HEAVY-DUTY LAUNDRY DETERGENT WIPE WITH CONTROLLED PHASE EMISSION DIFFUSION OF THE WASHING ACTIVE SUBSTANCES

Abstract

The present invention discloses a method for manufacturing a heavy-duty laundry detergent wipe, characterized by the following steps: (a) hydrophobic coating of a hydrophilic substrate or hydrophilic coating of a hydrophobic substrate for obtaining a multilayered carrier substrate which is solid at ambient temperature, (b) applying a dispersion consisting of a liquid washing detergent and a water insoluble functional additive to the substrate. The present invention further discloses a heavy-duty laundry detergent wipe, comprising a substrate which is solid at ambient temperature and a dispersion applied to the substrate and consisting of a liquid washing detergent and a water insoluble functional additive, characterized in that the carrier substrate consists of a hydrophilic substrate provided with a hydrophobic coating or of a hydrophobic substrate provided with a hydrophilic coating.

Claims

1. A method for the manufacturing of a heavy-duty laundry detergent wipe comprising the steps: (a) obtaining a multilayered carrier substrate by (i) hydrophobic coating of a hydrophilic substrate or, (ii) hydrophilic coating of a hydrophobic substrate, whereby said multilayered carrier substrate is solid at ambient temperature; and (b) applying a dispersion comprising a liquid washing detergent and a water insoluble functional additive to the substrate.

2. The method of claim 1, wherein the said coating of the said substrate is carried out on one side only.

3. The method of claim 1, wherein the said coating of the said substrate is carried out on both sides.

4. A heavy-duty laundry detergent wipe, comprising a substrate which is solid at ambient temperature and a dispersion applied to the substrate said dispersion comprising a liquid washing detergent and a water insoluble functional additive, whereby the carrier substrate comprises a) a hydrophilic substrate provided with a hydrophobic coating or b) a hydrophobic substrate provided with a hydrophilic coating.

5. The heavy-duty laundry detergent wipe of claim 4, wherein the said coating of the said substrate is provided on one side only.

6. The heavy-duty laundry detergent wipe of claim 4, wherein the said coating of the said substrate is provided on both sides.

7. The heavy-duty laundry detergent wipe of claim 4, wherein the water insoluble functional additive comprises a zeolite and/or a phyllosilicate.

8. The heavy-duty laundry detergent wipe of claim 4, wherein the liquid washing detergent of the dispersion has a viscosity greater than 500 mPas.

9. The heavy-duty laundry detergent wipe of claim 4, wherein the dispersion is statistically fixed to the carrier substrate.

10. The heavy-duty laundry detergent wipe of claim 4, further comprising any known component of a heavy-duty laundry detergent.

11. The heavy-duty laundry detergent of claim 4, wherein the substrate to be coated is hydrophilic and is cellulose, viscose or other a cellulose derivates.

12. The heavy-duty laundry detergent wipe of claim 4, wherein the substrate to be coated is hydrophilic and is selected from cellulose, viscose, and a cellulose derivate and wherein the hydrophobic coating is carried out by using polymeres, long-chain fat alcohols, waxes, oils or shea butter.

13. The heavy-duty laundry detergent wipe of claim 4, wherein the substrate to be coated is hydrophobic and is polyethylene, polypropylene or polyester.

14. The heavy-duty laundry detergent wipe claim 4, wherein the substrate to be coated is hydrophobic and is polyethylene, polypropylene or polyester and wherein the hydrophilic coating is carried out by using polar waxes, polar oils, polyvalent fat alcohols, sulphonated compounds, sulphated compounds, alkoxylated compounds, amidated compounds, gluconated compounds, or other compounds having a functional hydrophilic head moiety.

Description

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Thenot controllablerelease over time of the washing active substances of single dose laundry detergents according to the prior art is shown in FIG. 1: (1) shows the curve for liquid washing detergents filled in small polymer pouches, (2) shows the curve for laundry detergents mixed with fat alcohols and (3) shows the curve for the laundry detergent wipe according to DE 10 2010 060 126 A1. Surprisingly, the heavy-duty laundry detergent wipe according to the present invention with controlled phase emission diffusion of the washing active substances could be realized by hydrophobic coating of hydrophilic substrates and hydrophilic coating of hydrophobic substrates, resp., wherein the resulting substrate, which is solid at ambient temperature, is then provided with a laundry detergent dispersion as disclosed in DE 10 2013 014 015. The hydrophobic and hydrophilic coating, resp., can be carried out by impregnating, spraying or one- or two-sided coating on the surfaces of the substrate to be coated, namely on both sides of the substrate to be coated (in FIG. 2, (1) designates hydrophobic coating on both sides of a hydrophilic substrate and (2) hydrophilic coating on both sides of a hydrophobic substratehydrophobic=black/hydrophilic=white) or only on one side. The following hydrophilic substrates are particularly useful: [0020] cellulose [0021] viscose [0022] other cellulose derivates

