JP4234075B2 - Toilet Paper - Google Patents

Description

  The present invention relates to toilet paper that achieves both a moist feeling due to a moisturizing chemical and a paper strength property.

  In the toilet paper provided in the form of a sheet or roll, a paper impregnated with a moisturizing chemical is known in order to give a moist feeling. However, when impregnated with a moisturizing chemical, there is a problem that the paper strength is reduced and the paper is easily torn, and the paper is likely to be broken during the winding process. On the other hand, since this type of toilet paper needs to be discarded after being used in a flush toilet, it must have good water disintegration and use a wet paper strength enhancer to increase paper strength. I can't.

Therefore, in the following Patent Document 1, glycerin, diglycerin, a polyethylene glycol, sorbit, propylene glycol, 1,3-butylene glycol, glycine betaine, pyrrolidone carboxylic acid having an average molecular weight in a predetermined range as a moisturizing chemical solution on a water-degradable base paper. One or more of pyrrolidone carboxylate, maltitol, sodium lactate, and one or more of sodium carboxymethylcellulose, starch, modified starch, guar gum, polyvinyl alcohol, polyacrylamide as a dry paper strength enhancer In addition to these components, in addition to these, a hydrolytic paper containing polyethylene glycol having an average molecular weight in a predetermined range as a water-soluble wax has been proposed.
Japanese Patent Laid-Open No. 9-154664

  However, in the case of the above-mentioned patent document 1, after impregnating the moisturizing chemical solution, it is left for a predetermined time (in the same document, it is allowed to stand at a humidity of 65 ± 5% and a temperature of 20 ± 1 ° C. for 20 hours) and naturally dried. In the state, it is possible to maintain the paper strength by reinforcing the hydrogen bond by adding a dry paper strength enhancer, but the paper is in a wet state when the moisturizing chemical solution is applied or sprayed, and the drying Since the paper strength enhancing effect of the paper strength enhancing agent cannot be expected, there is a possibility that the paper breaks during the winding process.

  Therefore, the main problem of the present invention is to provide a toilet paper that has both a moist feeling and a paper strength property while having sufficient water decomposability, and has a paper strength strength even during winding, and does not cause paper breakage. There is.

  In order to solve the above-mentioned problems, the present invention according to claim 1 is a toilet paper in which at least three or more water-decomposable paper sheets are stacked, and the exposed water-decomposable paper sheet of the front surface layer and the back surface layer Toilet paper is provided in which the moisturizing chemical solution is applied and the water-degradable paper sheet of the intermediate layer is not coated with the moisturizing chemical solution.

  In the present invention according to claim 1, the toilet paper is a laminate of at least three or more water-decomposable paper sheets, and a moisturizing chemical is applied to the water-decomposable paper sheets of the front surface layer and the back surface layer. The water-degradable paper sheet is not coated with a moisturizing chemical. Accordingly, the toilet paper on the front and back layers that come into contact with the skin is moistened by the application of the moisturizing chemical solution, while the moisturizing chemical solution is not applied to the toilet paper of the intermediate layer, thus maintaining the paper strength. It is possible to prevent paper breakage even during winding processing.

  As the present invention according to claim 2, in the water-decomposable paper sheet of the front surface layer and the back surface layer, the application amount of the moisturizing chemical is 5 to 30% by weight based on the dry weight of the paper. 1 is provided.

  As an aspect of the present invention according to claim 3, the average deviation of the friction coefficient (variation of surface roughness when the friction element is moved: MMD) is 7.0 to 12.0. Toilet paper is provided.

  As the present invention according to claim 4, the toilet paper has a dry tensile strength based on JIS P 8113 (longitudinal direction) of 200 to 500 cN / 15 mm and (lateral direction) of 50 to 200 cN / 15 mm. A toilet paper according to any one of the above is provided.

  As the present invention according to claim 5, as the moisturizing chemical solution, polyhydric alcohol such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, sorbitol, glucose, xylitol, maltose, maltitol, mannitol 1 or 4 of the group consisting of saccharides such as trehalose, glycolic drugs and derivatives thereof, higher alcohols such as cetanol, stearyl alcohol and oleyl alcohol, and liquid paraffin alone or in any combination. Toilet paper according to crab is provided.

As the present invention according to claim 6, wherein the water disintegratable paper sheet, the basis weight toilet paper is provided as claimed in claims 1-5 or a 10 to 30 g / m ^2.

