JPH03286726A - Wiping cloth for makeup - Google Patents

Abstract

PURPOSE:To obtain the wiping cloth which is excellent in oil sbsorbing speed, oil absorbing property, oil holding property and oil conformability, has a soft and excellent feel, and also, has sufficient strength for practical use by using a nonwoven sheet to which polyolefine extra fine fibers of a specific average fiber diameter are joined partially. CONSTITUTION:The average fiber diameter of polyolefine fibers to be used is 0.5-6mum, and 1.0-5.0mum desirably. Also, the METSUKE amount of a nonwoven sheet to be used is 10-50g/m<2>, and 15-30g/m<2> desirably. In this regard, as for extra fine fibers for constituting the nonwoven sheet, it is necessary to join them partially. By this junction, strength of the nonwoven sheet is enhanced, a tear, a crack, layer peeling, etc., are prevented, and sufficient strength as wiping cloth is given. As for this partial junction, methods for the junction by an adhesive agent, or confounding the fibers by a needle punch, a water flow, etc., are available, but it is desirable to make the cloth into a sheet form by partial heat adhesion in order to further enhance strength of the sheet, permeability and flexibility.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cosmetic wiping cloth used for wiping off lipstick, cosmetics, oil, etc. that stand out on the skin of the face and the like.

[Conventional technology]

Conventionally, papers made of vegetable fibers such as cellulose and pulp have often been used as this type of wiping cloth. However, since these cosmetic oil-absorbing papers are made of vegetable fibers, there is little transfer of oil to the paper, and the wiping effect is extremely low. It was difficult to wipe it off.

To improve this, Japanese Patent Application Laid-Open No. 54-38852 proposes paper in which polyolefin fibers are blended into vegetable fibers, but even this paper is still unsatisfactory.

Further, JP-A-62-104955 discloses that the total weight of the fiber matrix is in the range of about 20 to about 50 g/%, and is composed of thermoplastic microfibers and cellulosic fibers,
A nonwoven tissue is disclosed comprising from about 30 to about 80 weight percent of said microfibers. However, since this nonwoven tissue also contains cellulose fibers, it has poor oil absorption speed, oil absorption, oil retention, and oil compatibility, and has insufficient oil wiping properties.

[Problem to be solved by the invention]

The object of the present invention is to solve the above-mentioned problems, and to provide an excellent cosmetic product that has excellent oil absorption speed, oil absorption, oil retention, and oil compatibility, is soft and smooth to the touch, and has sufficient strength for practical use. Our goal is to provide wiping cloths.

[Means to solve the problem]

That is, the present invention is as follows.

(1) A nonwoven sheet in which polyolefin III fibers with an average fiber diameter of 0.5 to 6 μm are partially joined,
A cosmetic wiping cloth, wherein the nonwoven sheet has a basis weight of 10 to 50 g/rd.

(2) A nonwoven sheet in which ultrafine polyolefin fibers with an average fiber diameter of 0.5 to 6 μm are partially joined, and the basis weight of the nonwoven sheet is 10 to 50 g/n (and A cosmetic wiping cloth that is a roll of a woven sheet wrapped around a cylindrical object.

The fiber material forming the bottom of the nonwoven sheet used in the present invention needs to be polyolefin. Since polyolefin is used, it has excellent oil compatibility.

Examples of polyolefins include polypropylene, polyethylene, propylene and ethylene, or alpha-butene such as 1-butene.
Examples include copolymers with olefins and blends thereof, among which polypropylene is most preferred, as it can be spun into ultrafine fibers by melt blowing and has relatively high strength.

The average fiber diameter of the polyolefin fiber used in the present invention is 0
．． The thickness is 5 to 6 μm, preferably 1.0 to 5.0 μm, and more preferably 1.0 to 3.0 μm. Fiber diameter is particularly important in the present invention. If it is 6.0μ or more, the oil absorption rate, oil absorption, and oil retention will be poor. Moreover, the texture is hard and the texture is inferior.

On the other hand, if it is less than 0.5μ, the strength of the fiber sheet will be low and will be insufficient for practical use.

The basis weight of the nonwoven sheet used in the present invention is 10 to 50 g/%, preferably 15 to 30 g/%. 50g/n (more than 10g/n, the texture becomes hard and the texture is poor;
Below 0, the strength is poor.

