JP2011156120A - Tissue and method of manufacturing tissue - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide tissue having softness and smoothness equal to or higher than those of conventional moisturized tissue and having reduced stickiness and tearability in use. <P>SOLUTION: Chemical solution is applied to two-ply tissue such that the amount of chemicals contained in the two-ply paper is 1.5 to 5.0 g/m<SP>2</SP>, and such that the amount of chemicals contained in one of two sheets that constitute the two-ply paper is 0.67 to 1.5 times the amount of chemicals contained in the other sheet. The two-ply tissue applied with a chemical solution is thus configured to have a basis weight per layer of the sheets that constitute the two-ply paper of 10-25 g/m<SP>2</SP>, a thickness of the two-ply paper of 80-175 μm, a dry tensile strength in the CD direction of the two-ply paper of 100-170 cN/25 mm; a wet tensile strength in the CD direction of the two-ply paper of 30-70 cN/25 mm; and a softness of 0.9-1.5 cN/100 mm. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The tissue paper in the domestic market is broadly divided into non-moisturizing tissue and moisturizing tissue. Here, the moisturizing tissue is a tissue produced by applying a moisturizing agent such as glycerin to the paper base tissue, and the non-moisturizing tissue is a general tissue that does not impart a moisturizing agent to the tissue base paper.
The use of tissue paper is mainly for personal use, mainly for facial use, and the moisturizing tissue is considered to be a product specification specialized for use in the nose.
Traditionally, tissue paper has been used for facial applications, mainly for nasal clasps, and so many attempts have been made in the past to improve the touch and quality improvements have been repeated. For example, various softeners are added to the raw material to improve the flexibility of the product. Uses a lot of supple fibers with low fiber texture. Fine creping by sticking when drying wet paper dryer and adjusting per doctor. The softness and smoothness of the paper is achieved by technologies such as forming the surface, improving the surface properties by a calender, and adjusting the raw material beating rate to a low level while maintaining the lateral strength by adjusting the ratio of the web speed. Improvements have been made.

However, in order to further improve quality, non-moisturizing tissue has technical limitations and an increase in the number of people suffering from hay fever and allergic rhinitis has led to the development of moisturizing tissue that is now part of the tissue market. Accounted for.
Heavy users, such as allergic rhinitis and hay fever, bite their nose more than tens of times a day, and the nose and its surroundings are rubbed against tissue, causing mild inflammation and redness. Therefore, for such a user, a material having a small friction on the tissue surface, that is, a material having smoothness is preferably used. Moisturizing tissue is recognized as a differentiated product that has a hygroscopic moisturizing agent such as glycerin applied to the base paper of sanitary thin paper and has an apparently smoother texture than ordinary tissue. For example, a technique for externally attaching an oily substance and a humectant has been introduced (Patent Document 1).

Among the heavy users of moisturizing tissue, there are some users who hate the moisturizing agent that remains on the skin after biting the nose and feels sticky. Regarding this sticky feeling, a method of improving the sticky feeling by changing the drug composition is known as in Patent Document 2.
On the other hand, as a cosmetic application, tissue used for wiping off lotion, milky lotion, base cream, etc., foundation press, lipstick press, etc. is directly touching the skin, and a soft and smooth one is required. Therefore, moisturizing tissue is frequently used as a cosmetic application because of its good touch. However, in cosmetic applications, where moisture absorption such as wiping off of milk is required, moisture retention tissue is slower in moisture absorption than non-humidity tissue. Furthermore, since the strength in a wet state is low, there was also a problem that it was easily broken when wiped off.

Japanese Patent Laid-Open No. 4-9121 JP 2007-143664 A

  An object of the present invention is to provide a tissue paper that has a softness and smoothness equal to or higher than those of conventional moisturizing tissue paper, has less stickiness during use, and has good water absorption. Furthermore, it is to provide tissue paper that is not easily torn after water absorption.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A two-ply tissue paper with a chemical applied to the surface,
The drug content is 1.5 to 5.0 g / m ² for 2 plies, and the amount of the drug contained in one of the sheets constituting the 2 plies is 0.67 to the amount of the drug contained in the other sheet. 1.5 times
The basis weight per layer of the sheet constituting 2 plies is 10 to 25 g / m ² ,
2-ply paper thickness is 80-175 μm,
The dry tensile strength in the CD direction of 2 plies is 100 to 170 cN / 25 mm, and the wet tensile strength in the CD direction of 2 plies is 30 to 70 cN / 25 mm,
The softness is 0.9 to 1.5 cN / 100 mm.
Tissue paper characterized by that.

