JP6105877B2 - Sanitary tissue paper - Google Patents

Description

  The present invention relates to sanitary thin paper such as tissue paper and toilet paper, and more particularly relates to sanitary thin paper excellent in wiping property while having a low basis weight.

  In recent years, with the increase in the population of hay fever, the demand for lotion tissue paper pursuing moistness, smoothness and softness during use has increased. The lotion tissue paper is provided with a moisturizing agent composed of a polyhydric alcohol such as glycerin, an oily component such as silicone oil, paraffin, squalane and myristic ester, a quaternary ammonium salt and the like as a lotion component.

  However, in patients with allergic rhinitis and the like, the frequency of nasal congestion is high, and even if lotion tissue is used, skin troubles such as redness and irritation of the nose and its surroundings tend to occur.

  Therefore, for the purpose of preventing skin troubles and maintaining the skin barrier function, moisturizers such as aloe extract and hyaluronic acid, and care ingredients such as collagen, and polyphenols that can be expected to have effects such as deodorization, antioxidant, and antibacterial effects. A plant-derived tea extract containing a large amount of sucrose has been studied.

  In this type of sanitary thin paper, in order to add absorption performance that does not easily pass through the wiped paper and a firm feeling (strength), etc., each of the sheets constituting the sanitary thin paper is made to have a high rice floor, or a stack of sheets Generally, three or more sheets are stacked by increasing the number of sheets.

As described in paragraph 0034 of Patent Document 1, “the softness of the thin paper such as tissue paper and toilet paper is improved, and the touch feeling to the skin such as moist feeling and smoothness is improved. In addition to the one or more components selected from vegetable oils, animal oils, mineral oils or synthetic oils as the lipophilic component, a hydrophilic component can be obtained. one or polyglycerol fatty acid ester having two or more components, and / or an aliphatic group of C ₈ -C _24, ammonium salts having an aliphatic radical of C ₈ -C ₂₄ polyhydric alcohol or betaine structure as or a quality-improving agent of tissue paper comprising one or more components selected from an amine salt as a constituent, a basis weight of 10 to 40 g / m ² to tissue paper, of the thin paper Have been described, "it contained 0.1 to 10% by weight relative to 燥重 amount.

As described in paragraph 0003, Patent Document 2 has an object of “providing a sanitary thin paper in which the problem of being unsanitary is completely solved”. A sanitary thin paper having the above-mentioned multilayer structure, wherein the amount of artificial runny nose passing through is determined to be 10 mg or less in an artificial runny nose penetration test. The amount (mg) of the artificial runny nose that falls through in the drop-out test is a value obtained through the following steps (1) to (5): (1) Artificial runny nose (saline (urea 2%, sodium chloride) (0.8%, calcium chloride 0.3%, magnesium sulfate 0.8%, ion-exchanged water 96.1%): CMC (carboxyl methylcellulose) 4% aqueous solution = 1: 2, food red (trace amount)) prepared. 2) Filter paper ("ADVANT" manufactured by Toyo Filter Paper Co., Ltd. C
1 (150 mm) ") are stacked and the mass is measured. (3) A test paper folded in half is laminated on the laminated filter paper. (4) 1 ml of an artificial nasal drop was dropped onto the filter paper with a micropipette from a height of 10 mm. (5) After 10 seconds, the test paper is removed, the mass of the filter paper is measured, and the mass difference from before the dropping is defined as the amount of backflow (mg) of the artificial snot. Is described.

JP 09-296389 A JP 2006-342446 A

  In the sanitary thin paper conventionally proposed, in order to ensure the strength of the tissue paper, it is a problem that the cost of the product is increased if each sheet constituting the sheet has a high rice floor area. For the same reason, when the papermaking conditions such as the beating degree of the raw material pulp, the wet paper strength enhancer addition amount, and the press pressure are changed, there is a problem that the bulk and flexibility of the raw material are lowered. Further, the conventional sanitary thin paper has a low liquid diffusion at the time of liquid absorption, and tends to cause a sufficient decrease in strength during use. In particular, tissue paper coated with a drug such as a lotion component may be broken when the nose is bitten due to a decrease in strength, or the touch may be reduced.

