JP6674678B2 - Method of manufacturing toilet roll and toilet roll - Google Patents

Description

  The present invention relates to a toilet roll in which a plurality of plies of band-shaped toilet paper are wound around a tube core and a method for manufacturing the same.

  In a toilet roll wound with a belt-shaped toilet paper, at an appropriate interval in a continuous direction (MD direction), in a width direction (CD direction) perpendicular to the continuous direction, so that the toilet paper can be easily cut during use. Some have perforations along it.

  On the other hand, there is a toilet roll in which plural plies of toilet paper in which a plurality of continuous belt-shaped sheets are stacked are wound. This multi-ply toilet paper has narrow contact embosses (also referred to as edge embosses, etc.) along the continuous direction on both sides in the width direction of the toilet paper so that the sheets do not peel off from each other during use. Or embossing (referred to as main embossing, macro embossing, etc.) for improving the design is applied to the entire surface of the paper, and an adhesive paste is applied to the top of the embossing to bond the sheets together. . This embossed form in which the base paper is adhered by applying an adhesive to the top of the emboss is also called a laminate emboss.

  However, in the conventional means for preventing ply peeling, in the former method of forming a narrow contact emboss, paper sheets are generated at the time of embossing because a sheet is strongly press-bonded, and perforation is likely to occur. There are operational problems such as difficulty in speeding up. Also, the toilet paper ply-joined by this edge embossing has a reduced design due to prominent edge embossing, and when used as a toilet roll, a portion of the peripheral surface is ribbed due to the overlap of the edge embossed portions. There is also a problem that the appearance of the roll rises and the appearance of the roll deteriorates. On the other hand, the toilet paper ply-joined by the latter laminate embossing has a problem that a feeling of hardness and a feeling of roughness are likely to be generated because the adhesive paste-applied portion is scattered all over the paper surface.

JP-A-2002-17607 JP 2014-54389 A JP 2010-6539 A Patent No. 4332330 Patent No. 5479973

  Therefore, the main problem of the present invention is that there are no problems such as operation problems of the contact embossing at the time of manufacturing and appearance problems such as when a toilet roll is used, and problems such as hardening of toilet paper having the laminate embossing do not occur. It is an object of the present invention to provide a toilet roll which has excellent ply peeling prevention property, has excellent separability at a perforation, and has a good appearance, and a method for manufacturing the same.

  The present invention which has solved the above problems and the effects thereof are as follows.

[Invention of claim 1]
A feeding step of feeding a primary continuous sheet from each of a plurality of raw rolls,
The adhesive glue is intermittently spray-applied to the conveyed primary continuous sheet by a rotor damping type coating apparatus having a plurality of rotor dampening units, at predetermined intervals in the conveying direction of the primary continuous sheet, and orthogonal to the conveying direction. Forming an adhesive glue application portion of a predetermined width in a non-contact manner along the direction in which the adhesive glue is applied,
A laminating step of laminating the primary continuous sheets so that the surface to which the adhesive is applied becomes the inner surface of the laminate to form a laminated continuous sheet,
A perforation blade intermittently applied to the conveyed laminated continuous sheet, at a predetermined interval in the conveying direction of the laminated continuous sheet, a perforation forming step of forming a perforation extending in a direction orthogonal to the conveying direction,
A winding step of winding the laminated continuous sheet on which the perforations are formed, and
In the adhesive glue applying step, the adhesive is sprayed from a plurality of rotor dampening units whose spray ports are directed along a direction orthogonal to the transport direction of the primary continuous sheet, and the shutter of each unit provided in the spray direction is sprayed. period by individually controlling the opening and closing, and to intermittently spray application of adhesive paste in the transport direction with respect to the primary continuous sheet, and directing said perforation blade and period of opening and closing of the shutter in the laminated continuous sheet of To make the perforation forming position fall within the range of the adhesive glue application portion, and the leading and trailing sides with respect to the transport direction from the perforation forming position and this position. A method for manufacturing a toilet roll, wherein a range including the range is a laminated continuous sheet that is ply-joined with an adhesive.

[Invention of claim 2]
A toilet roll in which toilet paper in which a plurality of plies of band-shaped sheets are laminated is wound around a tube core,
The toilet paper is formed by non-contact coating so as to extend at a predetermined interval in a continuous direction and at a predetermined width in a direction orthogonal to the continuous direction, through an adhesive glue applying portion which is not reduced in thickness by contact coating. The band-shaped sheet is ply-joined,
The adhesive glue application portion is formed by applying adhesive glue in a broken line along a direction perpendicular to the transport direction, and the adhesive glue application portion has a perforation extending in a direction orthogonal to the continuous direction. A toilet roll, which is formed.