<Invention of Claim 2>
The tissue paper according to claim 1, wherein the paper density after 180 sets of folding is 0.150 to 0.270 g / cm ³ .

<Invention of Claim 3>
The tissue paper of Claim 1 whose water content of the said chemical | medical solution is 1 to 15 weight%.

<Invention of Claim 4>
The tissue paper of Claim 1 whose moisture content is 7.0-9.0%.

<Invention of Claim 5>
The tissue paper of Claim 1 whose content rate of the oil-based component in a chemical | medical agent is less than 7.0 mass%, and whose content rate of silicone is less than 0.1 mass%.

<Invention of Claim 6>
The tissue paper of Claim 4 whose water absorption is 3.7 to 6.0 second.

<Invention of Claim 7>
A method for producing a two-ply tissue paper having a chemical applied to the surface,
The chemical solution has a chemical content of 1.5 to 5.0 g / m ^{2 on} both sides, and the chemical amount contained in one of the two ply sheets is 0.67 of the chemical amount contained in the other sheet. Apply in a sprayed state to be ~ 1.5 times,
The basis weight per layer of the sheet constituting the two plies of the tissue paper is 10 to 25 g / m ² ,
2-ply paper thickness of 1.5-5.0 g / m ² ,
2-ply dry tensile strength in the CD direction is 100-170 cN / 25 mm, 2-ply wet tensile strength in the CD direction is 30-70 cN / 25 mm,
The softness is 0.9 to 1.5 cN / 100 mm.
A method for producing tissue paper characterized by the above.

  For chemical tissue-supplied tissue paper, by specifying the amount of chemical solution applied, it is possible to make tissue paper sufficiently soft, to suppress stickiness, and to keep wet paper strength, especially wet tensile strength in the CD direction high. did.

It is a figure which shows the apparatus outline | summary of the ply process of the tissue paper which concerns on this invention. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the front. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the side. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the front. It is a longitudinal cross-sectional view of the folded tissue paper. It is a principal part expansion perspective view of the site | part regarding a folding plate. It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). (B) It is a partially broken figure which shows a mode that the tissue paper accommodated in the storage box is taken out. It is a figure which shows the measuring method of the MMD value of tissue paper. It is a principal part enlarged view of the periphery of the chemical | medical solution spraying means shown in FIG. It is a schematic block diagram which shows the other example of a chemical | medical solution spraying means. It is a schematic block diagram which shows the example of another chemical | medical solution spraying means.

Hereinafter, embodiments of the present invention will be described in detail. The “drug content” in the present invention refers to the content of the drug component in a dry state (absolutely dry) contained in the unit area of tissue paper in the standard state of JIS P 8111. The content of components other than water in the chemical solution is shown.
[Example of structure]
The base paper of the tissue paper according to the present invention has a ply structure in which two thin papers (hereinafter also referred to as sheets) are laminated.

[Thin paper]
On the other hand, as raw pulp of the thin paper (sheet) constituting the tissue paper according to the present invention, for example, mechanical pulp such as ground wood pulp (GP), pressure-rise ground pulp (PGW), thermomechanical pulp (TMP), etc .: Semi-chemical pulp (CP), softwood high yield unbleached kraft pulp (HNKP), softwood bleached kraft pulp (NBKP), hardwood unbleached kraft pulp (HNKP), hardwood unbleached kraft pulp (LUKP), hardwood bleached kraft pulp (LBKP) ) And other chemical pulp: used paper pulp such as deinking pulp (DIP) and waste pulp (WP). The raw material pulp can be used by selecting one kind or two or more kinds. Preferably, a chemical pulp containing no filler or foreign matter is preferred. Further, the raw material pulp may contain woody materials such as straw pulp, bamboo pulp, kenaf pulp, and herbs.

  In particular, the raw material pulp is preferably a blend of NBKP and LBKP. 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. In this case, the blending ratio is NBKP: LBKP = 20: 80 to 80:20. In particular, NBKP: LBKP = 30: 70 to 60:40 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, and chemical fiber such as regenerated fiber spun from solution of collagen, alginic acid, chitin, 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 used as a base paper 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. When making this paper, for example, adding a suitable agent such as a dispersant, a dry paper strength enhancer, a wet paper strength enhancer, a softener, a release agent, a coating agent, a pH adjuster such as caustic soda, an antifoaming agent, and a dye. can do.

