JP4708451B2 - Sanitary thin paper roll and method for applying edge embossing to continuous sheet used in sanitary thin paper roll - Google Patents

Description

  The present invention relates to a sanitary thin paper roll obtained by winding a continuous sheet in which two or more continuous thin paper sheets continuous in a strip shape are wound into a cylindrical shape, and two or more continuous thin paper sheets that are continuous in a strip shape. The present invention relates to a method for imparting edge embossing to a continuous sheet.

A sanitary thin paper roll typified by a toilet roll is constituted by winding a sheet in which a plurality of strip-like continuous thin papers are laminated and integrated.
An edge embossing technique is generally used for stacking and integrating the above continuous thin paper.
This edge embossing technology provides linear edge embossing to the side edge of a continuous thin paper laminated by a pair of edge embossing rolls composed of a metal roll and a rubber roll narrower than a continuous sheet, This is a technique for integrating laminated thin paper sheets.
JP 2002-227099 A

However, in the conventional edge embossing technology, since the edge embossing is applied in a straight line continuously from a side edge portion of the continuous sheet on which the continuous thin paper is laminated, when wound in a roll shape, As shown in FIG. 9, the protrusions 50, 50 in which the thickness of the embossed portion is thicker than the other portions are formed, and the edge embossing appears clearly on the surface, so that the appearance is poor. It was.
Therefore, the main problem of the present invention is to provide a sanitary thin paper roll that has improved the poor appearance and poor handling properties due to edge embossing while ensuring that unintended delamination does not occur. .

The present invention that has solved the above-described problems and the effects thereof are as follows.
<Invention of Claim 1>
A sanitary thin paper roll in which a continuous sheet obtained by laminating and integrating a plurality of strip-like continuous thin paper sheets by edge embossing constituted by a plurality of unit concave embosses is wound in a cylindrical shape,
The edge embossing is arranged along the longitudinal direction of the continuous sheet at a position spaced from the side edge of the continuous sheet,
The edge embossing has a width of 3 to 10 mm,
Embossing density units concave embossments constituting the edge embossing is a 10 to 30/10 mm ^2, the area of the unit concave embossments are 0.005～0.075Mm ^2, emboss depth of the unit concave embossments is 0.5-2.0 mm,
Hygienic thin paper roll characterized by that.

<Invention of Claim 2>
The sanitary thin paper roll of Claim 1 which has a through-hole in the embossing bottom part of a unit concave embossing.

<Invention of Claim 3>
The sanitary thin paper roll according to claim 1 or 2, wherein the edge embossing is configured by arranging unit concave embossing at random.

<Invention of Claim 4>
The sanitary thin paper roll according to any one of claims 1 to 3, wherein the edge embossing is arranged so that the positions thereof are different at predetermined intervals in the longitudinal direction of the continuous sheet.

<Invention of Claim 5>
The sanitary thin paper roll according to any one of claims 1 to 4, wherein the edge embossing is arranged at a predetermined angle so as to intersect the longitudinal direction of the continuous sheet.

<Invention of Claim 6 >
While flowing a continuous sheet laminated with a plurality of strip-shaped continuous thin papers downstream,
For the continuous sheet, by a pair of edge embossing rolls composed of a convex edge embossing roll narrower than the continuous sheet and having an embossing projection on the surface, and a rubber roll paired therewith,
In providing edge embossing to integrate the continuous thin paper,
When the continuous sheet flows for a predetermined length, the position of the edge embossing roll is changed in the width direction of the continuous sheet, and the position in the width direction is changed at every predetermined interval in the longitudinal direction of the continuous sheet. Grant
An edge embossing method for a continuous sheet used for a sanitary thin paper roll.

  As described above, according to the present invention, there is provided a sanitary thin paper roll with improved appearance and poor handling due to edge embossing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Ply structure]
1 to 4, the sanitary thin paper rolls X1 to X4 of this embodiment are formed by winding a continuous sheet 10 in which a plurality of strip-shaped continuous thin papers 11 and 11 are laminated and integrated by edge embossing E into a cylindrical shape. Is.