  As described above, according to the present invention, there is no problem in operation such as contact embossing during manufacturing or in appearance when a toilet roll is used, and no problem such as hardening of toilet paper having laminate embossing. The present invention provides a toilet roll having excellent ply peeling prevention property, excellent detachability at a perforation, and good appearance, and a method for producing the same.

It is a figure showing an outline of a manufacturing process of a toilet roll concerning an embodiment of the present invention. It is a figure for explaining the relation between the application form of the adhesive glue concerning the embodiment of the present invention, and the form of perforation line formation. It is a figure for explaining an adhesive paste application device concerning an embodiment of the present invention. It is another figure for explaining the adhesive paste application device concerning an embodiment of the present invention. It is a figure for explaining a toilet roll concerning an embodiment of the present invention.

  An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram illustrating an outline of a method of manufacturing the toilet roll 10 according to the present embodiment. As shown in FIG. 1, in the method for manufacturing the toilet roll 10 of the present embodiment, a long paper tube 30 having a width that is a multiple of the width of the toilet roll to be a product in the step (A) is manufactured by a known method. In the step (B), the laminated continuous sheet 72 is wound around the long paper tube 30 manufactured in the step (A), and has the same diameter as the final product of the toilet roll 10 and the final width. A log 70 of an intermediate product which is equal to or more than a plurality of products is manufactured, and in the step (C), the log 70 is cut in the width direction to obtain individual toilet rolls 10.

  In the present embodiment, in the step (B), the laminated continuous sheet 72 is manufactured as follows, and is wound around the long paper tube 30. That is, a rotational force is applied to the plurality of raw rolls 1 and 1 (two in the figure), and the primary continuous sheets 71 and 71 are fed from the raw rolls 1 and 1 (a feeding step). The primary continuous sheets 71, 71 are desirably a single layer, but may be a plurality of layers. In this case, a raw roll manufactured by previously stacking and winding a plurality of base papers with another laminating apparatus or the like may be used.

  Next, each of the primary continuous sheets 71, 71 fed out is passed between a convex embossing roll 61 having a large number of convex portions arranged in a predetermined pattern on a peripheral surface thereof and a receiving roll 62. Is embossed (embossing step). The embossing here is different from the embossing (edge embossing or the like) for ply bonding for laminating and integrating the primary continuous sheets as separately given to the respective primary continuous sheets 71, 71. . The embossing applied here is fine embossing, which is called micro embossing, or embossing, which is called macro embossing, or embossing, which is called design embossing, which is arranged with design on the entire paper surface. By the embossing, the bulkiness (softness), softness, and smoothness of the obtained primary continuous sheet 71, and the resulting continuous continuous sheet 72 and toilet paper are improved. In this embossing step, no adhesive is applied to the primary continuous sheets 71, 71, and so-called laminate embossing is not performed. In the present invention, this embossing step is not essential, but it is desirable to apply the embossing step because the texture of the laminated continuous sheet obtained as described above is improved.