[US tsubo]
The rice paper weight per sheet of the tissue paper according to the present invention is preferably 10 to 25 g / m ² , more preferably 13 to 16 g / m ² . If the rice tsubo is less than 10 g / m ² , it is preferable from the viewpoint of improving softness, but it is difficult to ensure adequate strength that can withstand use. On the other hand, when the rice tsubo exceeds 25 g / m ² , the entire paper becomes hard, and a feeling of stickiness is generated, resulting in poor touch. In addition, the US tsubo is based on the US tsubo measurement method of JIS P 8124 (1998).

[Crepe rate]
The crepe rate of the primary raw sheet constituting the tissue paper of the present invention is preferably 10 to 30%, more preferably 13 to 20%. 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.

[Medical solution]
Tissue paper of the present invention, the drug combined duplex 1.4~4.5g / m ^2, more preferably 2.3~3.6g / m ² containing. If the drug content is less than 1.4 g / m ² , the effect of the drug is not exhibited, and if it exceeds 4.5 g / m ² , the tissue paper has a sticky feeling and the wet paper strength decreases. The amount of drug contained in both sheets of two plies is substantially the same, and the amount of drug contained in one layer of the sheet is 0.67 to 1.5 times, more preferably 0.77 to 1.3 times that of the other one layer. To be doubled.

  About the chemical | medical solution to provide, a viscosity shall be 1-700 mPa * s at 40 degreeC from a viewpoint of performing high-speed processing. More preferably, it is set to 50 to 400 mPa · s (40 ° C.). If it is less than 1 mPa · s, the chemical solution is likely to be scattered on rolls such as anilox roll, printing plate roll, and gravure roll, and conversely if it is more than 700 mPa · s, it is difficult to control the amount applied to each roll or continuous sheet. It is desirable that the components contain 70 to 90% polyol, 1 to 15% moisture, and 0.01 to 22% functional drug.

  Polyols include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, and sugars such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, and trehalose.

  Functional agents include softeners, surfactants, inorganic and organic fine particle powders, oily components, and the like. Softeners and surfactants have the effect of imparting flexibility to the tissue and smoothing the surface, and anionic surfactants, cationic surfactants and zwitterionic surfactants are applied. Inorganic and organic fine particle powders have a smooth surface. The oil component has a function of improving lubricity, and higher alcohols such as liquid paraffin, cetanol, stearyl alcohol, and oleyl alcohol can be used.

  In addition, as a functional agent, one of a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc. A moisturizing agent such as any combination can be added.

Deodorants such as flavors, emollients such as various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids, etc. An agent can be appropriately blended. Furthermore, you may contain the antioxidant of vitamin C and vitamin E.
Among the above components, it is preferable to use a polyhydric alcohol such as glycerin or propylene glycol as a main component in order to stabilize the viscosity and applied amount of the chemical solution.
The viscosity of the chemical solution is preferably 1 to 700 mPa · s (40 ° C.). The temperature at the time of chemical solution application is preferably 30 ° C to 60 ° C, preferably 35 ° C to 55 ° C.

  Among the above components, oily components such as higher alcohols and liquid paraffin are added to increase the slipperiness of the sheet surface. The amount added to these chemicals is less than 7% by mass, more preferably 2%. ˜4 mass%. Silicones such as polysiloxane added as an antifoaming agent for the chemical solution are added to the chemical solution in an amount of less than 0.1% by mass, more preferably 0.02 to 0.06% by mass. Since both the oily component and the silicone have water repellency, the water absorption of the tissue paper is lowered when the addition amount is more than specified. On the other hand, if no addition is performed at all, the smoothness of the sheet and the operability for applying the chemical solution will decrease.

[Grant amount]
The application amount was calculated from the difference between each sheet basis weight when not applying the chemical solution after ply during operation and the corresponding sheet basis weight immediately after application.
(Application amount g / m ²⁾ = (basis weight g / m ² immediately granted) - (basis weight g / m ² in the case of not imparting)
The applied amount of both surface layers or the applied amount of both surfaces is the total applied amount per unit area of the plyed tissue paper sheet, and the applied amount of each sheet is added.

[Drug content]
The drug content indicates the content of the drug component in a dry state (absolutely dry) included in the unit area of tissue paper in the standard state of JIS P 8111. Specifically, other than the moisture in the applied chemical solution The content of the component shall be indicated. The unit area of the tissue paper is an area of the plyed sheet viewed from a viewpoint perpendicular to the plane, and does not mean the total area of each plyed sheet and its front and back surfaces.