In addition, the bulk density of the nonwoven sheet is 0.10-0.25g/c
+d, especially 0.12 to 0.20 g/cd is preferred. Within this range, the nonwoven sheet will have excellent oil absorption speed, oil absorption, and oil retention, and will also be bulky and soft to the touch, giving it an excellent texture. This is thought to be due to the fact that the fiber diameters of the constituent fibers of the nonwoven sheet were extremely small, and an appropriate microspace was formed within the fiber sheet.

In addition, methods for manufacturing the nonwoven sheet used in the present invention include a melt blowing method, a method of forming a sheet by a direct spinning and papermaking method,
Various methods can be used, such as seabird spinning or blend spinning to form a sheet and then dissolving and removing a part of the fiber, and forming a split fiber into a sheet, but the melt blowing method is particularly preferred.

A nonwoven sheet made of ultrafine fibers can be obtained, for example, by a melt blowing method.
gChemistry), published in 1956, Vol. 48, No. 8, pp. 1342-1346, discloses a basic method and an apparatus for carrying out the method. Also, Japanese Patent Publication No. 56-33511 and Japanese Patent Application Publication No. 63-6107
The publication discloses a method for producing ultrafine polyolefin fibers.

Fibers such as polyester and polyamide may be mixed into the constituent fibers of the nonwoven sheet used in the present invention.

It is necessary that the ultrafine fibers forming the bottom of the nonwoven sheet used in the present invention are partially joined.

This bond increases the strength of the nonwoven sheet and prevents it from tearing.
It prevents tearing, delamination, etc., and provides sufficient strength as a wiping cloth.

This partial joining can be done using adhesives, or by intertwining the fibers with needle punching, water jets, etc., but in order to further increase the strength, breathability, and flexibility of the sheet, it is preferable to form the sheet by partial thermal bonding. is preferable. Partial thermal bonding is carried out by ultrasonic methods or by passing the web between heated embossing rolls. In the ultrasonic method, a web is passed between an engraved roll and an ultrasonic bone, and in the heated embossing roll method, one is an engraved roll and the other is a smooth roll, and the top and bottom are both engraved rolls and then spliced together. etc. will be adopted. The degree of thermal adhesion depends on the required performance of the resulting nonwoven fabric, such as strength, texture, and fluffiness.
Although it is determined by setting the temperature and contact pressure of the upper and lower rolls, the upper hand temperature is preferably set below the melting point of the fiber used, particularly preferably 100 to 135°C.

In addition, the quality of the obtained nonwoven sheet is affected by the embossed pattern, and among these, the thermal bonding area ratio and pattern spacing are important points.

The thermal adhesion area ratio is preferably 3 to 40%, particularly 5 to 30%, from the viewpoint of wiping properties such as oil absorption and oil retention, texture, and strength, particularly tear strength, and fluffing properties of the nonwoven sheet. A low adhesive area ratio results in poor strength and fluffing properties, while a high adhesive area ratio results in poor wiping properties such as oil absorption and oil retention, and texture. The depth of the embossed pattern varies depending on the pattern shape and pattern spacing, but is at least 0.
．． 0.05 m or more, especially 0.1 m or more is preferable. Furthermore, if the fibers in the patterned portion of the nonwoven sheet are bonded too strongly to the point where they lose their fiber form and become a film, that portion will become bent, which is not preferable. Even if the embossed pattern is a linear continuous pattern,
Separate ms such as a bottle point shape or a rectangular shape may be used, but a pattern with separate patterns is more preferable because it has a soft texture. The minimum interval of this embossed pattern is 0.3~10m
+, especially from 1 to 5 mm, it is necessary to select a preferred pattern by taking into consideration points such as 0 or more, which are preferable from the viewpoint of the texture, strength, and fluffiness of the nonwoven sheet.

The polyolefin ultrafine fiber nonwoven sheet used in the present invention is
As mentioned above, by satisfying all the combinations of having an average fiber diameter of 0.5 to 6.0μ, a basis weight of 10 to 50g/rrf, and partially joining these ultrafine fibers, the oil absorption rate and oil absorption can be improved. The present invention provides a cosmetic wiping cloth that has good properties, oil retention, and oil stain resistance, exhibits excellent wiping ability, is soft and has an excellent texture, and has sufficient strength for practical use. Furthermore, the nonwoven sheet of the present invention may be treated with a surfactant or the like to make it hydrophilic.

If the nonwoven sheet of the present invention is canted to an appropriate size, it can be used as a cosmetic wiping cloth as it is, but as shown in FIG.
You can roll it up, unroll it as much as you need, cut it, and use it. At this time, to make it easier to cut in the length direction,
It is preferable to make perforation-like cuts 3 at predetermined length intervals.

