JP2010220799A - Multi-ply sanitary paper manufacturing method - Google Patents

Abstract

The present invention provides a method for producing a multi-ply sanitary paper that is capable of efficiently producing a multi-ply sanitary paper that is less likely to cause product defects such as wrinkles, tarmi, and bends, and that is excellent in aesthetics and texture.
As a convex embossing roll 20, a center line corresponding line Lc corresponding to a center line in the width direction of a sanitary paper is symmetrical to a side edge corresponding part 22A corresponding to both side edges of the sanitary paper on the outer peripheral surface of the roll. Using a line-symmetric oblique line as the axis As, and an oblique line-shaped convex pattern in which the distance from the symmetry axis As increases intermittently from the roll river upper side to the roll river lower side, The convex embossing roll 20 is pressed against the laminate of the base paper, and oblique line embossing derived from the convex pattern is intermittently formed on the side edge corresponding portions corresponding to both side edges of the sanitary paper in the laminate. The manufacturing method of the multi-ply sanitary paper provided with the ply bonding process which couple | bonds in the state which laminated | stacked several sheets of base paper.
[Selection] Figure 1A

Description

  The present invention relates to a method for producing a multi-ply sanitary paper in which a plurality of sanitary papers are joined together such as tissue paper and toilet paper.

  As a sanitary paper such as tissue paper or toilet paper, a multi-ply sanitary paper 100 in which a plurality of sanitary papers 2c and 2d are stacked together as shown in FIGS. 3A and 3B is used.

  In the multi-ply sanitary paper 100 as shown in FIGS. 3A and 3B, a process called ply bonding is performed in order to join a plurality of sanitary papers 2c and 2d. As a method of ply bonding, there is known a method of forming embossing (referred to as “edge embossing”) at portions corresponding to both side edges of sanitary paper in a state where a plurality of sanitary paper base papers are laminated. (For example, refer to Patent Document 1).

More specifically, a laminated body in which a plurality of base papers are laminated between a convex embossing wheel on which a convex pattern is formed and a receiving roll is sandwiched, and the portion corresponding to both side edges of the sanitary paper in the laminated body A method for producing a multi-ply sanitary paper that forms edge embossing derived from a convex pattern has been proposed (see, for example, Patent Documents 2 to 5). According to such a manufacturing method, as shown in FIGS. 3A and 3B, the edge emboss 8B is formed along the side edges E ₃ and E ₄ on the side edge portion 10, and a plurality of sheets are formed by the edge emboss 8B. The multi-ply sanitary paper 100 combined with the sanitary papers 2c and 2d being laminated can be obtained.

JP 2001-120458 A JP 2003-180550 A JP 2005-152078 A JP 2006-271458 A JP 2007-143659 A

  However, in the manufacturing methods described in Patent Documents 2 to 5, product defects such as wrinkles, tarmi, and bending may occur in the obtained multi-ply sanitary paper. Such product defects still have problems in that the touch and texture of the multi-ply sanitary paper such as touch and texture are impaired, and the aesthetics of the product are impaired.

  The present invention has been made in order to solve the above-described problems of the prior art, and it is difficult to produce product defects such as wrinkles, tarmi, and bending, and an efficient multi-ply sanitary paper excellent in aesthetics and texture. It is a manufacturing method which makes it possible to manufacture.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors have arranged oblique convex patterns on portions corresponding to both side edges of the sanitary paper so as to exhibit a square shape toward the rotation direction of the roll. It is possible to achieve the above-mentioned problems by forming the edge embossing on the part corresponding to both side edges of the sanitary paper and forming the edge embossing as a whole and performing the ply bonding process. As a result, the present invention has been completed.

[1] A method for producing a multi-ply sanitary paper in which a plurality of sanitary papers are laminated and is a convex embossing roll, the side corresponding to both side edges of the sanitary paper on the outer peripheral surface of the roll The edge-corresponding portion has a line-symmetric oblique line with a centerline corresponding line corresponding to the widthwise centerline of the sanitary paper as a symmetry axis, and the symmetry axis as it goes from the roll river upper side to the roll river lower side. Using a pattern in which oblique convex patterns with a wide interval are intermittently formed, pressing the convex embossing roll against a laminate of a plurality of base papers, corresponding to both side edges of the sanitary paper in the laminate For multi-ply hygiene, comprising a ply bonding step of joining the plurality of base papers in a stacked state by intermittently forming diagonal line embossing derived from the convex pattern on the side edge corresponding part The method of production.

