MX2015006263A

MX2015006263A - Nonwoven sanitary tissue products comprising a woven surface pattern.

Info

Publication number: MX2015006263A
Application number: MX2015006263A
Authority: MX
Inventors: Emma Lynn Sartini; Andre Mellin
Original assignee: Procter & Gamble
Priority date: 2012-11-20
Filing date: 2013-11-04
Publication date: 2015-08-14
Also published as: EP2922997A1; WO2014081552A1; CA2891083A1; US20140138040A1

Abstract

Nonwoven sanitary tissue products having a woven surface pattern that provides the nonwoven sanitary tissue product with a woven appearance and a method for making such sanitary tissue products are provided.

Description

NON-WOVEN SANITARY PAPER PRODUCTS THAT INCLUDE A PATTERN OF SURFACE TISSUE FIELD OF THE INVENTION The present invention relates to nonwoven sanitary paper products and, more particularly, to sanitary paper products comprising a woven surface pattern and a method for manufacturing said sanitary paper products.

BACKGROUND OF THE INVENTION Consumers of nonwoven toilet paper products, particularly sanitary paper products such as toilet paper, facial tissue and paper towel, desire paper products that have the appearance and / or perform similar to woven fabrics such as bath towels, hand towels and the like. When a sanitary paper product has a greater appearance of fabric or cloth rags, consumers perceive the paper product as having physical properties such as softness, strength, cleaning capacity, absorbency and the like with greater similarity to those of a fabric. or cloth tissues. Generally, consumers want that toilet paper products do not have the appearance and / or performance similar to paper, but have the appearance and / or performance similar to a fabric or cloth tissues.

The formulators of sanitary paper products work, continuously, in imparting physical properties of softness, resistance, cleaning capacity, absorbency and the like in the sanitary paper products by modifying the composition of the products. paper products, the different conformation of paper products, the addition of additives to paper products and the different trade of paper products.

In addition, some formulators have tried to produce sanitary paper products that look more like rags and / or woven fabrics by imparting surface patterns, eg, patterned and / or wet-formed patterns, to sanitary paper products that have the purpose to give the appearance of a cloth or cloth tissues. One of the tools that formulators use is a repetitive design element. Many known surface patterns in sanitary paper products comprise repetitive design elements such as diamonds, squares, hexagons and other geometric figures made from dot engravings.

A known surface pattern used in sanitary paper products includes diamond and / or square wavy repeating design elements made from engravings of different points as shown in Figure 1. Such repetitive design elements do not connect with each other. , especially at the respective end.

As shown in Figures 2A and 2B, another known surface pattern uses bands formed from stitches, such as stitch prints, alone or in combination with bands formed from in-line elements in an attempt to produce a woven appearance in a sanitary paper product.

Another known surface pattern shown in Figure 3 comprises a screen-like network for imparting an appearance such as a net on a toilet paper product as shown in Figure 3.

Known surface patterns continue without adequately expressing a woven appearance to sanitary paper products. Consequently, consumers of sanitary paper products, especially sanitary paper products such as toilet paper, paper towel and / or facial tissues, still want toilet paper products that have the appearance of rags and / or woven fabrics and, thus, desire surface patterns in paper products sanitary ware that provide a woven appearance to sanitary paper products.

Accordingly, there is a need for a sanitary paper product comprising a novel surface pattern that imparts a woven product to a consumer of the sanitary paper product and, thereby, imparts softness, strength, fabric appearance and / or cleanliness. improved compared to other sanitary paper products comprising known surface patterns.

BRIEF DESCRIPTION OF THE INVENTION The present invention solves the need described above by providing a sanitary paper product comprising a surface pattern that communicates a woven product to a consumer of the sanitary paper product.

In one example of the present invention, there is provided a sanitary paper product comprising a surface pattern having a repetitive design element, wherein the repetitive design element contains two opposite open ends and two opposite closed ends, and wherein two or more of the repetitive design elements are connected to each other through respective opposing open ends.

In another example of the present invention, there is provided a method for manufacturing a sanitary paper product in accordance with the present invention, wherein the method comprises the step of: to. imparting a surface pattern comprising a repetitive design element, wherein the repetitive design element contains two opposite open ends and two opposite closed ends and wherein two or more of the repetitive design elements are connected to each other through the respective opposite open ends.

The present invention provides a sanitary paper product comprising a novel surface pattern that imparts a woven appearance to the sanitary paper product and a method for making it.

BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a top plan view of a surface pattern of the above material for a sanitary paper product; Figure 2A is a top plan view of another surface pattern of the above material for a sanitary paper product; Figure 2B is a top plan view of another surface pattern of the previous material for a sanitary paper product; Figure 3 is a top plan view of another surface pattern of the previous material for a sanitary paper product; Figure 4 is a schematic representation of an example of a design element in accordance with the present invention; Figure 5 is a schematic representation of another example of a design element in accordance with the present invention; Figure 6 is a schematic representation of an example of a repetitive design element of Figure 4 in accordance with the present invention; Figure 7 is a schematic representation of an example of a surface pattern comprising a repetitive design element of Figure 5 in accordance with the present invention; Figure 8 is a schematic representation of an example of a comparative surface pattern; Figure 9 is a schematic representation of an example of another comparative surface pattern; Figure 10 is a schematic representation of an example of another comparative surface pattern; Figure 11 is a schematic representation of an example of another comparative surface pattern; Figure 12 is a schematic representation of an example of another comparative surface pattern; Figure 13 is a schematic representation of an example of another comparative surface pattern; Figure 14 is a schematic representation of an example of a sanitary paper product having a surface pattern in accordance with the present invention; Y Figure 15 is a schematic representation of another example of a sanitary paper product having a surface pattern in accordance with the present invention.

DETAILED DESCRIPTION OF THE INVENTION Definitions "Sanitary paper product", as used in the present description, means a soft, low density web (i.e., < sanitary paper products approximately 0.15 g / cm3 measured at 1.4 kPa (95 g / inches2)) useful as an implement for cleaning after urination and defecation (toilet paper), for otorrinolaringological discharges (facial tissues) and multifunctional absorbent and cleaning uses (absorbent towels) and dry and wet tissues. The sanitary paper product may be wound several times on itself, around a core or without a core, to form a roll of toilet paper product. Alternatively, the sanitary paper product may be in the form of separate sheets. The sanitary paper product can be a through-air dried toilet paper product, a wet-pressed toilet paper product, a creped tissue paper product, a fabric creped toilet paper product, a crepe paper product, or a crepe paper product. a non-creped toilet paper product. In one example, the sanitary paper product may comprise two or more different sheets of a fibrous structure that is manufactured by different processes, for example, a sheet of fibrous structure dried with through-air and a sheet of fibrous structure creped into web.

