Oil detection test paper for oily skin grading test and preparation method of oil detection test paper

Abstract

The invention discloses oil detection test paper for oily skin grading test, which comprises a paper-based oil absorption layer, and the paper-based oil absorption layer has a shape fitting the face; wherein the raw materials of the paper-based oil absorption layer comprise the following components in percentage by mass: 60-80% of plant-based fibers, 0-15% of elastic fibers, 1-5% of oil absorption microparticles and 10-20% of an adhesive. The invention also discloses a preparation method and a use method of the oil test paper. The oil detection test paper for the oily skin grading test disclosed by the invention not only can effectively absorb facial oil, but also can visually display facial oil outlet conditions and oil outlet parts, so that a user is helped to better know own skin conditions and take corresponding nursing measures.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning products, and in particular to an oil testing paper for oily skin grading test and a preparation method thereof. Background Art

[0002] Oil-absorbing facial tissue is a thin paper or tissue with strong sebum absorption. In existing facial care products, people usually use this oil-absorbing facial tissue to absorb excess facial oil to prevent facial pimples and keep the facial skin clean and fresh. At present, the oil-absorbing facial tissue generally available on the market has only one layer of oil-absorbing film. When used, the oil-absorbing film can be attached to the oily part of the skin and pressed, so that the oil in the skin is absorbed by the oil film layer due to capillary action, so as to remove excess oil on the face.

[0003] However, existing oil-absorbing facial tissue products often cannot intuitively display the oiliness of the face and the oily areas, and thus cannot provide detailed information about the oiliness of the skin. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an oil test paper for oily skin grading test, which can not only effectively absorb facial oil, but also intuitively display the facial oiliness and oily parts, thereby helping users to better understand their skin condition and take corresponding care measures.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The first aspect of the present invention provides an oil test paper for oily skin grading test, comprising a paper-based oil absorption layer, wherein the paper-based oil absorption layer has a shape that fits the face;

[0007] The raw materials of the paper-based oil-absorbing layer include the following components by mass percentage:

[0008] Plant-based fiber 60-80%

[0009] Elastic fiber 0~15%

[0010] Oil absorbing micro particles 1~5%

[0011] Adhesive 10-20%.

[0012] The present invention comprises 60-80% of plant-based fibers and 0-15% of elastic fibers, wherein the plant-based fibers have good oil absorption properties, and the addition of elastic fibers is beneficial to improving the toughness of the paper-based oil absorption layer, making the paper-based oil absorption layer softer and stronger; at the same time, the elastic fibers can improve the fit of the oil-absorbing paper and enable it to better fit the facial skin.

[0013] Secondly, 1-5% of oil-absorbing microparticles are added to the paper-based oil-absorbing layer of the present invention. These oil-absorbing microparticles have a porous structure, and the surface is hydrophobically treated, so they have strong oil-absorbing and oil-retaining capabilities. Moreover, the oil-absorbing microparticles have a large aspect ratio and specific surface area, and can serve as channels for oil transmission, and can quickly absorb facial oil into the paper-based oil-absorbing layer.

[0014] Thirdly, 10-20% of adhesive is added to the paper-based oil-absorbing layer of the present invention. The addition of adhesive can improve the fit between the oil test paper and the skin, so that the oily parts of the face can be displayed more accurately after using the oil test paper. At the same time, the addition of adhesive can also improve the surface smoothness of the oil test paper to a certain extent, making it less irritating to the skin.

[0015] In addition, the oil test paper of the present invention is in the shape of a mask, so the skin oiliness of different products can be directly compared on half of the face over a period of time. In view of the different oiliness of different parts, the advantage of the oil test paper is that it is more intuitive and comprehensive.

[0016] In the present invention, the mass proportion of plant-based fibers in the raw materials of the paper-based oil-absorbing layer is 60-80%, for example, 60%, 62%, 65%, 68%, 70%, 72%, 75%, 78%, 80%, etc. The plant-based fibers can be fibers from various plants, including but not limited to at least one of flax fibers, wood pulp fibers, jute fibers, bamboo fibers, cotton fibers, and rice husk fibers.

