JP5931390B2 - Toilet roll manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a toilet roll obtained by winding toilet paper having a crepe to which a chemical solution is applied .

  Toilet paper is generally in the form of a toilet roll in which a continuous strip is wound around a tube core called a paper tube. ing.

  In the above toilet paper, consumers are interested in price, moisture retention (moistness), flexibility (softness), and surface smoothness (smoothness). Seeking high quality toilet paper.

  In addition, it is difficult for patients with hemorrhoids or the like to perform wiping such as rubbing strongly in the wiping work after excretion. For this reason, patients with such hemorrhoids are extremely interested in toilet paper with improved wiping, bulkiness and moisture retention, flexibility, and surface smoothness, and demand for products that excel in their functions.

  In addition, toilet paper is used not only after defecation but also for wiping after urination, especially in women. Since wiping after urination in this woman involves contact with sensitive genital areas, it is moisturizing and soft. There is a potential demand for toilet paper.

  Here, in the toilet paper, chemicals that improve each of these properties were applied in order to enhance moisture retention (moist feeling), flexibility (soft feeling), and surface smoothness (smooth feeling). There is something.

  However, the conventional toilet roll to which the chemical solution is applied is extremely poor in productivity and is expensive, and not all of the characteristics are sufficiently improved, and does not satisfy the demands of consumers. . For this reason, the toilet roll product to which the conventional chemical | medical solution was provided has not reached wide spread.

  Here, the manufacturing method of the toilet roll to which the chemical | medical solution was provided is disclosed by the following patent documents 1-3, for example.

  The technique of Patent Document 1 is a technique of applying a chemical solution by a spray method after applying embossing when manufacturing a log from an original fabric roll set in a winder. In Patent Document 1, since a log is taken immediately after the chemical solution is applied to form a log, the chemical solution is diffused into the paper after the log is manufactured, and there is a drawback that the log is easily unwound by the elongation of the paper due to the crepe elongation. In particular, since the log is cut later to become a toilet roll, if a roll misalignment or mold breakage occurs in the log, it becomes a defective toilet roll and the yield is also deteriorated, which causes the production efficiency to be extremely reduced.

  In addition, since winding is performed with a sheet with unstable paper strength immediately after chemical application, tension control is difficult, paper breakage is likely to occur when the perforation line is applied, the tension on the continuous sheet is lowered, and processing is performed at low speed. And productivity cannot be improved.

  Furthermore, in the technique of Patent Document 1, since the chemical solution is applied by embossing especially after embossing, the embossing is easily deformed. Further, when the chemical solution is applied by the spray method, the discharge amount is limited. Therefore, the amount of the chemical solution applied to the continuous sheet is reduced unless the low-speed processing is performed, and the productivity cannot be increased.

  On the other hand, in the technique of Patent Document 2, when manufacturing a log from an original fabric roll set in a winder, a single emboss is applied by a steel rubber method, and a chemical is applied to an embossed convex portion of the convex embossed roll. This is a technique for transferring and applying a chemical solution to a continuous sheet unwound from a raw roll.

  However, since the technique of Patent Document 2 applies the chemical liquid only to the top of the embossed convex portion and applies the chemical liquid to the continuous sheet, the amount of the chemical liquid applied is small, and a portion where no chemical liquid is applied is generated on the concave embossed surface. There is a risk that the surface smoothness and moisture retention will not be sufficient. Furthermore, since the time of applying the chemical solution with the lowest paper strength and the time of embossing to be held on the continuous sheet with a predetermined pressure are performed at the same time, paper breakage is likely to occur, and it is necessary to process at a low speed, making it difficult to increase productivity.

  Further, since the chemical solution is applied to the embossing roll, the embossing roll may be adhered to the embossing roll with time to cause the embossing roll to become dirty, and the embossing defect due to the adhering paper dust may occur.

  On the other hand, the technology of Patent Document 3 is a technology for obtaining embossed crepe paper as a base paper for toilet paper products. After unrolling continuous sheets from a plurality of raw rolls and superposing them, a chemical solution is applied to the laminated continuous sheets. And then embossing after applying water by spraying to wet paper. And it is the technique of separating each continuous sheet laminated | stacked before winding up again.

  However, in the technique of the cited document 3, since water is applied by spraying before embossing, the chemical solution or embossing is performed before water sufficiently permeates into the continuous sheet, and the chemical solution that does not penetrate the continuous sheet surface is obtained. It tends to adhere to convex embossing rolls and embossing rolls that give embossing. Further, the paper powder and peripheral paper powder adhere to the roll due to the chemical solution or the like adhering to the roll, and the roll is easily contaminated. Such roll contamination with chemicals or paper dust is a cause of paper breakage or a factor of line stoppage due to cleaning, and makes it difficult to increase productivity.

  Furthermore, the technique of the cited document 3 requires equipment other than the winder, the equipment cost is extremely high, and it is difficult to increase productivity in that it takes time to transfer the raw roll between the equipment.

  Here, oily chemicals are known as chemicals for reducing the decrease in paper strength when chemicals are applied, and toilet rolls using such oily chemicals are also known, but such toilet rolls are sufficient to improve the smoothness of the surface. This is because the moisturizing property of the material is insufficient, and among the chemical solutions, an oily chemical solution that does not easily penetrate into the paper layer is used. Moreover, there is a difficulty in terms of water decomposability necessary for this toilet roll.

JP 2009-183411 A JP-A-11-323787 JP 2007-15379 A

  Therefore, the main problems of the present invention are to maintain sufficient water disintegration performance necessary for toilet paper, while maintaining moisture (moisturity), flexibility (softness), and surface smoothness (smoothness). ) Is sufficiently improved, and further, a paper roll is prevented from adhering to a convex embossing roll and a receiving roll for embossing, and a method for producing a toilet roll with high productivity at high speed is provided. Moreover, the manufacturing method of the toilet roll which can improve functions, such as the design improvement and bulkiness by embossing, while improving functions, such as the said productivity improvement and moisture retention, is provided.

Means for solving the above problems and their effects are as follows.
[Invention of Claim 1]
With a winder, unwinding continuous sheets from multiple primary rolls made by papermaking equipment, laminating each continuous sheet along the continuous direction to form a laminated continuous sheet, and then applying chemicals and embossing And the formation of perforation lines in this order, and log formation to be wound around the product diameter of the toilet roll,
After applying a water-based lotion chemical solution to the laminated continuous sheet, continuous protection is provided on both outer surfaces of the laminated continuous sheet to which the chemical solution is applied and the chemical solution is impermeable and has followability to the surface irregularities of the convex emboss roll. The laminated continuous sheet and the continuous protective sheet are passed between the convex embossing roll and the receiving roll in the stacked state, and the laminated continuous sheet is pressed together with the continuous protective sheet with the convex embossing roll to emboss the sheet. A method for producing a toilet roll, characterized in that a continuous protective sheet is applied after the continuous protective sheet is peeled off from the laminated continuous sheet to provide a water-based lotion chemical and emboss.

[Invention of Claim 2]
Embossing is performed by winding and transporting a chemical-coated laminated continuous sheet with continuous protective sheets superimposed on both outer surfaces around a receiving roll, and embossing is given between the convex embossing roll and the receiving roll through the laminated continuous sheet. The method for producing a toilet roll according to claim 1, wherein the laminated continuous sheet is conveyed while being wound around a convex embossing roll, and transferred to a subsequent stage.

[Invention of Claim 3]
From the protective sheet roll wound up with the continuous protective sheet, the continuous protective sheet is sequentially drawn out, superimposed on the laminated continuous sheet to which the chemical solution is applied in the previous stage of embossing, and after the embossing is applied to the laminated continuous sheet, The manufacturing method of the toilet roll of Claim 1 or 2 which peels a continuous protection sheet from a lamination | stacking continuous sheet, and carries out winding collection | recovery.

[Invention of Claim 4 ]
After embossing, the laminated continuous sheet is re-peeled to each continuous sheet, and each continuous sheet is laminated again before forming the perforation line so that the unevenness applied by embossing each continuous sheet does not overlap. The manufacturing method of the toilet roll of any one of Claims 1-3 to do.

[Invention of Claim 5 ]
The manufacturing method of the toilet roll of any one of Claims 1-4 which forms a perforation line in the state which gave ply embossing and was laminated and integrated.

[Invention of Claim 6 ]
The method for producing a toilet roll according to any one of claims 1 to 5 , wherein the chemical solution application is flexographic printing.

  According to the present invention, a primary material roll manufactured by a papermaking facility is directly supplied to a winder without using a separate printing facility or the like to manufacture a log to which a chemical solution is applied. Therefore, it is not necessary to install a chemical application facility separately from the winder, and it is not necessary to move the raw roll to a printing facility or the like, which is excellent in production efficiency and facility installation cost. Here, when the primary raw roll manufactured by the papermaking facility is cut to have a width of 3.5 m or more, the high production efficiency and the facility installation cost according to the present invention are particularly excellent.

