JP2017154344A - Ply crimp embossing device and method of manufacturing household tissue paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ply crimp embossing device excellent in abrasion resistance of a convexly embossed roll.SOLUTION: A ply crimp embossing device is characterized in that two convex embossing rolls, in which one convex embossing streak 31 formed from a plurality of protrusions on a peripheral surface is arranged along a direction of rotation, abut on one retainer roll 20 in two positions different in the direction of rotation of the retainer roll and in such a manner that the respective convex embossing streaks are away in an axial direction from each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ply pressure bonding embossing device for applying ply pressure bonding embossing to household thin paper.

  2. Description of the Related Art Household thin paper such as tissue paper and toilet paper includes a plurality of ply sheets in which a plurality of base papers are laminated. Some of the multi-ply household thin papers are provided with ply crimping embossing to prevent the separation of each ply.

  This ply crimping embossing is also called edge embossing, knurling, contact embossing, etc., with a plurality of paper sheets used as the base paper for household thin paper laminated, and the peripheral surface is twilled knurled or has many squares Through the convex embossing roll, which is an embossing pattern in which the convex portions are arranged at a constant pitch, and a receiving roll paired with the convex embossing roll, the large number is provided at portions corresponding to both side edges of the household thin paper. It is formed by providing embossing of a pattern corresponding to the convex embossing pattern formed by the convex part or the like.

  A conventional ply pressure-bonding embossing device having a convex embossing roll and a receiving roll for applying ply pressure-bonding embossing is arranged on the convex embossing roll along its circumferential direction (rotation direction) as shown in FIG. The embossed strip formed by collecting a plurality of convex portions is arranged in two strips at intervals in the axial direction. Then, as described above, the laminated sheet in which the continuous sheets serving as the plies of the sanitary thin paper fed from the plurality of raw rolls are laminated between the convex embossing roll and the receiving roll as described above. Then, two ply pressure-bonded embosses are formed, and then the base paper is slit between the two ply pressure-bonded embosses. The formation of the two-ply pressure bonding emboss has the effect of increasing the stability of the subsequent slit.

  However, the conventional ply crimping embossing device has the following problems. First, when accelerating or decelerating the conveying speed of the laminated continuous sheets, tearing or perforation may occur. Secondly, ply peeling due to bouncing, noise, and wear of the convex embossing rolls occur when ply crimping embossing is applied. Third, only one of the two embossed strips may be hit. And it is difficult for these to raise the conveyance speed of a lamination | stacking continuous sheet. In addition, bouncing is a phenomenon in which the convex embossing roll vibrates and does not come into stable contact with the receiving roll, resulting in rattling.

Japanese Patent No. 5331530 Japanese Patent No. 4450421 Japanese Patent No. 5331503 Japanese Patent No. 5573594 Japanese Patent No. 5175625

  Therefore, the main problem of the present invention is that it can improve the problems of the conventional ply crimping embossing device, can speed up the conveyance speed of the laminated continuous sheet when applying ply crimping embossing, and increase the productivity of household thin paper. An object of the present invention is to provide a ply crimping embossing device that can be used.

The present invention that has solved the above problems is as follows.
[Invention of Claim 1]
A ply pressure-bonding embossing device for forming two rows of ply pressure-bonding embosses parallel to the continuous direction of a laminated continuous sheet formed by laminating continuous sheets that are base paper for household thin paper,
Two convex embossing rolls, in which one convex embossing roll formed by a plurality of convex portions on the circumferential surface is arranged along the rotation direction, two locations where the receiving roll has different rotation directions. A ply pressure-bonding embossing device, wherein the convex embossing strips are in contact with each other at a position spaced apart in the axial direction.

[Invention of Claim 2]
The ply pressure-bonding embossing device according to claim 1, wherein the convex embossing roll has a diameter of 280 to 320 mm.

[Invention of Claim 3]
The ply pressure-bonding embossing device according to claim 1 or 2, wherein the convex embossing roll is lightened by a thinning process.

[Invention of Claim 4]
The arrangement pattern of the protrusions arranged on the peripheral surface of the convex embossing roll has at least one top of the convexity or a part of the top of the convexity in the axial direction at each position in the rotation direction. The ply pressure-bonding embossing device according to any one of claims 1 to 3, wherein the top portion of the portion and the receiving roll are always in contact with each other.

[Invention of Claim 5]
The ply pressure-bonding embossing device according to any one of claims 1 to 4, wherein each convex embossing roll is pressed against the receiving roll by a cylinder device.

  According to the present invention as described above, the problems of the conventional ply crimping embossing device can be improved, the conveying speed of the laminated continuous sheet at the time of ply crimping embossing can be increased, and the productivity of household thin paper can be increased. A ply crimp embossing device is provided.

It is the top view seen from the lower part for demonstrating the ply crimping | compression-bonding embossing apparatus which concerns on this invention. It is a side view for demonstrating the ply pressure bonding embossing apparatus which concerns on this invention. It is a side view for demonstrating the effect of the ply crimping | embossing apparatus which concerns on this invention. It is a figure which shows the convex embossing pattern of embodiment of this invention. It is a figure which shows the example of the convex embossing pattern of 2nd embodiment of this invention. It is the top view seen from the lower part for demonstrating the conventional ply crimping | compression-bonding embossing apparatus. It is a figure for demonstrating the testing method of ply peeling prevention property. It is a figure for demonstrating the ply pressure bonding embossing apparatus which has a cylinder apparatus which concerns on this invention. It is the figure which looked at the ply crimping | embossing embossing apparatus which has a cylinder apparatus based on this invention from the receiving roll side.

An embodiment of the present invention will be described in detail with reference to FIGS.
The ply pressure bonding embossing device 1 according to the present embodiment has two pairs of convex embossing rolls 10A and 10B and a receiving roll 20 as shown in FIGS. 1 and 2, and each convex embossing roll 10A and 10B. Are arranged so that the circumferential surfaces thereof are in contact with the receiving roll 20 with the axial direction thereof aligned. In addition, in the top view shown in FIG. 1, two pairs of convex embossing roll 10A, 10B has shown the aspect which shares the receiving roll 20 with two or more.

