EP3167788A1 - Cleaning item with an absorbent base material - Google Patents

Abstract

The invention relates to a cleaning article (100) having an absorbent base material formed by a flat material, having a first (102) and a second side surface, wherein on at least the first side surface (102) a coating (112) is provided, which first side surface (102) of the cleaning article (100) imparts an increased frictional force to an uncoated first side surface (102), characterized in that the coating (112) comprises a plurality of coating lines (114) and wherein the coating lines are a ratio of coating line width to coating line height of at least 2 and the coating line width is 0.2-1.5 mm and the coating line height is at most 0.8 mm.

Description

The invention relates to a cleaning article having an absorbent base material which is formed by a flat material, having a first and a second side surface, wherein on at least the first side surface, a coating is provided, the first side surface of the cleaning article a frictional force increased relative to the uncoated first side surface wherein the coating comprises a plurality of coating lines.

In the prior art, a variety of cleaning articles for cleaning surfaces, for. B. known for household cleaning.

For example, from the WO 03/104544 A1 a cleaning wiper with a sheet of nonwoven material and a structured coating order known, being provided as a coating pattern in particular discrete individual patterns.

Furthermore, from the WO 2004/106002 A1 a cleaning wiper is known, wherein the arrangement of the abrasive regions is preferably non-directional in order to ensure a good abrasion performance in each direction.

In addition, from the DE 25 36 440 an absorbent textile fabric is known, which consists of a nonwoven fabric and coated on both sides with binder surfaces, wherein a raised, squeegee-like pressure pattern of disjoint geometric figures is formed and in particular continuous channels or alleys of the printing pattern should be avoided.

Furthermore, from the DE 10 2004 039 517 B4 a cleaning cloth known with a formed as a print pattern surface coating having an abrasive agent, wherein areal patterns are provided.

Furthermore, from the EP 1 342 825 B1 a nonwoven fabric for cleaning cloths known with very fine fibers, wherein a binder application is provided.

Based on this prior art, it is the object of the present invention to provide a cleaning article which provides a good abrasive action against adhering dirt of the surfaces to be cleaned while at the same time providing sufficient absorption capacity for the components to be removed.

Under a cleaning article in the context of the invention, in particular cleaning wipes for surface cleaning, for example, for household purposes, especially for cleaning dishes, but also for surface cleaning, preferably in the kitchen or sanitary area, as well as for window cleaning etc.

The invention achieves this object by a cleaning article having the feature of claim 1, wherein the coating lines have a ratio of coating line width to coating line height of at least 2 and wherein the coating line width is 0.2 to 1.5 mm and the coating line height is 0.8 mm at most ,

In this way, comparatively thin, fine coating lines can be provided, which promise better abrasion than broader lines or areal patterns, which tend to "slip away" over the soils to be ablated.

Such fine lines can preferably be converted by gravure printing. In principle, however, other methods, such as screen printing process conceivable.

Particularly preferably, the coating lines have a ratio of coating line width to coating line height of 2-15, in particular 2-10 and more particularly 2-6.

The line width of the coating line is in particular at least 0.3 mm, more particularly at least 0.4 mm, more particularly at least 0.5 mm and more particularly at least 0.6 mm. The line width in particular, the coating lines is at most 1.2 mm, more particularly at most 1.0 mm, more particularly at most 0.8 mm.

The length of the coating line in relation to the line width should in particular be at least 5 times, preferably at least 6 times, more preferably at least 8 times and more preferably at least 10 times the line width.

The height of the coating lines and optionally provided further coatings should in particular be at least 0.1 mm, more particularly at least 0.2 mm. In this case, the height of the coating line should in particular be at most 0.6 mm, more particularly at most 0.5 mm and more particularly at most 0.4 mm.

The measurement of the height of the coating can be determined with a microscope with a corresponding magnification, namely as the difference between an averaged top surface of the base material and the upper edge of the coating line or other coatings.

With these preferred heights of the coating lines and any other coatings provided, a good abrasive effect can be achieved while still maintaining contact between the uncoated absorbent areas of the first side surface and the surface to be cleaned. In addition, advantageously unpleasant, tactile haptic effects are avoided.

Preferably, the entire coating is raised above the upper surface of the base material.

The coating of the cleaning article comprises coating lines. A full-surface coating of the cleaning article in the sense of a continuous, nationwide uninterrupted order is not provided. In addition to the coating in the form of coating lines, however, it is also possible to provide partial areal coatings or punctiform coatings. Exclusively flat or exclusively homogeneously distributed punctiform coatings are therefore not according to the invention.

Particularly preferably, the coating of the cleaning article consists entirely of coating lines.

In principle, the line-shaped coatings can have both straight lines and lines deviating from a straight course, such as curved lines, wavy lines, zigzag lines, as well as intersecting straight lines or also deviating from a straight course, such as curved, wave-shaped, zigzag-shaped lines. The lines can basically be designed as both continuous and interrupted, provided that the line as such remains clearly recognizable. D. h., It is also conceivable dashed, dash-dotted or dotted coating lines in the context of the present invention. In particular, the interrupted points shall not be longer than ten times, in particular not more than eight times, in particular not more than six times, in particular not more than four times the line width of this interrupted point.

Particularly preferably, it can be provided that the coating has a weight per unit area of 5 to 50 g / m ² , preferably 5 to 40 g / m ² , more preferably 5 to 25 g / m ² . This is intended to cover both coating lines and, if appropriate, additionally provided planar or punctiform coatings. With such a weight per unit area, sufficiently uncoated areas of the base material can advantageously be available as absorption surfaces at the same time, despite coating, for a good abrasion effect.

Further preferably, the base material has a basis weight of at most 150 g / m ² . In particular, the weight per unit area of the base material is at most 130 g / m ² , more particularly at most 100 g / m ² , more particularly at most 80 g / m ² , more particularly at least 30 g / m ² , furthermore especially at least 40 g / m ² . That is, the base materials for the cleaning articles in question are preferably comparatively thin, cloth-like materials. With lower basis weights of the base material, cleaning articles with good handling and drapability, ie with good adaptability to the contours of the surface to be cleaned, can advantageously be provided.

