WO2017169416A1

WO2017169416A1 - Production device for sanitary tissue paper and production method for sanitary tissue paper

Info

Publication number: WO2017169416A1
Application number: PCT/JP2017/007309
Authority: WO
Inventors: 奨与那覇
Original assignee: 大王製紙株式会社
Priority date: 2016-03-31
Filing date: 2017-02-27
Publication date: 2017-10-05
Also published as: JP2017176684A; JP6684135B2

Abstract

The present invention comprises: a microcapsule coating device 40 that coats microcapsules on a base paper P for sanitary tissue paper; and a liquid coating device 30 that coats a lotion solution on to the base paper P for the sanitary tissue paper. The microcapsule coating device coats microcapsules on to the base paper by using electrostatic coating. As a result, coating whereby microcapsules are mixed into the lotion solution is avoided and, during microcapsule function adjustment, lotion solution replacement work is avoided and the workload and work time are reduced thereby improving workability.

Description

Sanitary tissue paper manufacturing apparatus and sanitary tissue paper manufacturing method

The present invention relates to a thin paper containing a chemical solution containing a humectant and the like.

When a runny nose occurs due to a cold or hay fever, tissue paper as a sanitary thin paper is generally used to bite the nose. However, when the frequency of use increases, the oil content of the nasal epidermis is lost and rubbed. I feel pain. For this reason, in recent years, lotion containing glycerin, which is a moisturizing component, has been applied, and tissue papers that are smooth and have a smooth feel have been distributed (see, for example, Patent Document 1).
In addition, a tissue paper has been proposed in which a microcapsule having functionality such as a fragrance is added to the lotion to give a refreshing feeling and to relieve mental stress due to rhinitis or nasal congestion (see, for example, Patent Document 2). .

Special table 2007-534386 JP 2013-78373 A

As described above, in the tissue paper coated with the chemical solution in which the microcapsule is added to the lotion, when adjusting the functionality by the microcapsule, for example, when the microcapsule contains a fragrance, the intensity of the scent In order to change the type and type, it is necessary to use another adjusted chemical solution, which requires replacement work, and therefore requires a great deal of labor and time, such as switching work and cleaning the equipment to be applied. It was.
The above-mentioned problem is not limited to tissue paper, but can be a problem that can occur with respect to the entire sanitary thin paper.

The purpose of the present invention is to improve the productivity of sanitary thin paper coated with microcapsules and lotion chemicals.

In order to solve the above problems, the invention according to claim 1 is a sanitary thin paper manufacturing apparatus,
A microcapsule applicator for applying microcapsules to a sanitary thin paper base;
A liquid application device for applying a lotion chemical solution to a sanitary thin paper base,
The microcapsule coating apparatus applies the microcapsules to the base paper by electrostatic coating.

The invention according to claim 2 is the sanitary thin paper manufacturing apparatus according to claim 1,
The liquid applying apparatus is a rotor dampening printing apparatus.
The invention according to claim 3 is the sanitary thin paper manufacturing apparatus according to claim 1 or 2,
The microcapsules are characterized in that any one of urethane, urea-melamine, and urea-formalin is used as a main raw material.

Invention of Claim 4 in the manufacturing method of a sanitary thin paper,
A microcapsule application process for applying microcapsules to a sanitary thin paper base;
A liquid application process for applying a lotion chemical to a sanitary thin paper base,
The microcapsule application step is characterized in that the microcapsules are applied to the base paper by electrostatic application.

Invention of Claim 5 is a manufacturing method of the sanitary thin paper of Claim 4,
The liquid application process is performed by a rotor dampening printing method.
Invention of Claim 6 is a manufacturing method of the sanitary thin paper of Claim 4 or 5,
The microcapsule coating step is characterized in that the microcapsule is mainly coated with any one of urethane, urea-melamine, and urea-formalin.