  The convex embossing rolls 10A, 10B have a plurality of convex portions 30, 30... Arranged in a predetermined pattern corresponding to the pattern of the ply crimping emboss 3 on the peripheral surface, and the plurality of convex portions 30, 30. A single convex embossed strip 31 is formed along the direction. The single convex embossed strip in the present invention does not mean that the convex portions are in a line. It means that a set group composed of a plurality of convex portions forms one row as a whole.

  The ply pressure-bonding embossing device 1 according to the present invention is configured such that when a laminated continuous sheet 2 in which a continuous sheet that is a base paper of tissue paper or toilet paper is passed between the convex embossing rolls 10A and 10B and the receiving roll 20 is passed. The convex portions 30, 30,... Of the convex embossing rolls 10A, 10B are in pressure contact with the laminated continuous sheet 2, whereby the laminated continuous sheet 2 is ply-bonded.

  In the ply pressure-bonding embossing device 1 of the present invention, two convex embossing rolls 10A and 10B having a single convex embossing strip are convexly embossed in the axial direction at two positions where the rotational direction of one receiving roll 20 is different. 31 and 31 are in contact with each other so as to be separated from each other. Therefore, the laminated continuous sheet 2 first passes between the convex embossing roll 10A located on the upstream side in the conveying direction and the receiving roll, and then between the convex embossing roll 10B located on the downstream side in the conveying direction and the receiving roll. Pass through. The ply pressure-bonding embossing device 1 of the present invention is passed through the convex embossing rolls 10A, 10B and the receiving roll in this way, so that two rows of ply pressure-bonding embossing 3, 3 are provided.

  Each of the convex embossing rolls 10A and 10B can be independently installed on a frame or the like by a fixing means having a known bearing portion such as a cantilever arm or a both-end arm or a clamp. The laminated continuous sheet 2 provided with two rows of ply pressure bonding embosses 3 and 3 is then slit or cut between the two rows of ply pressure bonding embosses 3 and 3 so that tissue paper or toilet paper is provided. (FIG. 1, slits and cutting positions are indicated by symbol A).

  Advantages of the ply pressure bonding embossing device 1 of the present invention over the conventional example will be described. First, as shown in FIG. 6, two convex embossed strips 131, 131 are formed on one convex embossed roll 110, and each convex embossed strip 131, 131 of this one convex embossed roll 110 is the rotational direction of one receiving roll 120. In the conventional ply pressure bonding embossing device (hereinafter also referred to as a conventional device) 101 that contacts at the same position, two convex embossing strips 131 are formed at the time of ply pressure bonding when the laminated continuous sheet 102 passes between the convex embossing roll 110 and the receiving roll 120. , 131 often do not contact the paper surface ideally at the same time. This is because the continuous sheet, which is a base paper used as a thin paper for home use, has a fine crepe, is thin and has a low density and is easy to corrugate during transportation, and the surface is not as smooth as metal, and the convex embossed strip 131 is worn. by. When the two convex embossed strips 131 and 131 do not contact the paper surface ideally at the same time as described above, particularly, the laminated continuous sheet 102 is wrinkled between the two convex embossed strips 131 and 131. If the laminated continuous sheet 102 is excessively loaded, tearing occurs. Such a phenomenon is likely to occur when the conveyance speed of the laminated continuous sheet 102 is changed, that is, when the conveyance speed of the laminated continuous sheet is accelerated or decelerated.

  On the other hand, in the ply pressure bonding embossing device 1 according to the present invention shown in FIG. 1, the two convex embossing rolls 10 </ b> A and 10 </ b> B are in contact with each other at two different positions in the rotational direction of the single receiving roll 20. The sheet 2 passes between the convex embossing rolls 10A and 10B having only one convex embossing strip 31 and the receiving roll 20 twice with a time difference, so that two rows of ply crimping embossing 3 and 3 are given. Therefore, when the laminated continuous sheet 2 passes the laminated embossing rolls 10A and 10B and the receiving roll 20 through the laminated continuous sheet 2 and ply pressure-bonds, there is room for wrinkles to escape in a wide range in the paper width direction. The wrinkles and tears do not occur as in the conventional device 101.

  Further, in the ply crimping embossing device, the convex embossing strip is composed of a plurality of convex portions, so that the convex portion is always worn, and as described above, the laminated continuous sheet to be subjected to the ply crimping embossing Due to characteristics and the like, the convex embossed strip on the peripheral surface often wears unevenly without being evenly worn. In the conventional apparatus 101, when one convex embossed strip 131 of the two convex embossed strips 131 and 131 is worn, the one convex embossed strip 131 does not contact the paper surface. The convex embossed strip 131 may not contact the paper surface. In addition, when wear occurs on one convex embossing strip 131, the entire convex embossing roll needs to be replaced even if the other convex embossing strip 131 is not worn.

  On the other hand, in the ply crimping embossing device 1 according to the present invention, since only one convex embossing strip 31 is arranged on the convex embossing rolls 10A and 10B, only one convex embossing strip 131 like the conventional device 101 is provided. Problems due to wear cannot occur, and even when the respective convex embossing strips 31 and 31 for providing two rows of ply crimping embossing are worn, it is possible to replace the convex embossing rolls 10A and 10B. .

  Here, in the ply pressure bonding embossing device 1 according to the present invention, it is desirable that the distance L1 between the two convex embossing rolls 10A and 10B, particularly the axial direction of each convex embossing strip 31, is 10 to 35 mm. The phenomenon of ply peeling in household thin paper such as toilet paper and tissue paper usually arises from the edge of household thin paper. Therefore, the ply pressure-bonding emboss 3 is formed on the edge of household thin paper in order to enhance the prevention of ply peeling. Usually, it is arranged within 15 mm from the edge. As described above, according to a conventional method for manufacturing household thin paper, slits and cutting are performed at A between two rows of ply crimping embossing 3 and 3 formed by the ply crimping embossing device 1, and the slit position and cutting are performed. Since the position A becomes the edge of the household thin paper, in the ply crimping embossing device 1 according to the present invention, it is desirable that the axial separation distance L1 of the convex embossed strips 31, 31 is 35 mm or less. On the other hand, when the separation distance L1 is excessively narrow to less than 10 mm, it becomes difficult to slit or cut. Furthermore, since the distance between the ply pressure-bonding emboss 31 by the second convex embossing roll 10B and the ply pressure-bonding emboss 31 in the first convex embossing roll 10A applied in advance is reduced, the risk of wrinkles is increased. In addition, the installation space becomes difficult.

