Dry wipe with demisting and/or cleaning action

Patent metadata

Field	Value
Publication number	US-10448793-B2
Application number	US-201414761864-A
Country	US
Kind code	B2
Filing date	Jan 17, 2014
Priority date	Jan 18, 2013
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

The present invention relates to a dry wipe comprising a woven or knitted microfiber fabric having hydrophilic polymer microfibers and lipophilic polymer microfibers, which is impregnated with at least one surfactant, the hydrophilic/lipophilic balance (HLB) of which is greater than or equal to 5. These wipes can be used to clean the surface of substrates and/or to confer demisting properties on hydrophilic surfaces.

First claim

The invention claimed is:

1. A dry wipe comprising a woven or knitted microfiber fabric impregnated with at least one surfactant, wherein:
the surfactant is a polyethoxylated surfactant of fluoroalkyl nature and has a hydrophilic-lipophilic balance (HLB)≥5; and
the microfiber fabric comprises hydrophilic polymer microfibers and lipophilic polymer microfibers;

the wipe not comprising a dry microfiber fabric obtained by i) impregnation of a microfiber fabric comprising microfibers made of polymers or of mixtures of polymers comprising polyester units and polyamide units, with a surfactant composition containing at least one surfactant of formula F(CF 2 ) y —(CH 2 —CH 2 O) x+1 H (VIII), in which x is an integer varying from 1 to 14 or x is an integer varying from 2 to 14, y is an integer less than or equal to 10, the compounds of formula (VIII) for which y=6 representing at least 90% by weight of the compounds of formula (VIII) present in the composition, then ii) drying of this microfiber fabric.

2. The wipe as claimed in claim 1 , wherein the surfactant contains at least one Si—O siloxane unit and has a surface tension of less than 40 nN/m.

3. The wipe as claimed in claim 1 , wherein the surfactant has a hydrophilic-lipophilic balance (HLB)≤18.

4. The wipe as claimed in claim 1 , wherein the woven or knitted microfiber fabric comprises polyamide microfibers and polyester microfibers.

5. The wipe as claimed in claim 1 , wherein the surfactant comprises a polyoxyalkylene group.

6. The wipe as claimed in claim 5 , wherein the surfactant comprises a polyoxyethylene group.

7. The wipe as claimed in claim 6 , wherein the polyoxyethylene group comprises more than 6 oxyethylene units.

8. The wipe as claimed in claim 1 , wherein the wipe comprises from 5% to 40% by weight of impregnated surfactants relative to the weight of the microfiber fabric not impregnated with said at least one surfactant.

9. The wipe as claimed in claim 1 , wherein the wipe comprises at least 5% by weight of impregnated surfactants relative to the weight of the microfiber fabric not impregnated with said at least one surfactant.

10. The wipe as claimed in claim 9 , wherein the wipe comprises from 15% to 35% by weight of impregnated surfactants relative to the weight of the microfiber fabric not impregnated with said at least one surfactant.

11. The wipe as claimed in claim 1 , wherein the woven or knitted microfiber fabric comprises at least 90% by weight of microfibers.

12. The wipe as claimed in claim 11 , wherein the woven or knitted microfiber fabric comprises at least 95% by weight of microfibers.

13. The wipe as claimed in claim 12 , wherein the woven or knitted microfiber fabric comprises 100% by weight of microfibers.

14. The wipe as claimed in claim 1 , wherein the hydrophilic polymer microfibers and lipophilic polymer microfibers are obtained from hydrophilic and lipophilic polymer fibers of composite structure, by splitting said composite structure, after weaving or knitting.

15. The wipe as claimed in claim 1 , wherein the woven or knitted microfiber fabric is knitted and has a number of stitches per cm 2 of greater than or equal to 300.

16. The wipe as claimed in claim 1 , wherein the microfiber fabric comprises from 60 to 85% by weight of polyester microfibers and from 15 to 40% by weight of polyamide microfibers.

17. A process for preparing a wipe as claimed in claim 1 , comprising:
the impregnation of a woven or knitted microfiber fabric by a solution comprising at least one solvent and at least one surfactant having a hydrophilic-lipophilic balance (HLB)≥5; and
the drying of the impregnated textile so as to eliminate said solvent.