According to the sanitary thin paper manufacturing apparatus or manufacturing method of the present invention, since it is not necessary to mix microcapsules into the lotion chemical solution, only the microcapsules to be applied need to be replaced even when adjusting the functionality of the microcapsules. Since the lotion chemical solution is not exchanged, the work load can be reduced and the work time can be reduced, and the productivity of sanitary thin paper can be improved.

It is a schematic block diagram of the manufacturing apparatus of the sanitary thin paper which is embodiment of this invention. It is a block diagram which shows the detail of the microcapsule application | coating apparatus of the manufacturing apparatus of FIG. It is explanatory drawing which shows the paper supply process in the manufacturing method of a sanitary thin paper. It is explanatory drawing which shows a microcapsule application | coating process. It is explanatory drawing which shows a liquid application process. It is a table | surface which shows the conditions and result of the comparative test of operativity and sensory evaluation by an Example and a comparative example.

[Outline of Embodiment of the Invention]
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a sanitary thin paper manufacturing apparatus according to an embodiment of the present invention.
This sanitary thin paper manufacturing apparatus 10 is a manufacturing apparatus whose main purpose is to apply lotion chemicals and microcapsules to a base paper of sanitary thin paper.

[Base paper for sanitary thin paper]
The base paper of the sanitary thin paper of the present invention is preferably a two-ply laminate of crepe paper having a basis weight of 10 to 18 g / m ^{2 according} to JIS P 8124 (1998). Further, the paper thickness measured with a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Mfg. Co., Ltd.) under the conditions of JIS P 8111 (1998) is 80 to 250 μm, preferably It is desirable that the thickness is 100 to 200 μm, more preferably 130 to 180 μm. The longitudinal direction of dry tensile strength (hereinafter also referred to as dry paper strength) specified in JIS P 8113 (1998) is 200 to 700 cN / 25 mm, preferably 250 to 600 cN / 25 mm, particularly preferably 300 to 600 cN with 2 plies. On the other hand, the lateral direction is 50 to 250 cN / 25 mm, preferably 80 to 220 cN / 25 mm, particularly preferably 100 to 200 cN / 25 mm with 2 plies. If the dry tensile strength is too low, troubles such as paper breakage and elongation at the time of production and use are likely to occur, and if it is too high, the touch becomes stiff during use. In addition, as a sanitary thin paper in this invention, tissue paper, toilet paper, paper towel, etc. are mentioned.

In addition, as the raw paper according to the present invention, known raw materials can be used. In particular, the pulp raw material is preferably composed of NBKP and LBKP. Waste paper pulp may be blended as appropriate, but it is preferably composed only of NBKP and LBKP of virgin pulp because it is compatible with an aqueous lotion solution and desirable in terms of the resulting texture. In this case, the mixing ratio (JIS （P 8120) is preferably NBKP: LBKP = 10: 90 to 70:30, and particularly preferably NBKP: LBKP = 30: 70 to 60:40.

[Lotion solution applied to sanitary thin paper]
In the present invention, the lotion chemical is applied to the base paper of the sanitary thin paper. The lotion solution is preferably applied to both sides of the base paper laminated on the two plies. The application amount of the lotion chemical in the present invention is preferably in the range of 20 to 30% by weight of the base paper weight (US tsubo).
The lotion chemical solution contains water and a polyol. In particular, those containing 70 to 90% polyol and 10 to 20% water, particularly preferably 0.01 to 22% further containing a functional drug. Such an aqueous chemical solution has an action of extending the crepe of the base paper, and improves the smoothness of the surface of the sanitary thin paper as well as the moisture retention.

The polyol includes polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, and saccharides 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 sanitary thin paper 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 or more of a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc. are optionally selected as agents that maintain the moisture retention of polyol. A moisturizer such as a combination of the above can be added.
In addition, emollients such as fragrances and various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids, etc., that suppress foaming of lotion chemicals and stabilize application as functional agents. Can be blended. Furthermore, you may contain the antioxidant of vitamin C and vitamin E.
Among the above components, when the main component is a polyhydric alcohol such as glycerin or propylene glycol, it is preferable from the viewpoint of application in terms of stabilizing the viscosity and application amount of the lotion chemical.

