JP5331396B2 - Toilet roll manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a one- ply type toilet roll.

  Toilet rolls, one of household sanitary papers, are wound with thin paper, and are used frequently on a daily basis in addition to functional elements such as moderate strength, water absorption and water solubility. In addition, the texture such as a good touch feeling is also regarded as important.

  In order to obtain a thin paper having a good touch feeling, for example, in Patent Document 1, papermaking is performed by setting suitable conditions such as the blending ratio of raw conifer pulp and hardwood pulp, and the average fiber length and fiber width of the pulp Techniques to do this are disclosed.

JP 2008-88612 A

  However, the thin paper usually has different smoothness between the front and back surfaces, such as a smooth surface and a rough surface, no matter how the texture is improved. When the thin paper is wound so that the rough surface becomes the outer peripheral surface of the toilet roll, the touch feeling of the rolled toilet roll is not good. In addition, toilet rolls wound so that the rough surface of the thin paper becomes the outer peripheral surface have a large frictional resistance on the outer peripheral surface of the toilet roll. Inconveniences such as tearing tend to occur.

In view of said problem, the subject of this invention is providing the manufacturing method of the toilet roll which can obtain the toilet roll excellent in the smooth touch feeling and handling in a winding state.

To solve the above problems, according to the present invention, the following method for producing preparative Lee let rolls are provided.

[1] A thin layer is formed from pulp, and then the dehydrated wet paper is pressure-bonded to an outer peripheral surface of a dryer cylinder, the dryer cylinder is heated, and hot air is blown from the periphery of the dryer cylinder to the wet paper. By drying the wet paper, a drying process of finishing the sheet into one long continuous thin paper having a smooth surface on the side in contact with the dryer cylinder and a rough surface on the other surface, and the single thin paper is wound. the original paper winding forming a fringed material roll, after solving the tissue paper has been wound on the material roll, by the smooth surface is wound the one of the thin paper again so that the outer peripheral surface A log having the smooth surface of one thin paper as an outer peripheral surface is formed, and the log is cut to a predetermined width to obtain a toilet roll having the smooth surface as an outer peripheral surface of one sheet of thin paper. A method for manufacturing a toilet roll having a construction process.

According to the method for producing a toilet roll of the present invention, it is possible to obtain a toilet roll excellent in smooth touch feeling and handling in a wound state.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and changes, modifications, and improvements can be added without departing from the scope of the invention.

A. Toilet roll obtained by the production method of the present invention:
A-1. Overview of toilet roll obtained by the production method of the present invention:
As shown in FIG. 1, a toilet roll 1 obtained by the manufacturing method of the present invention has a single strip-like thin paper 5 having a smooth surface 2 on one side and a rough surface 3 on the other side. 2 is wound so that it may become the outer peripheral surface 4 of a toilet roll .

A-2. Definition of terms for toilet rolls:
“Thin paper” as used herein is made from raw material such as deinked waste paper pulp (DIP) obtained by deinking hardwood wood, chemical pulp obtained from conifer wood, newspaper waste paper, high quality waste paper, OA waste paper, etc. This refers to sanitary paper for toilets.

  The “one-ply type toilet roll” herein refers to a toilet roll on which one layer of thin paper is wound. The 2-ply-type toilet roll refers to a toilet roll in which two layers of paper, in other words, two sheets of thin paper are wound.

  The “smooth surface of thin paper” as used herein refers to the surface in contact with the cylinder dryer that is smooth and has less fiber fluff among the two front and back surfaces of the thin paper constituting the toilet roll. The “rough surface” of the thin paper refers to the surface opposite to the smooth surface of the two front and back surfaces of the thin paper. In addition, a smooth surface and a rough surface shall be relatively determined from the front and back of the thin paper which comprises one toilet roll.

  The “outer peripheral surface of the roll” here refers to the surface of the paper that appears on the outer periphery of the roll when the paper is wound. Note that the term “roll” is used as a general term for a roll of thin paper unless a word such as “toilet” or “base paper” is attached.

A-3. Action of the toilet rolls:
By making the outer peripheral surface of the roll a smooth surface as described above, the toilet roll can give a smooth hand feeling when handled in a wound state. Further, in the toilet rolls, trouble that the frictional resistance of the roll outer surface is reduced, such as during drawing the tissue paper from the toilet rolls mounted in the packaging during and holder of toilet rolls, such break take time to handle, or thin paper Can be reduced.