The determination of the basis weight refers to the dry state of the base material.

Particularly advantageous results in a ratio of the basis weights of coating to base material of 0.04 to 0.6 and in particular 0.1 to 0.4. By this adjustment of the basis weight can advantageously achieved a sufficient stabilization of the relatively thin base material by the coating order be so that the coating order in addition to the abrasion also contributes to a better handling of the cleaning article.

In this case, an increase in the strengths of the base material, in particular for relatively light materials, ie base materials of low basis weight, both in the machine direction and in the transverse direction is desired.

According to a further preferred embodiment it can be provided that, if over the first side surface of the cleaning article an imaginary grid of parallel, equidistant, perpendicular lines with an edge length of 20 mm of each lattice square is laid, the first side surface has no lattice square, the is coating-free. This ensures that over the entire cleaning article equally a good cleaning effect can be provided.

In this case, by lattice network of parallel, equidistant, mutually perpendicular lines such an arrangement of lines to be understood, in which a family of parallel, equidistant lines is cut by a second family of parallel, equidistant lines to form right angles. In the resulting grid, to which the cleaning article is arbitrarily placed, ie there is no preferred direction of the grid provided, then all grid squares should have a coating, in particular have a coverage of coating. By definition, only such grid squares are to be used for the determination, which lie completely in the area of the cleaning article. Grid squares cut by the edge line (edge) of the cleaning article are left out of consideration for the evaluation of the grid squares to be considered.

In this case, the degree of coverage of the area covered by the coating within a lattice square is understood to mean the area of the lattice square.

If appropriate, further coatings deviating from the line-like coatings should also be taken into account in the determination of the degree of coverage according to the invention. In other words, the respective degrees of coverage result from the coatings arranged in the respective grid squares, regardless of their design.

In particular, all lattice squares should have a degree of coverage of coating of at least 5%, in particular at least 8%, more particularly at least 10%, further in particular at most 45%, further in particular at most 40%, further in particular at most 35%, whereby also non-linear coatings counted become. The degrees of coverage contribute advantageously both to the cleaning effect and to the strength of the cleaning article or of the base material.

It is particularly preferred that in at least one direction, in particular in the machine direction and / or in the transverse direction, in particular in any direction of the cleaning article, in particular the base material, the distance of a coating line to at least one adjacent coating line not more than 20 mm, preferably at most 15 mm, more preferably at most 10 mm.

Under machine direction, also abbreviated as MD, while the direction is understood, which corresponds to the transport direction in the manufacture of the cleaning article, in particular the production of the base material of the cleaning article. The transverse direction, also abbreviated as CD, is therefore the direction perpendicular thereto.

When dimensioning the distance between two adjacent coating lines, a radius of at most 20 mm, preferably at most 15 mm, preferably at most 10 mm, is considered around any point of the coating line. The distance is in this case measured from one edge of the coating line to the nearest edge of the adjacent coating line.

The fact that a plurality of thin coating lines are arranged at a small distance, it is achieved that a multiple attacking of the coating lines can be carried out as an abrasive agent and thus a better abrasion effect can be achieved than in a flat application. This results in cleaning and Abriebeigenschaften with less effort, which is achieved in particular by the large number of thin lines that the risk of sticking to the product can be reduced. It is therefore equally preferable for further improving these properties that at least five interfaces of arbitrary coating lines are present on an area of 25 cm ² , represented as the area of 5 × 5 cm, of the cleaning article. In other words, in an area of 25 cm ² , the coating lines should preferably be cut, touched or tangent five times with further coating lines. In this way, a solidification of the cleaning article, especially in Transverse direction of the base material can be further improved. In addition, interfaces also represent points of attack for the cleaning effect.

Particularly preferred is a coating in the embodiment that at least 50%, in particular at least 75%, especially at 100% of the grid squares of 20 mm edge length at least one interface, in particular at least 2, more particularly at least 3, more particularly at most 30, on in particular at most 25, more particularly at most 20 interfaces are present.

Interfaces are understood as any contact areas or points of contact of at least two coating lines.

In order to improve the stability and strength of the cleaning article, in particular for base materials of lower basis weights, it may moreover be provided in particular that a continuous structure of coating lines in the course of the coating of a side edge of the cleaning article at least in sections, especially over the entire cleaning article is present to the opposite side edge.

Particularly with a view to improving the stability and strength in the transverse direction of the cleaning article, the coating lines are arranged in particular such that there are no interruptions between the coating lines at least in sections in the transverse direction of the cleaning article, in particular of the base material. By this it is to be understood that when one follows a coating line which is on one side edge, which is in particular a machine edge (MD) side edge, one begins either by following this coating line or by changing from one coating line to another At touching or crossing points or areas, ie at interfaces of the coating lines, without having to overcome a coating line-free area, the other side edge, which also runs in particular in the machine direction, passes. In this way, the two side edges, which extend in particular in the machine direction, are joined together by the coating lines, which form a coherent structure, in particular in the transverse direction, and thus, in particular, a stabilization and an increase in strength are achieved, in particular in the transverse direction.

As edges or edges or side edges of the cleaning article all edges of the cleaning article as well as limitations thereof are understood. In particular, at least one coating line, in particular a plurality of coating lines, in particular all the coating lines are applied continuously from one side edge to the opposite side edge running on the first side surface of the cleaning article. Preferably, continuity of coating lines is also given in the directions deviating therefrom. In particular, the coating can be formed with one or more continuous, in particular continuous, continuous coating lines running continuously from a first edge of the first side surface to an opposite second edge of the first side surface. Particularly advantageous are contiguous arrangements of intersecting coating lines, such as grid, diamond or honeycomb patterns.

