Menstrual hygiene product in the form of a tampon and method of manufacture

Abstract

The present invention relates to a menstrual hygiene product (1) in the form of a tampon (2), comprising at least one, preferably recyclable, particularly biodegradable, first material (11), which is absorbent in the dried state, wherein the first material (11) is repeatedly washable at at least 90°C while maintaining a tampon shape, without losing its absorbency, wherein the first material (11) is based on cellulose and / or viscose and has moisture-absorbing cavities, wherein wall structures of the cavities of the first material (11) are flexible under the influence of moisture. Furthermore, a method of manufacture is proposed, as well as a set comprising at least one proposed menstrual hygiene product (1).

Description

[0001] Menstrual hygiene product in the form of a tampon and method of manufacture

[0002] The present invention relates to a menstrual hygiene product in the form of a tampon, a method for manufacturing a menstrual hygiene product, in particular in the form of a tampon, and a set comprising the proposed menstrual hygiene product.

[0003] Menstrual hygiene products are well-known absorbent feminine hygiene products that come in various forms. The best known are sanitary towels in the form of panty liners and tampons. These products are manufactured using synthetic materials. The use of disposable tampons made from synthetic materials and conventional sanitary towels leads to a considerable amount of waste and environmental pollution.

[0004] In addition, some of the chemicals used in these products can pose potential health risks. There is therefore an urgent need for a long-lasting, more sustainable and healthier alternative for menstrual hygiene products.

[0005] Tampons are well-known menstrual products that are inserted by hand and / or an applicator into the vagina of a person who is usually menstruating. The liquid is channelled through the outer layer into the inside of the tampon so that the liquid is constantly absorbed without inhibiting the natural flow. Due to their cylindrical shape, tampons are easy to insert into the vagina. The surface is often made of a smooth material and is sometimes structured with grooves to make it easier to absorb fluid. DE 20 2006 000 746 U1 , for example, provides an example of this. When inserted into the body, the tampon has a certain firmness, which becomes more flexible due to the absorption of bodily fluids, so that it is significantly larger, softer and more voluminous when removed from the body with the help of the return band.

[0006] Conventional tampons are thrown away at this point or mistakenly flushed down the toilet, which - due to the mass of menstruating people - creates a lot of waste and a large amount of plastic ends up in the groundwater. Disposable tampons usually consist of a mixture of viscose and cotton fibres, which are pressed into shape and then refined. During this process often use a sheath made of synthetic materials, which are initially in close contact with the woman's body and the environment for hours. These cannot be biodegraded but have to be disposed of or incinerated. They therefore represent an immense burden for people and the environment. It is therefore desirable to have an alternative to the disposable product. It is true that there are also proposals for reusable tampons, such as those in WO 95 / 13040. However, these have inherent disadvantages and are therefore not applicable.

[0007] The aim of the present invention is to significantly reduce the amount of waste from menstrual hygiene products.

[0008] This problem is solved with a menstrual hygiene product in the form of a tampon with the features of claim 1 , with a method for manufacturing a menstrual hygiene product with the features of claim 11 and with a set with the features of claim 12. Further advantageous features and embodiments are shown in the dependent claims. However, the invention is not limited to the proposed embodiments. Rather, one or more features from the claims, the following description and / or the figures can be combined to form further embodiments of the invention. Also, the present claims are only a first approach to describe the invention. By way of derogation, further claims are proposed in which one or more features of the present claims can be replaced and / or supplemented by one or more features of the present description, or can also be deleted.

[0009] A menstrual hygiene product in the form of a tampon is proposed, comprising at least one, preferably recyclable, in particular biodegradable, first material which is absorbent in the dried state, wherein the first material is washable repeatedly at at least 90°C while retaining a tampon-like shape without losing its absorbency, wherein the first material is preferably based on cellulose and / or viscose and has moisture-absorbing cavities, wherein wall structures of the cavities of the first material are flexible under the influence of moisture.

[0010] The menstrual hygiene product preferably only has a biodegradable first material. This allows safe recycling. The biodegradable material is, for example, cellulose and / or viscose-based. Both materials can also be easily disposed of with menstrual residues contained therein in such a way that the menstrual hygiene product can decompose under the influence of heat, oxygen and possibly pressure. The decomposition can be supported by the addition of suitable bacteria or the adaptation of environmental conditions such as temperature, pressure, humidity and / or other factors. In addition to a first material, it is also possible that at least one further, second material and / or several additional materials are present. The second material can also be biodegradable. It is preferable that the biodegradable first material is the material that forms the cavities by means of wall structures. An additional material, for example the second material, can be used to enable bonding or layer consolidation of cavities. It is also possible for the second material to form a coating on the first material. The coating can be completely or only partially present. By means of the coating, for example, a surface property of the first material can be adapted to the menses fluid to be absorbed.

[0011] A further embodiment of the invention provides that the menstrual hygiene product consists exclusively of biodegradable materials. On the one hand, this can relate to the tampon as such. In addition, however, a material which surrounds the tampon, for example in a packaging, such as a plastic wrapper, can also be biodegradable. Furthermore, a ribbon that is attached to the tampon can also be made of a biodegradable material.

[0012] Preferably, the materials used for the tampon, the tape and the packaging are matched to each other in such a way that they can, for example, be subjected to the same recycling process. It is preferable that at least the material of the tampon and the tape are biodegradable by the addition of suitable bacteria. It is preferable if the menstrual hygiene product consists only of biodegradable components.

[0013] The menstrual hygiene product in the form of a tampon is preferably recognisable in that this form of the tampon is already at least partially present at the time of removal from a package. Preferably, the first material is moulded into a contour shaped in such a way that an elongated, preferably at least sectional approximately radially symmetrical body, in particular a cylindrically similar shaped body. The body can also have a changing diameter, for example a conical-like elongated shape at least in sections. The elongated shaped, in particular cylindrical-like shaped body has a thickness that is less than a length of the elongated shaped body. Preferably, the elongated shaped body has a dome. This dome avoids the formation of a circumferential edge. According to one embodiment, the dome can be made of the same material from which the other contour of the tampon is essentially moulded. A further embodiment provides for at least part of this dome to be made of a different material. For example, the dome can be moulded from a material that is mixed with the other material and thus creates a transition from the dome to the elongated body. A cylindrically shaped body does not have to be strictly cylindrical. Rather, it can also have a different thickness along its length. For example, the thickness can change continuously from one end to the other, for example leading to a thickening or thinning. It is also possible for the elongated body to have an outer shape that is, for example, wavy and / or has steps, interruptions or other contour shapes. For example, this interrupts a uniform outer contour, in particular a strictly cylindrical contour. This interruption can extend over the entire circumference of the contour. It is also possible that only partial circumferential areas are covered, but not the entire circumference. Different designs can also be provided that have different shapes. The moisture-absorbing cavities preferably have dimensions such that the menses to be absorbed is channelled into the menstrual hygiene product. Preferably, the moistureabsorbing cavities have a structure that enables the tampon formed in this way to be absorbent.