  Further, the present invention provides embossing after the chemical solution is applied as a process procedure in the winder, so that the embossing applied to the laminated continuous sheet is not stretched by the chemical solution application, and the embossed sheet is embossed to some extent. Therefore, embossing is firmly applied to the manufactured toilet paper, and a toilet roll having a good appearance can be manufactured.

  Furthermore, in this invention, since there exists an embossing process during perforation line formation after chemical | medical solution provision, time from chemical | medical solution provision to perforation line formation is ensured. In addition, with the laminated continuous sheet after applying the chemical solution being sandwiched between the continuous protective sheets, it is pressed at the time of embossing, so that the chemical solution applied to the continuous sheet is easy to adjust at the time of embossing, and the chemical solution in the continuous sheet is homogeneous. Progress. By these actions, the partial strength difference of the continuous sheet due to the application of the chemical solution is reduced when the perforation line is formed, and the occurrence of sheet breakage when the perforation line is formed is reduced. Therefore, in the present invention, the processing speed (production speed) can be improved.

  In the present invention, when the chemical solution is applied by the roll transfer method, the chemical solution is directly applied to the continuous sheet, and there is no waste of the chemical solution, and a large amount of chemical solution can be applied to the continuous sheet at high speed. .

  On the other hand, in the present invention, when embossing is applied, a continuous protective sheet is superposed on both outer surfaces of the laminated continuous sheet to which the chemical solution is applied, and in that state, the embossing is performed through the laminated continuous sheet between the convex embossing roll and the receiving roll. After that, the continuous protective sheet is peeled from the laminated continuous sheet to obtain a laminated continuous sheet to which a chemical solution and embossing are applied. That is, embossing is provided without contact between an embossing roll such as a convex embossing roll or a receiving roll and a laminated continuous sheet provided with a chemical. Therefore, the chemical | medical solution and paper powder which were apply | coated to the lamination | stacking continuous sheet do not adhere to the said embossing provision roll, and it can operate without contamination of each roll.

  Therefore, there is no occurrence of paper breakage due to adhesion of paper powder and chemicals to each roll, and high speed operation is possible. In addition, since the laminated continuous sheet to which the chemical solution having weak paper strength is applied is protected by the continuous protective sheet and emboss is applied, the laminated continuous sheet is hardly broken at the time of embossing, and high-speed operation is possible. It is also possible to increase the embossing pressure and give a solid embossing.

  In addition, since the continuous protective sheet is located on the surface of the laminated continuous sheet when embossing is applied, the chemical applied at the time of embossing does not diverge easily and penetrates into the paper layer of the laminated continuous sheet, thereby homogenizing the chemical. Promoted.

  As described above, first, according to the present invention, there is provided a chemical liquid application type toilet roll that is differentiated from conventional general-purpose toilet rolls that are not provided with chemical liquids and that is excellent in moist feeling, softness, smoothness, and thickness. High-speed and stable production is possible.

  Here, in the present invention, in particular, from the protective sheet roll around which the continuous protective sheet is wound, the continuous protective sheet is sequentially drawn out and superposed on the laminated continuous sheet to which the chemical solution has been applied in the previous stage of embossing. It is desirable that the continuous protective sheet is peeled off from the laminated continuous sheet after embossing is applied to the sheet, and wound and collected. If it does in this way, it can be set as the lamination | stacking aspect which protects a lamination | stacking continuous sheet easily. Further, only the vicinity of the embossing device in the conveying path may be laminated on the laminated continuous sheet, the continuous protective sheet length can be shortened, and the present invention can be implemented at low cost. Furthermore, the use aspect of using the continuous protection sheet roll wound up and collect | recovered as a roll on the delivery side next time is also attained, and reuse of a continuous protection sheet is made easy.

  If the continuous protective sheet is liquid-impermeable, it is desirable because the chemical liquid applied to the laminated continuous sheet is not absorbed.

  On the other hand, after embossing, the laminated continuous sheet is re-peeled to each continuous sheet, and each continuous sheet is laminated again before forming the perforation line so that the unevenness applied by embossing each continuous sheet does not overlap. If it does so, the exfoliation of an excessive chemical | medical solution will arise by peeling after chemical | medical solution provision, and perforation line formation will be able to be performed favorably. Moreover, since the unevenness | corrugation of each continuous sheet does not overlap, the toilet roll which exhibits a higher-class impression with a feeling of thickness is manufactured.

  Here, in particular, when forming the perforation line, it is preferable to form the perforation line as a state in which ply embossing is applied and stacked and integrated. When the perforation line is formed in a state where the ply embossing is applied and the layers are integrated, the continuous integration of each continuous sheet becomes good, and the perforation line can be reliably applied, and when the product is manufactured. Unintended ply peeling is unlikely to occur. This ply embossing is particularly effective in an embodiment in which the laminated continuous sheet is peeled off after embossing.

  Next, in the present invention, it is desirable that the chemical application is flexographic printing. Flexibility of printing plates, high-speed compatibility, prevention of chemical dispersion, and easy adjustment of coating amount make it possible to achieve high-speed and stable productivity more effectively.

  In addition, when the configuration of the present invention is adopted, a sufficient amount of chemical solution is generated without occurrence of paper breaks and wrinkles even when the conveying speed of the laminated continuous sheet is 500 m / min or more, which is extremely difficult in the production of toilet rolls with conventional chemical solution application. Grant can be made. Therefore, in the present invention, it is desirable to produce at this speed or higher.

It is the schematic which shows the manufacturing method of the primary web roll in papermaking equipment. It is the schematic which shows the example of a manufacturing method of the toilet roll concerning the 1st Embodiment of this invention. It is the schematic which shows a paper tube manufacturing process. It is a figure which shows embossing which concerns on this invention. It is a perspective view for demonstrating a toilet roll. It is a perspective view which shows an example of a toilet roll product. It is a perspective view which shows the other example of a toilet roll product. It is the schematic which shows the example of a manufacturing method of the toilet roll concerning the 2nd Embodiment of this invention. It is the schematic which shows a contact emboss provision process. It is the schematic for demonstrating an example of a chemical | medical solution provision means. It is the schematic which shows an example of a doctor chamber type flexographic printing apparatus. It is the schematic for demonstrating the example of the derivation | leading-out part of a chemical | medical solution supply apparatus. It is the schematic for demonstrating the example of the other derivation | leading-out part of a chemical | medical solution supply apparatus. It is the schematic for demonstrating the example of another derivation | leading-out part of a chemical | medical solution supply apparatus. It is a figure explaining the structure of the doctor chamber used with a chemical | medical solution supply apparatus, Comprising: (A) shows the structure which has two introduction parts and one derivation | leading-out part, (B) is three introduction parts and two derivation | leading-out parts (C) shows a structure in which the same number of introduction portions and derivation portions exist. It is the schematic which shows an example of a 2 roll-type flexographic printing apparatus.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiment.
“First Embodiment”
[Manufacture of primary rolls]
The primary web roll JR (also referred to as jumbo roll) according to the present invention can be manufactured as follows using the papermaking equipment example X1 shown in FIG.

  First, a paper stock prepared by adding an appropriate chemical to the pulp slurry from the head box 31 is supplied onto the wire 32w of the wire part 32 to form the wet paper W (forming process). After being transferred to the felt 33F of the press part 33, it is sandwiched and dehydrated by the paired dewatering rolls 34 and 35 (dewatering step).

  Next, after the dehydrated wet paper W is adhered to the surface of the Yankee dryer 36 and dried, it is scraped off by the doctor blade 37 to obtain a dry base paper S1 (primary continuous sheet described later) having a crepe (drying step).

  Then, the dried base paper S1 is wound by a winding means 38 having a winding drum 39 so that the back surface of the dried base paper S1 is opposed to the shaft side of the primary raw roll JR (so that it becomes the winding inner surface). Take the primary roll roll JR (primary roll take-up step).

  The primary web roll JR differs depending on the performance of the papermaking equipment X1, but generally has a diameter of 1000 to 5000 mm, a length (width) of 1500 to 9200 mm, and a winding length of 5000 to 80000 m. In particular, when the present invention has a length (width) of 3500 mm or more, the operation efficiency is good.

  In addition, a calendar process (not shown) may be provided on the dry base paper S1 that has been scraped off by the doctor blade 37 before the primary web winding process to smooth the front and back surfaces.

  Here, the back surface of the dry base paper S1 means a surface opposite to the surface that is in contact with the cylinder of the Yankee dryer 36. Although depending on the presence or absence of the calendar process, the surface in contact with the mirror Yankee dryer is generally smoother and has better surface properties.