In addition, it can be provided that the coating has a plurality of individual patterns or is formed therefrom. The individual patterns have, in particular, coating lines or in particular are formed from coating lines. In this case, individual patterns are to be understood as those patterns which are designed as open or closed patterns. Open patterns are those patterns in which the beginning of the line has no contact with the line end, and closed patterns are those in which the beginning and end of a line can no longer be determined, since these are connected to one another. Moreover, only those patterns should be single patterns according to the invention, which can not be reduced to a simple point. That is, a single pattern must be more than one dot, and single patterns are preferably those in which the coating line does not extend exclusively as a straight line in only one vector direction but in which the line pattern has bends and / or kinks.

Single patterns are those that are either completely separated from each other, or individual patterns that can also touch, cut and / or overlap. In spite of tangling, cutting and / or overlapping, the individual pattern can still be recognized as a single pattern from its areal extent defined by the direction predetermined by the coating line.

Individual patterns are also understood to mean pattern groups, which in particular are composed of at least two identical and / or different pattern elements. In particular, arrangements as pattern groups understood, in which at least two pattern elements are arranged side by side and in contact, and / or in particular pattern groups in which a first pattern element at least partially, in particular completely surrounds or rotates a second or further pattern element, such as concentric arrangements, in particular on circles, Oval or triangular or other polygons, or even interlocking geometric figures of any kind that touch each other in a point or line section. The coating may also comprise combinations of such pattern groups.

It is understood that the individual patterns formed in particular from coating lines are only partially or at least partially, preferably completely, surrounded by an uncoated area and / or also comprise an uncoated area, and at least partially, preferably completely, circumscribe this uncoated area.

According to a particularly preferred embodiment it can be provided that at least one single pattern is formed on at least the first side surface such that for each direction in the surface of the cleaning article or for a curved cleaning article for each tangential direction of the cleaning article, a portion of this coating perpendicular thereto runs. That is, for any possible direction in the cleaning article, if the cleaning article is lying flat, there is a portion or region in the coating that is perpendicular to any direction in the plane. By designing the line-shaped coating with a curvature, a better distribution of the forces in different directions can be achieved. The abrasion effect for soiling can insofar be improved. According to a further particularly preferred embodiment, the portion may be punctiform, in which case an imaginary tangent applied at this point will always be perpendicular to a direction in the cleaning article. Particularly preferably, at least 20%, in particular at least 40%, in particular at least 50%, in particular at least 60%, in particular at least 80%, in particular 100% of the individual patterns have at least one section which extends perpendicular to an arbitrary direction of the pad surface. In particular, at least 20%, in particular at least 40%, in particular at least 50%, in particular at least 60%, in particular at least 80%, in particular 100% of the individual patterns, this at least one section is punctiform and an imaginary tangent applied thereto runs perpendicular to an arbitrary direction in the surface of the cleaning article.

The provided on the at least first side surface of the cleaning article linear coatings may have the same or different geometric shapes and in particular be configured in the same or different dimensions / dimensions.

In addition, at least one single pattern may preferably be formed as a pattern group comprising at least two pattern elements formed from coating lines. Particularly preferably, at least 20%, in particular at least 40%, in particular at least 50%, in particular at least 60%, in particular at least 80%, in particular 100% of the individual patterns are formed from a sample group. In particular, each individual pattern is constructed from a plurality of pattern elements. For example, the pattern group may consist of inner and outer pattern elements be constructed and / or to a total pattern of merging pattern elements or other pattern elements, the z. B. next to each other and are arranged touching, be constructed. Particularly preferably, the configuration of a pattern group may be provided, such that a pattern element of a single pattern at least partially, but in particular completely surrounds a second pattern element or further pattern elements. It should also be understood that under circulation that the lines touch each other at least in some areas or are formed to run in parallel with each other. In particular, the pattern group of a single pattern can be designed such that a first pattern element is assigned to a second pattern element or further pattern elements next to one another and is arranged touching. Combinations of sample groups are also conceivable. Overall, the cleaning power and abrasive effect can be further improved by sample groups. In addition, sample groups are conducive to the stabilization of the base material. Depending on the desired degree of abrasive properties and optical and design wishes can be provided to apply the variety of coatings in a regular repeat or not regularly order.

It is provided in particular that the coating of the cleaning article and in particular the first side surface essentially comprises in its entire extent, so not only special areas, such as center or outer area of the cleaning article. It is therefore preferably provided that the coating extends over the entire at least first side surface of the cleaning article, wherein depending on the intended pattern individual areas of the cleaning article, such as the middle or edge area, with respect to the Pattern density can vary within the scope of the present invention. It is also conceivable to apply different patterns in some areas of the cleaning article than in other areas. Thus, for example, another coating may be provided in the middle region than in the edge region.

Furthermore, it can be provided that the coating can be provided distributed uniformly or non-uniformly over the surface of the cleaning article. Preferably, only the first side surface is coated. According to another embodiment, however, both side surfaces may be coated.

The cleaning article may particularly preferably have a degree of coverage by the coating based on the extent of the first side surface of at least 6%, in particular at least 8%, in particular at least 10%, more particularly at least 20% and in particular at most 50%, more preferably at most 40% and in particular more than 30%. In this way a good cleaning effect of the cleaning article is achieved and the desired properties of the base material, such as e.g. Absorption capabilities, not changed too much, but preserved.

If the coating on the cleaning article is a closed pattern, it can be provided that the individual patterns in total account for an area fraction of at least 10%, in particular at least 20%, more particularly at least 30%, more particularly at least 40% and in particular at most 80 %, more particularly at most 70%, more particularly at most 60%, more particularly at most 50% of the at least first side surface occupy.

The area of a single pattern is here understood to be the area enclosed by the outer coating lines (including the coating lines), thus also the inner uncoated areas of the single pattern or, when executed as a pattern group, the corresponding areas of the individual pattern elements are taken into account. If individual patterns have closed pattern areas, from which further, open, ie not self-contained, coating lines extend, these free adhering coating lines are not taken into account in the calculation of the area of the individual pattern. The surfaces covered by the single patterns can provide sufficient abrasive properties while maintaining the inherent properties of the base material, such as softness and absorption properties.