  Next, the adhesive paste is applied to the embossed primary continuous sheet 71 by a spray coating device 80 in which spray ports 81 are arranged in a direction orthogonal to the transport direction of the primary continuous sheet 71, and the adhesive adhesive applied portion 7 is formed. It is formed (adhesive paste application step). It is not necessary to apply the adhesive to both the primary continuous sheets 71, 71, and the adhesive may be applied to one of the primary continuous sheets 71 as in the illustrated example. The adhesive is applied by spraying the adhesive continuously onto the conveyed primary continuous sheet 71 at a predetermined interval in the transport direction of the primary continuous sheet 71 and a predetermined width in a direction orthogonal to the transport direction. The adhesive glued portion 7 of L1 is formed. In the case where the adhesive is spray-applied as described above, the adhesive is applied to the primary continuous sheet 71 in a non-contact manner. There are advantages that it is difficult to reduce the thickness of 71 and that wrinkles during application are hard to be formed. In particular, in this adhesive paste applying step, the adhesive paste is sprayed in a direction toward the primary continuous sheet 71 conveyed from the spray port 81, and a shutter 82 is provided in the spray direction, and the primary continuous sheet 71 is opened and closed by opening and closing the shutter 82. The adhesive is intermittently spray-applied. That is, by arranging the spray ports 81 in a direction perpendicular to the conveying direction of the primary continuous sheet 71, the adhesive is applied in a direction perpendicular to the width direction of the primary continuous sheet 71. The application and non-application of the adhesive to the primary continuous sheet 71 conveyed by opening and closing are selected, and the adhesive is applied at predetermined intervals in the transport direction of the primary continuous sheet 71. Here, the illustrated embodiment shows an example in which a particularly suitable rotor dampening type coating device is used as the spray coating device 80. As shown in FIGS. 3 and 4, the rotor dampening type coating device 80 includes a rotor damping unit 80A, 80A having a spray port directed in a direction perpendicular to the conveying direction of the primary continuous sheet 71. An appropriate number of sheets are arranged according to the width of the sheet (the width in the direction orthogonal to the conveying direction). As shown in FIG. 4, the rotor dampening units 80A have a rotatable hollow disk-shaped rotor 83. The rotor 83 is connected to a driving source via a pulley or the like. It is configured to be driven to rotate, and to supply the adhesive glue F into the rotor 83. As a result, the adhesive paste in the rotor 83, which rotates at an appropriate rotation speed, for example, at a high speed of about 3,000 to 4,000 rpm, is ejected from the outer periphery of the rotor 83 by centrifugal force, and a thin film spray made of fine mist is formed. It is formed. At the same time, a shutter 82 is provided in each of the units 80A, 80A. By controlling the opening / closing and opening of the shutter 83 from the spray flow from the rotor 83, the shutter 82 has a predetermined spray application width and a spray port. Spraying and non-spraying from 81, that is, application and non-application, are selected. The opening and closing of the shutters 82 of the units 80A, 80A are individually controlled, and the application and non-application of the adhesive can be selected and controlled for each unit. For this reason, for example, if the shutter 82 is closed every other unit 80A, 80A, the glue-applied portion 7 formed with a predetermined width along the direction perpendicular to the transport direction will be perpendicular to the transport direction. It is formed in a broken line shape along the direction of In the present invention, the adhesive may be formed in a broken line along the direction orthogonal to the transport direction. The rotor dampening type coating apparatus 80 is excellent in that the particle diameter of the spray particles can be generally reduced to 100 μm or less, and the coating amount can be controlled with high accuracy. In addition, as a specific product of the rotor damping type coating device 80, there is WEKO rotor damping (manufactured by Nikka Corporation). The rotor dampening type coating device 80 is a spray coating device particularly suitable for the present invention. In addition, a so-called spray nozzle type coating device which sprays adhesive glue by compressed air is used. By arranging in the direction orthogonal to the sheet conveyance direction and providing an openable and closable shutter in front of the nozzle opening, and controlling the opening and closing of the shutter, the conveyance of the primary continuous sheet at predetermined intervals in the conveyance direction is possible. It is possible to form an adhesive-glued portion having a predetermined width along a direction orthogonal to the direction. The main components of the adhesive can be exemplified as nitrocellulose, vinyl acetate resin, starch, dextrin, polyvinyl alcohol, CMC, acrylic adhesive, and the like.

  On the other hand, a coating liquid suitable for application by the rotor dampening type coating apparatus 80 according to the present invention has a viscosity of less than 50 mPa · S, particularly 30 mPa · S or less. The coating solution is heated and cooled as needed.

  Next, when the adhesive is applied to the primary continuous sheet 71, the primary continuous sheets 71, 71 are overlapped with each other so that the surface to which the adhesive is applied becomes the inner surface of the laminate, and The two primary continuous sheets 71, 71 are bonded to each other by ply bonding to form a laminated continuous sheet 72 (lamination step). In the illustrated example, the primary continuous sheets 71, 71 face each other, and are passed through a pair of rolls 50, 50 so as to be appropriately pressed against each other to promote adhesion. The sheet 72 is used.

  After the lamination continuous sheet 72 is thus formed, the sewing machine blade 41 is intermittently applied to the lamination continuous sheet 72 in the process of transporting the lamination continuous sheet 72, and a predetermined At the interval L2, perforations 4 extending in a direction perpendicular to the transport direction are formed (perforation forming step). In the illustrated embodiment, the perforations 4 are formed by a plurality of sewing machine blades 41, which are also called perforation rolls, which are spaced from each other in the rotation direction (peripheral surface movement direction) on the peripheral surface and are erected along the axial direction. Is rotated so that the perforated blades 41 are sequentially pressed against the laminated continuous sheet 72 so that the perforations 4 are formed at a predetermined interval L2 in the conveying direction of the laminated continuous sheet 72. I have.