Here, the primary continuous sheet S1 constituting the primary raw roll JR is processed into the toilet paper 1 later, and has a basis weight substantially equal to that of the toilet paper constituting the final product. Therefore, considering this, the primary continuous sheet S1 specifically has a basis weight according to JIS P 8124 of 10 to 25 g / m ² , preferably 12 to 20 g / m ² , more preferably 13 to 18 g / m ² . To do. When the basis weight is less than 10 g / m ² , it is preferable in terms of the softness of the toilet paper, but it becomes difficult to secure an appropriate strength at the time of use, and winding (log production) in a winder at the subsequent stage is difficult. It becomes difficult. On the other hand, when the basis weight exceeds 25 g / m ² , the toilet paper becomes too hard and the touch is deteriorated.

  The paper thickness (measured with a dial thickness gauge manufactured by Ozaki Seisakusho) is 80 to 250 μm, preferably 100 to 200 μm, more preferably 130 to 180 μm.

  The primary continuous sheet S1 has a crepe rate of 10 to 30%, preferably 15 to 28%, more preferably 20 to 25%. When the crepe rate is less than 10%, it becomes easy to break the paper during subsequent processing, and the toilet paper does not stretch and has little elasticity. On the other hand, if the crepe rate is more than 30%, it is difficult to control the tension of the sheet during processing, and it is easy to break the paper.

Here, the crepe rate is expressed by the following equation.
Crepe rate: {(peripheral speed of the dryer during papermaking) − (reel peripheral speed of the reel device in the winding means)} / (peripheral speed of the dryer during papermaking) × 100

  Further, the primary continuous sheet S1 has a dry tensile strength (hereinafter also referred to as dry paper strength) defined in JIS P 8113 having a longitudinal direction of 2 to 300 to 900 cN / 25 mm, preferably 350 to 800 cN / 25 mm. Preferably, it is 400 to 700 cN / 25 mm. On the other hand, the lateral direction is 100 to 400 cN / 25 mm with 2 plies, preferably 130 to 350 cN / 25 mm, particularly preferably 150 to 300 cN / 25 mm. If the dry tensile strength of the primary continuous sheet S1 that is the base paper is too low, troubles such as paper breakage and elongation at the time of manufacture and use are likely to occur, and if it is too high, the touch becomes stiff during use.

  These paper strengths can be adjusted by a known method. For example, NBKP of raw material pulp that reduces the freeness (for example, about 30 to 40 ml) of paper stock by adding a dry paper strength enhancer to the stock or wet paper. Known techniques such as increasing the blending ratio (for example, 50% or more) can be appropriately combined.

  As the dry paper strength enhancer, starch, polyacrylamide, CMC (carboxymethyl cellulose) or a salt thereof such as sodium carboxymethyl cellulose, carboxymethyl cellulose calcium, carboxymethyl cellulose zinc and the like can be used. As the wet paper strength agent, polyamide polyamine epichlorohydrin resin, urea resin, acid colloid / melamine resin, thermally crosslinkable coating PAM, and the like can be used.

  When the dry paper strength enhancer is internally added, the addition amount can be set to about 0.5 to 1.0 kg / t by weight ratio to the pulp slurry.

  Since the wet paper strength enhancer requires water disintegration, it is desirable that the wet paper strength enhancer is not added or is added in a small amount even if it is added. However, when added, it acts advantageously during log production in the latter winder. Therefore, considering this point, a small amount, specifically, 5 kg / t or less in weight ratio to the pulp slurry may be used. it can.

  Here, the paper material used as the raw material of the primary raw material roll (primary raw material sheet) will be described. The paper material is obtained by adding an appropriate chemical to a slurry (pulp slurry) containing pulp as a main raw material as a fiber raw material. .

  In the present invention, the raw material pulp is not particularly limited, and an appropriate raw material pulp used for toilet paper can be selected and used.

  Preferably, the raw material pulp is a blend of NBKP and LBKP. In addition, waste paper pulp may be blended, but it is compatible with the lotion chemical solution according to the present invention, log production in a winder can be suitably performed, and the texture of the resulting tissue paper is desirable, so virgin pulp It is preferable to be composed only of NBKP and LBKP. In this case, the blending ratio (JIS P 8120) is preferably NBKP: LBKP = 20: 80 to 80:20, and particularly preferably NBKP: LBKP = 30: 70 to 60:40.

  Examples of chemicals added to the paper stock include the above-mentioned dry paper strength enhancer, wet paper strength enhancer, release agent, adhesive, pH adjuster such as caustic soda, sticky agent, antifoaming agent, preservative, slime control agent In addition, these chemicals may be applied to the wet paper in an appropriate process.

[Log production]
After manufacturing the primary web roll JR with the papermaking equipment as described above, this is transferred to the winder X2 to manufacture the log 10R. FIG. 2 shows a process (A) for manufacturing a long paper tube 11L used for log manufacturing, a log manufacturing process (B), and a cutting process (C). The part shown in (B) is the log manufacturing process in the winder X2. Here, the manufacturing process (A) of the long paper tube 11L will also be described.

  As shown in FIG. 3, in the process of manufacturing the long paper tube 11L (FIG. 2A), the two strip-shaped paper tube base papers (paperboard) 12 and 12 are removed from the raw rolls 12A and 12A. While each is being fed out, glue is applied to a predetermined position by a gluing roll 13, and the glued portion is overlapped and wound around a shaft 15 by a core winder 14 in a spiral manner, and a predetermined width is set in accordance with the width of the winder or primary roll roll JR. A long cylindrical paper tube 11 </ b> L is formed by cutting and aligning the length with the slitter 16. Each of the paper tube base papers 12 and 12 may use different original fabrics. For example, printing may be performed on one side, or the US basis weight may be changed. Also in the present invention, the paper tube base papers 12 and 12 are not necessarily the same. The diameter of the paper tube is preferably 35 to 50 mm.

  In the present invention, the log 10R is manufactured by the winder X2 in parallel with or after the manufacture of the long paper tube 11L. The log 10R is a general term in the industry, and is an intermediate product having the same diameter as the toilet roll and having a width corresponding to a plurality of toilet rolls.

  The winder X2 includes a raw roll support part, a chemical solution applying unit 53, an emboss applying unit 60, a perforation line applying unit 70 having a perforation roll 71, and a rewinding unit 75 in this order. In manufacturing the log 10R in the first embodiment, continuous sheets S11 and S12 are continuously wound from a plurality of primary rolls JR and JR (two sets in the illustrated example) on the roll roll support portion of the winder X2. The laminated continuous sheet S2 is laminated by stacking at the overlapping portion (laminating means) 51, and then the chemical solution is applied to the laminated continuous sheet S2, embossed, and perforated lines are formed in this order. A continuous sheet S4 in a laminated state is wound around the product diameter of the toilet roll 10 on a long paper tube 11L to obtain a log 10R.

(Lamination of continuous sheets)
The overlapping portion 51 is composed of a pair of nip rolls, and each of the primary continuous sheets S11 and S12 is laminated and nipped to make the primary continuous sheets S11 and S12 laminated and integrated. In the illustrated example, the surfaces of the primary continuous sheets S11 and S12 fed out from the primary raw rolls JR and JR are respectively the surfaces of the laminated continuous sheets S2 (here, the “surface” of the laminated continuous sheets is the laminated outer surface). (The front and back surfaces of the laminated continuous sheet S2). You may comprise so that the back surface of primary continuous sheet S11, S12 may become the surface of lamination | stacking continuous sheet S2, respectively, either one back surface of primary continuous sheet S11, S12 may become the surface of lamination | stacking continuous sheet S2, and the other surface May be the surface of the laminated continuous sheet S2, but the surface of the primary raw sheet S11, S12 is in contact with the surface of the Yankee dryer during drying, so there is less fuzz compared to the back surface, and it is smooth and soft to the touch Therefore, it is desirable that the surface of the primary continuous sheet (dry base paper S1) forms the front and back surfaces of the laminated continuous sheet S2.

  In the illustrated example, two primary web rolls JR are set and a so-called two-ply laminated continuous sheet is wound, but three sets, four sets of three-ply and four-ply laminated continuous sheets are wound. It is also possible to make it.

(Chemical application)
In this invention, a chemical | medical solution is continuously provided with respect to lamination | stacking continuous sheet S2 by the chemical | medical solution provision means 53 of the back | latter stage of the overlap part 51 of the winder X2. In the example of illustration, the aspect which provides a chemical | medical solution to both the outer surfaces of lamination | stacking continuous sheet S2 is shown.

  Here, in the present invention, in order to apply the chemical solution, it is extremely desirable to use a roll transfer type coating means. Examples of the roll transfer type chemical applying unit 53 include printing machines such as gravure printing and flexographic printing. Among them, there are advantages such as flexibility of the printing plate, prevention of chemical solution scattering, and easy adjustment of the coating amount, and flexographic printing capable of applying a sufficient amount of chemical solution at high speed is particularly suitable. In the present invention, non-contact coating such as spray coating and ink jet printing is also possible, but these non-contact coating is difficult to uniformly apply a chemical solution and adjust the coating amount, It is extremely difficult to achieve the high speed that is the subject of the present invention.