[Microcapsules applied to sanitary thin paper]
On the other hand, in this invention, a microcapsule is apply | coated to a base paper separately from a lotion chemical | medical solution.
The microcapsules of the present invention are preferably suitable for electrostatic coating by the microcapsule coating apparatus 40 of the sanitary thin paper manufacturing apparatus 10 described later.

Microcapsules contain perfume. As materials for such microcapsules, those mainly composed of urethane, urea-melamine, urea-formalin, agar, and gelatin can be used. However, since the microcapsules are exposed to lotion chemicals, Urethane, urea-melamine, and urea-formalin are more preferable.
In addition, since the microcapsule is scraped off by the doctor blade 44 in the microcapsule coating apparatus 40 of the manufacturing apparatus 10 to be described later, it is desirable to design the microcapsule so as to withstand the scraping. The film thickness of the microcapsule is not particularly limited, but is generally 0.1 to 1.0 μm, preferably 0.1 to 0.5 μm. The average particle size of the perfume-containing microcapsules 32 m is preferably 10 to 50 μm. If it is this range, the fragrance | flavor ratio with respect to a capsule weight can be enlarged, and sufficient fragrance | flavor amount can be contained in a desired fragrance sheet material. However, when the capsule diameter is increased, a large amount of capsules may be destroyed at the time of production and the yield may be lowered. Therefore, a more preferable average particle diameter of the perfume-containing microcapsules is 15 to 30 μm. Here, the average particle diameter depends on the median diameter.

Also, a menthol-based fragrance containing a cooling agent and l-menthol is used as a fragrance included in the microcapsule. This fragrance gives the skin an excellent cooling feeling due to the volatility and cooling agent of menthol when biting the nose.

[Sanitary thin paper manufacturing equipment: overall configuration]
As shown in FIG. 1, the sanitary thin paper manufacturing apparatus 10 includes a base paper supply device 20 that holds a roll of base paper P and feeds the base paper, and a microcapsule application device 40 that applies microcapsules to the base paper P. The liquid application device 30 for applying the lotion chemical solution to the base paper P and the laminating device 60 for stacking the base paper P while being folded are provided.

[Base paper feeder]
The base paper P of sanitary thin paper, as a pre-stage of the production apparatus 10, first, a thin paper is made from pulp fibers (preferably 100% virgin pulp fiber not containing waste paper pulp) in a paper making apparatus, and crepe is applied if necessary. After the calendar treatment, this is wound up to produce a primary raw roll (generally also referred to as a jumbo roll). Then, although not shown, this primary raw roll is set in a known ply machine, The primary continuous sheet fed from the primary raw roll is superposed and wound, and is cut into a plurality of pieces (divided into a plurality of parts in the width direction) to produce a secondary raw roll made of a plurality of plies.

The base paper supply device 20 rotatably holds two secondary raw rolls 21 manufactured by a ply machine, and feeds a secondary continuous sheet from each secondary raw roll as base paper P.
The base paper supply device 20 includes a transport roller 22 that individually transports the base paper P fed from each secondary raw roll 21, and a tension roller 23 provided in the middle of each transport path formed by each transport roller 22. And.
The tension roller 23 is for controlling the tension applied to the base paper P transported by the transport roller 22.

[Microcapsule coating device]
The microcapsule coating apparatus 40 applies microcapsules to the base paper P without mixing it into the lotion chemical solution, and applies two microcapsules to one side of each base paper P transported by two routes. A coating unit 41 is provided.
As shown in FIG. 2, each coating unit 41 has a microcapsule reservoir 42 filled with microcapsules and an upper portion of the outer peripheral surface exposed to the microcapsules arranged and filled below the microcapsule reservoir 42. The spray roller 43, the doctor blade 44 having a uniform film-like microcapsule attached in sliding contact with the outer peripheral surface of the spray roller 43, and the upstream side and the downstream side in the transport direction of the base paper P with respect to the spray roller 43 Two scattering prevention rollers 45 that are in contact with each other, a discharge line 46 that is in sliding contact with the outer periphery of each of the spraying roller 43 and the two scattering prevention rollers 45, and a charger 47 that is disposed below the base paper P being conveyed. Yes.