[2] The method for producing a multi-ply sanitary paper according to [1], wherein the convex embossing roll is formed by intermittently forming a diagonal convex pattern having an inclination angle of 30 to 60 ° with respect to the symmetry axis. .

[3] As the convex embossing roll, the leading end of another convex pattern adjacent to the convex pattern is located on the upper side of the roll river from the end of the convex pattern, and the one convex pattern and the other convex pattern The multi-ply sanitary paper according to the above [1] or [2], in which the relationship in which the protrusions are arranged so as to partially overlap in the rotation direction of the roll is sequentially repeated and the convex pattern is intermittently formed. Manufacturing method.

[4] A wide laminate having a width multiple of the product width of the sanitary paper is used as the laminate, and the line emboss is formed on the wide laminate, and then the wide laminate is used as the sanitary paper. The method for producing a multi-ply sanitary paper according to any one of the above [1] to [3].

[5] The product according to any one of [1] to [3], wherein a product width laminate cut into the product width of the sanitary paper is used as the laminate, and the line emboss is formed on the product width laminate. The manufacturing method of the multiply sanitary paper as described.

  The method for producing a multi-ply sanitary paper according to the present invention is capable of efficiently producing a multi-ply sanitary paper that is less prone to product defects such as wrinkles, tarmi, and bends and that is excellent in aesthetics and texture.

It is a top view which shows typically the state which expand | deployed planarly the outer peripheral surface of the convex embossing roll used for the manufacturing method of the multiply sanitary paper of this invention. It is process drawing which shows typically one Embodiment of the manufacturing method of the multiply sanitary paper of this invention. It is a schematic diagram which shows the state which looked at the manufacturing method shown to FIG. 1B from the side. It is a top view which shows typically the multi-ply sanitary paper obtained by the manufacturing method of this invention. It is sectional drawing which shows typically the A-A 'cross section of the multiply sanitary paper shown to FIG. 2A. It is a top view which shows the conventional multiply sanitary paper typically. It is sectional drawing which shows typically the B-B 'cross section of the multiply sanitary paper shown to FIG. 3A.

  Hereinafter, the best mode for carrying out the method for producing a multi-ply sanitary paper of the present invention will be specifically described with reference to the drawings by way of an example of a method for producing tissue paper. However, the present invention broadly encompasses manufacturing methods having the invention-specific matters, and is not limited to the following embodiments.

[1] Features of the production method of the present invention:
In the manufacturing method of the present invention, a line corresponding to the center line in the width direction of the sanitary paper is formed on a portion (side edge corresponding portion 22A) corresponding to both side edges of the sanitary paper on the outer peripheral surface of the roll as shown in FIG. 1A. The center axis corresponding line Lc is an axisymmetric oblique line having a symmetry axis As, and the distance from the symmetry axis As increases from the upper roll river side (lower side in FIG. 1A) to the lower roll side (upper side in FIG. 1A). It is characterized in that ply bonding is performed using a convex embossing roll 20 in which a widening convex pattern 24A is intermittently formed.

  When the convex embossing roll 20 having the structure as described above is used, a part of the driving force in the rotational direction applied from the convex embossing roll 20 by the effect of the oblique convex pattern 24A corresponds to the both edges of the sanitary paper. Is converted into a force F that widens in the direction of the line (side edge corresponding line Ls). Therefore, ply bonding can be performed in a state where tension is always applied to the base paper in a direction corresponding to both side edges of the sanitary paper. According to such a method, it is difficult for air that causes product defects such as wrinkles, tarmi, and bending to enter between layers of a plurality of base papers, and a small amount of air is also discharged in the direction of the side edge corresponding line Ls. . Accordingly, it is possible to efficiently produce a multi-ply sanitary paper that is less prone to product defects such as wrinkles, tarmi, and bends and that is excellent in aesthetics and texture.

[2] Configuration of the production method of the present invention:
The production method of the present invention is a method for producing a multi-ply sanitary paper 1 in which a plurality of sanitary papers 2a and 2b are joined together as shown in FIGS. 2A and 2B. The ply bonding process described in (1) is provided.