  The separation distance (separation distance between the contact positions of the receiving rolls 20) L2 between the two convex embossing rolls 10A and 10B in the ply pressure bonding embossing device 1 according to the present invention is preferably 230 to 325 mm. Conventionally, the conveyance speed of a general laminated continuous sheet is about 600 to 1200 m / min, and when the distance L2 between the two convex embossing rolls 10A and 10B is less than 230 mm, the book is given in two steps with a time difference. The advantage of the time difference of the ply pressure-bonding embossing device 1 that is characteristic of the invention is difficult to be expressed. In particular, when the separation distance L2 is used, the laminated continuous sheet can be accelerated more than the conventional conveyance speed. On the other hand, in order for the sheet conveying speed to exceed 1200 m / min, it is necessary to increase the diameter of the receiving roll 20, which causes a space problem. In particular, in a ply machine or an interfolder in which the ply pressure bonding embossing device 1 or the ply pressure bonding embossing device is installed, the convex embossing roll is originally configured to be replaceable due to wear, but the receiving roll is configured to convey the sheet. Since most of them also serve as a transport roll that forms a path, replacement is difficult. Therefore, since the enlargement of the diameter of the receiving roll often requires a significant modification of existing equipment, it is difficult to increase the diameter of the receiving roll in the field of household thin paper manufacturing.

  On the other hand, the ply crimping embossing device 1 according to the present invention does not have the two convex embossing strips 131 unlike the convex embossing roll 110 of the conventional device 101, and therefore the thickness (axial thickness) of the convex embossing rolls 10A and 10B is thin. This can reduce the weight. Furthermore, since the weight and the contact position of the two convex embossing rolls 10A and 10B with respect to the receiving roll 20 are different in the rotation direction, there is a margin in the installation space. As a result, the diameters of the convex embossing rolls 10A and 10B can be increased. Specifically, the diameter of the conventional convex embossing roll 110 is approximately 240 to 260 mm. In the ply pressure bonding embossing device 1 according to the present invention, the diameters of the convex embossing rolls 10A and 10B are 280 to 320 mm, the receiving roll. It is possible to easily enlarge the diameter up to 60 to 90%.

  Since the convex embossing roll in the ply pressure bonding embossing device 1 does not have a drive source for rotating the convex embossing roll, the followability of the laminated continuous sheet 2 to the paper surface, particularly the laminated continuous sheet, is reduced when the weight is reduced. 2, the followability at the time of acceleration / deceleration is greatly improved, the ply crimping emboss 3 is appropriately applied, and tears and perforations are reduced. Moreover, the expansion of the diameter of the convex embossing rolls 10 </ b> A and 10 </ b> B results in an increase in the circumferential length, and the wear resistance of the convex portion 30 constituting the convex embossing strip 31 is improved. Further, particularly, as shown in FIG. 2, when the diameters of the convex embossing rolls 10A and 10B are enlarged, the edges 30E of the convex portions 30 given to the peripheral surfaces of the convex embossing rolls 10A and 10B are microscopically laminated continuous sheets. The angle (接触 A in the figure) at the time of contact with the paper surface (receiving roll peripheral surface) of 2 becomes small, so that the laminated continuous sheet 2 is less likely to be wrinkled or perforated. Such an effect is obtained by using the embossing rolls 10A and 10B that are particularly embossed in the basis weight and thickness of a known general household thin paper, particularly when the ply pressure bonding embossing is applied at a linear pressure necessary to prevent ply peeling. When the diameter exceeds 280 mm, it becomes remarkable. In addition, when the diameter of the convex embossing rolls 10A and 10B exceeds 320 mm, it becomes difficult in terms of equipment installation.

  Furthermore, in the ply pressure-bonding embossing device 1 of the present invention, the convex embossing rolls 10A and 10B can be increased in diameter and thinned, so that it is possible to reduce the weight by the thinning process. It is desirable to reduce the weight. In particular, the conventional apparatus 101 has two convex embossed strips 131 and 131, and since the convex embossing roll 110 has a thickness, it is difficult to perform the thinning process accurately in the axial direction. In the ply crimping embossing device 1 according to the present invention, the convex embossing rolls 10A and 10B can be increased in diameter, and the thickness can be reduced, so that the thinning process can be performed with high accuracy. Further reduction in weight is achieved by the blanking process, and the followability to the paper surface (receiving roll peripheral surface) of the laminated continuous sheet 2 at the time of acceleration / deceleration of the laminated continuous sheet 2 is increased, thereby preventing tearing and perforation. This thinning process can be achieved by forming a through-hole penetrating in the axial direction on the side surfaces of the convex embossing rolls 10A and 10B, or by forming a concave part by counterboring. In FIG. 2, circular thinning portions 40 and 40 in which through holes are formed are provided. In addition, in order to prevent rotation blurring, it is desirable to arrange such a meat removal processing part 40 at equal intervals in the rotation direction.

  Furthermore, in the more preferable form of the ply crimping embossing device 1 of the present invention, as shown in FIGS. 8 and 9, two convex embossing rolls 10A and 10B are pressed against the receiving roll 20 by the cylinder devices 50 and 50, respectively. It is supposed to be. In this way, the convex embossing rolls 10 </ b> A and 10 </ b> B move independently and come into contact with the receiving roll 20, so that one-sided contact is less likely to occur. Further, the edge 30E of the convex portion 30 is not worn, and the wear of the convex embossing rolls 10A and 10B as a whole is reduced, so that the speed and the life can be increased. As the cylinder device 50, an air cylinder, a hydraulic cylinder, or the like can be used, but a light air cylinder is particularly preferable.