  As described above in detail, according to the present invention, it is possible to achieve both a moist feeling and a paper strength property while having sufficient water disintegration, and also has a paper strength strength even during winding. It will not be generated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The toilet paper according to the present invention is a toilet paper in which at least three or more water-decomposable paper sheets are stacked, and a moisturizing chemical solution is applied to the exposed water-decomposable paper sheets of the front surface layer and the back surface layer, The intermediate layer water-decomposable paper sheet is one in which the moisturizing chemical is not applied.

  Specifically, as shown in FIG. 1 (A), when the water-degradable paper sheet has a three-layer structure, a moisturizing chemical solution is applied to the front and back layers 1A and 1B, and the intermediate layer 1C is coated. If the moisturizing chemical solution is not applied and the water-degradable paper sheet has a four-layer structure as shown in FIG. 1 (B), the moisturizing chemical solution is applied to the front and back layers 1A and 1B. In the case where the moisturizing chemical solution is not applied to the intermediate layers 1C and 1D and the water-degradable paper sheet has a five-layer structure as shown in FIG. Applies a moisturizing chemical solution and does not apply the moisturizing chemical solution to the intermediate layers 1C, 1D, 1E.

  The toilet paper has at least 3 layers, preferably 6 layers or less, more preferably 3 layers or 4 layers. If the structure is less than 3 layers, the structure of the present invention cannot be adopted.

  In the water-decomposable paper sheet of the surface layer 1A and the back layer 1B, the amount of the moisturizing chemical solution applied is 5 to 30% by weight, preferably 10 to 25%, more preferably 12 to 18%, based on the dry weight of the paper. It is desirable to apply in proportions. If the coating amount is less than 5%, a sufficiently moist feeling cannot be obtained. When the coating amount exceeds 30%, a sticky feeling is produced and the feeling of use becomes worse. The moisture content of the front and back layers 1A and 1B (total moisture content including paper moisture) is 7 to 20%, preferably 10 to 15%.

  Examples of the moisturizing chemicals include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, saccharides such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose, and glycol. One or more members selected from the group consisting of system drugs and derivatives thereof, higher alcohols such as cetanol, stearyl alcohol and oleyl alcohol, liquid paraffin and the like can be used alone or in any combination. In addition, amino acids such as glycine, aspartic acid, arginine, alanine, cystine, cystine, aloe extract, achacha extract, ashitaba extract, karin extract, cucumber extract, cedar extract, tomato extract, wild rose extract, lily extract, forsythia extract Plant extracts such as olive oil, jojoba oil, rosehip oil, almond oil, eucalyptus oil, avocado oil, camellia oil, soybean oil, safflower oil, sesame oil, evening primrose oil, vitamins, hydrolyzed collagen, Hydrolyzed keratin, hydrolyzed silk, chitosan, urea, honey, royal jelly, sodium hyaluronate, ceramide, squalane, petrolatum and the like can be blended.

  Regarding the surface characteristics of the front and back layers, the average deviation of the friction coefficient (variation of surface roughness when moving the friction element: MMD) is 7.0 to 12.0, preferably 7.0 to 10.0. It is desirable to do. The MMD is a value measured using “Friction Tester KESSE” manufactured by Kato Tech Co., Ltd. In the measurement, as shown in FIG. 2, 10 piano wires having a diameter of 5 mm are adjacent to each other, a unit bulging portion having a radius of curvature of the tip of 0.25 mm is adjacent to each other, and a continuous contact having a total width of 5 mm. While a friction element having a surface and a contact surface length of 5 mm is brought into contact with the paper sample with a contact pressure of 50 g, a tension of 20 g / cm is applied to the paper sample in the moving direction, and 0.1 cm / The coefficient of friction when moving 2 cm at a speed of second is measured, and the value is obtained by dividing the coefficient of friction by the friction distance (movement distance = 2 cm).

  When the MMD is less than 7.0, the friction at the time of wiping is small and the sheet is not suitable for wiping. When the MMD is more than 12.0, the surface property is rough and the feeling of use becomes worse.

The water-decomposable paper sheet has a basis weight of 10 to 30 g / m ² and 13 to ²⁰ g / m ² , and the toilet paper has a dry tensile strength based on JIS P 8113 (longitudinal direction) of 200 to 500 cN / 15 mm, ( (Lateral direction) 50 to 200 cN / 15 mm is desirable. If the tensile strength is less than the above value, tearing may occur during wiping. Moreover, when exceeding the said numerical value, there exists hardness and wiping off property worsens.