[2-1] Ply bonding process:
The ply bonding process is an intermediate of multi-ply sanitary paper, in which a convex emboss roll is pressed against a laminate of a plurality of base papers to form edge embossing, and a plurality of base papers are laminated by the edge embossing It is the process of couple | bonding by.

[2-1A] Convex embossing roll:
The “convex embossing roll” used in the production method of the present invention is a portion corresponding to both side edges of the sanitary paper on the outer peripheral surface of the roll (side edge corresponding portion 22A), like the convex embossing roll 20 shown in FIG. 1A. Furthermore, it is a line-symmetric diagonal line having a line corresponding to the center line in the width direction of the sanitary paper (center line corresponding line Lc) as the symmetry axis As, and with the symmetry axis As from the upper side of the roll river toward the lower side of the roll. The oblique line-shaped convex pattern 24A in which the interval is widened is formed intermittently.

  In this convex embossing roll 20, the convex pattern 24A that forms the embossing is formed on the outer peripheral surface of the roll. A convex embossing roll 20 shown in FIG. 1A and FIG. 1B is formed with a wheel-like convex portion 26 in which a part of the outer peripheral surface of the roll protrudes in the circumferential direction, and a convex pattern is formed on the top surface of the convex portion 26. In this example, 24A is formed. Instead of projecting a part of the outer peripheral surface of the roll in the circumferential direction, a similar effect can be obtained by attaching another wheel-shaped member to the outer peripheral surface of the roll and forming a convex pattern on the top surface. it can. That is, the “outer peripheral surface of the roll” referred to in this specification includes an outer peripheral surface (top surface) of a member integrated with the roll.

When the convex embossing roll is referred to as “side edge portion corresponding portion”, the portion that will later become both side edges of the sanitary paper (the portion that will become the side edge after being divided into product widths. (Refer to reference numeral 22A in the figure). By forming the convex pattern 24A in this portion, it is possible to obtain a sanitary paper in which embossing (edge embossing) is formed on both side edges. In Figure 1A, there is shown a width corresponding to the product width W ₁ of the sanitary paper in the convex embossing roll 20 as the width W _2.

Incidentally, the term "side edges of the sanitary paper" as used herein, in case of three equally divided multi-ply sanitary paper 1 Product width W ₁ in the width direction as shown in FIG. 2A, the central portion 12 The left and right side portions (side edge portions 10) other than the left and right sides are meant.

  The shape of the convex pattern is a diagonal line that is inclined with respect to a line corresponding to the center line in the width direction of the sanitary paper (center line corresponding line Lc), like the convex embossing roll 20 shown in FIG. 1A. More specifically, the oblique line-shaped convex pattern 24 </ b> A is a line-symmetric oblique line having the center line corresponding line Lc as the symmetry axis As and the distance from the symmetry axis As increases from the roll river upper side toward the roll river lower side. And

For example, in the convex embossing roll 20 shown in FIG. 1A, a pair of convex patterns 24A are arranged in a square shape toward the rotation direction of the roll, and each convex pattern 24A has a center line corresponding line Lc as the symmetry axis As. It is formed in a line-symmetric diagonal shape. Further, each of the convex pattern 24A has a diagonal line shape extending from the width W ₃ the distance between the axis of symmetry As toward the roll upstream side roll downstream side in the width W _4.

  In the present specification, the “slanted line shape” includes not only a straight diagonal line shape such as the convex pattern 24A shown in FIG. 1A but also a curved shape corresponding thereto. For example, the effect of the present invention can be enjoyed even when an arc-shaped convex pattern in which the distance from the symmetry axis As gradually increases is formed. Therefore, the manufacturing method using such a convex embossing roll is also included in the scope of the present invention.

  Further, in this specification, the “center line corresponding line” means a line corresponding to a line that will later become the center line in the width direction of the sanitary paper (the portion that becomes the center line in the width direction after being divided into product widths). It shall be assumed (symbol: Lc in the figure).

  As for the convex embossing roll used for the manufacturing method of this invention, it is preferable that the oblique convex pattern 24A whose inclination | tilt angle (theta) with respect to the symmetry axis As is 30-60 degrees is formed like the convex embossing roll 20 shown to FIG. 1A. . By setting it as this range, the effect that ply bonding can be performed in a state where tension is always applied to the base paper in a direction corresponding to both side edges of the sanitary paper can be obtained more reliably.

