Single sided hydrophilic nonwoven fabric with high tensible strength and CSR wrap made therefrom
The present application discloses a single sided hydrophilic nonwoven fabric with high tensile strength and a CSR wrap made therefrom, wherein the single sided hydrophilic nonwoven fabric has a spunbonded/meltblown/spunbonded (SMS) structure consisting of a top spunbonded layer, a middle meltblown layer and a bottom spunbonded layer, wherein one side of the nonwoven fabric is hydrophilic, and the other side of the nonwoven fabric is hydrophobic.
1 . A single sided hydrophilic nonwoven fabric, having a structure comprising (i) a top spunbonded layer including one or more spunbond layers, (ii) a middle meltblown layer including one or more meltblown layers, and (iii) a bottom spunbonded layer including one or more spunbond layers, wherein one side of the nonwoven fabric is hydrophilic and the other side thereof is hydrophobic; and
wherein the top spunbond layer and/or the bottom spunbond layer include tensile enhancer that increases the crystallization percentage of the top spunbond layer and/or the bottom spunbond layer, wherein the tensile enhancer is added in an amount of from 1 wt % to 10 wt %, based on the total weight of the top spunbonded layer and/or the bottom spunbonded layer; and
wherein the single sided hydrophilic nonwoven fabric has (a) a longitudinal tensile strength, as determined in accordance with EN ISO 1924-2, in the range of 1.2 KN/m to 5.0 KN/m; and (b) a transverse tensile strength, as determined in accordance with EN ISO 1924-2, in the range of 1.2 KN/m to 5 KN/m
wherein the single sided hydrophilic non nonwoven fabric has a basis weight from 40 to 80 gsm, and a water absorption capacity, as determined in accordance with the GB/T 1540 method, is from 10 g/m 2 to 30 g/m 2 .
2 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein the single sided hydrophilic nonwoven fabric comprises (i) 60 wt % to 95 wt % of spunbonded fibers, (ii) 5 wt % to 40 wt % of meltblown fibers, or (iii) both (i) and (ii).
3 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein the middle meltblown layer is composed of two meltblown layers.
4 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein the middle meltblown layer accounts for 10% to 30% of the weight of the whole single sided hydrophilic nonwoven fabric.
5 . The single sided hydrophilic nonwoven fabric according to claim 4 , wherein the middle meltblown layer has meltblown fibers having a diameter between 0.5 μm and 10 μm.
6 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein the top spunbonded layer is a hydrophilic spunbonded layer, and the bottom spunbonded layer is a hydrophobic spunbonded layer.
7 . The single sided hydrophilic nonwoven fabric according to claim 6 , wherein the weight of the hydrophilic spunbonded layer accounts for 30% to 50% of the weight of the whole single sided hydrophilic nonwoven fabric.
8 . The single sided hydrophilic nonwoven fabric according to claim 6 , wherein the weight of the hydrophobic spunbonded layer accounts for 30% to 50% of the weight of the whole single sided hydrophilic nonwoven fabric.
9 . The single sided hydrophilic nonwoven fabric according to claim 6 , wherein a hydrophilic masterbatch is added to the top spunbonded layer.
10 . The single sided hydrophilic nonwoven fabric according to claim 9 , wherein the hydrophilic masterbatch is a glyceride of fatty acid.
11 . The single sided hydrophilic nonwoven fabric according to claim 9 , wherein the hydrophilic masterbatch is added in an amount of from 1 wt % to 10 wt %, based on the total weight of the top spunbonded layer.
12 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein a longitudinal tensile strength of the single sided hydrophilic nonwoven fabric, as determined in accordance with EN ISO 1924-2, is in the range of 2 KN/m to 5.0 KN/m.
13 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein a longitudinal elongation of the single sided hydrophilic nonwoven fabric, as determined in accordance with EN ISO 1924-2, is in the range of 50% to 120%.
14 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein a transverse tensile strength of the single sided hydrophilic nonwoven fabric, as determined in accordance with EN ISO 1924-2, is in the range of 1.5 KN/m to 3.5 KN/m.
15 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein a transverse elongation of the single sided hydrophilic nonwoven fabric, as determined in accordance with EN ISO 1924-2, is in the range of 50% to 150%.
16 . The single sided hydrophilic nonwoven fabric according to claim 1 , wherein the single sided hydrophilic nonwoven fabric has a microbial barrier of the single sided hydrophilic nonwoven fabric, as determined in accordance with EN868, that is maintained for 180 days or longer.
17 . A central supply room (CSR) wrap made from the single sided hydrophilic nonwoven fabric according to claim 1 .
18 . A method of sterilizing a medical device, comprising: (i) enclosing the medical device within a central supply room (CSR) wrap comprising a single sided hydrophilic nonwoven fabric according to claim 1 to provide an enclosed medical device, and (ii) subjecting the enclosed medical device to a steam sterilization operation.