[0014] For example, the cavities can form capillaries that are able to guide the menses into the interior of the tampon by means of physical effects. The formation of capillaries that transport the menses can, for example, be influenced by a manufacturing process in such a way that capillaries change from the outside to the inside of the tampon, in particular changing their diameter and / or size, for example reducing and / or enlarging them. In a further embodiment, the capillaries can also widen again towards the inside of the tampon. In this way, the menses can be absorbed on the surface of the tampon, whereby the interior of the tampon enables a greater absorption of menses due to larger capillaries. Preferably, the menstrual hygiene product is designed in such a way that the first material used can act flexibly under the influence of moisture. For example, cavities can enlarge on the one hand. On the other hand, the material itself can also swell and allow the menses to be stored by swelling. Preferably, the tampon exhibits reversible swelling behaviour when absorbing the menses. This means that after cleaning the tampon at a temperature of at least 90 °C, the shape of the tampon is still present. On the other hand, the menses can be completely rinsed out so that the swollen material contracts again during a subsequent drying process. It is also possible, for example, for the material to stiffen again during drying compared to the swollen state.

[0015] A further embodiment provides that the menstrual product in the form of the tampon is provided with the first material with a greater stiffness in a dried state compared to a wet state and a greater flexibility in a wet state compared to a dry state and with a first diameter in a dried state and a second diameter in a wet state, wherein the first diameter is smaller than the second diameter. This effect is repeatable, especially after a large number of washing processes at 90 °C. For example, it has been found that when a first material made of cellulose and / or viscose is used, the tampon grown in this way has retained its shape and properties after 15 washes.

[0016] According to the invention, a menstrual hygiene product is further proposed, wherein the first material is at least a sponge. The sponge is preferably made of biodegradable material. With regard to biodegradability, reference is made to a clarification in the context of the disclosure, for example from the publication "Viscose fibres and plastics", position paper of the Industrievereinigung Chemiefaser e.V. (IVC) on the definition of plastics in the Disposable Plastics Directive, dated 24 February 2021 , in order to distinguish between biodegradable products on the one hand and plastics on the other. The information from the publication and the sources cited therein show the difference between plastics and biodegradable material, as it is also to be understood in the sense of the invention.

[0017] For example, a viscose sponge is made from regenerated cellulose and water, with colour pigments added if necessary. A cellulose sponge is produced, for example made from plant-based components such as wood or cotton. The sponge can be produced in different ways. It is also preferable for the sponge to be a viscose sponge. The viscose is preferably made from regenerated cellulose and water, and if necessary colour pigments and, if necessary, softener when using moist material is added. The preferred method is one in which the pore size can be adjusted. For example, the pore size can change over the thickness, for example increasing from the outside to the inside and decreasing again from the inside to the outside. In particular, a method is selected for producing a sponge in which it is ensured that no residues remain in the sponge that could be absorbed via the mucous membranes and have a harmful effect on health.

[0018] According to one embodiment, the sponge has an open-pored surface. The open-pored surface allows the menses to enter and be absorbed by the sponge. Preferably, the sponge is open-pored throughout. A further embodiment provides for the sponge to have a different pore size in an outer area compared to an inner area of the sponge. For example, the sponge has smaller pore sizes in the outer area compared to the inside.

[0019] It is also possible to use different sponges together. For example, these sponges can have different pore sizes from one another. The different sponges can lie in different constellations with each other or next to each other, directly or indirectly, for example separated by another layer of a different material, such as a biodegradable nonwoven.

[0020] A further embodiment provides for the menstrual hygiene product to be designed in such a way that the first material is formed by means of hollow fibres, preferably by means of a compressed viscose hollow fibre. The use of a hollow fibre makes it possible to use the inside of the fibre as a volume to accommodate the menses. At the same time, the use of the hollow fibre enables both compression and expansion by changing the thickness of the fibre. When using a hollow fibre made of viscose, there is also the possibility that the menses will cause the viscose itself to swell. This makes it possible for the viscose hollow fibre to exploit two effects: On the one hand, fluid absorption, for example via a capillary effect inside the hollow fibre and, on the other hand, the use of the material itself as a reservoir for liquid. Furthermore, the outer geometry of the hollow fibre can also have a liquidconducting property, preferably due to the formation of cavities that can fill with liquid.

[0021] Furthermore, it may be provided that the menstrual hygiene product is provided with a protective cover. This protective cover can, for example, serve as direct packaging to protect the tampon, e.g. against soiling. On the other hand, according to a further embodiment, it serves to extend the shelf life and thus the usability of the menstrual hygiene product. For example, this protective cover can be used to prevent moisture and / or liquid from directly entering the first material and thus, for example, a absorbent effect leading to a swelling of the menstrual hygiene product and thus its non-usability for the user.

[0022] A further embodiment provides for the protective cover to have a function for an unused and a used menstrual hygiene product. For example, the protective cover secures the unused tampon directly, as it surrounds it in a liquid- and moisture-proof manner. If the unused tampon is removed from the protective sleeve, a used tampon can then be repackaged using the same protective sleeve.

[0023] Preferably, the protective cover is designed in such a way that not only a used tampon of the same original size but also another used menstrual hygiene product of a different original size can be repackaged. The used menstrual hygiene product can, for example, be a tampon of a different original size. A further embodiment provides that the menstrual hygiene product to be repackaged can also be a sanitary napkin or another menstrual hygiene product of a different shape. For example, the protective cover has so much surface area that the used menstrual hygiene product can be more than just simply wrapped around it. Preferably, the used menstrual hygiene product can be encased in a moisture- and liquid-tight manner by means of the protective cover.

[0024] Furthermore, it is preferable if the material of the protective cover is also biodegradable. A further development even provides for the material of the protective cover to dissolve in water at a temperature of 90°C. Such a protective cover can, for example, be a bioplastic bag made from a combination of polyvinyl alcohol (PVAL), starch, glycerine and water. PVAL is responsible for the water solubility of the product. The polymer rejects most anhydrous solvents, is resistant to oils and greases and, once dissolved in water, can be filtered without leaving any residue in the water. This type of material mixture can also be reliably dissolved at lower temperatures, for example at 80°C. Used tampons stored in such a protective cover can also be placed in a container and then washed at 90°C in a washing machine. During washing, the protective cover dissolves without leaving any residue and the tampon remaining in the container is washed and cleaned accordingly. Pouches such as the Invisiblebag from Invisible Company, Hong-Kong, is classified as hydro-biodegradable and then compostable according to ASTM D6400 or EN13432, can be used. However, other comparable bags can also be used, which can, for example, consist of saccharides, starch or another biodegradable material. For example, bags labelled H2OK that have been tested by the Italian Laboratorio de Materiali Polimerici Ecocompatibile - Laboratory for Environmentally Compatible Polymeric Materials - (LMPE) can also be used. The manufacturer of these PVA-based bags is Medanos Claros HK Limited, #2302, 23 / F, Lee Garden Two, 28 Yun Ping Rd, Causeway Bay, Hong Kong, China. Sokufol Folien GmbH, Industriestrasse 11 - 13, 65549 Limburg, Germany, produces warm water soluble films for warm water from a release temperature of > 45°C based on PVOH, which can be used as pouches for used or unused tampons.

[0025] Preferably, the protective cover prevents menses from escaping from the protective cover. This in turn prevents, for example, contamination by the menses contained in and on the used menstrual product. The protective cover can, for example, be reclosable for this purpose. According to one embodiment, the protective cover has a predetermined opening for removing the unused menstrual hygiene product. This opening can be prefabricated, for example. For this purpose, for example, an area of the protective cover can have the reclosability, e.g. by means of an adhesive surface.