[0017] In the present invention, in the raw material of the paper-based oil-absorbing layer, the mass proportion of elastic fiber is 0-15%, for example, it can be 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc. The elastic fiber can be a natural fiber or a synthetic fiber; the natural fiber can include natural latex fiber; the synthetic fiber can include at least one of polyurethane fiber, polyolefin elastic fiber, polyether ester elastic fiber, and composite elastic fiber.

[0018] In the present invention, the mass proportion of the oil-absorbing microparticles in the raw material of the paper-based oil-absorbing layer is 1-5%, for example, 1%, 2%, 3%, 4%, 5%, etc. Further, the oil-absorbing microparticles are hydrophobic and oleophilic cellulose staple fibers, with a diameter of 0.2-20 microns, a length of 10-1000 microns, and an aspect ratio of 20-200.

[0019] Furthermore, the surface of the oil-absorbing microparticles is coated with a hydrophobic substance, and the hydrophobic substance includes at least one of metal soap, paraffin, long-chain fatty acid, silicone resin, and fluorocarbon polymer. Through the coating of the hydrophobic substance, the oil-absorbing microparticles exhibit excellent hydrophobic and lipophilic properties, and thus have a strong absorption capacity for sebum on the skin surface.

[0020] In the present invention, the mass proportion of the binder in the raw materials of the paper-based oil-absorbing layer is 10-20%, for example, 10%, 12%, 14%, 15%, 16%, 18%, 20%, etc. Further, the binder includes but is not limited to at least one of xanthan gum, guar gum, agar, gelatin, and beeswax.

[0021] Furthermore, in some preferred embodiments, the raw material of the paper-based oil-absorbing layer also includes 1-5% of an indicator, for example, 1%, 2%, 3%, 4%, 5%, etc. The indicator includes but is not limited to one of a pH indicator and a fluorescent indicator.

[0022] In the above embodiment, the addition of the indicator can more intuitively display the oily area and oily situation of the face. Taking the pH indicator as an example, since the sebum secreted by the skin is weakly acidic as a whole, when the pH indicator is added to the paper-based oil-absorbing layer, the local pH of the oil-testing paper changes after oil absorption, which in turn causes a color change reaction in the oil-absorbing area, thereby intuitively displaying the size and depth of the oil-absorbing area.

[0023] In addition, there is a type of Propionibacterium acnes (P.acnes) living in human hair follicles. This type of bacteria can secrete porphyrins. This type of porphyrin is a free radical that can absorb the energy of ultraviolet and blue light, become a trimer, and release singlet oxygen, which has a strong oxidizing ability. Therefore, a display agent for this type of bacterial flora, such as a fluorescent indicator, can be added to the paper-based oil-absorbing layer, so as to intuitively display the size and depth of the oil-absorbing area through a fluorescent reaction.

[0024] Furthermore, the raw materials of the paper-based oil-absorbing layer also include 1-3% of inorganic pigments, for example, 1%, 2%, 3%, etc. The addition of inorganic pigments can change the color of the paper-based oil-absorbing layer, so that the oil test paper has different colors. Moreover, the addition of inorganic pigments can cause a significant change in the color and transparency of the area that absorbs sebum in the paper-based oil-absorbing layer, and produce a large color difference with the non-absorbed area, so that the oil production situation and oil production site of the face can be determined more accurately. Furthermore, the inorganic pigment can be various commonly used inorganic pigments, including but not limited to one of calcium carbonate, ultramarine, and iron oxide.

[0025] The second aspect of the present invention provides a method for preparing an oil test paper for oily skin grading test, comprising the following steps:

[0026] S1. The plant-based fiber and elastic fiber are mixed and dispersed in a formula, and then the oil-absorbing microparticles and the binder are added to obtain a base paper pulp;

[0027] S2. The base paper pulp is prepared into oil-absorbing paper through a papermaking process, and calendered to obtain the oil-testing paper.

[0028] In the above step S1, the base paper pulp can be obtained by a conventional papermaking process, for example, when the formulated amount of plant-based fiber and elastic fiber raw materials are dispersed in water, the pulp raw materials dispersed in the water are then beaten by a pulper or a pulper to make the fiber raw materials swell, branch and cut to form a pulp. By beating in this way, a flexible and dense paper can be obtained. Then, oil-absorbing microparticles and a binder are added to the pulp, and the base paper pulp is obtained after dispersion.

