JPH0360879B2 - - Google Patents

Description

[Detailed description of the invention]

FIELD OF THE INVENTION The present invention relates to a wiping article suitable for use in cleaning soiled surfaces in the presence of water. The wiping article is particularly suitable for cleaning hard surfaces such as those found in domestic kitchens and bathrooms, or for washing the surfaces of a person's body, especially when taking a shower. [Prior art and its problems] When cleaning hard surfaces in the kitchen or bathroom, such as floors, sinks, bathtubs or work surfaces used for cooking, for hygienic reasons wipes such as non-woven or paper kitchen rolls are used. Goods (wiping)
It is convenient to use an article to absorb scattered water droplets or clean surface dirt.
Wiping articles of this type can be used dry when used to remove spills of aqueous or fatty liquids, or wet when the surface to be cleaned is relatively dry. It can also be used in a closed state. Whether used in the wet or dry state, wiping articles of this type generally work more effectively in the presence of detergent-active compounds that are separately applied to the wiping article or surface during use. German Publication No. 2625176 (Sitzkedanz)
proposes to provide a cleaning cloth for hard surfaces. The cleaning fabric is made from a nonwoven fabric containing a meltable supply of active detergent, and the detergent is applied from the molten state in stripes onto the surface of the nonwoven fabric. A water-insoluble hydrophobic plastic can be applied to the fabric to separate it into areas with a detergent coating and untreated areas without detergent. However, when these types of cleaning cloths are used in the presence of water to clean hard surfaces, the impregnated active detergents leach out and are washed away, leaving an article free of soap or detergent after a single use. It has its drawbacks. Furthermore, cleaning cloths of this type can also disintegrate, especially if low wet strength papers are used in their manufacture. Furthermore, when taking a shower, it is common to spray water over the entire surface of the body, including the hair. Traditionally, shower gel preparations are used in soap bars or semi-liquids containing liquid detergent to facilitate cleaning by forming foam on the skin surface. Additionally, it is common to use liquid or semi-liquid shampoo to wash hair when showering. Therefore, when taking a shower, it is customary to use at least one, and often two, products to clean the surface of the body, none of which are very convenient to use, and the soap bar can easily slip from the fingers or cause shower gel or shampoo bottles or other containers to be turned over or dropped, which is an inconvenience and a clear waste of product. It would therefore be advantageous to provide a means to avoid these drawbacks and make showering more convenient. It has been proposed to impregnate fibrous tissue paper or cloth with detergent compositions for use in manual dishwashing or for bathing babies.
However, in both cases only a relatively small amount of water is involved, so that when a large amount of running water is used, for example during a shower, the amount of detergent retained on the tissue paper or cloth is insufficient. Furthermore, European patent application no.
It has also been proposed to provide disposable cleaning cloths made from plastic, fabric or paper, which cleaning cloths are made of sodium lauryl ether sulfate (10
%), the sodium salt of N-β-hydroxyethyl-N-β-carboxyethyl fatty acid amidoethylamine (5%) and coconut oil fatty acid diethanolamide (2%). Additionally, U.S. Patent No. 4,303,543 (Proctor
A dry article for cleansing the skin has also been proposed by John & Gambre, Inc., which is impregnated with a composition consisting of soap and stearyl ammonium laurate (i.e., a stearic acid skin conditioning agent). Made of absorbent paper or woven or non-woven fabric. However, when these prior art articles are used to wash body surfaces during a shower, the soap impregnated with them also causes the active detergent to leach out or be washed away prematurely, causing the soap or detergent to evaporate before the cleaning is complete. It has the disadvantage that missing items remain. Additionally, articles of this type have a tendency to disintegrate during use, especially if low wet strength papers are used in their manufacture. Accordingly, previous proposals describing detergent-impregnated wiping cloths for use in cleaning hard surfaces of the kind found in kitchens and bathrooms, or for cleaning body surfaces when taking a shower, have been limited to It is clear from the above that as a result of rapid leaching, wiping cloths of this type have the common problem of having a relatively short service life and in any case not being reusable. For example, to solve the problems mentioned above,