  When the inclination angle θ is less than 30 °, there is a possibility that the force F that widens the base paper in the direction of the side edge corresponding line Ls becomes excessive and the base paper is easily broken. On the other hand, when the inclination angle θ exceeds 60 °, the force F for widening the base paper in the direction of the side edge corresponding line Ls becomes small, and the desired effect may not be obtained. In order to obtain the effect more reliably, it is preferable that the inclination angle θ is in the range of 45 to 60 °.

  The convex embossing roll used in the manufacturing method of the present invention has the convex pattern 24A intermittently formed like the convex embossing roll 20 shown in FIG. 1A. “Intermittent” means that the individual embosses are not connected to each other and form an independent diagonal pattern. In order to form the emboss uniformly, it is preferable that the convex patterns 24A are arranged at equal intervals in the roll rotation direction as shown in FIG. 1A.

In the manufacturing method of the present invention, as the convex embossing roll 20 shown in FIG. 1A, as the convex embossing roll 20, the starting end P of another convex pattern 24A adjacent to the convex pattern 24A from the end P1 of the _one convex pattern 24A. ₂ is positioned on the upper side of the roll river, and the relationship in which one convex pattern 24A and the other convex pattern 24A are arranged so as to partially overlap in the rotation direction of the roll is repeated sequentially (overlapping length α). It is preferable to use a pattern in which the convex pattern 24A is formed intermittently.

  By arranging the convex patterns so as to partially overlap as described above, the side edges from the interlayer of the base paper constituting the laminate (particularly the portion corresponding to the central portion of the sanitary paper (central portion corresponding portion 28A)). It is possible to effectively prevent the air discharged in the direction of the corresponding line Ls from entering another area. A convex embossing roll having such a convex pattern is effective when used in a method of performing ply bonding on a wide laminate having a width multiple of the product width and then cutting it into the product width of sanitary paper. This point will be described later.

  The overlap length α is not particularly limited. However, it is preferable to set the overlap length α so that the length of the convex pattern 24A is 5 to 50% of the length β in the roll rotation direction. If the overlap length α is less than 5% of the length β, the effect of blocking air intrusion may be insufficient. When the overlap length α exceeds 50% of the length β, air flows from a portion corresponding to the central portion of the sanitary paper (hereinafter referred to as “central portion corresponding portion”) in the direction of the side edge corresponding line Ls. May be difficult to discharge.

[2-1B] Laminate:
The “laminate” used in the production method of the present invention is a laminate of a plurality of base papers. There is no restriction | limiting in particular about the kind of base paper, A conventionally well-known base paper for sanitary paper can be used. For example, a base paper for tissue paper made to a basis weight of 10 to 18 g / m ² can be preferably used. The number of base papers is not particularly limited, but is usually two and may be three or more.

As the “laminate”, a wide laminate having a width multiple of the product width of sanitary paper can be used. In the case of using a wide laminate, after obliquely forming oblique line embosses 38 on the wide laminate 34 as shown in FIGS. 1B and 1C (that is, after ply bonding), thereby isolate the wide laminate 34 to the product width W ₁ of the sanitary paper (cut step 40). Such a method is suitable for mass production because a plurality of multi-ply sanitary papers 1 can be obtained at a time.

  Although the formation method of a "wide laminated body" is not specifically limited, For example, it can form by the method as shown to FIG. 1C. In the method shown in FIG. 1C, base paper rolls 31a and 31b are prepared by winding long and wide base papers 32a and 32b into a large-diameter roll, and the base papers 32a and 32b are formed from the base paper rolls 31a and 31b. It is fed out in the direction and joined by pressing rolls 33a and 33b, and the base papers 32a and 32b are laminated to form a wide laminate 34.

  The width of the “wide laminate” is not particularly limited. However, in the case of manufacturing tissue paper, the width is generally 5 to 10 times the product width of the tissue paper. On the other hand, when manufacturing roll-like sanitary paper, such as toilet paper, it is common to comprise in width 10-30 times the product width of roll-like sanitary paper.