In the continuous sheet according to the present invention, the number of continuous thin paper sheets to be stacked is not particularly limited. For example, 2 sheets (2 plies), 3 sheets (3 plies), 4 sheets (4 plies), or more And a suitable number of sheets. In particular, when it is used as a toilet roll or kitchen roll, it is usually about 2 to 4 sheets.
Hereinafter, an example in which two continuous thin paper sheets 11 and 11 are stacked will be mainly described in detail.

[Example of edge embossing]
Here, as shown in FIG. 1, the sanitary thin paper roll of the present invention employs linear edge embossing with a width L1 arranged along the longitudinal direction of the continuous sheet at a position spaced from the side edge of the continuous sheet. Form X1 can be made.

  More preferably, as shown in FIGS. 2 and 3, the edge embossing E (e) is an edge embossing whose position differs in the width direction of the continuous sheet 10 at every predetermined interval in the longitudinal direction of the continuous sheet 10. It can be set as forms X2 and X3.

  Note that Example X2 shown in FIG. 2 is an example in which there is no portion to which the edge embossing E is not given only in the longitudinal direction even though it is divided in the width direction of the continuous sheet 10, and Example X3 shown in FIG. This is an example in which the sheet 10 is divided both in the width direction and in the longitudinal direction. Of these examples, the example shown in FIG. 2 is preferred. The longitudinal extension length L2 of one edge embossing divided in these examples is not particularly limited. It can be set to an appropriate length. Moreover, if it is set as the provision form shown by FIG. 3, the division | segmentation space | interval L3 of a longitudinal direction is less than 5 mm.

  Further, as shown in FIG. 4, the sanitary thin paper roll of the present invention can employ an edge embossing in which the edge embossing E is arranged at a predetermined angle α so as to intersect the longitudinal direction of the continuous sheet 10. In this application example, the preferred crossing angle α in the longitudinal direction of the edge embossing and the continuous sheet is 45 degrees or less. Preferably 30 degrees to 45 degrees. If it exceeds 45 degrees, the function as a ply joint becomes insufficient.

  Further, in the case of Example X4 shown in FIG. 4, the edge embossing E can be configured such that the wavy embossed line extends in a certain direction. In this case, the width (height) of the wave Is preferably 3 to 10 mm, particularly 4 to 8 mm. The interval between adjacent emboss lines is preferably 4 to 42 mm, particularly 20 to 35 mm.

[Configuration of edge embossing]
In the sanitary thin paper rolls X1 to X4 of the present invention, the above-described form of edge embossing E can be adopted, but the configuration of the edge embossing E has the following common features.

The feature is that the width L1 of the edge emboss E is in the range of 3 to 10 mm, preferably 4 to 7 mm, and the emboss density of the unit concave emboss e constituting the edge emboss is 10 to 30/10 mm ² .

  By setting the emboss density of the unit concave emboss as the width of the edge emboss E as described above, a sanitary thin paper roll having no protrusions in the conventional example is obtained. Therefore, in the sanitary thin paper roll of the present invention, when a plurality of packages are packaged together, the ridges are not bulky, and the appearance is extremely excellent.

  Moreover, since the edge embossing E and E are distribute | arranged along the longitudinal direction of the continuous sheet 10, there is no possibility that each continuous thin paper 11 will unintentionally peel.

  In this respect, in particular, in the examples X2 and X3 shown in FIGS. 2 and 3, the edge embossing E and E are not easily connected to each other because the edge embossing E is not continuous in the longitudinal direction as compared with the conventional product. Also, there is little risk of unintentional peeling.

Here, the area of the unit concave emboss is desirably 0.005 to 0.075 mm ² . Most preferably, it is 0.01-0.04 mm < ² >. The emboss depth H is preferably 0.5 to 2.0 mm.

The area of the unit concave embossing shown here is extremely small, and the embossing depth is very deep, so that it has a needle hole shape in plan view. In particular, in this embodiment, as shown in FIG. 5, a through hole that penetrates the continuous sanitary thin paper may be formed at the bottom of the unit concave emboss e.
Here, when the area of the unit concave emboss e exceeds 0.075 mm ² , the edge emboss is expressed so as to be remarkably visible on the outer surface of the roll, and the appearance deteriorates. When the area is less than 0.005 mm ² , between the plies of each continuous thin paper The adhesive becomes weak and easy to peel. Further, if the emboss depth is less than 0.5 mm, ply bonding may not be sufficient.