The toilet roll can be obtained, for example, by a manufacturing method described in detail below.

B. Manufacturing method of the toilet roll of the present invention:
B-1. Overview of the method for producing the toilet roll of the present invention:
In the method for producing a toilet roll of the present invention, a thin layer is formed from pulp, and then the dehydrated wet paper is pressure-bonded to the outer peripheral surface of the dryer cylinder, the dryer cylinder is heated and the wet cylinder is surrounded from the periphery of the dryer cylinder. Drying the wet paper by blowing hot air on the paper to finish it into one long continuous thin paper whose surface on the side in contact with the dryer cylinder is a smooth surface and the other surface is a rough surface; A base paper winding process for forming a base paper roll on which one thin paper is wound, and after unwinding the thin paper wound on the base paper roll, the single thin paper is wound again so that the smooth surface becomes the outer peripheral surface. And a processing step.

  In addition, the drying process described above is performed by pressing the wet paper onto the outer peripheral surface of the dryer cylinder, heating the dryer cylinder, and blowing hot air from around the dryer cylinder to which the wet paper is pressed to dry the wet paper. This is a process of finishing a thin paper whose surface on the side in contact with is a smooth surface.

  Referring to FIGS. 2 and 3, the outline of the method for producing a toilet roll according to the present invention is a wet paper web formation in which a thin layer of pulp is formed and wet paper is formed by squeezing the thin layer of pulp. Following the steps (performed in wire part 11 in FIG. 2), the dewatering step (performed in press part 12 in FIG. 2) for dehydrating the wet paper following the wet paper forming step, and the wet paper 2 is applied to the outer peripheral surface of the dryer cylinder, the dryer cylinder is heated, hot air is blown from the periphery of the dryer cylinder to the wet paper to dry the wet paper, and the wet paper is turned into a thin paper (in the dryer part 13 in FIG. 2). After the drying step, the base paper winding step (winding the thin paper so that the surface of the thin paper on the side contacting the outer peripheral surface of the dryer cylinder becomes the outer peripheral surface of the base paper roll to form the base paper roll ( 2), the rotation direction is the same as the rotation direction of the base paper roll for unwinding after rotating the base paper roll to unwind the thin paper from the winding. Then, it is possible to make a configuration including a processing step (see FIGS. 3 and 4) for winding one sheet of the thin paper again.

  By the above-described method for producing a toilet roll, a toilet roll 1 having excellent touch feeling and handling in which the outer peripheral surface 4 of the toilet roll 1 is a smooth surface 2 as shown in FIG. 1 can be obtained.

B-2. Description of the method for producing the toilet roll of the present invention:
As long as the manufacturing method of the toilet roll of the present invention uses a drying process, a base paper winding process, and a processing process, which will be described in detail later, materials and processes in a conventionally known toilet roll manufacturing method are applied. Is possible. The following description will be given with reference to FIGS. For names, refer to “Paper and Pulp Technology Handbook, 5th Edition” (edited by the Pulp and Paper Technology Association).

B-2-1. pulp:
Pulp 21 (shown in wire part 11 in FIG. 2) used in the method for producing a toilet roll of the present invention is a main raw material for thin paper, and conventionally known ones also correspond to pulp 21 used in the present invention. Examples thereof include deinked waste paper pulp (DIP) obtained by deinking chemical hardwood, soft pulp obtained from softwood, newspaper waste paper, high quality waste paper, OA waste paper and the like.

B-2-2. Wet paper forming process:
The wet paper forming process generally corresponds to the process performed in the wire part 11 of the paper machine shown in FIG. For the wet paper web forming process used in the present invention, a conventionally known wet paper web process performed in the wire part 11 can be used.

  In the wet paper forming process, the pulp 21 is spread on the mesh-like wire 35 to form a thin layer of pulp, and the moisture in the thin layer of pulp is drawn under the net while being transferred toward the press part 12. The thin layer of pulp is squeezed out. As a result, the wet paper 22 is formed.

  In general, the wire 35 is a ring made of a metal or plastic net, and the pulp 21 is spread on the outer peripheral surface of the wire 35. Wire 35 transports a thin layer of pulp towards press part 12.

