JP7110622B2 - Embossing equipment for tissue paper - Google Patents

Description

The present invention relates to embossed tissue paper and an embossing device therefor.

Tissue paper (toilet paper, tissue paper, hand towels, kitchen paper, etc.) is often embossed and given various patterns, etc., and thin paper that is used in a state where multiple sheets are stacked has also become popular. ing.

For example, when a sanitary thin paper roll (so-called toilet paper) wound in a roll shape is made into a two-ply two-ply (so-called double type), it is squeezed by sandwiching it between a pair of rolls in a stacked state. It is often used to suppress peeling by squeezing (see Patent Literature 1).

For sanitary thin paper (toilet paper, tissue paper, hand towels, kitchen paper, etc.), in order to make effective use of the flexibility of the thin paper itself, embossing is done only on the sides (ends in the axial direction) and edge embossing is applied. formation is taking place.

JP 2009-240722 A

However, in such an embossing apparatus for thin paper, an embossed shape for compression molding is formed on the outer peripheral surface of one of the pair of rolls that sandwich the thin paper, and the outer peripheral surface of the other roll is It may be formed into a flat cylindrical surface that receives the embossed shape. In this embossing device, since the embossed shape of one roll is pressed against the outer peripheral surface of the other roll with a desired contact pressure, the embossing device is subject to wear due to long-term use, for example.

In particular, the embossed pattern that is press-formed on thin paper is a pattern that is continuous in the direction of rotation of the roll, so there is a difference in the amount of wear in the axial direction, and part of the deterioration shortens the service life. There was a problem that

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a thin paper and an embossing apparatus which are advantageous in embossing by realizing a pattern that can extend the service life of a pair of rolls for embossing the thin paper.

One aspect of the thin paper invention that solves the above problems is that the embossed shape formed on the outer peripheral surface of one roll of the pair of rolls is compressed while being sandwiched between a pair of rotating rolls and sent out. By pressing the thin paper having an embossed pattern of a predetermined width extending in the feeding direction of the roll pair, the embossed shape is compressed in a direction inclined with respect to the side in the feeding direction of the roll pair. The embossed pattern is formed continuously or intermittently by molding.

One aspect of the invention of an embossing device for thin paper that solves the above problems is provided with a roll pair that presses and forms an embossed shape on the thin paper by rotating while sandwiching the thin paper, and the roll pair includes one roll. An embossing device for thin paper in which the embossed shape protruding from the outer peripheral surface of the roll is formed and is installed in a state of being pressed against the flat outer peripheral surface of the other roll, wherein the embossing device is formed on the outer peripheral surface of the one roll The embossed shape forms an embossed pattern with a predetermined width that extends in the feeding direction of the thin paper, and the compression molding position by the embossed shape is continuous without interruption or intermittently continuous. and the continuous pattern is formed in a shape continuous in a direction inclined with respect to the circumferential direction orthogonal to the rotation axis of the roll.

Thus, according to one aspect of the present invention, it is possible to realize a pattern capable of extending the service life of a pair of rolls for embossing thin paper, and to provide thin paper advantageous for embossing and an embossing apparatus for the same. can be done.

FIG. 1 is a diagram showing thin paper according to one embodiment of the present invention, and is a perspective view showing the overall configuration thereof. FIG. 2 is a plan view illustrating the shape of wide base paper before being cut into rolls of thin paper. FIG. 3 is a layout diagram showing a schematic configuration of an embossing device for embossing the base paper of FIG. FIG. 4 is a plan view showing an embossing portion in an embossing roll of the embossing device. FIG. 5 is a vertical cross-sectional view taken along the line VV in FIG. 4, illustrating the convex portion (embossed shape) of the embossed portion. FIG. 6 is an explanatory conceptual diagram illustrating a problem in the conventional form in the embossed portion. FIG. 7 is a layout diagram showing a schematic configuration of an embossing device showing another aspect.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 5 are diagrams showing a thin paper and an embossing apparatus for the thin paper according to one embodiment of the present invention.

In FIG. 1, the thin paper 10 is, for example, a so-called two-ply form in which two sheets of single paper 10A and 10B are stacked, and is manufactured as sanitary toilet paper in a state in which the strip-shaped continuous paper is rolled into a roll. ing. The thin paper 10 is formed with a pair of edge embossments E extending with a predetermined width W narrower than the roll width Rw in the vicinity of both sides 10s of the axial ends of the roll. In this thin paper 10, the single sheets 10A and 10B are press-joined so that the edge emboss E maintains the two-ply state (suppresses peeling).

Here, in the present embodiment, a sanitary toilet paper made of thin paper 10 in which two sheets of single paper 10A and 10B are stacked in two plies and rolled into a roll will be described as an example, but the present invention is not limited to this. . For example, the thin paper may be a stack of three or more sheets, a cut type that is cut into a desired area and folded, or tissue paper or kitchen paper other than toilet paper. Further, the edge embossing of the thin paper is not limited to the form of the narrow width W extending in the vicinity of both sides 10s. may

As shown in FIG. 2, this thin paper 10 is a base paper 1 obtained by stacking two sheets of single paper 1A and 1B each having a width corresponding to a plurality of pieces before being cut into individual rolls using an embossing apparatus 100 shown in FIG. , a plurality of pairs of edge embossments E are formed. The embossing apparatus 100 produces a base paper 1 that maintains a two-ply stack by performing pressure joining for continuously forming a plurality of edge embossments E on the single sheets 1A and 1B in a state of being superimposed.

