JP2010187890A - Method for manufacturing roll-shaped sanitary paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a roll-shaped sanitary paper which efficiently manufactures the roll-shaped sanitary paper which has excellent appearance and texture by reducing a failure of a product such as wrinkle, slack, bending, etc. <P>SOLUTION: The method for manufacturing the roll-shaped sanitary paper includes a process of obtaining an embossed base paper 10 by causing a wide-width base paper 6 to travel in a length direction and forming thin and long emboss 8 which has array patterns expanding in an intermittent truncated chevron shape from a boundary 3, with the inner area in the width direction of the wide-width base paper 6 as the boundary 3, toward both end edges 6a and 6b in the width direction, and backward from the front in the traveling direction of the wide-width base paper 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing rolled sanitary paper such as toilet paper and kitchen towels.

  In general, roll-like sanitary paper such as toilet paper and kitchen towel is manufactured by the following method.

  First, the starting end portion of the wide base paper is fixed to the outer peripheral surface of the long core tube, and the wide base paper is wound around the outer periphery of the long core tube by the product length to form a roll. Next, a wide roll sanitary paper (log) is formed by fixing the end portion of the wide base paper to the outer peripheral surface of the roll. Thereafter, if the log is cut into a product width with a cutting blade such as a log saw, roll-like sanitary paper such as toilet paper can be obtained (see, for example, Patent Document 1 (FIG. 1)).

  In addition, in order to improve the beauty | look, texture, etc. on a roll-like sanitary paper, a specific unevenness | corrugation (emboss) pattern may be formed, for example by embossing (for example, refer patent document 2).

JP-A-2005-87788 JP 2003-73999 A

  However, depending on the manufacturing method disclosed in Patent Document 1 or the like, a wide base paper may be wound around the outer periphery of the long core tube in a state where wrinkles are formed or bent. In some cases, the roll-like sanitary paper obtained by winding the wide base paper in such a state may include product defects such as wrinkles, wrinkles, bends, and bending due to the wide base paper being wrinkled or bent. The roll-like sanitary paper having such product defects has problems such that the texture such as the touch and the touch is impaired, and the beauty (aesthetic appearance) is impaired.

  The present invention has been made in view of the above-described problems of the prior art, and the problem is that a roll-like shape that is less prone to product defects such as wrinkles, tarmi, and bends and that has excellent aesthetics and texture. An object of the present invention is to provide a method for producing a roll-like sanitary paper capable of efficiently producing a sanitary paper.

  As a result of diligent study to achieve the above-mentioned problems, the present inventors made an inner region in the width direction of the wide base paper as a boundary, from this boundary toward both ends, and from the front to the rear in the running direction of the wide base paper. It has been found that the above problem can be achieved by forming an elongated emboss having an array pattern that spreads in an intermittent C-shape, and the present invention has been completed.

  That is, according to this invention, the manufacturing method of the roll-shaped sanitary paper shown below is provided.

  [1] The wide base paper is caused to travel in the length direction, with the inner region in the width direction of the wide base paper as a boundary, from the boundary toward both edges in the width direction, and from the front to the rear in the travel direction of the wide base paper Forming a long embossed base paper by forming an elongated emboss having an array pattern that spreads intermittently in the shape of a cross, and winding the embossed base paper around the outer periphery of a long core tube to create a wide log A method for producing a roll-like sanitary paper, comprising: a step of obtaining a roll-like sanitary paper by cutting the log into product widths.

  [2] In the step of obtaining the embossed base paper, a center line that bisects the wide base paper in the width direction is defined as the boundary, and the embossing is performed on both sides of the boundary with the same inclination with respect to the traveling direction. The manufacturing method of the roll-form sanitary paper as described in said [1] to form.

  [3] In the step of obtaining the embossed base paper, a line deviated from a center line that bisects the wide base paper in the width direction to one side in the width direction is defined as the boundary, and the both sides of the boundary differ with respect to the traveling direction. The method for producing a roll-like sanitary paper according to [1], wherein the emboss is formed with an inclination.

  [4] In the step of obtaining the embossed base paper, the roll shape according to any one of [1] to [3], wherein the emboss is formed with an inclination angle of 30 to 60 ° with respect to the traveling direction. Sanitary paper manufacturing method.