  In addition, in FIG. 1, although the circular thing is shown as the unit concave edge embossing e, not only circular but a rectangle, a rhombus, etc. may be sufficient. The shape of the unit edge embossing is not limited in the present invention. However, a circular shape is preferable.

  If it is a rectangle or rhombus, it has a size of 0.05 to 0.25 mm in the sheet width direction and 0.05 to 0.25 mm in the sheet longitudinal direction. It is good to arrange like this. Preferably, a size of 0.1 to 0.2 mm in each direction is preferable.

  Moreover, about the arrangement | positioning form of the unit concave embossing which comprises edge embossing, it is good to set it as random arrangement | positioning.

[Ply peel strength]
On the other hand, the ply peel strength [cN / 50 mm] in the continuous sheet 10 is preferably 5 to 100 cN / 50 mm. The reason why the lower limit is defined as 5 cN / 50 mm is that when the thickness is less than 5 cN / 50 mm, the base paper sheets S1 and S2 cannot be properly bonded to each other. Moreover, if the upper limit is defined as 100 cN / 50 mm, if it exceeds 100 cN / 50 mm, the sheet tends to be hard and the touch may be deteriorated.

  The ply peel strength is measured according to the tensile test method of JIS P 8113. Among them, it shall be cut into a width of 50 mm in the vertical direction under the standard conditions specified in JIS P8111. After cutting, the sample is peeled in the vertical direction, and the peeled load cell (TG200N, manufactured by Minebea) is fixed to the upper gripping tool and the other to the lower gripping tool. The interval is 8 cm. Next, the film is pulled at a rate of 100 mm / min in the vertical direction and further peeled by 5 cm, and the strength at that time is measured.

[Regarding each continuous thin paper]
Next, each continuous thin paper 11 constituting the continuous sheet 10 according to the present invention will be described.
Each continuous thin paper 11 can be manufactured by making a papermaking raw material mainly made of raw material pulp through a known papermaking process, specifically, a wire part, a press part, a dryer part, a size press, a calendar part, and the like. it can.
In this papermaking, for example, suitable chemicals such as a dispersant, caustic soda, aqueous ammonia and other pH adjusters, antifoaming agents, preservatives, fluorescent dyes, mold release agents, water resistance agents, flow modifiers, yield improvers, etc. Can be added.

  The raw material pulp used for the papermaking raw material is not particularly limited. An appropriate raw material pulp can be selected and used according to the use of the sanitary thin paper roll. Examples of the raw material pulp include wood pulp, non-wood pulp, synthetic pulp, and waste paper pulp. More specifically, ground pulp (GP), stone grand pulp (SGP), refiner ground pulp (RGP), and pressure type Mechanical pulp (MP), chemical mechanical pulp (CGP), semi-chemical pulp (such as ground pulp (PGW), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), bleach chemithermomechanical pulp (BCTMP)) Chemical pulp (SCP), kraft pulp (KP) such as hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), soda pulp (AP), sulfite pulp (SP), dissolved pulp (DP), etc. CP), nylon, rayon, polyester, polyvinyl alcohol Synthetic pulp made from (PVA), deinked pulp (DIP), waste paper pulp such as waist pulp (WP), ground pulp (TP), cotton, flax, hemp, jute, manila hemp, ramie, etc. One or several types can be appropriately selected and used from rag pulp, straw pulp, esparto pulp, bagasse pulp, bamboo pulp, kenaf pulp, and other auxiliary pulps such as bast pulp.

  In particular, if the raw material pulp is toilet paper or tissue paper, a mixture of NBKP and LBKP is preferable. Waste paper pulp may be blended as appropriate, but in terms of texture and the like, it is preferably composed only of NBKP and LBKP. In this case, the blending ratio is NBKP: LBKP = 30: 70 to 50:50. In particular, NBKP: LBKP = 40: 60 is particularly desirable.

  On the other hand, in order to obtain an effect that the continuous thin paper 11 has a high-class feeling as a whole, the ground color is not limited to white, and may be light pink or blue. In this case, it can be achieved by a known technique such as making a papermaking material colored by mixing colorants in advance.