  The chemical solution applying means 53 may be composed of one or a plurality of printing machines. When a plurality of printing presses are installed, they may be arranged side by side in the horizontal direction, the up-down direction, or the diagonal direction, and these installation directions including the horizontal direction may be combined. Since the holding angle can be reduced by arranging them in the horizontal direction, the processing speed can be increased, and when they are arranged in the vertical direction, the installation space in the horizontal direction can be reduced.

Here, in this invention, as for the application amount of a chemical | medical solution, it is desirable that the total chemical | medical solution coating amount of both outer surfaces (each surface used as the outer surface of toilet paper) is 0.3-5.0 g / m < ² >. More preferably, it is 1.0-3.9 g / m < ² >, More preferably, it is 2.0-3.0 g / m < ² >. If it exceeds 5.0 g / m ² , there is an increased risk of paper breakage due to a decrease in paper strength or elongation regardless of whether embossing is applied or not, and there may be a case where the feeling of stickiness is too high. On the other hand, if it is less than 0.3 g / m ² , the quality difference from the uncoated product such as smoothness and moistness cannot be felt. More preferably, when it is set to 2.0 to 3.0 g / m ² , the sensory evaluation such as thickness feeling and moist feeling becomes extremely excellent.

  In addition, in this invention, you may make it make the chemical | medical solution provision amount of the chemical | medical solution provision to the part used as the both outer surfaces of toilet paper differ. Moreover, you may make it provide a chemical | medical solution only to the single side | surface of each surface used as the outer surface of toilet paper.

  On the other hand, about the chemical | medical solution, it is desirable that the viscosity is 1-700 mPa * s at 40 degreeC. More preferably, it is 50-400 mPa * s (40 degreeC). If it is less than 1 mPa · s, the chemical solution is likely to scatter, and conversely if it is greater than 700 mPa · s, it becomes difficult to control the amount to be applied stably.

  Here, the chemical | medical solution used for this invention is an aqueous lotion chemical | medical solution, The component contains water and a polyol. In particular, it is desirable to contain 10 to 90% of polyol and 1 to 60% of water, and more desirably 0.01 to 30% of functional chemicals.

  Examples of the polyol 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. Can be mentioned.

  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 functional cost such as smoothness and moisturizing property, and the viscosity and applied amount of the chemical solution.

  Examples of the functional agent include softeners, surfactants, inorganic and organic fine particle powders, and oily components. 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.

  As functional agents, emollients such as various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids and other deodorizing agents that suppress the foaming of chemicals and stabilize their application. It can mix | blend suitably. Furthermore, you may contain the antioxidant of vitamin C and vitamin E.

  The temperature at the time of chemical solution application is preferably 30 ° C to 60 ° C, preferably 35 ° C to 55 ° C.

  Here, there are various types of chemicals used for chemical coating type products, but water-based chemicals containing water and polyols according to the present invention, oil systems mainly containing water-insoluble wax, etc. and semi-solid at room temperature Broadly divided into chemicals. Aqueous chemicals are characterized by excellent handling and low cost and almost no degradation in water disintegration.

  In addition, aqueous chemicals have excellent affinity with the pulp fibers that make up the sheet when applied to the sheet, impregnate in the thickness direction of the sheet (also called the Z direction), and modify the entire sheet and its surface properties. Acts like On the other hand, the oil-based chemical solution mainly acts to coat the surface thereof, acts to improve the smoothness of the surface, and deteriorates water decomposability. On the other hand, since the aqueous chemical solution impregnates the sheet, the action of stretching the crepe applied to the sheet after coating is large and accompanied by a decrease in paper strength. However, the action of the oil-based chemical liquid is small.

  The present invention can produce a sufficient amount of such a water-based chemical solution stably and at high speed, and is moisturizing (moist), soft (soft), and smooth on the surface (smooth). ) And productivity.

(Embossing)
After applying the chemical solution to the laminated continuous sheet S2 (S11, S12) as described above, the embossing means 60 embosses the laminated continuous sheet S2 (S11, S12) with the embossing means. The embossing here is different from the above contact embossing mainly for preventing delamination, and means embossing given to the entire paper surface for the purpose of improving bulkiness, designability, and surface property, These are called micro embossing, macro embossing, design embossing, and the like.

  In the present invention, in the process of transporting the laminated continuous sheet S3, to which the chemical solution is applied, to the subsequent stage while being wound around the convex embossing roll 61 and the receiving roll 62, the laminated continuous sheet S3 is passed between the rolls. Emboss is given to S3. Characteristically, as shown in FIGS. 2 and 4, when embossing is applied to the laminated continuous sheet S <b> 3 to which the chemical solution is applied, the laminated continuous sheet S <b> 3 to which the chemical solution is applied is transferred to the preceding roll (emboss roll 61). Alternatively, before or around the receiving roll 62), continuous protective sheets 65A and 65B wider than the laminated continuous sheet S3 are laminated on both outer surfaces of the laminated continuous sheet S3 to which the chemical solution is applied. In the illustrated form, continuous protective sheet rolls 66A and 66B around which the continuous protective sheets 65A and 65B are wound are arranged above and below the conveying path of the laminated continuous sheet S3, and are continuously protected from these continuous protective sheet rolls 66A and 66B. The sheets 65A and 65B are fed out and laminated so that the continuous protective sheets 65A and 65B are superposed on the laminated continuous sheet S3 from above and below the laminated continuous sheet S3. Then, after the continuous protective sheets 65A and 65B are laminated on both outer surfaces of the laminated continuous sheet S3 as described above, the rolls are laminated between the rolls in the process of being wound around the convex embossing roll 61 and the receiving roll 62 and conveyed to the subsequent stage. The continuous sheet S3 is passed through both the continuous protective sheets 65A and 65B, and embossing is imparted to the laminated continuous sheet S3.

  And after embossing with respect to lamination | stacking continuous sheet S3 through between rolls, continuous protection sheet 65A, 65B is peeled from lamination | stacking continuous sheet S4. In the illustrated embodiment, the continuous protective sheets 65A and 65B are wound and collected by the winding means 67A and 67B after peeling. In addition, the path | route of a continuous protection sheet is not limited to the example of illustration, It is good also as a path | route which interposed the appropriate guide roll and tension roll.

  Here, since the continuous protective sheets 65A and 65B prevent adhesion of the laminated continuous sheet S3 or the surrounding chemical liquid or paper powder to the convex embossing roll 61 and the receiving roll 62, the chemical liquid and paper powder are transmitted therethrough. It is desirable not to do so.

  In addition, it is preferable that the laminated continuous sheet S3 is wider than the laminated continuous sheet S3 so that the entire surface of the laminated continuous sheet S3 is covered.

  Furthermore, since the continuous protective sheets 65A and 65B are pressed by the convex embossing roll 61 together with the laminated continuous sheet S3 when the laminated continuous sheet S3 passes between the rolls, at least against the surface unevenness of the convex embossing roll 61. A sheet having extensibility and flexibility to the extent of following is adopted. It is more desirable to have elastic stretchability. In addition, the specific thickness of a continuous protection sheet is not necessarily limited. What is necessary is just to design in the range which can ensure the nip pressure at the time of embossing, a softness | flexibility, and intensity | strength. However, if the thickness is excessively large, the roll diameter may be too large when the roll mode is adopted as described above.

  Considering these points, as a specific example of the continuous protective sheets 65A and 65B, a liquid-impervious film sheet such as PET, polypropylene, and polyethylene, and a rubber sheet having a thickness of about 50 to 500 μm are desirable. In particular, PET is desirable in terms of strength.

  In addition, the conveyance speed of continuous protection sheet 65A, 65B is adjusted so that it may become the same as the conveyance speed of lamination | stacking continuous sheet S3. For example, as shown in the figure, the winding speed at the time of winding and collecting the continuous protective sheet may be appropriately adjusted.

  Here, the embossing means 60 suitable in the present invention is a metal embossed embossing roll 61 also called a steel rubber system, and the receiving roll 62 is at least an elastic member such as rubber. It is an elastic nip roll 62 comprised by these. The steel rubber embossing means 60 is suitable for high-speed processing.

  Further, when the steel rubber type embossing means is adopted, when the laminated continuous sheet S3 is wound around the convex embossing roll 61 and the elastic nip roll 62, the continuous sheet S3 is first wound while being wound around the elastic nip roll 62 as shown in the figure. It is desirable that the sheet is conveyed and then embossed between the convex embossing roll 61 and then embossed as it is, and then wrapped around the convex embossing roll 61 and conveyed to the subsequent stage.