An improved detergent-impregnated wiping article has now been developed for use in cleaning soiled surfaces, particularly in the presence of water. The article is capable of controlled release of the active detergent and can be used for extended periods of time or many times before the active detergent is exhausted and discarded. in use,
Release of the active detergent is controlled by a moisture barrier applied to at least a portion of the surface of the article. moreover,
The article has a wet strength such that it is resistant to disintegration when used under normal use conditions in cleaning soiled surfaces. After use, this article can be used again after being simply rinsed with water to remove dirt if necessary. SUMMARY OF THE INVENTION Accordingly, the present invention provides a substantially dry feel wiping article suitable for use in cleaning soiled surfaces in the presence of water, the article having a detergent active an absorbent substrate having a water absorption capacity of at least 1 g/g in the form of a sheet impregnated with a compound and a moisture barrier for impeding the ingress of water into the absorbent substrate, as a surface coating on both sides of said absorbent substrate; The moisture barrier on one side coincides with the moisture barrier on the other side to cover at least 100% of the area of the absorbent substrate impregnated with the detergent-active compound.
It is characterized by a moisture barrier covering 10% to 95% of the total area of each side of the sheet so as to form a sander beach that encloses 10% of the total surface area of the sheet. Absorbent Substrate The absorbent substrate which acts as a carrier for the impregnated detergent active compound preferably has a
It is a non-woven sheet of cellulose fibers having a thickness of 1000 μm and which is particularly suitable in terms of its ability to rapidly absorb water when used to clean soiled surfaces. The absorbent substrate of the article can also be other fibrous materials such as polyamides, polyesters, and polypropylenes or mixtures of these fibers that are particularly useful in providing additional wet strength to the article. Furthermore, suitable binders such as styrene-butadiene latexes, or acrylic binders (for example PRIMAL HA8), or polyvinyl acetate, or for example self-crosslinked vinyl acetate/ethylene copolymer emulsions (for example VINAMUL )R32300 and R32337)
Polymer emulsions such as self-crosslinking vinyl acetate/acrylic copolymer emulsions (eg, VINACRYL 4315) can also be incorporated to increase the wet strength of the absorbent substrate. Primal polymer emulsions are manufactured by Rohm and Haas and Vinyl and Vinacrylic polymer emulsions are manufactured by Vinyl Products (Primal, Vinamul and Vinacrylic are registered trademarks). The absorbent substrate can be made from paper, in which case it generally consists of relatively short length cellulose fibers, and additives such as hydroxyethyl cellulose are used to provide added wet strength. The absorbent substrate should have a water absorption capacity of at least 1 g/g, preferably at least 3 g/g. That is, it should be able to absorb an amount of water at least equal to its own weight, preferably at least three times its own weight. If the substrate includes a binder or additional fibrous material to increase its inherent wet strength, this may reduce the water absorption capacity of the substrate compared to a substrate without binder. Therefore, the type of binder or additional fibers present in the substrate for the purpose of increasing the wet strength as well as the binder is insufficient to reduce its water absorption capacity below a minimum value of 1 g/g. The amount of fiber added is important to choose. The water absorption capacity of a substrate can be determined gravimetrically by simply weighing a dry piece of substrate, immersing it in water again, removing excess water, and weighing.
The difference between these two weighed values divided by the dry weight is the water absorption capacity expressed as g/g. Preferably, the absorbent substrate has at least
It should have a minimum wet tensile strength of 50 Newtons (N/m). The minimum wet tensile strength of the matrix may exceed 50 N/m, preferably at least 80 N/m, particularly preferably at least 95 N/m.
