JP2023512595A - sanitary paper - Google Patents

Abstract

The present invention is a sanitary paper in the form of a web for wet applications, preferably composed of mutually continuous sheets connected to each other by tear-away perforations, the sanitary paper comprising embedded reinforcing fibers. wherein the reinforcing fibers have increased tear strength at initial wetting and at least partially lose the tear strength of the reinforcing fibers after extended wetting; At the latest in the system, it decomposes into smaller pieces over time after wetting. Furthermore, the present invention relates to sanitary paper comprising individual sheets, each having at least one break-up perforation, said break-up perforations allowing said sheet to be wetted at the latest in a sewage system over time. It provides dissolution into smaller pieces over the length.

Description

The present invention relates to sanitary paper for moist applications, preferably composed of mutually continuous sheets connected by tear-away perforations.

Sanitary wipes in the form of wet wipes are often used for simple and gentle cleaning of the skin. Conventional wet wipes are often composed of different nonwoven fabrics that are absorbed with lotion. The wipe thus has a particularly high wet tear strength and also feels comfortable on the skin.

This high wet tear strength is particularly advantageous during use, but at a later point in time, i.e. use when the consumer disposes of the wet wipes in the toilet rather than properly disposing of them in the trash. This causes major problems when processing wipes that have been deleted. Moist toilet paper is also known, which is used on a large scale and is mostly constantly entering the sewage system due to toilet flushing.

In particular, due to its high wet tear strength, this wet wipe or moist toilet paper decomposes poorly or not at all in sewerage systems, thus leading to large blockages of drain pipes over time. can give rise to Such clogging of the wastewater system not only causes great costs, but can also damage the wastewater pipes.

In view of these points, it is an object of the present invention to provide a sanitary paper that has sufficient wet strength and is easily and quickly degradable.

According to the invention, four different but combinable solutions are satisfied by the sanitary paper according to any one of claims 1-4.

According to aspects of the present invention, the sanitary paper is especially composed of a cellulose mass with embedded reinforcing fibers. The reinforcing fibers have an increased tear strength at initial wetting and at least partially lose the tear strength of the fibers after extended wetting, and the sheet is used in sewage systems at the latest over time after wetting. breaks down into smaller pieces.

The reinforcing fibers may be composed of hydrophobically treated fibers, such as cellulose, the hydrophobicity of which is reduced after sufficient time in the waste water and the reinforcing fibers lose their strength. The ratio of reinforcing fibers to the remaining cellulose mass is such that the sanitary paper still absorbs a lot of moisture at the latest in the sewage system, the fibers separate from each other and the sheets of sanitary paper break up into smaller pieces and thus blockages in the sewage system. is selected so that it cannot give rise to

According to a second aspect of the invention, a sanitary paper in the form of a web for wet applications is provided, preferably composed of mutually continuous sheets connected to each other by tear-away perforations. The sanitary paper is composed of a cellulose mass, characterized in that the sanitary paper is present in at least two layers, the lignin content of one layer being higher than the lignin content of the other layer or the other layer from which the lignin content is removed. It is characterized by

Since lignin is water repellent, a layer with a high lignin fraction can serve for sanitary papers with higher tear strength than e.g. conventional toilet paper, where the lignin fraction is carefully washed off to increase the absorbency of the paper. can. According to the present invention it has further been appreciated that layers with a high lignin fraction are washed out into the wastewater after the residence time so that the lignin no longer contributes strength and the toilet paper degrades.

According to a third aspect of the invention, a sanitary paper in web form for wet applications is provided, preferably composed of mutually continuous sheets connected to each other by tear-away perforations. The sanitary paper is composed of a cellulose mass, characterized in that the sanitary paper is manufactured from paper towel material.

This proposal suggests that while paper towels do lose their strength in damp conditions, the loss of strength is not when used as damp toilet paper, but rather as sanitary paper decomposes in sewage systems. It is based on the recognition that it is declared only after a reasonable absorption.