  The present invention has been made in order to solve the above-mentioned problems, and the object thereof is a low basis weight, which has a property of being hard to tear at the time of wiping, and having a moist feeling, a smooth feeling, and a softness. An object of the present invention is to provide sanitary thin paper having excellent properties.

  The present inventors are conducting research for improving the wipeability and moist feeling of sanitary thin paper. In the process, it was found that the characteristics of sanitary thin paper were product basis weight, paper thickness, liquid diffusion surface and water absorption, etc., giving the web smoothness and suppleness, and also moist and moist. The present invention, which is a sanitary thin paper that gives the odor, was completed.

The sanitary thin paper according to the present invention for solving the above-mentioned problems is a polyhydric alcohol or betaine structure as a hydrophilic component and at least one selected from vegetable oil, animal oil, mineral oil, or synthetic oil as a lipophilic component A sanitary thin paper containing a chemical solution containing at least one selected from among products as a constituent component, having a product basis weight of 20 to 35 g / m ² , a paper thickness of 130 to 200 μm, and a diffusion area Is 1600 mm ² or more.

According to this invention, it is hard to be broken at the time of wiping, and is excellent in moist feeling, smoothness, softness and wiping property while having a low rice floor area. The lipophilic component gives the web smoothness and flexibility, and the hydrophilic component gives the web a moist and moist feeling. In particular, by setting the diffusion area to 1600 mm ² or more, the liquid is absorbed in a wide area of the web during use, and even a sanitary thin paper with a relatively low rice floor is not easily torn during use.

  Also, by setting the water absorption to 7 seconds or more, during wiping, the liquid spreads on the surface of the paper layer, and the liquid is gradually absorbed into the web, so that the liquid spreads on the web surface, The penetration into the web is performed in a well-balanced manner, and it is easy to wipe off during use.

  In the sanitary thin paper according to the present invention, it is preferable that the lipophilic component is at least one selected from jojoba oil, scrawan, paraffin oil, silicone composition, myristic acid ester, and polybutene.

  In the sanitary thin paper according to the present invention, the lipophilic component is preferably a silicone composition.

  In the sanitary thin paper according to the present invention, the lipophilic component is preferably paraffin oil.

  According to this invention, the sanitary thin paper becomes smooth, the water absorption is appropriately adjusted, and the wiping off of the aqueous material becomes good.

  According to the sanitary thin paper according to the present invention, it is possible to obtain a sanitary thin paper excellent in wiping properties having a moist feeling, smoothness, and softness that is difficult to tear at the time of wiping while having a low rice basis weight.

  Hereinafter, the sanitary thin paper according to the present invention will be described in detail. The present invention is not limited to the following embodiments, and various modifications can be made within the scope of the gist thereof.

The sanitary thin paper according to the present invention is selected from one or more selected from vegetable oil, animal oil, mineral oil or synthetic oil as a lipophilic component, and 1 selected from a polyhydric alcohol or a betaine structure as a hydrophilic component. A sanitary thin paper containing a chemical solution containing at least a seed as a constituent component, wherein the product basis weight is 20 to 35 g / m ² , more preferably 25 to 30 g / m ² , and the paper thickness is 130 to 200 μm. It is preferably 140 to 180 μm, and the diffusion area is preferably 1600 mm ² or more, more preferably 1900 mm ² or more from the viewpoint of easy wiping.
Hereinafter, each component will be described in order.

  Examples of lipophilic components include, but are not limited to, vegetable oils, animal oils, mineral oils, and synthetic oils. The lipophilic component may be single or plural.