  Furthermore, in the illustrated form, the convex embossing rolls 10A and 10B can be adjusted only by the distance between the receiving rolls without substantial movement in the circumferential direction (rotating direction) of the receiving rolls by the guide rail. It has become. More specifically, the convex embossing rolls 10A and 10B are supported on both axes by bearings 51 and 51 such as arms and backing plates located on both sides of the convex embossing rolls 10A and 10B. Grooves are formed in the lower portions 52, 52 at both side positions, and are fitted and guided by two guide rails 53, 53 extending toward the receiving roll 20 at both side positions of the convex embossing roll. ing. In the illustrated embodiment, a groove is formed in the lower portion of the bearing portion 51 and is guided by being fitted to the guide rail. However, the lower portion of the bearing portion 51 is fitted in the guide groove extending in the receiving roll direction. In this way, it may be guided. Moreover, the bearing part 51 does not need to be formed by one member.

  The bearings 51 and 51 are movable by the cylinder device 50, and the entire unit including the convex embossing rolls 10A and 10B, the shaft and the bearings 51 and 51 is directly moved by the cylinder device 50. It is a formula.

  In this embodiment, the convex embossing rolls 10A and 10B are supported on both shafts by the bearing portions 51 and 51 located on both sides, so that the convex embossing rolls 10A and 10B are less likely to be shaken with respect to the bearing portions 51 and 51. Since the lower portion 52 of the bearing portion 51 is guided by the guide rail 53, the bearing portion 51 is also difficult to shake. Further, only the distance between the convex embossing rolls 10A and 10B and the receiving roll 20 is adjusted by the guide by the guide rail, and the position of the receiving roll 20 in the circumferential direction does not change. For this reason, the state in which the convex embossing rolls 10A and 10B are in contact with the receiving roll 20 is extremely stably maintained, and the one-piece contact is hardly generated. Even if the position is adjusted, there is little friction and load on the conveyed base paper. Therefore, the ply pressure bonding can be performed stably without tearing.

  On the other hand, the embossing pattern of the convex embossing strip 31 of the ply pressure bonding embossing device 1 according to the present invention is not necessarily limited. It is a twill pattern by knurling as shown in FIG. 4, and in particular, the top portion 35 of the convex portion 30 can be made flat. Particularly preferably, as shown in FIGS. 4 and 5, the arrangement pattern of the convex portions 30 arranged on the peripheral surfaces of the convex embossing rolls 10 </ b> A and 10 </ b> B is arranged at each position in the rotation direction (for example, the G position, (E position, F position, etc.) at least one top part 35 of the convex part 30 or a part of the top part 35 of the convex part 30 exists in the axial direction, and the top part 35 and the receiving roll of the convex part 30 of the convex embossing rolls 10A, 10B. 20 is always in contact with the pattern. In such a pattern in which the top portion 35 of the convex portion 30 of the convex embossing rolls 10A and 10B and the receiving roll 20 are always in contact with each other, rattling and vibration of the convex embossing rolls 10A and 10B are reduced, and ply pressure embossing is applied. Noise is reduced, and the problems of wear resistance, perforation and tearing of the convex embossing rolls 10A and 10B are significantly eliminated.

Hereinafter, household ply paper is manufactured using the ply crimping embossing device according to the present invention (Examples 1 to 4) and the ply crimping embossing device of Comparative Example 1 and the conventional example, and “ply peeling prevention” is manufactured. Evaluation was made on “vibration, rattling” and “abrasion resistance” of the convex embossing roll at that time. In particular, in this example, the conveyance speed at the time of the ply bonding process is about 150% faster than the speed used in the conventional example 1, and the evaluation is performed when the operation speed is increased. Yes. As the laminated continuous sheet, a two-ply structure in which two paper sheets, which are base papers of tissue paper having a basis weight of 10.7 g / m ² , were used. The basis weight was measured according to JIS P 8124 (1998). The paper thickness is 110 μm with 2 plies. The paper thickness was measured under the conditions of JIS P 8111 (1998) using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) with 2 plies. The results are shown in Table 1 below.

  In addition, in the ply pressure bonding embossing device according to Examples 1 to 4, two convex embossing rolls having one convex embossing strip are in contact with each other at two positions in different rotational directions of one receiving roll 20, The diameter of the receiving roll is 500 mm, and the distance L2 between the two convex embossing rolls is 269 mm.

  In the ply pressure-bonding embossing device according to Comparative Example 1 and Conventional Example 1, one convex embossing roll having two convex embossing strips is in contact with each other at the same position in the rotation direction of one receiving roll. The roll diameter of a receiving roll is 500 mm similarly to Examples 1-4.

  Further, Example 1 is an overlapping arrangement pattern in which convex portions in the rotation direction of the convex portions shown in FIG. 4 are continuous, and the roll diameter is 300 mm and the conveyance speed is 1,400 m / min.

  Example 2 is an arrangement pattern in which the convex portions in the rotation direction of the convex portions shown in FIG. 5 do not continue and do not overlap, the roll diameter is 300 mm, and the conveyance speed is 1,400 m / min.

  Example 3 is an overlapping arrangement pattern in which convex portions in the rotation direction of the convex portions shown in FIG. 4 are continuous, the roll diameter is 240 mm, and the conveyance speed is 1,400 m / min.

  Example 4 is an arrangement pattern in which the convex portions in the rotation direction of the convex portions shown in FIG. 5 do not continue and do not overlap, the roll diameter is 240 mm, and the conveyance speed is 1,400 m / min.

  Comparative Example 1 is a ply pressure bonding using a convex embossing roll having an overlapping arrangement pattern in which the convex portions in the rotation direction of the convex portions shown in FIG. Embossing was given. The roll diameter of the convex embossing roll was 250 mm, and the conveyance speed was 1,200 m / min.

  Conventional example 1 is the above-described conventional device, in which the projections of the array pattern subjected to the so-called twill knurling process in which each vertex of the rhombus that is the array pattern of the conventional protrusions is directed in the rotation axis direction and the rotation direction, respectively. The embossing roll was used to give ply pressure bonding embossing. The convex embossing roll had a roll diameter of 250 mm and a conveyance speed of 920 m / min.

  In addition, about vibration and shakiness, the state of the convex embossing roll at the time of giving ply press-bonding embossing to a laminated continuous sheet of about 18,000,000 m was visually confirmed, and the conventional example was used as a standard. The case where the vibration and the rattling were significantly improved was evaluated as ◎, the case where the vibration was slightly improved as ○, and the case where the vibration was not improved as x.