[0026] The protective cover can have a pocket-like shape that can be closed again.

[0027] For this purpose, for example, a tab can be provided on the pocket-shaped form, which is used to pull the material of the protective cover around the used tampon after it has been inserted into the pocket-shaped form of the protective cover. The pocket-shaped mould can then be closed tightly to seal the liquid.

[0028] According to a further design, the protective cover can have a flat mould into which the used menstrual product is wrapped. Preferably, it is provided that the respective side edges of the flat mould adhere to the material of the protective cover in such a way that the used wrapped menstrual product is stored in the protective cover in a liquid-tight manner. Adhesive bonding can be provided for this purpose, in particular adhesive surfaces on the side edges. When these adhesive surfaces come into contact with the remaining material of the protective cover, a connection is then created, preferably a liquid-tight connection. Such an adhesive surface can, for example, have a continuous adhesive application. Furthermore, several adhesive surfaces can be arranged one behind the other, thus achieving a barrier effect against moisture or liquid. It is also preferable if the material used, which provides the adhesive property, is also biodegradable. The material with the adhesive property can be sprayed on, printed on or applied in some other way. This can be done in line form, in dotted form or in any other way.

[0029] According to a further embodiment of the menstrual hygiene product, it is provided that this first material is provided with a sheath to which preferably one end of a string for removal is attached and preferably another end of the string for removal is attached to the first material. In this way, the wrapping and the first material are secured together, for example. According to one embodiment, the wrapping serves to protect the first material. Furthermore, according to a further embodiment, the wrapping can be designed for rapid liquid absorption and liquid transfer to the first material. Furthermore, it may be envisaged that the sheath provides a particularly soft surface which enables the menstrual hygiene product to be inserted or used in a particularly skin-friendly manner. According to another embodiment, the sheath can also be used to stabilise the first material arranged in the sheath, at least with regard to its shape. For example, it may be provided that the sheath has a higher elastic property compared to the first material.

[0030] For example, this or other properties can be used to exert pressure on the first material by means of the wrapping. Preferably, the material of the coating and the first material are bonded to each other. This can be achieved, for example, by intermingling fibres. In this case, at least one of the two materials is a fibre material or has fibres. The other material, on the other hand, is able to bond with the fibres, whether through adhesion, agglutination, interlocking of the materials or in some other way. For example, the first material and the material of the sheathing can also each have fibres. A connection between the wrapping and the first material can also be achieved, for example, by interlocking them. This can be achieved by means of needling, for example.

[0031] The menstrual hygiene product may further comprise a sheath of this type, in which the sheath comprises a knitted case, the knitted case preferably consisting of a viscose fibre and / or the case comprising hollow fibres, preferably at least one layer of the sheath being formed from hollow fibres. One advantage of a knitted material is that, on the one hand, it is possible to adjust the strength by the method of knitting. On the other hand, a knitted cover also allows a bond to be formed with the first material arranged in the cover. For example, a thread or fibre used for this purpose can be passed through the first material during the drawing process itself.

[0032] A further embodiment of the invention relates to the manufacture of the proposed menstrual hygiene products. For example, it is envisaged that the sheath is created and the first material is subsequently arranged in the sheath. If the sheath is a knitted sheath, the arrangement can also be made possible in a continuous process. In this case, for example, the first material is fed in the form of a cylindrical strand. The casing is continuously arranged, for example stretched, around this strand shape. The material created in this way can then be cut and, if necessary, fed into a further mould. However, other procedures are also possible in order to carry out a continuous manufacturing process. During production, it is also possible for the material of the coating and / or the first material to be subjected to a compressive load, either alone or together. On the one hand, this can be used to enable the respective materials to be joined together. On the other hand, this also makes it possible to carry out compression in such a way that a subsequent outer packaging protects the menstrual hygiene product at least against external contamination, preferably against moisture and / or liquid damage. Preferably, the outer packaging is designed with a protective cover as described above and in more detail below.

[0033] According to a further idea of the invention, which can also be pursued further independently, it is proposed to provide a pack with menstrual hygiene products, wherein a plurality of different menstrual hygiene products are contained together in this pack. Preferably, the proposed menstrual hygiene product is used. In one embodiment, at least some of the menstrual hygiene products are proposed menstrual hygiene products in the form of a tampon. Tampons of different sizes can be arranged in this packaging. Preferably, all of these tampons are reusable in the manner described. However, they can also be manufactured differently or have different materials. A further embodiment provides that, in addition to the proposed menstrual hygiene products, the pack may also contain other menstrual hygiene products. In particular, these can be menstrual hygiene products that have the form of a sanitary napkin. According to a further embodiment, this sanitary napkin can also be designed to be reusable, for example analogous to a basic manufacturing method or a basic structure as described here in relation to the proposed menstrual hygiene products for a reusable tampon. Furthermore, according to a further embodiment, it is possible that one or more menstrual hygiene products in the pack are only disposable products which must be disposed of after a single use. The pack can thus contain a variety of different menstrual hygiene products, but all packs have in common that at least some, preferably the majority, of the menstrual hygiene products contained therein are reusable.

[0034] According to a further idea of the invention, a method for producing a reusable menstrual hygiene product which can be washed several times at 90°C in the form of a tampon with a first material which is biodegradable, preferably with a first material as described above as well as below, is proposed, wherein the first material is pre-swollen before it is produced ready for sale as a menstrual hygiene product. Such a procedure enables the first material to be highly compacted, for example, and in particular to be produced and / or transported with maximum compaction. The high compaction process minimises the space required during transport. Furthermore, if an arrangement of the pre-compacted material is selected in such a way that the best possible utilization.

[0035] This makes it possible to minimise the available space of a package, thus reducing the waste of useless space and the overall transport costs. However, in order to make the material pre-compacted in this way usable during use, the menstrual hygiene product is exposed to moisture and / or liquid during the manufacturing process, for example. This is done in a defined manner so that the first material only expands as far as intended. This pre-swelling can, for example, take place both before and after a finishing step, in particular also after a wrapping. After pre-swelling, it is possible for the liquid and / or moisture contained in the first material to be removed again, for example via a drying process. Another embodiment again provides for the menstrual hygiene product to have a certain residual moisture content. The material or materials used in the menstrual hygiene product are preferably designed in such a way that this residual moisture is not suitable for bacteria or other germs to develop or grow during storage, for example. For example, packaging can be carried out using a protective gas, which prevents this. One such protective gas is nitrogen, for example.

[0036] According to a further idea of the invention, a set is provided ready for sale or assembly. The set comprises at least one menstrual hygiene product in the form of a tampon, preferably as described above or below and / or manufactured according to a method as described above or and a container, preferably a bag, in particular a wash bag and / or a liquid-tight storage bag for the menstrual hygiene product, wherein the menstrual hygiene product preferably consists of biodegradable material, which is washable and reusable several times at 90°C, and the container accommodates a plurality of menstrual hygiene products and stores them in the container. Preferably, the menstrual hygiene product is stored in a container when the menstrual hygiene product is washed in a washing machine, whereby the container is then permeable to blood and washing water. Furthermore, a container can also be liquid-tight. For example, a first container, which is liquid-tight, and a second container, which is permeable to menses and wash water, can be used. Another embodiment provides for a container to be used which is liquid-tight on the one hand, but which is also permeable to washing water on the other.