A single pattern preferably has an area with an extension distance between the outer coating lines of at least 0.3 cm, preferably at least 0.5 cm, more preferably at least 0.7 cm, more preferably at least 1.0 cm, more preferably at least 1.5 cm , more preferably at least 2 cm, more preferably at most 5 cm, more preferably at most 4 cm, further preferably at most 3 cm. As extension distance, the z. B. may be a diameter, it is understood the distance between each of the distal most distant coating lines that describe or limit a single pattern. It is measured at the outer edge of the coating line, ie including the line width.

In the case of closed individual samples, these include, including the circumscribing coating lines, preferably an area of at least 0.2 cm ² , more preferably of at least 0.5 cm ² , more preferably of at least 1.0 cm ² , more preferably of at least 1.5 cm ² , more preferably of at most 10.0 cm ² , more preferably at most 8.0 cm ² , more preferably at most 6.0 cm ² .

The coating features may be different or the same in terms of their geometric shape and / or their dimensions. In this case, the various properties of the cleaning article such as degree of coverage, frictional force, absorption properties can be taken into account and realized by adjusting the coating pattern.

Particularly preferred are coating patterns with curved or rounded areas, as they allow in use a better ergonomic adaptation to the surface to be cleaned and a more beautiful appearance.

The coating is in particular polymer-based. In particular, the coating based on a polymer is selected from the group comprising PE (polyethylene), PP (polypropylene), APAO (amorphous polyalphaolefins), EVA (ethylene-vinyl acetate), EVAC (ethylene-vinyl acetate copolymers), PA (polyamides), TPE-O ( Olefin-based thermoplastic elastomers), TPE-V (olefin-based crosslinked thermoplastic elastomers), TPE-E (thermoplastic copolyesters), TPE-U (urethane-based thermoplastic elastomers), TPE-A (thermoplastic copolyamides, eg PEBA), TPE-S ( Thermoplastic styrenic block copolymers) such as HSBC (hydrogenated styrene block copolymers), SEBS (styrene-ethylene-butadiene-styrene polymers), SBS (styrene-butadiene-styrene), SEPS (styrene-ethylene-propylene-styrene), ABS (acrylonitrile-butadiene-styrene) or a combination of one or more of said polymers thereof.

Preferably, the coating is homogeneous in its composition. Preferably, no abrasive particles are added to the coating.

As materials for the coating are preferably materials having a Shore A hardness of in particular at least 30, in particular of at least 40, in particular of at least 50, more particularly at least 60 and in particular of at most 95, more particularly of at most 90, more particularly at most 80, in particular more than 70 in question. The Shore A hardness represents a material characteristic value for elastomers and plastics. The Shore A hardness is determined here in accordance with the following method.

Method for determining Shore A hardness:

The Shore A hardness is a measure of the resistance of a material to the penetration of a body of a certain shape and under a defined spring force. In the case of the Shore hardness units, the value 0 indicates the smallest hardness and the value 100 indicates the highest hardness.

The measurement is based on the standards DIN 53505: 2000-08 and ISO 868: 2003 (E). A Shore A hardness tester is used. Such a hardness tester according to Shore A, which is shown schematically in FIG FIG. 6 60, uses a spring loaded indenter of the geometry of a truncated cone. The steel indenter 62 has a diameter D1 of 1.25 ± 0.15 mm, which is formed into a lower truncated cone with a bottom surface having a diameter D2 of 0.79 ± 0.01 mm with an inclination angle W of 35 ° ± 0.25 ° opens. The distance C between the lower edge of a presser foot 64 and the lower surface of the indenter is 2.5 ± 0.02 mm. The indentor is centered within the presser foot 64 with a recess having a diameter D3 of 3 ± 0.5 mm.

The test should be carried out on specimens not mechanically pre-stressed. For the test, the test piece should already be fully polymerized or vulcanized for 16 hours. The test is carried out under standard conditions at 23 ± 2 ° C and 50 ± 2% humidity. The specimens and equipment are conditioned for at least 1 hour.

The specimens need dimensions that allow for measurements at least 12 mm from each edge, and have a sufficiently plane-parallel bearing surface so that the pressure pad can contact the specimen on an area at least 6 mm in radius around the tip of the indenter. Specimens with a material thickness of at least 4 mm are required. At low thicknesses, the specimens may be composed of several thinner layers. Each specimen is measured at least 5 different points, with a distance of at least 12 mm from the edges of the specimen. The distance between the measuring points should be at least 6 mm. The pressing weight of the indenter is 1 kg.

The measuring time is 3 seconds, ie the hardness is read off 3 seconds after touching the bearing surface of the tester and the test specimen.

The coating lines are preferably applied by means of a roller which has an engraving corresponding to the pattern of the coating.

The first side surface with the coating may have a dynamic coefficient of friction measured on the basis of ASTM D 1894-01 of at least 0.2, in particular at least 0.3, more particularly at least 0.4, more particularly at least 0.5, with maximum values of in particular at most 1.0, more particularly at most 0.8, more particularly at most 0.6 are to be achieved. As a result, sufficient frictional forces and cleaning forces are generated without the cleaning article too easily slides over the surface to be cleaned. The amount of friction should be adjusted according to the purpose of cleaning. In particular, a coating with fine, hard lines is preferred.

Test for determining the dynamic sliding friction coefficient

In the present case, the sliding behavior and thus also the force behavior of cleaning articles according to the invention with coating should be determined. Here, the provided with the coating first side surface of the cleaning article is pulled against a standardized surface. The sliding friction force A occurring here is to be measured and from this the dynamic sliding friction coefficient can be determined. The test method is based on ASTM D 1894-01, for the determination of the friction behavior of plastic films.

The specimens shall be conditioned for a minimum of 2 hours in standard atmosphere at 23 ° C ± 2 ° C and 50% ± 2% humidity be. The samples must not be kinked, folded or scratched; other changes and contamination are to be avoided. The same applies to the steel test plate. The test method shall also be carried out under standard conditions (23 ° C ± 2 ° C, 50% ± 2%).