The lower part of the microcapsule storage part 42 is widely opened, and the spraying roller 43 is arranged so as to close the opening part. As a result, the upper part of the outer peripheral surface of the spraying roller 43 is exposed to the microcapsules filled in the microcapsule storage part 42, and the spraying roller 43 rotates so that the entire circumference of the outer peripheral surface is microscopic. The capsule adheres.
The doctor blade 44 is provided on the upstream side and the downstream side in the conveying direction of the base paper P with respect to the spreading roller 43, respectively, and the microcapsules attached to the outer peripheral surface of the spreading roller 43 that rotates are made to have a uniform thickness. Thin layer.

The two anti-scattering rollers 45 rotate in sliding contact with the spraying roller 43. A microcapsule spraying region surrounded by the spraying roller 43 and the two scattering prevention rollers 45 is formed below the spraying roller 43.
And the base paper P is conveyed in the state which left a little clearance gap with respect to the lower part of the outer periphery of the two scattering prevention rollers 45. At this time, the discharge line 46 slidably contacting the spraying roller 43 and the two scattering prevention rollers 45 in the microcapsule spraying area removes power, so that the microcapsules are outer peripheral surfaces of the spreading roller 43 and the two scattering prevention rollers 45. Is scraped off and falls to the base paper P side.
In addition, since the charger 47 disposed on the lower side of the base paper P is in a charged state, the microcapsules in the microcapsule spraying area are attracted to the base paper P side. Application can be performed.

[Liquid coating device]
The liquid coating apparatus 30 includes a total of four coating units 31 for each base paper P transported in two routes, one for applying lotion chemical on the front side and one for applying lotion chemical on the back side. .
The coating unit 31 has a configuration as a rotor dampening printing type rotor dampening printing device, and is disposed opposite to a sprayer 32 for spraying a lotion chemical solution, in front of the sprayer 32, and a base paper P is placed on the outer peripheral surface thereof. A back roller 33 that is conveyed along the back roller 33 is applied, and a lotion chemical is applied to the base paper P conveyed by the back roller 33 by the sprayer 32.
With these configurations, the lotion solution is applied to both surfaces of each base paper P conveyed by the two routes.

[Lamination equipment]
The laminating apparatus 60 includes two embossing rollers 61 that individually emboss each base paper P conveyed by two routes, and a stacking unit 62 that stacks the base papers P while being folded. Since these are the same as well-known ones, detailed description thereof is omitted.

[Manufacturing method of sanitary thin paper]
FIG. 3 is an explanatory view showing the manufacturing process of sanitary thin paper in order. A method for manufacturing sanitary thin paper using the manufacturing apparatus 10 will be described with reference to FIGS.
First, two secondary web rolls 21 on which a base paper P made of 2-ply thin paper made from pulp fibers is wound are prepared and set in the base paper supply device 20. Then, the base paper P is supplied downstream by two routes. At this time, each base paper P is sent to the microcapsule coating apparatus 40 in a state where a predetermined tension is applied by the tension roller 23 (FIG. 3A: paper supply process).

Next, each base paper P is coated with a microcapsule on one side by an individual coating unit 41 in a microcapsule coating apparatus 40. Since the microcapsule coating apparatus 40 performs electrostatic coating, the microcapsules adhere to the plane of the base paper P by electrostatic force (FIG. 3B: microcapsule coating process). In addition, the code | symbol m in FIG. 3B shows a microcapsule.

Next, each base paper P is applied with a lotion solution on both sides thereof by the respective application units 31 arranged on both sides of the transported base paper P in the liquid application device 30 (FIG. 3C: liquid application step). The applied lotion solution penetrates inside the base paper P. In addition, the code | symbol 1 in FIG. 3C shows a lotion chemical | medical solution.