[0037] For example, a container can have a fixed shape, such as a container into which one or more menstrual products can be placed. The container can be a sphere, approximately a polygonal sphere. Other geometries are also possible, for example oval, cylindrical, cubic, rectangular or other geometries. Preferably, angular edges are not used. Preferably, edges are rounded or, for example, domes are placed on the respective end of a cylinder, resulting in rounded shapes. For example, this container can be repeatedly openable and reclosable, preferably liquid-tightly openable and reclosable. According to one embodiment, the container with solid walls can be liquid-tight. According to another embodiment, the container can be permeable to washing water. For example, the container may have one or more passages, preferably a plurality of passages, through which the wash water can pass, in particular flow in and out. A further development provides that at least a first and a second side of the container are each permeable, preferably via a plurality of perforations. It is also preferable if the first and second sides are opposite each other. A further embodiment provides for the first and second sides to abut one another. Again, it may be provided that several sides have apertures, preferably more sides have apertures than sides without apertures. It is also possible for all sides to have openings. It is also possible for at least one side, preferably a cover, to be arranged interchangeably, once without diffusers and once with diffusers. A further embodiment provides that at least one outlet, preferably all outlets of the container can be repeatedly opened and closed, in particular closed in a liquid-tight manner. For example, one or more openings can be opened or closed by moving and locking two wall areas of the container that run parallel to each other and can be moved relative to each other. It is also possible for the container to have one or more devices, each acting like a valve, which allow or block the entry of washing water. The container can not only be rectangular but also round, oval or otherwise shaped.

[0038] Furthermore, a reusable, washable tampon, essentially consisting of a biodegradable absorbent or monomaterial, a moisture-absorbing and moisture-binding intermediate membrane, a finely structured outer layer and a string for removal together in one mould, preferably a conical shape.

[0039] The absorbent material consists, for example, of a viscose filament yarn that is pressed by itself or by machine. It is preferable that the intermediate layer surrounding the core, preferably consisting of viscose, acts as a moisturebinding membrane by means of a plush weave. In a further embodiment, the tampon has an outer layer, preferably made of viscose, to protect the core and facilitate insertion into the body. Alternatively, the outer layer can also comprise at least one of the following materials: Cotton, hemp, batiste, finette and / or (tricot) jersey. It is preferable for the tampon if the return band is made of the same biodegradable material, preferably viscose, as the core. The tampon is designed for reuse over several menstrual cycles. Furthermore, the tampon is available in different sizes and / or shapes in order to be selected according to individual needs. The proposed tampon thus relates to a natural, washable and therefore reusable tampon that represents a more sustainable and healthier alternative to conventional disposable tampons. The use of biodegradable materials and the possibility of reuse over several menstrual cycles reduces the environmental impact and minimises potential risks to health. The tampon is very comfortable to wear and can be customised to the user's needs.

[0040] Manufacturing details:

[0041] Wrapping as outer layer (exemplary):

[0042] • an R / L tubular knitted fabric made from Lenzing Lyocell yarn, for example

[0043] • Tubular knit as a cover (produced on a very fine circular or flat knitting machine gauge E10 upwards, E24 (needles per inch) Intermediate layer (exemplary):

[0044] • 330dtex viscose filament yarn on E24 to create an R / L knitted fabric

[0045] • Bramante hollow fibre as fibre composite (here: spun fibre)

[0046] Various designs and their respective material compositions are described below by way of example. The dimensions, weights and sizes given here are exemplary and show, for example, how different sizes of reusable tampons can be realised. The respective details are therefore only to be understood as precise examples. Other sizes with different dimensions and weights are also possible.

[0047] During your period, you lose an average of 5-80 ml of blood every day. This wide range emphasises the relevance of different sizes of tampons, which are designed to meet the individual needs of menstruating women. A look at the absorption capacity of commercially available tampons, see Table 1 , provides guidelines for the properties of these tampons, which should be used as a guide to maintain the usual handling of the tampons:

[0048] Table 1: Properties of conventional tampons

[0049] In our own test to see how much the conventional tampons can absorb, we found that a mini tampon from o.b. had a capacity of approx. 15g. This significantly exceeds the values actually stated and thus endangers the user.

[0050] As a result, in test phase 02, four different sizes of tampons with a respective fluid absorption capacity of 6g, 10g, 14g and 18g will be tested. The aim of this test phase is to optimise the prototype by determining the fluid absorption capacity of the respective sizes in the optimum ratio of the different materials to each other. Other factors such as the feel, retention and stability of the tampon were also taken into account. The materials were analysed for their respective absorption capacity in relation to their own weight, see Table 2. A sponge used here is preferably not too thin as the core of the tampon. The core gives the tampon a stability that enables comfortable insertion. The dimensions of the various tampons or the individual components of the reusable tampon given as examples below make this possible.

[0051] Table 2: Absorption capacity in relation to the dead weight of the materials

[0052] The following has been calculated for each material component depending on the respective size: a) Absorption capacity of the sponge = dead weight of the sponge x absorption capacity b) Absorption capacity of the knitted fabric = weight of the knitted fabric x absorption capacity c) Absorption capacity of the fibre = dead weight of the fibre x absorption capacity and d) Absorption capacity of the sponge + absorption capacity of the knitted fabric + absorption capacity of the fibre = total absorption capacity of the tampon

[0053] The following Table 3 provides an overview of the results obtained based on different dimensions corresponding to different pad sizes. The absorption capacity is given in Table 3 as a factor of the absorption capacity of the tare weight. The component sizes and resulting tare weights are given below Table 3. table 3: Material distribution

[0054] The individual components can be combined, for example, by first determining the intrinsic weights of the sponge and knitted fabric and then determining the absorption capacity of the partial pad present. If an average absorption capacity for a size from Table 1 is taken as the target, the absorption capacity still to be provided by the fibre can then be determined. Knowing the absorption coefficient of the fibre, the dead weight of the fibre to be used in the dry state can then be determined. This shows an exemplary way of designing and also optimising the structure of a reusable tampon made of biodegradable materials using known data from known disposable tampons. If, for example, two components are given, the third component of the reusable tampon can be deduced from this.