From the cleaning article with coating or from a corresponding roll product, a sample body of a dimension of 50 × 50 mm is punched out and fastened without creases on a friction pad. However, the roll goods are exactly the material from which the cleaning articles according to the invention are punched out or cut out.

The friction block has a base area of 63 mm x 63 mm edge length, so a contact base area of 40 cm ² and a mass of 200 g ± 5g. It is fastened by a thread (without self-expansion) to the load cell of a tensile testing machine according to DIN 51 221 Class 1. Such a tensile testing machine is the tester Zwick Roell type Z010 from Zwick GmbH & Co. KG, 89079 Ulm, Germany.

The additional device consisting of the sample table and friction block according to DIN EN ISO 8295: 2014 is also offered by Zwick. The friction pad with the specimen is carefully placed on a defined material, a smooth polished steel plate (DIN EN 1939: 2003-12). 15 seconds after placing the friction pad, the experiment is started. The test speed is 150 mm / min, both for the actual measuring path of 130 mm, as well as for the pre- and Nachmessweg of 10 mm. For determining the dynamic sliding friction coefficient p, only the force curve of the measuring path of 130 mm is used. The test will last for at least five specimens carried out. An average value x and the standard deviation s are rounded to two decimal places. The dynamic sliding friction coefficient is given by the quotient of the thus determined sliding friction force A expressed in grams (g) by the force exerted by the friction pad of 200 g.

The cleaning article may be formed with respect to the base material one or more layers and in particular comprise a fiber material, in particular a nonwoven material. The nonwoven materials preferably comprise cellulose-based fibers such as cotton or viscose, or synthetic fibers such as polyester, preferably polyester bicomponent fibers or polyester microfiber, polypropylene or blends thereof. In particular, the nonwoven material may be a nonwoven of continuous fibers or preferably a nonwoven of staple fibers. The base material preferably consists of staple fibers with a proportion of cellulose-based fibers of at least 20% by weight, in particular at least 30% by weight, more particularly at least 40% by weight, based on the mass of the base material. In a mixture, the remainder of the fiber material of the base material is preferably synthetic fibers. Synthetic fibers may preferably also comprise heat-fusible binding fibers for a possible thermal hardening of the base material, preferably at 10 -40% by weight, more particularly at 10 -30% by weight, based on the mass of the base material. Alternatively, an embodiment of the base material of 100% by weight of cellulose-based fibers is conceivable.

Nonwovens made of staple fibers are preferably needled nonwovens, water jet needled nonwovens or thermally bonded nonwovens.

The thickness of the cleaning article, including the coating on the first side surface or optionally of a coating on the second side surface, is preferably 0.3-2.5 mm, preferably 0.5-2 mm. The determination of the thickness of the cleaning article (including the coating) is carried out using a specific measuring pressure of 0.5 kPa on a probe surface of 25 cm ² . In particular, a thickness gauge DMT Schröder can be used. Incidentally, the thickness is determined on the basis of DIN EN ISO 9073-2: 1995.

In particular, the cleaning article has the coating according to the invention only on the first side surface. Thus, the second coating-free side surface of the cleaning article in further, the cleaning and frictional effect of the first side surface forward and / or downstream use acts are used.

Particularly preferably, the cleaning article has a coating on the first and second side surfaces. In particular, the cleaning article has the coating according to the invention on both side surfaces. Thus, the cleaning article can be used by the user for more intensive cleaning operations as well as easier, regardless of the orientation of the cleaning article.

The base material without coating, in particular water-jet needled spunlace or card webs, preferably has a strength or maximum tensile force in MD direction of 10 - 50N / 25mm and a strength or Maximum tensile force in CD direction of 5 - 30N / 25mm. The base material can be already compacted by solidification measures, such as, for example, by means of water-jet needling in the case of spunlace or carded nonwovens, or heat exposure to nonwovens having thermoplastic fibers.

In this case, an increase in the strengths of the base material, in particular for relatively lightweight materials, ie in particular for base materials having a basis weight of at most 150 g / m ² , preferably at most 130 g / m ² , both in the machine direction and in particular in the transverse direction desired.

The coating particularly advantageously contributes to increasing the strength of the base material. The cleaning article or the base material with the coating may have an increased strength compared to the base material without coating, wherein the strength in particular by at least 5%, more particularly at least 10%, more particularly at least 20%, more particularly at least 30%, is further increased in particular by at least 50%, at least in one direction, in particular preferably in the transverse direction (CD direction).

Preferably, the cleaning article having the coating has a longitudinal (machine direction) tensile strength of 15-80 N / 25mm, more preferably 15-70 N / 25mm, and a maximum transverse direction (cross-machine direction) tensile force of 10-50 N / 25mm, especially 10-40 N / 25mm.

• Diese Höchstzugkraft kann unter Verwendung einer genormten Zugprüfmaschine nach DIN 51221 ermittelt werden: Es werden aus dem zu prüfenden Reinigungsartikel, und zwar aus einem mittleren Bereich, Proben von einer Breite von 25 mm und einer Länge, die größer ist als die Einspannlänge, vorzugsweise von 200 mm, ausgestanzt. Dabei ist die jeweils zu prüfende Richtung des Reinigungsartikels, ob MD- oder CD-Richtung, zu berücksichtigen. Für die Prüfung werden die Probenstreifen lotrecht und spannungsfrei in den Klemmen der Zugprüfmaschine mit einer Einspannbreite von 25 mm und einer Einspannlänge (der Abstand zwischen den Klemmen) von 30 mm fixiert. Die derart eingespannten Proben werden dann mit einer Prüfgeschwindigkeit von 100 mm/min in der Ebene ihrer Erstreckung auseinanderbewegt und dabei wird die in dieser Richtung wirkende Zugkraft gemessen. Unter der Höchstzugkraft wird diejenige maximale Kraft verstanden, bei der der Reinigungsartikel bzw. der Probenstreifen zerreißt. Wenn zuvor höhere Kraftspitzen im Zuge der Dehnung gemessen werden, so stellen diese die Höchstzugkraft im Sinne dieser Prüfung dar. Man kann vorteilhafterweise bei Messungen der Längs-und der Querrichtung, welche der Maschinenrichtung bzw. der Richtung quer hierzu entspricht, verschiedene, insbesondere fünf Einzelmessungen vornehmen und deren Mittelwert berechnen. Die Angabe erfolgt in N/25mm.

