JP5430704B2 - Sanitary tissue paper - Google Patents

Description

  The present invention relates to a sanitary thin paper in which a chemical solution is applied to a base sheet, and more particularly to a sanitary thin paper that can efficiently transfer a chemical solution to a user's skin.

  Medical personnel such as nurses and caregivers, hairdressers, etc. have many manual operations and often wash their hands frequently using detergent, so there are many people who suffer from rough hands. For this reason, lotion agents that prevent rough skin on the hands, that is, sanitary thin paper such as paper towels coated with a chemical solution, are used.

  For example, when a user touches a sanitary thin paper with a wet hand, a sanitary thin paper that protects the user's hand skin by transferring a chemical solution to the user's hand skin is known (see, for example, Patent Document 1). ).

Special table 2009-518559 gazette

  However, Patent Document 1 does not specifically describe quantitative design conditions for sanitary thin paper for efficiently transferring a chemical solution to the user's skin. For example, quantitative design conditions are not described for the relationship between the specifications of the base paper used as the base sheet of sanitary thin paper and the components of the chemical solution.

  The present invention has been made in view of the above problems, and is intended to efficiently transfer the chemical applied to the sanitary thin paper to the hand and skin, and to transfer a sufficient amount of the desired chemical to the hand skin. It provides sanitary thin paper with less stickiness to the hands and skin. And it makes it a subject to clarify the quantitative design conditions for transferring a chemical | medical solution efficiently to a user's skin in sanitary thin paper.

To solve the above issues,
The invention described in claim 1
In sanitary thin paper in which a chemical solution is applied to a base sheet made of pulp,
The amount of the chemical solution applied to the base sheet is 4.0 to 5.4 g / m ² ,
The basis weight per ply of the base sheet is 15.5 to 27.3 g / m ² ,
Higher alcohols solid at room temperature (25 ° C.) in the chemical solution, I 7.5 to 27.5% der,
The density of the base sheet is 0.22 to 0.32 g / cm ³ ,
The crepe rate of the base sheet is 6 to 11% .

  ADVANTAGE OF THE INVENTION According to this invention, quantitative design conditions for transferring a chemical | medical solution efficiently to a user's skin can be clarified in sanitary thin paper.

  Hereinafter, embodiments of the sanitary thin paper according to the present invention will be described in detail. Hereinafter, in the embodiment according to the present invention, sanitary thin paper will be described as a paper towel.

  The paper towel which concerns on this invention contains a chemical | medical solution in the base material sheet comprised with the pulp. The base sheet according to the present invention is not limited to a single layer structure, and may be a sheet having a laminated structure in which a plurality of pulp layers are laminated.

  The pulp (raw pulp) used as a raw material for the base sheet is not particularly limited. An appropriate raw material pulp can be selected and used according to the use of the paper towel. As raw material pulp, for example, wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, and the like, more specifically, groundwood pulp (GP), stone ground pulp (SGP), refiner ground pulp (RGP), pressure type Mechanical pulp (MP), chemical mechanical pulp (CGP), semi-chemical pulp (such as ground pulp (PGW), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), bleach chemithermomechanical pulp (BCTMP) Chemical pulp (SCP), kraft pulp (KP) such as hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), soda pulp (AP), sulfite pulp (SP), dissolved pulp (DP), etc. CP), nylon, rayon, polyester, polyvinyl alcohol Synthetic pulp made from (PVA) etc., deinked pulp (DIP), waste paper pulp such as waist pulp (WP), waste pulp (TP), cotton, flax, hemp, jute, manila hemp, ramie etc. One or several kinds of rag pulp, straw pulp, esparto pulp, bagasse pulp, bamboo pulp, kenaf pulp, and other auxiliary pulps such as bast pulp can be appropriately selected and used.

  In particular, if the raw material pulp is a paper towel, it is preferable to blend NBKP (or NUKP) and LBKP (or LUKP). Waste paper pulp may be blended as appropriate, but in terms of texture and the like, it is preferably composed only of NBKP and LBKP, and the blending ratio in that case is NBKP: LBKP = 15: 85-40: 60 Is desirable.