Another aspect of the invention, which can also be used in combination with the first, second and third aspects of the invention, is that the sheet comprises at least one resolution perforation, the resolution perforation comprising: At the latest in the sewage system, it provides for the sheet to break down into smaller pieces over time after wetting. In this respect, it can be the case in particular for sanitary papers with the properties mentioned above. The break-up perforations represent additional perforations to the tear-away perforations, the break-up perforations do not yield to moisture on initial wetness or use of the sanitary paper, but provide for the breakup of the sheet into smaller pieces in the sewage system. It is designed to only Further, the tear-off perforations are formed such that they do not yield upon detachment of the sheet from the web, and the sheet is only torn apart at tear-off perforations provided for detachment purposes. This is achieved, for example, by differently spaced perforations having different sizes.

According to embodiments of the present invention, reinforcing fibers can be dissolved in the wastewater. Due to the dissolution of the reinforcing fibers, the sanitary paper can succumb to moisture and decompose into smaller pieces. In order to prevent blockage of the drain pipe directly adjacent to the toilet, it is particularly important that the sanitary paper already decomposes into smaller pieces after a relatively short time while remaining in the toilet, for example during the flushing process. can be provided. From an ecological point of view it is further particularly advantageous if the entire sanitary paper containing reinforcing fibers can be dissolved in water. Not only can this solve the problem of clogging, but it also means that wet wipes do not have to leave the wastewater treatment plant tank. This means that this wet pipe must be removed at the latest in a sedimentation tank and discarded, as conventional wet wipes do not dissolve in water.

According to another embodiment, the reinforcing fibers have a hydrophobic coating, which loses its effectiveness in waste water. An example of this is the lignin mentioned above, which is water-repellent. However, other hydrophobic coatings that achieve the same effect are also possible.

In a variant of implementation of the invention, the tear-away perforations and the separation perforations are slit perforations and/or hole perforations. The tear-away perforations and the break-away perforations are preferably formed differently to achieve different tear strengths for each perforation. Only the respective tear-off perforations should be torn open when one or more sheets are detached from the web. In sewage systems, the disassembly perforations provide for subsequent disassembly of the sheet into smaller pieces. The slits or holes of the breakup perforations and tear-away perforations can be specifically formed with different lengths or sizes and can be evenly or differently spaced from each other if desired.

The slit perforations of the breakaway perforations preferably have a length of between 6 mm and 8 mm, while the slit perforations of the tear away perforations preferably have a length of between 3 mm and 5 mm. The spacing between perforations can preferably be in the range of 0.5 mm and 1.5 mm respectively.

Embodiments provide that the tear-off perforations extend linearly along the entire width of the sanitary paper, whereby simple tear-off of one or more sheets can be achieved.

It is further conceivable that the tear-off perforations each run parallel to one another. Thus, the web can be divided into many similarly shaped sheets in a compact manner. The sheets can thus be rectangular, square or trapezoidal or have the shape of a parallelogram.

In principle, tear-off perforations are also possible, for example providing a single sheet with a triangular shape. In this embodiment, the tear-off perforations are substantially along the entire length of the web so that two successive tear-away perforations move apart at an angle to form a triangular shape with one edge of the web. correspondingly extending in a zigzag shape.

According to an embodiment, it is also conceivable for the splitting perforations to run wave-like along the entire length and/or along the width of the sanitary paper. Thus, the sheet can be broken into uniformly shaped or non-uniformly shaped pieces or strips.

According to another embodiment, the detachment perforations run zigzag along the entire length and/or along the width of the sanitary paper. The breakup perforations also provide for breakup of the sanitary paper sheet into uniformly shaped or non-uniformly shaped strips or pieces.