The strength is determined here by the following test:

• This maximum tensile force can be determined using a standardized tensile testing machine according to DIN 51221: From the cleaning article to be tested, namely from a middle region, samples of a width of 25 mm and a length greater than the clamping length, preferably of 200, are obtained mm, punched out. The direction of the cleaning article to be tested, whether MD or CD direction, must be taken into account. For the test, the sample strips are fixed vertically and tension-free in the clamps of the tensile testing machine with a clamping width of 25 mm and a clamping length (the distance between the clamps) of 30 mm. The thus clamped samples are then moved at a test speed of 100 mm / min in the plane of their extension and thereby the tensile force acting in this direction is measured. By the maximum tensile force is meant the maximum force at which the cleaning article or the sample strip tears. If previously measured higher force peaks in the course of elongation, so these represent the maximum tensile force in the sense of this test. It can be advantageously in measurements of the longitudinal and transverse directions, which corresponds to the machine direction or the direction transverse thereto, different, in particular five individual measurements and calculate their mean. The indication is in N / 25mm.

The cleaning article is preferably used for cleaning hard surfaces. In particular, the cleaning article as a cleaning cloth, for example, for household purposes, especially as a cleaning cloth for dishwashing, but also for cleaning surfaces, preferably in the kitchen or sanitary area, as well as Washer can be used. The cleaning article is in particular a household cleaning cloth, a dishcloth, an oven or grill cleaning cloth, a floor wipe or a window cleaning cloth.

In addition, the cleaning article can also be used in the cosmetic sector, for cleaning the skin, in particular facial cleansing, in the embodiment of a cosmetic tissue, in particular as a peeling towel.

The cleaning article is preferably a disposable product. In principle, however, cleaning articles, e.g. conceivable in the household sector, which can be washed or cleaned.

In the present manner, a cleaning article can be provided which has particularly favorable properties in terms of abrasive property as well as absorption property.

Figur 1

eine Darstellung eines Ausschnitts einer ersten Seitenfläche eines erfindungsgemäßen Reinigungsartikels,

Figur 2

eine Darstellung eines Ausschnitts einer ersten Seitenfläche eines weiteren erfindungsgemäßen Reinigungsartikels,

Figur 3

eine Darstellung eines Ausschnitts einer ersten Seitenfläche eines weiteren erfindungsgemäßen Reinigungsartikels,

Figuren 4a - c)

verschiedene Einzelmuster und verschiedene Ausgestaltungen von Beschichtungslinien,

Figuren 5a - b)

eine Darstellung der Bestimmung der Gitterquadrate und

Figur 6

eine schematische, nicht maßstabsgetreue Darstellung eines Ausschnitts eines Shore-A Härtemessgeräts.

Further features and details and advantages of the invention will become apparent from the drawings and the following description of the cleaning article according to the invention. In the drawing show:

FIG. 1

a representation of a section of a first side surface of a cleaning article according to the invention,

FIG. 2

a representation of a section of a first side surface of another cleaning article according to the invention,

FIG. 3

a representation of a section of a first side surface of another cleaning article according to the invention,

FIGS. 4a-c)

various individual patterns and different designs of coating lines,

FIGS. 5a-b)

a representation of the determination of the grid squares and

FIG. 6

a schematic, not to scale representation of a section of a Shore A hardness meter.

FIG. 1 shows a plan view of a section of the first side surface 102 of a cleaning article 100 according to the invention, in the embodiment of a cloth for cleaning dishes, wherein the first side surface 102 faces the harness when used for cleaning dishes. The cleaning article 100 preferably consists of a base material of non-woven materials, and thereby of a mixture of cellulose-based fibers, such as cotton or viscose, and synthetic fibers, such as polyester or polypropylene.

The single-layer base material of the cleaning article has a base layer with a grammage of preferably at most 150 g / m ² , preferably from 40 to 80 g / m ² .

As FIG. 1 1, a coating 112 of coating lines 114 is provided on the first side surface 102 of the cleaning article 100. The coating 112 serves to remove food particles, etc. during dishwashing. The coating lines 114 are polymer-based. The material of the coating preferably has a Shore A hardness of 30-95. The coating lines are applied by gravure printing by means of an engraving process, wherein the cleaning article 100 is passed between a gravure roll having recesses laid therein with coating material and a counter roll. The width of the coating lines 114 in the present case is 0.5 to 0.7 mm. The height of the coating lines is preferably 0.2-0.3 mm, so that a good cleaning effect is achieved by the large number of narrow hard coating lines. The ratio of coating line width to coating line height is 2-4. The coating lines 114 run continuously from one side edge 122a to another side edge, not shown here, and in a continuous and intersecting arrangement including uncoated regions 116. The flocks of coating lines intersect in the interfaces 208. The coating lines are here in FIG Form of a diamond pattern arranged. The distance of a coating line to at least one adjacent coating line is at most 20 mm. In this case, a degree of coverage of coating lines on the first side surface of 20-40% is achieved.

There are different arrangements of the coating lines conceivable, as further exemplified in Figures 2 and 3 is shown. Figures 2 and 3 also show a plan view of a section of the first side surface 102 of a cleaning article 100 according to the invention. FIG. 2 shows an arrangement of coating lines 114, as well as in a contiguous and in the Interfaces 208 crossing arrangement of the coating lines, in the design of a diamond pattern of larger dimension.