[0029] Furthermore, in step S1, during the pulping process, a step of adding 0.1-0.5wt% (relative to the total weight of the paper-based oil-absorbing layer raw material) of a dispersant to the pulp is also included, so that the elastic fibers, oil-absorbing microparticles and other hydrophobic substances can be fully wetted and dispersed in water. The dispersant includes but is not limited to at least one of sodium coconut sulfate, fatty alcohol polyoxyethylene ether, polyoxyethylene nonylphenyl ether, sodium dioctyl sulfosuccinate, and sodium fatty alcohol polyoxyethylene ether sulfate.

[0030] The third aspect of the present invention provides a method for using the oil test paper for oily skin grading test, comprising:

[0031] Stick the paper-based oil-absorbing layer on the face, wait for 3 to 10 minutes and then remove it. Based on the distribution of oil on the paper-based oil-absorbing layer, you can determine the oily areas and conditions on the face.

[0032] Furthermore, the oil test strips after use can be analyzed by software methods to obtain the skin oiliness classification.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The oil test paper for oily skin grading test provided by the present invention has a structure similar to that of a facial mask and has good fit with facial skin. When in use, the paper-based oil-absorbing layer is attached to the face, which can completely cover the entire facial skin and has good fit, and can fully absorb the oil secreted by various areas of the face.

[0035] 2. The oil test paper for oily skin grading test provided by the present invention has a strong oil absorption capacity and can effectively absorb oil from various parts of the face. It not only has a strong cleaning ability, but also facilitates the subsequent evaluation of the oil secretion of the skin.

[0036] 3. The oil test paper for oily skin grading test provided by the present invention will undergo significant changes in color and transparency after absorbing oil, and produce a large color difference between the area that has not been absorbed, thereby intuitively and more accurately displaying the oiliness of the face and the oily areas, thereby helping users to better understand their skin condition and take corresponding care measures.

[0037] 4. The oil test paper of the present invention is in the shape of a mask, so you can directly compare the oil production of different products on your half face over a period of time. As the amount of oil produced in different parts of your body is different, the advantage of oil-absorbing facial paper is that it is more intuitive and comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a photo of the oil testing paper for oily skin grading test prepared in Example 1 of the present invention;

[0039] Figure 2 The grease distribution of the oil test paper of Example 1 (above) and Comparative Example 1 (below) after use;

[0040] Figure 3 A grading chart for the amount of oil produced by the skin. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] Unless otherwise specified, the experimental methods used in the following examples and comparative examples are all conventional methods, and the materials, reagents, etc. used are all commercially available unless otherwise specified.

[0044] Example 1

[0045] This embodiment provides an oil test paper for oily skin grading test, comprising a paper-based oil absorption layer. The paper-based oil absorption layer has a shape matching the face and is provided with openings at the eyes, nose and mouth.

[0046] The raw materials of the paper-based oil-absorbing layer include the following components by weight:

[0047]

[0048] The preparation method of the oil test paper for oily skin grading test in this embodiment is as follows:

[0049] S1. Disperse the formulated amount of flax fiber and spandex fiber in water, add 0.2% dispersant sodium diisooctyl sulfosuccinate, mix, disperse and then beat; then add hydrophobic and lipophilic cellulose staple fibers (diameter of 1 to 3 microns, length of 50 to 300 microns, aspect ratio of 30 to 100, and surface coated with long-chain fatty acids), xanthan gum and calcium carbonate, continue mixing, and obtain base paper pulp;

[0050] S2. The base paper pulp is made into paper using a papermaking machine, and then calendered to obtain an oil test paper for oily skin grading test.

[0051] Figure 1 That is a physical photo of the oil test paper prepared in this embodiment.