It is. There is no clear upper limit for the wet tensile strength of the matrix, but it is believed that it will not exceed 1000 N/m and generally will not exceed 500 N/m. Wet tensile strength can be measured by the method recommended by the European Disposable and Unwoven Association (EDANA) as DIN 53857. In this method, a substrate width of 50 mm and a
A substrate length of mm is used as standard. 150 per minute
A jaw separation rate of mm was used in the test;
The wet tensile strength of a given test substrate is expressed as Newtons per meter (N/m). The wet tensile strength of a machine-mounted absorbent substrate made as a continuous web and conveniently stored as a roll is:
Generally, it should be stated that it is larger in the direction of the web, or "longitudinal," than in the direction perpendicular to the web, or "transverse." Therefore, the above minimum wet tensile strength applies in the direction exhibiting the lower or minimum wet tensile strength, ie generally the "transverse direction." A suitable absorbent substrate is a non-woven fabric made of cellulose fibers, an example of which is MITSUBISHI TCF408, a 100% copper ammonia rayon spun-bonded non-woven fabric with the following technical details: Nominal basis weight (g/m ² ) 82.5 Thickness (μm) 500 Dry tensile strength: Machine direction (N/m) 635 Dry tensile strength: Transverse direction (N/m) 565 Wet tensile strength: Machine direction 498 Wet tensile strength: Transverse direction (N/m) /m) 447 Absorbent Capacity (g/g) 5 Another suitable absorbent nonwoven substrate made of cellulose fibers is AIRTEX SC150;
namely, a resin-bonded cellulose pulp obtained from James River Corporation and having the following technical details: Nominal basis weight (g/m ² ) 86 Thickness (μm) 850 Dry tensile strength: machine direction (N /m) 450 Dry tensile strength: Transverse direction (N/m) 347 Wet tensile strength: Longitudinal direction (N/m) 323 Wet tensile strength: Transverse direction (N/m) 297 Absorption capacity (g/g) 11 Resin binder (%) 25 The resin that binds Airtex SC150 is a self-crosslinking ethylene/vinyl acetate copolymer emulsion. Other examples of absorbent substrates are non-woven fabrics made of cellulose fibers, such as STORALENE 715:50 or STORALENE 717:50, available from Strakotsparberg (Sweden), which contain the following ingredients: : wt% cellulose fiber (wood pulp) 33 cotton linter 29 rayon 17 polyamide 4 binder ^* 17 *Stralene 715:50 contains acrylic binder,
Strallene 715:50 contains a polyvinyl acetate binder. Technical details related to Strallene 715:50 and Strallene 717:50 are provided below:

【table】

[Specific examples of the invention]

If the wiping article is intended for use in washing the surfaces of the human body, for example when taking a shower, the entire absorbent substrate is preferably impregnated with detergent-active compounds and optionally additives. In contrast, the moisture barrier preferably covers 20-70% of the total surface area of the absorbent substrate. For purposes of using the wiping article in cleaning hard surfaces, the absorbent substrate preferably has only one portion (i.e., the “first portion”) with the detergent-active compound and the remaining portion of the substrate ( That is, the "second portion") is impregnated with the detergent active compound and optionally adduct so as to be substantially free of this detergent active compound. During use in cleaning hard surfaces, the surface of an absorbent substrate is used to control and reduce the rate at which water penetrates into the article and thus leaches detergent-active compounds and other water-soluble or water-dispersible adducts. The water-soluble moisture barrier applied preferably covers the "first portion" on both sides of the substrate, as described above, to form a sandwich that encapsulates the detergent active compound contained in the "first portion." In this embodiment of the invention, the surface area of the "first portion" with the detergent active compound is between 10 and 10 of the total surface area.
