KR20110077792A - Method for preparing a cosmetic web and a cosmetic web prepared thereby electrospinning - Google Patents

Abstract

PURPOSE: A method of manufacturing electrospinning skin care web and a skin care web obtained by the same are provided to manufacture a skin care web with high function and high elasticity. CONSTITUTION: The method of manufacturing the skin care web(10) is as follows. A hydrophilic polyurethane web(2) is formed by electrospinning a hydrophilic polyurethane chip and forming a hydrophilic polyurethane nanofiber layer. A hydrophobic poly urethane web(1) electrospins a hydrophobic polyurethane chip and manufactures a material. Beauty liquid is impregnated within the material.

Description

Method for preparing skin beauty web by electrospinning and skin beauty web obtained thereby {Method for Preparing a Cosmetic Web and a Cosmetic Web prepared thus electrospinning}

The present invention relates to a method for producing a skin care web by electrospinning, and to a skin care web obtained thereby. More specifically, the present invention relates to a high-strength skin by sequentially electrospinning a hydrophilic polyurethane and a hydrophobic polyurethane raw material in a timely manner. A method of making a cosmetic web and a skin care web obtained thereby.

In modern society, as interest in appearance increases, women's interest in skin care is increasing rapidly and related products are being actively developed. Products for facial massage called skin beauty web are widely used because they can give various effects such as moisturizing, soothing, aging, removing dead skin cells and wastes, restoring tired skin, enhancing elasticity and whitening in a short time.

Existing mask packs are packaged by cutting them into round or face shapes so that they can be covered with non-woven fabrics, cosmetic films, etc. by impregnating various reviving ingredients such as skin waste removal, wrinkle removal, and whitening effects. Mask packs are already in use, and the demand for these mask packs is increasing significantly because of their simplicity and convenience.

As a conventional mask pack material, nonwoven fabrics of 50 gsm or more in thickness and 200 μm or more in thickness are used. Non-woven fabric is made of felt fiber by arranging synthetic fibers in parallel or negative direction without going through weaving process and combining them with synthetic resin adhesive.The mask pack based on non-woven fabric is a component obtained through chemical process. In addition, since most of the nonwoven fabrics made of fibers such as cellulose, cotton, polyester and the like are not stretchable, the adhesion is further lowered. Recently, a mask pack using a hydrogel has been used to improve this problem, but the price is very expensive and is only applied to expensive products.

Therefore, it is required to develop a mask pack that has excellent adhesion to the skin and enables the continuous action of the cosmetic ingredients, but currently developed mask packs are focused on the development of the cosmetic ingredients contained in the mask pack. The development of the description is not progressing.

The present invention is to overcome the limitations of the prior art as described above, one object of the present invention is to provide a method for producing a skin care web that can produce a highly functional high-strength skin care web.

Another object of the present invention is to provide a skin care web that exhibits high functionality and high elasticity.

Other objects, advantages and novel features of the invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

One embodiment of the present invention for achieving the above object is

Forming a hydrophilic polyurethane web by electrospinning the hydrophilic polyurethane chip to form a hydrophilic polyurethane nanofiber layer;

Preparing a substrate by forming a hydrophobic polyurethane web on the hydrophilic polyurethane web by electrospinning a hydrophobic polyurethane chip with a time difference after forming the hydrophilic polyurethane web; And

It relates to a method for producing a skin care web, comprising the step of impregnating a cosmetic liquid in the substrate.

Another embodiment of the present invention for achieving the above object relates to a highly elastic, high-functional skin care web produced by the method of the present invention.

The skin care web produced by the present invention does not use any chemical components (solvents, adhesives, etc.) other than the polymer material, so it does not cause skin troubles such as allergies, and has multidirectional stretching performance, so that the skin frequently moves. It can stick well without being excited. Furthermore, a hydrophobic polyurethane web is laminated on a hydrophilic polyurethane web capable of supporting a cosmetic ingredient, thereby suppressing evaporation of the cosmetic liquid in which the cosmetic ingredient is dissolved into the air. It keeps your skin moisturized for a long time, allowing cosmetic ingredients to penetrate your skin effectively for a long time.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of related well-known general functions or configurations are omitted.

In the present invention, by applying a voltage to the molten or melted polymer to produce a skin care web by an electrospinning method to obtain a porous nanoweb formed of ultrafine fibers, the adhesive by electrospinning the hydrophilic polymer and the hydrophobic polymer raw material in sequence A highly elastic skin care web sheet having a multilayer structure is prepared.

