UA126093C2 - Skin care fabric - Google Patents

Abstract

A skin care fabric for medical, pharmaceutical or cosmetic use includes at least 80 % by weight of microfibers whose fibers have a diameter of less than 50 microns and are a mixture of polyamide and polyester, wherein the fabric has been subjected to a splitting process by a alkaline solution treatment, splitting each microfiber producing fine fibers closely packed in a parallel structure having a capillary effect and an abrasive effect. The fabric has a surface weight of less than 180 g/m2 and is loaded with medical, pharmaceutical or cosmetic active agents. The fabric is a warp-knitted fabric having a first surface on one opposite side and a second surface on the other opposite side, wherein the first surface is mechanically roughened and cut making it fluffy and yet short-haired compact in order to leave as few loose fibers as possible on the skin during use and resulting in a further surface enlargement of the fabric structure, having a water absorbency of at least four times the surface weight of the fabric.

Description

microfibers, for the formation of thin fibers densely packed in a parallel structure, which provides a capillary effect and an abrasive effect. The material has a surface density of less than 180 g/m, and medical, pharmaceutical or cosmetic active substances have been added to it. The material is a core-bonded material containing a first surface on one opposite side and a second surface on the other opposite side; wherein the first surface is mechanically ruffled and trimmed to give it a fluffy and still short-haired compact structure so that it leaves as few fibers as possible on the skin during use and to further increase the surface area of the structure of the material having a water absorption of at least four times exceeds the surface density of the material.

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Scope of the invention

The present invention relates to a material for skin care, for medical, pharmaceutical or cosmetic use, containing at least 80 wt. 95 microfibers, where the fibers have a diameter of less than 50 microns and are a blend of polyamide and polyester, where the material has been subjected to a cleavage process using an alcohol solution to split each microfiber to form fine fibers densely packed in a parallel structure, which has a capillary effect and an abrasive effect, and where medical, pharmaceutical or cosmetic active substances are introduced into the material.

Prerequisites for creating an invention

Known skin care materials for a variety of applications, including face wipes. They usually come in sheets that are easy to hold in one hand, and are often packaged in a box for the user to pull out a single sheet. They are usually made of cellulose, which makes them very inexpensive. Unfortunately, because these materials tend to tear easily when used in a wet state, they are not suitable for use in humid environments.

The material described in US Patent Publication Mo 2010-0322989, which is incorporated herein by this reference for all purposes, is a fine abrasive skin care material consisting of microfibers infused with active ingredients and intended for single use. wet application. The textile surface was subjected to a splitting process. The thin material has a lattice structure and contains intermediate spaces, or gaps, lattices. The action of this grid consists in creating a space for split microfibers in the form of elementary threads, into which active substances are introduced.

During use, the material is moistened, usually with water, which washes the active substances from the material and brings them to the skin. As for the active substances, they can then be used to clean the skin, disinfect, apply a cream or moisturize, or deliver a pharmaceutical preparation for medical treatment of the skin.

Brief description of variants of the invention

The object of the present invention is to create a skin care material, mentioned at the beginning, with improved water absorption. Water absorption was found to be important

With a criterion for the effectiveness of such material. For example, when wiping the face, it is important that this material is sufficiently moist, but so that water does not drip from it. It is also important for medical applications that drops or splitting of fiber particles do not pollute the surrounding space. On the other hand, the material itself should not be very heavy, should have a structure that can be reliably grasped and create a feeling of softness on the face. In addition, it should be clear that the material leaves loose fibers on the skin.

Does the skin care material of the invention have a surface density of less than 180 g/m? and is a basic bound material. The skin care material of the invention comprises a first surface and a second surface, which is preferably formed on the side of the material opposite to the side of the material where the first surface is formed. In addition, the first surface is mechanically tousled and trimmed to give it a fluffiness and still short-haired compact structure in order to leave as few fibers as possible on the skin during application and to result in an additional increase in the surface area of the material structure that has the ability to water absorption, which is at least four times greater than the surface density of the material. The second surface is not subjected to mechanical ruffling. However, the basic structure of the second surface is such that it can be reliably grasped by the user's hand during the application of the material.

The material according to the invention is intended for one-time use and can be recycled.

During use, the material is moistened, usually with water, which washes the active substances from the material and brings them to the skin. As for active substances, they can then be used to clean the skin, disinfect it, apply a cream or moisturize it, or deliver a pharmaceutical drug. The material can be used for normal skin, as well as for damaged and scarred skin.