The sanitary paper products and / or the fibrous structures of the present invention may exhibit a basis weight of greater than 15 g / m2 to about 120 g / m2 and / or from about 15 g / m2 to about 110 g / m2 and / or from about 20 g / m2 to about 100 g / m2 and / or from about 30 g / m2 to 90 g / m2. Additionally, the sanitary paper products and / or the fibrous structures of the present invention can exhibiting a basis weight of from about 40 g / m2 to about 120 g / m2 and / or from about 50 g / m2 to about 110 g / m2 and / or from about 55 g / m2 to about 105 g / m2 and / or from approximately 60 g / m2 to 100 g / m2.

The sanitary paper products of the present invention may exhibit a density (measured at 1.4 kPa (95 g / in2)) less than about 0.60 g / cm3 and / or less than about 0.30 g / cm3 and / or less than about 0. 20 g / cm3 and / or less than about 0.10 g / cm3 and / or less than about 0.07 g / cm3 and / or less than about 0.05 g / cm3 and / or from about 0.01 g / cm3 to about 0.20 g / cm3 and / or from about 0.02 g / cm3 to about 0.10 g / cm3.

The sanitary paper products of the present invention can be presented in the form of rolls of sanitary paper product. The rolls of sanitary paper product may comprise a plurality of connected, but perforated sheets of fibrous structure, which may be dispensed separately from the adjacent sheets.

The sanitary paper products of the present invention may comprise additives such as softening agents such as silicones and quaternary ammonium compounds, temporary wet strength agents, permanent wet strength agents, bulk softening agents, lotions, silicones, wetting agents , latex, especially, latex applied in pattern to the surface, dry strength agents such as carboxymethylcellulose and starch; and other types of additives suitable for inclusion in and / or on sanitary paper products.

"Fibrous structure", as used in the present description, refers to a structure comprising one or more filaments and / or fibers. In one example, a fibrous structure according to the present invention means an ordered arrangement of filaments and / or fibers within a structure to perform a function. Non-limiting examples of fibrous structures of the present invention include paper, fabrics (including woven, knitted and non-woven fabrics) and absorbent pads (eg, for diapers or feminine hygiene products).

Non-limiting examples of processes for manufacturing fibrous structures include known wet-laid papermaking processes, including rapid cloth transfer and / or creping and / or wet microcontraction and / or wet pressure papermaking processes and processes for making air-laid paper. Typically, such processes include the steps of preparing a fiber composition in the form of a suspension in a medium, either wet, more specifically, an aqueous medium, or dry, more specifically, gaseous, that is, with air as the medium . The aqueous medium used for wet laying processes is often mentioned as a mixture of fibers. The fiber mixture is then used to deposit a plurality of fibers on a forming wire or band in such a way that an embryonic fibrous structure is formed after which the fibers dry and / or cohere with each other to produce a fibrous structure. . Additional processing of the fibrous structure can be performed in such a way that a finished fibrous structure is formed. For example, in typical papermaking processes, the finished fibrous structure is the fibrous structure that is wound on the reel at the end of papermaking and can then be converted into a finished product, for example, a product of toilet paper.

The fibrous structures of the present invention can be homogeneous and can be stratified. If they are stratified, the fibrous structures may comprise at least two and / or at least three and / or at least four and / or at least five layers.

The fibrous structures of the present invention can be coformmed fibrous structures.

"Coformed fibrous structure", as used in the present description, means that the fibrous structure comprises a mixture of at least two different materials, wherein at least one of the materials comprises a filament, such as a polypropylene filament and at least another material, other than the first material, comprises a solid additive, such as a fiber and / or a particulate. In one example, a coformmed fibrous structure comprises solid additives, such as fibers, for example, wood pulp fibers and filaments, such as polypropylene filaments.

"Solid additive", as used in the present description, means a fiber and / or a particulate.

"Particulate", as used in the present description, means a granular substance or a powder.

"Fiber" and / or "filament", as used in the present description, means an elongate particulate having an apparent length that greatly exceeds its apparent width, i.e., a length to diameter ratio of at least about 10. In For example, a "fiber" is an elongated particulate, as described above, that exhibits a length of less than 5.08 cm (2 inches) and a "filament" is an elongate particulate, as described above, exhibiting a length greater than or equal to 5.08 cm (2 inches).

Typically, the fibers are considered discontinuous in nature. Non-limiting examples of fibers include wood pulp fibers and staple synthetic fibers, such as polyester fibers.

Typically, the filaments are considered continuous or of an almost continuous nature. The filaments are relatively longer than the fibers. The Non-limiting examples of filaments include meltblown and / or spunbond filaments. Non-limiting examples of spunbond materials include hydroxyl polymers, for example, natural polymers such as starch, starch derivatives, cellulose and cellulose derivatives, hemicellulose, hemicellulose derivatives and synthetic hydroxyl polymers including, but not limited to, are limited to, polyvinyl alcohol filaments and / or polyvinyl alcohol derived filaments, and thermoplastic polymer filaments, such as polyesters, nylon, polyolefins such as polypropylene filaments, polyethylene filaments and biodegradable or thermoplastic fibers that can be composted such as polylactic acid filaments, polyhydroxyalkanoate filaments and polycaprolactone filaments. The filaments may be monocomponent or multicomponent, such as bicomponent filaments.

In an example of the present invention, "fiber" refers to paper fibers. Papermaking fibers useful in the present invention include cellulosic fibers, known as wood pulp fibers. Some wood pulps useful in the present invention are chemical pulps, for example, Kraft, sulphite and sulfate pulps, as well as mechanical pulps including, for example, crushed wood, thermomechanical pulps and chemically modified thermomechanical pulps. However, chemical pulps may be preferred as they impart a superior tactile feel of softness to the sheets of fabric fabricated therefrom. Pulps derived from deciduous trees (hereinafter referred to as "hardwood") and conifers (hereinafter referred to as "softwood"). The hardwood and softwood fibers can be blended or alternatively deposited in layers to provide a stratified web. The US patent UU no. 4,300,981 and the US patent. UU no. 3,994,771 are incorporated herein by reference for the purpose of describing the stratification of hardwood and softwood fibers. In addition, fibers are applicable in the present invention derived from recycled paper that may contain any or all of the above categories as well as other non-fibrous materials, such as fillers and adhesives, used to facilitate the production of original paper. Non-limiting examples of suitable hardwood pulp fibers include eucalyptus and acacia. Non-limiting examples of suitable softwood pulp fibers include southern softwood kraft (SSK) and northern softwood kraft (NSK).