It can be 90% and therefore the "second part"
The surface area of can also be 10-90% of the total surface area. Preferably, the surface area of each portion should be between 40 and 60%, ideally about 50% of the total surface area of the absorbent substrate. The first portion may represent a single region of the absorbent substrate or may represent multiple regions separated from each other by a second portion. Preferably, the "first part" and the "second part"
indicates a parallel striped, twilled or checked area in which the areas of the "first part" and the area of the "second part" alternate. Accordingly, the area of the absorbent substrate designated as the "first part" is suitable for delivering detergent active compounds when the article is used to clean soiled hard surfaces, and the region of the absorbent substrate designated as the "second part" The area of the absorbent substrate is intended to be suitable for collecting soils detached from the surface or for scrubbing the surface by the action of detergent-active compounds. The article can be rinsed to remove accumulated soil from the "second part" without significant loss of detergent active compounds from the "first part" and then reused. Providing two or more layers of absorbent substrate can further improve the durability, bulk, and performance of the wiping article in delivering detergent active compounds and moving liquids to and from surfaces during cleaning operations. can. For this purpose, adhesives can be used to laminate separate sheets of absorbent substrate to bring them into close contact with each other. Adhesives suitable for use in laminating the sheets of absorbent substrates include, for example, hydrophobic polymer emulsions, which may also be used to form moisture barriers as described above, or crosslinkable polymers or hot melt adhesives. include. The invention will now be further explained with reference to the accompanying drawings: As shown in Figures 1 and 2, the wiping article consists of a sheet 10 of absorbent substrate measuring 37 cm x 29 cm with a thickness of 500 μm, to which a detergent active compound is applied. The parallel stripes 11 are impregnated. Each strip of detergent active compound is coated with a moisture barrier 12 on each side of the sheet to form a series of sander beaches, particularly as shown in FIG. The width of each moisture barrier stripe is slightly wider than the corresponding detergent active compound stripe. The wiping article shown in FIG. 3 has the same detergent active compound and moisture barrier stripe configuration as shown in FIGS. 1 and 2, except that
Two sheets of absorbent substrate are "welded" into a five-layer sander beach by stripes of moisture barrier 12.
to form a double laminate wiping article. The wiping article shown in FIG. 4 has a similar structure to that shown in FIGS. 1 and 2, but
Further particulate abrasive material 13 is added and supported by stripes 11 of each detergent active compound. The wiping article shown in FIG. 5 has a structure similar to that shown in FIG.
is supported by moisture barrier stripes 12 instead of detergent active compound stripes 11. Each of the embodiments according to the invention shown in FIGS. 1-5 are initially supplied dry, ie they are dry to the touch. In use, these can be wetted with water and used to clean the solid surface, or they can be placed dry on a pre-wetted solid surface and then the surface can be cleaned and any remaining moisture wicked away. It can be used for. Manufacture of Wiping Articles The wiping articles of the present invention are manufactured by simply applying to a piece or continuous roll of absorbent substrate a suitable liquid detergent composition comprising a detergent active compound and optionally other detergent additives. can do. The liquid detergent composition can be applied uniformly or in a desired pattern over the absorbent substrate, and the impregnated substrate thus obtained is then dried in hot air. The moisture barrier can then be applied to both sides of the dried article by any suitable method, for example printing using a gravure printing roller or hot melt extrusion techniques are suitable. Additionally, a drying step and/or a heating step is used to dry the moisture barrier material and/or to crosslink the selected moisture barrier material if crosslinking is required. The article having a dry feel obtained in this way is
They can be packaged individually, for example in pilastic pouches, until needed for use, or they can be packaged in bulk or supplied as a continuous roll for use in a suitable dispenser. Evidence showing controlled release of detergent active compounds from wiping articles having a partial coating of hydrophobic moisture barrier material Strallene 717, each of dimensions 220 mm x 300 mm, pre-soaked in a composition containing a detergent active compound and a green dye : 50 strips of fabric are coated on both sides with stripes of MESOWAX, a hydrophobic moisture barrier material, and these stripes are aligned precisely with each other so that predetermined areas of this fabric are effectively placed between the same areas of MESOWAX. I sandwiched it in. Therefore,