According to one aspect of the invention, the material is relatively light and has a low surface density, which is also an economically favorable factor for the one-time use of the material, since the use of raw material in it is reduced.

It was found that the structure of the material is important for it to be able to store liquid. For this, the material, according to an embodiment of the invention, is made of 60 basic bound. Basic knitting is a family of knitting methods in which the threads pass along zigzag paths along the length of the material, that is, following along adjacent knitting columns, rather than in a single row. For comparison, knitting along the width of the material is called weft knitting.

Since basic knitting requires the number of individual threads ("ends") to be equal to the number of loops in a row, basic knitting is almost always done on a machine faster than by hand. All warp-knitted materials can be stretched and are significantly more flexible than woven materials. After the woven material is cut, the base or weft may loosen, which is an undesirable skin care material for the user. This cannot happen with core-bound materials. In addition, and in contrast to normal knitted materials, basic knitted materials are resistant to the descent of loops. Due to the relatively complex production with the formation of multiple loops, the thickness of the core-bonded material is relatively large, and the material itself is very compact. Thanks to these structural features, the ability to retain water inside the material is increased, and liquid dripping from the material is reduced. Thus, it was established that, at this time, the preferred material for use in the above-described method is the base-bound material.

The grounded material is subjected to a splitting process, as a result of which the microfibers are split into a number of elementary threads. Thanks to this process, the surface area of the material increases, and thanks to the increased surface area, it is possible to bind more active substances in the material. In addition, thanks to capillarity, water is additionally retained in the gaps between the elements of thin elementary threads. The abrasive effect of the material is due to the relatively sharp edges of the elementary threads, which have a triangular cross-section. Thanks to the abrasive action, dry cells on the skin can be easily removed, which is supported by a large amount of water that washes the skin.

Thanks to the mechanical ruffling and shearing of the side of the first surface of the material, the surface area of the fibers is additionally increased. Thanks to the haircut, short ends are removed and a flat surface is defined. Preferably, the tousled and trimmed side is then pressed or treated with an anti-shrink treatment to provide greater compactness and to prevent the release of elementary threads (fibers) and their adhesion to the skin during use. In addition, water absorption is best when the material is compact so that it flows out

Because of the large number of gaps that make up the capillary channels. This first surface, however, remains fluffy. Although for some implementation options it is possible to carry out processing of the second surface, similar to the processing of the first surface, while it is preferable that the second surface remains in its original state and is not ruffled and trimmed. The second surface is a slightly glossier surface and is suitable for a secure grip by the user, while the first surface is flannel-like and has a matte appearance and is soft to the touch for the user.

In a currently preferred embodiment, the material according to the invention comprises a fiber of pure polyamide, in addition to a microfiber, which is much thinner than a microfiber. This provides the advantage of holding together the core-bonded material after the splitting process, since the splitting process does not adversely affect the polyamide fiber.

In an additional, currently preferred, embodiment, the active substances are encapsulated in liposomes. This is an advantage for the delivery of pharmaceutical substances, medicines. Liposomes are composite structures made of phospholipids and may contain small amounts of other molecules. Although liposomes can vary in size from a few micrometers to tens of micrometers, unilamellar liposomes are usually in the lower size range to allow for surface attachment and accumulation in painful areas for treatment of disease.

Additional currently preferred embodiments are described below.

Brief description of the drawings

Aspects and advantages of the invention are presented in the description herein, or may become apparent from the description, or may be learned by practical use of embodiments of the invention. One of ordinary skill in the art can better appreciate the features and aspects of such embodiments and other aspects included in the review of the technical documentation.