  In this invention, since it becomes a multilayer structure by which the continuous protective sheet 65A, 65B was further laminated | stacked on lamination | stacking continuous sheet S3, when it wraps around the convex embossing roll 61 with a surface unevenness | corrugation first, in that case lamination | stacking continuous sheet S3 The continuous protective sheets 65A and 65B may be misaligned. However, if the continuous protective sheets 65A and 65B are wound around the elastic nip roll 62 having a smooth surface first, it is possible to feed the rolls between the rolls in a state where the occurrence of such deviation is effectively prevented. it can. Furthermore, the continuous protective sheet is peeled from the continuous sheet S4 after embossing by being wound around and transported by the continuous embossing roll having the corresponding convex part on the laminated continuous sheet S4 on which the unevenness after embossing is formed. Deviation in the interval is effectively prevented.

  Here, it is preferable that the elastic nip roll 62 has a surface hardness of 40 to 60 degrees. If it is out of the above range, the winder X2 may be prevented from being operated at high speed. Further, if it is out of the above range, there is a risk that embossing does not sufficiently enter or the continuous sheet or protective sheet breaks.

  The nip pressure (also referred to as embossing pressure or linear pressure) when embossing is applied to the laminated continuous sheet S3 is 5-30 kgf / cm, preferably 10-25 kgf / cm. If the nip pressure is too low, the effect that the emboss becomes clear may not be sufficiently exhibited. In particular, in the present invention, since the continuous protective sheets 65A and 65B are laminated on the laminated continuous sheet S3, care must be taken so that the nip pressure is not too low. On the other hand, when the emboss pressure is too high, it is difficult to improve the operation speed.

In the present invention, the emboss pattern, the emboss depth, the emboss density, the shape of each unit emboss constituting the emboss, and the embossed area are not particularly limited, but the emboss density is 30 to 100 / cm ² on the entire paper surface. Form of so-called micro embossing applied at a depth of 0.2-2.0 mm, embossing density 0.1-10 pieces / cm ² , embossing depth 0.3-2.5 mm The design embossing can be illustrated. Particularly preferred is the micro-embossing.

  Here, the embossing mode in the first embodiment is a so-called single embossing mode in which embossing is applied to the laminated continuous sheet S3. That is, the embossed convex portion is pressed only from one surface of the laminated continuous sheet S3, and the laminated continuous sheet S4 after embossing is formed with only the embossed concave corresponding to the embossed convex portion on one surface, and the opposite surface. In this embodiment, only the embossed convex portion corresponding to the embossed concave portion is present. The embodiment of the single embossing of this embodiment is excellent in that it operates at a high speed because embossing is imparted to the laminated continuous sheet S3 in a laminated state having a relatively strong paper strength. Moreover, the lamination integration of the primary continuous sheets S11 and S12 constituting the laminated continuous sheet S3 is enhanced.

  For this reason, in the case of the first embodiment, contact embossing can be avoided (in the illustrated example, contact embossing is provided). In this case, the production speed in the winder X2 can be further improved.

(Grant perforation)
As described above, after embossing is given to the laminated continuous sheet S3 by the embossing means 60, the perforation line is given to the laminated continuous sheet S4 by the perforation line giving means 70. The perforation line giving means 70 includes a so-called perforation roll 71 having a blade row in which a large number of blades are disposed along the axial direction on the peripheral surface, and a receiving roll 72 that is paired with this roll. When the laminated continuous sheet S4 is passed between the roll 71 and the receiving roll 72, the saw blade of the perforation roll 71 contacts the laminated continuous sheet S4 to give a perforation line. The saw blades of the perforation roll 71 are formed in a plurality of rows at intervals on the peripheral surface, and perforation lines are formed at predetermined intervals in the flow direction of the laminated continuous sheet S4 by the rotation of the perforation roll 71.

  Here, in the toilet roll according to the present invention, the tensile strength in the longitudinal direction of the laminated continuous sheet S4 at the perforation line is preferably 300 to 700 cN (preferably 400 to 600 cN). Within this range, the risk of accidents that occur at the perforation line at the time of manufacture is remarkably reduced, and when used as a toilet roll, it can be suitably cut reliably at the perforation line. Here, “the tensile strength in the longitudinal direction of the secondary continuous sheet at the perforation line” means the tensile strength during drying measured in accordance with the tensile property test method defined in JIS P 8113, and the sheet itself That is, it means not the tensile strength of the sheet without the perforation line but the tensile strength measured across the perforation line for the sheet with the perforation line (50 mm width).

  The adjustment of the tensile strength in the longitudinal direction at the perforation line is to adjust the tie length which is the connecting part at the perforation line and the cut length which is the same dividing part, as well as the paper strength and basis weight of the continuous sheets S11 and S12. Or by adjusting the tie cut ratio, which is the ratio of the tie length to the cut length.

  More specifically, the tie cut ratio can be adjusted by using a blade row having a desired tie cut length and tie cut ratio. The tensile strength can be adjusted by adjusting the pressing line pressure of the perforation roll to the sheet (pressing force on the sheet per sheet unit width (kgf / cm)) or by adjusting the winder speed (winding speed). Can also be adjusted.

  In addition, as for the suitable structure of the perforation line in this invention, while setting cut length to 0.9-37.5 mm, it is desirable to set a tie-cut ratio (tie: cut) to 1: 15-1: 1. .

(Rewinding laminated continuous sheet)
As described above, the laminated continuous sheet S4 with the perforated line is wound around the long paper tube 11L manufactured in the long paper tube manufacturing process to form a log. The winding of the laminated continuous sheet S4 can be performed by a known method. The winder is generally provided with a winding means, and the present invention also winds the continuous sheet by a known winding means. The winding means 75 of the winder X2 in the illustrated example has a shaft into which the long paper tube 11L is inserted, a drive device for rotating the shaft, and a gluing device. The shaft is inserted into the long paper tube 11L. The paste is appropriately applied to the outer surface of the paper tube in which the shaft is inserted. Thereafter, the leading edge of the laminated continuous sheet S4 is bonded to the long paper tube 11L via the adhesive paste, and then the shaft is rotationally driven to wrap the laminated continuous sheet S4 around the long paper tube 11L.

  Then, a laminated continuous sheet S4 having a predetermined length corresponding to the toilet roll 10 is wound around the long paper tube 11L, and a winding diameter (diameter) corresponding to the toilet roll and a width that is a multiple of the width of the toilet roll 10 or more. After the roll is formed, the rotational driving of the shaft is stopped, and the subsequent laminated continuous sheet S4 is cut to obtain a log 10R.

  Note that a portion (also referred to as a tail) that becomes a free end by being separated from the subsequent laminated sheet is bonded to the outer surface of the winding by an adhesive paste or the like by a known tail sealer mechanism.

  Here, as a paste for adhering the laminated continuous sheet S4 to the outer surface of the long paper tube 11L and adhering the tail to the outer surface of the winding, chloric acid resin, PVA (polyvinyl alcohol), CMC (carboxylmethyl cellulose) Aqueous known glues that do not interfere with the water degradability of toilet paper such as starch and mere water can be suitably used.

  In addition, it is desirable that the log has a winding diameter of 100 to 120 mm and a winding length of 20 to 120 m, so that winding is difficult to occur during winding.

(Other processing)
Here, details of various preferable processes and means that can be performed by the winder X2 in the present invention will be further described below.

  In the present invention, in manufacturing the log 10R in the winder X2, it is desirable that the processing speed is 300 to 900 m / min, preferably 500 to 900 m / min, more preferably 700 to 800 m / min. If it is less than 300 m / min, it cannot be said that the productivity is sufficient. On the other hand, if it exceeds 900 m / min, stable production becomes difficult. In particular, it can be said that the production is sufficiently high at 500 m / min, more preferably 700 m / min. In addition, stability is more excellent when it is set to 800 m / min or less.

  The processing speed of at least 300 m / min or more, usually 500 m / min or more, and preferably 700 m / min or more is an extremely high processing speed in view of the productivity of a conventional chemical-applied toilet roll.

  On the other hand, in the winder X2, although not shown in the drawing, one or more calendar parts can be provided before the chemical application, and the laminated continuous sheet S2 can be calendered. The type of calendar in the calendar part is not particularly limited, but it is preferably a soft calendar or a chilled calendar for the purpose of improving the smoothness of the surface and adjusting the paper thickness. The soft calendar is a calendar using a roll coated with an elastic material such as urethane rubber, and the chilled calendar is a calendar made of a metal roll.

  The number of calendar parts can be changed as appropriate. If there is a plurality of installations, it has the advantage that it can be sufficiently smoothed even if the processing speed is high. On the other hand, one installation has the advantage that it can be installed even if the space is small.

  When two or more calendar parts are installed, they can be arranged side by side in the horizontal direction, the up-down direction, or the oblique direction, and these installation directions can be combined. When arranged side by side in the horizontal direction, the holding angle becomes smaller, so the processing speed can be increased, and when arranged side by side in the vertical direction, the installation space can be reduced. The holding angle referred to here means an angle during which the sheet is in contact with the roll as viewed from the center of the roll axis (a part of an arc of a cross section perpendicular to the axis) (hereinafter the same).

  Paper making is also performed as control factors such as calendar type, nip line pressure, and number of nips in calendar processing, and these control factors are preferably changed as appropriate depending on the quality of toilet paper desired, that is, paper thickness and surface properties.