Next, each base paper P is embossed by each embossing roller 61 in the laminating apparatus 60, and further folded and stacked by the laminating unit 62 (lamination process).
The base paper P folded and laminated in this manner is finally cut at an interval of the same width as the product width in the subsequent equipment, and becomes a product (sanitary thin paper) through processing such as boxing and packaging. .

[Technical effects of the embodiment of the invention]
The sanitary thin paper manufacturing apparatus 10 includes a microcapsule applicator 40 that applies microcapsules to the base paper P in a separate process from the liquid applicator 30, and a liquid applicator 30 that applies a lotion chemical to the base paper P. Therefore, the microcapsule application process and the liquid application process are performed in separate processes.
For this reason, unlike the case where microcapsules are mixed and applied in a lotion chemical solution, adjustment of the functionality of the microcapsules, for example, even when changing the intensity or type of fragrance, only the microcapsules to be applied need to be replaced. Since the chemical solution is not exchanged, it is possible to reduce the work load and the work time, and it is possible to improve the productivity of sanitary thin paper.
In addition, the manufacturing apparatus 10 having the above-described configuration can be realized only by adding the microcapsule coating apparatus 40 to a conventional sanitary thin sheet manufacturing apparatus that applies a lotion chemical solution and does not apply microcapsules. Can be achieved.

The microcapsule coating apparatus 40 of the manufacturing apparatus 10 includes the discharge unit 46 and the charger 47, and the microcapsule is applied to the base paper P by electrostatic coating. It can be performed by coating.
This makes it possible to effectively prevent the microcapsules from becoming dust and diffusing around when applying the microcapsules, while making it unnecessary to mix the microcapsules into the lotion chemical.

Moreover, since the liquid application apparatus 30 of the manufacturing apparatus 10 is a rotor dampening printing apparatus, the lotion chemical can be applied by a rotor dampening printing method in the liquid application process.
This makes it possible to apply with a simple configuration without using a specially shaped roller with grooves and ridges for supplying lotion chemicals to the base paper, such as gravure printing and flexographic printing. Become.

Further, in the manufacturing apparatus 10, a microcapsule to be applied in the microcapsule application step uses a material mainly made of urethane, urea-melamine, or urea-formalin.
If it is a microcapsule which uses these as a main material, even if it exposes to a lotion chemical | medical solution, stability can be maintained and it is possible to hold | maintain a fragrance | flavor until it uses sanitary thin paper. Moreover, it becomes possible to maintain a long service life in which the sanitary thin paper does not lose the function of the fragrance.

[Others]
In addition, the liquid application process by the liquid application apparatus 30 of the manufacturing apparatus 10 is not limited to the rotor dampening method. For example, other liquid application methods such as a flexographic printing method, a roll transfer method, an ink jet method, a spray method, and a gravure printing method may be used.

Further, the microcapsule coating process by the microcapsule coating apparatus 40 is not limited to electrostatic coating. For example, other powder coating methods such as electrostatic spraying and spraying may be applied to the microcapsules.
When a method that does not use electrostatic force is adopted, the microcapsules are not limited to those suitable for electrostatic coating, and microcapsules made of a wider range of materials can be used.

Moreover, although the case where the microcapsule which encloses a fragrance | flavor was utilized was illustrated, the microcapsule which encloses another functional component may be utilized.

(Examples 1 and 2 and Comparative Examples 1 to 3)
Various two-ply tissue papers (Examples 1 and 2 and Comparative Examples 1 to 3) shown in the chart of FIG. 4 were produced, and the lotion solution and the fragrance capsule described in the table were applied, and the operability and sensory evaluation were performed. It was. The lotion chemical solution was applied at 5.6 g / m ² , and the fragrance capsule (microcapsule) having an average particle diameter of 10 μm was applied at 0.60 g / m ² .
In Example 1, a fragrance capsule powder (microcapsule) was applied by an electrostatic device, and then a lotion chemical was applied by a gravure method. In Example 2, a fragrance capsule powder (microcapsule) was applied by an electrostatic device, and then a lotion chemical was applied by a spray method.
In Comparative Example 1, a chemical solution in which a fragrance capsule (microcapsule) was mixed in a lotion chemical solution was subjected to gravure coating. At that time, no electrostatic device is used.
In Comparative Example 2, a lotion chemical was applied by a gravure method, and then a fragrance capsule (microcapsule) was dispersed in water and sprayed. At that time, no electrostatic device is used.
In Comparative Example 3, a lotion chemical solution was applied by a gravure method, and then a perfume capsule (microcapsule) was dispersed in water for gravure coating. At that time, no electrostatic device is used.