In the case of producing the skin care web according to the present invention, first, the hydrophilic polyurethane chip is electrospun to form a hydrophilic polyurethane web, and then, after forming the hydrophilic polyurethane web, the hydrophobic polyurethane chip is electrospun after a time difference. A hydrophobic polyurethane web is formed on the hydrophilic polyurethane web to prepare a substrate. Subsequently, a skin beauty web is prepared by impregnating a cosmetic liquid containing various skin active ingredients in the prepared substrate. As described above, the skin beauty web 10 manufactured as described above is made of a hydrophilic web 2 on the side where the skin touches, and is made of a hydrophobic web 1 on the outside thereof to prevent evaporation of the cosmetic liquid. It prevents the skin active ingredient from acting on the skin continuously for a long time, and the elasticity of the omnidirectional is more than 500% so that the web does not separate from the face even if it adheres well to the face and moves.

Polyurethanes used in the present invention can be prepared using known polyurethane reaction techniques. For example, an excess molar amount of organic diisocyanate is reacted with a polyalkylene ether glycol in an amide polar solvent to prepare an intermediate polymer having an isocyanate group at the terminal, and then the intermediate polymer is dissolved in an amide polar solvent and a chain extender is used. A polyurethane polymer can be obtained by making a terminal stop agent react.

In the preparation of the hydrophilic polyurethane prepolymer, the polyether polyols are preferably synthesized in a molar ratio of 0.15 to 0.95 to 1 to 3 moles of isocyanate.

Isocyanates include isophorone diisocyanate, 2,4-toluene diisocyanate and its isomers, diphenylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, trimethylhexamethylene diisocyanate, bis (2-isocyanate ether) -fumarate , 3,3'-dimethyl-4,4'-diphenylmethane diisocyanate, 1,6-hexanediisocyanate, 4,4'-biphenylene diisocyanate, 3,3'-dimethylphenylene diisocyanate, p-phenyl Rendiisocyanate, m-phenylenediisocyanate, 1,5-na

Phthalene diisocyanate, 1, 4- xylene diisocyanate, 1, 3- xylene diisocyanate, etc. can be used, Preferably diphenylmethane diisocyanate, 2, 4- toluene diisocyanate and its isomer, p- Phenylene diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate are preferable.

The polyether polyols have an ethylene oxide / propylene oxide random copolymer having three or more hydroxyl groups in a molecule having a molecular weight of 3,000 to 6,000 and an ethylene oxide content of 50 to 80%, and two or more hydroxyl groups in a molecule and having a molecular weight of 1,000 to A ethylene oxide / propylene oxide random copolymer having a molecular weight of 3,000 to 6,000 and an ethylene oxide content of 50 to 80% having three hydroxyl groups in a molecule, and may be mixed at 30:70 to a weight of 4,000 polypropylene glycol. Alone

It is better to use. However, other isocyanate compounds and polyols not mentioned above may be mixed for controlling physical properties.

Hydrophobic polyurethanes, on the other hand, have a structure in which the calciner is branched, which reacts the polyalkylene oxide with a polyfunctional material, diisocyanate and water, and the end product is capped with a hydrophobic monofunctional active hydrogen containing compound or monoisocyanate. Can be prepared. Hydrophobic groups can be independently selected from the group consisting of alkyl, aryl, arylalkyl, alkenyl, arylalkenyl, alicyclic, perfluoroalkyl, carbosilyl, polycyclyl and composite resins, wherein alkyl, al Kenyl, perfluoroalkyl and carbosilyl hydrophobic groups contain 1-40 carbon atoms and aryl, arylalkyl, arylalkenyl, cycloaliphatic and polycyclyl hydrophobic groups contain 3-40 carbon atoms.

When a hydrophilic and hydrophobic polyurethane chip is prepared, the polyurethane chip is electrospun under voltage applied between the spinneret and the collector to form a polyurethane nanofibrous layer, thereby thinning. By electrospinning, the polyurethane ultrafine elastic fibers are spun onto the collector to form the hydrophilic web 2. The hydrophilic web 2 is electrospun and ultra-fine polyurethane nanofibers are fused into a three-dimensional network at the same time to form a porous skin beauty web. Therefore, even if there is no base material, it can thin into a film form. Electrospinning may include a polymer supply unit for supplying a polyurethane melt, a spinning nozzle for discharging the polymer spinning liquid transferred from the polymer supply unit, a high voltage generator for applying a high voltage to the spinning nozzle, and a collector for collecting fibers discharged from the spinning nozzle. It can carry out by the electrospinning apparatus included.

The multi-layered polyurethane web produced by electrospinning consists of fibers with diameters of hundreds to thousands of nanometers and has more than 500% multidirectional stretching performance.