[0055] Design examples ( w: width, d: depth, h: height, I: length)

[0056] Size XS of the tampon

[0057] 6.3 g absorption capacity of the tampon is calculated as follows: 1.8g + 2.5g + 2g = 6.3g

[0058] Broken down into the respective components: a) Sponge: Dimensions (in cm): 4.5(w) x 0.75(d) x 0.75(h), weight 0.3g (dry) b) Knitted fabric: Dimensions (in cm): 5(w) x 18(1) weight 1g (dry) c) Fibre: Total weight 2 g (when fully absorbed) -> weight 0.2 g (dry)

[0059] Size S of the tampon

[0060] 10g absorption capacity of the tampon is calculated as follows:

[0061] 2.4g + 4.25 g + 3.4 g = 10.05 g a) Sponge:Dimensions (in cm): 4.5(w) x 0.75(d) x 0.75(h), weight 0.3g (dry) b) Knitted fabric: Dimensions (in cm): 5(w) x 18(1) weight 1 ,7g (dry) c) Fibre: Total weight 3.4 g (when fully absorbed) -> dead weight 0.34 g (dry)

[0062] Size M of the tampon

[0063] 14g absorption capacity of the tampon is calculated as follows:

[0064] 2.4g + 3.75g + 8g = 14.15g a) Sponge: Dimensions (in cm): 4.5(w) x 1 (d) x 0.5(h) Weight 0.4g (dry) b) Knitted fabric: Dimensions (in cm): 5(w) x 18(1) Weight: 1.5g (dry) c) Fibre: total weight 8 g (when fully absorbed) -> Weight 0.8 g (dry)

[0065] Size L of the tampon here with an exemplary calculation method

[0066] Approx. 18g absorption capacity of the tampon:

[0067] 3g + 4.4g + 10.8g = 17.8g a) Sponge: Dimensions (in cm): 4.5(w) x 1 (d) x 0.7(h), Weight 0.5g (dry) b) Knitted fabric: Dimensions (in cm): 5(w) x 18(1) Weight 1.75g (dry)

[0068] As the knitted fabric can absorb 2.5 times its own weight, this results in

[0069] 1 ,75g x 2.5 = 4.4g absorption capacity for the knitted fabric. If you then add the absorption capacity of the sponge and the knitted fabric together, the result is: 3g + 4.2g = 7.2g. A desired absorption capacity of the tampon should be approx. 18 g total absorption capacity, so that based on the determined absorption capacities of the sponge and knitted fabric, the absorption capacity of the fibre can be calculated: 18g -7.2g = 10.8g. As the fibre can absorb 10 times its own weight, the calculation is: 1 g x 10 = 10g absorption capacity. This gives the result for the fibre given in c). c) Fibre: Total weight 10 g (when fully absorbed) -> weight 1 g (dry)

[0070] Design examples II

[0071] As an example, a further procedure for designing a reusable tampon is described below. A tampon M forms a benchmark for other tampons so that material components correspond in percentage terms in different sizes. For this purpose, the values determined for the tampon size M are transferred in relation to the different tampon sizes XS, S and L. The following formula system and the following calculation method are used for this purpose: a) Determination of the respective percentages according to the following formula Weight of material : dry weight of tampon x 100 = proportion of weight in % b) The weights of the individual components of the size M tampon with an absorption capacity of 14g when dry are added together:

[0072] 0.4g + 0.8g + 1 ,5g = 2.7g c) Percentage of material components in pad M for sponge 0.4 : 2.7 x 100 = 14.8%

[0073] Fibre: 0.8 : 2.7 x 100 = 29.6 %

[0074] Knitted fabric: 1 .5 : 2.7 x 100 = 55.6 % d) The absorption capacity of tampon M is 14g, divided into the following component absorption capacities based on the percentages:

[0075] Sponge 14.8% = 2.1g Fibre 29.6% = 4.1g Knitted fabric 55.6% = 7.8g The calculation steps are not specified in detail below. The following ratios result: Size XS of the tampon

[0076] Absorption capacity of tampon XS is 6 g, divided into sponge: 14.8% = 0.8 g

[0077] Fibre: 29.6% = 1.8g

[0078] Knitted fabric: 55.6% = 3.3g

[0079] Size S of the tampon

[0080] Absorption capacity of tampon S is 10g, divided into sponge: 14.8% = 1.5g

[0081] Fibre: 29.6% = 3g

[0082] Knitted fabric: 55.6% = 5.6g

[0083] Size M of the tampon

[0084] Absorption capacity of tampon M is 14g, divided into sponge: 14.8% = 2.1g

[0085] Fibre: 29.6% = 4.1g

[0086] Knitted fabric: 55.6% = 7.8g

[0087] Size L of the tampon

[0088] Absorption capacity of tampon L is 18g, divided into sponge: 14.8% = 2.6g

[0089] Fibre: 29.6% = 5.3g

[0090] Knitted fabric: 55.6% = 10g component absorption capacity

[0091] The absorption capacities of the individual components determined in this way can in turn be converted to the dry weights of the individual components. The size M of the tampon is also used as a standard for this, whereby this tampon has an absorption capacity of 14 g. This leads to the following conversion in relation to the respective absorption capacity of individual sizes as follows:

[0092] 6 g corresponds to 42.9%

[0093] 10 g corresponds to 71 .4%

[0094] 14 g corresponds to 100%

[0095] 18 g corresponds to 128.6%

[0096] The calculation of the individual material components in the dry weight takes into account the relationship determined for the Tampon size M:

[0097] 2.7g dry weight holds 14g liquid.

[0098] The two formulas below are used to determine the respective dry weight of the individual components: a) Dry weight x per cent = dry weight factor b) Material in % x dry weight factor = dry weight of the material components

[0099] For the different tampon sizes, the exemplary composition for production is as follows:

[0100] Tampon XS

[0101] 2.7 x 0.429 = 1.15g

[0102] Knitted fabric: 55.6% x 1.15g = 0.64g becomes 0.6g

[0103] Fibre: 29.6% x 1.15g = 0.34g becomes 0.3g

[0104] Sponge: 14.8% x 1.15g = 0.17g becomes 0.2g

[0105] Tampon S

[0106] 2.7 x 0.714 = 1.9g / / (2.1 x 0.714=1.5)

[0107] Knitted fabric: 55.6% x 1.93g = 1.07g becomes 1g

[0108] Fibre: 29.6% x 1.93g = 0.57g becomes 0.6g

[0109] Sponge: 14.8% x 1.93g = 0.28g becomes 0.3g Tampon M

[0110] 2,7 x 1 = 2,7

[0111] Knitted fabric: 55.6% x 2.7g = 1 ,5g becomes 1 .5g

[0112] Fibre: 29.6% x 2.7g = 0.79g becomes 0.8g

[0113] Sponge: 14.8% x 2.7g = 0.39g becomes 0.4g

[0114] Tampon L

[0115] 2.7 x 1.28 = 3.47g / / (2.1 x 0.714=1.5)

[0116] Knitted fabric: 55.6% x 3.5g = 1 ,94g becomes 2g

[0117] Fibre: 29.6% x 3.5g = 1 04g becomes 1g

[0118] Sponge: 14.8% x 3.5g = 0.51g becomes 0.5g

[0119] These are just two examples of how the design of a proposed tampon can be adapted to existing tampon sizes and thus to the user's usual behaviour and choice.

[0120] Even if this is based on idealised assumptions, the calculation methods enable an initial design that can then be adapted, for example through tests and inspections.

[0121] Moreover, the reusable tampons produced in this way have been tested in different ways, for example microbiologically, with regard to their multiple use. While some test series with regard to durability focused on multiple washings after each use, in particular also with different multiple washings, and were based, for example, on the external and internal durability of the tampon treated in this way, microbiological tests were also carried out to show which washing processes actually allow safe reusability and which do not. This is discussed below.