In addition to the various wood pulp fibers, other cellulosic fibers such as cotton, rayon, lyocell, bamboo and bagasse lintents can be used in the present invention. Other sources of cellulose in the form of fibers or that can be spun into fibers include pastures and grain sources.

In addition, in the fibrous structures of the present invention trichomes can be used, for example, from the "lamb ear" plants and seed hairs.

"Weight average molecular weight", as used in the present description, means the weight average molecular weight as determined by means of gel permeation chromatography according to the protocol found in the publication Colloids and Surfaces A. Physico Chemical & Engineering Aspects, Vol. 162, 2000, p. 107-121.

As used in the present description, "basis weight" is the weight per unit area of a sample indicated in pounds / 3000 ft2 or g / m2 and is measured in accordance with the base weight test method described in the present disclosure.

As used in the present invention, "gauge" means the macroscopic thickness of a fibrous structure. The gauge is measured according to the gauge test method described in the present description.

As used in the present description, "volume" is calculated as the caliper quotient, expressed in microns, divided by the basis weight, expressed in grams per square meter. The resulting volume is expressed in cubic centimeters per gram. For the products of this invention, the volumes may be greater than about 3 cm3 / g and / or greater than about 6 cm3 / g and / or greater than about 9 cm3 / g and / or greater than about 10.5 cm3 / g to about 30 cm3 / g / o up to approximately 20 cm3 / g. For the products of the present invention, the volumes referred to above are obtained from the base sheet, which is the sheet produced by means of the tissue paper machine without subsequent treatments, such as etching. However, the base sheets of the present invention can be etched to produce a larger volume or improved aesthetics, if desired, or they can be left without etching. In addition, the base sheets of the present invention can be calendered to improve uniformity or reduce bulk, if desired, or if necessary to meet product specifications.

"Density", as used in the present invention is calculated as the quotient of the basis weight expressed in grams per square meter divided by the caliber expressed in microns.

"Machine direction" or "MD", as used in the present description, means the direction parallel to the flow of the fibrous structure through the machine for manufacturing fibrous structures and / or equipment. of manufacture of sanitary paper products.

"Cross-machine direction" or "CD", as used in the present description, means the direction parallel to the width of the fibrous structure manufacturing machine and / or product manufacturing equipment. sanitary paper and perpendicular to the machine direction.

"Sheet", as used in the present description, means an individual integral fibrous structure.

"Sheets", as used in the present description, means two or more individual and integral fibrous structures arranged in a substantially contiguous face-to-face relationship that form a multiple-sheet health product. It is further contemplated that an individual and integral fibrous structure can effectively form a multi-sheet health paper product, for example, by bending over itself.

"Surface pattern", with respect to a nonwoven toilet paper product, especially a sanitary paper product in accordance with the present invention, means in the present invention a pattern that is present on at least one surface of the sanitary paper product. The surface pattern may be a textured surface pattern, such that the surface of the sanitary paper product comprises protrusions and / or depressions as part of the surface pattern. For example, the surface pattern may comprise etchings and / or wet formed texture. The surface pattern may be a non-textured surface pattern, such that the surface of the sanitary paper product does not comprise protrusions and / or depressions as part of the surface pattern. For example, the surface pattern may be printed on a surface of the toilet paper product.

"Design element", as used in the present description, means a different object present on a surface of a sanitary paper product. Non-limiting examples of design elements include representations of flowers, butterflies, animals and geometric shapes. In one example, the design element is a form that is formed by one or more elements in line. In another example, the design element is formed by two in-line elements as shown in Figures 4 and 5. In one example, the design element can be an engraved design element. In another example, the design element can be a wet formed element. In yet another example, the design element may have a portion that is record and another portion that is formed wet.

"Repetitive design element", as used in the present description, with respect to a surface pattern means a design element that repeats two or more, and / or a plurality of times within the surface pattern. In an example, two or more and / or greater than 15% and / or greater than 25% and / or greater than 50% and / or greater than 75% and / or 100% of the repetitive design elements are connected to the minus one adjacent design element within the surface pattern. In one example, the plurality of repetitive design elements covers more than 5% and / or more than 10% and / or more than 20% and / or more than 30% and / or more than 40% and / or more than 50 % and / or more than 60% and / or more than 70% and / or approximately 100% and / or approximately 90% and / or approximately 80% of the surface area of the sanitary paper product.

"Engraving", as used in the present description with respect to a sanitary paper product means a sanitary paper product that has been subjected to a process that converts a soft surface fibrous structure to a decorated surface by duplicating a design in one. or more engraving rolls, which form a grip line through which the fibrous structure passes. Engraving does not include creping, micro-creping, printing or other processes that can impart a texture and / or decorative pattern to a fibrous structure.

"Inline element", as used in the present description, means a continuous line having an aspect ratio greater than 1.5: 1 and / or greater than 1.75: 1 and / or greater than 2: 1 and / or greater than 5: 1 In one example, the in-line element has a length of at least 2 mm and / or at least 4 mm and / or at least 6 mm and / or at least 1 cm to approximately 10.16 cm and / or approximately 8 cm and / or approximately 6 cm and / or approximately 4 cm.

The solid lines and / or dashed lines of the filament pattern and / or The filament line pattern of the present invention can be formed by line engraving or line engraving. In one example, the solid lines and / or dashed lines of the filament pattern and / or in-line pattern of filaments of the present invention may be formed by lines that are formed by wet molding and / or a cloth dried with air through and / or a printed cloth dried with passing air.

"Point element", as used in the present description, means a point that exhibits an aspect ratio of approximately 1: 1. Non-limiting examples of dot elements are recorded so that they are formed as circles, squares, rectangles (dashes) and / or triangles. In one example, one or more repetitive design elements may comprise one or more points.

"Water resistant", as it refers to a surface pattern or part of it means that a pattern retains its structure and / or integrity after being saturated by water and the pattern is still visible to a consumer. In one example, the solid lines and / or dashed lines of the filamentous and / or filamentary line pattern may be water resistant.

Repetitive design element In one example, the repetitive design element 10a of the present invention comprises a geometric shape as shown in Figure 4. The geometric shape is created by two or more inline elements 12 which are associated with each other to define the geometric shape. The repetitive design element 10a comprises four ends 14 comprising two opposite open ends 16 and two opposite closed ends 18.