[Manufacture of toilet rolls]
After manufacturing the log 10R with the winder X2 as described above, the log 10R is continuously or simply transferred to the log accumulator X3. The log accumulator X3 is a known device that transfers a plurality of logs 10R to the subsequent log cutter X4 while moving the logs 10R in the height direction and the horizontal direction.

  The log sequentially transferred from the log accumulator X3 to the log cutter X4 is trimmed at both ends in the width direction as necessary, and is cut into each toilet roll 10 to form individual toilet rolls 10. The log cutter X4 has a rotating round blade 76 arranged at a plurality of intervals so as to contact the circumferential surface of the log 10R, and the log 10R is cut into the width of the toilet roll 10 by the round blade.

  Thus, individual toilet rolls 10 in which the toilet paper S5 is wound around the paper tube 11 are manufactured. As shown in FIG. 5, the manufactured toilet roll is formed by winding a toilet paper S5 from which a laminated continuous sheet S4 has been cut around a paper tube 11 from which a long paper tube 11L has been cut.

  Here, suitable examples of the toilet roll 10 according to the present invention include, as shown in FIG. 5, a width L1 of 100 to 115 mm, a diameter L4 of 100 to 120 mm, and a winding length (total length of toilet paper) of 18 to 70 m. The diameter of the paper tube is 35-50 mm. The perforation line interval L2 is 100 to 300 mm. When the toilet roll 10 having such a configuration is manufactured by applying a chemical solution with the winder X2, a winding dislocation such as a core portion protruding from the paper tube of the log is generated, a log mold is deformed due to the penetration of the chemical solution, and a perforation is formed. There are problems such as sometimes breaking, and it is extremely difficult to manufacture. However, the manufacturing method according to the present invention makes it easy to manufacture.

  In addition, the toilet paper S5 according to the present invention can secure a water disintegration result of at least 80 seconds in the test method for ease of loosening defined by at least JIS P 4501. Usually, if it exceeds 80 seconds, the water disintegration property is slow, and there is a possibility that the drain pipe is clogged when discarded in a flush toilet, for example. In particular, the toilet paper according to the present invention can achieve 35 seconds or less, which is difficult with the conventional chemical application type. That is, this invention can produce the toilet roll which consists of toilet paper which has sufficient water disintegration with high efficiency.

[Storing toilet rolls]
After the toilet roll 10 is manufactured, an appropriate number of them are packaged with an exterior film or the like by a known packaging technique to obtain a toilet roll product S. Examples of the form of the toilet roll product S are shown in FIGS.

  For packaging, the tubular exterior film base is opened, and an appropriate number of toilet rolls 10 are pushed into the inside thereof in a predetermined alignment form, and in that state, the portion of the exterior film base that is not related to the appropriate toilet roll is heat-sealed. In order to prevent the alignment form from moving, the exterior film 20 covers the peripheral surface of the toilet roll in close contact with or close to it so that the alignment state of the internal toilet roll does not collapse. Package with restraint.

  Here, specific examples of the exterior film 20 include HDPE (high density polyethylene) film, LDPE (low density polyethylene) film, polyethylene film such as LLDPE (linear low density polyethylene) film, polystyrene film, polypropylene film, or the like. A laminated film is mentioned. HDPE films, LDPE films, HDPE and LDPE blended films are preferred because they are inexpensive, have appropriate tearability, and can ensure adequate strength. Moreover, the laminated film by which the paper layer and the nonwoven fabric layer were laminated | stacked with respect to these resin films may be sufficient.

As specific packaging modes, known gusset packaging, caramel packaging, shrink packaging, and the like are employed. As shown in FIG. 6, 4 toilet rolls are arranged so that each peripheral surface is in contact with each other, and 4 × 3 = A packaging mode in which twelve toilet rolls are gusset-wrapped and a handle 25 is formed at the upper end, as shown in FIG. 7, two toilet rolls are arranged so that their peripheral surfaces are in contact with each other. An example is a packaging mode in which 2 × 2 = 4 toilet rolls are caramel-wrapped in an alignment mode in which individual sets are attached in two stages so that the end faces are attached.
The toilet roll product according to the first embodiment is manufactured through the above steps.

“Second Embodiment”
Next, a second embodiment of the present invention will be described with particular reference to FIG. In this embodiment, embossing is performed and the continuous protective sheet is peeled from the laminated continuous sheet, and then the laminated continuous sheet is peeled and re-laminated before the perforation is formed. Other configurations are the same as those in the first embodiment, and are as described above.

  In the third embodiment, the laminated continuous sheet S3 is peeled and re-laminated to obtain a laminated continuous sheet having a fluffy thickness with a gap formed between the continuous sheets constituting the laminated continuous sheet S4. It is done.

  In the second embodiment, it is desirable that contact embossing CE is applied after the re-lamination and before the perforation line is applied to enhance the lamination and integration of each continuous sheet. The contact embossing is applied after the continuous protective sheet is peeled off.

  As shown in FIG. 9, the contact embossing means 54 for applying the contact embossing CE includes a receiving roll 154B, which is a metal roll or an elastic roll, and a metal, hard roller 154A having a fine convex portion 154C on the surface. The outer peripheral surfaces are in contact with each other and are installed rotatably. And with respect to the portion corresponding to the center in the width direction of the width L1 of the toilet roll in the laminated continuous sheet S4, the laminated continuous sheet S4 is sandwiched between the convex portion 154C that exists on each of the left and right sides and the receiving roll 154B. By carrying, line-shaped contact embossing CE which prevents delamination along the continuous direction of lamination | stacking continuous sheet S4 is given with respect to lamination | stacking continuous sheet S4.

  In addition, it is desirable to set the laminated continuous sheet S4 as the take-up log 10R in the subsequent re-winding means 75 with the surface on the side facing the roller 154A to which the contact embossing CE is applied as the outer peripheral side.

  By providing the contact embossing CE in this way, delamination of the secondary continuous sheet S4 formed by laminating a plurality of primary continuous sheets (S11, S12) is prevented.

  In this contact embossing process, in this embodiment, the roller 154A is made of a metal and hard roller 154A having fine protrusions 154C on the surface, but the line that prevents delamination from the secondary continuous sheet S4. For example, instead of the roller 154A, a roller having a fine needle-like member on the surface can be used as the roller.

  Furthermore, the means for joining is not limited to the above example, and the tip shape of the convex portion may be a point, square, rectangular, circular, elliptical shape, etc. A tip having a slender linear shape or a thin and slanting linear shape may be used as the roller.

  On the other hand, the arrangement of the protrusions may be equally spaced, but may not be staggered or evenly spaced. In addition to arranging the protrusions in a row and providing contact embossing continuously, It is also conceivable to arrange the parts in two or more rows. Then, a plurality of groups in which convex portions are arranged so as to provide a plurality of rows of contact embossing closely may be arranged to provide a plurality of contact embossing groups. In addition, as a joining process, you may join by other means, such as an ultrasonic wave, besides joining by applying a pressure mechanically as mentioned above.

“Specific examples of chemical application methods”
Next, a specific example of the chemical solution applying means (chemical solution applying step) 53 common to the first to third embodiments will be described in detail below.
[Flexo printing]
The example which employ | adopted the flexographic printing machine as the chemical | medical solution provision means 53 is shown to FIGS. Flexographic printing uses a resin-based elastic printing plate, so even if there are some irregularities of the crepe on the surface of the laminated continuous sheet S2, it can be adjusted with the printing pressure and can be applied evenly, especially 500m / Min. Or more, even if high-speed coating is performed at 700 m / min, wrinkles are unlikely to enter into the laminated continuous sheet S3 after chemical application. In addition, one roll can handle a wide range of chemical viscosities, providing advantages in terms of management and equipment maintenance, and improving productivity.

  Here, when applying a chemical | medical solution to the lamination | stacking continuous sheet S2 at the said high speed, the number of lines of a flexographic printing plate roll shall be 5-60 lines, Preferably it is 10-40 lines, Most preferably, it is 15-35 lines. If the number of wires is less than 5, many coating irregularities occur. On the other hand, if the number of wires exceeds 60, paper dust tends to clog.

  The number of lines of anilox roll is 10 to 300 lines, preferably 25 to 200 lines, particularly preferably 50 to 100 lines. If the number of lines is less than 10, many coating irregularities occur during high-speed coating, and if the number of lines exceeds 300 lines, paper dust tends to clog. The anilox roll has a cell capacity of 10 to 100 cc, preferably 15 to 70 cc, particularly preferably 30 to 60 cc. If the cell capacity is less than 10 cc, a desired coating amount cannot be obtained. On the other hand, if the cell capacity is more than 100 cc, the amount of chemical solution scattered increases.