  Regarding the wear resistance of the convex embossing roll, after the vibration and shakiness tests were performed, that is, after applying the ply pressure bonding embossing to the laminated continuous sheet of about 18,000,000 m, the wear of the convex embossing roll was The condition of wear was confirmed visually, and the progress of wear and the occurrence of uneven wear were less than the conventional example or equivalent to the conventional example, and the progress of wear and the occurrence of uneven wear were slightly improved from the conventional examples. It was decided to evaluate as ◯ when there was an obscuration, and as ◎ when there was a clear improvement over the progress of wear and the occurrence of uneven wear.

  As shown in FIG. 7 (1) front view and (2) side view, the ply peeling prevention property is 20 mm in the width direction (CD direction) so as to include a portion provided with contact embossing of the laminated continuous sheet. , Prepare a sample cut 100 mm in the continuous direction (MD direction), peel the sample 30 mm from one end in the continuous direction, set the separation end 25 mm to each chuck of the tensile tester, set The strength of ply peeling when the chuck was pulled 50 mm at a speed of 100 mm / min was measured and evaluated from the measured value. In this test, if the measured value is 4.5 cN or more in this test, it can be determined that there is almost no risk of ply peeling. Therefore, the measured value is 4.5 cN or more, and the measured value is less than 4.5 cN. X was evaluated.

  As shown in Table 1, when ply pressure-bonding embossing was applied according to the present invention, good results were obtained in the prevention of ply peeling. In addition, “abrasion resistance of the convex embossing roll” and “vibration and rattling” at the time of manufacture are remarkably improved. In particular, in this example, the test was carried out by increasing the conveying speed (processing speed) as a test, and the ply pressure bonding embossing apparatus according to the present invention was used to perform the ply pressure bonding of household thin paper. It is possible to speed up.

  As described above, according to the ply pressure bonding embossing apparatus according to the present invention, the wear and vibration of the convex embossing roll at the time of applying the ply pressure bonding embossing is improved, and the conveying speed of the laminated continuous sheet at the time of applying the ply pressure bonding embossing is improved. It can be accelerated and the productivity of household thin paper can be increased.

  DESCRIPTION OF SYMBOLS 1,101 ... Ply crimping embossing device, 2,102 ... Laminated continuous sheet, 3,103 ... Ply crimping embossing, 10A, 10B, 110 ... Convex embossing roll, 20, 120 ... Receiving roll, 30 ... Convex part, 30E ... Convex Edge of part, 35 ... Top part of convex part, 31, 131 ... Convex embossing strip, 32 ... Slit (cutting) position, L1 ... Separation distance of convex embossing strip, L2 ... Separation distance of convex embossing roll, 40 ... Meat removal processing , 50 ... cylinder device, 51 ... bearing part, 52 ... lower part of bearing part, etc. 53 ... guide rail.

The present invention relates to a ply pressure bonding embossing device for applying ply pressure bonding embossing to household thin paper and a method for manufacturing household thin paper .

  2. Description of the Related Art Household thin paper such as tissue paper and toilet paper includes a plurality of ply sheets in which a plurality of base papers are laminated. Some of the multi-ply household thin papers are provided with ply crimping embossing to prevent the separation of each ply.

  This ply crimping embossing is also called edge embossing, knurling, contact embossing, etc., with a plurality of paper sheets used as the base paper for household thin paper laminated, and the peripheral surface is twilled knurled or has many squares Through the convex embossing roll, which is an embossing pattern in which the convex portions are arranged at a constant pitch, and a receiving roll paired with the convex embossing roll, the large number is provided at portions corresponding to both side edges of the household thin paper. It is formed by providing embossing of a pattern corresponding to the convex embossing pattern formed by the convex part or the like.

  A conventional ply pressure-bonding embossing device having a convex embossing roll and a receiving roll for applying ply pressure-bonding embossing is arranged on the convex embossing roll along its circumferential direction (rotation direction) as shown in FIG. The embossed strip formed by collecting a plurality of convex portions is arranged in two strips at intervals in the axial direction. Then, as described above, the laminated sheet in which the continuous sheets serving as the plies of the sanitary thin paper fed from the plurality of raw rolls are laminated between the convex embossing roll and the receiving roll as described above. Then, two ply pressure-bonded embosses are formed, and then the base paper is slit between the two ply pressure-bonded embosses. The formation of the two-ply pressure bonding emboss has the effect of increasing the stability of the subsequent slit.

  However, the conventional ply crimping embossing device has the following problems. First, when accelerating or decelerating the conveying speed of the laminated continuous sheets, tearing or perforation may occur. Secondly, ply peeling due to bouncing, noise, and wear of the convex embossing rolls occur when ply crimping embossing is applied. Third, only one of the two embossed strips may be hit. And it is difficult for these to raise the conveyance speed of a lamination | stacking continuous sheet. In addition, bouncing is a phenomenon in which the convex embossing roll vibrates and does not come into stable contact with the receiving roll, resulting in rattling.

Japanese Patent No. 5331530 Japanese Patent No. 4450421 Japanese Patent No. 5331503 Japanese Patent No. 5573594 Japanese Patent No. 5175625

Therefore, the main problem of the present invention is that it can improve the problems of the conventional ply crimping embossing device, can speed up the conveyance speed of the laminated continuous sheet when applying ply crimping embossing, and increase the productivity of household thin paper. An object of the present invention is to provide a ply crimping embossing device that can be used, and to provide a method for manufacturing household thin paper having a ply crimping step of forming a ply crimping emboss .

The present invention that has solved the above problems is as follows.
[Invention of Claim 1]
A ply pressure-bonding embossing device for forming two rows of ply pressure-bonding embosses parallel to the continuous direction of a laminated continuous sheet formed by laminating continuous sheets that are base paper for household thin paper,
Two convex embossing rolls, in which one convex embossing roll formed by a plurality of convex portions on the circumferential surface is arranged along the rotation direction, two locations where the receiving roll has different rotation directions. A ply pressure-bonding embossing device, wherein the convex embossing strips are in contact with each other at a position spaced apart in the axial direction.