  On the other hand, in papermaking raw materials, other fiber raw materials include polyethylene terephthalate, polybutylene terephthalate, and polyester fibers such as copolymers thereof, polyolefin fibers such as polyethylene, polypropylene, and polystyrene, acrylics such as polyacrylonitrile and modacrylic. Fiber, polyamide fiber such as nylon 6, nylon 66, nylon 12, etc., synthetic fiber such as polyvinyl alcohol fiber, polyvinylidene chloride fiber, polyvinyl chloride fiber, urethane fiber, semi-synthetic fiber such as triacetate fiber, diacetate fiber, screw Include regenerated cellulose fiber such as coarse rayon, copper ammonia rayon, polynosic rayon, lyocell, chemical fiber such as regenerated fiber spun from solution of collagen, alginic acid, chitin acid, etc. It is possible. The polymer constituting the chemical fiber may be in the form of a homopolymer, a modified polymer, a blend, a copolymer or the like.

Raw materials such as pulp fibers are made into a base sheet through, for example, a known papermaking process, specifically, a wire part, a press part, a dryer part, a size press, a calendar part, and the like.
In this papermaking, for example, suitable chemicals such as a dispersant, caustic soda, aqueous ammonia and other pH adjusters, antifoaming agents, preservatives, fluorescent dyes, mold release agents, water resistance agents, flow modifiers, yield improvers, etc. Can be added.

  Moreover, when manufacturing a base material sheet from raw material pulp, it is preferable to add a dry paper strength agent and a wet paper strength agent to this raw material pulp. The wet paper strength agent has the effect of improving the wet tensile strength of the base sheet, and the dry paper strength agent has the effect of improving the fixability of the wet strength paper to the substrate.

  As the dry paper strength agent, for example, polyacrylamide resin, polyvinyl alcohol, carboxymethyl cellulose and the like can be used. Further, as the wet paper strength agent, for example, polyamide / epichlorohydrin resin, urea formaldehyde resin, melamine formaldehyde resin, or the like can be used.

  The dry tensile strength of the base sheet is measured in accordance with the tensile test method of JIS P 8113 (1998), in which the width in the vertical and horizontal directions is measured under the standard conditions specified in JIS P 8111 (1998). Cut to 25 mm and measured. Measurement results are in cN / 25 mm units. It is preferable to use one having a longitudinal direction of 1500 to 4300 cN / 25 mm and a lateral direction of 400 to 2500 cN / 25 mm. The wet tensile strength of the base sheet is measured according to the tensile test method of the vertical tension method of the partial immersion method described in JIS P 8135 (1998) 7.2.1, and the longitudinal direction is 500 to 2000 cN / It is preferable to use one having a width of 25 mm and a lateral direction of 150 to 2000 cN / 25 mm. If these tensile strengths are too low, the sheet is torn when the hand is wiped, and cannot be used as a paper towel. On the other hand, if these tensile strengths are too high, the flexibility of the paper towel will be reduced, and it will be difficult to transfer a sufficient amount of chemical when pressing the hand against the paper towel.

Moreover, it is preferable that the rice tsubo per 1 ply (1P) of a base material sheet shall be 15.5-27.3 g / m < ² > . In addition, the US tsubo is based on the JIS P 8124 (1998) US tsubo measurement method.