  Examples include vegetable oil, jojoba oil, animal oil, sukurawan, mineral oil, paraffin oil, synthetic oil, silicone composition, myristic acid ester (for example, isotridecyl myristate), polybutene, and the like. It is not something.

  As the lipophilic component, a silicone composition and paraffin oil are preferable, and specifically, emulsion types such as amino-modified silicone modified silicone, dimethyl silicone, and polyether-modified silicone, and liquid paraffin are preferable. The content is preferably 0.5 to 5% by mass as a composition ratio in the chemical solution. When the content of the silicone composition and paraffin oil is less than 0.5% by mass, the sanitary thin paper becomes difficult to smooth, and when the content exceeds 5% by mass, the water absorption is inhibited, and especially the aqueous material is wiped off. It will be damaged.

  Examples of hydrophilic components include polyhydric alcohols and betaine structures, but are not limited thereto. The hydrophilic component may be single or plural.

  Examples of polyhydric alcohols include, but are not limited to, glycerin, propylene glycol, sorbitol, and the like.

  Examples of betaine structures include, but are not limited to, glycine betaine, γ-butyrobetaine, dimethyl auyl betaine, dimethylamide betaine, and the like.

  The lipophilic component mainly gives the web smoothness and suppleness, and the hydrophilic component gives the web a wet feeling, that is, a moist feeling.

  As other components, quaternary ammonium salts, cationic surfactants such as amine salts and amines, naturally-derived extract components, emulsifiers, plant extract components, and pH adjustment to the skin, as long as the effects of the present invention are not impaired. Therefore, an organic acid such as citric acid and sodium citrate, an organic acid salt, a sizing agent for adjusting diffusion and water absorption, and the like can be appropriately blended.

Product Basis weight is measured according to JIS P 8124 (1985), basis weight per ply 10 to 20 g / ^{m 2,} a product per 20 to 35 g / ^{m 2.} If a base paper within this range is used, the product has a balanced texture. If the product basis weight is less than 20 g / m ² , tearing may occur during production, and if it exceeds 35 g / m ² , it becomes undesirably bulky. The raw material composition is NBKP 40 to 90% and LBKP 10 to 60%, and more preferably NBKP 45 to 80% and LBKP 20 to 55%. You may mix | blend the recycled used paper derived from a paper pack for adjustment of a water absorption. In the case of tissue paper, a polyamine polyamide epichlorohydrin resin is added as a wet paper strength enhancer in an amount of 0.1 to 0.2% based on solid content. If it is too much, the tissue paper will be hard, and if it is less than this, the wet strength will decrease. The number of plies is not particularly limited, but 2 plies / one set is preferable.

  The paper thickness is measured according to ISO 12625-3 and is 130 to 200 μm per set. If the paper thickness is less than 130 μm, the sanitary thin paper is not preferable because the strength of the sanitary thin paper is insufficient. Furthermore, it is more preferable from the point of a texture in it being 140 micrometers or more and 180 micrometers or less.

The diffusion area is the spread of the liquid 30 seconds after dropping 0.1 ml of distilled water, and if it is less than 1600 mm ² , the spread of the liquid is small, the absorption area at the time of wiping is narrow, and the wiping property is inferior.

  The water absorption is defined by JIS S3104 (1992) “Tissue Paper” (old) and is 7 to 20 seconds. By setting the water absorption to 7 seconds or more, the liquid spreads on the surface of the paper layer during wiping, gradually absorbing and diffusing the liquid, and the sheet during operation is less likely to be broken. When the water absorption is less than 7 seconds, the sheet is easily broken during the wiping operation. This is not preferable, and when it exceeds 20 seconds, the water absorption is low and the wiping property is deteriorated. The diffusion rate and water absorption can be appropriately adjusted by conventional techniques such as the type of lipophilic component, the raw material composition of the base paper, or the addition of a sizing agent.

  Examples of means for supporting the chemical solution on the thin paper base paper include impregnation, spraying, flexographic printing, and gravure printing. In particular, flexographic printing and gravure printing are preferable from the viewpoint of the stability and uniformity of the carrying amount.