  The pulp used as the main raw material of the water-degradable paper sheet may be a deinked pulp obtained by deinking waste paper, in addition to chemical pulp such as the hardwood kraft pulp (LBKP) and softwood kraft pulp (NBKP). Good. These pulps may be used in the state of unbleached pulp or bleached pulp.

  When blending the hardwood kraft pulp (LBKP) and the softwood kraft pulp (NBKP), it is desirable to blend the softwood kraft pulp in a proportion of 30 to 70% by weight, preferably 40 to 60% by weight. When the blending amount of the softwood kraft pulp is less than 30% by weight, it is difficult to ensure sufficient strength. On the other hand, if it exceeds 70% by weight, the softness is lost and the feeling of use becomes worse.

  By the way, the application of the moisturizing chemical solution to the water-decomposable paper sheet is performed by laminating each water-decomposable paper sheet and then spraying the moisturizing chemical solution on the front and back layers, or by the gravure transfer or flexographic transfer method. It can be applied by transferring a chemical solution. The application of the moisturizing chemical solution may be performed either online or offline.

[Other examples]
(1) The toilet paper according to the present invention is a sheet (for example, a form similar to a tissue paper provided by folding in a box) or a roll (rolled with or without a core so that it can be attached to a roll holder) It is possible to provide any form of the form wound around the body.

  Hereinafter, a tensile strength test and an MMD test for verifying the effect of the present invention were performed.

Using a water-degradable paper sheet having a basis weight of 15 g / m ^2, the following five cases of toilet paper specimens were prepared with a three-layer structure. The moisturizing chemical solution used was a glycerin-based moisturizing agent.
Case 1: Moisturizing chemical is not applied Case 2: Moisturizing chemical is applied to all three layers at a rate of 10% Case 3: Moisturizing chemical is applied to the front and back layers at a rate of 10%, and the intermediate layer is not applied Case 4: 20% moisturizing chemical solution applied to all 3 layers Case 5: 10% moisturizing chemical solution applied to front and back layers, intermediate layer not applied JIS for the above five specimens A dry tensile strength test based on P 8113 was conducted, a longitudinal tensile strength test and a transverse tensile strength test were conducted, and an MMD test was conducted.

  The results were as shown in Table 1 below.

上記表１より、本発明トイレットペーパーに係るケース２及びケース５の場合は、３層すべてに保湿系薬液を塗布したケース２及びケース４に比べて、保湿系薬液塗布の影響による強度低下を抑えることができ、相対的に引張強度の向上が図れることが判明した。

From Table 1 above, in the case 2 and case 5 according to the toilet paper of the present invention, compared to Case 2 and Case 4 in which the moisturizing chemical solution is applied to all three layers, the strength reduction due to the influence of the moisturizing chemical solution application is suppressed. It was found that the tensile strength can be improved relatively.

It is a figure which shows the cross-sectional structural example of the toilet paper which concerns on this invention. It is a figure which shows the test point of MMD.

Explanation of symbols

  1A ... surface layer, 1B ... back surface layer, 1C · 1D · 1E ... intermediate layer

Claims (6)

  Toilet paper in which at least three or more water-decomposable paper sheets are stacked, a moisturizing chemical is applied to the exposed water-decomposable paper sheet of the front surface layer and the back surface layer, and the water-decomposable paper sheet of the intermediate layer is Toilet paper characterized in that no moisturizing chemical is applied.   The toilet paper according to claim 1, wherein in the water-degradable paper sheet of the front surface layer and the back surface layer, the amount of the moisturizing chemical solution applied is 5 to 30% by weight with respect to the dry weight of the paper.   The toilet paper according to any one of claims 1 and 2, wherein an average deviation of a friction coefficient (variation of surface roughness when the friction element is moved: MMD) is 7.0 to 12.0.   The toilet paper according to any one of claims 1 to 3, wherein the toilet paper has a dry tensile strength based on JIS P 8113 (longitudinal direction) of 200 to 500 cN / 15 mm and (lateral direction) of 50 to 200 cN / 15 mm.   Examples of the moisturizing chemicals include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, and polyethylene glycol, saccharides such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, and trehalose, and glycol drugs. The toilet paper according to any one of claims 1 to 4, wherein one or more members selected from the group consisting of higher derivatives such as cetanol, stearyl alcohol, oleyl alcohol, and liquid paraffin, and liquid paraffin are used alone or in any combination. Basis weight is toilet paper according to any of claims 1 to 5 which is 10 to 30 g / m ² of the water disintegratable paper sheet.

Images