(Sensory evaluation of softness)
For sensory evaluation of softness, 10 subjects gave a 10-point score for the softness when touching the surface of the paper with their hands (5 points: very good, 4 points: good, 3 points: none of them, 2 points : Bad, 1 point: very bad), and the average score is calculated. If the average score is 4 points or more, “◎”, if 3 points or more and less than 4 points, “◯”, 3 points Less than “x” was evaluated.

(Sensory evaluation of scent strength)
For sensory evaluation of scent intensity, 10 subjects gave a maximum score of 5 (5 points: very good, 4 points: good, 3 points: either) No, 2 points: bad, 1 point: very bad), and an average score is calculated. If the average score is 4 points or more, “◎”, if it is 3 points or more and less than 4 points, “○ The less than 3 points were evaluated as “x”.

(Chemical solution switching time)
Switching time of the chemical solution, the required lotion chemical from tank 0.8 m ³ withdrawn chemical 0.5 m ^3, when the powder in the system the chemical was placed 0.5 m ³ in the tank after having washed away with water The case where the time was less than 0.5 hours was “◎”, the case where the time was 0.5 hours or more and less than 1.0 hour was “◯”, and the case where the time was 1.0 hours or more was “x”.

(Remaining scent of equipment)
The case where there was no remaining scent was designated as “◎”, and the case where there was a remaining scent was designated as “x”.

As can be seen from Table 1, Example 1 and Example 2 according to the present invention differ from Comparative Examples 1 to 3 in that they exhibit excellent softness and fragrance strength, and there is no residual scent of equipment. Switching time has been shortened.

The present invention can be suitably used in the field of manufacturing thin paper.

DESCRIPTION OF SYMBOLS 10 Production apparatus 20 Base paper supply apparatus 21 Secondary raw roll 22 Conveyance roller 23 Tension roller 30 Liquid application apparatus 31 Application unit 32 Sprayer 33 Back roller 40 Microcapsule application apparatus 41 Application unit 42 Microcapsule storage part 43 Spreading roller 44 Doctor blade 45 Anti-scattering roller 46 Discharge wire 47 Charger 60 Laminating device 61 Embossing roller 62 Laminating section 100 Virgin pulp l Lotion chemical m Microcapsule P Base paper

Claims

A microcapsule applicator for applying microcapsules to a sanitary thin paper base;
A liquid application device for applying a lotion chemical solution to a sanitary thin paper base,
The microcapsule application device applies the microcapsule to the base paper by electrostatic application, and is characterized in that it is a sanitary thin paper manufacturing device.
2. The sanitary thin paper manufacturing apparatus according to claim 1, wherein the liquid applying apparatus is a rotor dampening printing apparatus.
3. The sanitary thin paper manufacturing apparatus according to claim 1 or 2, wherein the microcapsule is mainly made of urethane, urea-melamine, or urea-formalin.
A microcapsule application process for applying microcapsules to a sanitary thin paper base;
A liquid application process for applying a lotion chemical to a sanitary thin paper base,
In the microcapsule application step, the microcapsule is applied to the base paper by electrostatic application.
The method for producing sanitary thin paper according to claim 4, wherein the liquid application step is performed by a rotor dampening printing method.
6. The method for producing sanitary thin paper according to claim 4 or 5, wherein in the microcapsule coating step, the microcapsule is mainly coated with urethane, urea-melamine, or urea-formalin.