In another example, the repetitive design element 10b of the present invention it comprises a geometric shape as shown in Figure 5. The geometric shape is created by two or more inline elements 12 that are associated with each other to define the geometric shape. The repetitive design element 10b comprises four ends 14 comprising two opposite open ends 16 and two opposite closed ends 18.

Surface pattern The surface pattern of the present invention comprises two or more and / or a plurality of repetitive design elements.

In one example, the surface pattern 20a comprises a plurality of repetitive design elements 10a as shown in Figure 6. As shown in FIG.

Figure 6, two or more repetitive designs 10a are connected to each other through their respective opposite open ends 16 as represented by the letter "O", which forms a channel 22a between the connected repeating design elements 10a. This channel 22a is included between two opposite closed ends 18 as represented by the letter "C" of two adjacent repetitive design elements 10a. This arrangement of the opposite connected open ends 16 of the repetitive design elements 10a that are included between the opposite closed ends 18 of the repetitive design elements 10a gives the appearance of a woven surface pattern and / or fabric and / or woven cloth .

In another example of the present invention, the surface pattern 20b comprises a plurality of repetitive design elements 10b as shown in FIG.

Figure 7. As shown in Figure 7, two or more repetitive designs 10b are connected to each other through their respective opposite open ends 16 as represented by the letter "O", which forms a channel 22b between the design elements repetitive connected 10b. This channel 22b is included between two opposite closed ends 18 as represented by the letter "C" of two repetitive design elements. adjacent 10b. This arrangement of the connected opposing open ends 16 of the repetitive design elements 10b that are included between the opposite closed ends 18 of the repetitive design elements 10b provides the appearance of a woven surface pattern and / or fabric and / or woven cloth .

In one example, the opposite closed ends 18 that include the channel 22a, 22b formed between the respective opposite open ends 16 share at least a portion of a common line element of the channel 22a, 22b so that the line element forming at least part of the channel 22a, 22b further defines part of the closed ends 18.

As is evident from the comparative surface patterns shown in Figures 8 to 13, which lack the arrangement of the opposite connected open ends of repetitive design elements that are included between the opposite closed ends of repetitive design elements of the present invention, a woven arrangement is not achieved by arranging the open and closed ends as represented by the letters "O" and "C", respectively, of its repetitive design elements.

Further, as is evident from the comparative surface patterns shown in Figures 12 and 13, which lack the arrangement of the opposite connected open ends of repetitive design elements that are included between the opposite closed ends of repetitive design elements of the present invention since the opposite open ends do not connect to each other in the surface pattern, a woven appearance is not achieved by the open and closed ends arrangements as represented by the letters "O" and "C", respectively , of its repetitive design elements.

Sanitary paper product As shown in Figure 14, an example of a sanitary paper product 30 of the present invention comprises a surface 32 that exhibits a machine direction and a machine-transverse direction. The surface 32 having a surface pattern 20c comprises a repetitive design element 10c. The repetitive design elements 10c are connected to each other through their respective opposite open ends 16, which form the channels 22c between the connected repeating design elements 10c. This channel 22c is included between two opposite closed ends 18 of two adjacent repetitive design elements 10c. This arrangement of the opposite connected open ends 16 of the repetitive design elements 10c that are included between the opposite closed ends 18 of the repetitive design elements 10c provides the appearance of a woven surface pattern and / or woven fabric and / or fabric.

In one example, as shown in Figure 14, one or more of the repetitive design elements 10c may comprise dot elements 34, such as point engravings.

In another example, as shown in Figure 14, the surface pattern 20c may further comprise another design element, such as a background design element 36, for example, inline elements 38 that are located between one or more adjacent repetitive design elements 10c.

Figure 15 illustrates another example of a sanitary paper product 30 with a surface pattern 20d, comprising a surface 32 exhibiting a machine direction and a cross machine direction. The surface 32 having a surface pattern 20d comprises a repetitive design element 10d. The repetitive design elements 10d are connected to each other through their respective opposite open ends 16, which form channels 22d between the connected repeating design elements 10c. East channel 22d is included between two opposite closed ends 18 of two adjacent repetitive design elements 10d. This arrangement of the connected opposing open ends 16 of the repetitive design elements 10d included between opposite closed ends 18 of repetitive design elements 10d provides the appearance of a woven surface pattern and / or woven fabric and / or fabric.

In another example, as shown in Figure 15, the surface pattern 20d may further comprise another design element, such as a bottom design element 36, for example, inline elements 38 that are located between one or more adjacent repetitive design elements 10d.

As shown in Figures 14 and 15, the elements of repetitive design 10c and 10d, respectively, are oriented with their surface patterns 20c and 20d, respectively, so that their respective opposite closed ends 18 include channels 22c and 22d, respectively, formed by their respective opposed opposite ends connected 16. In one example , as shown in Figure 15, the channel 22d is oriented in the machine direction of the sanitary paper product, for example, parallel to the machine direction. In another example, for example, as shown in Figure 14, the channel 22c is oriented at an angle with respect to the machine direction of the toilet paper product. In one example, the channel can be oriented at an angle of from about 10 ° to about 80 ° and / or from about 25 ° to about 65 ° and / or from about 35 ° to about 55 °.

Furthermore, as shown in Figures 14 and 15, the surface pattern may further comprise a background design element 36. The background design element 36 may comprise inline elements 38. In one example, the elements in line 38 can be oriented at an angle with respect to the machine direction of the toilet paper product from about 10 ° to about 80 ° and / or about 25 ° to about 65 ° and / or from about 35 ° to about 55 °.

In another example, the background design element 36 may comprise dot elements (not shown).

In one example, the background design element is wet formed. In another example, the background design element is formed dry. In yet another example, the background design element is recorded. In yet another example, the bottom elements comprise a portion that is formed wet and a portion that is formed dry. In yet another example, the bottom design element comprises a wet forming portion and a portion that is engraved.

In yet another example, the surface of a sanitary paper product of the present invention may comprise a micropattern, such as a wet formed micropattern and / or a patterned micropattern and / or a thermally bonded micropattern, which may substantially cover 100 % of the surface area of the surface. Typically, said micropattern is composed of dot elements and / or diamond elements that are a fraction of the size of the surface patterns. In another example, the micropattern comprises inline elements, such as parallel inline elements, for example, parallel straight line elements and / or parallel sinusoidal inline elements.

Any of the inline elements of the present invention may have a variable width along the length of the inline elements.