After the hydrophilic polyurethane web 2 is electrospun, a hydrophobic polyurethane web 1 is formed by electrospinning a hydrophobic polyurethane chip thereon at a predetermined time interval thereon. The electrospinning of the hydrophobic polyurethane web 1 on the hydrophilic polyurethane web 2 is combined with each other even without a separate lamination or bonding process.

Finally, the skin beauty web can be prepared by impregnating a cosmetic liquid containing various cosmetic ingredients on a substrate having a hydrophobic polyurethane web 1 formed on a hydrophilic polyurethane web 2.

The skin care web 10 of the present invention may include various cosmetic ingredients. These cosmetic ingredients can be any ingredient that is good for moisturizing, anti-aging, elasticity. Non-limiting examples of these cosmetic ingredients include retinol, retinyl palmitate, adenosine, polyethoxyl eltidretinamide, arbutin, mulberry extract, licorice, ethyl ascorbyl, ascorbyl glucoside, magnesium ascorbyl phosphate, schizococcal polysaccharide Niacinamide, N-acetylglucosamine, ivy extract, fancy extract, chamomile, soy extract, albumin, green tea solution, collagen, hyaluronic acid; Substances having a whitening effect such as arbutin, vitamin C (ascorbic acid), magnesium ascorbyl phosphate (MAP), and ascorbyl acid 2-glucoside (AA2G); Substances having anti-wrinkle action, such as peoniflorin, kinetin, auxin, peptide, and alpha-hydroxy acid; Or candelilla wax, alpha bisabolol, aloe vera, manjistar, gugal, pine needle extract, collagen extract, grape extract, quince extract, green tea extract, ginkgo extract, seaweed extract, lavender, tea tree, lemon balm, honey, mint , Avocado oil, soybean oil, and the like, but are not necessarily limited thereto.

Cosmetic liquids containing these cosmetic ingredients may be supported in the form of liquids, lotions, creams, gels, multi-lamella emulsion (MLE), or elastic liposomes.

Another aspect of the invention relates to a skin care web produced by the method of the invention. The skin care web of the present invention is characterized by having an elongation of about 500% or more in the same direction in all directions regardless of the orientation of the skin care web, and at the same time, can be stretched. In addition, the skin care web of the present invention is made of microfiber, so it has a soft touch without surface modification, the touch to the skin is good. In addition, since the hydrophobic polyurethane web prevents evaporation of the cosmetic liquid and is not easily dried, the skin active ingredients in the cosmetic liquid penetrate deeply into the user's skin, thereby effectively exerting various cosmetic effects and improving effects for a long time.

The present invention will be described in more detail with reference to the following examples. These examples are intended to illustrate preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to these examples.

Example

Example  One

The polymer used in the preparation of the porous nanoweb was a thermoplastic polyurethane, a hydrophilic polyurethane was used a polyester polyurethane, and a hydrophobic polyurethane was a polyether polyurethane. First, in order to form a hydrophilic part of the skin care web sheet, a polyester-based polyurethane is supplied to a polymer supply unit, and a spinning solution is prepared by applying a temperature of 150 to 300 ° C. to the supplied polyester-based polyurethane chip. When the spinning solution was prepared, a hydrophilic polyurethane web was collected by applying a high voltage of 5 to 30 kV between the spinning nozzle and the fiber collecting unit through which the spinning solution was discharged. The distance from the spinning nozzle to the fiber collection part was 10 to 60 cm and electrospun. When the supply of the hydrophilic polyurethane is stopped, the hydrophobic polyether-based polyurethane is supplied to the supply portion, and a hydrophobic polyurethane fiber is applied to the upper end of the collected hydrophilic polyurethane web by applying a temperature of 150 to 300 ° C. and an electric field of 5 to 30 kV. Spun. The hydrophobic polyurethane web was sequentially collected on the hydrophilic polyurethane web collected in time, and this process was performed continuously so that no separation between two layers occurred.

The cross-sectional SEM photograph of the multidirectional stretchable polyurethane web of the obtained multilayer structure is shown in FIG. 2.