[0052] Example 2

[0053] The difference between this embodiment and embodiment 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0054]

[0055] Example 3

[0056] The difference between this embodiment and embodiment 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0057]

[0058] Example 4

[0059] The difference between this embodiment and embodiment 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0060]

[0061]

[0062] Example 5

[0063] The difference between this embodiment and embodiment 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0064] Example 6

[0065] The difference between this embodiment and embodiment 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0066] Example 7

[0067] The difference between this embodiment and embodiment 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0068]

[0069]

[0070] Comparative Example 1

[0071] The difference between Comparative Example 1 and Example 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight: Flax fiber 75 parts by weight

[0072] Xanthan gum 10 parts by weight

[0073] 1 part by weight of calcium carbonate.

[0074] Comparative Example 2

[0075] The difference between Comparative Example 2 and Example 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0076] Comparative Example 3

[0077] The difference between Comparative Example 3 and Example 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0078] Comparative Example 4

[0079] The difference between Comparative Example 3 and Example 1 is that the raw materials of the paper-based oil-absorbing layer include the following components in parts by weight:

[0080]

[0081] Performance Testing

[0082] Test 1:

[0083] The oil-absorbing papers prepared in Examples 1 to 7 and Comparative Examples 1 to 4 were tested for their grammage, thickness and oil absorption performance, and the results are shown below.

[0084] Oil absorption performance test method: 0.2mL castor oil is supplied to a pair of printing rollers of the transfer device, and the printing rollers are rotated to form a thin and uniform oil film on the printing rollers. Then the oil-absorbing paper sample is pasted on the substrate, and the castor oil is transferred to the surface of the oil-absorbing paper sample through the printing roller at room temperature; the roller pressure during transfer is 350g / m 2 The transfer speed is 10rpm. The color difference ΔE of each sample before and after transfer is tested by a spectrophotometer. During the test, 6 points are evenly selected on the sample and the average value is calculated.

[0085] Table 1 Oil absorption performance test results

[0086]

[0087]

[0088] Please refer to Table 1. The weight of the oil-absorbing paper prepared in each embodiment and comparative example is 10 g / m 2 , the thickness is between 18 and 22 microns.

[0089] During the oil absorption performance test, a thin layer of oil film is formed on the printing roller. During the transfer process, the oil absorbing paper contacts the roller surface and absorbs the oil on the roller surface. The surface color and transparency of the oil absorbing paper change after absorbing the oil, and the color difference is different from the color before absorption. The size of the color difference can reflect the oil absorption capacity.

[0090] Please refer to Table 1. For the oil absorbing papers prepared in Examples 1 to 7, in the transfer experiment, the color difference before and after the oil absorbing papers was all above 7.0, and the color difference before and after the transfer was very obvious.

[0091] The oil-absorbing paper prepared in Comparative Example 1 does not contain elastic fibers and hydrophobic oleophilic cellulose staple fibers in its raw materials. From the results, the color difference before and after transfer is only 3.7, which is much lower than that of Examples 1 to 7. The oil-absorbing papers prepared in Comparative Examples 2 and 3 do not contain hydrophobic oleophilic cellulose staple fibers and elastic fibers in their raw materials, respectively. The color differences before and after transfer are 4.3 and 4.7, respectively, which are also significantly lower than that of Examples 1 to 7. This shows that the addition of elastic fibers and hydrophobic oleophilic cellulose staple fibers in the oil-absorbing paper is beneficial to improving the oil absorption capacity of the oil-absorbing paper.

[0092] The oil absorbing paper prepared in Comparative Example 4 does not contain xanthan gum as a binder in its raw materials, and the color difference before and after transfer is 6.2, which is also lower than that of Examples 1 to 7. This indicates that the addition of xanthan gum also improves the oil absorption capacity of the oil absorbing paper to a certain extent.

[0093] Figure 2The oil distribution of the oil test paper of Example 1 (upper) and Comparative Example 1 (lower) after use is shown. As can be seen from the figure, the oil absorption effect of the oil test paper of Example 1 is significantly better than that of Comparative Example 1, and the color at the forehead and nose wing is darker than that at other areas, indicating that the amount of oil released at the forehead and nose wing is larger.