The surface pattern in the sanitary paper products of the present invention can be a pattern of etching imparted by passing a sanitary paper product through an engraving line comprising at least one pattern engraving roller patterned to impart a surface pattern according to the present invention and / or a water resistant pattern (i.e., wet textured pattern), such as a patterned air drying band having a pattern for imparting a surface pattern according to the present invention, and / or a surface pattern imparted by rapid transfer or creped or wet pressed cloth or portions thereof imparting texture to the sanitary paper product, typically, during the sanitary paper product manufacturing process.

In one example, the surface of the sanitary paper product comprises a surface pattern having texture. For example, a surface pattern comprising textured ribs and / or a rough texture to remove, assist in removing and / or displacing and / or being perceived as removing and / or displacing dirt, such as deposition and / or other solid and / or liquid excrement from the skin of a consumer, during a cleaning process by a consumer through the use of the sanitary paper product. In another example, the surface pattern may comprise a textured region (e.g., a "cleaning zone") such as textured ribs as described above and a non-textured region (e.g., an "open area"). absorbent ") to collect, assist in collecting and / or be perceived as collecting dirt such as deposition and / or other solids and / or liquid excrement from the skin of a consumer, during a cleaning process by a consumer through the consumer. use of the sanitary paper product. In another example, a portion of the non-textured region may be or may be perceived by consumers as subject and / or attached to another sheet of the sanitary paper product. In yet another example, the surface of the sanitary paper product of the present invention may comprise different elevations, especially with respect to the textured and non-textured regions. For example, the non-textured region may protrude from the surface of the sanitary paper product to a greater degree than the textured region. In other words, the repetitive design element of the surface pattern can protrude from the surface of the sanitary paper product in greater degree than any background design element (s) protruding from the surface. This difference in elevation can be real or it can be a perception of the consumers of the health paper product.

The sanitary paper products comprising a surface pattern of the present invention can be perceived by the consumers of the sanitary paper products as being able to provide better cleaning of dirt, especially deposition, compared to the sanitary paper products comprising patterns of sanitary paper. surface that are not within the scope of the present invention.

Methods for making sanitary paper products The sanitary paper products of the present invention can be manufactured by any suitable process known in the art. The method can be a process for making a sanitary paper product using a cylindrical dryer such as Yankee (a Yankee process), or it can be a non-Yankee process, as used to make toilet paper products with a practically uniform density and / or without creping.

The sanitary paper product of the present invention can be manufactured with the use of a molding member. A "modeling member" is a structural element that can be used as a support for an embryonic web comprising a plurality of cellulosic fibers and a plurality of synthetic fibers, as well as a forming unit for forming or "modeling" a desired microscopic geometry of the sanitary paper product of the present invention. The modeling member may include any element having liquid permeable areas and the ability to impart a microscopic three-dimensional pattern to the structure being fabricated therein and included in enunciative form, single-layer or multi-layer structures comprising a fixed plate, a conveyor belt, a woven fabric (including Jacquard-like patterns and similar woven patterns), a band, and a roller. In one example, the molding member is a deflection member. The molding member may comprise a surface pattern in accordance with the present invention that is imparted to the sanitary paper product during the manufacturing process of the sanitary paper product.

A "reinforcement element" is a desirable (but not necessary) element in some embodiments of the molding member, useful primarily to provide or facilitate the integrity, stability and durability of the molding member comprising, for example, a resinous material. The reinforcement element may be fluid permeable or partially fluid permeable, may have various interwoven patterns and patterns and may comprise various materials, such as, for example, a plurality of interwoven yarns (including Jacquard and woven patterns) similar), a felt, a plastic, another suitable synthetic material or any combination of these.

In an example of a method for making a sanitary paper product of the present invention, the method comprises the step of contacting an embryonic fibrous web with a deflection member (molding member), such that at least a portion of the embryonic fibrous web deviates out of the plane of another portion of the embryonic fibrous web. The phrase "out of plane," as used in the present description, means that the sanitary paper product comprises a protuberance such as a dome, or a cavity extending from the plane of the sanitary paper product. The molding member may comprise a through-air dried fabric comprising a resinous frame defining deflection conduits in the design of the desired surface pattern which allows portions of the fibrous structure to deflect into the ducts and, thus, form the design elements repetitive within the surface pattern of the sanitary paper products of the present invention. In addition, a forming wire, such as a porous member, may comprise a resinous frame defining deflection conduits in the design of the desired surface pattern which allows portions of the fibrous structure to deflect into the conduits and, thus, forming the repetitive design elements within the surface pattern of the sanitary paper products of the present invention.

In another example of a method for making a sanitary paper product of the present invention, the method comprises the steps of: (a) providing a fibrous supply comprising fibers; (b) depositing the fibrous supply on a porous member to form an embryonic fibrous web; (c) associating the embryonic fibrous web with a deflection member comprising a surface pattern; Y (d) drying said embryonic fibrous web, such that the surface pattern is imparted to the dried toilet paper product.

In another example of a method for making a sanitary paper product of the present invention, the method comprises the steps of: (a) provide a fibrous structure; Y (b) imparting the surface pattern to the fibrous structure to produce the sanitary paper product.

In yet another example, a method for making a sanitary paper product in accordance with the present invention; The method comprises the steps of: to. providing at least one sheet of a fibrous structure; and b. impart a surface pattern to the fibrous structure to produce the sanitary paper product, wherein the surface pattern has a repetitive design element, wherein the repetitive design element contains two opposite open ends and two opposite closed ends, and wherein two or more of the repetitive design elements are connected each other through the respective opposite open ends.

In still another example of the present invention, a method for making a sanitary paper product in accordance with the present invention; The method comprises the steps of: to. depositing fibrous elements on a patterned web to form a fibrous structure comprising a surface pattern having a repetitive design element, wherein the repetitive design element exhibits two opposite open ends and two opposite closed ends, and wherein two or more than the repetitive design elements are connected to each other through the respective opposite open ends; Y b. removing the fibrous structure from the patterned web to produce the sanitary paper product.

In another example, the step of imparting a surface pattern to a sanitary paper product comprises contacting a molding member comprising a surface pattern with a sanitary paper product, such that the pattern is imparted to the product of toilet paper. The molding member may be a pattern band comprising a surface pattern.

In another example, the step of imparting a surface pattern to a sanitary paper product involves passing a sanitary paper product through a line engraving grip formed by at least one engraving roll comprising a surface pattern in accordance with the present invention, such that the surface pattern is imparted to the toilet paper product.

Non-restrictive examples Example 1: The following example illustrates a non-limiting example for a preparation of a sanitary paper product comprising a fibrous structure according to the present invention in a Fourdrinier machine for manufacturing the fibrous structure at pilot scale.