[0122] Results of microbiological tests: in order to ensure that the proposed tampon can be used without risk after use or after washing, various microbiological tests have been carried out by the applicant. With these tests, the bacterial cultures of the tampons were tested directly after use with a used tampon after various washing cycles and with detergent. The tampons were cut open in the centre for the tests and a sample was taken from each. The respective sample was spread on a culture medium. The following are important results from the microbiological tests:

[0123] Test result 1 : Tampon used, washed out by hand with cold water (comparative sample) CULTURE:

[0124] Micrococcus s. approx. 100 CFU (micrococci are skin and environmental germs of low virulence. Foreign body infections, e.g. on plastic material, occur very rarely)

[0125] Coagulase-negative staphylococci approx. 100 CFU Escherichia coli 10 CFU Vaginal flora

[0126] Test result 2: Tampon used, washed out by hand with cold water and washed at 90° Celsius CULTURE:

[0127] NO growth of bacteria

[0128] The user of such a menstrual hygiene product therefore has the option of making it reusable by washing it by hand and washing it at temperatures of 90° Celsius. Washing at high temperatures can also be done manually. The water can be heated to the desired temperature in a pot, for example on a cooker, using a kettle or other heating method. The temperature can be checked using a suitable thermometer, which has a measuring range that extends beyond 100° Celsius. Boiling water can also be used, i.e. water that is heated to 100° Celsius and above. Tests have shown that a typical 90° wash in a washing machine is sufficient to reduce the biological load of the used tampon to such an extent that it can be reused afterwards without any problems. No detergent was added in these tests. Washing machines with a boil wash program at 90 or 95° Celsius were tested, with a boil wash program duration of 11 / 2 hours or more. The tests also showed that washing with cold water alone is not sufficient to reduce the load on the used tampon to such an extent that it can be reused from a hygienic point of view.

[0129] In addition to the option of using a boil-wash program provided by conventional washing machines, which usually runs at a temperature of at least approximately 90° or more, tests have also been carried out which tested machine washing with a special washing program and showed that subsequent reuse of the tampon is also possible if a standard boil wash program is not used. It is therefore possible to wash the tampons for a certain initial period at 90° Celsius and above to ensure that bacteria, germs and other organisms are killed off. They can then be washed out with a second wash program, at a lower temperature. It is also possible to wash out at a lower temperature first and then use a boil wash temperature. The time required for washing out at a lower temperature can be longer or shorter than the boil wash time.

[0130] It is also possible to wash the used tampons at a temperature below 90° Celsius. Here it is important that the temperature is maintained for long enough to ensure that germs and bacteria are sufficiently washed out and killed so that they are harmless when the used and reused tampons are tested.

[0131] One embodiment envisages using a 60° Celsius wash cycle, whereby no eco program of a washing machine is used. The latter usually has too short a washing time. However, the problem with using a 60° Celsius wash cycle is that 60° Celsius is not always reliably achieved in the wash program. This depends on the washing machine. It has been found that at 60° Celsius it is also possible to clean tampons to such an extent that they are reusable, provided the soaking and rinsing time is long enough.

[0132] Another option for cleaning used tampons is to use detergent. There are various so-called hygiene detergents that should be used at 30° Celsius. However, the question arises as to whether these detergents actually achieve sufficient disinfection and cleaning. On the other hand, it is at least necessary to carry out a sufficient wash with clear water in the washing machine after using the detergent. As the hygiene detergents contain components which, if left in the tampon, are at risk of being absorbed via the mucous membrane when the user reuses the tampon, this risk must be avoided by sufficient rinsing with clear water.

[0133] It is also possible to use a washing program at 40° Celsius and a detergent containing bleach. As studies have shown, it is possible to achieve sufficient safety, at least with regard to viruses, see Michael Heinzel et al, "Evaluation of the virucidal performance of domestic laundry procedures" in International Journal of Hygiene and Environmental Health, Volume 213, Issue 5, September 2010, pages 334-337, https: / / doi.Org / 10.1016 / j.ijheh.2010.06.003. However, a sufficient wash cycle with clear water is also necessary here in order to prevent undesired parts of the detergent, among other things, from remaining in the tampon to be reused.

[0134] Another option, which can also be used in combination with the previous washing options, is the use of microwaves. It is recommended that moist, preferably washed tampons can be placed in a microwave and treated. By adjusting the strength of the microwaves and the duration of the microwave treatment, even germs or bacteria that are still present can be destroyed. It is also possible for pre-washed tampons that have been rinsed out to be treated using microwaves before being put through a washing cycle in the washing machine. Microwave treatment can also be carried out after the washing cycle in the washing machine. The cleaned tampon can be dried in the air, for example on a clothes line. However, the drying location should be selected in such a way that subsequent soiling by dust or other substances is avoided.

[0135] To ensure that the user has the freedom to use her preferred cleaning method, the proposed reusable tampons are designed to safely withstand multiple washes at a minimum of 90° Celsius.

[0136] It is preferable to arrange the tampons to be washed in a washing container such as a bag. This means that the tampons can be washed without being exposed to damage from the washing drum, for example from washing with buttons, hooks or other items.

[0137] Further advantageous embodiments are shown in the following drawing. However, the individual features shown here in individual figures are not limited to the respective embodiment. Rather, one or more features from one figure can be combined with one or more features from another figure to form a further embodiment. Furthermore, the solutions resulting from the respective figures can be considered in isolation. Preferably, they are to be understood as exemplary embodiments without, however, constituting a limitation as such. They show:

[0138] Fig. 1 a first tampon, essentially consisting of an absorbent body,

[0139] Fig. 2 a second tampon, essentially comprising an absorbent body and a sheath, Fig. 3 a third tampon, essentially comprising an absorbent body, a fibrous material and a coating with plush,

[0140] Fig. 4, Fig. 5 and Fig. 6 a fourth tampon comprising two tubular, crossed absorbent bodies which are surrounded by a knitted sheath comprising a viscose fibre, Fig. 7 a fifth tampon made of a fibre material and a coating, Fig. 8 an exemplary dimensioning of a possible wrapping using the example of a pattern illustration for the respective tampon sizes XS, S, M and L above, Fig. 9 a sixth tampon made of a fibre material and a reinforced coating,

[0141] Fig. 10 a seventh tampon with an absorbent body that can be wrapped with an exemplary wrapper,

[0142] Fig. 11a and Fig. 11 b an eighth tampon from the outside and once in cross-section.

[0143] Figure 1 shows a schematic view of a first menstrual hygiene product 1 in the form of a first tampon 2. An absorbent body 3 consists of a viscose sponge as the first material, which is manufactured without plasticizer and thus hardens in a dry state. A string for removal 4, preferably also made of viscose, is attached to the absorbent body 3 to facilitate removal. The string for removal 4 can, for example, be attached to the first material with a first and a second end 5, 6. The tampon shape of the first menstrual hygiene product 1 shown here schematically has an approximately cylindrical-shaped body 7 with a first tampon end 8, which is dome-shaped. At a second end of the tampon 9, which is shown here as an almost straight vertical cut to a longitudinal axis of the tampon shape, there may also be a dome-shaped end, in which the return strap 4 is attached, which differs from the illustration in Figure 1. The first material 11 , consisting of a sponge 12, has an open- pored surface 13, whereby the individual pores 14 are schematically indicated. The pores 14 are irregular and not uniformly distributed due to the manufacturing process. However, a pore size can at least be influenced by the manufacturing process, preferably also adjusted to an average size. The pore 14 forms a cavity 15, with the first material 11 of the sponge forming wall structures 16 surrounding the cavity 15.