[Drug content]
The chemical content is a mass excluding moisture in a chemical solution contained in a tissue paper product of a predetermined mass with a tissue paper product of a predetermined mass conditioned under JIS P 8111 as a denominator (A) (g). (B) Using (g) as a molecule, the ratio obtained by dividing (B) by (A) is represented by (%).
(Drug content%) = (B) ÷ (A) × 100 (%)

[Paper thickness]
The paper thickness of the tissue paper according to the present invention is 80 to 175 μm, more preferably 90 to 160 μm in a two-ply state. If the paper thickness is less than 80 μm, it is preferable from the viewpoint of improving the softness, but it is difficult to ensure adequate strength as tissue paper. On the other hand, if it exceeds 175 μm, the texture of the tissue paper is deteriorated and a feeling of tingling is generated during use.

  As a measuring method of the paper thickness, it shall be measured in a 2-ply state using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) under the conditions of JIS P 8111 (1998). (According to JIS P 8118 (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 paper thickness is an average value obtained by performing measurement 10 times.

[Tensile strength]
The tensile strength of the tissue paper according to the present invention is measured in a two-ply state.
The dry tensile strength is measured according to the tensile test method of JIS P 8113 (1998). Among them, it is cut into a width of 25 mm in the vertical direction and the horizontal direction under the standard conditions defined in JIS P 8111 (1998).

  The dry tensile strength of the tissue paper according to the present invention is 180 to 400 cN / 25 mm in the MD direction, more preferably 250 to 350 cN / 25 mm, and 100 to 170 cN / 25 mm in the CD direction, more preferably 115 to 160 cN / 25 mm. The ratio of the direction / CD direction is preferably 1.5 to 3.0.

  The wet tensile strength is determined according to JIS P 8135 (1998). The wet tensile strength of the tissue paper is 140 to 190 cN / 25 mm in the MD direction, more preferably 150 to 175 cN / 25 mm, and 30 to 70 cN / 25 mm, more preferably 40 to 70 cN / 25 mm, more preferably 50 in the CD direction. ˜65 cN / 25 mm.

[Softness]
The softness value of the tissue paper of the present invention is 0.9 to 1.5 cN / 100 mm, more preferably 0.9 to 1.4 cN / 100 mm. The softness here is measured based on the handle ohm method according to the 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 represented by 2 digits of decimal point and expressed in units of cN / 100 mm.

〔Moisture percentage〕
It is desirable that the moisture content of the product (JIS P 8111 (1998)) is 7.0 to 9.0%, more preferably 7.5 to 9.0%.
[Water absorption]
The water absorption is the “water absorption” described in JIS S 3104 (1992), and is obtained by measuring the number of seconds for absorbing a certain amount of water on the tissue surface. The surface on both sides of the tissue is measured 5 times, and the average of the total 10 measurements is expressed in seconds. The water absorption is preferably 3.7 to 6.0 seconds, and more preferably 4.0 to 5.0 seconds.

〔Growth rate〕
The elongation in the MD direction of the product is desirably 11.0 to 15.0%. The elongation rate here is measured using “Universal Tensile Compression Tester TG-200N” manufactured by Minebea Co., Ltd.

[Static friction coefficient]
The static friction coefficient is measured by the following method according to JIS P 8147 (1998).
The tissue paper peeled off in one ply is attached to the acrylic plate so that the outer surface of the tissue paper is on the outside. Wrap tissue paper around a 100 g weight with 2 plies and place it on the tissue on the acrylic plate. Tilt the acrylic plate and measure the angle at which the weight slides down. The angle is measured four times in the MD direction and four times in the CD direction for a total of eight times, the average angle is calculated, and the tangent value is taken as the coefficient of static friction.

[MMD]
MMD is the average deviation MMD of the static friction coefficient. MMD is one of the indices of smoothness. The smaller the numerical value, the smoother, and the larger the numerical value, the less smooth.
As a method for measuring the MMD value, as shown in FIG. 11A, a tension of 20 g / cm is applied to the contact surface of the friction element 112 in a predetermined direction (downward and rightward in FIG. 11A). While being brought into contact with the surface of the tissue paper 111, which is the measurement sample, at a contact pressure of 25 g, it is moved 2 cm at a speed of 0.1 cm / s in the same direction as the direction in which the tension is applied. The friction coefficient at this time was measured using a friction feeling tester KES-SE (manufactured by Kato Tech Co., Ltd.), and the value obtained by dividing the friction coefficient by the friction distance (movement distance = 2 cm) was defined as the MMD value.
The friction element 112 has 20 piano wires P with a diameter of 0.5 mm adjacent to each other, and has a contact surface formed so that the length and width are both 10 mm. The contact surface is formed with a unit bulging portion whose tip is formed of 20 piano wires P (curvature radius 0.25 mm).
FIG. 11A schematically shows the friction element 2, and FIG. 11B shows an enlarged view of a portion surrounded by a dashed line in FIG. 11A.