  A convex embossing roll 20 shown in FIG. 1A is for forming an emboss on a wide laminate. In the case of the convex embossing roll 20 shown in the figure, a force F that widens the base paper in the direction of the side edge corresponding line Ls acts by the convex pattern 24A formed on the side edge corresponding part 22A, and is adjacent to the side edge corresponding part 22A. A force F ′ that widens the base paper in the direction of the side edge corresponding line Ls acts by the convex pattern 24B formed on the side edge corresponding part 22B. Therefore, the wrinkles or tarmi of the base paper or the air that has entered the interlayer of the base paper converges in the vicinity of the side edge corresponding line Ls. The wrinkles, tarmi, and air are released when the wide laminate 34 is cut in the subsequent cutting step.

  At this time, if the convex embossing roll 20 shown in FIG. 1A is used so that the pattern of the convex pattern 24A (or convex pattern 24B) is partially overlapped, the convex pattern 24A is changed from the center corresponding part 28A. The air discharged beyond the side edge corresponding line Ls is blocked by the convex pattern 24B. Therefore, it is preferable in that air does not easily enter the portion corresponding to the central portion of the sanitary paper adjacent to the convex pattern 24B.

  On the other hand, as the “laminate”, a product width laminate cut into product widths of sanitary paper may be used. In such a method, since the emboss formation (ply bonding) is performed on the laminated body that is preliminarily cut into the product width and is not constrained on both side edges, product defects such as wrinkles, talmi, and bending are less likely to occur. It is preferable in that it is easy to obtain a multi-ply sanitary paper excellent in aesthetics and texture.

[2-1B] Emboss formation:
In the manufacturing method of the present invention, as shown in FIG. 1B, the convex embossing roll 20 is pressed against the wide laminate 34 of the plurality of base papers 32a and 32b, and the both sides of the sanitary paper in the wide laminate 34 are pressed. By joining the corresponding portions (side edge corresponding portions 22A and 22B) with diagonal line embosses 38 derived from the convex patterns 24A and 24B intermittently, a plurality of base papers 32a and 32b are joined in a stacked state. (Ply bonding).

  The embossing method is not particularly limited except that the convex embossing roll as described above is used. However, as shown in FIG. 1C, the wide laminate 34 fed in the longitudinal direction is sandwiched between the convex embossing roll 20 and the receiving roll 35 and pressed, and the oblique line embossing 38 is intermittently formed. A method of forming is preferable.

In the manufacturing method of the present invention, as shown in FIG. 1B, the hatched line emboss 38 is along the portion corresponding to the side edge portion 10 of the multi-ply sanitary paper 1 and along the portion corresponding to the side edges E ₁ and E _2. To form. There are no particular restrictions on the emboss width and formation position. The “line embossing” means a linear or curved embossing pattern derived from the convex pattern of the convex embossing roll.

  The length and width of the line emboss are not particularly limited. However, the length is preferably 1 to 10 mm, and more preferably 2 to 8 mm. The width is preferably 0.5 to 2 mm, and more preferably 0.8 to 1.2 mm. It should be noted that all the embossed shapes do not have to be the same, and embossments having different shapes may be combined.

  The “embossing” method is not particularly limited except that the convex embossing roll as described above is used. For example, as the receiving roll paired with the convex embossing roll, a matched steel embossing using a concave embossing roll in which a concave pattern complementary to the convex pattern is formed can be cited. However, rubber steel embossing using a rubber roll whose surface, such as a metal roll, is covered with rubber is preferable as the receiving roll because the embossing formed is less likely to collapse than other embossing methods.

[2-2] Carving step:
The “cutting step” is a step of cutting the base paper laminate into the sanitary paper product width. In the manufacture of sanitary paper, as shown in FIG. 1C, a laminated body is formed while continuously supplying the base papers 32a and 32b from the base paper rolls 31a and 31b formed by winding the long base papers 32a and 32b to a large diameter. Often to do. When employing such a method, as shown in FIG. 1B, so that the long laminated body 44 which is cut into the product width W ₁ in isolation step 40 is formed.

  As already described, this cutting step may be performed after the ply bonding step or may be performed prior to the ply bonding step. The method shown in FIG. 1B is an example in which a cutting step 40 is performed after the ply bonding step 30, and a long laminate 44 in which oblique line embosses 38 are intermittently formed is obtained. On the other hand, when the cutting process is performed prior to the ply bonding process, a long laminate having no oblique line embossing is obtained.

  There are no particular restrictions on the means of carving. For example, a method of cutting with a cutter equipped with a round blade or a band saw can be employed. As the cutter, a multi-blade saw, a round blade saw, a table-type multi-blade saw or the like can be suitably used.