[0144] Figure 2 shows a second menstrual hygiene product 17 in the form of a second tampon 18. A second absorbent body 19 shown here also has a viscose sponge which is produced without plasticizer and thus hardens in a dry state. A sheath 20 is arranged around the second absorbent body 19, shown here as a sheath 21 preferably knitted from a viscose fibre, which simplifies insertion as it provides a supple surface. A string for removal 22, preferably made of viscose, is attached to the sheath 20 in the form of the knitted sheath 20, which makes it easier to remove. The second tampon 18 is shown in a dry state, having a diameter D1 . The absorption of menses by the second tampon is indicated, which leads to a change in the volume of the second tampon. This can be determined by an increase in thickness to a diameter D2. In comparison between the second tampon in the dry state and in the wet state, an increase in volume is also accompanied by greater flexibility of the second tampon in the wet state.

[0145] Figure 3 shows a schematic view of a third tampon 23, essentially comprising a third absorbent body 24, preferably a sponge, a fibrous material 25 and a sheath 26 with plush. The fibrous material 25 surrounds the absorbent body 24, the fibrous material 25 again being surrounded by the sheath 26. The third tampon 23 also has a string for removal 27. The string for removal 27 can, for example, extend with a longer ribbon region within the third tampon

[0146] 23, preferably also extending one or more times around the third absorbent body 24 and / or the fibrous material 25. As shown, the third absorbent body 24 is completely surrounded by the fibrous material 25. It is also possible for one end of the absorbent body 24 to terminate together with an end region of the fibrous material 25, thereby making the absorbent body 24 visible to the outside. The third tampon 23 is produced, for example, by inserting the fibre material 25 and the third absorbent body 24 into the prefabricated casing 26. The fibrous material 25 can be in the form of one or more fibres of a material. However, different types of fibres can also be joined together, for example from different materials. For example, the fibre material 25 can first be formed around the third absorbent body 24 before both are then inserted into the prefabricated casing 26. It is also possible to use a different manufacturing method, for example first arranging the third absorbent body

[0147] 24, arranging the fibrous material 25 around it and then arranging the casing around the third absorbent body 24 and the fibrous material 25. However, other manufacturing methods are also possible. Preferably, all components are at least largely prefabricated before they are joined together. This allows a continuous manufacturing operation. Manufacturing lines can be provided for this purpose, whereby one component from each manufacturing line is fed into the tampon manufacturing process. However, it is also possible to produce at least one component of a tampon directly on site during a continuous manufacturing process. The fibrous material 25 forms cavities with its fibre or fibres, whereby the material of the fibres forms wall structures. Although these differ from those of a sponge, they preferably also provide a holding and binding structure.

[0148] Figures 4, 5 and 6 show a schematic view of a fourth tampon 34: the fourth absorbent body 28 consists of two intersecting hoses 29, which are made up of two parts; the sheath 30 of the tube 29 has a knitted viscose fibre;

[0149] This is filled with a very strongly compressed hollow fibre, in particular a Bramante hollow fibre 31 , to absorb and bind the liquid;

[0150] 32, preferably made of viscose, are attached to all four ends, which are brought together to form a string for removal 33; your own finger provides the necessary stability during insertion.

[0151] Figure 7 shows a schematic view of a fifth tampon 35: the fifth absorbent body 36 as the first material consists of a very strongly compressed hollow fibre, preferably a Bramante hollow fibre;

[0152] A sheath 37 knitted from a viscose fibre is located around the fifth absorbent body 36, which simplifies insertion as it provides a smooth surface. In this embodiment, the sheath 37 encloses the fifth absorbent body 36 completely, so that the fifth absorbent body 36 is not visible from the outside;

[0153] A string for removal 38, preferably made of viscose, is attached to the wrapping 37 to facilitate removal.

[0154] Figure 8 shows an exemplary dimensioning of a possible wrapping 39 using the example of an exemplary pattern representation for respective tampon sizes XS, S, M and L. Here, the wrappings have the following dimensions, but are not limited to these:

[0155] XS: a = 15 mm, b = 45 mm,c = 5 mm, d = 20 mm

[0156] S: a = 20 mm, b = 45 mm, c = 5 mm, d = 20 mm

[0157] M: a = 25 mm, b = 50 mm, c = 5 mm, d = 20 mm L: a = 30 mm, b = 50 mm, c = 5 mm, d = 20 mm

[0158] Figure 9 shows a schematic view of a sixth tampon 40: the sixth absorbent body 41 consists of a very strongly compressed hollow fibre, preferably a Bramante hollow fibre;

[0159] Around the sixth absorbent body 41 is a sheath 42 knitted from a viscose fibre, which makes insertion easier as it provides a smooth surface; the wrapping 42 is reinforced at the upper end 43, for example by another bond 44. This can, for example, generate the additional stability required. The reinforcement 45 can also be produced by other means, for example by means of a multilayer structure, an additional material, another material and / or by means of compaction;

[0160] A string for removal 43, preferably made of viscose, is attached to the wrapping 42 to facilitate removal.

[0161] Figure 10 shows a schematic view of an example of a wound seventh tampon 47: a seventh absorbent body 47 consists of a sponge, preferably a viscose sponge, which is manufactured without plasticizer and thus hardens in a dry state;

[0162] The seventh absorbent body 47 is surrounded by a cover 48 made of uncoloured organic cotton; this envelope 48 not only comprises the seventh absorbent body 47, but also has a taper 48 on one side, which is for example 5 to 7 cm long and preferably goes down to a height of 2 to 3 cm. Other dimensions and a different cut of the protrusion are also possible;

[0163] A string for removal 49 is preferably attached to the wrapping 48; the protrusion 50 is wrapped around the seventh absorbent body 47 and secured with the string for removal 49;

[0164] The wrapped seventh tampon 46 can be cut as shown, but also differently. In particular, the shape of the wrap 48 can also be different from that shown. In the same way, the taper 48 can also be attached by other means, for example without using the string for removal 49.

[0165] Figure 11a and Figure 11 b show a schematic view of an eighth tampon 51. The first material in the centre is a sponge as the eighth absorbent body 52, surrounded by a non-woven material 53, for example, although another fibre material can also be used. Both are surrounded by a sheath 54. In this eighth tampon 51 , the sponge and the non-woven material 53 extend to one end 54 of the eighth tampon 51 , so that the sponge and the non-woven material 53 are visible at this end 54, as shown in Fig. 11 b.

[0166] Figure 12 shows a ninth tampon 56 in a schematic view. A sponge is arranged in the centre as the ninth absorbent body 57, which serves as the first material. The absorbent body 57 is completely surrounded by a casing 58. The absorbent body 57 is connected to a further part of the tampon 56 by a string for removal 59. This second part consists of a cover 60 filled with a Bramante hollow fibre 61 as a lining. The two parts of the tampon, consisting of the absorbent body 57 and the filled cover 60, can be connected to one another by being put together. In the connected state, they form the complete tampon 56.