  The sanitary thin paper according to the present invention described above is mainly used as a lotion tissue, but is not limited thereto and can be used for various applications.

  The following examples further illustrate the present invention. In addition, this invention is not limited to description of a following example, unless the summary is exceeded.

[Example 1]
(Manufacture of sanitary thin paper)
The chemical solution adjusted with the mass ratio shown in Table 1 in the facial tissue base paper (2 plies / one set) having a basis weight of 29.0 g / m ² consisting of NBKP 50% and LBKP 50% pulp is used as the dry weight of the base paper. The coating amount was 18.0%. As a coating method, a flexo method was used, and coating was performed on one side of a base paper.

(Evaluation)
<Diffusion area>
The diffusion area of the sanitary thin paper according to the present invention is based on a method according to the method of measuring water absorption in JIS S3104 (1992) “Tissue paper” (old). A drop of distilled water (23 ± 1 ° C., 0.1 ml) was dropped from a height of 10 mm onto the test piece with a pipette, and the spread was 30 seconds after the water drop contacted the test piece. The maximum length (mm) in each of the direction and CD direction is measured to determine the product of both. The average value of these five times was defined as the diffusion area. The results are shown in Table 1.
<Water absorption>
The water absorption of the sanitary thin paper according to the present invention is based on the test method of JIS S3104 (1992) “Tissue paper” (old).
A drop of distilled water (23 ± 1 ° C, 0.1 ml) is dropped onto the test piece with a pipette from a height of 10 mm, and the water is completely absorbed from the moment when the water drop contacts the test piece, and the surface of the test piece is reflected. The time until disappeared was measured with a stopwatch (in units of 0.1 second).
This test was performed 5 times in total, and the average value was defined as the water absorption. The results are shown in Table 1.

<Paper thickness>
The paper thickness was measured according to ISO 12625-3 “Tissue paper and tissue products—Determination of thickness, bulking thickness and apparent bulk density” (single sheet thickness). The measuring machine used was a thickness gauge (R1-B type constant pressure type) manufactured by Ozaki Mfg. Co., Ltd. The measurement pressure was 2.0 kPa (measurement load 200 gf, probe diameter 35.7 mm), the probe was lowered at a speed of about 2 mm / second, and the gauge after 5 seconds was read. In addition, one measurement was performed by 1 set of samples, the measurement was repeated 10 times, and the measurement result was averaged. The results are shown in Table 1.

<Product basis weight>
The product basis weight was measured according to the former JIS S3104 (1992). The results are shown in Table 1.

<Density>
The density was calculated by product basis weight (g / m ² ) / paper thickness (μm / sheet). The results are shown in Table 1.

<Tensile strength>
The tensile strength of the sanitary thin paper according to the present invention is determined in accordance with the test method of JIS-S3104 “Tissue paper”. The tensile strength at the time of drying in the flow direction (DMDT: DryMachine Direction Tensile strength), the tensile strength at the time of drying in the width direction (DCDT: Dry
The Cross Direction Tensile Strength (WMDT) and the wet tensile strength (WMDT) were measured. The results are shown in Table 1.

<Wipeability>
As for wiping performance, an actual use test in 7 panelists (4-point evaluation from 0 to 3 points, total 6 points or less: x, total 7 to 11 points: Δ, total 12 to 17 points: ○, total 18 points or more : ◎). The results are shown in Table 1.

<Presence or absence of tearing when wiping viscous material>
As for the presence or absence of tearing when wiping the viscous material, the state of tearing of the sanitary thin paper when observing 0.7 g of the artificial runny nose on the synthetic rubber plate was observed. The results are shown in Table 1.