If the article is subsequently immersed in water, the sandwiched portions of the impregnated fabric are effectively protected against direct contact with water. However, by "wicking" along and between the cellulose fibers of Stralane 717:50 through adjacent uncoated areas and by gradual loss through the barrier, the detergent active compound within each "Sandermanch" is , can be slowly extracted. Impregnated and partially coated strips of Strallene cloth,
Leaching was carried out at 40°C by immersing each in 10 beakers each containing 250 ml of tap water. The immersion time in each beaker containing water was 30 seconds. The amount of dye soaked was measured spectrophotometrically to assess the amount of detergent active compound leached during each dip. The leaching rate of the detergent active compound is proportional to the leaching rate of the dye. This experiment was repeated using paraffin wax as the moisture barrier material and also using uncoated stralene for comparison purposes. These results are shown in Table 1:

Table: The above results show that the presence of a hydrophobic moisture barrier, such as a mesowax or a paraffin wax, significantly reduces the rate at which detergent active compounds are leached from a wiping article after 5 minutes of contact with water. It is concluded. Of the coated articles, those with a Mesowax moisture barrier covering 65% of the total surface area retained 13% by weight of the detergent active compound originally impregnated. Similarly, the corresponding figure for a paraffin wax-coated article (53% coverage) is 22%, with detergent activity resulting from coverage of at least half of the total surface of a detergent-impregnated article with a moisture barrier after repeated contact with fresh water. It was confirmed that the compound was fed continuously and in a controlled manner. Applications of wiping articles The wiping articles of the present invention can be used to wash the skin surface, and are particularly useful when taking a shower; they can also be used to wash hair or wash the entire surface of the body. can. The article is preferably capable of generating a large amount of suds throughout the shower and has a wet strength such that it is resistant to disintegration when used under normal use conditions. Furthermore, this wiping article can also be used when taking a bath. This wiping article is particularly convenient in that it can be placed in a sports bag, handbag or pocket in a dry state, or that each article contains a predetermined amount of detergent and other skin active ingredients that may be present in the composition. It is. These are intended to be disposable and therefore do not pose hygiene issues such as reusable bath flannels. The ability of the wiping article to gradually release detergent active compounds is advantageous during showering in that the article can generate suds for the entire duration of a typical shower (ie, up to 5 minutes). Furthermore, given this advantage, each wiping article can have a lower "amount" of detergent active compound than the corresponding uncoated article. The wiping articles of the invention can also be used to clean hard surfaces, and for this purpose they are conveniently packed into plastic bags or carton boxes, from which they can be removed before use. Wiping articles of this type are particularly suitable for repeated use in cleaning dirty hard surfaces, such as kitchen work surfaces, bathrooms and lavatories or floors. They therefore prove particularly useful in schools, restaurants, cafeterias and hospitals as well as in the home. The present invention will be explained below with reference to Examples. Example 1 This example illustrates a non-abrasive wipe according to the present invention for kitchen hard surfaces. A cloth piece of Mitsubishi TCF408 as an absorbent substrate was impregnated with an aqueous solution containing an active detergent having the following composition: wt% TEXOFOR B1 (higher fatty alcohol containing 16EO) 20 ARQUAD 16/ 50 (Palmitoyl Quaternary Ammonium Chloride - 50% AD) 10 Yellow 2G Dye 0.1 Fragrance 0.2 Water 69.7 The water-insoluble moisture barrier used as a delayed release agent was VINAMUL 3231. Individual wipes were made by the following procedure: Detergent solution was "printed" onto the substrate using a foam rubber pad to create detergent stripes ("first section") each approximately 8 mm wide. This detergent solution is allowed to dry at room temperature and then a paint brush is used to apply a moisture barrier to both sides of the substrate, covering the detergent stripes and removing any untreated material between these stripes without unduly destroying the underlying detergent. Only a small amount was present on either side of each stripe over the area (the "second part"). Dry the moisture barrier at room temperature and then in an oven at 140°C for 5 minutes.