[0167] Figure 13 shows a second wound tampon 62 in a schematic view. The tampon comprises a tenth absorbent body 63, which consists of a sponge, preferably a viscose sponge, which is produced without plasticizer and is therefore hardened in a dry state. The absorbent body 63 is surrounded by a casing 64. This wrapping 64 is filled with a bramant hollow fibre 65. In addition to the wrapping of the absorbent body 63, the wrapping 64 has a protrusion 66 on one side. This protrusion is, for example, 5 to 7 cm long and preferably extends down to a height of 2 to 3 cm. Other dimensions and cuts of the protrusion are also possible. A string for removal 67 is attached to the wrapping 64. The extension 66 is tied around the absorbent body 63 so that the tampon 62 is wrapped. The string for removal 67 is used to secure it. The wound tampon 62 can be designed both in the illustrated form and with alternative cuts and dimensions.

[0168] Figure 14 shows an eleventh tampon 68 in a schematic view. The tampon comprises an eleventh absorbent body 69, which consists of a sponge, preferably a viscose sponge. Surrounding the absorbent body 69 is a fibrous batt 70 made from a fibre. The absorbent core 69 and the wrapped fibrous batt 70 are encased in a knitted wrapper 71 . This wrapper is preferably made of viscose and serves to provide a pliable surface for easier handling and use. A string for removal 72 is attached to the knitted sheath 71 , which facilitates the removal of the tampon. The eleventh tampon 68 is closed at the lower end 73, which gives it a compact and stable shape. List of reference symbols

[0169] First menstrual hygiene product

[0170] First tampon

[0171] Absorbent body

[0172] String for removal

[0173] First end of the string for removal Second end of the string for removal cylindrical-shaped body First end of the tampon Second end of the tampon Dome-shaped finish

[0174] First material

[0175] Sponge open-pored surface Pores

[0176] Cavity

[0177] Wall structure

[0178] Second menstrual hygiene product second tampon

[0179] Second absorbent body

[0180] Wrapping knitted cover String for removal third tampon

[0181] Third absorbent body

[0182] Fibre

[0183] Wrapping of the first material

[0184] String for removal

[0185] Fourth absorbent body

[0186] Hoses

[0187] Wrapping of a hose Bramante hollow fibre Ribbon

[0188] Wrapping of a hose fourth tampon fifth tampon

[0189] Fifth absorbent body

[0190] Wrapping

[0191] Wrapping of a hose

[0192] Wrapping sixth tampon Sixth absorbent body Wrapping upper end 4 Binding 5 Reinforcement 6 seventh tampon 7 Seventh absorbent body 8 Wrapping 9 Wrapping of a hose 0 Debauchery 1 eighth tampon

[0193] 52 eighth absorbent body

[0194] 53 Fleece material

[0195] 54 Wrapping

[0196] 55 End

[0197] 56 ninth tampon

[0198] 57 ninth absorbent body

[0199] 58 cover

[0200] 59 string for removal

[0201] 60 filled cover

[0202] 61 Bramante hollow fibre

[0203] 62 second wound tampon

[0204] 63 tenth absorbent body

[0205] 64 wrapping

[0206] 65 bramant hollow fibre

[0207] 66 protrusion

[0208] 67 string for removal

[0209] 68 eleventh tampon

[0210] 69 eleventh absorbent body

[0211] 70 fibrous batt

[0212] 71 knitted wrapper

[0213] 72 string for removal

[0214] 73 lower end a,b,c,d Dimensions

[0215] D1 first diameter of the tampon when dry

[0216] D2 second diameter of the tampon when wet

Claims

Claims1 . Menstrual hygiene product (1 ) in the form of a tampon (2), comprising at least one, preferably recyclable, in particular biodegradable, first material (11) which is absorbent in the dried state, the first material (11) is repeatedly washable at at least 90°C while retaining a tampon-like shape without losing its absorbency, wherein the first material (11) is based on cellulose and / or viscose and has moisture-absorbing cavities (15), wherein wall structures(16) of the cavities (15) of the first material (11 ) are flexible under the influence of moisture.

2. Menstrual hygiene product (1 ) according to claim 1 , characterised in that the menstrual hygiene product (1) is in the form of the tampon (2) with the first material (11) having a greater stiffness in the dried state compared to a wet state and a greater flexibility in the wet state compared to the dry state and having a first diameter (D1) in the dried state and a second diameter (D2) in the wet state, wherein the first diameter (D1) is smaller than the second diameter (D2).

3. Menstrual hygiene product (1 ) according to claim 1 or 2, characterised in that the first material (11) is a sponge.

4. Menstrual hygiene product (1 ) according to claim 1 or 2, characterised in that the first material (11) is formed by means of hollow fibres, preferably by means of a compressed viscose hollow fibre.

5. Menstrual hygiene product (1 ) according to one of the preceding claims, characterised in that it consists only of biodegradable components.

6. Menstrual hygiene product (1 ) according to one of the preceding claims, characterised in that the first material (11) is provided with a coating (20)to which preferably a string for removal (4) is attached on the one hand and on the other hand to the first material (11 ), particularly preferably a first end (5) of the string for removal is attached to the wrapping (20) and preferably a second end (6) of the string for removal (4) is attached to the first material (11).

7. Menstrual hygiene product (1 ) according to claim 6, characterised in that the sheath (20) has a knitted sheath, the knitted sheath preferably consisting of a viscose fibre, and / or the sheath (20) has hollow fibres, preferably at least one layer of the sheath (20) is formed from hollow fibres.

8. A menstrual hygiene product (1 ) according to any one of claims 1 to 7 in a pack comprising a plurality of different menstrual hygiene products (1), at least part of which are menstrual hygiene products (1 ) according to at least one of the preceding claims, other menstrual hygiene products in the pack being in the form of a sanitary napkin.

9. A reusable menstrual hygiene product (1 ) in the form of a tampon (2) according to any of claims 1 to 8 which can be washed several times at 90°C, comprising a first material (11) which is biodegradable, wherein the first material (11 ) is pre-swollen before it is produced ready for sale as a component of the menstrual hygiene product (1).

10. At least one menstrual hygiene product (1 ) in the form of a tampon (2), according to any of claims 1 to 9 and / or produced according to a method according to claim 11 , and a container, preferably a bag, in particular a wash bag and / or a liquid-tight storage bag for the menstrual hygiene product, forming a set, the menstrual hygiene product (1) preferably consists of biodegradable material, which is washable and reusable several times at 90°C, and the container holds a plurality of menstrual hygiene products (1) and stores them in the container, preferably when the menstrual hygieneproduct (1) is in a washing machine, whereby the container is preferably permeable to blood and washing water.

11. Method for producing a reusable menstrual hygiene product (1 ) in the form of a tampon (2) which can be washed several times at 90°C, comprising a first material (11 ) which is biodegradable, preferably according to one of claims 1 to 8, wherein the first material (11 ) is pre-swollen before it is produced ready for sale as a component of the menstrual hygiene product (1).

12. A set comprising at least one menstrual hygiene product (1 ) in the form of a tampon (2), preferably? according to one of claims 1 to 8 and / or produced according to a method according to claim 9, and a container, preferably a bag, in particular a wash bag and / or a liquid-tight storage bag for the menstrual hygiene product, wherein the menstrual hygiene product (1 ) preferably consists of biodegradable material, which is washable and reusable several times at 90°C, and the container holds a plurality of menstrual hygiene products (1) and stores them in the container, preferably when the menstrual hygiene product (1) is in a washing machine, whereby the container is permeable to blood and washing water.

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