[Product density]
The tissue paper according to the present invention is folded by an interfolder or the like, and is cut into a product size at any stage before or after the folding process. For example, 180 sets are packed into a product. The paper density after 180 sets of folding is preferably 0.150 to 0270 g / cm ³ , more preferably 0.170 to 0.0.230 g / m ³ . 0.150 g / cm ³ can not be obtained to the moist feeling and smoothness lower than, higher than 0.270 g / cm ^3, with the thickness of tissue paper will out sticky feeling is impaired, water absorption worsens End up.
The product density is the paper thickness (D) of tissue paper (2 ply) according to “PEACOCK G type”, which is a double value (C) of the tissue paper product tsubo conditioned under JIS P 8111 conditions. The unit is expressed in g / cm ³ and 3 decimal places.

[Example of manufacturing method]
The tissue paper of the present invention described above can be manufactured as follows. In FIG. 1, the outline | summary of the apparatus X1 of the ply process of the tissue paper concerning this invention was shown. 1 is preferably performed by a ply machine which is an integrated apparatus.

  The base paper produced by the paper machine is creped as a continuous sheet, calendered, and wound up to form a primary raw roll JR (generally also called jumbo roll).

  The continuous sheets S <b> 11 and S <b> 12 are laminated by a laminating roller 51 to form two plies, and are calendered by a ply machine calender 52 as needed, and sent to the chemical solution applying means 53. It is preferable that the chemical solution is applied only from one side of each ply, and the surfaces to which the chemical solution is not applied are overlapped, and the ply is fixed later. Since the infiltration of the chemical solution does not occur on the surface side to which the chemical solution is not directly applied, the paper strength is unlikely to decrease, and the paper strength can be kept high as a whole. As the method for applying the chemical solution, any of the known application methods such as dipping, spraying, flexographic coating, and gravure coating can be used, but the chemical solution can be uniformly applied to the entire application surface, and the pressing of the paper can be performed. It is preferable to perform chemical application by spraying without accompanying. By applying chemicals by spraying, the chemical solution does not penetrate deeply into the paper layer and backside compared to when other application methods are implemented, and it is easy to stay on the surface. In addition, surface smoothness and soft feeling can be achieved with a small amount of chemical solution. When the chemical solution is applied by spraying, the fiber layer is not pressed between the rolls in the state of containing the chemical solution as seen in the gravure, flexo, roll coating, etc. You can get a thick tissue paper. In the ply process of FIG. 1, two chemical spraying means 53A and 53B are provided, and a chemical is applied to each surface of a two-ply continuous sheet.

  Although it does not specifically limit as the chemical | medical solution spraying means 53, In addition to the case of a nozzle type spray system, you may use a rotor dampening spray system.

  Among these, the types of spray nozzles in the nozzle spray device include an empty conical nozzle that sprays in an annular shape, a full conical nozzle that sprays in a circular shape, a full pyramid that sprays in a square shape, a full nozzle and a fan Type nozzles, etc., so that the chemical solution is sprayed uniformly in the width direction of the sheet, the nozzle diameter, the number of nozzles, the nozzle arrangement pattern, the number of nozzles, or the spray distance, spray pressure, spray angle, and spray The concentration and viscosity of the liquid can be appropriately selected and used.

  Moreover, about the method of atomizing in a nozzle type spraying apparatus, it can select and use two types, a 1 fluid system or a 2 fluid system. Of these, the one-fluid spraying method applies pressure directly to the chemical liquid to be sprayed using compressed air and sprays mist droplets from the nozzle, or blows air into the nozzle from a fine hole opened on the side of the nozzle near the jet outlet. This is a method of sucking and spraying mist. In addition, the two-fluid spraying method is mixed with a liquid sprayed with compressed air inside the nozzle, an internal mixing type that atomizes, mixed with a liquid sprayed with compressed air outside the nozzle, an external mixing type that atomizes, and atomized Examples include a collision type system in which mist droplet particles collide with each other to further homogenize and atomize the mist droplet particles.