18. A process for imparting anti-fog properties to an article having an outer surface having a static contact angle with water of less than 50°, comprising the application of at least one surfactant to said outer surface, by wiping this surface using a dry wipe, comprising a woven or knitted microfiber fabric impregnated with said at least one surfactant, wherein the surfactant has a hydrophilic-lipophilic balance (HLB)≥5, and the microfiber fabric comprises hydrophilic polymer microfibers and lipophilic polymer microfibers;
the wipe not comprising a dry microfiber fabric obtained by i) impregnation of a microfiber fabric comprising microfibers made of polymers or of mixtures of polymers comprising polyester units and polyamide units, with a surfactant composition containing at least one surfactant of formula F(CF 2 ) y —(CH 2 —CH 2 O) x+1 H (VIII), in which x is an integer varying from 1 to 14 or x is an integer varying from 2 to 14, y is an integer less than or equal to 10, the compounds of formula (VIII) for which y=6 representing at least 90% by weight of the compounds of formula (VIII) present in the composition, then ii) drying of this microfiber fabric.

19. The process as claimed in claim 18 , wherein the outer surface of said article comprises polyoxyalkylene groups, said surface having been obtained by grafting at least one organosilane compound having a polyoxyalkylene group and at least one silicon atom bearing at least one hydrolyzable group.

20. The process as claimed in claim 19 , wherein said polyoxyalkylene group comprises less than 80 carbon atoms.

21. The process as claimed in claim 18 , wherein the surfactant is a polyoxyalkylene sorbitan fatty acid ester or a polyethylene glycol alkyl monoether.

22. A process for cleaning an article having an outer surface, comprising the wiping of said outer surface using a dry wipe as defined in claim 1 , said wipe comprising said woven or knitted microfiber fabric impregnated with said surfactant.

23. The process as claimed in claim 22 , wherein the outer surface of the article has a static contact angle with water of greater than or equal to 70°.

24. The process as claimed in claim 22 , wherein the surfactant is a polyoxyalkylene sorbitan fatty acid ester or a polyethylene glycol alkyl monoether.

25. An assembly comprising a dry wipe and a pair of spectacles comprising lenses having a substrate, the outer surface of which has a static contact angle with water of less than 50°, the dry wipe comprising a woven or knitted microfiber fabric impregnated with at least one surfactant,
wherein the surfactant has a hydrophilic-lipophilic balance (HLB)≥5, and the microfiber fabric comprises hydrophilic polymer microfibers and lipophilic polymermicrofibers;
the wipe not comprising a dry microfiber fabric obtained by i) impregnation of a microfiber fabric comprising microfibers made of polymers or of mixtures of polymers comprising polyester units and polyamide units, with a surfactant composition containing at least one surfactant of formula F(CF 2 ) y —(CH 2 —CH 2 O) x+1 H (VIII), in which x is an integer varying from 1 to 14 or x is an integer varying from 2 to 14, y is an integer less than or equal to 10, the compounds of formula (VIII) for which y=6 representing at least 90% by weight of the compounds of formula (VIII) present in the composition, then ii) drying of this microfiber fabric.

26. The assembly as claimed in claim 25 , wherein the substrate is coated with a precursor coating of an anti-fog coating, having a static contact angle with water of less than 50°, obtained by grafting at least one compound having a polyoxyalkylene group.

27. The assembly as claimed in claim 26 , wherein said polyoxyalkylene group i

Assignees

• Satisloh Ag

Inventors

• Cadet Mamonjy
• Cretier Annette

Classifications

• G02C13/006

  Devices specially adapted for cleaning spectacles frame or lenses · CPC title

• C11D17/049

  Cleaning or scouring pads; Wipes · CPC title

• G02B27/0006

  with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B) · CPC title

• A47L13/17

  containing cleaning agents (A47L13/19 takes precedence {; chemical compositions C11D17/049}) · CPC title

• B05D1/02

  performed by spraying · CPC title