In other embodiments, more than one splitting perforation, possibly different splitting perforations, is provided. A combination of multiple and possible different breakup perforations can under certain circumstances even better initiate the breakup of a sheet of sanitary paper. The more disassembly perforations, the smaller pieces the sanitary paper can disassemble into the sewage system. The number of breakup perforations in the sanitary paper and the relative position of the breakup perforations with respect to each other can, in turn, determine the number and size of pieces each sheet breaks into the sewage system.

Also, in an embodiment, the tear-down perforations extend across the sanitary paper such that at least some of the tear-down perforations are crossed at least once. This can make the disassembly of the sanitary paper even easier, since the perforation intersection points will tear open more easily under the water of the sewage system.

According to a variant of the invention, the spacing between the individual perforations of the tear-off perforation is smaller than the spacing between the individual perforations of the disassembly perforation, so that the perforations have different tear strengths. have. Therefore, it should be avoided that the disassembly perforations already yield when the sheets are pulled apart.

According to an embodiment, the sanitary paper is composed of a plurality of layers, in particular 2 to 5 layers. For reasons of convenience, multi-layered sanitary paper has been shown to be preferred by consumers. In order, on the one hand, to connect the layers to each other and, on the other hand, to achieve the desired softness of the sanitary paper through the structured surface, the multi-layered sanitary paper can especially be embossed.

It is also particularly possible for one or more layers to have reinforcing fibres, while the remaining layers have no reinforcing fibres. Thus, several layers, such as the middle layer, can provide the desired wet tear strength and the outer layers serve for the desired softness and absorbency. Additionally, the multi-ply sanitary paper can also have disassembly perforations to further aid disassembly.

According to a variant, the sanitary paper has a width of between 7 cm and 14 cm, preferably between 8 cm and 12 cm, particularly preferably between 9 cm and 11 cm. These dimensions have not proven particularly advantageous in the past.

According to a further variant, the sanitary paper is wound on a tube, in particular a cardboard tube, so as to form a roll. Large quantities of sanitary paper can thus be easily distributed and consumed without requiring large quantities of (individual) packaging. This has also proven to be particularly advantageous from an ecological point of view, since unnecessary amounts of, for example, plastic packaging can be dispensed with.

An embodiment also provides that the sanitary paper is manufactured as tissue paper. Tissue paper has proven to be particularly advantageous in damp applications because it is particularly absorbent and can therefore absorb a lot of moisture. At the same time, the tissue paper also has a high softness, so that the end-user's high comfort requirements can be met at the same time.

According to a variant, the individual sheets have a length of between 10 cm and 20 cm, preferably between 13 cm and 17 cm, particularly preferably between 14 cm and 16 cm. This length has proven to be particularly advantageous and comfortable in practice.

The invention is explained below in more detail purely by way of example with reference to advantageous embodiments and drawings.

1 schematically shows a wound web of sanitary paper with disassembly perforations; FIG. Figures 4A and 4B show different implementation variants of the disassembly perforations; Figures 4A and 4B show different implementation variants of the disassembly perforations; Figures 4A and 4B show different implementation variants of the disassembly perforations; FIG. 3 shows a particular example of a sanitary paper with detachable perforations;

In figure 1 a sanitary paper 10 according to the invention is schematically shown in the form of a web 12 wound on a tube 14 to form a roll. The web is separated into individual sheets 18 by tear-off perforations 16 . Therefore, all of the individual sheets 18 have the same length L.

In addition, the sanitary paper 10 and its sheet 18 each have split perforations 20 which each extend along the entire length of the web 12 in a zigzag shape. Perforations 16, 18 are only shown on the unwound portion of web 12 for reasons of simplicity only. In practice, the perforations 16, 18 extend along the entire length of the sanitary paper. In this respect, the two decomposing perforations 20 extend precisely so that the perforations 20 cross each other many times. Crossing point 22 represents a particularly sensitive breaking point, which helps sheet 18 to better break down into individual pieces in the water of the sewage system.

