Back to results
US 12,428,777 B2Granted
Alcohol repellent treated nonwoven
AssigneeAVINTIV Specialty Materials Inc.
InventorsLei Wang, Nyle Bishop
Life of this patent
Estimating the term…
Abstract
Alcohol repellent fabrics having a wide variety of uses (e.g., surgical drapes, surgical gowns, etc.) are provided. The alcohol repellent fabric includes a fibrous substrate and an alcohol repellent composition (ARC). The ARC includes at least one fluorochemical and at least one binder.
Claims27
A topically-treated, alcohol repellent fabric, comprising:
- (a) a fibrous substrate consisting of a plurality of fibers including at least one layer of fine fibers having an average diameter from 1 micron to 10 microns, wherein all of the plurality of fibers comprise one or more polymers that consist of a homopolymer, a random copolymer, a block copolymer, or blends thereof;
- and
- (b) an alcohol repellent composition (ARC) comprising a mixture of:
- i. from 0.065 to 0.6 wt % of at least one fluorochemical compound on a dry basis of the ARC;
- ii. from 0.02 to 0.4 wt % of at least one binder on a dry basis of the ARC;
- iii. at least one antistatic agent comprising a phosphate ester, a neutralized alcohol phosphate, a fatty quaternary ammonium compound or salt thereof, a fatty amine, an aliphatic amine, an aliphatic amide, a polyethylene glycol ester, or combinations thereof;
- and
- iv. from 0.2 to 0.6 wt % of at least one surfactant on a dry basis of the ARC;
- wherein a first weight ratio of the at least one fluorochemical compound to the at least one binder, as measured on a dry basis, is from 0.7:1 to 2:1 and the alcohol repellent fabric has a hydro head from about 80 mbar to about 100 mbar as measured by standard test method EN 20811 and ramping up the pressure at a rate of 60 mbar/min.
6 more elements
A process for forming a topically-treated, alcohol repellent fabric, comprising:
- (a) providing a fibrous substrate consisting of a plurality of fibers including at least one layer of fine fibers having an average diameter from 1 micron to 10 microns, wherein all of the plurality of fibers comprise one or more polymers that consist of a homopolymer, a random copolymer, a block copolymer, or blends thereof and
- (b) topically applying an alcohol repellent composition (ARC) to at least a first portion of a first outer surface and to at least a second portion of a second outer surface of the fibrous substrate to form the alcohol repellent fabric, wherein the ARC comprises a mixture of from 0.065 to 0.6 wt % of at least one
- fluorochemical compound on a dry basis of the ARC, from 0.02 to 0.4 wt % of at least one binder on a dry basis of the ARC, at least one antistatic agent;
- and from 0.2 to 0.6 wt % of at least one surfactant on a dry basis of the ARC;
- wherein a first weight ratio of the at least one fluorochemical compound to the at least one binder, as measured on a dry basis, is from 0.7:1 to 2:1, and the alcohol repellent fabric has a hydro head from about 80 mbar to about 100 mbar as measured by standard test method EN 20811 and ramping up the pressure at a rate of 60 mbar/min;
- and
- wherein the at least one antistatic agent comprises a phosphate ester, a neutralized alcohol phosphate, a fatty quaternary ammonium compound or salt thereof, a fatty amine, an aliphatic amine, an aliphatic amide, a polyethylene glycol ester, or combinations thereof.
4 more elements
A topically-treated, alcohol repellent fabric, comprising:
- (a) a fibrous substrate consisting of:
- (i) a first outer spunbond layer consisting of a plurality of first continuous fibers formed from one or more polymers consisting of a homopolymer, a random copolymer, a block copolymer, or blends thereof;
- (ii) a second outer spunbond layer consisting of a plurality of second continuous fibers formed from one or more polymers consisting of a homopolymer, a random copolymer, a block copolymer, or blends thereof;
- and
- (iii) at least two adjacent meltblown layer located between the first outer spunbond layer and the second outer spunbond layer, that at least two adjacent meltblown layers consist of a plurality of fine fibers formed from one or more polymers consisting of a homopolymer, a random copolymer, a block copolymer, or blends thereof, and wherein the at least two adjacent meltblown layers have an average diameter from 1 to 10 microns;
- (b) an alcohol repellent composition (ARC) comprising a mixture of:
- i. from 0.065 to 0.6 wt % of at least one fluorochemical compound on a dry basis of the ARC;
- and
- ii. from 0.02 to 0.2 wt % of at least one binder on a dry basis of the ARC;
- iii. at least one antistatic agent comprising a phosphate ester, a neutralized alcohol phosphate, a fatty quaternary ammonium compound or salt thereof, a fatty amine, an aliphatic amine, an aliphatic amide, a polyethylene glycol ester, or combinations thereof;
- and
- iv. from 0.2 to 0.6 wt % of at least one surfactant on a dry basis of the ARC;
- wherein a first weight ratio of the at least one fluorochemical compound to the at least one binder, as measured on a dry basis, is from 0.7:1 to 2:1.
10 more elements
Dependencies are inferred from the claim text.