  On the other hand, the rotor dampening coating device is a device that sends out the liquid to be sprayed onto a disk that rotates at high speed, and makes the liquid atomized by the centrifugal force of the disk, and controls the particle size of the droplets by changing the rotational speed of the disk. The amount of spray liquid (applied amount) is controlled by changing the amount of liquid fed onto the disk. Is. Rotor dampening applicator can apply a small amount of spray liquid evenly on the surface of pigment coated paper while suppressing spraying of mist droplets, and it is easy to adjust the spraying speed and the particle size of mist. There are certain advantages.

  In order to spray the chemical solution uniformly on the sheet surface, the atomized particle size of the atomized chemical solution is preferably as small as possible. However, if the mist droplets become too fine, the mist droplets will be swept away by the rebound of the sprayed air or the air accompanying the sheet surface, and the mist droplets will not easily adhere to the sheet surface, especially when the traveling speed of the sheet is high. Become. For this reason, in the spray application system, the spray distance, spray pressure, spray angle, spray speed, and in the case of the two-fluid system, the mixing ratio of the chemical liquid for spraying and the compressed air, the concentration and viscosity of the chemical liquid, etc. It can be adjusted appropriately to adjust the particle size to suit the application conditions. If the influence of the accompanying air is large during spraying, installation of a suction device or baffle plate (rectifying plate) to remove the accompanying air, Further, a charged electrode (electrostatic spraying method) or the like may be added to apply high voltage to the tip of the spray nozzle to charge the mist droplet particles to improve the appropriate adhesion of the mist to the pigment coated paper.

  The mist droplets floating as mist without being applied to the sheet surface can be sucked and collected and sprayed again.

  FIG. 12 shows an example of a nozzle type spray method, particularly a two-fluid type chemical spray device 53A (53B). This device 53A has a chemical liquid passage 53a at its center and an air passage 53b around it, and atomizes the chemical liquid ejected from the tip of the chemical liquid passage 53a with the air discharged from the air passage 53b. The chemical solution is sprayed in a substantially conical shape. Reference numeral 53c denotes an external protective casing that protects the nozzle from paper dust and the like, and can clean the nozzle with air that passes through the purge air passage 53d if necessary. This kind of chemical spraying device 53A (53B) can be provided at one or more intervals in the width direction of the sheet.

  As described above, the mist droplets are washed away by the rebound of the sprayed chemical liquid or the air accompanying the surface of the sheet, and particularly when the traveling speed of the sheet is high, the mist droplet is difficult to adhere to the sheet surface. Therefore, if necessary, as shown in FIG. 13, chemical spraying is performed by air ejected from the air supply passage 53f formed in the casing 53e from around the one-fluid or two-fluid chemical spraying means (spray nozzle) 53. When the spray chemical liquid from the means (spray nozzle) is surrounded, the chemical liquid can be suitably applied to the sheet S2.

  FIG. 14 shows an example of a rotor dampening coating device 53X. In this case, a rotating rotor 53o is provided in a cover housing chamber 53p provided as necessary, and a chemical solution is sprayed onto the sheet S2 from an ejection port 53q of the rotating rotor 53o.

  It is preferable that the two-ply continuous sheet to which the chemical solution is applied is provided to the contact embossing roller 54B and the roller roll 54A and fixed by performing a contact embossing (knurling) process. The contact embossing is preferably applied uniformly in the vertical direction with a width of 1 to 10 mm at positions of 1/10 to 1/20 with respect to the paper width from both sides. Any of the known methods, such as fixing the ply with an adhesive, may be used. However, when using an adhesive, there is a problem that the touch tends to become hard, and it is easy to peel off when applying a chemical solution. It can be said that the use of embossing is more preferable.

A continuous sheet of 2 plies with contact embossing is directly cut into a product size after being subjected to folding processing by being directly applied to a rotary interfolder or the like, or after being cut into a product width by a slitter 55, The winding material is taken up by the winding drum 56 as a secondary roll roll R, folded, and stored in a paper box.
In addition, although the structure which provides a chemical | medical solution before contact embossing is taken in this form, it is good also as a structure which provides a chemical | medical solution after contact embossing.

  The secondary raw roll described above is subjected to a folding process particularly in tissue paper products. As the folding process, a known method such as a rotary interfolder or a multi-stand interfolder can be used, but it is more preferable to use a multi-stand interfolder with high productivity.

[Multi-stand type inter folder]
A large number of secondary web rolls R are set in a multi-stand type interfolder, and a secondary continuous sheet is drawn out from the set secondary web roll R to be folded and laminated to produce a tissue paper bundle. Hereinafter, an example of the multi-stand type interfolder will be described.