As shown in FIG. 3, the embossing device 100 sandwiches the stacked single sheets 1A and 1B sent from the upstream side between a pair of rotating embossing rolls 101 and a receiving roll 106, thereby forming a plurality of single sheets. The edge embossing E is compressed and sent to the downstream side as a compressed and spliced base paper 1.例文帳に追加

In the embossing device 100, two feed roll pairs 111A, 111B, 112A and 112B are arranged upstream of the roll pairs 101 and 106 for embossing. These feeding roll pairs 111A, 111B, 112A, and 112B pull out the single sheets 1A and 1B from original rolls (not shown), respectively, and pass them through guide rolls 115 and 116 between the pair of embossing rolls 101 and receiving rolls 106. send out and supply. The feed rolls 111A and 112A are driven to rotate, and the feed rolls 111B and 112B are driven to rotate while being in pressure contact with each other, thereby feeding the single sheets of paper 1A and 1B to be sandwiched downstream. Further, the guide rolls 115 and 116 press against one side of the single sheets 1A and 1B fed from the feed roll pairs 111A, 111B, 112A and 112B and are driven to rotate, thereby stabilizing the path of the single sheets 1A and 1B. between roll pairs 101 and 106 for embossing.

In this embossing apparatus 100, an embossing portion 102 extending in the circumferential direction is installed on the outer peripheral surface of an embossing roll 101 corresponding to the formation position of the edge embossing E of the base paper 1 (see FIG. 2). In addition, the embossing apparatus 100 has a replaceable rubber coating layer 107 on the outer peripheral surface of a receiving roll 106 with which the embossed portion 102 on the outer peripheral surface of the embossing roll 101 is pressed. For this reason, the embossing roll 101 and the receiving roll 106 are arranged such that the later-described convex portions 103 of the embossed portion 102 are pushed into the rubber coating layer 107, and the base paper 1 (single papers 1A and 1B) is sandwiched between them. The edge embossing E is formed by compression molding.

As shown in FIG. 4, the embossing portion 102 of the embossing roll 101 has convex portions 103 arranged as individual embossing shapes for pressing edge embossing E on the base paper 1 (thin paper 10). The convex portions 103 of the embossed portion 102 are formed in the shape of a truncated quadrangular pyramid positioned between the grid-shaped flat portions 104. As shown in FIG. They are arranged at spaced apart positions, and the top surface 103t is located in the center surrounded by the slopes 103s in the shape of a truncated quadrangular pyramid. The embossed portions 102 of the embossing roll 101 are aligned (in series) with the convex portions 103 in the circumferential direction of the outer peripheral surface of the roll orthogonal to the rotating shaft 101d, in other words, in the feeding direction D1 of the base paper 1 (see FIG. 2). The direction D2 is formed so as to intersect at an inclination angle Sd of 25 degrees (15 degrees to 35 degrees may be acceptable). That is, in the embossed portion 102 of the embossing roll 101, the convex portions 103 are continuous at regular intervals, and the continuous direction of the convex portions 103 is relative to the circumferential direction orthogonal to the rotation axis 101d of the embossing roll 101. , the inclination angle Sd is 25 degrees.

As a result, the edge embossing E formed on the thin paper 10 (base paper 1) has a predetermined narrow width W in the feed direction D1 of the base paper 1 by compression molding of the embossed portion 102 extending in the circumferential direction of the embossing roll 101. is formed in an embossed pattern extending at The embossed pattern is concave in a direction inclined with respect to the feeding direction D1 of the base paper 1 because the convex portions 103 of the embossed portion 102 of the embossing roll 101 continue in a direction inclined with respect to the circumferential direction. The concave portions e are formed in a continuous pattern in which they are arranged at equal intervals (intermittently).

At this time, the convex portions 103 continuous in a direction inclined with respect to the circumferential direction of the embossing roll 101 are pushed into the rubber coating layer 107 of the receiving roll 106 together with the base paper 1, and the concave portions e of the edge embossing E are pressed. However, as the pair of rolls 101 and 106 rotate relative to each other, the compression molding position by the convex portion 103 (embossed shape) shifts in the rotation axis direction. For this reason, unlike the conventional case shown in FIG. It is possible to prevent the compression-deformed portions of the rubber coating layer 107 of the receiving roll 106 from continuing at the same axial location when the rollers 106 are pressed against each other.