In the cutting step 40 of the method shown in FIG. 1B and FIG. 1C, the wide laminated body 34 in which the line emboss 38 is formed in a plurality of places is used by the slitter 42 provided with the round blade 46. gap shaped for line embossing 38 cut along the (multi-ply sanitary side edges E1, lines corresponding to E ₂ of the sheet 1) (cutting line 43), the hatched-like line embossing 38 along the cutting line 43 is formed A plurality of long laminated bodies 44 are formed. As shown in FIG. 1C, by sandwiching the wide laminate 34 between the slitter 42 and the anvil roll 41, the wide laminate 34 is cut into product widths. Even when the cutting process is performed prior to the ply bonding process, a method similar to the cutting method shown in FIGS. 1B and 1C can be employed.

[2-3] Cutting process:
A multi-ply sanitary paper having a predetermined width and length can be obtained by cutting a long laminate formed with edge embossing obtained through a ply bonding process and a cutting process into a product length.

There is no particular limitation on the cutting method. For example, it can cut | judge using the cutter provided with the round blade or the band saw similarly to the cutting process. In cutting process 50 of the method shown in FIG. 1B, by cutting the long laminated body 44 as it is to the product length L ₁ (cutting line 52), the edge embossing 8A is formed, the product width W ₁ and Product Length to obtain a multi-ply sanitary paper 1 of L _1.

  However, in the case of multi-ply sanitary paper for tissue paper, it is common to produce a plurality of multi-ply sanitary papers by a method of cutting the long laminate after folding. The folding and cutting as described above can be easily performed by using a folding processing machine such as a folding plate type processing machine or a rotary cylinder type processing machine.

  For example, when a folded plate processing machine (also referred to as “multiple machine”) is used, a plurality of long laminates are folded to form a long tissue bundle, and then a long tissue bundle is formed. The multi-ply sanitary paper cut into the product width in the folded state can be manufactured by the method of cutting the product into the product length.

  In addition, when a rotary cylinder type processing machine (also referred to as “interfolder”) is used, two long laminates are alternately folded and cut while rotating the cylinder. By repeating the above, it is possible to manufacture a multi-ply sanitary paper that is cut into the product width in a folded state.

  Multi-ply sanitary paper manufactured by these methods is commercialized as, for example, boxed cartons.

[3] Application to rolled sanitary paper:
The method for producing a multi-ply sanitary paper of the present invention can also be applied to the production of roll-like sanitary paper (toilet paper, kitchen towel, etc.). The “roll-like sanitary paper” refers to a sheet obtained by winding a long sanitary paper whose end is fixed to the core tube into a roll shape around the core tube.

Even in the case of rolled sanitary paper as described above, similarly to the method shown in FIGS. 1B and 1C, the tip of the long laminated body 44 which line embossing 38 is intermittently formed on the core tube of the product width W ₁ After fixing and winding up the product length, the end may be fixed to the roll surface of the long laminate 44 wound up.

  However, when the production method of the present invention is applied to roll-like sanitary paper, it is preferable to employ the following method.

[3-1] Ply bonding process:
First, similarly to the method shown in FIG. 1B and FIG. 1C, ply bonding is performed in which a plurality of base papers 32 a and 32 b are joined in a stacked state by intermittently forming oblique line embosses 38 on the wide laminate 34. Step 30 is performed. Thus, having a multiple of the width of the product width W _1, to form a wide laminate 34 already ply bonding was made.

[3-2] Log formation process:
Next, the front end of the wide laminate is fixed to a long core tube having a length corresponding to the width of the wide laminate, and the wide laminate is wound around the long core tube by the product length. Further, the end of the wide laminate is wound and fixed to the surface of the wide laminate that has been rolled. Thereby, the log which is a wide roll-like sanitary paper is obtained.

  The “long core tube” is a member that serves as a winding core for rolled sanitary paper, and a paper tube made of thick paper such as cardboard is usually used. Although different depending on the type of roll-like sanitary paper, a paper tube having an outer diameter of 35 to 50 mmφ and a thickness of 0.5 to 1.5 mm is preferably used. As this long core tube, one having a length of 10 to 30 times the width of the roll-like sanitary paper is used so that a plurality of roll-like sanitary papers can be produced at a time.