[Invention of Claim 2]
The ply pressure-bonding embossing device according to claim 1, wherein the convex embossing roll has a diameter of 280 to 320 mm.

[Invention of Claim 3]
The ply pressure-bonding embossing device according to claim 1 or 2, wherein the convex embossing roll is lightened by a thinning process.

[Invention of Claim 4]
The arrangement pattern of the protrusions arranged on the peripheral surface of the convex embossing roll has at least one top of the convexity or a part of the top of the convexity in the axial direction at each position in the rotation direction. The ply pressure-bonding embossing device according to any one of claims 1 to 3, wherein the top portion of the portion and the receiving roll are always in contact with each other.

[Invention of Claim 5]
The ply pressure-bonding embossing device according to any one of claims 1 to 4, wherein each convex embossing roll is pressed against the receiving roll by a cylinder device.
[Invention of Claim 6]
For laminated continuous sheets made by laminating continuous sheets that are base paper for household thin paper,
A method of manufacturing a household thin paper having a ply crimping step of forming two rows of ply crimping embossments parallel to each other in a continuous direction,
Two convex embossing rolls, in which one convex embossing roll formed by a plurality of convex portions on the circumferential surface is arranged along the rotation direction, at different positions in the rotation direction of one receiving roll, are convex in the axial direction. Using a ply crimping embossing device,
A method for producing household thin paper, wherein two rows of ply pressure-bonded embosses are formed on a laminated continuous sheet.

According to the present invention as described above, the problems of the conventional ply crimping embossing device can be improved, the conveying speed of the laminated continuous sheet at the time of ply crimping embossing can be increased, and the productivity of household thin paper can be increased. A ply crimping embossing device is provided, and a method for producing household thin paper having a ply crimping process for forming ply crimping embossing is provided .

It is the top view seen from the lower part for demonstrating the ply crimping | compression-bonding embossing apparatus which concerns on this invention. It is a side view for demonstrating the ply pressure bonding embossing apparatus which concerns on this invention. It is a side view for demonstrating the effect of the ply crimping | embossing apparatus which concerns on this invention. It is a figure which shows the convex embossing pattern of embodiment of this invention. It is a figure which shows the example of the convex embossing pattern of 2nd embodiment of this invention. It is the top view seen from the lower part for demonstrating the conventional ply crimping | compression-bonding embossing apparatus. It is a figure for demonstrating the testing method of ply peeling prevention property. It is a figure for demonstrating the ply pressure bonding embossing apparatus which has a cylinder apparatus which concerns on this invention. It is the figure which looked at the ply crimping | embossing embossing apparatus which has a cylinder apparatus based on this invention from the receiving roll side.

An embodiment of the present invention will be described in detail with reference to FIGS.
The ply pressure bonding embossing device 1 according to the present embodiment has two pairs of convex embossing rolls 10A and 10B and a receiving roll 20 as shown in FIGS. 1 and 2, and each convex embossing roll 10A and 10B. Are arranged so that the circumferential surfaces thereof are in contact with the receiving roll 20 with the axial direction thereof aligned. In addition, in the top view shown in FIG. 1, two pairs of convex embossing roll 10A, 10B has shown the aspect which shares the receiving roll 20 with two or more.

  The convex embossing rolls 10A, 10B have a plurality of convex portions 30, 30... Arranged in a predetermined pattern corresponding to the pattern of the ply crimping emboss 3 on the peripheral surface, and the plurality of convex portions 30, 30. A single convex embossed strip 31 is formed along the direction. The single convex embossed strip in the present invention does not mean that the convex portions are in a line. It means that a set group composed of a plurality of convex portions forms one row as a whole.

  The ply pressure-bonding embossing device 1 according to the present invention is configured such that when a laminated continuous sheet 2 in which a continuous sheet that is a base paper of tissue paper or toilet paper is passed between the convex embossing rolls 10A and 10B and the receiving roll 20 is passed. The convex portions 30, 30,... Of the convex embossing rolls 10A, 10B are in pressure contact with the laminated continuous sheet 2, whereby the laminated continuous sheet 2 is ply-bonded.

  In the ply pressure-bonding embossing device 1 of the present invention, two convex embossing rolls 10A and 10B having a single convex embossing strip are convexly embossed in the axial direction at two positions where the rotational direction of one receiving roll 20 is different. 31 and 31 are in contact with each other so as to be separated from each other. Therefore, the laminated continuous sheet 2 first passes between the convex embossing roll 10A located on the upstream side in the conveying direction and the receiving roll, and then between the convex embossing roll 10B located on the downstream side in the conveying direction and the receiving roll. Pass through. The ply pressure-bonding embossing device 1 of the present invention is passed through the convex embossing rolls 10A, 10B and the receiving roll in this way, so that two rows of ply pressure-bonding embossing 3, 3 are provided.

  Each of the convex embossing rolls 10A and 10B can be independently installed on a frame or the like by a fixing means having a known bearing portion such as a cantilever arm or a both-end arm or a clamp. The laminated continuous sheet 2 provided with two rows of ply pressure bonding embosses 3 and 3 is then slit or cut between the two rows of ply pressure bonding embosses 3 and 3 so that tissue paper or toilet paper is provided. (FIG. 1, slits and cutting positions are indicated by symbol A).

  Advantages of the ply pressure bonding embossing device 1 of the present invention over the conventional example will be described. First, as shown in FIG. 6, two convex embossed strips 131, 131 are formed on one convex embossed roll 110, and each convex embossed strip 131, 131 of this one convex embossed roll 110 is the rotational direction of one receiving roll 120. In the conventional ply pressure bonding embossing device (hereinafter also referred to as a conventional device) 101 that contacts at the same position, two convex embossing strips 131 are formed at the time of ply pressure bonding when the laminated continuous sheet 102 passes between the convex embossing roll 110 and the receiving roll 120. , 131 often do not contact the paper surface ideally at the same time. This is because the continuous sheet, which is a base paper used as a thin paper for home use, has a fine crepe, is thin and has a low density and is easy to corrugate during transportation, and the surface is not as smooth as metal, and the convex embossed strip 131 is worn. by. When the two convex embossed strips 131 and 131 do not contact the paper surface ideally at the same time as described above, particularly, the laminated continuous sheet 102 is wrinkled between the two convex embossed strips 131 and 131. If the laminated continuous sheet 102 is excessively loaded, tearing occurs. Such a phenomenon is likely to occur when the conveyance speed of the laminated continuous sheet 102 is changed, that is, when the conveyance speed of the laminated continuous sheet is accelerated or decelerated.