  Here, in the present invention, it is important that the chemical solution can be stably applied in the chemical solution application step, and the number of lines of the printing plate roll and the aniloc roll related to the operation stability is important. In addition, as a system for transferring the chemical liquid stored in the storage tank to the anilox roll, an appropriate method such as a doctor chamber type or a touch roll type is adopted. Examples of forms employing these flexographic printing methods will be described in further detail below.

(Example embodiment of doctor chamber system)
An embodiment in which a doctor chamber type in a crepe printer is applied to the present invention will be described with reference to FIGS.
In this example, two flexographic printing machines 91A and 91B are used to apply chemicals to the front and back surfaces of the laminated continuous sheet S2.

  In each of the printing machines 91A and 91B, doctor chambers 92A and 92B containing a chemical solution are arranged to face the rotatable anilox rolls 93A and 93B, and the chemical solution is transferred from the doctor chambers 92A and 92B to the anilox rolls 93A and 93B. It is supposed to be handed over. Further, printing plate rolls 94A and 94B that are in contact with the anilox rolls 93A and 93B and are also in contact with one surface of the laminated continuous sheet S2 and the like are rotatably installed, and the chemical solution is transferred from the anilox rolls 93A and 93B to the printing plate rolls 94A and 94B. Is to be handed over. Then, while applying pressure to the laminated continuous sheet S2 with the elastic rolls 95A and 95B facing the printing plate rolls 94A and 94B with the laminated continuous sheet S2 interposed therebetween, the printing plate rolls 95A and 95B are applied to the laminated continuous sheet S2. Apply chemicals.

  Each of the doctor chambers 92A and 92B is connected to a storage tank 98 for storing the chemical liquid L via a supply hose 96 and a return hose 97, and constitutes a part of the chemical liquid circulation path (hereinafter, each printing machine 91A and 91B). For explaining the same structure, one of them may be written in parentheses as in the doctor chamber 91A (91B)). The storage tank 98 can be shared by the doctor chambers 92A and 92B. Although not shown, the temperature of the chemical solution is monitored and controlled in a coating device such as a paper powder or air filtration device, doctor chamber 92A or 92B contained in the chemical solution circulating in the chemical solution circulation path, and the viscosity of the chemical solution is stabilized. Intermediate tanks and piping heaters can be installed.

  The chemical solution is supplied from the storage tank 98 to the doctor chamber 91 </ b> A (91 </ b> B) by the supply pump 99 through the supply hose 96 by pressure supply, and the extrusion amount (flow rate) of the chemical solution is adjusted by opening / closing the adjustment valve 100. The Further, the return of the chemical solution from the doctor chamber 91A (91B) to the storage tank 98 is performed by the suction pump 101 via the return hose 97.

  The doctor chamber 91A (91B) includes a chamber portion 102 and blades 103 and 104 in which a chemical solution is stored. The chamber portion 102 is open at the end on the anilox roll 93A (93B) side, and is connected to a supply hose 96 and a return hose 97 via connecting portions 105 and 106. During the chemical solution circulation, the chemical solution L is stored and supplied to the anilox roll 93A (93B). On the other hand, the blades 103 and 104 are provided so as to come into contact with the anilox roll 93A (93B), and the chemical solution L is squeezed while being pressed against the anilox roll 93A (93B), so that the chemical solution to the anilox roll 93A (93B) is drawn. The supply amount is constant.

  On the other hand, as shown in FIG. 12, a hole 106a, which is an opening portion of a predetermined diameter, is formed on the upper surface of the connection portion 106 between the return hose 97 serving as a return path for the chemical liquid L and the chamber portion 102. Even if the chemical liquid L in the connecting portion comes into contact with the outside air through the hole 106a and the chemical liquid L is sucked by the suction pump 101, the chemical liquid L comes into contact with the outside air so that the internal pressure in the chamber portion 102 can be brought close to the external pressure. It is configured. Thereby, the internal pressure fluctuation in the doctor chamber is suppressed. Note that the hole 106a may be formed so as to communicate with the upper surface of the chamber 102, for example, as long as fluctuations in the internal pressure of the chamber 102 are suppressed. The hole 106 a may be provided on the side surface as long as it is above the liquid level of the chemical solution L in the chamber portion 102.

  The hole 106a is provided with a determining means for determining excessive supply of the chemical solution to the chamber 102. The discriminating means can be, for example, a transparent or translucent tube-like member 106b extending upward with the hole 106a side as a lower end. It can be visually confirmed whether or not it flows into 106b. When inflow into the tube 106b is confirmed, the amount of the chemical solution stored in the chamber portion 102 is excessive (the chemical solution L is in an oversupply state with respect to the anilox roll 91A (91B)). Can be grasped. Therefore, the user who visually confirms the excessive state can eliminate the excessive state by, for example, adjusting the extrusion amount (flow rate) of the chemical liquid L by operating the adjustment valve 100. Since the tube 106b is hollow and the upper end side is in contact with the outside air, the operation of the hole 106a is not canceled out.

  In addition, by providing the upper end (free end) of the tube 106b downward, it is possible to prevent foreign matters such as paper dust from entering the hole 106b. In addition, an air filter may be installed at the upper end or the hole of the tube 106b to prevent foreign matters such as paper dust from entering.

  Note that the oversupply state of the chemical liquid L to the chamber unit 102 may be automatically determined, and the determination result may be notified to the user.

  In this example, as shown in FIG. 13, a sensor 106d is attached to a cylindrical portion 106c in which the peripheral edge of the hole portion 106a is extended upward, and a determination result is notified from the notification portion in response to a signal from the sensor 106d. .

  The sensor 106d includes, for example, a light emitting element (not shown) that emits light toward the detected body and a light receiving element (not shown) that receives the reflected light from the detected body, and reflects the reflected light from the light receiving element. Based on the amount of received light, it is detected whether or not the height of the chemical liquid L flowing into the cylindrical portion 106c has reached the height position (y1 shown in FIG. 13) where the sensor 06d is provided.

  For example, the notification unit 106e is a speaker or the like, and when the sensor 106d detects that the height of the chemical liquid L flowing into the cylindrical unit 106c has reached the height position where the sensor 106d is provided, The user is notified by voice.

  In this example, when an excessive state is reached, the user can know the fact by the notification unit 106e, and by operating the adjustment valve 100 to adjust the extrusion amount (flow rate) of the chemical liquid L, It becomes possible to eliminate the excessive state.

  Furthermore, as shown in FIG. 14, in addition to the automatic discrimination function, the determination of the oversupply state of the chemical solution L to the chamber portion 102 includes the adjustment portion 106f of the needle valve structure having a needle valve and an orifice in the cylindrical portion 106c. It can be configured to adjust the amount of opening of the portion of the hole 106b that comes into contact with the outside air. Thus, by adjusting the substantial opening amount of the hole portion 106b by the adjusting portion 106f, the opening amount of the hole portion 106b can be appropriately adjusted according to the internal pressure fluctuation amount in the chamber portion 102. . Therefore, when the height of the chemical liquid L flowing into the cylindrical portion 106c reaches the detection position by the sensor 103e, not only the adjustment of the extrusion amount of the chemical liquid L is dealt with, but also the hole 106b of the adjusting portion 106f By adjusting the substantial opening amount, it is possible to improve the air venting capability of the hole 106b (expand the contact area with the outside air) and suppress the internal pressure fluctuation in the chamber portion 102. Thereby, the ejection of the chemical liquid L from the chamber portion 102 due to the internal pressure fluctuation and the suction of the chemical liquid L on the anilox roll 93A (93B) to the doctor chamber 92A (92B) side are suitably prevented, and the circulation of the chemical liquid L is prevented. Is promoted.

  On the other hand, in the doctor chamber type flexographic printing machine, the anilox roll 93A (93B) is provided so as to contact the blades 103 and 104 of the doctor chamber 92A (92B), and the opening of the chamber portion 102 of the doctor chamber 92A (92B) is provided. It is configured such that the chemical liquid L to be supplied is adsorbed on the peripheral surface.

  The printing plate roll 94A (94B) has a cylindrical shape whose peripheral surface is made of a resin material such as a rubber material, and the peripheral surfaces (points P1, P2 shown in FIG. 11) of the left and right end portions are anilox rolls 93A (93B) and The elastic rolls 95A (95B) are provided so as to abut on the peripheral surface of the laminated continuous sheet S2 or the like wound around the elastic rolls 95A (95B), and are configured to be rotatable.

  The printing plate roll 94A (94B) rotates in the r2 direction when the elastic roll 95A (95B) rotates in the r1 direction, and rotates the anilox roll 93A (93B) in contact with the right end in the r1 direction. The printing plate roll 94A (94B) acquires the chemical solution L adsorbed on the peripheral surface of the anilox roll 93A (93B) at a point P2, conveys it to the point P1 by turning in the r2 direction, and the laminated continuous sheet S2 or the like. Transcript to. Even if the chemical solution L adsorbed by the anilox roll 93A (93B) remains unevenly in a layered manner on the peripheral surface of the anilox roll 93A (93B), it is transferred to the peripheral surface of the plate roll 94A (94B). The chemical liquid L can be uniformly transferred to the laminated continuous sheet S2.