  Here, characteristically in the present invention, the cycle of opening and closing the shutter 82 for controlling the application and non-application of the adhesive in the above-mentioned adhesive applying step and the cycle of applying the sewing machine blade 41 to the laminated continuous sheet 72 are described. Synchronously, the formation position of the perforation 4 is set within the range of the adhesive paste application portion 7. This synchronization can be performed by mechanical control or electronic control. This control method is not limited in the present invention. For example, based on the interval between the sewing machine blades 41 in the perforation roll 40, the rotation speed of the perforation roll 40, the transport speed of the laminated continuous sheet 72 and the primary continuous sheet 71 at each position, the position where the adhesive is applied to the primary continuous sheet 71 (application timing). ) Is calculated by the computer X, and a specific mechanism for opening and closing the shutter 82, for example, a servomotor, is controlled based on an electric signal corresponding to the calculation result. As a result, the interval between the portions where the adhesive is applied is adjusted, and the position where the perforation 4 is formed is within the range of the portion 7 where the adhesive is applied. In the laminated continuous sheet 72 according to the present embodiment manufactured in this manner, the area including the formation position of the perforation 4 and a predetermined range on the leading side and the trailing side with respect to the conveying direction from this position is determined by applying the adhesive paste. A portion 7 is ply-joined by the adhesive paste application portion 7.

  Next, the primary continuous sheets 71, 71 are adhered to each other in the adhesive-glued portion 7 in this manner, and the laminated continuous sheet 72 in which the perforations 4 are formed in the adhesive-glued portion 7 is formed by a known winding process. The intermediate product having the same diameter as the product toilet roll and having a width equal to or more than a plurality of product toilet rolls by the device 55 wrapped around the long paper tube 30 until it has the same diameter as the final product of the toilet roll 10. Log. In the present invention, no contact embossing is provided in each step including the log manufacturing step.

  As described above, if the log 70 is manufactured, the log 70 is moved to the log cutter equipment X4 at the subsequent stage while stocking a plurality of logs by the known log accumulator X3, and the known log is stored in the step (C). The log 70 is cut into a product width by the cutter 91 to obtain the individual toilet rolls 10 and 10. At the same time as the log is cut, the long paper tube is also cut, and the long paper tube becomes an individual paper tube.

  In the method for manufacturing the toilet roll 10 of the present embodiment described above, since the ply bonding is performed without providing the contact emboss or the laminate emboss, the operation problem caused by the contact emboss or the toilet roll 10 may be used. The problem of appearance and the problem of hardening the toilet paper of the laminate embossing do not occur.

  Then, the toilet roll 10 thus manufactured is, as shown in FIG. 5 in particular, at a predetermined interval in a continuous direction, and at a predetermined width in a direction orthogonal to the continuous direction, through an adhesive glue application portion 7, and the primary roll is provided. Toilet paper 11 in which strip-shaped sheets 71A, 71A derived from a continuous sheet are ply-joined and perforations 4 extending in a direction orthogonal to the continuous direction are formed in the adhesive-glued portion 7 thereof is paper. It is wound around the tube 3 and the vicinity including the perforations 4 is adhered and ply-joined, so that the strength of the perforations is increased, and the sewing machine is unintentionally used during use. It is not separated from the stitches 4 and has excellent detachability at the perforations 4 and does not peel off the ply from the cut end. In addition, since the contact emboss is not provided, there is no possibility that the design is degraded due to the contact emboss or a part of the peripheral surface rises on the rib. Further, since the laminate is not embossed, a hard feeling or a rough feeling does not occur. In particular, when embossing is provided, the texture is improved by the embossing.

  Here, in the present invention, the specific range of the predetermined width L1 when forming the adhesive paste application portion 7 having a predetermined width along the direction orthogonal to the transport direction of the primary continuous sheet 71 is not necessarily limited, but is not limited to 40. ６０60 mm. Further, it is desirable that the perforations formed in the adhesive paste application portion 7 be formed in the center of the width L1 of the adhesive paste application portion 7. Therefore, it is preferable that the laminated continuous sheet 72 has the adhesive paste application portion 7 of 10 to 30 mm before and after the perforation 4 in the transport direction. Within this range, when the toilet roll 10 is used, peeling of the ply is sufficiently prevented, and the separation property at the perforation 4 and the like are excellent. In addition, the interval L2 between the perforations 4 can be set as appropriate, but is 224 mm ± 10 mm or 112 ± 10 mm in general toilet paper, and can be similarly set in the present invention.