The cut may be a discontinuous line or a small hole, but is not limited to these.

〔Example〕

The present invention will be explained in more detail with reference to Examples below.

The definitions and measurement methods of various physical properties shown in Examples and Comparative Examples are shown below.

(1) Average fiber diameter (μ■) Ten arbitrary points on the sample were examined using an electron microscope at a magnification of 2000.
Take 10 photos at double magnification. The diameters of ten arbitrary fibers are measured for each photograph, and this is repeated for each of the ten photographs. A total of 100 fiber diameter measurements are obtained and the average value is calculated.

(2) Thickness (wa) Measured using a peacock-type thickness needle under a constant load of 130 g/C4.

(3) Bulk density (g/cd) This is a value calculated from the basis weight by measuring the thickness under a constant load of 130 g/c11.

(4) Tear strength (g) Take a 60width x 65mm sample, place the sample on a sample stand, and make a cut with a knife.

Read the maximum vibration using an Elmendorf tear tester (
average value in the N direction and horizontal direction).

(5) Oil absorption rate (m) Based on JIS L1096 water absorption rate B method, it is expressed as the height from the interface of oil sucked up in 10 minutes.

(6) Oil absorption (g/bo) Oil absorption amount per unit area of the sample after immersing a 10cm x 10cm sample in oil for 20 minutes, then hanging it by holding one corner of the sample, and allowing it to naturally drain for 1 degree. Indicated by

(7) Oil retention (g/rd) A sample of 10CIXIOC111 was immersed in oil for 20 minutes,
It is then expressed as the amount of oil retained per unit area of the sample after deliquing at 3,600 rpm for 2 minutes.

(8) Oil compatibility (seconds) According to the JIS t1096 w&aqueous A method dripping property measurement method, it was expressed as the penetration time when one drop of oil was dropped.

Examples 1 to 6 and Comparative Examples 1 to 4 Polypropylene was melt-blown to obtain fiber webs having various average fiber diameters and basis weights. 130 this web
Pinpoint handle of 0.57 mφ heated to °C, 1.
5m pitch, staggered arrangement, thermal bonding area ratio 11.4%, embossing depth 0.6 txtrr Passed between an embossing roll and a flantro roll, and partially thermally bonded to ultrafine fibers with a bottle point-like dot pattern. A nonwoven sheet was obtained. The physical properties of this nonwoven sheet are shown in Table 1.

Comparative Examples 5 to 6 For comparison, as cosmetic wiping cloths made of commercially available cellulose fiber paper, People (trademark of People Seibu Company) tissue paper (Comparative Example 5), cosmetic oil press paper (
(manufactured by Shiseido ■) (Comparative Example 6) is also shown in Table 1.

Example 7 The nonwoven sheet of Example 3 was slit to a width of 6c11, and 5C
Continuously pass it through a metal roll (rubber roll with a flat bottom surface) equipped with needles lined up in a row at one interval, and while making linear cut lines as shown in Figure 1, cut into a paper tube with a width of 6C11. The rolled product shown in FIG. 1 was obtained.

This product could be easily cut out along the perforation line and was extremely easy to use.

[Effects of the Invention] The cosmetic wiping cloth of the present invention is made of a nonwoven fabric sheet in which ultrafine polyolefin fibers are partially bonded, so it has good oil absorption speed, oil absorption, oil retention, and oil stain resistance, and has excellent wiping performance. It is an excellent product that has a soft texture and excellent texture, and has sufficient strength for practical use.

Further, by forming the product into a roll shape around a cylindrical object, it can be made compact and easy to use.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cosmetic wiping cloth wound into a roll according to the present invention. 1... Cylindrical core material, 2... Nonwoven sheet, 3... Cut ii1%.

Claims (2)

[Claims] 1. A cosmetic wiping cloth, which is a nonwoven sheet in which ultrafine polyolefin fibers with an average fiber diameter of 0.5 to 6 μm are partially joined, and the nonwoven sheet has a basis weight of 10 to 50 g/m^2. 2. It is a nonwoven sheet in which polyolefin ultrafine fibers with an average fiber diameter of 0.5 to 6 μm are partially joined, and the basis weight of the nonwoven sheet is 10 to 50 g/m^2, and the nonwoven sheet is Cosmetic wiping cloth is a roll-shaped material wrapped around a cylindrical object.