In the FIG. 3 shown coating 112 has a plurality of individual patterns 120, which are formed by coating lines 114. In the case illustrated, each individual pattern 120 is preferably formed by pattern groups 124, the pattern groups here consisting of at least 3 pattern elements 126, in this case concentrically arranged circles, and no coating composition is applied between the individual pattern elements 126 of each individual pattern group forming a single pattern uncoated area 116 is present. In this way, a coverage on the first side surface of about 20-30% is achieved by the coating lines 114 in total. By virtue of the individual elements 120 as such, a total area coverage of 60-70% of the first side area 102 is obtained, that is, the free areas outside the individual patterns 120, ie the outer uncoated areas 118 surrounding the individual patterns take about 30-40% of the area first side surface 102. In this case, the distance of a coating line to at least one adjacent coating line is at most 20 mm, more particularly at most 15 mm. The coating lines have a line width of 0.5-0.7 mm and a line height of 0.2-0.3 mm. In this way, by the plurality of fine lines, also with a small distance from each other, the abrasion force of the cleaning article 100 to z. B. dishes are designed in an advantageous manner.

In addition, a coating in which the individual patterns 120 can intersect, overlap, or tangent, and wherein each individual pattern recognizes itself remains, as in FIG. 3 or FIG. 5 is exemplified, but the individual patterns merge into each other, that from one side edge 122a of the cleaning article to an opposite side edge 122b of the cleaning article at least partially the coating lines 114 are arranged so that no interruptions between the patterns occur, the advantage that on the one hand no preferred directions consist. On the other hand, however, this also the strengths of the cleaning article or the base material, in that direction advantageously improved. In particular, the continuity of coating lines, in particular in the transverse direction 212 of the cleaning article 100 or of the base material, that is to say the direction perpendicular to the production and machine direction 210 of the base material, is particularly advantageous.

The at least partially coherent structure of coating lines (114) in the course of the coating from one side 122a to the other side 122b is shown by way of example in FIG FIG. 5b whose pattern is that of FIG. 3 corresponds schematically represented by means of an imaginary line drawn in bold.

A coherent structure of coating lines is also in the FIGS. 1 and 2 shown.

As edges of the cleaning article 100, two opposing edges of the cleaning article 100 are considered. In this way, the abrasive properties and the stability and thus also durability of the cleaning article can be improved in the respective direction.

Particularly preferred is a coating in which at least one due to the configuration of the individual pattern 120 Single pattern 120, preferably at least 20% of the individual pattern 120 of the first side surface, particularly preferably each individual pattern 120, a portion or area 128 which is perpendicular, ie with an angle 132 of 90 ° to any direction 130 in the surface of the cleaning article 100th runs, as in FIG. 4a is shown schematically. In this way, a proportion can be opposed to each direction, which runs perpendicular thereto and thus has the optimum abrasion effect for this direction of movement.

Other single patterns show the FIGS. 4a-4c , where both different single patterns can be combined with each other, as the Figures 4a-4b In addition, the individual patterns with regard to the formation of the coating lines, both in terms of their height and in terms of their width, may have a difference. In addition, it is also conceivable not continuously continuous, but interrupted, as dashed, dot-dashed or dotted lines, as for example in FIG. 4a is shown, unless this leads to the resolution of the overall pattern such that the patterns can not be recognized as such. The individual patterns 120 constructed from coating lines can also consist entirely of coating lines which are composed of a continuity at points, as exemplarily in FIG Figure 4c is shown.

If a single pattern 120 is composed as a pattern group 124 of a plurality of pattern elements 126, these can, as in FIGS. 4a and 4b represented, fully circulate each other at a distance, but also rotate around each other so that there are points of contact. Moreover, it is also possible that the individual pattern elements of a single pattern 120 to form touch or Cutting areas are arranged, as for example Figure 4c shows. Also the single patterns according to the FIGS. 4a to 4c can be analogous to FIG. 3 be formed so that the individual patterns intersect, tangent or overlap.

The dynamic friction coefficient of the coated side surface of the cleaning article after FIGS. 1 . 2 or 3 measured in accordance with ASTM D 1894-01 is 0.4 - 0.7.

In the embodiment of a cleaning article having a base material (nonwoven material) of 30% by weight of viscose and 70% by weight of polyester and having a basis weight of 50 g / m ² , the uncoated base material has a machine direction strength of 40-50 N / 25mm and in Transverse direction 5 - 10 N / 25 mm. With a coating of coating lines according to FIG. 1 and a coating coverage of 20g / m ² , the cleaning article has a machine direction strength of 65-80 N / 25mm and in the transverse direction 10 -15 N / 25mm.

• Figur 5a zeigt beispielhaft einen Ausschnitt eines Reinigungsartikels 100 von rechteckiger Dimension mit der Aufsicht auf die erste Seitenfläche mit einer über die gesamte Erstreckung der ersten Seitenfläche verteilten Beschichtung 112, wie bereits in Figur 2 gezeigt, und ein darauf aufgelegtes imaginäres Gitternetz 200.

To measure the distribution of the degrees of coverage on the first side surface of a cleaning article, an imaginary grid is used. The determination is based on the FIGS. 5a-b explained in more detail:

• FIG. 5a shows by way of example a section of a cleaning article 100 of rectangular dimension with the view of the first side surface with a distributed over the entire extent of the first side surface coating 112, as already in FIG. 2 and an imaginary grid 200 placed thereon.

The imaginary grid 200, formed from an array of lines, wherein a first family 202 of parallel equidistant lines is intersected by a second family 204 of parallel, equidistant lines to form right angles, consists of grid squares 206, each having an edge length of 20 mm. The grid 200 may be placed over a cleaning article and its coating 112 in any manner. The individual grid squares 206 and the degree of coverage present therein are determined. True, is in FIG. 5a the grid 200 is provided with the lines of lines at an angle of 45 ° to the edge 122 in the case of a rectangular cleaning article, however, for the design no preferred direction for applying the grid is being considered. For the evaluation of the degree of coverage of the coating with respect to the respective grid squares, arbitrary evaluation methods, eg computer-aided graphics and drawing programs can be used. In the evaluation only grid squares are used for the determination, which lie completely in the area of the cleaning article. Lattice squares intersected by the edge line (edge) 122 of the cleaning article 100 remain for the evaluation of the coverage per lattice square. As in FIG. 5a can be seen, each lattice square on a coating. There is no grid square 206 that is coating free. In particular, each lattice square used for the evaluation has a coating coverage of 5-15%.