On the other hand, the application amount of the adhesive in the present invention can be appropriately designed according to the thickness and basis weight of the primary continuous sheet 71, the type of the adhesive, and the presence or absence of embossing. If it is 0.001 to 0.01 g / m ² , a sufficient ply peel strength can be achieved.

Further, the size and the length of the roll of the toilet roll 10 according to the present invention may be the same as those of a general toilet roll, and the width L3 is 100 to 115 mm, the diameter L4 is 100 to 120 mm, and the roll length (of the toilet paper). (Total length) is 18 to 70 m, and the paper tube inner diameter L5 is 35 to 50 mm. The specific composition and composition of the toilet paper are not limited. The paper thickness is 100 to 350 μm, and the rice tsubo per ply is 11.0 to 25.0 g / m ² . It should be noted that the rice tsubo according to the present invention is based on the rice tsubo measurement method of JIS P 8124 (1998), and the paper thickness is the same as that after humidifying under the conditions of JIS P 8111 (1998). An average value measured five times using a dial thickness gauge (thickness measuring device) “PEACOCK G type” (manufactured by Ozaki Seisakusho) under the conditions.

1 ... raw roll, 10 ... toilet roll, 11 ... toilet paper,
Reference numeral 30: long paper tube, 70: log, 72: laminated continuous sheet, 71: primary continuous sheet, 61: convex embossing roll, 62: receiving roll, 81: spray port, 80: spray coating device (rotor damping type) Coating device), L1: width of adhesive paste application portion, L2: perforation interval, 82: shutter, 80A: rotor damping unit, 83: rotor, F: adhesive paste,
7: adhesive glue application part, 50: roll, 41: perforation blade, 4: perforation, 40: perforation roll, 91: log cutter, 3: paper tube, L3: width of toilet roll, L4: diameter of toilet roll, L5: inside diameter of paper tube; 55: take-up device; X3: log accumulator; X4: log cutter equipment; 71A: band-like sheet derived from primary continuous sheet; X: calculator.

Claims (2)

A feeding step of feeding a primary continuous sheet from each of a plurality of raw rolls,
The adhesive glue is intermittently spray-applied to the conveyed primary continuous sheet by a rotor damping type coating apparatus having a plurality of rotor dampening units, and at a predetermined interval in the conveying direction of the primary continuous sheet, orthogonal to the conveying direction. Forming an adhesive glue application portion of a predetermined width in a non-contact manner along the direction in which the adhesive glue is applied,
A laminating step of laminating the primary continuous sheets so that the surface to which the adhesive is applied becomes the inner surface of the laminate to form a laminated continuous sheet,
A perforation blade intermittently applied to the conveyed laminated continuous sheet, at a predetermined interval in the conveying direction of the laminated continuous sheet, a perforation forming step of forming a perforation extending in a direction orthogonal to the conveying direction,
A winding step of winding the laminated continuous sheet on which the perforations are formed, and
In the adhesive glue applying step, the adhesive is sprayed from a plurality of rotor dampening units whose spray ports are directed along a direction orthogonal to the transport direction of the primary continuous sheet, and the shutter of each unit provided in the spray direction is sprayed. period by individually controlling the opening and closing, and to intermittently spray application of adhesive paste in the transport direction with respect to the primary continuous sheet, and directing said perforation blade and period of opening and closing of the shutter in the laminated continuous sheet of To make the perforation forming position fall within the range of the adhesive glue application portion, and the leading and trailing sides with respect to the transport direction from the perforation forming position and this position. A method for manufacturing a toilet roll, wherein a range including the range is a laminated continuous sheet that is ply-joined with an adhesive. A toilet roll in which toilet paper in which a plurality of plies of band-shaped sheets are laminated is wound around a tube core,
The toilet paper is formed by non-contact coating so as to extend at a predetermined interval in a continuous direction and at a predetermined width in a direction orthogonal to the continuous direction, through an adhesive glue applying portion which is not reduced in thickness by contact coating. The band-shaped sheet is ply-joined,
The adhesive glue application portion is formed by applying adhesive glue in a broken line along a direction perpendicular to the transport direction, and the adhesive glue application portion has a perforation extending in a direction orthogonal to the continuous direction. A toilet roll, which is formed.

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