[US tsubo]
On the other hand, the rice paper weight of each continuous thin paper 11 may be adjusted as appropriate depending on the use, but in particular, if it is a toilet roll, the value in the method of measuring rice square weight of JIS P 8124 of each continuous thin paper 11 constituting the continuous sheet. Is preferably 10 to 22 g / m ² . This is because if it is less than 10 g / m ² , it is preferable from the viewpoint of improving the softness of the toilet paper, but the strength of the toilet paper cannot be ensured properly. On the other hand, if it exceeds 22 g / m ² , it becomes too hard to use as toilet paper, resulting in poor touch. The basis weight of each continuous thin paper does not need to be unified. It can be adjusted appropriately.

[Paper thickness]
The paper thickness also depends on the application of the sanitary thin paper roll. If it is a toilet roll, it is preferable that paper thickness shall be 50-300 micrometers. The paper thickness here is not the paper thickness of the continuous thin paper, but the paper thickness of the continuous sheet 10. That is, the paper thickness in the laminated state.

  Further, it is the paper thickness of the non-edge embossed portion here. When the paper thickness is less than 50 μm, it is preferable from the viewpoint of improving softness, but the strength as toilet paper cannot be ensured properly. On the other hand, if it exceeds 300 μm, the toilet paper becomes too hard and the touch of the toilet paper is not only deteriorated, but also a feeling of tingling is generated during use. In addition, it is not necessary to unify all the thicknesses of the sanitary thin paper constituting each layer.

  The paper thickness is measured using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) under the conditions of JIS P8111. Specifically, confirm that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to adjust the zero point, and then Then, raise the plunger and place a sample (eg, toilet paper) on the test table, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed. The paper thickness is an average value obtained by performing measurement 10 times.

  The tensile strength of the sanitary thin paper according to the present invention is determined according to the tensile test method of JIS P 8113. Among them, it is cut into a width of 25 mm in the vertical direction and the horizontal direction under the standard conditions defined in JIS P8111.

[Edge embossing method]
Next, an edge embossing method according to the first structural example described above will be described with reference to FIGS.
In the embossing method according to this example, the continuous sheet 10 is continuously drawn out from the raw roll R on which a continuous sheet in which a plurality of strip-like continuous thin papers are laminated is wound up with appropriate guide rolls G, G. Edge embossing is imparted by arranging a pair of edge embossing rolls 30 and 31 at predetermined positions along the path that flows downstream while guiding.

  As for the formation of the continuous sheet 10, each continuous thin paper is continuously unwound separately from a plurality of continuous thin paper rolls wound with the continuous thin paper, and is laminated and integrated at an appropriate position before the edge embossing roll or at the edge embossing roll. It is good also as a continuous sheet.

The edge embossing rolls 30 and 31 in this example are composed of a convex edge embossing roll 30 that is narrower than the continuous sheet 10 and has an embossing convex part on the surface thereof, and a rubber roll 31 that is paired therewith.
The continuous sheet 10 is passed between the edge embossing rolls 30 and 31 to give edge embossing E (e), and the continuous thin papers 11 are laminated and integrated together.

  Here, in the edge embossing application method of this example, as shown in FIG. 5, for example, along the width direction of the continuous sheet 10, the convex edge embossing rolls 30, 30. By applying edge embossing to the continuous sheet 10 while changing the continuous sheet 10 by some of the plurality of convex edge embossing rolls 30, 30. The width of the continuous sheet 10 is changed.

More specifically, it is possible to select a position where the convex edge embossing rolls 30 or a group of convex edge embossing rolls 30, 30. Each time the continuous sheet 10 flows for a predetermined length, for example, at an appropriate time, a predetermined plurality of convex edge embossing rolls 30 and 30 that are in contact with the continuous sheet are separated from the continuous sheet 10 and at the same time or slightly more than that. All or a part of the predetermined convex edge embossing rolls separated at that time are brought into contact with the continuous sheet 10 as soon as possible.
By doing in this way, the edge embossing E which made the position of the width direction differ is provided for every predetermined space | interval of the longitudinal direction of the continuous sheet 10 shown to FIGS.

  In addition, only the convex edge embossing roll 30 can be arranged with respect to the continuous sheet 10. It is not always necessary to provide a plurality of pairs of rubber rolls. One rubber roll can be configured to face a plurality of convex edge embosses.