  According to the method for producing a roll-like sanitary paper of the present invention, it is possible to efficiently produce a roll-like 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 schematic diagram which shows an example of the process of obtaining the base paper with an emboss in the manufacturing method of the roll-shaped sanitary paper of this invention. It is a schematic diagram which shows an example of the arrangement pattern of the emboss formed in the wide base paper. It is a perspective view which shows typically an example of the roll-shaped toilet paper manufactured by the manufacturing method of the roll-shaped sanitary paper of this invention. It is a schematic diagram which shows the manufacturing process of roll-shaped toilet paper. It is a schematic diagram which shows the outline of the mechanism in which shape defects, such as a wrinkle, are eliminated.

  Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments, and based on ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that modifications, improvements, and the like appropriately added to the embodiments described above fall within the scope of the present invention.

[1] Manufacturing method of rolled sanitary paper:
FIG. 1 is a schematic diagram showing an example of a process for obtaining an embossed base paper in the method for producing a roll-like sanitary paper of the present invention. The roll sanitary paper manufacturing method of the present invention, for example, as shown in FIG. 1, causes the wide base paper 6 to run in the length direction, and sets the inner region in the width direction of the wide base paper 6 as the boundary 3. Embossed by forming an elongated emboss 8 having an array pattern that spreads intermittently in a U-shape toward both ends 6a, 6b in the width direction and from the front to the rear in the running direction of the wide base paper 6. A step of obtaining the base paper 10 is provided.

  The roll sanitary paper manufacturing method of the present invention is characterized in that an elongated emboss 8 having a specific arrangement pattern is formed on a wide base paper 6 to produce an embossed base paper 10. When the elongated emboss having such a specific arrangement pattern is formed on the wide base paper, even if there is a shape defect such as a wrinkle or a bent portion formed unintentionally on the wide base paper (base paper with emboss). When the wide base paper (embossed base paper) is wound around the outer periphery of the long core tube, these shape defects are easily resolved. Therefore, according to the method for producing a roll-like sanitary paper of the present invention, it is possible to produce a roll-like sanitary paper having an extremely low occurrence rate of product defects such as wrinkles, tarmi, and bending, and having excellent aesthetics and texture. .

[1-1] Embossing process:
As shown in FIG. 1, in the roll sanitary paper manufacturing method of the present invention, an elongated emboss 8 having a specific arrangement pattern is formed on a wide base paper 6 to obtain an embossed base paper 10 (embossing step). . A method for forming the emboss on the wide base paper is not particularly limited, but usually a pair of emboss rolls 12 as shown in FIG. 1 are used. Examples of the embossing method include matched steel, rubber to steel, point to point, and nested methods. Especially, it is preferable to form embossing with rubber-to-steel. “Rubber-to-steel” is a method of embossing by sandwiching an object (wide base paper) between a rubber roll whose surface is coated with rubber and a metal roll whose surface has a convex pattern. . This method is preferable in that the embossing formed is less likely to collapse compared to other embossing methods such as matched steel.

  FIG. 2 is a schematic diagram showing an example of an embossed array pattern formed on a wide base paper. In the method for producing roll-like sanitary paper according to the present invention, as shown in FIGS. 1 and 2, intermittent paper is fed from the boundary 3 toward both end edges 6a, 6b in the width direction and from the front to the rear in the running direction. An elongated emboss 8 having an array pattern extending in a letter shape is formed on the wide base paper 6. The boundary 3 is a place where the arrangement direction of the embosses 8 is switched, and exists in the inner region of the wide base paper 6 in the width direction. The “inner area in the width direction of the wide base paper” means an area other than both end edges in the width direction of the wide base paper. That is, the boundary at which the embossing direction is switched may be unevenly distributed on one edge side in the width direction of the wide base paper.

  “Intermittent” means that the embosses adjacent to each other in the length direction are not connected to each other in a broken line shape or a dotted line shape instead of being linear (groove shape). In addition, the “arrangement pattern spreading in a letter C shape” does not need to be an arrangement pattern in which a plurality of embosses 8 are aligned in a straight line as shown in FIGS. 1 and 2, for example, a curve that gradually expands or contracts. The arrangement pattern may be arranged in order.