Moreover, it is preferable that the paper thickness (thickness when measured with one ply) of the base sheet is 70 to 240 μm. If the paper thickness is less than 70 μm, it is preferable from the viewpoint of improving the softness, but it is difficult to ensure adequate strength as a paper towel. On the other hand, if it exceeds 240 μm, the feel of the paper towel is deteriorated and a feeling of tingling is generated during use.
As a measuring method of the paper thickness, it shall be measured using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) under the conditions of JIS P 8111 (1998). Specifically, confirm that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to adjust the zero point, and then Raise the plunger, place the sample on the test bench, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed. The terminal of the plunger is made of metal so that a plane with a diameter of 10 mm is perpendicular to the plane of the paper, and the load at the time of measuring the paper thickness is about 70 gf. The paper thickness is an average value obtained by performing measurement 10 times.
The density of the one-ply base sheet, and 0.22~0.32g / c ^{m 3,} for the balance of sticky feeling and the transfer of drug solution, 0.25~0.30 g / c ^{m 3} More preferably. And density of the product 0.22 g / c ^{m 3} less is not preferable because the absorbent substrate sheet is lowered. Further, a density of greater than 0.32 g / c m ³ of product, since the substrate sheet is likely to absorb the chemical liquid, hardly performs management of uniform coating weight in the width direction. As a result, the chemical solution is not preferable because a large amount of the chemical solution is applied to the base sheet, and the chemical solution may be excessively transferred to the hand when the hand is wiped.
The density of the product is the paper thickness (1 ply or 2 ply) of the paper towel (1 ply or 2 ply) by the value of paper towel product tsubo prepared under JIS P 8111 or doubled (A) (A). in divided by the B), represents a unit g / c ^{m 3,} at point 3 digits.

The base sheet is preferably creped. Thereby, in addition to softening and increasing the bulk, the surface becomes uneven, thereby increasing the liquid absorption rate.
The crepe rate of the base sheet is desirably 6 to 11 %. Here, the crepe rate is expressed by the following equation .
Crepe rate: ((peripheral speed of the dryer during papermaking) − (peripheral speed of the reel)) / (peripheral speed of the dryer during papermaking) × 100

When the user uses it with wet hands, a chemical solution that can be transferred to the user's hand skin is formed by forming an aqueous gel by adding water.
Any known chemical added to the paper towel can be used as the chemical.
As a component of the chemical solution, a solid oily component such as a higher alcohol solid at normal temperature (25 ° C.) represented by cetanol, a liquid oily component liquid at normal temperature (25 ° C.) represented by liquid paraffin, and the like are appropriately blended. However, it is composed of other raw materials such as polyhydric alcohols such as glycerin, natural moisturizing components such as saccharides and aloe extract, emulsifiers, surfactants and moisture as moisturizing components.
More specifically, as a component of the chemical solution, for example, any one of an anionic surfactant, a cationic surfactant, and a zwitterionic surfactant may be contained as a softening agent, and a moisturizing agent. As glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyhydric alcohols such as polyethylene glycol, saccharides such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose, glycolic drugs and derivatives thereof, One or more kinds of higher alcohols such as cetanol, stearyl alcohol, oleyl alcohol, liquid paraffin, collagen, aloe extract, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or salt thereof, ceramide, etc. Rukoto can. These uses increase the softness and water absorption of the thin paper. Furthermore, you may contain silicones, such as the antioxidant of vitamin C and vitamin E, and polysiloxane. Needless to say, it is necessary to use chemicals that are kind to the skin for the chemical components.

  In addition, the solid oil component ratio in the chemical solution in the chemical solution is preferably 7.5 to 27.5%, more preferably 8.8 to 20.0%. The solid oil component is emulsified and dispersed in the chemical solution. Therefore, at the stage where the chemical solution is applied to the sheet, it is considered that the glycerin and the liquid oil component are absorbed by the pulp fibers of the sheet, and the solid oil component is entangled with the fibers of the sheet. Moreover, when the hand is wiped, the solid component is transferred to the hand, so that the effect of the chemical solution is exhibited. For example, it is considered that the dry feeling of the hand is improved by applying the solid oil component such as applying cream to the hand. For this reason, if there are too few solid oily components in a chemical | medical solution, since sufficient dry feeling will not be expressed, conversely, since it will coat | cover excessively a hand, it will become a cause of stickiness.

In addition, the amount of the chemical solution applied to the base sheet is the coating amount of one sheet (the total amount of one ply when one sheet is composed of one ply or two plies when one sheet is composed of two plies. The coating charge) is preferably 4.0 to 5.4 g / m ² . In the case of two plies, the amount of chemical solution contained in both sheets of the two plies is approximately the same.