  Fixing the wide laminate at the beginning of the wide core (referred to as “pickup”) and fixing the end of the wide laminate onto the surface of the rolled wide laminate (referred to as “tail seal”) are water-soluble. It can carry out using adhesives, such as an adhesive. The water-soluble adhesive may be attached to the long core tube or the like by a method such as coater coating or spraying.

  Winding of the wide laminate can be performed by a winding device such as a winder. The winding length varies depending on the type of roll-like sanitary paper. For example, in the case of rolled toilet paper, it is generally 25 to 90 m, and in the case of rolled kitchen towel, it is generally 10 to 20 m.

[3-3] Carving step:
Finally, the log, which is a wide roll sanitary paper, is cut into product widths to obtain a roll sanitary paper, which is a multi-ply sanitary paper. The log can be cut using a conventionally known cutting blade such as a log saw (round blade) or a band saw (flat blade). A blade having a thickness of 2 to 10 mm is preferably used. The product width varies depending on the type of roll sanitary paper. For example, in the case of rolled toilet paper, it is generally 105 to 114 mm, and in the case of rolled kitchen towel, it is generally 210 to 228 mm.

  The multi-ply sanitary paper manufactured in this way is commercialized as toilet paper, kitchen towel, etc. packed in a gusset tube bag, for example.

  The method for producing a multi-ply sanitary paper according to the present invention is suitably used as a method for producing household sanitary paper such as tissue paper, toilet paper, and kitchen towel.

1, 100: Multi-ply sanitary paper, 2a, 2b, 2c, 2d: Base paper, 6: Side edge, 8A, 8B: Edge embossing, 10: Side edge, 12: Center, 20: Convex embossing roll, 22A , 22B: side edge corresponding part, 24A, 24B: convex pattern, 26: convex part, 28A: central part corresponding part, 30: ply bonding process, 31a, 31b: base paper roll, 32a, 32b: base paper, 33a, 33b : Pressing roll, 34: wide laminate, 35: receiving roll, 38: line embossing, 40: cutting process, 41: anvil roll, 42: slitter, 43: cutting line, 44: long laminate, 46: round blade , 50: cutting process, 52: cutting line, W ₁ : product width, W ₂ : width corresponding to product width, W ₃ , W ₄ : width, L ₁ : product length, E ₁ , E ₂ , E ₃ , E ₄ : side edge.

Claims (5)

A method for producing a multi-ply sanitary paper, in which a plurality of sanitary papers are laminated together,
As a convex embossing roll, line symmetry with a center line corresponding line corresponding to a center line in the width direction of the sanitary paper as a symmetry axis on a side edge corresponding part corresponding to both side edges of the sanitary paper on the outer peripheral surface of the roll Using a diagonal pattern, and an oblique line-shaped convex pattern in which the interval with the symmetry axis widens from the upper side of the roll river toward the lower side of the roll river,
The convex embossing roll is pressed against a laminate of a plurality of base papers, and oblique line embossing derived from the convex pattern is formed on a side edge portion corresponding to both side edges of the sanitary paper in the laminate. A method for producing a multi-ply sanitary paper, comprising a ply bonding step in which the plurality of base papers are joined in a stacked state by being intermittently formed.   2. The method for producing a multi-ply sanitary paper according to claim 1, wherein the convex embossing roll is formed by intermittently forming a diagonal convex pattern having an inclination angle of 30 to 60 ° with respect to the symmetry axis.   As the convex embossing roll, the starting end of another convex pattern adjacent to the convex pattern is located on the upper side of the roll than the end of the convex pattern, and the convex pattern and the other convex pattern are The manufacturing method of the multi-ply sanitary paper according to claim 1 or 2, wherein a relationship in which the convex patterns are intermittently formed by sequentially repeating the relationship of being partially overlapped in the rotation direction.   As the laminate, a wide laminate having a width multiple of the product width of the sanitary paper is used, and after the line embossing is formed on the wide laminate, the wide laminate is used as the product width of the sanitary paper. The manufacturing method of the multi-ply sanitary paper according to any one of claims 1 to 3.   The multi-layer according to any one of claims 1 to 3, wherein a product width laminated body cut into product widths of the sanitary paper is used as the laminated body, and the line embossing is formed on the product width laminated body. Manufacturing method of ply sanitary paper.

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