[0023] In the area of hydrophobic substrates the following are particularly useful: [0024] polytethylene [0025] polypropylene [0026] polyester

[0027] For hydrophobic coating of hydrophilic substrates the following are particularly useful: [0028] polymers [0029] long-chain fat alcohols [0030] waxes [0031] oils [0032] shea butter

[0033] Hydrophilic coating of hydrophobic substrates could be achieved in particularly by using: [0034] polar waxes [0035] polar oils [0036] polyvalent fat alcohols [0037] sulphonated compounds [0038] sulphated compounds [0039] alkoxylated compounds [0040] amidated compounds [0041] gluconated compounds [0042] other compounds with functional hydrophilic head moiety

[0043] Due to the surface activation of the carrier substrate resulting from hydrophilic and hydrophobic, resp., coating dual activity zones could be realized during manufacturing of the laundry detergent wipe, wherein the zones are decisive for the addition of the laundry detergent dispersion. A primary addition of the laundry detergent dispersion in the outer zones of the carrier substrate can be achieved by using a hydrophilic substrate with hydrophobic coating. This results in an acceleration of the phase emission diffusion. This arrangement is particularly useful for short washing programs, for example. The inverse system (hydrophilic coating of hydrophobic substrates) shows a primary addition in the center of the carrier substrate such that the phase emission diffusion can be selectively decelerated. The intensity of the surface treatment (layer thickness of outer the treated surface) and/or the variation of the polarities of the surface activating additives (i.e., of the substances used for hydrophobic and hydrophilic, resp., coating) permits a selective control of the process of phase emission diffusion of a laundry detergent wipe for the first time.

[0044] The present invention can be used in all categories of laundry detergents. For example, the following laundry detergent solutions were used:

[0045] Heavy Duty Laundry Detergent Wipe (Universal):

TABLE-US-00001 anionic tensides nonionic tensides phosphonates/complex builders C10-C18 fatty acid salts optical brighteners enzymes builders (polycarboxylates, zeolites, phyllosilicates) stabilizers (propylene glycol, glycerin, borax, inulin) scents preservatives soil-release polymer pH regulators

[0046] Color Laundry Detergent Wipe (Color):

TABLE-US-00002 anionic tensides nonionic tensides phosphonates/complex builders C10-C18 fatty acid salts colorants color transfer protection hydrotropes (sodium cumenesulfonate) enzymes builders (polycarboxylates, zeolites, phyllosilicates) stabilizers (propylene glycol, glycerin, borax, inulin) scents preservatives soil-release polymer pH regulators

[0047] Black Laundry Detergent Wipe (Black):

TABLE-US-00003 anionic tensides nonionic tensides phosphonates/complex builders C10-C18 fatty acid salts colorants color transfer protection enzymes builders (polycarboxylates, zeolites, phyllosilicates) stabilizers (propylene glycol, glycerin, borax, inulin) opacifiers scents preservatives pH regulators

[0048] White Laundry Detergent Wipe (White):

TABLE-US-00004 anionic tensides nonionic tensides C10-C18 fatty acid salts optical brighteners soil-release polymer color transfer protection enzymes builders (polycarboxylates, zeolites, phyllosilicates) stabilizers (propylene glycol, glycerin, borax, inulin) colorants opacifiers scents preservatives pH regulators

[0049] Fine Laundry Detergent Wipe:

TABLE-US-00005 anionic tensides nonionic tensides C10-C18 fatty acid salts phosphonates/complex builders color transfer protection enzymes builders (polycarboxylates, zeolites, phyllosilicates) stabilizers (propylene glycol, glycerin, borax, inulin) scents defoamers preservatives pH regulators

[0050] Wool Laundry Detergent Wipe:

TABLE-US-00006 anionic tensides nonionic tensides amphoteric tensides C10-C18 fatty acid salts phosphonates/complex builders color transfer protection builders (polycarboxylates, zeolites, phyllosilicates) scents preservatives opacifiers conditioners pH regulators

[0051] It was found that for wool and fine laundry detergent wipes the use of hydrophilic substrates with hydrophobic coating was suitable because shorter washing programs with lower temperatures are used. In the application of laundry detergent wipes for white, black, color and universal laundry the use of hydrophobic substrates with hydrophilic coating was found to be successful because the phase emission diffusion could be reduced in these cases.

[0052] The water insoluble functional additive of the heavy-duty laundry detergent dispersion can comprise a zeolite and/or a phyllosilicate. The liquid washing detergent of the dispersion can have a viscosity of larger than 500 mPas. The dispersion is statistically fixed to the carrier substrate. Furthermore, it can comprise all known components of a heavy-duty laundry detergent.