  In addition, the ratio of the liquid oil component in the chemical solution in the chemical solution is 22.5% or less, more preferably 17% or less. From the quality evaluation test and sensory evaluation test described later, there is an effect of improving the dry feeling of the hand by applying the liquid oily component to the hand, but if it is contained in a large amount, the dry feeling of the hand is inhibited, so that the sticky result became. This is considered that the liquid oil component generally has a lower molecular weight than the solid oil component, which causes stickiness.

  Further, the glycerin ratio in the chemical solution in the chemical solution is 50% or less, more preferably 30% or less. This is because if the glycerin in the chemical solution exceeds 50%, a sticky feeling tends to be generated. This is thought to be because glycerin generally has a lower molecular weight than the liquid oil component.

  EXAMPLES Next, although an Example is given and this invention is demonstrated more concretely, of course, this invention is not limited to these Examples. In addition, unless otherwise indicated,% in an example shows the mass%.

[Example]
As Examples 1 to 6 and Reference Examples 1 and 2 , paper towels having the values shown in Table 1 in terms of rice tsubo, chemical solution coating amount, softness, and water absorption were prepared.
In addition, the quality of the base material sheet used for preparation of this paper towel, the papermaking conditions, and the physical property of a chemical | medical solution are as showing in Table 1. Further, dry paper strength agent (polyacrylamide resin, trade name: DS4638, manufactured by Seiko PMC, solid content 15 to 25%) and wet paper strength agent (polyamide / epichlorohydrin resin, trade name: WS4024, Seiko PMC) Manufactured, solid content 20-30%) together with a softening agent (solid content 70-90%), the usage amount shown in Table 1 was added.
Moreover, the measuring method of a rice tsubo, a chemical | medical solution application amount, softness, and a water absorption is as follows.

(US tsubo)
The rice tsubo was measured according to JIS P 8124 (1998).
(Amount of chemical applied)
The chemical application amount was calculated based on the difference between the base sheet basis weight when the post-ply chemical solution was not applied during operation and the corresponding base sheet basis weight immediately after application.
(Coating amount g / ^{m 2)} = (basis weight g ^{/ m} 2 immediately after coating) - (the basis weight in the case of not applying g / ^{m 2}
)
(Softness)
The softness was measured based on the handle ohm method according to JIS L1096 E method.
However, the test piece was 100 mm × 100 mm in size, and the clearance was 5 mm. The measurement was performed 5 times each in the longitudinal direction and the lateral direction with 1 ply, and the average value of all 10 times was multiplied by 0.5, and then one decimal point was obtained. The unit was expressed in cN / 100 mm.
(Water absorption)
The water absorption is the “water absorption” described in JIS S-3104, and the number of seconds for absorbing a certain amount of water on the paper towel surface was measured.
The surface of both front sides of the paper towel was measured 5 times, and the average of the total 10 measurements was expressed in seconds.

[Comparative example]
As Comparative Examples 1 to 9, a paper towel having a value as shown in Table 2 in which the rice tsubo, chemical application amount, softness, and water absorption are those shown in Table 2, and as Comparative Examples 10 and 11, the rice tsubo, chemical application amount, softness, and water absorption. A tissue was prepared by applying a lotion having a value shown in Table 2.
Table 2 shows the quality and papermaking conditions of the base material sheet used to create the tissue coated with the paper towel and lotion agent, and the physical properties of the chemical solution.
Moreover, the measuring method of a rice tsubo, a chemical | medical solution application amount, softness, and a water absorption is the same as the Example.

<Quality evaluation test>
About the paper towel which apply | coated the lotion agent of the said Examples 1-6, the reference examples 1 and 2, and Comparative Examples 1-9, the transfer amount and transfer efficiency of a chemical | medical solution were measured, and the result was shown in Table 1 and Table 2. . In addition, about the tissue which apply | coated the lotion agent of the comparative examples 10 and 11, since dry tensile strength and wet tensile strength are low, since a tissue will be torn when a hand is wiped, the quality evaluation test is not performed. The test method is as follows.