<Texture>
For the evaluation of the texture of the sanitary thin paper according to the present invention, an average value of a sensory evaluation test by seven panelists was adopted. About each item of moist feeling, smoothness, and softness, the hand-held feeling and the feeling when brought into contact with the skin were evaluated by a four-step evaluation in the same manner as the wiping property. Here, there is no practical problem if the evaluation is ◯ or higher. The results are shown in Table 1.

[Example 2] to [Example 4], [Reference Example 5], [Example 6], [Comparative Example 1] to [Comparative Example 5]
In Examples 2 to 4, Reference Example 5, Example 6, and Comparative Examples 1 to 5, after preparing a chemical solution with the lotion chemical solution composition shown in Table 1 and producing thin paper in the same manner as in Example 1, Sanitary tissue paper was evaluated. The results are shown in Table 1.

Example 1 The diffusion area is 1650 mm 2, the water absorption is 7.0 seconds, and when the viscous material is wiped off, the diffusion is sufficiently performed and easy to wipe off. Also, no tearing occurs when wiping. The paper thickness is 158μ and the softness is ◎.
Example 2 The product basis weight is 28.6 g / m ² and the paper thickness is 142 μm. The diffusion area was 1920 mm ² , and the water absorption was 14.5 seconds. Moist feeling is considered to be related to the diffusion area. The density is 0.20 g / cm ³ and is considered to contribute to the evaluation of smoothness. Moreover, it is thought that it is contributing to softness that a lipophilic component and a hydrophilic component are contained in a predetermined amount.
Example 3 Although the product basis weight and paper thickness are lower than others, the wiping property is ○, and no tearing occurs. A relatively high diffusion area of 1720 mm ² is considered to be acting.
Example 4 The product basis weight is 34.8 g / m ² , the paper thickness is high, and the softness is ◎.
Reference Example 5 Liquid paraffin was used as the lipophilic component, but the same effects as in the other examples were obtained.
Example 6 The paper thickness is 198 μm and the softness is ◎. Moreover, no tearing occurs when wiping.
Comparative Example 1 Although the diffusion area was 1680 mm ² , the product basis weight was low, so that tearing occurred during wiping.
Comparative Example 2 The diffusion area is 1640 mm ² and no tearing occurs during wiping, but the density is as low as 0.17 g / cm ³ and the smoothness is Δ. In addition, the soft evaluation Δ is considered to be influenced by the high paper thickness of 212 μm.
Comparative Example 3 The diffusion area is as low as 1580 mm ² and the moist feeling is Δ.
Comparative Example 4 Although the diffusion area exceeded 1600 mm ² , the product basis weight and paper thickness were low, and tearing occurred during wiping. The water absorption was 5.0 seconds and the wiping property was Δ. This is considered to be due to the fact that no spreading on the surface of the paper layer at the time of wiping was performed.
Comparative Example 5 The diffusion area was 1420 mm ² and the water absorption was 21.0 seconds. Sufficient diffusion was not obtained during wiping, and the sheet was torn. The wiping property was also x.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

Claims (2)

A sanitary thin paper containing a chemical solution containing silicone oil as a lipophilic component and glycerin and / or sorbitol as a hydrophilic component,
The chemical solution includes 0.5% by mass to 5% by mass of silicone oil, and 92.0% by mass to 95.0% by mass of glycerin and / or sorbitol,
The mass ratio of the glycerin and the sorbitol is 100: 0 to 90: 5,
Product basis weight of ^{20g / m 2 ~35g / m 2} , the paper thickness is 130Myuemu～200myuemu, coating amount of the chemical liquid to the dry weight of the base paper is 14.0% to 20.0%,
1 drop (0.1 ml) of distilled water is dropped with a pipette from a height of 10 mm onto the test piece, and the diffusion area of the liquid 30 seconds after the moment when the water drop contacts the test piece is 1600 mm ² or more. Sanitary tissue paper (excluding sanitary tissue paper containing polyphenol-containing plant extracts) .   The sanitary thin paper according to claim 1, wherein the water absorption specified in JIS S 3104 (1992) is 7 to 20 seconds.