  Each of the embosses formed has an elongated shape. Although the length of each emboss is not specifically limited, For example, it is 1-10 mm, Preferably it is about 2-8 mm. Moreover, the width | variety of each embossing is although it does not specifically limit, For example, it is 0.5-2 mm, Preferably it is about 0.8-1.2 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.

  FIG. 5 is a schematic diagram showing an outline of a mechanism for eliminating shape defects such as wrinkles. As shown in FIG. 5, when the embossing roll is rotated, a force F in a direction perpendicular to the longitudinal direction of the elongated embossing 8 to be formed acts on the wide base paper 6. As a result, the conveying force in the running direction is applied to the wide base paper 6 by the component force F1 of the force F, and the tension in the width direction is applied to the wide base paper 6 by the component force F2 of the force F. That is, in the sanitary paper manufacturing method of the present invention, since the elongated emboss 8 having a predetermined arrangement pattern is formed, the wide base paper 6 is applied with tension in the width direction thereof. Can be conveyed in the traveling direction, and the wide base paper 6 is prevented from being wrinkled or bent.

  When embossing is performed with the center line that bisects the wide base paper as the boundary 3 and the embossing is formed on the both sides of the boundary 3 (center line), the embossing 8 is usually provided with the same inclination θ with respect to the traveling direction. Form (see FIG. 5). On the other hand, in the case where the emboss 8 is formed with the boundary 3 being a line biased to one side in the width direction from a center line that bisects the wide base paper in the width direction, the emboss 8 is run on both sides of the boundary 3 (biased line). It is preferable to form the emboss 8 with different inclinations θ with respect to the direction. In the case of forming the emboss 8 with the line biased to one side in the width direction as the boundary 3, by changing the inclination of the formed emboss 8 on the left and right, it is possible to balance F2 applied to the wide base paper 6, It is possible to prevent displacement to one side. More specifically, the tension in the width direction acting on the wide base paper 6 is balanced by forming the emboss 8 by setting “inclination angle θ on the wide side> inclination angle θ on the narrow side”. Is preferred.

  When the inclination angle θ of the emboss 8 to be formed is too large, the component force F2 of the generated force F becomes too small, and the tension applied in the width direction of the wide base paper 6 tends to decrease. On the other hand, if the inclination angle θ is too small, the component force F1 of the generated force F becomes too small, and the conveying force of the wide base paper 6 tends to decrease. From such a viewpoint, the inclination angle θ of the emboss 8 to be formed is preferably set in a range of 30 to 60 °, and more preferably set to 45 to 60 °.

  The “wide base paper” is a base paper that is an intermediate of the roll-like sanitary paper, and usually has a width that is 10 to 30 times the width of the roll-like sanitary paper. The “wide base paper” includes multi-ply sheets in which a plurality of base papers are superposed, such as a single ply consisting of only one base paper, and a two ply in which two base papers are superposed.

  In order to run the wide base paper in the length direction, for example, as shown in FIG. 1, the wide base paper 6 is sent out from a jumbo roll 50 wound with a large diameter. Further, for example, a perforation roll 14 as shown in FIG. 1 may be used on the embossed base paper, and perforations for cutting may be formed at appropriate intervals.

[1-2] Winding process:
In the method for producing roll-like sanitary paper according to the present invention, as shown in FIG. 1, a winder 54 is used to wind the embossed base paper 10 around the outer periphery of the long core tube to obtain a wide log 56 (winding up). Process). 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 mm and a thickness of 0.5 to 1.5 mm is preferably used. This long core tube has a length 10 to 30 times the width of the roll-like sanitary paper so that a plurality of roll-like sanitary papers can be produced at a time.

  At the start of winding, it is preferable to apply an adhesive (pickup glue) to the outer peripheral surface of the long core tube and bond and fix the starting end of the embossed base paper to the outer peripheral surface of the long core tube. As the adhesive, a water-soluble adhesive is preferable. In addition, as a method of apply | coating an adhesive agent to the outer peripheral surface of a long core pipe, the method of apply | coating with a coater, the method of spraying with a spray, etc. can be mentioned, for example.

  The winding length of the embossed base paper varies depending on the type of roll-like sanitary paper to be manufactured. 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.