(Test method)
First, the weights of two 70 × 70 mm copy sheets as transfer sheets were measured together.
Next, a paper towel coated with the lotion agent of 50 to 50 mm of Examples 1 to 6, Reference Examples 1 and 2, and Comparative Examples 1 to 9 is sandwiched between the two transfer sheets , and 90 × It was placed on a 110 mm rubber plate (KOKUYO S & T stamping mat portable IP-900N), and a 5.0 g plastic plate having a thickness of 100 × 100 mm and a thickness of 1 mm was placed thereon as a weight base.
Next, a weight of 1 kg stainless steel (precision weight of Akiyama Hitoshi Co., Ltd.) was placed on the weight table as a weight, and was allowed to stand for 1 minute.
Next, remove the weight and the weight base, measure the weight of the two transfer papers with the paper towel in between, and measure the transfer amount (g / m ² ) and transfer efficiency (g / m ² ) from the change in weight. %).
Tweezers were used for handling the transfer paper. Moreover, said test was done in the constant temperature room | chamber temperature of 25 degreeC and 60% of humidity.

<Sensory evaluation test>
About the paper towel which apply | coated the lotion agent of the said Examples 1-6, the reference examples 1 and 2, and Comparative Examples 1-9, the touch was evaluated by sensory evaluation of 12 evaluators, and the result was shown in Table 1 and Table. It was shown in 2. In addition, about the tissue which apply | coated the lotion agent of the comparative examples 10 and 11, since dry tensile strength and wet tensile strength are low, when a hand is wiped, a tissue evaluation is not performed. The test method is as follows.

(Test method)
Twelve evaluators scored each paper towel so that the higher the evaluation, the higher the score, and the total score of 12 people was averaged and rounded.

<Comprehensive evaluation>
According to the above quality evaluation test and sensory evaluation test, the paper towels in Examples 1 to 6 have a favorable transfer amount and good touch as compared with Reference Examples 1 and 2 and Comparative Examples 1 to 9. It became clear. In other words, it was revealed that the paper towels in Examples 1 to 6 were those in which the stickiness of the chemical solution was suppressed while the transfer efficiency of the chemical solution to the hand was good.

As described above, according to the present embodiment, the basis weight per ply of the base sheet is 15.5 to 27.3 g / m ² , and the solid oil component in the chemical solution is 7.5. It was revealed that a paper towel having a design condition of ˜27.5% has a good transfer amount and good touch. In other words, it has been clarified that the paper towel has a good chemical solution transfer efficiency to the hand, while the stickiness of the chemical solution is suppressed.
For this reason, it has become possible to clarify quantitative design conditions for efficiently transferring a chemical solution to the user's skin in sanitary thin paper.

  Also, if the paper towel is designed under the above design conditions, when the user uses the paper towel with wet hands, the chemical solution can be efficiently transferred to the user's hand skin. Can be prevented.

  Moreover, by applying a chemical solution to the base sheet, it is possible to give a soft feeling to the paper towel and prevent the user from feeling pain even if the user wipes his / her hand with a rough hand.

Moreover, it becomes possible to transfer a chemical | medical solution to a user's skin more efficiently by the application amount of the chemical | medical solution to a base material sheet being 4.0-5.4 g / m < ² >.

Further, the density of the base sheet and 0.22~0.32g / c ^{m 3,} by a 6-11% crepe ratio of the base sheet, is transferred to a more efficient chemical use's skin It becomes possible.

Claims (1)

In sanitary thin paper in which a chemical solution is applied to a base sheet made of pulp ,
The amount of the chemical solution applied to the base sheet is 4.0 to 5.4 g / m ² ,
The basis weight per ply of the base sheet is 15.5 to 27.3 g / m ² ,
Higher alcohols solid at room temperature (25 ° C.) in the chemical solution, I 7.5 to 27.5% der,
The density of the base sheet is 0.22 to 0.32 g / cm ³ ,
Sanitary thin paper, wherein the crepe rate of the base sheet is 6 to 11%.