[0094] Test 2:

[0095] Female volunteers aged 18 to 45 were selected as subjects. The inclusion criteria were that the subjects had no facial skin diseases such as dermatitis. On the day of the test, the subjects were required not to wash their faces after getting up early, and not to use any skin care products or cosmetics. The oil-absorbing facial paper prepared in Example 1 was applied to the face of the subject. After 15 minutes, the oil-absorbing facial paper was peeled off and the oil values ​​of the left forehead, right forehead, left cheek, and right cheek of the oil-absorbing facial paper were tested. According to the oil value of the oil-absorbing facial paper, the following was established: Figure 3 The oil yield classification diagram is shown.

[0096] See also Figure 3 , using the oil test paper of the present invention, a grading chart of skin oil production can be established. According to the grading chart, the level of skin oil production can be determined intuitively and quickly.

[0097] In summary, the present invention provides an oil test paper for oily skin grading test, and the oil-absorbing facial paper has a structure similar to that of a facial mask. When in use, the paper-based oil-absorbing layer is attached to the face, which can completely cover the entire facial skin and has good conformability; and it has a strong oil absorption capacity, and can intuitively and relatively accurately display the facial oiliness and oily parts, thereby helping users better understand their skin conditions and take corresponding care measures.

[0098] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. An oil test paper for oily skin grading test, characterized in that: It comprises a paper-based oil-absorbing layer, wherein the paper-based oil-absorbing layer has a shape that fits the face; The raw materials of the paper-based oil-absorbing layer include the following components by mass percentage:

2. The oil test paper for oily skin grading test according to claim 1, characterized in that: The plant-based fiber includes at least one of flax fiber, wood pulp fiber, jute fiber, bamboo fiber, cotton fiber, and rice husk fiber.

3. The oil test paper for oily skin grading test according to claim 1, characterized in that: The elastic fiber includes at least one of natural latex fiber, polyurethane fiber, polyolefin elastic fiber, polyether ester elastic fiber and composite elastic fiber.

4. The oil test paper for oily skin grading test according to claim 1, characterized in that: The oil-absorbing microparticles are hydrophobic and lipophilic cellulose staple fibers with a diameter of 0.2 to 20 microns, a length of 10 to 1000 microns, and an aspect ratio of 20 to 200; the surface of the oil-absorbing microparticles is coated with a hydrophobic substance, and the hydrophobic substance includes at least one of metal soaps, paraffin, long-chain fatty acids, silicone resins, and fluorocarbon polymers.

5. The oil test paper for oily skin grading test according to claim 1, characterized in that: The adhesive comprises at least one of xanthan gum, guar gum, agar, gelatin and beeswax.

6. The oil test paper for oily skin grading test according to claim 1, characterized in that: The raw material of the paper-based oil-absorbing layer also includes 1-5% of an indicator, and the indicator includes one of a pH indicator and a fluorescent indicator.

7. The oil test paper for oily skin grading test according to claim 1, characterized in that: The raw material of the paper-based oil-absorbing layer also includes 1-3% of inorganic pigments, and the inorganic pigments include one of ultramarine, iron oxide and calcium carbonate.

8. A method for preparing an oil test paper for oily skin grading test according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. The plant-based fiber and elastic fiber are mixed and dispersed in a formula, and then the oil-absorbing microparticles and the binder are added to obtain a base paper pulp; S2. The base paper pulp is prepared into oil-absorbing paper through a papermaking process, and calendering treatment is performed to obtain the oil-testing paper for oily skin grading test.

9. The method for preparing an oil test paper for oily skin grading test according to claim 8, characterized in that: In step S1, during the pulping process, it also includes the step of adding 0.1-0.5% of a dispersant to the slurry; the dispersant includes at least one of sodium coconut sulfate, fatty alcohol polyoxyethylene ether, polyoxyethylene nonylphenyl ether, sodium diethylhexyl sulfosuccinate, and sodium fatty alcohol polyoxyethylene ether sulfate.

10. The method for using the oil test paper for oily skin grading test according to any one of claims 1 to 7, characterized in that: include: Stick the paper-based oil-absorbing layer on the face, wait for 3 to 10 minutes and then remove it. Based on the distribution of oil on the paper-based oil-absorbing layer, you can determine the oily areas and conditions on the face.

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