  On the other hand, in the ply pressure bonding embossing device 1 according to the present invention shown in FIG. 1, the two convex embossing rolls 10 </ b> A and 10 </ b> B are in contact with each other at two different positions in the rotational direction of the single receiving roll 20. The sheet 2 passes between the convex embossing rolls 10A and 10B having only one convex embossing strip 31 and the receiving roll 20 twice with a time difference, so that two rows of ply crimping embossing 3 and 3 are given. Therefore, when the laminated continuous sheet 2 passes the laminated embossing rolls 10A and 10B and the receiving roll 20 through the laminated continuous sheet 2 and ply pressure-bonds, there is room for wrinkles to escape in a wide range in the paper width direction. The wrinkles and tears do not occur as in the conventional device 101.

  Further, in the ply crimping embossing device, the convex embossing strip is composed of a plurality of convex portions, so that the convex portion is always worn, and as described above, the laminated continuous sheet to be subjected to the ply crimping embossing Due to characteristics and the like, the convex embossed strip on the peripheral surface often wears unevenly without being evenly worn. In the conventional apparatus 101, when one convex embossed strip 131 of the two convex embossed strips 131 and 131 is worn, the one convex embossed strip 131 does not contact the paper surface. The convex embossed strip 131 may not contact the paper surface. In addition, when wear occurs on one convex embossing strip 131, the entire convex embossing roll needs to be replaced even if the other convex embossing strip 131 is not worn.

  On the other hand, in the ply crimping embossing device 1 according to the present invention, since only one convex embossing strip 31 is arranged on the convex embossing rolls 10A and 10B, only one convex embossing strip 131 like the conventional device 101 is provided. Problems due to wear cannot occur, and even when the respective convex embossing strips 31 and 31 for providing two rows of ply crimping embossing are worn, it is possible to replace the convex embossing rolls 10A and 10B. .

  Here, in the ply pressure bonding embossing device 1 according to the present invention, it is desirable that the distance L1 between the two convex embossing rolls 10A and 10B, particularly the axial direction of each convex embossing strip 31, is 10 to 35 mm. The phenomenon of ply peeling in household thin paper such as toilet paper and tissue paper usually arises from the edge of household thin paper. Therefore, the ply pressure-bonding emboss 3 is formed on the edge of household thin paper in order to enhance the prevention of ply peeling. Usually, it is arranged within 15 mm from the edge. As described above, according to a conventional method for manufacturing household thin paper, slits and cutting are performed at A between two rows of ply crimping embossing 3 and 3 formed by the ply crimping embossing device 1, and the slit position and cutting are performed. Since the position A becomes the edge of the household thin paper, in the ply crimping embossing device 1 according to the present invention, it is desirable that the axial separation distance L1 of the convex embossed strips 31, 31 is 35 mm or less. On the other hand, when the separation distance L1 is excessively narrow to less than 10 mm, it becomes difficult to slit or cut. Furthermore, since the distance between the ply pressure-bonding emboss 31 by the second convex embossing roll 10B and the ply pressure-bonding emboss 31 in the first convex embossing roll 10A applied in advance is reduced, the risk of wrinkles is increased. In addition, the installation space becomes difficult.

  The separation distance (separation distance between the contact positions of the receiving rolls 20) L2 between the two convex embossing rolls 10A and 10B in the ply pressure bonding embossing device 1 according to the present invention is preferably 230 to 325 mm. Conventionally, the conveyance speed of a general laminated continuous sheet is about 600 to 1200 m / min, and when the distance L2 between the two convex embossing rolls 10A and 10B is less than 230 mm, the book is given in two steps with a time difference. The advantage of the time difference of the ply pressure-bonding embossing device 1 that is characteristic of the invention is difficult to be expressed. In particular, when the separation distance L2 is used, the laminated continuous sheet can be accelerated more than the conventional conveyance speed. On the other hand, in order for the sheet conveying speed to exceed 1200 m / min, it is necessary to increase the diameter of the receiving roll 20, which causes a space problem. In particular, in a ply machine or an interfolder in which the ply pressure bonding embossing device 1 or the ply pressure bonding embossing device is installed, the convex embossing roll is originally configured to be replaceable due to wear, but the receiving roll is configured to convey the sheet. Since most of them also serve as a transport roll that forms a path, replacement is difficult. Therefore, since the enlargement of the diameter of the receiving roll often requires a significant modification of existing equipment, it is difficult to increase the diameter of the receiving roll in the field of household thin paper manufacturing.

  On the other hand, the ply crimping embossing device 1 according to the present invention does not have the two convex embossing strips 131 unlike the convex embossing roll 110 of the conventional device 101, and therefore the thickness (axial thickness) of the convex embossing rolls 10A and 10B is thin. This can reduce the weight. Furthermore, since the weight and the contact position of the two convex embossing rolls 10A and 10B with respect to the receiving roll 20 are different in the rotation direction, there is a margin in the installation space. As a result, the diameters of the convex embossing rolls 10A and 10B can be increased. Specifically, the diameter of the conventional convex embossing roll 110 is approximately 240 to 260 mm. In the ply pressure bonding embossing device 1 according to the present invention, the diameters of the convex embossing rolls 10A and 10B are 280 to 320 mm, the receiving roll. It is possible to easily enlarge the diameter up to 60 to 90%.