  The elastic roll 95A (95B) is a columnar member that is provided adjacent to the printing plate roll 94A (94B) and rotates by applying a driving force from a motor (not shown) or the like, and is laminated on the peripheral surface. The continuous sheet S2 is configured to be gripped. Therefore, the elastic roll 95A (95B) is rotated in the r1 direction so as to wind the supplied laminated continuous sheet S2 and the like around the peripheral surface and rotate the printing plate roll 94A (94B) and the anilox roll 93A (93B). The liquid L can be transferred from the printing plate roll 94A (94B) at the point of time when it is moved to the point P1 position.

  Although the direction of rotation of the elastic roll 95A (95B) is the r1 direction in FIG. 11, it may of course be configured to rotate in the r2 direction. In this case, the anilox roll 93A (93B) and the printing plate roll 94A (94B) are rotated in directions opposite to those in FIG. 11 (that is, the anilox roll 93A (93B): r2 direction, the printing plate roll 94A (94B): r1 direction). Move.

  Here, in the example shown in FIG. 11, only one supply hose 96 and one return hose 97 are connected to the chamber portion 102, but it is preferable to make the chemical solution L in the width direction in the chamber portion 102 uniform. The structure shown to 15 (A)-(C) can be illustrated. FIG. 15A shows a width direction D of a doctor chamber 92A (92B) in which an outer frame is formed in a wide rectangular shape along an anilox roll 93A (93B) which is formed wide and rotates around a rotation axis R0. This is an example of a structure in which a supply hose 96 is connected to a portion near the left and right ends of each, and a return hose 97 is connected to the center. FIG. 15B is a structural example in which three supply hoses 96 and two return hoses 97 are alternately connected at equal intervals in the width direction D. FIG. 15C is a structural example in which the supply hose 96 is connected to a plurality of locations near the upper side of the chamber portion 102 and the return hose 97 is connected to a plurality of locations near the lower side.

(Embodiment example of 2-roll transfer system)
Next, an example of an embodiment to which a two-roll transfer format in the bullet printing is applied will be described with reference to FIG. Also in this embodiment, two flexographic printing machines 91C and 91D are used to apply the chemical liquid L to the front and back surfaces of the laminated continuous sheet S2. In each of the printing machines 91C and 91D, dip rolls 92C and 92D, which are rotatable squeezing rolls, are immersed in the chemical liquid tanks 98C and 98D containing the chemical liquid L, and the dip rolls 92C and 92D are outside the chemical liquid tanks 98C and 98D. Are in contact with the rotatable anilox rolls 93C and 93D, and the amount of the chemical solution is appropriately adjusted, and the amount of the chemical solution is delivered to the anilox rolls 93C and 93D. Since the chemical solution L is transferred to the anilox rolls 93C and 93D through the dip rolls 92C and 92D, it is called a two-roll transfer system. Here, the dip rolls 92C and 92D serve to take up the chemical liquid L from the chemical liquid tanks 98C and 98D and adjust the excessive chemical liquid so as not to be transferred to the anilox rolls 93C and 93D.

  The anilox rolls 93C and 93D are in contact with the printing plate rolls 94C and 94D, and deliver the chemical liquid L transferred from the dip rolls 92C and 92D to the printing plate rolls 94C and 94D. The plate rolls 94C and 94D are rotatably installed, are in contact with the anilox rolls 93C and 93D, and are also in contact with one surface of the laminated continuous sheet S2, etc., and the elastic rolls 95C, The liquid L is applied to the laminated continuous sheet S2 and the like while applying pressure to the laminated continuous sheet S2 and the like at 95D.

  In this two-roll transfer method, a doctor blade may be provided for the anilox rolls 93C and 93D. In this case, the chemical solution L can be applied uniformly, and the chemical solution L is scattered from the anilox rolls 93C and 93D. However, on the other hand, high-speed coating has the disadvantage of increasing the frequency of care and replacement of the doctor blade.

  Although not shown in the chemical liquid tanks 98C and 98D, a paper powder and air filtering device included in the chemical liquid, a piping heater for monitoring and controlling the temperature of the chemical liquid, and stabilizing the chemical liquid viscosity, a laminated continuous sheet A sensor or the like for monitoring the moisture content and variation in the paper width direction using an infrared inspection machine or the like for managing the coating amount with the moisture content in the width direction such as S2 can be installed.

(Embodiment of 1 roll transfer type)
Next, a description will be given of an example of a case in which the one-roll transfer format in the bullet printing is applied to the present invention. In this example, the dip roll is omitted from the above-described two-roll transfer format (the drawing is omitted). In this case, each anilox roll is rotatably installed while being immersed in the chemical solution tank. For these anilox rolls, a doctor blade for scraping off the chemical solution on the anilox roll surface is installed. Such a flexo 1-roll transfer format has the advantage that the maintenance is relatively easy, and the advantage that the state of contamination of the blades and foreign matters such as paper dust in the chemical solution can be easily observed.

  X1 ... papermaking equipment, JR ... primary web roll (jumbo roll), W ... wet paper, S1 ... dry base paper (primary continuous sheet), 31 ... head box, 32 ... wire part, 32w ... wire, 333 ... press part, 33F ... felt, 34,35 ... dehydration roll, 36 ... yankee dryer, 37 ... doctor blade, 38 ... winding means, 39 ... winding drum, X2 winder, 10R ... log, 11L ... long paper tube, 12 ... paper Tube base paper, 12A ... Paper tube roll, 13 ... Glue roll, 14 ... Core winder, 15 ... Core shaft, 16 ... Slitter means, 53 ... Chemical liquid application means (chemical liquid application process), 60 ... Emboss application means, 70 ... Perforation line giving means, 71 ... perforation roll, 72 ... receiving roll, S11, S12 ... primary continuous sheet, 5 ... superposition part (lamination means), S2 ... lamination continuous sheet, S3 ... (lamination) continuous sheet after chemical application, 61 ... embossing roll, 62 ... receiving roll, S4 ... (lamination) continuous sheet after embossing, 75 ... take-up means, 76 ... round blade, L1 ... toilet roll width, X4 ... log accumulator, X5 ... log cutter, 10 ... toilet roll, 11 ... paper tube, S ... toilet roll product, 20 ... exterior film, 10 ... Toilet roll, S5 ... toilet paper, 20 ... exterior (wrapping) film, 25 ... handle, 58 ... re-overlapping part (lamination means), 54 ... contact embossing means (contact embossing process), 65A, 65B ... continuous protection Sheet, 66A, 66B, continuous protective sheet roll, 67A, 67B, winding means.

Claims (6)

With a winder, unwinding continuous sheets from multiple primary rolls made by papermaking equipment, laminating each continuous sheet along the continuous direction to form a laminated continuous sheet, and then applying chemicals and embossing And the formation of perforation lines in this order, and log formation to be wound around the product diameter of the toilet roll,
After applying a water-based lotion chemical solution to the laminated continuous sheet, continuous protection is provided on both outer surfaces of the laminated continuous sheet to which the chemical solution is applied and the chemical solution is impermeable and has followability to the surface irregularities of the convex emboss roll. The laminated continuous sheet and the continuous protective sheet are passed between the convex embossing roll and the receiving roll in the stacked state, and the laminated continuous sheet is pressed together with the continuous protective sheet with the convex embossing roll to emboss the sheet. A method for producing a toilet roll, characterized in that a continuous protective sheet is applied after the continuous protective sheet is peeled off from the laminated continuous sheet to provide a water-based lotion chemical and emboss.   Embossing is performed by winding and transporting a chemical-coated laminated continuous sheet with continuous protective sheets superimposed on both outer surfaces around a receiving roll, and embossing is given between the convex embossing roll and the receiving roll through the laminated continuous sheet. The method for producing a toilet roll according to claim 1, wherein the laminated continuous sheet is conveyed while being wound around a convex embossing roll, and transferred to a subsequent stage.   From the protective sheet roll wound up with the continuous protective sheet, the continuous protective sheet is sequentially drawn out, superimposed on the laminated continuous sheet to which the chemical solution is applied in the previous stage of embossing, and after the embossing is applied to the laminated continuous sheet, The manufacturing method of the toilet roll of Claim 1 or 2 which peels a continuous protection sheet from a lamination | stacking continuous sheet, and carries out winding collection | recovery. After embossing, the laminated continuous sheet is re-peeled to each continuous sheet, and each continuous sheet is laminated again before forming the perforation line so that the unevenness applied by embossing each continuous sheet does not overlap. The manufacturing method of the toilet roll of any one of Claims 1-3 to do. The manufacturing method of the toilet roll of any one of Claims 1-4 which forms a perforation line in the state which gave ply embossing and was laminated and integrated. The method for producing a toilet roll according to any one of claims 1 to 5 , wherein the chemical solution application is flexographic printing.

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