  At the end of winding, for example, as shown in FIG. 1, an adhesive is applied to the end portion of the embossed base paper 10 or the outer peripheral surface of the formed roll in the tail seal portion 16, and the embossed base paper is applied to the outer peripheral surface of the roll. It is preferable to bond and fix 10 terminal portions. As the adhesive, a water-soluble adhesive is preferable. The log 56 which is a wide roll-like sanitary paper can be obtained by the above operation.

[1-3] Cutting step:
In the method for producing roll-like sanitary paper of the present invention, a wide log is cut into a product width (cutting step). 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.

  As a result of the above operation, a plurality of roll-like sanitary papers 20 and 30 (roll-like toilet paper 62) on which the elongated embosses 8 having an array pattern arranged intermittently (broken line) as shown in FIG. 3 are formed. Can be manufactured. In FIG. 3, reference numeral 18 denotes a core tube.

[2] Applicable objects of the method for producing roll-shaped sanitary paper of the present invention:
The manufacturing method of the roll-shaped sanitary paper of this invention is applicable to the manufacturing process of roll-shaped toilet paper as shown, for example in FIG.

[2-1] Log formation process:
In the manufacturing process of the roll-shaped toilet paper shown in FIG. 4, first, the wide base paper 52 is sent out from the jumbo roll 50, and an elongated emboss having a specific arrangement pattern is formed on the wide base paper 52 using the embossing roll 12, An embossed base paper 10 is obtained. The obtained embossed base paper 10 is wound around a long core tube by a winder 54 to obtain a log 56 which is a wide roll sanitary paper.

[2-2] Cutting step:
In the manufacturing process of rolled toilet paper shown in FIG. 4, the log 56 is temporarily accumulated in the accumulator 58. Next, the two logs 56 are sequentially sent out so as to run side by side and cut into a product length by the log saw 60 to obtain a roll-shaped toilet paper 62. The number of logs to be run in parallel is not limited to two, and may be four, for example.

[2-3] Packaging process:
The roll-shaped toilet paper 62 obtained by cutting with the log saw 60 is inserted into the packaging bag 64 as a set of 8 to 24 pieces (4 to 12 pieces × 2 tiers), the opening is sealed, and the packaging body 66. And

[2-4] Box packing process:
A plurality of packaging bodies 66 are packed as a set in a cardboard box 68 to form a boxed body 70 and shipped.

  The method for producing roll-like sanitary paper of the present invention is suitable as a method for producing roll-like sanitary paper such as roll-like toilet paper and roll-like kitchen towels.

1, 20, 30: roll-like sanitary paper, 2: long core tube, 3: boundary, 6a, 6b, edge, 6, 52: wide base paper, 8: embossed, 10: base paper with emboss, 12: embossed roll , 14: perforated roll, 16: tail seal portion, 18: core tube, 50: jumbo roll, 54: winder, 56: log, 58: accumulator, 60: log saw, 62: roll toilet paper, 64: Packaging bag, 66: Packaging body, 68: Cardboard box, 70: Packing body

Claims (4)

While running the wide base paper in the length direction, with the inner region in the width direction of the wide base paper as a boundary, intermittently from the boundary toward both ends in the width direction and from the front to the back in the running direction of the wide base paper Forming an embossed elongated shape having an array pattern that spreads in a typical C-shape to obtain an embossed base paper;
Winding the embossed base paper around the outer circumference of a long core tube to obtain a wide log;
Cutting the log into product widths to obtain a plurality of rolled sanitary papers. In the step of obtaining the embossed base paper,
The roll-like sanitary paper according to claim 1, wherein a center line that bisects the wide base paper in the width direction is defined as the boundary, and the emboss is formed on both sides of the boundary with the same inclination with respect to the traveling direction. Manufacturing method. In the step of obtaining the embossed base paper,
2. The emboss is formed on both sides of the boundary with different inclinations with respect to the traveling direction, with a line deviated from a center line that bisects the wide base paper in the width direction to one side in the width direction as the boundary. A method for producing a roll-like sanitary paper as described in 1. In the step of obtaining the embossed base paper,
The manufacturing method of the roll-form sanitary paper as described in any one of Claims 1-3 which form the said embossing with the inclination of 30-60 degrees of inclination angles with respect to the said running direction.

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