JP2012176085A - Facial oil blotting sheet and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a facial oil blotting sheet having high oil absorbing property, hard to break even if absorbing sebum or moisture, and securing good touch.SOLUTION: A method for producing facial oil blotting sheet includes: subjecting bacterial cellulose to subcritical treatment and producing paste in which the bacterial cellulose fibers are dissolved (step 1); and mixing the paste with other pulp fibers to produce paper stock (step 2). Further, the paper stock is used for the production (step 3), dewatering (step 4), and drying (step 5) of a wet sheet, and then the produced paper sheet is subjected to calendering (step 6) for reducing the thickness of the paper sheet. Still further, the paper sheet is cut into a required size (step 7), and the facial oil blotting sheet in which bacterial cellulose fibers are mixed is completed.

Description

  The present invention relates to a blotting paper used for removing sebum and sweat from the face during makeup retouching and the like.

  Oil blotting paper has a function of absorbing sebum by being pressed against the part of the face where sebum is secreted, and is widely used mainly by generations where sebum is actively secreted. In recent years, the number of male users has also increased and may be used for sweating purposes.

  As a conventional oil blotting paper, for example, there is an oil blotting paper that has been improved in use and sebum power by carrying out papermaking without adding filler using vegetable fiber pulp containing bamboo pulp (Patent Document 1). See). In addition, there is a blotting paper having a characteristic that a part that has absorbed sebum changes color by including an acid-base indicator and a basic substance in the base material (see Patent Document 2).

Japanese Patent No. 4415168 JP 2001-21934 A

  Users who often use oil blotting paper are looking for oil blotting paper that has a high oil-absorbing power, is not easily torn even when it absorbs sebum and moisture, and has a good texture.

  Furthermore, it is desirable for the user to be able to easily confirm the sebum absorption effect. In addition, since it is a product that directly touches the skin, it is desirable to minimize the use of chemicals.

In view of the above problems, the present invention has focused on bacterial cellulose as a material capable of producing paper satisfying the above conditions with naturally derived components.
Bacterial cellulose is produced by microorganisms such as acetic acid bacteria, and is known to have higher purity and stronger strength than plant-derived cellulose. Moreover, since it has a fine knitted fiber structure called microfil building, it can be expected that the capillary phenomenon is promoted and the absorption capacity of sebum and moisture is enhanced if it is included in the oil blotting paper.

  The oil-blotting paper according to the present invention is produced from a stock obtained by mixing bacterial cellulose fibers in pulp fibers. This oil-blotting paper is a process for producing a paste containing bacterial cellulose fibers by subjecting bacterial cellulose to a subcritical treatment, and adding a paste containing the cellulose cellulose fibers in the pulp fibers by adding this paste to the pulp material. The paper is produced by executing a producing step and a paper making step of producing the stock, and performing a calendar process for thinning the paper after drying in the paper making step.

  As the pulp material used for the paper stock, non-wood pulp, which is often used in oil-blotted paper, such as manila hemp, can be used in addition to wood pulp. Further, both wood pulp and non-wood pulp may be used at a predetermined ratio.

In the step of producing the stock, for example, after each pulp fiber is ground and beaten, a paste containing bacterial cellulose fibers is added, and the fibers are mixed evenly.
The grinding and beating of each pulp fiber may be performed for each type, or may be performed after collecting the fibers. In addition to bacterial cellulose, an appropriate amount of filler or dye may be added to the paper material.

Bacterial cellulose fibers can be obtained as a gel-like cellulose membrane by culturing microorganisms. However, since this cellulose membrane is high in strength, it is difficult to disperse the bacterial cellulose fibers evenly in the paper stock even if the mixing process is performed because the fibers cannot be made sufficiently fine by the beating process similar to that of general pulp fibers. It is.
In consideration of this point, in the present invention, a paste of fine granular bacterial cellulose fibers and moisture is produced by subcritical processing, and the bacterial cellulose fibers are evenly distributed by mixing this paste with other pulp fibers. Generated paper stock. Therefore, by carrying out the paper making process using this stock, it is possible to produce a paper with enhanced strength and accelerated capillary action.

  The paper making process can be performed using a paper machine having a general configuration. In the calendar process, careful pressure treatment is performed so that the paper becomes thin. However, since the strength of the paper is increased by the mixing of bacterial cellulose fibers, a thin and strong paper can be produced.

  According to the present invention, it is possible to increase the oil absorption and strength by paper mixed with bacterial cellulose fibers. In addition, since the transparency of the paper is increased by making the paper thinner, the sebum absorption state can be confirmed without using a chemical reaction as described in Patent Document 2. In addition, the surface of the paper is sufficiently smoothed by careful calendar processing, and this and the thinness of the paper can ensure good touch.

  Microorganisms producing bacterial cellulose can be cultivated using biomass resources such as fruit residues and squeezed liquor, so that discarded resources can be used effectively and are economical.

It is a flowchart which shows the process implemented by manufacture of oil blotting paper.

FIG. 1 shows the steps carried out in the production of oil blotting paper according to the invention.
Referring to FIG. 1, first, in a first step 1, a bacterial cellulose paste is generated.

  Specifically, bacterial cellulose extracted from a solid medium or the like and dried is ground with a mortar-like device and then subjected to subcritical treatment, so that the water just before the critical point (subcritical water) is minute. Particulate bacterial cellulose fibers dissolve and liquid gelation occurs. As a result, a paste suitable for papermaking is generated.

  In step 2, the pulp material, which is the main raw material of the paper stock, is ground and beaten into a paste, and this paste and the paste generated in step 1 are put into a mixing device and mixed thoroughly. As a result, a stock mixed with bacterial cellulose fibers is produced.