Crosslinking was achieved by heating for minutes. The wipe thus prepared had the following specifications: Total dimensions (mm) 300×370 Total area (m ² ) 0.111 Area of the “first part” covered by detergent (m ² )
0.0456 Area % of "first part" 40% Area % coated with delayed release agent 45% Dry weight of substrate (g) 9 Dry weight of first part (g) 3.6 Dry weight of substrate + detergent (g) 14 Dry weight of detergent (g) 5 Dry weight of wipe (g) 21 Dry weight of moisture barrier (g) 7 Loading ratio of detergent to substrate (5:36) = 1.39 Moisture added to allow sustained release of detergent using a barrier. The detergent stripes contain a dye (yellow 2G) that acts as an indicator for detergent release. Thus, when the wipe is no longer yellow, the detergent has disappeared. Example 2 This example illustrates a disposable shower flannel according to the present invention. Strallene (715:50) fabric strips containing 40% by weight cellulose fibers were soaked in a detergent composition containing the following ingredients: % by weight sodium lauryl ether sulfate-2EO
(28%AD) 30.5 Coconut Diethanolamide 2.5 Formalin (36.6%) 0.1 Other minor ingredients including colorants, fragrances and inorganic salts
3.79 Water to 100 Adjusted pH to 5.6 with citric acid. After soaking in the above detergent composition, the Strallene cloth pieces were dehydrated and then air dried. Parallel stripes of wax emulsion are then applied with a paint brush to corresponding areas on both sides of the detergent-impregnated fabric to cover 40% of the total surface area, thus leaving 40% of the fabric between the striped areas. I made it to Sandwich. When Mesowax is air-dried,
Visible orange streaks of wax material remained on the fabric. The wiping article thus produced was examined for dimensions, weight and other data and the results are shown below: Dimensions of the wiping article (mm) 225×287 Area of the wiping article (m ² ) 0.0646 Mesowax area (m ² ) 0.0258 % of total area covered by Mesowax (%) 40 Dry weight of wiping article (g) 8.52 Dry weight of absorbent substrate: Stralene (g) 3.14 Dry weight of detergent composition (g) ) 5.38 Filling amount of anionic detergent (g/g matrix)
0.67 Total water-soluble solids loading (g/g matrix)
1.71 Wet tensile strength: cross-web direction (N/m) 274 Wet tensile strength: machine direction (N/m) 354 Example 3 The procedure described in Example 2 was repeated, except that the absorbent substrate was impregnated. The detergent composition prepared had the following composition: Ingredients wt% MIRANOL 2 MCA Mod☆ 45 EMPICOL ESB 3☆☆ 30 Citric acid 0.1 Fragrance, colorant Sufficient water Up to 100☆ Cocoan Fuocarboxyglycinate + Sodium Lauryl Sulfate + Hexylene Glycol (48
%AD) ☆☆ Sodium Lauryl Ether Sulfate (3EO) Example 4 This example illustrates a disposable shower flannel according to the present invention. A piece of Stralene (715:50) containing 40% by weight cellulose fibers was soaked in a detergent composition containing the following ingredients: % by weight Milanol 2MCA Mod 45 Empicol ESB3 30 Citric acid 0.1 Fragrance, colorant Enough The Strallene cloth pieces after soaking in the above detergent composition were drained of water up to 100 ml of water and then air-dried. Vinalum was then used as a water-insoluble moisture barrier.
3240 parallel stripes were applied to corresponding areas on both sides of the detergent-impregnated fabric to cover 45% of the total surface area, and 45% of the fabric was sandwiched between the striped areas. The dimensions and other data for the wiping article thus prepared were similar to the data for the article described in Example 2. Example 2 was conducted by a panel of three testers.
The wiping articles prepared as described above in Sections 4 to 4 were evaluated for use in showers. A similar article without the polymer coating was also tested on this panel. In each case, the wiping articles were weighed before showering and after one use in the shower to determine the amount of residual active detergent retained on each article. The results are shown in Table 2:

Table: These results indicate that a significant proportion of detergent is lost from the wiping article after use if a protective water-insoluble moisture barrier is not applied. On the contrary, the presence of this type of barrier significantly reduces the loss of detergent during use, allowing it to be used for longer than normal times under the shower, or for continuous repeated use. can.