An aqueous slurry of eucalyptus pulp fibers (kraft pulp of bleached hardwood from Aracruz of Brazil) is prepared with a percentage of approximately 3% fiber by weight with a conventional pulper of the pulp and, afterwards, transferred to the pulp box. raw material of hard wood fiber. The eucalyptus fiber slurry from the hardwood raw material box is pumped through a raw material pipe to a hardwood machine head pump where the consistency of the slurry is reduced by about 3% by weight from the fiber to approximately 0.15% by weight of the fiber. Then, the 0.15% eucalyptus slurry is pumped and distributed uniformly in the upper and lower chambers of a multi-layered three chambered inlet box of a Fourdrinier wet-laid papermaking machine.

In addition, an aqueous slurry of NSK pulp fibers (northern softwood kraft) is prepared with a percentage of about 3% fiber by weight with a conventional pulp disintegrator and then transferred to the raw material box of soft wood fiber. The NSK fiber slurry from the softwood raw material box is pumped through a raw material pipe to refine it to a value of approximately 630 obtained with the Canadian method for the drainage capacity of pulp (CSF, for its acronym in English). Then, the refined NSK fiber slurry passes to the NSK machine head pump where the consistency of the NSK slurry is reduced from about 3% by weight of the fiber to about 0.15% by weight of the fiber. Then, the 0.15% eucalyptus slurry passes into the central chamber of a multi-layered three-chambered inlet box of a Fourdrinier wet-laid paper machine and is distributed therein.

The machine for manufacturing fibrous structures has a stratified entrance box composed of an upper chamber, a central chamber and a lower chamber, wherein the chambers feed the supply directly on the forming wire. The slurry of eucalyptus fiber with a consistency of 0.15% goes to the upper chamber of the entrance box and to the lower chamber of the entrance box. The NSK fiber slurry passes into the central chamber of the input box. The three layers of fibers are simultaneously supplied in a superimposed relationship on the Fourdrinier wire to form on it a three-layer embryonic web where about 25% are eucalyptus fibers that constitute the upper layer, about 25% are eucalyptus fibers that constitute the lower layer and approximately 50% are NSK fibers that constitute the core layer. The dewatering occurs through the Fourdrinier wire with the help of a deflector and vacuum boxes of the wire table. The Fourdrinier wire is the one designed by Asten Johnson 866A. The Fourdrinier wire speed is approximately 229 meters per minute (mpm) (750 feet per minute (ppm)).

The wet embryonic web is transferred from the Fourdrinier mesh, with a fiber consistency of about 15% at the transfer point, to a patterned drying fabric. The speed of the drying cloth with pattern is equal to the speed of the Fourdrinier wire. The drying fabric is designed to obtain a pattern of low density pillow regions and high density elbow regions. This drying fabric is formed by pouring a waterproof resin surface onto a mesh fabric of support fibers. The support fabric is a double layer mesh of 127 x 52 filaments. The thickness of the resin layer is approximately 0.30 mm above the support fabric.

An additional water extraction is achieved by vacuum assisted drainage until the web has a fiber consistency of about 20% to 30%.

While in contact with the patterned drying cloth, the weft is pre-dried with through-air presechers until a fiber consistency of about 56% by weight is achieved.

After pre-drying, the semi-dry web is transferred to the Yankee dryer and adhered to the surface of the dryer with a spray-folding adhesive. The creping adhesive is an aqueous dispersion with active compounds consisting of approximately 22% polyvinyl alcohol, approximately 11% CREPETROL A3025 and approximately 67% of CREPETROL R6390. CREPETROL A3025 and CREPETROL R6390 are commercially available from Hercules Incorporated of Wilmington, Del. The index of supply of the folding adhesive to the Yankee dryer surface is about 0.15% of solid adhesives based on the dry weight of the weft. The fiber consistency increased to approximately 97%, before the weft was creped by drying with a blade from the Yankee dryer.

The scraper blade has a beveled edge of approximately 25 degrees and is located with respect to the Yankee dryer to provide an impact angle of approximately 81 degrees. The Yankee dryer is used at a temperature of approximately 177 ° C (350 ° F) and a speed of approximately 229 mpm (750 ppm). The fibrous structure is wound on a roll by the use of a surface driven reel drum having a surface velocity of about 205 mpm (673 ppm). Subsequently, the fibrous structure can become a single-sheet health paper product.

Then, the fibrous structure is converted into a sanitary paper product by loading the roll of fibrous structure into an unwinding support. The line speed is 244 m / min (800 feet / min). The fibrous structure is unwound and transported to a steam trap where steam is applied to the fibrous structure at a rate of 327-383 g / min. The vapor pressure is 200 to 262 kPa (29 to 38 psi) and the vapor temperature is 132 to 139 ° C (270 to 282 ° F). The fibrous structure is then transported to an etch support where the fibrous structure is wound to form a surface pattern according to the present invention in the fibrous structure. Then, the engraved fibrous structure is transported to a coiler where it is wound onto a core to form a log. Then, the fibrous structure trunk is transported to a saw to cut logs, where the trunk is cut into the final rolls of toilet paper. The toilet paper product is soft, flexible and absorbent.

Example 2: A sanitary paper product in accordance with the present invention is prepared by using a machine for manufacturing a fibrous structure having a layered inlet box having an upper chamber, a central chamber and a lower chamber. A pulp of eucalyptus fiber is pumped through the upper chamber of the input box (ie, the chamber that feeds directly into the forming wire) and, finally, an NSK fiber pulp is pumped through the central chamber from the input box and is supplied in superposed relation on the Fourdrinier mesh to form on this a three-layer embryonic web, from the which approximately 33% of the upper side is made of mixed eucalyptus fibers, 33% is made of eucalyptus fibers on the lower side and 33% is made of NSK fibers in the center. The dewatering occurs through the Fourdrinier wire, with the help of a diverter and vacuum boxes. The Fourdrinier wire is of a satin sheave configuration 5, having 34 monofilaments in the machine direction and 30 monofilaments in the cross machine direction per centimeter (87 monofilaments in the machine direction and 76 monofilaments in the machine transverse direction). inch), respectively. The Fourdrinier mesh speed is approximately 229 mpm (meters per minute) (750 ppm (feet per minute)).

The wet embryonic web is transferred from the Fourdrinier mesh, with a fiber consistency of about 15% at the transfer point, to a patterned drying fabric. The speed of the pattern drying cloth is equal to the speed of the Fourdrinier wire. The drying fabric is designed to achieve a pattern of linear channels oriented practically in the direction of the machine, which have a continuous network of high density areas (elbows). This drying fabric is formed by pouring a waterproof resin surface onto a mesh fabric of support fibers. The support fabric is a double layer mesh of 45 x 52 filaments. The thickness of the resin layer is approximately 0.28 mm (11 mils) above the support fabric.