In this example, the breaking up of the sheet 18 produces broken pieces in the form of triangles D and diamonds R, and the area of these broken pieces is small enough to prevent clogging of the drain pipe. It's becoming

2-4, an alternative embodiment of an exploded perforation 20 can be seen. For reasons of simplicity, tear-away perforations 16 are formed as longer slits 24, whereas break-away perforations 20 are substantially shorter slits 24 and are therefore distributed across the width of web 12, and , substantially more slits 24 are distributed. However, other shapes and variations of tear-away perforations 16 and break-away perforations 20 are possible, as can be seen, for example, in FIGS. 3-5.

Accordingly, a portion of web 12 of sanitary paper 10 is shown in FIG. , all are spaced apart from each other by a distance L equal to the length of the sheet 18 .

In this example, the breakup perforations 20 are also straight lines arranged parallel to each other and extending along the entire width of the web 12 . However, the spacing between breakup perforations 20 is less than the spacing L between breakaway perforations 16 to ensure that the sheet 18 breaks up into smaller strips. Thus, in the embodiment of FIG. 2, each sheet 18 has two split perforations 20. As shown in FIG.

In contrast, FIG. 3 shows two split perforations 20 extending along the length of the web 12 in a wavy fashion. Upon disassembly of the individual sheets 18 , three differently shaped pieces are thus produced from each sheet 18 . In practice, whatever shape the debris often has precisely does not play a substantial role, as long as the debris is small enough not to clog the drain pipe.

The exploded perforations 20 in FIGS. 3 and 4 are each shown as a solid line, which means that the spacing between the individual perforations is so small and so close that they are barely visible to the naked eye, and the individual perforations of the perforations are spaced so close together that they are barely visible to the naked eye. It schematically shows that it is possible to have

FIG. 4 shows another embodiment of web 12 provided with three breakaway perforations 20 . Similar to the two splitting perforations 20 of FIG. 1 running in a zigzag fashion, a further splitting perforation 20 is provided and running parallel to the tear-off perforations 16, similar to FIG. Hereby, if in use the sheet 18 is to be folded, for example at a (virtual) folding edge F, the length L of the sheet can be chosen to be larger. In this regard, the fold lines F drawn in FIGS. 4 and 5 represent pure phantom lines shown purely for easier understanding, but can be printed on paper if desired. . However, because of the additional disassembly perforations 20, disassembly into many smaller pieces is still provided so that the jamming problem described above can be prevented.

In addition to the illustrated disassembly perforations 20, in the different embodiments of FIGS. 1 to 4, a form of sanitary paper can be selected, which has reinforcing fibers according to the invention and is therefore very initially Further useful is a sanitary paper 10 that has a certain wet tear strength but degrades over time in the water of the sewage system.

Additionally, all of the webs can be designed and/or embossed with multiple layers to meet the high comfort demands that consumers place on sanitary wipes.

In a particular embodiment, as shown in FIG. 5, Hydraspun paper from Suominen company, which has additional break-up perforations 20 that allow individual sheets 18 to break up into smaller pieces, is used as the sanitary paper 10. is provided. In this respect, the resolution perforations 20 are formed by slits having a length of 6.8 mm and each spaced apart from each other by 1 mm. The tear-away perforations are similarly formed by slits each having a distance of 1 mm from each other. However, the slit length of the tear-off perforations is in each case only 4 mm, so that the tear-off perforations yield faster than the disassembly perforations (see FIG. 5). The dimensions specified above represent preferred values but should not be considered limiting. Preferred ranges for values are specified in the introduction of the description.

It can further be provided that the sanitary paper roll is inserted into a dispenser for wet toilet paper according to the example of EP 2 367 467 B1. Thus, moist toilet paper can be provided to the consumer and safely flushed down the toilet without blockage occurring in the drain pipe.