  2 and 3 show an example of a multi-stand type interfolder. Reference numeral 2 in the figure denotes secondary raw rolls R, R... Set on a secondary raw roll support portion (not shown) of the multi-stand type interfolder 1. The secondary raw rolls R, R... Are set side by side in a direction (the horizontal direction in FIG. 2 and the front-to-back direction in FIG. 3) perpendicular to the illustrated plane. Each secondary raw roll R has slits in the width of tissue paper product in the above-described manufacturing equipment and manufacturing method of the secondary raw roll for tissue paper products. It is wound and set in double width.

  The continuous belt-like secondary continuous sheets 63A and 63B unwound from the secondary raw roll R are guided by guide means such as guide rollers G1 and G1 and fed into the folding mechanism section 60. Further, the folding mechanism section 60 is provided with a folded plate group 64 in which a necessary number of folded plates P, P... Are arranged in parallel as shown in FIG. For each folded plate P, guide rollers G2, G2 and guide round bar members G3, G3 for guiding a pair of continuous secondary continuous sheets 63A or 63B are respectively provided at appropriate positions. Further, below the folded plates P, P..., A conveyor 65 is provided that receives and conveys the laminated band 67 that is stacked while being folded.

  A folding mechanism using this type of folded plates P, P... Is a known mechanism, for example, from US Pat. As shown in FIG. 5, this type of folding mechanism folds each continuous secondary continuous sheet 63A, 63B... In the Z-shape and is adjacent to the adjacent secondary continuous sheets 63A, 63B. Stack the ends together.

  FIGS. 6 to 9 show in detail the portions of the folding mechanism 60 that are particularly related to the folded plate P. FIG. In the folding mechanism 60, a pair of continuous secondary continuous sheets 63A and 63B are guided for each folded plate P. At this time, the continuous secondary continuous sheets 63A and 63B are guided by the guide round bar members G3 and G3 while being shifted in position so that the side end portions do not overlap each other.

  The continuous secondary continuous sheet that overlaps the lower side when guided by the folded plate P is the first continuous secondary continuous sheet 63A, and the continuous secondary continuous sheet that overlaps the upper side is the second continuous sheet. As shown in FIGS. 5 and 7, these continuous secondary sheets 63A and 63B are second continuous secondary continuous sheets of the first continuous secondary continuous sheet 63A. The side end e1 that does not overlap the sheet 63B is folded back to the upper side of the second continuous secondary continuous sheet 63B by the side plate P1 of the folded plate P, and as shown in FIG. 5 and FIG. The side end portion e2 of the continuous secondary continuous sheet 63B that does not overlap the first continuous secondary continuous sheet 63A is folded downward so as to be drawn under the folded plate P from the slit P2 of the folded plate P. . At this time, as shown in FIGS. 5 and 9, the side end e3 (e1) of the continuous secondary continuous sheet 63A stacked while being folded in the upstream folded plate P is second from the slit P2 of the folded plate P. Are guided between the folded portions of the secondary continuous sheet 63B. In this way, each continuous secondary continuous sheet 63A, 63B... Is folded in a Z shape and the side ends of adjacent continuous secondary continuous sheets 63A and 63B are crossed together, so that the product is used. In some cases, when the top tissue paper is pulled out, the side edge of the next tissue paper is pulled out.

  As shown in FIG. 2, the laminated band 70 obtained in the multi-stand type interfolder 6 as described above is cut (cut) at a predetermined interval in the flow direction FL by the cutting means 66 at the subsequent stage, and the tissue is cut. This tissue paper bundle 30a is further stored in the storage box B in the subsequent equipment as shown in FIG. 10 (a). In the multi-stand type interfolder 1 as described above, the paper direction of the laminated band 70 is the vertical direction (MD direction) along the flow direction FL, and the horizontal direction along the direction orthogonal to the flow direction. Direction (CD direction). For this reason, the direction of the paper of the tissue paper constituting the tissue paper bundle 67a obtained by cutting the laminated band 70 into a predetermined length is along the folding direction of the tissue paper as shown in FIG. The horizontal direction (CD direction) and the vertical direction (MD direction) along the direction orthogonal to the folding direction of the tissue paper.

  FIG. 10B shows an example of a product in which the tissue paper bundle 67a is stored in the storage box B. A perforation M is provided on the upper surface of the storage box B, and a part of the upper surface of the storage box B is broken by the perforation M so that the upper surface of the storage box B is opened. The opening is covered with a film F having a slit at the center, and the tissue paper T can be taken out through the slit provided in the film F.

