 10 grams per 100 square inches per 24 hours at 38°
C. and 90 percent relative humidity. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification