KR20010032671A - Oil cleaning sheets for makeup - Google Patents

Abstract

The present invention has excellent oil absorption, becomes transparent upon oil absorption, so that the oil absorption effect can be clearly assessed to provide a user with sufficient wipe feel and satisfaction, have a pleasant touch, can withstand damage during use, It is to provide a cosmetic oil cleaning sheet which does not need to enclose the granules on the surface. This oil cleaning sheet is composed of a porous stretched film made of plastic material.

Description

OIL CLEANING SHEETS FOR MAKEUP}

Cosmetic oil cleansing sheets are widely known for their use to wipe away oils present on other parts of the face, especially the nose, cheeks, forehead, and eyebrow surfaces, to maintain a clean face and to facilitate the application and diffusion of cosmetics. have. If the makeup is applied over the oil present on the facial surface, the cosmetic material does not adhere properly to the skin, which hinders the diffusion of the material and prevents the full implementation of the cosmetic effect. By using an oil cleaning sheet to wipe off oils typically present on the skin surface after application of the make-up, the additional effect of preventing damage or “oily appearance” of the make-up can occur after applying the make-up.

The most widely used type of oil cleaning sheet among the various oil cleaning sheets can be obtained by making paper from oil absorbent plant fibers such as flax or synthetic pulp. However, sheets made from these paper materials also have the disadvantage that they are highly oil-absorbent while giving great irritation to the skin as a result of the hardness and surface toughness of the fiber materials used. To overcome this irritation problem on the skin, high-compression roller compaction may be carried out during the manufacture of the oil cleaning sheet, or the surface of the paper may be coated with an inorganic powder such as calcium carbonate powder with a sizing agent. However, in the former case, there is still a disadvantage of skin irritation because the fibers pulverized by roll compression rise with time, whereas in the latter case, the surface of the paper is covered with a sizing agent, which inevitably improves oil absorption. It causes the disadvantage of lowering.

Japanese Unexamined Utility Model Publication (Publication) No. 4-45591 aims at solving the problems caused by coating the paper surface with roll pressing and especially with inorganic powder such as calcium carbonate powder during the manufacture of the oil cleaning sheet. A method of adhering porous spherical beads onto the surface of an oil cleaning sheet is disclosed. According to this proposal, the attachment of porous spherical beads provides the effect of absorbing skin oil efficiently.

In addition, Japanese Unexamined Patent Publication (Kokai) No. 6-319644 discloses that paper hardness is 0.7 by adding (B) an inorganic filler to a pulp raw material mainly composed of plant fibers for producing (A) papermaking material to improve skin oil absorption. The method of manufacturing the sheet more than (g / cm <2>) is disclosed.

The oil cleaning sheet produced by the method disclosed in this publication is effective in reducing irritation to the skin during its use. However, improvement of skin oil absorbency using these oil cleaning sheets is limited, and therefore further improvement is desired. These oil cleaning sheets also have the additional problem that the oil absorption state of the skin oil, ie the wiping effect, cannot be easily and accurately evaluated during its use. Difficulty in evaluating the wiping effect means that the user cannot be satisfied by the removal of skin oil from the face. That is, from the user's point of view, it is very important evaluation factor to measure the removal and the amount of removal of skin oil from the user's face when using the oil cleaning sheet, and therefore the satisfaction at the time of applying the makeup greatly depends on this factor.

As mentioned above, there are also known cosmetic oil cleaning sheets which are particularly focused on whether the wiping effect on skin oil can be easily evaluated. For example, Japanese Unexamined Patent Publication No. 56-8606 discloses the preparation of a cosmetic oil cleaning sheet characterized by a mixture of flax fiber and polyolefin resin fibers in an amount of 10 to 70% by weight, and a sheet having a density of 12 to 50 g / cm 2. A method is disclosed. Since these oil cleaning sheets have a structure having transparent pseudo polyolefin fibers mixed with opaque flax fibers, the opaque flax fibers before use have a transparent similarity upon absorption of the oil, making it possible to reliably evaluate the skin oil wiping effect.

In addition, Japanese Unexamined Utility Model Publication (Publication) No. 5-18392 adds inorganic or organic fine particles such as clay particles, fine silica particles, fiber powders, etc. to oil cleaning paper to form a flat portion on the surface of the oil cleaning paper. An oil cleaning sheet is disclosed. Since these oil cleaning sheets contain particles in the gaps between the fibers of the oil cleaning paper, the skin oil wets the entire oil cleaning sheet while filling the gap between the paper fibers and the particles, making the oil cleaning paper more transparent. Creating effect, giving the user a "satisfaction with skin oil removed".

However, the two types of oil cleaning sheets described above show a certain degree of the transparent effect by oil absorption and thus the evaluation of oil absorption, but with disadvantages they show a decrease in the amount of oil absorption, which is the most important aspect for the oil cleaning sheet. It is difficult to obtain complete transparency of the oil cleaning sheet at the time of oil absorption. After all, there is still a need for oil cleaning sheets with a much higher oil absorption, which may be transparent to give the user sufficient satisfaction.

Another problem common to conventional oil cleaning sheets is that they are made from paper types made as thin paper from fibrous materials, and therefore tend to be easily damaged when a user needs to use them to wipe skin oil from the face and replace it immediately. Is there. Due to the high cost of commercially available oil cleaning sheets, it is desirable to provide a tougher oil cleaning sheet that does not require such an immediate replacement.

In addition to the above problems, the prior art oil cleaning sheet presents another problem in summer and in air conditioning chambers under very high temperatures, because under such conditions the oil cleaning sheet is insufficient to completely remove the sweat from the face. Unremoved sweat also results in insufficient suitability and adhesion of the cosmetic material to the skin, since the sweat contains skin oil dissolved therein. Therefore, it is desirable to provide an oil cleaning sheet having excellent absorption of sweat-containing liquid in addition to excellent oil absorption and other advantages.

The present invention relates to a cosmetic oil cleaning sheet, and more particularly, to a strip-type oil cleaning sheet for use for wiping skin oil (sebum) present on the face. The oil cleaning sheet of the present invention has excellent oil absorption, makes it easy to evaluate the condition of the oil at the time of makeup, and hardly causes skin irritation, while its face cleaning effect is excellent to facilitate the application and diffusion of cosmetics. Let's do it.

In addition to the excellent absorbency of skin oils, the excellent transparency and toughness effective in knowing the oil absorption level, the oil cleaning sheet of the present invention can absorb a large amount of skin oil and sweat dissolved on the face because its surface has good hydrophilicity. have.

The present invention has been made in consideration of a number of problems with the aforementioned conventional cosmetic oil cleaning sheet, the object of which is to have excellent oil absorption, to withstand damage during use, and to be transparent at the time of oil absorption, thereby absorbing oil It is to provide an improved cosmetic oil cleaning sheet that can be clearly evaluated to provide a user with sufficient wipe feel and satisfaction, have a pleasant touch, and do not need to encapsulate the particulate on the surface for improved properties.

Another object of the present invention, in addition to ensuring the excellent absorbency of skin oil, excellent transparency and toughness that can indicate the level of oil absorption, it can absorb a lot of sweat and skin oil dissolved in sweat, etc. It is to provide an improved cosmetic oil cleaning sheet.

According to the present invention, the above object can be achieved by a cosmetic oil cleaning sheet characterized by including a porous stretched film made of a plastic material.

The porosity of the void volume per unit area of the stretched film made of a plastic material as a component of the cosmetic oil cleaning sheet according to the present invention is preferably in the range of 0.0001 to 0.005 cm 3 calculated by the following equation:

Gap volume per unit area = [film thickness (cm) x 1 (cm) x 1 (cm) x pore content (%)] / 100 (pore content is the proportion of pores in the porous film).

"Pore content" is more specifically defined as the ratio of the amount of filler when all the pores of a porous film are filled with a material of the same composition as the film with respect to the film without corresponding pores.

The pore content of the porous stretched film is preferably in the range of 5 to 50%, and the film thickness is preferably in the range of 5 to 200 m.

In addition, in the oil cleaning sheet of the present invention, it is preferable that at least one surface of the porous stretched film contains a hydrophilic liquid absorbent material at least partially distributed on the surface.

The distribution of liquid absorbent material on the film surface can be provided at any desired step during the preparation of the stretched film. The liquid absorbent material is preferably distributed on the surface of the stretched film by coating the material after preparation of the film. On the other hand, it is preferable that the liquid absorbent material be incorporated into the stretched film during its manufacture, so that the material is at least partially exposed to the surface of the film to obtain the desired functions and effects. Liquid absorbent materials can be incorporated, for example, into raw materials or mixtures of films or into intermediate products of films.

In the stretched film having the liquid absorbent material distributed therein, the stretched film preferably has a liquid absorbing capacity of 0.00003 to 0.005 cm 3 in terms of the amount of water absorbed per unit area. It is preferable that the aqueous solution of the liquid absorbent material distributed on the stretched film surface is 15.0-36.0 dyn / cm in surface tension.

The cosmetic oil cleaning sheet according to the present invention is characterized by using a plastic material as opposed to a paper material such as that used for a conventional oil cleaning sheet as a paper body to produce a porous stretched film from the material. The porous stretched film of the present invention can be produced by various different methods using a plastic material as a starting material, but a plastic film is prepared by adding a filler to a highly transparent crystalline thermoplastic resin as a starting material for producing a film, and then It is preferable to manufacture by extending | stretching and filling the internal micro void.

The porous stretched plastic film obtained in this way has a larger proportion of voids constituting the volume of the sheet compared to conventional oil cleaning sheets, and thus the film shows excellent absorption of skin oil upon skin absorption per unit area. . In addition, since the plastic film has a structure with a uniform content of a number of fine pores, it appears opaque due to light dispersion before wiping the skin oil from the skin surface, but after oil absorption, the oil fills each pore so that the light dispersion To prevent or reduce the oil, and this makes it possible to clearly evaluate the oil absorption effect with the inherent transparency of the film body.

Preferred examples of the highly transparent crystalline thermoplastic resin intended to be used as the main starting material for producing the porous non-stretched plastic film of the present invention include high density polyethylene, polypropylene, polybutylene, poly-4-methylpentene and ethylene-propylene. Block copolymers include, but are not limited to, modified polypropylenes, which are ideal for film production because of their melt strength.

Examples of preferred fillers for use with the aforementioned thermoplastic resins to provide micro voids (since they exhibit transparency upon oil absorption) include mineral oil, glycerin, petroleum jelly, low molecular weight polyethylene, polyethylene oxide, polypropylene oxide, polyoxide Tetramethylene, soft carbowax and mixtures thereof, but is not limited thereto. Among these fillers, mineral oil is preferred because of its relatively low cost.

The above-mentioned fillers can be used in a wide range in the starting materials used for film production. The amount of filler to be used is preferably in the range of 20 to 60% by weight of the starting material, more preferably 25 to 40% by weight. If the amount of filler to be added to the starting material is 20% by weight or less, the pore content of the resulting film after stretching is reduced to lower the oil absorption, while if the amount is more than 60% by weight, it is more preferable to prepare the film. It becomes difficult, and only a fragile film can be obtained.

In addition to the thermoplastic resin and the filler, other additives may be added to the starting material for producing a porous stretched plastic film, as necessary. For example, organic acids and organic alcohols such as carboxylic acids, sulfonic acids and phosphonic acids can be added. Further suitable additives include, for example, inorganic and organic pigments, fragrances, surfactants, antistatic agents and the like.

The main starting material and optional additives are melted and blended to form a film while producing a filler containing plastic film. The melting and mixing step and the subsequent film forming step can be carried out according to a conventional method. Examples of suitable melt mixing methods are kneading methods using a kneader, and examples of suitable film forming methods are expansion methods and casting methods. The expansion method can provide a tubular film, for example, by melt mixing a main starting material or the like and then expanding from a circular mold. The casting method can provide a film by melt mixing the main starting material or the like and then extruding it from the mold on a cooling roll (cold roll). In a variant of this casting method, the additive can be removed by washing with a suitable solvent after extrusion of the melt mixture on a cooling roll.

The molded plastic film is stretched to provide micro voids in the film. In the case of film formation, the stretching may be carried out according to conventional methods such as uniaxial stretching or biaxial stretching. For example, in the case of biaxial stretching, the stretching in the longitudinal direction can be performed by changing the speed of the drive roll, and the stretching in the width direction can be performed by mechanically pulling in the width direction while maintaining both ends of the film in the chuck.

Film stretching conditions are not particularly limited, but the stretching is preferably performed to provide a pore content in the range of 5 to 50% and a stretched film thickness of 5 to 200 m. If the pore content at the time of stretching of the film is 5% or less, the oil absorption amount is reduced, while if the content is more than 50%, the oil absorption amount is too large, making it difficult to clearly evaluate the oil absorption effect. In addition, if the film thickness is 5 μm or less, the oil absorption amount is too small, and the film adheres to the face area where the oil does not need to be removed, making it more difficult to handle, while the oil absorption amount when the thickness exceeds 200 μm Will be too many.

It is preferable that the draw ratio with respect to a plastic film is the range of 1.5-3.0 normally. If the draw ratio is 1.5 or less, it becomes impossible to obtain a sufficient pore content for oil absorption, whereas when the ratio exceeds 3.0, the pore content is too large to cause too much oil absorption.

As for the size of the space | gap formed by extending | stretching of a film, the range of 0.2-5 micrometers is preferable normally. If the pore size is 0.2 μm or less, it becomes impossible to absorb sufficient skin oil to obtain clearness, while if the size exceeds 5 μm, the oil absorption will be too much.

As described above, the gap volume per unit area of the porous stretched plastic film obtained by the stretching method is preferably in the range of 0.0001 to 0.005 cm 3, more preferably in the range of 0.0002 to 0.001 cm 3. If the gap volume of the film is 0.0001 cm 3 or less, it becomes difficult for the user to hold the oil cleaning sheet, while if the volume exceeds 0.005 cm 3, the oil absorption amount is too large, and the oil absorption effect becomes difficult to clearly evaluate.

As mentioned above, the cosmetic oil cleaning sheet of the present invention can provide a number of advantages such as excellent absorbency of skin oil, excellent transparency and toughness that can easily confirm oil absorption. However, since it is made of a plastic material, when compared with the oil cleaning sheet of the prior art made of paper, the oil cleaning sheet of the present invention has a difficulty in effectively absorbing an aqueous liquid such as sweat. As a result of enthusiastic experiments, the inventors have found that poor sweat absorption is mainly due to the hydrophobic surface of the plastic film, and therefore, when hydrophilicity is given to the plastic film, it easily absorbs sweat on the face and skin oil dissolved in the sweat.

That is, according to one preferred embodiment of the present invention, a cosmetic oil cleaning sheet having excellent hydrophilicity is provided wherein at least one surface of the porous stretched film contains a hydrophilic liquid absorbent material at least partially distributed thereon.

The distribution of the hydrophilic liquid absorbent material in the hydrophilic oil cleaning sheet of the present invention is generally such that fine particles of the liquid absorbent material are dispersed substantially uniformly on the surface of the porous stretched film. In addition, a number of different methods may be used to apply the liquid absorbent material to the film surface, and the liquid absorbent material may be contained in the film as needed. In addition, if the oil cleaning sheet makes use of a single surface of the stretched film, or if the material can be distributed on both surfaces of the stretched film, the liquid absorbent material can be distributed only on that single surface of the stretched film.

Application of the liquid absorbent material to the stretched film can be performed using different methods. For example, after the preparation of the stretched film, it is advantageous that the liquid absorbent material can be applied to the film surface using a coating method. According to this coating method, after the liquid absorbent material is dissolved in a suitable solvent, the resulting coating solution is coated to a thinner thickness on one or both surfaces of the stretched film, and then the coating is dried to remove the solvent to remove the desired hydrophilic oil. A cleaning sheet can be obtained.

Hydrophilic liquid absorbent materials which can advantageously be used in the practice of the present invention are not limited to specific materials as long as they can provide the expected functions and effects, but surface active agents are preferred. It is necessary in the present invention to reduce the surface tension of the liquid droplets as a function of the inclusion of liquid absorbent material in the liquid droplets and to meet the above requirements when wiping a liquid such as facial sweat with an oil cleaning sheet. This is because the presence of a substance capable of exhibiting high surface activity, ie, a surface active agent, is effective. In this regard, as described above, a wide range of additives may be added to the starting material during the manufacture of the plastic film, a typical example of which is a surface active agent, in which case the surface active agent is used to provide good hydrophilicity to the film surface. Rather, to aid in good dispersion of the starting material in the kneading step.

Suitable surface active agents as hydrophilic liquid absorbent materials include, but are not limited to:

<Anionic surface active agent>

Esters of alkyl sulfuric acid, alkylbenzenesulfonates, esters of polyoxyethylene alkyl phosphoric acid, and the like;

<Nonionic surface active agent 9>

Polyoxyethylene alkyl ethers, esters of sorbitan aliphatic acids, and the like;

<Cationic surface active agent>

Alkylamine salts, quaternary ammonium salts, and the like; And

<Hydrophilic polymer>

Polyvinyl alcohol, polyethylene glycol, polypropylene glycol, and the like.

Among the surface active agents mentioned above, esters of sorbitan fatty acids, usually sorbitan monolaurate, can be used particularly advantageous because they possess good ability to provide hydrophilicity to the film surface with safety to the skin. .

When preparing the coating solution using a hydrophilic liquid absorbent material, suitable solvents include, but are not limited to, isopropyl alcohol, ethanol, water, methylethylketone, toluene, ethyl acetate, heptane, and the like. Among these solvents, isopropyl alcohol can be particularly useful because the liquid absorbent material can be dissolved with high solubility with high voltage of isopropyl alcohol.

The concentration of the liquid absorbent material in the coating solution can vary widely depending on the type or surface activity, the desired effect and other factors of the surface active agent used. Generally, the concentration of the liquid absorbent material is preferably an amount sufficient to allow the stretched film to have a liquid absorbing capacity of 0.00003 to 0.005 cm 3 in terms of the amount of water absorbed per unit area. Liquid absorbing ability outside the above range does not exhibit sufficient sweat absorbing effect on the resulting oil cleaning sheet. It should be noted that the above preferred range of liquid absorption capacity can similarly be applied to all oil cleaning sheets of the present invention.

In addition, the aqueous solution of the liquid absorbent material distributed on the stretched film surface preferably has a surface tension of 15.0 ~ 36.0 dyn / cm. Surface tension outside of the aforementioned ranges does not exhibit sufficient sweat absorption effect on the resulting oil cleaning sheet, and does not indicate the effective availability of the transparency provided to the oil cleaning sheet as a result of sweat absorption and oil cleaning for evaluation of such effect levels. I can't.

In coating the coating solution on the stretched film of the coating solution, the coating operation can be carried out according to a conventional method. Examples of such coating methods are gravure coating, flexographic coating, screen coating, dip coating and spray coating. The range of application of the coating solution on the stretched film surface can vary widely depending on the type and surface activity, the desired effect and other factors of the liquid absorbent material used, and generally its sufficient range is about 0.1-3 g / m 2. .

In the production of the oil cleaning sheet of the present invention, an incorporation method of incorporating a liquid absorbent material into the stretched film during its production may be used instead of the above coating method. For example, when melting and mixing starting materials such as thermoplastics, fillers, organic nucleating agents and the like in the production of stretched films, the liquid absorbent material may be mixed at any desired time to produce the desired hydrophilic oil cleaning sheet. . In this method, it is also possible to use the liquid absorbent material described in the above paragraph concerning the application of the liquid absorbent material by coating, and the amount of the liquid absorbent material to be incorporated is suitably an amount sufficient to obtain the above-mentioned liquid absorbent capacity. For this application method, among the many usable liquid absorbent materials, diethanol amide laurate and the like can be used in particular because they have good resistance to heat and good hydrophilicity.

The invention is not described in further detail by the examples. In the examples below, the term "parts" means "parts by weight", unless otherwise specified. It should be understood that the present invention is not limited to these examples in any way.

Example 1

The following starting materials were melt mixed in the amounts indicated.

Polypropylene resin (commercially available from Union Carbide Company under the trade name "5D45"); 63.3 parts

Mineral oil (commercially available from Amoco Oil & Chemical Company under the trade name “White Mineral Oil # 31”); 34.0 parts

Organic nucleating agents (commercially available from Hoechst Celanese under the trade name "Blue P-526"); 2.75 parts.

The melt mixture was cast from a extrusion mold onto a cold roll to form a film. The produced film was biaxially stretched (180% in length direction and 180% in width direction). A porous stretched plastic film with the following properties was obtained.

Film thickness 0.0035 cm

Pore content 25%

Gap volume per unit area 0.000875 cm 3.

The resulting porous film was cut into rectangles 9 cm long by 6 cm wide and quality evaluations were carried out according to the following methods in terms of (1) oil absorption, (2) transparency after use, and (3) touch of the film.

(1) evaluation of oil absorption

After measuring the weight (mg) of the test film, it was impregnated with commercial mineral oil. After standing for 1 minute, the residual oil on the film surface was wiped off with a paper towel and the weight (mg) of the test film was measured again. The weight change of the film due to the impregnation of mineral oil was used to measure the absorption amount per unit area (mg / cm 2) and theoretical absorption amount (absorption amount when all gaps in the film were filled with mineral oil, mg / cm 2).

(2) transparency after use

The test film was used as a cosmetic oil cleaning sheet in a 20 panelist monitoring test. After use, a film with very good transparency is judged as good (Θ), a film with good transparency is good (O), a film with acceptable transparency is moderate, a hard film with inferior touch It was determined as defective (x).

Each result of the evaluation test is as follows.

Film weight (before oil absorption) 121 mg Film weight (after oil absorption) 174 mg Weight change (increase) 53 mg Oil absorption per unit area 0.98 mg / ㎠ Theoretical absorption 0.73 mg / ㎠ Transparency after use Excellent (Θ) touch Excellent (Θ)

As the above results demonstrate, the porous stretched plastic film of this example was very suitable as a cosmetic oil cleaning sheet. There was no tear of the film during the evaluation test.

Example 2

The method described in Example 1 was repeated. However, for this example, the following starting materials were melt mixed in the indicated amounts.

Polypropylene resin (commercially available from Union Carbide Company under the trade name "SD45") 62.0 parts Mineral oil (commercially available from Amoco Oil & Chemical Company under the trade name "White Mineral Oil # 31") 35.0 parts Pigment (commercially available from PMS Consolidate Company under the trade name "18P805 Blue Pigment") 3.0 parts Organic nucleating agent (commercially available from Milliken Chemical Company under the trade name "Millard 3905") 0.08 parts

In this example, the porous stretched plastic film was prepared using the expansion method instead of the casting method of Example 1, and the tubular film was prepared by expanding the molten mixture from the circular mold and then cutting into two sheet-like films. Each resulting film was uniaxially stretched (160% in the length direction).

Characteristics and evaluation test results of the resulting porous stretched plastic film are as follows.

Film thickness 0.0035 cm

20% pore content

Clearance volume per unit area 0.0007 cm 3

Film weight (before oil absorption) 172 mg

Film weight (after oil absorption) 211 mg

Weight change amount (increase) 39 mg

Oil absorption per unit area 0.72 mg / ㎠

Theoretical absorption 0.59 mg / ㎠

Excellent transparency after use (ⓒ)

Excellent touch (ⓡ)

As the above results demonstrate, the porous stretched plastic film of this example was very suitable as a cosmetic oil cleaning sheet. There was no tear of the film during the evaluation test.

Example 3

The method described in Example 1 was repeated. However, for this example, the following starting materials were melt mixed in the indicated amounts.

Polypropylene resin (commercially available from Union Carbide Company under the trade name "DX5E98") 79.0 parts Mineral oil (commercially available from Amoco Oil & Chemical Company under the trade name "White Mineral Oil # 31") 21.0 parts Organic nucleating agent (commercially available from Milliken Chemical Company under the trade name "Millard 3905") 0.09 parts

In this example, the porous stretched plastic film was prepared using the expansion method instead of the casting method of Example 1, and the tubular film was prepared by expanding the molten mixture from the circular mold and then cutting into two sheet-like films. Each resulting film was uniaxially stretched (160% in the length direction).

Characteristics and evaluation test results of the resulting porous stretched plastic film are as follows.

Film thickness 0.0075 cm

20% pore content

Clearance volume per unit area 0.0015 cm 3

Film weight (before oil absorption) 281 mg

Film weight (after oil absorption) 338 mg

Weight change amount (increase) 57 mg

Oil absorption amount per unit area 1.06 mg / ㎠

Theoretical absorption 1.26mg / ㎠

Transparency after use Normal

Feel good (O)

As the above results demonstrate, the porous stretched plastic film of this example can be used as a cosmetic oil cleaning sheet, but its properties were inferior to those of the films of Examples 1 and 2 above. There was no tear of the film during the evaluation test.

Example 4

This example was performed as a comparative example.

The method described in Example 1 was repeated. In this example, however, the following starting materials were melt mixed in the indicated amounts for comparison.

Polyethylene resins (commercially available from Pina Oil & Chemical Company under the trade name “Pina 1285”); 38.0 parts

Mineral oil (available under the trade name "Witco protol" by Witco Company); 62.0 parts.

In this example, the porous stretched plastic film was prepared using the modified casting method instead of the casting method of Example 1. Specifically, the film was prepared by casting a molten mixture from an extrusion die onto a cold roll and then dissolving the mineral oil with an organic solvent. The resulting film was biaxially stretched (240% in the length direction, 280% in the width direction).

Characteristics and evaluation test results of the resulting porous stretched plastic film are as follows.

Film thickness 0.005 cm

Pore content 75%

Clearance volume per unit area 0.004 cm 3

Film weight (before oil absorption) 65 mg

Film weight (after oil absorption) 269 mg

Weight change amount (increase) 204 mg

Oil absorption amount per unit area 3.78 mg / ㎠

Theoretical absorption 3.14 ㎎ / ㎠

Transparency after use Normal

Feel good (O)

As the above results demonstrate, the porous stretched plastic film of this example can be used as a cosmetic oil cleaning sheet, but its properties were inferior to those of the films of Examples 1 and 2 above.

Example 5

This example was performed as a comparative example.

The method described in Example 1 was repeated. In this example, however, the following starting materials were melt mixed in the indicated amounts for comparison.

Polypropylene resin (commercially available from Shell Chemical Company under the trade name "DS SD45") 30.0 parts Mineral oil (commercially available from Amoco Oil & Chemical Company under the trade name "White Mineral Oil # 31") 70.0 parts Organic nucleating agent (commercially available from Milliken Chemical Company under the trade name "Millard 3905") 0.08 parts

In this example, the porous stretched plastic film was prepared using the modified casting method instead of the casting method of Example 1. Specifically, the film was prepared by casting a molten mixture from an extrusion die onto a cold roll and then dissolving the mineral oil with an organic solvent. The resulting film was biaxially stretched (180% in the length direction and 270% in the width direction).

Characteristics and evaluation test results of the resulting porous stretched plastic film are as follows.

Film thickness 0.011 cm

Void content 84%

Clearance volume per unit area 0.00924 cm 3

90 mg of film weight (before oil absorption)

Film weight (after oil absorption) 550 mg

Weight change amount (increase) 460 mg

Oil absorption amount per unit area 3.52 mg / ㎠

Theoretical absorption 7.74 ㎎ / ㎠

Transparency after use Medium (x)

Feel good (O)

As the above results demonstrate, the porous stretched plastic film of this example can be used as a cosmetic oil cleaning sheet, but the evaluation of the effect is very difficult, and its properties are inferior to those of the films of Examples 1 and 2 above. .

Example 6

This example was performed as a reference example.

For reference, three different cosmetic oil cleaning sheets (commercially available) described below were provided for quality evaluation by the method described in Example 1. Characteristics and Evaluation Tests of Cosmetic Oil Cleaning Sheets The results of each test are as follows.

Why. Company's cosmetic oil cleaning sheet (sheet embossed with gold leaf)

Sheet thickness 0.0052 cm

Pore Content-

Clearance volume per unit area-

121 mg of film weight (before oil absorption)

Film weight (after oil absorption) 136 mg

Weight change amount (increase) 15 mg

Oil absorption amount per unit area 0.27 mg / ㎠

Theoretical absorption-

Good transparency after use (O)

Feel normal

K. Company's cosmetic oil cleaning sheet (natural plant fiber)

Sheet thickness 0.0025 cm

Pore Content-

Clearance volume per unit area-

Film weight (before oil absorption) 86 mg

Film weight (after oil absorption) 104 mg

Weight change amount (increase) 18 mg

Oil absorption per unit area 0.33 mg / ㎠

Theoretical absorption-

Good transparency after use (O)

Feel normal (O)

s. Company's Cosmetic Oil Cleansing Sheets (100% Natural Pulp Containing Natural Manila Flax)

Sheet thickness 0.0002 cm

Pore Content-

Clearance volume per unit area-

83 mg of film weight (before oil absorption)

Film weight (after oil absorption) 100 mg

Weight change amount (increase) 17 mg

Oil absorption per unit area 0.31 mg / ㎠

Theoretical absorption-

Good transparency after use (O)

Feel normal (O)

As the above results prove, the cosmetic oil cleaning sheet of this example tested for reference can be used as the cosmetic oil cleaning sheet, but the property was inferior to that of the films of Examples 1 and 2 above.

Example 7

The starting material was then melt mixed in the indicated amounts.

Polypropylene resin (commercially available from Union Carbide Company under the trade name "SD45") 36.3 parts Mineral oil (commercially available from Amoco Oil & Chemical Company under the trade name "White Mineral Oil # 31") 34.0 parts Organic nucleating agent (commercially available from Hoechst Celanese under the trade name "Blue P-526") 2.75 parts

The melt mixture was cast from a extrusion mold onto a cold roll to form a film. The resulting film was biaxially stretched (180% in the length direction and 180% in the width direction). A porous stretched plastic film was obtained.

Next, the surface active agent "LeodolSuper L-10 (F)", available from Khao Company, was dissolved in isopropyl alcohol to prepare a coating solution containing 5% by weight of surface active agent. The obtained coating solution was coated and dried on the porous film surface prepared in the above step using a gravure roll coater (180 lines). The coated porous film had the following properties.

Film thickness 0.0035 cm

Pore content 25%

Clearance volume per unit area 0.000875 cm 3

The resulting porous film was cut into rectangles of length 9 cm x width 6 cm, and quality evaluation was performed in accordance with the following methods for (1) oil absorption and (2) water absorption.

(1) evaluation of oil absorption

After measuring the weight (mg) of the test film, it was impregnated with commercial mineral oil. After standing for 1 minute, the residual oil on the film surface was wiped off with a paper towel and the weight (mg) of the test film was measured again. The oil uptake (cm 3 / cm 2) per unit area was measured using the weight change of the film due to the impregnation of mineral oil.

(2) Evaluation of water absorption

After the weight (mg) of the test film was measured, it was impregnated with tap water. After standing for 1 minute, the residue on the film surface was wiped off with a paper towel and the weight (mg) of the test film was measured again. The water uptake per unit area (cm 3 / cm 2) was measured using the weight change of the film due to the impregnation of tap water.

The results of the evaluation test are summarized in Table 1 below.

Example 8

The method described in Example 7 was repeated. However, for this example, the following starting materials were melt mixed in the indicated amounts.

Polypropylene resin (commercially available from Union Carbide Company under the trade name "SD45") 58.0 parts Mineral oil (commercially available from Amoco Oil & Chemical Company under the trade name "White Mineral Oil # 31") 35.0 parts Organic nucleating agent (commercially available from Hoechst Celanese under the trade name "Blue P-526") 5.0 parts Surface active agent (commercially available from Guest Celanese under the trade name "Hostarstart System E5952") 2.0 parts

Evaluation test results are summarized in Table 1 below.

Example 7 Example 8 Reference Example Film thickness 35 μm 35 μm 25 μm Pore content 25% 20% - Gap volume per unit area 0.000875 cm 3 0.0007 cm 3 - Oil absorption amount per unit area (cm 3 / ㎠) 0.00106 0.0096 0.00032 Water absorption amount per unit area (cm 3 / cm 2) 0.00092 0.00078 0.00038

In Table 1, "Reference Example" shows the result obtained when the oil cleaning sheet (sheet embossed with gold leaf) manufactured by Y Y Co., Ltd. was subjected to the evaluation test according to the method described in Example 7. As can be understood from the results of Table 1, the oil cleaning sheet according to the present invention having a hydrophilic surface can exhibit excellent function compared to the conventional oil cleaning sheet in both oil absorption amount and water absorption amount (sweat absorption amount).

Example 9

The method described in Example 7 was repeated. However, for this example, in order to study the effect of the surface active agent on oil absorption and water absorption (sweat absorption), different surface active agents such as chemical names and trade names described in Table 2 below in the same amount as in Example 7 To prepare an oil cleaning sheet. In addition, a commercial microporous film (untreated) and a commercial oil cleaning sheet (sheet embossed with gold foil) manufactured by Y. Co., Ltd. were also used for comparison purposes. The surface tension (dyn / cm) of each coating solution in which the surface active agent is dissolved therein and the HLB value (hydrophilic-lipophilic balance) of each surface active agent are also shown in Table 2.

As a result of the evaluation test made according to the method described in Example 7, the results summarized in Table 2 below were obtained. In Table 2, the oil absorption amount means the oil absorption amount (cm 3 / cm 2) per unit area, and the water absorption amount means the water absorption amount (cm 3 / cm 2) per unit area. In addition, after foil absorption and after water absorption, each oil cleaning sheet visually observes the color change, and the color change is "good" (good change), "good" (good change) and "bad" (bad change). Classified as The results are summarized in Table 2 below.

Surface active agent HLB Oil absorption Water absorption Color variations Surface tension (dyn / cm) Chemical name Trade name After oil absorption After water absorption Sorbitan monooleate Leodoll SP-010 4.3 0.00115 0.00080 Bad 29.6 * Sorbitan monostearate Leodoll Super SP-S10 4.7 0.00106 0.00002 Great Bad 37.1 Sorbitan monostearate Leodoll super SP-L10 8.6 0.00122 0.00092 Great Great 29.1 Polyoxyethylene lauryl ether Emulgen 105 9.7 0.00113 0.00085 Great Great 26.8 Polyoxyethylene lauryl ether Emulgen 109P 13.6 0.00088 0.00085 Great Great 31.8 Polyoxymethylene sorbitan monolaurate Leodoll Super TW-L12 16.7 0.00112 0.00094 Great Great 35.8 Polyoxyethylene octoylphenyl ether Emulgen 840S 17.9 0.00111 0.00018 Great Bad 46.0 Polyethylene Glycol Distearate EMENON 3299R 19.2 0.00125 0.00000 Great Bad 48.9 Aluminum Lauryl Sulfate Emulsion AD-25R - 0.00110 0.00080 Great Great 32.3 Sodium dodecylbenzene sulfonate Neopelex F-25 - 0.00120 0.00088 Great Great 35.9 Lauryl Bittain Anitol 24B - 0.00113 0.00074 Great Great 31.5 Microporous Film (Untreated) - 0.00116 0.00000 Great Bad - Y Company's Oil Cleaning Sheet - 0.00032 0.00038 Good Good -

The evaluation results shown in Table 2 show that if the used surfactant is outside the scope of the present invention, excellent oil absorption and water absorption (sweat absorption) desirable for the present invention cannot be obtained, and the result is that the surface tension of the used surfactant is It can be changed mainly depending on. Referring to the data of the surface tension of Table 2, it is evident that the surface tension of the aqueous solution of the surface active agent is preferably 36 dyn / cm or less for obtaining the desired oil absorption and water absorption (sweat absorption).

As described above, according to the present invention, when the cosmetic oil cleaning sheet is provided in the form of a film that causes absorption of oil present on the face, the porous oil cleaning sheet is not made of a conventional fibrous material paper. Consists of a film; Therefore, it is possible to realize large absorption of oil, to clearly evaluate the absorption effect based on the excellent transparency of the oil absorption area, and thus to provide the user with a sufficient wiping touch and satisfaction, while the sheet has a pleasant touch It can withstand damage during use and does not require the inclusion of particulates on the surface for improved properties.

In addition, according to the present invention, since hydrophilicity is provided on the surface of the porous film of plastic material, in addition to the above effects such as excellent absorbency of skin oil, excellent transparency and toughness indicating easy confirmation of oil absorption, sweat and sweat on the face The significant effect is that a large amount of skin oil dissolved in can be absorbed into the oil cleaning sheet. The sweat absorption effect is especially important in summer, when significant sweating is inevitable. Using the oil cleaning sheet of the present invention, it is possible to effectively prevent undesirable adhesion of the sheet to the skin to completely remove the sweat from the face, as well as to remove the discomfort. In addition, since the surface active agent can also act as an antistatic agent, the used oil cleaning sheet can be disposed of without the disadvantages associated with adhesion to the hand.

Claims (8)

A cosmetic oil cleaning sheet comprising a porous stretched film made of a plastic material. The cosmetic oil cleaning sheet according to claim 1, wherein the void volume per unit area of the porous stretched film is in the range of 0.0001 to 0.005 cm 3, calculated by the following equation: Gap volume per unit area = [film thickness (cm) x 1 (cm) x 1 (cm) x pore content (%)]] / 100 (pore content is the proportion of pores in the porous film). The cosmetic oil cleaning sheet according to claim 1 or 2, wherein the pore content of the porous stretched film is in the range of 5 to 50%, and the film thickness is in the range of 5 to 200 µm. The cosmetic oil cleaning sheet of claim 1, wherein at least one surface of the porous stretched film contains a hydrophilic liquid absorbent material at least partially distributed thereon. 5. The cosmetic oil cleaning sheet according to claim 4, wherein the liquid absorbent material is distributed on the stretched film surface by coating after the stretched film is manufactured. 5. The cosmetic oil cleaning sheet of claim 4, wherein the liquid absorbent material is incorporated into the film during preparation of the stretched film such that the material is at least partially exposed to the film surface. The cosmetic oil cleaning sheet according to any one of claims 4 to 6, wherein the porous stretched film has a liquid absorbing capacity of 0.00003 to 0.005 cm 3 in terms of the amount of water absorbed per unit area. The cosmetic oil cleaning sheet according to any one of claims 4 to 7, wherein the aqueous solution of the liquid absorbent substance has a surface tension of 15.0 to 36.0 dyn / cm.