A full and comprehensive disclosure of the present invention, including the best mode of its implementation, for a person skilled in the art, is presented more specifically in this technical documentation, which includes reference to the attached drawings, in which: in fig. 1 shows a view of the second surface of the material proposed in the invention, but before splitting, with a 41-fold increase in actual dimensions; because in fig. 2 shows the view of the first surface of the material proposed in the invention, but before splitting, with a 41-fold increase in actual dimensions; in fig. C shows the view of the second surface of the material proposed in the invention after splitting, mechanical tousling and shearing, but before the introduction of substances, with a 41-fold increase in actual dimensions; in fig. 4 shows the view of the first surface of the material proposed in the invention after splitting, mechanical tousling and shearing, but before the introduction of substances, with a 41-fold increase in actual dimensions; in fig. 5 shows the view of the second surface of the finished material proposed in the invention, with a 41-fold increase in actual dimensions; in fig. 6 shows the view of the first surface of the finished material proposed in the invention, with a 41-fold increase in actual dimensions; in fig. 7 shows a view of the cut side of the fiber of the material proposed in the invention, but before splitting, with a 1500-fold increase in actual dimensions; in fig. 8 shows a view of the cut side of the fiber of the finished material proposed in the invention, with a 1500-fold increase in actual dimensions; in fig. 9 shows a view of the final edge of the finished material according to the invention, with a 100-fold increase in actual dimensions; in fig. 10 shows a view of the final edge of the finished material according to the invention, with a 75-fold increase in actual dimensions; in fig. 11 shows an enlarged view of the segment highlighted by the rectangle in fig. 10, with a 150-fold increase in the actual dimensions shown in fig. 10; in fig. 12 shows an enlarged view of the segment highlighted by the rectangle in fig. 11, with a 680-fold increase in the actual dimensions shown in FIG. 11.

Description of the examples of implementation of the invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed references are provided to present exemplary embodiments of the invention, one or more of which are illustrated in the accompanying drawings. Item numbers are used in the detailed description to refer to features shown in the drawings. The same or similar designations in the drawings and in the description are used to refer to the same or similar parts of the embodiments of the invention.

Each example is made to explain the invention, but not to limit (the scope) of the invention. Indeed, it will be apparent to those skilled in the art that modifications and variations may be made in the present invention without departing from its scope or spirit. For example, features illustrated or described as part of one embodiment may be used in another embodiment to provide yet another additional embodiment. Thus, it is intended that the present invention covers such modifications and variations as fall within the scope of the appended claims and their equivalents.

It should be understood that the ranges and limits mentioned herein include all sub-ranges located within the prescribed limits, including the limits themselves, unless otherwise stated. For example, the range from 100 to 200 also includes all possible subranges, examples of which are: from 100 to 150; from 170 to 190; from 153 to 162; from 145.3 to 149.6; and 187 to 200. Additionally, the limit of up to 7 also includes the limit of up to 5, up to 3, and up to 4.5, as well as all subranges within the limit, for example, from about 0 to 5, which includes 0 and 5; and 5.2 to 7, which include 5.2 and 7.

In fig. 1 shows an embodiment of the second surface 2 of a skin care material for medical, pharmaceutical or cosmetic use containing at least 80 wt. to microfibers 3, which have a diameter of less than 50 microns and are a mixture of polyamide and complex polyester, where the material has a surface density of less than 180 g/m2, where the material is a staple-bonded material. In fig. 2 shows an embodiment of the first surface 1 of the embodiment of the skin care material shown in FIG. 1. However, in fig. 1 and 2, the material is shown in its raw state.

In fig. C and 4 show the same material as in fig. 1 and 2, except that the material shown in FIG. C and 4, was further subjected to a splitting process by means of treatment with an alcohol solution, which causes splitting of each microfiber 3 shown in fig. With, in such a way that thin fibers or elementary threads 5 (see Fig. 4) are densely packed in a parallel structure, in which gaps are formed that have a capillary effect, and elementary threads 5 that have an abrasive effect when in contact with the skin user The first surface 1, shown in fig. 4, additionally mechanically tousled and trimmed, which makes it fluffy, and still short-haired and compact, so that as a result there is an additional increase in the surface area of the material structure, and at the same time, the ability of the material to release free fibers from it is reduced, so that as much as possible fewer fibers stuck to the skin during and immediately after application. The water absorption of this resulting material,

shown in fig. 4, at least four times its surface density.

In fig. 5 and 6 show a material similar to that shown in fig. C and 4, except that in the material shown in fig. 5 and b, medical, pharmaceutical or cosmetic active substances were additionally introduced, which cannot be seen with the naked eye in fig. 5 and 6. The second surface 2, shown in fig. 5, preferably not disheveled and thus dense and ready to be grasped by the user. In addition, according to a preferred embodiment, the material shown in FIG. 5 and 6, has been further compressed and/or subjected to an anti-shrink treatment in order to make it more compact.

As an example, microfibers can contain 40 wt. 95 of polyamide and 60 wt. 95 polyester, u/- 595 in each case. Additionally, the microfiber can preferably have a linear density in the range of about 150-200 dtex.

According to the views shown in all the drawings, the material for skin care, the material contains, in addition to the microfiber 3, a fiber 4 of pure polyamide, which can have a linear density in the range of about 38-55 dtex. Pure polyamide fiber 4 does not change after the splitting process. Pure polyamide fiber 4 can easily be identified in the drawings.