As described above, in the thin paper 10 of the present embodiment, the embossed pattern (continuous pattern) of the concave portions e that are continuous at regular intervals and inclined at the inclination angle Sd of 25 degrees with respect to the side 10s of the axial end portion is compression molded. ing. As a result, the embossing apparatus 100 for compressing the embossed pattern shifts the compression molding position in which the convex portion 103 of the embossing roll 101 is pressed into the rubber coating layer 107 of the receiving roll 106 in the axial direction, and the base paper 1 (thin paper 10) is shifted in the axial direction. ) can be embossed.

Therefore, the embossing device 100 can axially shift the compressive deformation location where the protrusion 103 of the embossing roll 101 is pushed into the rubber coating layer 107 of the receiving roll 106 along with the relative rotation. For this reason, it is possible to avoid repeated deformation of the rubber coating layer 107 at the same location in the axial direction, and it is possible to disperse the deterioration due to wear and extend the usage limit (service life). .

As a result, the edge-embossed thin paper 10 (base paper 1) capable of extending the service life of the receiving roll 106 for embossing can be realized, and the embossing apparatus 100 for executing the embossing can be provided.

Here, the edge embossing E of the thin paper 10 (base paper 1) is not limited to a form that extends near both sides 10s and that the concave portions e continue at regular intervals within the range of the narrow width W. do not have. For example, narrow embossments (concave shapes) continuous with a predetermined length may be formed in a pattern in which left and right are alternately intermittent.

In addition, the embossed shape for compressing edge embossing of thin paper is not limited to a form in which the truncated quadrangular pyramid-shaped convex portions 103 are continuously arranged at the spaced positions between the grid-like flat portions 104 . . For example, the protruding convex shape may be continuous such as linearly or curvedly. Alternatively, the unevenness of the embossed portion 102 may be reversed to form an embossed shape in which protrusions protruding in a grid pattern and individual recesses recessed in the grid pattern are arranged.

For example, the case where the rubber coating layer 107 is provided on the outer peripheral surface of the backing roll will be described as an example, but the present invention is not limited to this. For example, the embossed pattern may be pressed onto the thin paper 10 by omitting the rubber coating on the surface and placing the convex portion 103 of the embossing roll 101 against the steel surface with the base paper 1 sandwiched therebetween. Also in this case, similarly to the above-described embodiment, it is possible to reduce deterioration caused by abrasion due to the embossing process and extend the service life.

Further, in the above-described embodiment, the case of using the embossing apparatus 100 that employs the pair of rolls 101 and 106 having the same diameter is described as an example, but the present invention is not limited to this. For example, as shown in FIG. 7, by making the embossing roll 101 and the backing roll 106 have different outer diameters, it is possible to shift the pressed portion in the axial direction and also in the circumferential direction along with the relative rotation. , it is possible to avoid synchronous press-contacting of the same portion for each circumference. In this case, longer service life can be expected than in the above embodiment.

The height of the convex portion 103 of the embossed portion 102 can be 0.1 mm to 2.0 mm, preferably 0.1 mm to 0.5 mm, more preferably 0.2 mm to 0.5 mm, and 0.1 mm to 0.5 mm. 2 mm to 0.495 mm is particularly preferred. By setting it as the said range, abrasion of the receiving roll 106 can be reduced.

The scope of the invention is not limited to the illustrated and described exemplary embodiments, but also includes all embodiments that provide equivalent results for which the invention is intended. Furthermore, the scope of the invention is not limited to the combination of inventive features defined by each claim, but may be defined by any desired combination of the particular features of each of the disclosed features. .

Reference Signs List 1 Base paper 1A, 1B Single paper 10 Thin paper 10A, 10B Single paper 10s Side 100 Embossing device 101 Embossing roll 101d Rotary shaft 102 Embossing unit 103 ……Convex part 106……Receiving roll 107……Rubber coating layer E……Embossed edge e……Concave part Sd……Inclination angle W……Predetermined width

Claims (2)

A pair of rolls for compressing and forming an embossed shape on the thin paper by sandwiching and rotating the thin paper is provided. An embossing device for thin paper installed in a state of being pressed against the outer peripheral surface,
The embossed shape formed on the outer peripheral surface of the one roll forms an embossed pattern with a predetermined width extending in the delivery direction of the thin paper, and the compression molding positions by the embossed shape are continuous without interruption. A continuous pattern is formed by forming a continuous pattern in a shape that is continuous in a direction inclined with respect to the circumferential direction perpendicular to the rotation axis of the roll ,
Each of the embossed shapes is arranged at a spaced position in which the convex portions of the convex shape sandwich the flat portion between them without interruption, and the height of the convex portion is formed to be 0.1 mm to 2.0 mm. has been
By making the outer diameters of the outer peripheral surfaces of the roll pairs different, the portion where the embossed shape on the outer peripheral surface of the one roll is in pressure contact with the outer peripheral surface of the other roll is shifted along the relative rotation of the roll pair. An embossing device for thin paper, characterized in that the embossing device is formed so as to be offset in the circumferential direction of the surface . 2. The thin paper sheet according to claim 1, wherein the continuous direction of the protrusions on the outer peripheral surface of the one roll has an inclination angle of 15 degrees to 35 degrees with respect to the circumferential direction perpendicular to the rotation axis. Embossing device.

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