  As the pulp material used for the paper stock, non-wood pulp such as manila hemp, flax, kenaf, bamboo, banana fiber, etc. can be used in addition to wood pulp (conifer pulp or hardwood pulp). Moreover, it has been confirmed by the inventor that fibers extracted from citrus fruits such as orange can be used. Further, the paper material may contain fillers such as microtalc and additives such as dyes.

  After this, the stock is spread on the papermaking net to drain water, generating a wet sheet, step 3, pressing the wet sheet to dehydrate, step 4, drying the dehydrated wet sheet, and form of paper sheet Step 5 for adjusting to a sheet, and Step 6 for subjecting the paper sheet after drying to calendar processing with a multi-stage roll are performed in order.

  Said process 3-6 can each be implemented by the wire part of a paper machine, a press part, a dryer part, and a calendar part. In the calendar part, in addition to the purpose of smoothing the surface of the paper, careful pressure treatment is performed so that the thickness of the paper is reduced. Note that the thickness of the wet sheet may be adjusted in step 3 in order to promote thinning of the paper.

  Each process up to step 6 completes a paper sheet containing bacterial cellulose fibers. The paper sheet is wound into a roll by a winder (not shown). In the final step 7, the paper sheet is cut into a required size by a cutting machine to complete the oil blotting paper.

Next, a specific example of blotting paper to which the above manufacturing method is applied will be described together with the results of the test.
In this example, dried bacterial cellulose film extracted from a solid medium, Manila hemp and hardwood pulp, and microtalc were prepared at the following ratios.
Bacterial cellulose 0.1% by mass
Manila hemp 70.3% by mass
Hardwood pulp 29.6% by mass
Microtalc 17.8% by mass (ratio to the total of the above three materials)

Bacterial cellulose was ground and heated with water and heated to a subcritical state over 4 hours. Furthermore, the paste which the bacterial cellulose fiber melt | dissolved in subcritical water was produced | generated by heating at the temperature of the range of 110-119 degree | times for 3 hours. For Manila hemp and hardwood pulp, paste was made by ordinary beating treatment, and each paste and microtalc were mixed in a mixing device to produce a stock.
The ratio of bacterial cellulose fiber paste to Manila hemp and hardwood pulp paste was 18.5%.

  After the above materials were mixed with a mixing device to produce a stock, the steps 3 to 7 were performed in order to produce a blotting paper in which bacterial cellulose fibers were distributed. Using this blotting paper (hereinafter referred to as “invention sample”) and a conventional product that does not contain bacterial cellulose fibers (hereinafter referred to as “conventional product sample”), the basis weight, thickness, density, tension JIS-compliant tests were performed on strength (longitudinal and lateral directions) and wet tensile strength (vertical direction only). A summary of the experimental results is shown in Table 1. The “increase rate with respect to the conventional product” in the table represents [(value of the sample of the invention product−value of the sample of the conventional product) / value of the sample of the conventional product] in units of percent.

  The conventional product sample was produced from a paper stock mainly composed of Manila hemp and hardwood pulp. The percentage of Manila hemp in the stock was 71.0% and the percentage of hardwood pulp was 28.6%.

  Examining the above experimental results, the actual basis weight and thickness were slightly lower in the invention sample than in the conventional product sample, and the density was almost the same in both cases. In addition, the value of the tensile strength in the horizontal direction was slightly higher in the conventional sample, but the tensile strength in the vertical direction was found to increase by about 4% with respect to the value of the conventional sample. Further, with respect to the wet tensile strength, an increase of 19.83% over the conventional product sample was observed.

  As shown in Table 1, the inventive sample was thinner and the basis weight was lower than the conventional sample. The density of the inventive sample was slightly higher. The results showed that the strength during drying was stronger for the inventive sample in the vertical direction and stronger for the conventional sample in the horizontal direction. Regarding the strength when wet, it was found that the strength of the inventive sample was significantly higher than that of the conventional sample.

  Looking at the experimental results of the strength in the longitudinal and transverse directions during drying, there appears to be no significant difference in strength between the samples. However, considering the experimental result that the thickness of the inventive sample is thinner than that of the conventional sample, it can be considered that the strength of the inventive sample is superior to that of the conventional product. Further, from the experimental data on the strength when wet, the inventive sample is considered to be overwhelmingly strong with respect to the strength after absorbing sebum and moisture.

  Next, 43 subjects were asked to compare and use the inventive sample and the conventional sample, and a questionnaire was conducted asking which sample was superior in terms of the degree of sebum absorption and the feeling of use. The following results were obtained.

As shown in Table 2, with respect to the degree of sebum absorption, more than four times the number of people who selected the conventional sample answered that the inventive sample was superior. In terms of the feeling of use, more than twice the number of people who selected the conventional sample selected the invention sample.
Therefore, it is considered that the inventive product sample has a higher oil-absorbing power than the conventional product sample, and the usability is improved from the conventional product sample.

  The invention sample was only mixed with 0.1% bacterial cellulose based on the total pulp material, but as described above, it was confirmed that the oil absorption and strength were improved and the touch was also good. . If the content of bacterial cellulose is further increased, it is considered that the oil-absorbing power and the strength when wet are further increased. Further, if the strength of the paper is increased, the thickness can be further reduced, and a highly transparent oil-blotted paper can be produced, so that the state of absorption of sebum can be easily confirmed.

Claims (2)

  Oil-blotted paper produced from a stock made by mixing bacterial cellulose fibers with pulp fibers.   Producing a paste containing bacterial cellulose fibers by subjecting bacterial cellulose to a subcritical process, adding paste to the pulp material to produce a stock in which bacterial cellulose fibers are mixed in pulp fibers, and generating And a paper making process for carrying out a calendar process for thinning the dried paper in the paper making process.

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