While in contact with the patterned drying cloth, the weft is pre-dried by means of through-air presechers until a fiber consistency of approximately 65% by weight is obtained.

After pre-drying, the semi-dry web is transferred to the Yankee dryer and adhered to the surface of the dryer with a spray-folding adhesive. The creping adhesive is an aqueous dispersion with active compounds consisting of approximately 22% polyvinyl alcohol, approximately 11% CREPETROL A3025 and approximately 67% CREPETROL R6390. CREPETROL A3025 and CREPETROL R6390 are commercially available from Hercules Incorporated of Wilmington, Del. The index of supply of the folding adhesive to the Yankee dryer surface is about 0.15% of solid adhesives based on the dry weight of the weft. The consistency of the fiber is increased to approximately 97% before dry creping of the weft from the Yankee dryer with the use of a doctor blade.

The scraper blade has a beveled edge of approximately 25 degrees and is located with respect to the Yankee dryer to provide an impact angle of approximately 81 degrees. The Yankee dryer is used at a temperature of about 177 ° C (350 ° F) and a speed of about 229 mpm (750 ppm). The fibrous structure is wound on a roll with a winding drum driven on the surface with a surface velocity of approximately 200 meters per minute (656 feet per minute). The fibrous structure is subjected to an etching operation that imparts a surface pattern according to the present invention to a surface of the fibrous structure. The fibrous structure can then be converted into a two-sheet toilet paper product with a basis weight of approximately 39 g / m2. For each sheet, the outer layer having the fibrous eucalyptus pulp faces outwardly in order to form the consumer facing surfaces of the double sheet health paper product.

The toilet paper product is soft, flexible and absorbent.

Test methods Unless otherwise specified, all tests described in the present description, including those described in the Definitions section and the following test methods, are carried out with samples that were conditioned in an air-conditioned room. temperature of 23 ° C ± 1.0 ° C and a relative humidity of 50% ± 2% for a minimum of 2 hours before the test. All plastic or cardboard packaging of the article of manufacture must be carefully removed from the paper samples before the test. The samples tested are "usable units". "Usable units", as used in the present description, means sheets, flat surfaces of the raw material roll, preconverted flat surfaces and / or single-leaf or multi-leaf products. Except where otherwise indicated, all tests are carried out in a conditioned room, under the same environmental conditions and in the aforementioned conditioned room. Discard any damaged product. Samples that have defects such as wrinkles, tears, holes and the like are not tested. Conditioned samples as described in the present description are considered dry samples (such as "dry filaments") for testing purposes. All instruments are calibrated according to the manufacturer's specifications.

Basis weight test method The basis weight of a fibrous structure is measured in stacks of twelve usable units with the use of an upper load analytical balance with a resolution of ± 0.001 g. The balance is protected from drafts and other disturbances with the use of a surge protector. To prepare all samples, a precision cutting die measuring 8,890 cm ± 0.0089 cm ± 8,890 cm ± is used. 0. 0089 cm (3,500 in ± 0.0035 in by 3,500 in ± 0.0035) in.

With a precision cut matrix, the samples are cut into squares. The cut squares combine to form a stack with a thickness of twelve samples. The mass of the sample pile is measured and the result is recorded up to the nearest 0.001 g.

The basis weight is calculated in pounds / 3000 ft2 or g / m2 as follows: Base weight = (mass of the stack) / [(area of 1 square in the stack) x (number of squares in the stack)] For example Base weight (pounds / 3000 ft2) = [[pile mass (g) / 453.6 (g / pounds)] / [12.25 (inches2) / 144 (inches2 / ft2) x 12]] x 3000 OR Base weight (g / m2) = pile mass (g) / [79,032 (cm2) / 10,000 (cm2 / m2) x 12] The result is reported up to 0.1 pounds / 3000 ft2 or 0.1 g / m2 closer. The dimensions of the samples can be modified or varied with the use of a precision cutter similar to the one mentioned above, so that at least 645 square centimeters (100 square inches) of sample area remain in the stack.

Caliber test method The size of a fibrous structure and / or sanitary paper product is measured by using the Progage II thickness test model (Thwing-Albert Instrument Company, West Berlin, NJ) with a pressure foot diameter of 5.08 centimeters (area 20.3 cm2) (2.00 inches (3.14 in2 area)) at a pressure of 1.4 kPa (95 g / in2). Four (4) samples were prepared by cutting a useful unit so that each cut sample is at least 6.4 centimeters (2.5 inches) per side, avoiding folds, bends and obvious defects. Two stacks are created, with two samples in each, directionally aligned (ie, both oriented in MD in the stack). The first stack is placed on the anvil with the specimen centered under the pressure foot. The foot is lowered to 0.08 cm / s (0.03 in / s) at an applied pressure of 1.4 kPa (95 g / in2). The reading is taken after 3 seconds and the foot is lifted. The measurement is repeated in a similar manner for the remaining specimen stack. The caliber is calculated as the average caliber of the two cells, divided by 2 (because there are 2 specimens per battery), and it is reported in mils (0.003 in (0.001 in)) at the nearest 0.003 mm (0.1 mils).

Elevation test method An elevation of a surface pattern or portion of a surface pattern in a sanitary paper product, for example, an etching in a toilet paper product can be measured by the use of a GFM Mikrocad Optical Profiler commercially available from GFMesstechnik GmbH, Warthestra e 21, D14513 Teltow / Berlin, Germany. The GFM Mikrocad Optical Profiler instrument includes a compact optical measurement sensor based on the projection of digital micromirrors and consists of the following main components: a) DMD projector with direct controlled digital micromirrors of 1024x768, b) high resolution CCD camera (1300x1000 pixels) ), c) projection optics adapted for a measurement area of at least 44 mm x 33 mm, and d) matching resolution registration optics; a table tripod based on a small hard stone plate; a source of cold light; a computer for measurement, control and evaluation; computer application for measurement, control and evaluation ODSCAD 4.0, English version; and adjustment probes for lateral (x-y) and vertical (z) calibration.

The GFM Mikrocad Optical Profiler system measures the height of the surface of a sample of sanitary paper product by using the technique of projection of digital micromirror patterns. The result of the analysis is a map of surface height (z) as a function of the displacement xy. The system has a visual field of 48 x 36 mm with a resolution of 29 micras. The resolution of the height should be determined in 0.10 to 1.00 microns. The height range is 64,000 times the resolution.