It was found that the prevailing material according to the invention has an average pile height on the fluffy, first surface 1 in the range from about 10 95 to 60 95 of the total thickness of the material, preferably in the range of about 25-55 95. Also, basically The knitted material has the best loop density in the range of about 16-20 loops per centimeter.

In some embodiments, the active substances are preferably encapsulated in liposomes.

Preferably, the active substances are particles having diameters in the range of about 20 to 130 nanometers.

Active substances can be introduced into the material in the range of about 5 g to 20 g of active substances per square meter of material, preferably in the range of about 9 g to 15 g/m".

Options for the implementation of individual sheets of material can preferably have an area of about 100-300 cm, preferably about 190-220 cm.

In fig. 7 and 8 show the fibers present in the material shown in FIG. 1 and 2 (see fig. 7) and fig. 5 and 6 (see Fig. 8), but on a larger scale. When comparing the state of the material on

From the various stages shown in these drawings, it can be seen that the microfibers C form a cord before splitting and are separated into individual elementary threads 5 after splitting. In addition, it can be seen that the polyamide fibers 4 remained intact.

In fig. 9-12 show views of the end edge (detected by means of a cross section of the sheet) of the finished material according to the invention at various degrees of magnification. In fig. 9 and 10, the polyamide fiber 4, due to which the material is held even after mechanical processing, is located near the second surface 2, while the first surface 1 is fluffy due to the elementary threads 5.

As indicated by the rectangle in fig. 10 and 11, in each of Figs. 11 and 12 show a further enlargement of a section taken from their respective previous figures. 10 and 11. Polyamide fibers 4 can be easily identified, and their differences from elementary threads 5 of split microfibers 3 are determined.

Embodiments of the material according to the invention have shown good results in water absorption tests and are preferred in skin care applications of all kinds, including facial wipes, medical, pharmaceutical and cosmetic applications.

List of item numbers on drawings 1 First floor 2 Second floor

C Microfiber 4 Polyamide fiber 5 Microfiber elementary thread after splitting

Claims (5)

FORMULA OF THE INVENTION 1. Skin care material for medical, pharmaceutical or cosmetic use, containing at least 80 wt. 95 microfibers that have a diameter of less than 50 microns and are a mixture of polyamide and complex polyester, subjected to a splitting process using an alcohol solution treatment, to split each microfiber, to form fine fibers densely packed in a parallel structure that provides capillary action and 60 abrasive action, where the material has a surface density of less than 180 g/me, and medical substances are introduced into it, pharmaceutical or cosmetic active substances; where the material is a core-bonded material comprising the first and second surfaces; wherein the first surface is mechanically ruffled and trimmed to give it a fluffy and still short-haired compact structure so that it leaves as few fibers as possible on the skin during use and to further increase the surface area of the structure of the material having a water absorption of at least four times exceeds the surface density of the material. 2. The material of claim 1, wherein the second surface is undisturbed and thus grippable and dense. 3. Material according to claim 1 or 2, which is subjected to anti-shrinkage treatment to make it more compact. 4. Material according to any one of the previous items, in which microfibers contain 40 wt. 95 of polyamide and 60 wt. to complex polyester, w/-5 96 in each case. 5. The material according to any one of the previous items, in which the linear density of microfibers is 150-200 dtex. 6. The material according to any one of the previous items, in which, in addition to the microfiber, the material contains a fiber of pure polyamide with a linear density of 38-55 dtex. 7. The material according to any one of the previous items, in which the average pile height is from 10 to 60 95 of the total thickness of the material. 8. The material according to any one of the previous items, in which the average pile height is from 55 to 95 of the total thickness of the material. 9. The material according to any one of the preceding clauses, in which the base material has a loop density of 16-20 loops per centimeter. 10. The material according to any one of the previous items, in which the active substances are encapsulated in liposomes. 25 11. Material according to any one of the previous items, in which the active substances are particles having diameters from 20 to 130 nanometers. 12. The material according to any one of the previous items, in which from 5 to 20 g of active substances per square meter of material is introduced. 13. The material according to any one of the previous items, in which from 9 to 15 g of active substances per square meter of material is introduced. 14. The material according to any one of the previous items, where the material has an area of about 100-300 cm. 15. The material according to any one of the previous items, in which the material has an area of about 190-220 cm. that Z s. 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