  In forming a thin pulp layer, for example, a method of forming a wet paper 22 as a uniform layer by making a pulp slurry mixed with softwood pulp and hardwood pulp, and a softwood pulp layer and a hardwood pulp layer. Any of the methods of forming a single wet paper 22 by combining the papers can be applied. When two layers are combined to form one wet paper 22, a paper is made by a twin-wire type two-layer Yankee paper machine and a hardwood pulp layer and a conifer pulp layer are combined. be able to.

B-2-3. Dehydration process:
The dehydration process generally corresponds to the process performed in the press part 12 of the paper machine shown in FIG. In the dehydration process used in the present invention, a conventionally known process performed in a press part can be used.

  In the press part 12, for example, as shown in FIG. 2, an annular felt 33 is provided. The wet paper 22 transferred from the wire part 11 is attached to the outer peripheral surface of the annular felt 33, and the moisture of the wet paper 22 is removed during this process. Further, the wet paper web 22 is transferred to the next dryer part 13 as the annular felt 33 rotates.

B-2-4. Drying process:
The drying process generally corresponds to the process performed by the dryer part 13 of the paper machine shown in FIG. In the drying process used in the present invention, a thin layer is formed from the pulp, and then the dehydrated wet paper is pressed against the outer peripheral surface of the dryer cylinder to heat the dryer cylinder and to the wet paper from the periphery of the dryer cylinder. The wet paper is dried by blowing hot air to finish the sheet into one long continuous thin paper having a smooth surface on the side in contact with the dryer cylinder and a rough surface on the other surface.

  For example, as shown in FIG. 2, the wet paper web 22 is pressure-bonded to the rotating dryer cylinder outer peripheral surface 32, and in this state, the dryer cylinder 31 and the wet paper web 22 both rotate about 1/2 to 2/3. The thin paper 5 may be transferred to the next part (calendar part 14 in FIG. 2). During this time, the wet paper web 22 is heated by the steam sent to the inside of the dryer cylinder 31, and at the same time, the dryer cylinder from the spray port opened toward the dryer cylinder 31 by the hood 36 that covers the periphery of the dryer cylinder 31. Drying is performed by blowing hot air toward the wet paper 22 pressure-bonded to the outer peripheral surface 32.

  Further, the wet paper 22 is pressed against the outer peripheral surface 32 of the dryer cylinder by pressing the wet paper 22 together with the felt 33 toward the dryer cylinder 31.

  By making the dryer cylinder outer peripheral surface 32 a smooth surface made of a hard material, the cylinder contact surface 6 of the paper becomes the smooth surface 2 with less fiber fluffing compared to the surface on the opposite side of the paper. Thus, a long continuous thin paper 5 can be finished.

  Of the two front and back surfaces of paper (wet paper 22 or thin paper 5 in this specification), the surface of the paper that contacts the dryer cylinder outer peripheral surface 32 in the drying process is referred to as “cylinder contact” in this specification. I will say "face".

  The paper that has undergone the above drying process is generally the same as the paper machine shown in FIG. 2, with the calendar part 14, smoothing the surface of the paper, densifying the structure, and making the paper thickness uniform. You may go according to.

B-2-5. Raw paper winding process:
The base paper winding process is performed by the reel part 15 of FIG. 2, and the thin paper 5 finished through the above-described processes is wound, whereby the base paper roll 23 is produced. At this time, the thin paper 5 is wound so that the cylinder contact surface 6 of the thin paper 5 becomes the outer peripheral surface 4 of the base paper roll 23.

  In the base paper winding process, a method of winding the thin paper 5 while rotating the base paper roll 23 is usually used. As a specific example, the longitudinal direction of the core of the base paper roll 23 is held perpendicularly to the direction in which the thin paper 5 is transported, and the core outer surface of the base paper roll 23 is brought into contact with the thin paper 5 to contact the core of the base paper roll 23. After the thin paper 5 is attached, the thin paper 5 is continuously wound up by rotating in the direction in which the smooth surface 2 (cylinder contact surface 6) of the thin paper 5 becomes the outer peripheral surface 4 of the base paper roll 23. In the case of FIG. 2 in which the thin paper 5 is transferred from right to left with the smooth surface 2 (cylinder contact surface 6) of the thin paper 5 facing downward, the thin paper 5 is wound while the core of the base paper roll 23 is rotated clockwise. It is done.