  Here, the linear pressure between the pair of edge embossing rolls 30 and 31 is preferably 20 kgf / cm to 100 kgf / cm. If it is less than 20 kgf / cm, the adhesion between the plies of each continuous thin paper becomes weak and it becomes easy to peel off, and if it exceeds 100 kgf / cm, the edge embossing is expressed so as to be noticeable on the outer surface of the roll, and the appearance is deteriorated. Become. Further, when edge embossing is applied to thin paper, tearing may occur.

  Further, the convex edge embossing rolls 30 and 31 may be moved in the width direction of the continuous sheet 10 in a non-contact state, for example. Therefore, it becomes possible to deal with a flexible emboss pattern. If the position of the edge embossing is changed by moving the convex edge embossing roll 30 as described above, it is not always necessary to provide a plurality of convex edge embossing rolls as in the example of FIG. In consideration of the integration and the conveyance speed of the continuous sheet, it is desirable to provide a plurality of sheets.

  On the other hand, the edge embossing shown in FIG. 4 is applied by a single convex edge embossing roll 31 in which convex embossing lines are arranged so as to form a predetermined angle with respect to the continuous sheet conveying direction as shown in FIG. What is necessary is just to give emboss.

It is a figure which shows the 1st example of the edge embossing of this invention. It is a figure which shows the 2nd example of the edge embossing of this invention. It is a figure which shows the 3rd example of the edge embossing of this invention. It is a figure which shows the 4th example of the edge embossing of this invention. It is a figure which shows the example of a cross section of the unit concave embossing concerning this invention. It is a flowchart for demonstrating the method to provide edge embossing to the continuous sheet concerning this invention. It is a schematic top view of the edge embossing roll part of FIG. It is a figure for demonstrating the provision method of the 4th example of edge embossing. It is an example of the sanitary thin paper roll which has the conventional edge embossing.

  DESCRIPTION OF SYMBOLS 10,110 ... Continuous sheet, 11, 111, ... Continuous sanitary thin paper, E ... Edge embossing, e ... Unit concave embossing, R ... Original fabric roll, L1 ... Edge embossing width, L2 ... Edge embossing length, L ... Distance between edge emboss, X1 to X4, X10 ... sanitary thin paper roll.

Claims (6)

A sanitary thin paper roll in which a continuous sheet obtained by laminating and integrating a plurality of strip-like continuous thin paper sheets by edge embossing constituted by a plurality of unit concave embosses is wound in a cylindrical shape,
The edge embossing is arranged along the longitudinal direction of the continuous sheet at a position spaced from the side edge of the continuous sheet,
The edge embossing has a width of 3 to 10 mm,
Embossing density units concave embossments constituting the edge embossing is a 10 to 30/10 mm ^2, the area of the unit concave embossments are 0.005～0.075Mm ^2, emboss depth of the unit concave embossments is 0.5-2.0 mm,
Hygienic thin paper roll characterized by that.   The sanitary thin paper roll of Claim 1 which has a through-hole in the embossing bottom part of a unit concave embossing.   The sanitary thin paper roll according to claim 1 or 2, wherein the edge embossing is configured by arranging unit concave embossing at random.   The sanitary thin paper roll according to any one of claims 1 to 3, wherein the edge embossing is arranged so that the positions thereof are different at predetermined intervals in the longitudinal direction of the continuous sheet.   The sanitary thin paper roll according to any one of claims 1 to 4, wherein the edge embossing is arranged at a predetermined angle so as to intersect the longitudinal direction of the continuous sheet. While flowing a continuous sheet laminated with a plurality of strip-shaped continuous thin papers downstream,
For the continuous sheet, by a pair of edge embossing rolls composed of a convex edge embossing roll narrower than the continuous sheet and having an embossing projection on the surface, and a rubber roll paired therewith,
In providing edge embossing to integrate the continuous thin paper,
When the continuous sheet flows for a predetermined length, the position of the edge embossing roll is changed in the width direction of the continuous sheet, and the position in the width direction is changed at every predetermined interval in the longitudinal direction of the continuous sheet. Grant
An edge embossing method for a continuous sheet used for a sanitary thin paper roll.

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