[Brief explanation of drawings]

FIG. 1 is a plan view of a wiping article, FIG. 2 is a cross-sectional view of the article shown in FIG. 1, FIG. 3 is a cross-sectional view of a hard surface wiping article having a laminated structure, and FIGS. 4 and 5 FIG. 1 is a cross-sectional view of an abrasive wiping article. 10... Sheet of absorbent substrate, 11... Stripes of detergent active compound, 12... Moisture barrier, 13...
Granular abrasive material.

Claims (1)

Claims: 1. A substantially dry-feel wiping article for use in cleaning soiled surfaces in the presence of water, comprising at least 1 g/g in the form of a sheet impregnated with a detergent-active compound. an absorbent substrate having a water absorption capacity of moisture barrier and covering 10% to 95% of the total area of each side of the sheet so as to form a sander beach that encapsulates at least 10% of the area of the absorbent substrate impregnated with the detergent-active compound. A wiping article characterized by being provided with a barrier. 2. The article according to claim 1, wherein the absorbent substrate is a nonwoven sheet made of cellulose fibers having a thickness of 100 to 1000 μm. 3. Article according to claim 1 or 2, characterized in that the absorbent substrate comprises a fibrous material selected from polyamide, polyester, polypropylene or mixtures thereof. 4. Article according to any one of claims 1 to 3, characterized by a minimum wet tensile strength of at least 50 N/m. 5. Article according to any one of claims 1 to 4, characterized by a wet tensile strength of between 95 and 1000 N/m. 6 The detergent active compound is anionic, nonionic,
6. Article according to any one of claims 1 to 5, characterized in that it is selected from amphoteric, zwitterionic or cationic detergent active compounds or compatible mixtures thereof. 7. Article according to any one of claims 1 to 6, characterized in that the detergent active compound consists of soap. 8. Article according to any one of claims 1 to 7, characterized in that at least a portion of the absorbent substrate is impregnated with a detergent active compound at a concentration of 0.2 g/g. 9 0.4 to 2 g/g on at least part of the absorbent substrate
9. Article according to any one of claims 1 to 8, characterized in that it is impregnated with a detergent active compound at a concentration of g. 10 Stabilizers, disinfectants, fragrances, colorants, preservatives,
10. Article according to any one of claims 1 to 9, characterized in that it further comprises detergent additives selected from inorganic salts and mixtures thereof. 11 Claims 1 to 10 further include fixedly bound abrasive particles.
Articles listed in any of the paragraphs. 12. characterized in that the moisture barrier consists of a hydrophobic material selected from hot melts, waxes, wax emulsions, polymer emulsions, silicones, silicone oils and silicone wax mixtures, natural and synthetic rubbers, resins and mixtures thereof. An article according to any one of claims 1 to 11. 13. Article according to any one of claims 1 to 12, characterized in that the moisture barrier consists of a hydrophilic material selected from polyvinyl alcohol, gelatin, starch and mixtures thereof. 14. An article according to any one of claims 1 to 13, characterized in that the moisture barrier covers 20 to 70% of the total area of each side of the absorbent substrate sheet. 15. Any one of claims 1 to 14, characterized in that the moisture barrier is applied as a decorative pattern such as parallel stripes, twill or check pattern, or letters on each side of the absorbent base sheet. Items listed. 16. Any one of claims 1 to 15, characterized in that the absorbent substrate consists of a first part impregnated with a detergent active compound and a second part substantially free of detergent active compounds. Articles listed in . 17. The article of claim 16, wherein the first portion is coated with a moisture barrier on both sides of the absorbent substrate sheet to form a sanderch that encapsulates the detergent active compound. 18. The article of claim 16 or 17, wherein the first portion defines regions of absorbent substrate separated from each other by a second portion.