To measure the height or elevation of a surface pattern or portion of a surface pattern on a surface of a sanitary paper product, proceed as follows: (1) The cold light source is turned on. The parameters in the cold light source should be 4 and C, which should give a reading of 3000K in the viewfinder; (2) The computer, monitor and printer are turned on and the ODSCAD 4.0 program or the upper Mikrocad program is opened; (3) The "Measurement" icon in the Mikrocad taskbar is selected and then the "Uve Pie" button is clicked; (4) A sample of sanitary paper product is placed with a measurement of at least 5 cm by 5 cm below the projection head and the distance is adjusted to obtain the best focus; (5) The "Pattern" button is clicked several times to project one of several focus patterns to help obtain the best focus (the cross cursor of the program should be aligned with the projected cross cursor when it is obtained the optimal approach). The projection head is positioned at normal for the sample surface of the toilet paper product; (6) The brightness of the image is adjusted by changing the aperture in the camera lens and / or altering the "increase" settings of the camera on the screen. The increase is determined at the lowest possible level while maintaining the optimum brightness to limit the amount of electronic noise. When the lighting is optimal, the red circle at the bottom of the screen marked "I.O." will turn green; (7) The standard measurement type is selected; (8) Click on the "Measure" button. This will freeze the active image on the screen and, simultaneously, begin the process of capturing the surface. The sample must be kept immobile during this time to avoid blurring of the captured images. The total set of digitized data from the surface will be captured in approximately 20 seconds; (9) The data is saved in a computer file with the extension ".orne". This will also save the image file of the "kam" camera; (10) The file is exported in the format FD3 v1.0; 11) At least three areas of each sample are measured and recorded; 12) Each file is imported into the SPIP software package (Image Metrology, A / S, Horsholm, Denmark); 13) With the use of the Average Profile tool, a profile line is drawn perpendicular to the transition region of the height or elevation (such as engraving). The averaging box is expanded in such a way as to include as much as possible of the height or elevation (engraving) to generate and average the profile of the transition region (from the upper surface to the lower part of the surface pattern or portion of the surface pattern (such as an engraving) and reinforcement for the top surface). A pair of cursor points is selected in the average line profile window.

To transport the surface data to the analysis portion of the program, click on the clipboard / man-shaped icon; (11) Now, click on the "draw lines" icon. A line is drawn through the center of a region of characteristics that define the texture of interest. Click on the Show line in section icon. In the section graphic, you click on two points of interest, for example, a maximum value and an initial value, then click on the vertical distance tool to measure the height in microns in adjacent peaks and use the horizontal distance tool to determine the spacing in the direction of the plane; and (12) for height measurements, 3 lines are used with at least 5 measurements per line, the high and low values for each line are discarded and the average of the remaining 9 values is determined. In addition, the standard deviation, maximum and minimum is recorded. For measurements of the x and / or y direction, the average of 7 measurements is determined. In addition, the standard deviation, maximum and minimum is recorded. The criteria that can be used to characterize and distinguish texture include, but are not limited to, the blocked area (ie, the feature area), the open area (area without features), the spacing, the size in the plane and the height. If there is a probability that the difference between the two texture characterization methods is less than 10%, the textures may be considered to be different from each other.

The dimensions and values described in the present description should not be understood as strictly limited to the exact numerical values mentioned. Instead, unless otherwise specified, each of these dimensions will refer to both the aforementioned value and a functionally equivalent range comprising that value. For example, a dimension described as "40 mm" refers to "approximately 40 mm." All documents mentioned in the present description, including any cross reference or patent or related application, are incorporated in the present description in their entirety as a reference, unless expressly excluded or limited in any other way. The mention of any document is not an admission that it constitutes a prior matter with respect to any invention described or claimed herein or that by itself, or in any combination with any other reference or references, teaches, suggests or describes said invention.

In addition, to the extent that any meaning or definition of a term in this document contradicts any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.

Although particular embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the appended claims are intended to cover all those modifications and changes that fall within the scope of this invention.

Claims

1. A sanitary paper product comprising a surface pattern having a repetitive design element, characterized in that the repetitive design element contains two opposite open ends and two opposite closed ends, and wherein two or more of the repetitive design elements are they connect to each other through the respective opposite open ends.

2. The sanitary paper product according to claim 1, further characterized in that the respective opposing connected open ends form a channel, preferably, wherein two or more of the repetitive design elements are oriented so that their respective opposed closed ends include the channel formed by the respective opposing open ends connected, preferably, wherein the channel is oriented at an angle with respect to the machine direction of the sanitary paper product from 10 ° to 80 °.

3. The sanitary paper product according to any preceding claim, further characterized in that the surface pattern further comprises a bottom design element, preferably, wherein the bottom design element comprises: 1) elements in line and / or 2) elements of points.

4. The sanitary paper product according to claim 3, further characterized in that the background design element is engraved.

5. The sanitary paper product according to any preceding claim, further characterized in that the repetitive design element comprises in-line elements, preferably, wherein the repetitive design element further comprises dot elements.

6. The sanitary paper product in accordance with any previous claim, further characterized in that the surface pattern is formed wet.

7. The sanitary paper product according to any preceding claim, further characterized in that the surface pattern is formed dry.

8. The sanitary paper product according to any preceding claim, further characterized in that the surface pattern is recorded.

9. The sanitary paper product according to any preceding claim, further characterized in that the sanitary paper product comprises filaments.

10. The sanitary paper product according to any preceding claim, further characterized in that the sanitary paper product comprises fibers, preferably, wherein the fibers comprise pulp fibers, more preferably, wherein the pulp fibers comprise wood pulp fibers and / or trichomes.

11. A method for manufacturing a sanitary paper product according to any of the preceding claims; The method comprises the steps of: to. providing at least one sheet of a fibrous structure; and b. imparting a surface pattern to the fibrous structure to produce the sanitary paper product, characterized in that the surface pattern has a repetitive design element, wherein the repetitive design element exhibits two opposite open ends and two opposite closed ends, and in where two or more of the repetitive design elements are connected to each other through the respective opposite open ends.

12. A method for manufacturing a sanitary paper product according to any of claims 1 to 10, the method comprises the Stages of: to. depositing fibrous elements on a patterned web to form a fibrous structure comprising a surface pattern having a repetitive design element, further characterized in that the repetitive design element exhibits two opposite open ends and two opposite closed ends, and wherein two or more of the repetitive design elements are connected to each other through the respective opposite open ends; Y b. removing the fibrous structure from the patterned web to produce the sanitary paper product.