B-2-6. Processing process:
The processing step is performed using, for example, an apparatus as shown in FIG. As shown in FIG. 4, the base paper roll 23 whose outer peripheral surface 4 is the smooth surface 2 is rotated to unwind, and one sheet (one layer) of continuous thin paper 5 unwound from the winding. Is wound again so that the outer peripheral surface 4 becomes the smooth surface 2, so that a rod-shaped winding paper, so-called log 24, which is the basis of the finished toilet roll 1 is produced.

  A specific example of the processing step when the outer peripheral surface 4 of the base paper roll 23 is the smooth surface 2 of the thin paper 5 will be described below with reference to FIGS.

  The base paper roll 23 is disposed in contact with the outer peripheral surface of an annular feeding belt 54 that is hung on the feeding belt drive roll 41 and the like. As shown in FIG. 3, the annular feeding belt 54 is rotated so that the base paper roll 23 in contact with the annular feeding belt 54 is rotated to unwind the thin paper 5.

  As shown in FIG. 3, the thin paper 5 unwound from the winding of the base paper roll 23 is continuously transferred to the turret 52 while being laid on the outer periphery of the roll member while maintaining an appropriate tension.

  Further, in order to emboss the thin paper 5, both sides of the thin paper 5 may be narrowed with an embossing roll 53 in the middle.

  In the turret 52, the log 24 is formed by winding the thin paper 5 that has been transferred. By rotating the rider roll 51 by bringing the outer peripheral surface of the rider roll 51 into contact with the core of the log 24 or the outer peripheral surface 4 of the log 24 in the middle of winding, the log 24 for winding the thin paper 5 is rotated. .

  The rotation direction of the rider roll 51 is adjusted so that the winding rotation occurs so that the smooth surface 2 (cylinder contact surface 6) of the thin paper 5 becomes the outer peripheral surface 4 of the log 24.

  As a final step, the front end of the wound thin paper 5 is bonded to the outer peripheral surface 4 of the log 24 by gluing, and then the log 24 is cut to a desired width (not shown), whereby the toilet roll 1 is Complete.

  From the above, the toilet roll 1 in which the thin paper 5 is wound so that the cylinder contact surface 6 of the thin paper 5 becomes the outer peripheral surface 4 of the toilet roll 1 is obtained. That is, the toilet roll 1 in which the smooth surface 2 of the thin paper 5 with less fiber fluff becomes the outer peripheral surface 4 of the toilet roll 1 is obtained by the method for manufacturing a toilet roll of the present invention.

The present invention relates to a method for producing a toilet roll , which can obtain a toilet roll excellent in smooth feel and handling in a wound state.

It is a perspective view of the toilet roll obtained by the manufacturing method of this invention , and is a figure which shows the state which unwinded the front-end | tip part . It is the figure showing the outline | summary of one specific example of the manufacturing process of the base paper of the toilet roll obtained by the manufacturing method of this invention. It is a figure showing one specific example of the processing process in the manufacturing method of the present invention. It is a figure showing the relationship between the unwinding of the base paper roll in the manufacturing method of this invention , and the winding of a log.

Explanation of symbols

1: toilet roll, 2: smooth surface, 3: rough surface, 4: outer peripheral surface, 5: thin paper, 6: cylinder contact surface, 11: wire part, 12: press part, 13: dryer part, 14: calendar part, 15: reel part, 21: pulp, 22: wet paper, 23: base paper roll, 24: log, 31: dryer cylinder, 32: dryer cylinder outer surface, 33: felt, 35: wire, 36: hood, 41: feeding Belt drive roll, 50: bet roll, 51: rider roll, 52: turret, 53: embossing roll, 54: feeding belt.

Claims (1)

A thin layer is formed from the pulp, and then the dehydrated wet paper is pressed against the outer peripheral surface of the dryer cylinder, the dryer cylinder is heated, and hot air is blown from the periphery of the dryer cylinder to the wet paper to remove the wet paper. A drying step of finishing the sheet into one long continuous thin paper having a smooth surface on the side in contact with the dryer cylinder and a rough surface on the other side by drying,
A base paper winding step for forming a base paper roll on which one piece of the thin paper is wound;
After unwinding the thin paper wound on the base paper roll, the smooth surface of one thin paper is taken as the outer peripheral surface by winding the thin paper again so that the smooth surface becomes the outer peripheral surface. Forming a log, cutting the log into a predetermined width, and obtaining a toilet roll having the smooth surface of one sheet of thin paper as an outer peripheral surface ;
The manufacturing method of the toilet roll which has.

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