  By the way, as described above, the direction of the paper of the tissue paper constituting the tissue paper bundle 67a is the horizontal direction (CD direction) along the folding direction of the tissue paper, as shown in FIG. When the tissue paper T is pulled out from the storage box B, the pulling direction is along the horizontal direction (CD direction) of the tissue paper T.

  In order to confirm the effect of the present invention, the tissue paper (with the above-mentioned multi-stand type interfolder using the secondary raw roll manufactured by the method of manufacturing the secondary raw roll X1 for the tissue paper product shown in FIG. Example 1 was manufactured, and the results of evaluating the paper quality of the product together with the comparative example and the reference example are shown in Table 1. All of the comparative examples are commercially available products, Comparative Example 1 is a non-humidifying general-purpose tissue paper, and Comparative Examples 2 to 4 are moisturizing lotion-type tissue papers. In addition, examples in which doctor chamber type flexographic transfer is used for chemical application are shown as Reference Examples 1 to 3. The measuring methods of rice tsubo, paper thickness, tensile strength, elongation rate, softness, static friction coefficient, and moisture content are as described in the section of the embodiment for carrying out the invention. The drug content indicates the ratio of the dry weight of the drug to the tissue paper basis weight.

  Paper quality was evaluated about Examples 1-6, Comparative Examples 1-6, and Reference Examples 1-3. Examples 1 to 6, Comparative Examples 1 to 6, and Reference Example 1 For 12 people, sensory evaluation was performed based on the following criteria for softness, smoothness, thickness, and moist feeling.

The sensory evaluation was performed on the basis of the following criteria, with all results of Comparative Example 1 being a non-humidifying tissue paper set to 3.
5: Very good 4: Excellent 3: Equivalent to the standard 2: Inferior 1: Notably inferior Further, the chemical-coated tissue paper was also evaluated for the presence or absence of stickiness.
○: Little sticky feeling ×: Clearly sticky feeling

The tissue paper according to the present invention showed high values of the dry tensile strength and the wet tensile strength in the CD direction as compared with a commercially available moisturizing tissue. The wet tensile strength in the CD direction was higher than that of conventional general-purpose tissue paper.
In the sensory evaluation, it was found that the tissue paper according to the present invention has a feeling of thickness equal to or greater than that of the moisturizing tissue, softness, smoothness, moist feeling, and reduced stickiness seen in the moisturizing tissue. .

  The tissue paper of the present invention can be used for tissue paper that is used for wiping, particularly for wiping the body, and for facial use.

Claims (7)

A two-ply tissue paper with a chemical applied to the surface,
The drug content is 1.5 to 5.0 g / m ² for 2 plies, and the amount of the drug contained in one of the sheets constituting the 2 plies is 0.67 to the amount of the drug contained in the other sheet. 1.5 times
The basis weight per layer of the sheet constituting 2 plies is 10 to 25 g / m ² ,
2-ply paper thickness is 80-175 μm,
The dry tensile strength in the CD direction of 2 plies is 100 to 170 cN / 25 mm, and the wet tensile strength in the CD direction of 2 plies is 30 to 70 cN / 25 mm,
The softness is 0.9 to 1.5 cN / 100 mm.
Tissue paper characterized by that. The tissue paper according to claim 1, wherein the paper density after 180 sets of folding is 0.150 to 0.270 g / cm ³ .   The tissue paper of Claim 1 whose water content of the said chemical | medical solution is 1 to 15 weight%.   The tissue paper of Claim 1 whose moisture content is 7.0-9.0%.   The tissue paper of Claim 1 whose content rate of the oil-based component in a chemical | medical agent is less than 7.0 mass%, and whose content rate of silicone is less than 0.1 mass%.   The tissue paper according to claim 5, wherein the water absorption is 3.7 to 6.0 seconds. A method for producing a two-ply tissue paper having a chemical applied to the surface,
The chemical solution has a drug content of 1.5 to 5.0 g / m ² with 2 plies, and the amount of drug contained in one of the two ply sheets is 0. 0 of the amount of drug contained in the other sheet. Apply in a spray state to be 67-1.5 times,
The basis weight per layer of the sheet constituting the two plies of the tissue paper is 10 to 25 g / m ² ,
2-ply paper thickness of 1.5-5.0 g / m ² ,
2-ply dry tensile strength in the CD direction is 100-170 cN / 25 mm, 2-ply wet tensile strength in the CD direction is 30-70 cN / 25 mm,
The softness is 0.9 to 1.5 cN / 100 mm.
A method for producing tissue paper characterized by the above.

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