In the case of a cleaning article 100, moreover, it may be advantageous to provide at least five interfaces between any given coating lines per 25 cm ² . The maximum distance from one Coating line to at least one adjacent coating line is at most 20 mm. In particular, at least one interface 208, in particular 1-3 interfaces 208 are present per grid square 206 of 20 mm edge length, as shown schematically and by way of example in FIG FIG. 5a is indicated. This form of evaluation can be performed on any cleaning articles regardless of their dimensions and geometric shape, such as round, oval, square or any other shape, or regardless of the design of the coating. So shows FIG. 5b exemplifies the evaluation of the coating FIG. 3 , In this case, a degree of coverage of the grid squares 206 of 20 mm edge length of an average of 20-35% can be seen. The number of interfaces 208 of the coating lines of the tangent individual patterns is between 1 and 4 per grid square.

Claims (18)

A cleaning article (100) having an absorbent base material formed by a sheet having a first (102) and a second side surface, on at least the first side surface (102) being provided a coating (112) facing the first side surface (102 ) of the cleaning article (100) imparts increased frictional force to an uncoated first side surface (102), characterized in that the coating (112) comprises a plurality of coating lines (114) and wherein the coating lines have a ratio of coating line width to coating line height of at least 2 and the coating line width is 0.2-1.5 mm and the coating line height is at most 0.8 mm. Cleaning article according to claim 1, characterized in that the ratio is 2-15, in particular 2-10, more particularly 2-6. Cleaning article according to claim 1 or 2, characterized in that the coating (112) has a basis weight of 5-50 g / m ² , in particular 5-40 g / m ² , more particularly 5-25 g / m ² . Cleaning article according to one of the preceding claims, characterized in that the base material has a basis weight of at most 150 g / m ² , in particular at most 130 g / m ^2, in particular at most 100 g / m ² , more particularly at most 80 g / m ² , more particularly at least 30 g / m ² , more particularly at least 40 g / m ² . Cleaning article according to one of the preceding claims, characterized in that, if over the first side surface (102) of the cleaning article (100) an imaginary grid (200) of parallel, equidistant, perpendicular lines with an edge length of 20 mm of each grid square (206 ), the first side surface (102) has no lattice square that is free of coatings, and in particular that all lattice squares (206) have a coverage of coating of at least 5%, in particular at least 8%, more particularly at least 10%, more particularly at most 45 %, more particularly not more than 40%, more particularly not more than 35%. Cleaning article according to one of the preceding claims, characterized in that in at least one direction, in particular in the machine direction (210) and / or in the transverse direction (212), in particular in any direction, the distance of a coating line (114) to at least one adjacent coating line ( 114) is at most 20 mm, preferably at most 15 mm, more preferably at most 10 mm. Cleaning article according to one of the preceding claims, characterized in that on an area of 25 cm ² at least 5 interfaces (208) of any coating lines (114) are present. Cleaning article according to one of the preceding claims 5 - 7, characterized in that at least 50%, in particular at least 75%, in particular 100% of the grid squares (206) at least one interface (208), in particular at least 2, more particularly at least 3, further, in particular, at most 30, more particularly at most 25, more particularly at most 20 interfaces (208) are present. Cleaning article according to one of the preceding claims, characterized in that at least in sections, in particular continuously a coherent structure of coating lines (114) in the course of the coating (112) from a side edge (122a) of the cleaning article to the opposite side edge (122b) is present. Cleaning article according to claim 9, characterized in that the coating lines (114) are arranged so that at least in sections in the transverse direction (212) of the cleaning article, in particular the base material, no interruptions between the coating lines (114) exist. Cleaning article (100) according to any one of the preceding claims, characterized in that the coating (112) comprises a plurality of individual patterns (120), in particular from individual coating lines (114) formed individual patterns (120) or is formed therefrom. Cleaning article (100) according to claim 11, characterized in that at least one individual pattern (120) is formed as a pattern group (124), the at least two pattern elements (126) formed from coating lines (114). Cleaning article (100) according to claim 12, characterized in that a first pattern element (126) at least partially, in particular completely surrounds a second pattern element (126) or further pattern elements (126) and / or that a first pattern element (126) corresponds to a second pattern element (126). 126) or further pattern elements (126) associated side by side and is arranged touching. Cleaning article (100) according to one of the preceding claims, characterized in that the first side surface (102) has a coverage by the coating (112) of at least 6%, in particular at least 8%, in particular at least 10%, more particularly at least 20% and in particular of not more than 50%, more particularly not more than 40%, and more particularly not more than 30%. Cleaning article (100) according to one of the preceding claims, characterized in that the coating lines (114) are formed by continuous and / or at least partially interrupted lines, in particular dashed, dot-dashed, dotted, wherein the interruption no longer than 10 times, in particular, not more than 8 times, in particular not more than 6 times, in particular not more than 4 times, the line width of the line adjacent to this interrupted point. Cleaning article (100) according to one of the preceding claims, characterized in that the Coating (112) is polymer-based and in particular of materials having a Shore A hardness of at least 30, in particular at least 40, more preferably at least 50, more particularly at least 60, in particular of at most 95, more particularly at most 90, more preferably at most 80, further in particular at most 70 is formed. Cleaning article (100) according to one of the preceding claims, characterized in that the first side surface (102) with the coating (112) has a dynamic coefficient of friction based on ASTM D1894-01 of at least 0.2, in particular at least 0.3, in particular at least 0.4, more particularly at least 0.5, further in particular of at most 1.0, further in particular of at most 0.8, further in particular at most 0.6. Cleaning article (100) according to any one of the preceding claims, characterized in that it is used for cleaning hard surfaces, especially in the home, and in particular a cleaning cloth for dishwashing, surface cleaning, preferably in the kitchen or sanitary area, or cleaning cloth for cleaning windows ,

Images