Reference Signs List 10 Sanitary paper 12 Web 14 Tube 16 Separation perforation 18 Sheet 20 Disassembly perforation 22 Intersection 24 Slit D Triangle F ... Bend line L ... Length R ... Rhombus

Claims (19)

Sanitary paper for moist applications, preferably composed of mutually continuous sheets (18) connected to each other by tear-away perforations (16), said sanitary paper (10) comprising embedded reinforcing composed of a cellulose mass with fibers, said reinforcing fibers having an increased tear strength at initial wetting and at least partially losing their tear strength after extended wetting; Sanitary paper for wet applications, characterized in that said sheet decomposes into smaller pieces over time after said wetting at the latest in a sewage system. Sanitary paper in the form of a web (12) for wet applications, preferably composed of mutually continuous sheets (18) connected to each other by tear-off perforations (16), said sanitary paper (10 ) has a cellulose mass and
For moist applications characterized in that said sanitary paper is present in at least two layers, the lignin content in one of said layers being higher than the lignin content of the other layer or the other layer from which the lignin content is removed. sanitary paper in the form of a web (12) of Sanitary paper in the form of a web (12) for wet applications, preferably composed of mutually continuous sheets (18) connected to each other by tear-off perforations (16), said sanitary paper (10 ) has a cellulose mass and
Sanitary paper in the form of a web (12) for wet applications, characterized in that said sanitary paper is manufactured from paper towel material. A sanitary paper, optionally according to any of claims 1 to 3, preferably composed of mutually continuous sheets (18) connected to each other by tear-off perforations (16),
Said sheets (18) each have at least one break-up perforation (20), said break-up perforations (20) allowing said sheets (18) to become more resilient over time after wetting at the latest in the sewage system. Sanitary paper, characterized in that it offers disintegration into small pieces. The sanitary paper according to claim 1 or 5, characterized in that said reinforcing fibers can be melted in waste water. 7. Sanitary paper according to at least one of claims 1, 5 or 6, characterized in that the reinforcing fibers have a hydrophobic coating, which loses its effectiveness in waste water. 4. Sanitary paper according to at least claim 3, characterized in that the tear-off perforations (16) and the separation perforations (20) are slit perforations and/or hole perforations. Sanitary paper according to at least one of the preceding claims, characterized in that the tear-off perforations (16) extend linearly along the entire width of the sanitary paper (10). Sanitary paper according to at least one of the preceding claims, characterized in that the tear-off perforations (16) each run parallel to one another. The sanitary paper according to at least one of the preceding claims, characterized in that the detachment perforations (20) run wave-like along the entire length and along the width of the sanitary paper (10). The sanitary paper according to at least one of the preceding claims, characterized in that the detachment perforations (20) extend in a zigzag shape along the entire length and along the width of the sanitary paper (10). Sanitary paper according to at least one of the preceding claims, characterized in that a plurality of split perforations (20), possibly different split perforations (20) are provided. 13. The sanitary paper according to claim 12, characterized in that the split perforations (20) extend over the sanitary paper (10) such that at least some split perforations (20) are crossed at least once. At least one of claims 1 to 13, characterized in that the spacing between the individual perforations of the tear-away perforations (16) is smaller than the spacing between the individual perforations of the splitting perforations (20). Sanitary paper described in . Sanitary paper according to at least one of the preceding claims, characterized in that the sanitary paper (10) consists of a plurality of layers, in particular 2 to 5 layers. At least one of claims 1 to 15, characterized in that the sanitary paper (10) has a width of between 7 cm and 14 cm, preferably between 8 cm and 12 cm, particularly preferably between 9 cm and 11 cm. Sanitary paper described in . Sanitary paper according to at least one of the preceding claims, characterized in that the sanitary paper (10) is wound around a tube (14), in particular a cardboard tube, so as to form a roll. Sanitary paper according to at least one of the preceding claims, characterized in that the sanitary paper (10) is produced as tissue paper. 2. Characterized in that the individual sheets (18) have a length (L) of between 10 cm and 18 cm, preferably between 12 cm and 16 cm, particularly preferably between 13 cm and 15 cm. 19. The sanitary paper according to at least one of 18.

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