Example  2

The pack was added to the skin care web sheet prepared in Example 1 to evaluate the performance. Hydrogel was applied to the hydrophilic side of the skin care web sheet having both hydrophilicity and hydrophobicity. The hydrophilic hydrogel was effectively penetrated into the portion composed of hydrophilic polyurethane. The hydrophobic cotton composed of hydrophobic polyurethane serves to prevent the applied hydrogel from leaking out. The hydrogel-coated skin beauty web was applied directly to the skin for 30 minutes to evaluate the texture and performance. Due to the multidirectional stretching performance of the polyurethane electrospun web, skin adhesion was excellent. Due to the excellent water carrying ability of the hydrophilic cotton and the perfect air shielding effect of the hydrophobic cotton, the instantaneous performance such as improving the tone of the skin and imparting moisture feeling was excellent. In order to evaluate the multidirectional stretching performance of the obtained skin beauty web, samples were taken in three directions of horizontal, vertical and diagonal lines, and the elongation (%) in each direction was evaluated and shown in FIG. 3.

As can be seen from FIG. 3, in the case of the skin care web according to the method of the present invention, a hydrophobic polyurethane web is formed on a hydrophilic polyurethane web that exhibits high elasticity of 500% or more in all directions and supports cosmetic ingredients. Evaporation of cosmetic ingredients can be prevented.

Although the above has been described in detail with reference to a preferred embodiment of the present invention, this description is merely to describe and disclose an exemplary embodiment of the present invention. Those skilled in the art will readily recognize that various changes, modifications and variations can be made from the above description and the accompanying drawings without departing from the scope and spirit of the invention, and such variations or modifications should be construed as belonging to the claims of the invention. . For example, although the polyurethane has been mainly described above, other polymer materials may be used as long as the polymer material has no cytotoxicity and excellent elasticity.

1 is a schematic view of the wearing state of the skin care web of one embodiment of the present invention and a cross-sectional schematic view of the skin care web.

Figure 2 is a SEM photograph of the multi-layered skin care web obtained in Example 1.

Figure 3 is a graph showing the results of the multi-directional stretch performance evaluation of the skin care web obtained in Example 2.

* Description of the symbols for the main parts of the drawings *

10: skin care web 1: hydrophobic polyurethane web 2: hydrophilic polyurethane web

Claims (6)

Forming a hydrophilic polyurethane web by electrospinning the hydrophilic polyurethane chip to form a hydrophilic polyurethane nanofiber layer; Preparing a substrate by forming a hydrophobic polyurethane web on the hydrophilic polyurethane web by electrospinning a hydrophobic polyurethane chip with a time difference after forming the hydrophilic polyurethane web; And Method for producing a skin care web, characterized in that it comprises the step of impregnating the cosmetic liquid in the substrate. The method of claim 1, wherein the hydrophilic polyurethane chip is a polyol, ethylene oxide / propylene oxide random copolymers having three or more hydroxyl groups in the molecule having a molecular weight of 3,000 ~ 6,000 and an ethylene oxide content of 50 to 80% and two in the molecule Ethylene oxide / propylene having a hydroxyl group of more than 30 to 70 with respect to the weight of polypropylene glycol having a molecular weight of 1,000 ~ 4,000, or having three hydroxyl groups in the molecule and a molecular weight of 3,000 to 6,000 and an ethylene oxide content of 50 to 80% Method for producing a skin care web, characterized in that the polyurethane is prepared using an oxide random copolymer alone. The method of claim 1, wherein the hydrophobic polyurethane chip is prepared by reacting polyalkylene oxide with a polyfunctional material, diisocyanate and water and end capping the resulting product with a hydrophobic monofunctional active hydrogen containing compound or monoisocyanate. Method for producing a skin care web, characterized in that the hydrophobic group is a branched polyurethane produced. The method of claim 1, wherein the electrospinning step is a step of spinning so that the diameter of the polyurethane elastic fiber is 100 ~ 5000nm. According to claim 1, wherein the cosmetic liquid supported on the skin care web is Retinol, retinyl palmitate, adenosine, polyethoxylltretinamide, arbutin, mulberry extract, licorice, ethyl ascorbyl, ascorbyl glucoside, magnesium ascorbyl phosphate, succinic polysaccharide, niacinamide, N-acetylglucosamine, Ivy extract, fancy extract, chamomile, soybean extract, albumin, green tea solution, collagen, hyaluronic acid; Arbutin, vitamin C, magnesium ascorbyl phosphate (MAP), ascorbyl acid 2-glucoside (AA2G), paeoniflorin, kinetin, alpha-hydroxy acid, candelilla wax, alpha bee Savorol, aloe vera, manjistar, gugal, pine needle extract, collagen extract, grape extract, quince extract, green tea extract, ginkgo extract, seaweed extract, lavender, tea tree, lemon balm, honey, peppermint, avocado oil, soybean Method for producing a skin care web, characterized in that it comprises at least one component selected from the group consisting of oil. The skin care web produced by the method of any one of claims 1 to 5.

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