  Since the convex embossing roll in the ply pressure bonding embossing device 1 does not have a drive source for rotating the convex embossing roll, the followability of the laminated continuous sheet 2 to the paper surface, particularly the laminated continuous sheet, is reduced when the weight is reduced. 2, the followability at the time of acceleration / deceleration is greatly improved, the ply crimping emboss 3 is appropriately applied, and tears and perforations are reduced. Moreover, the expansion of the diameter of the convex embossing rolls 10 </ b> A and 10 </ b> B results in an increase in the circumferential length, and the wear resistance of the convex portion 30 constituting the convex embossing strip 31 is improved. Further, particularly, as shown in FIG. 2, when the diameters of the convex embossing rolls 10A and 10B are enlarged, the edges 30E of the convex portions 30 given to the peripheral surfaces of the convex embossing rolls 10A and 10B are microscopically laminated continuous sheets. The angle (接触 A in the figure) at the time of contact with the paper surface (receiving roll peripheral surface) of 2 becomes small, so that the laminated continuous sheet 2 is less likely to be wrinkled or perforated. Such an effect is obtained by using the embossing rolls 10A and 10B that are particularly embossed in the basis weight and thickness of a known general household thin paper, particularly when the ply pressure bonding embossing is applied at a linear pressure necessary to prevent ply peeling. When the diameter exceeds 280 mm, it becomes remarkable. In addition, when the diameter of the convex embossing rolls 10A and 10B exceeds 320 mm, it becomes difficult in terms of equipment installation.

  Furthermore, in the ply pressure-bonding embossing device 1 of the present invention, the convex embossing rolls 10A and 10B can be increased in diameter and thinned, so that it is possible to reduce the weight by the thinning process. It is desirable to reduce the weight. In particular, the conventional apparatus 101 has two convex embossed strips 131 and 131, and since the convex embossing roll 110 has a thickness, it is difficult to perform the thinning process accurately in the axial direction. In the ply crimping embossing device 1 according to the present invention, the convex embossing rolls 10A and 10B can be increased in diameter, and the thickness can be reduced, so that the thinning process can be performed with high accuracy. Further reduction in weight is achieved by the blanking process, and the followability to the paper surface (receiving roll peripheral surface) of the laminated continuous sheet 2 at the time of acceleration / deceleration of the laminated continuous sheet 2 is increased, thereby preventing tearing and perforation. This thinning process can be achieved by forming a through-hole penetrating in the axial direction on the side surfaces of the convex embossing rolls 10A and 10B, or by forming a concave part by counterboring. In FIG. 2, circular thinning portions 40 and 40 in which through holes are formed are provided. In addition, in order to prevent rotation blurring, it is desirable to arrange such a meat removal processing part 40 at equal intervals in the rotation direction.

  Furthermore, in the more preferable form of the ply crimping embossing device 1 of the present invention, as shown in FIGS. 8 and 9, two convex embossing rolls 10A and 10B are pressed against the receiving roll 20 by the cylinder devices 50 and 50, respectively. It is supposed to be. In this way, the convex embossing rolls 10 </ b> A and 10 </ b> B move independently and come into contact with the receiving roll 20, so that one-sided contact is less likely to occur. Further, the edge 30E of the convex portion 30 is not worn, and the wear of the convex embossing rolls 10A and 10B as a whole is reduced, so that the speed and the life can be increased. As the cylinder device 50, an air cylinder, a hydraulic cylinder, or the like can be used, but a light air cylinder is particularly preferable.

  Furthermore, in the illustrated form, the convex embossing rolls 10A and 10B can be adjusted only by the distance between the receiving rolls without substantial movement in the circumferential direction (rotating direction) of the receiving rolls by the guide rail. It has become. More specifically, the convex embossing rolls 10A and 10B are supported on both axes by bearings 51 and 51 such as arms and backing plates located on both sides of the convex embossing rolls 10A and 10B. Grooves are formed in the lower portions 52, 52 at both side positions, and are fitted and guided by two guide rails 53, 53 extending toward the receiving roll 20 at both side positions of the convex embossing roll. ing. In the illustrated embodiment, a groove is formed in the lower portion of the bearing portion 51 and is guided by being fitted to the guide rail. However, the lower portion of the bearing portion 51 is fitted in the guide groove extending in the receiving roll direction. In this way, it may be guided. Moreover, the bearing part 51 does not need to be formed by one member.

  The bearings 51 and 51 are movable by the cylinder device 50, and the entire unit including the convex embossing rolls 10A and 10B, the shaft and the bearings 51 and 51 is directly moved by the cylinder device 50. It is a formula.

  In this embodiment, the convex embossing rolls 10A and 10B are supported on both shafts by the bearing portions 51 and 51 located on both sides, so that the convex embossing rolls 10A and 10B are less likely to be shaken with respect to the bearing portions 51 and 51. Since the lower portion 52 of the bearing portion 51 is guided by the guide rail 53, the bearing portion 51 is also difficult to shake. Further, only the distance between the convex embossing rolls 10A and 10B and the receiving roll 20 is adjusted by the guide by the guide rail, and the position of the receiving roll 20 in the circumferential direction does not change. For this reason, the state in which the convex embossing rolls 10A and 10B are in contact with the receiving roll 20 is extremely stably maintained, and the one-piece contact is hardly generated. Even if the position is adjusted, there is little friction and load on the conveyed base paper. Therefore, the ply pressure bonding can be performed stably without tearing.

  On the other hand, the embossing pattern of the convex embossing strip 31 of the ply pressure bonding embossing device 1 according to the present invention is not necessarily limited. It is a twill pattern by knurling as shown in FIG. 4, and in particular, the top portion 35 of the convex portion 30 can be made flat. Particularly preferably, as shown in FIGS. 4 and 5, the arrangement pattern of the convex portions 30 arranged on the peripheral surfaces of the convex embossing rolls 10 </ b> A and 10 </ b> B is arranged at each position in the rotation direction (for example, the G position, (E position, F position, etc.) at least one top part 35 of the convex part 30 or a part of the top part 35 of the convex part 30 exists in the axial direction, and the top part 35 and the receiving roll of the convex part 30 of the convex embossing rolls 10A, 10B. 20 is always in contact with the pattern. In such a pattern in which the top portion 35 of the convex portion 30 of the convex embossing rolls 10A and 10B and the receiving roll 20 are always in contact with each other, rattling and vibration of the convex embossing rolls 10A and 10B are reduced, and ply pressure embossing is applied. Noise is reduced, and the problems of wear resistance, perforation and tearing of the convex embossing rolls 10A and 10B are significantly eliminated.

Hereinafter, household ply paper is manufactured using the ply crimping embossing device according to the present invention (Examples 1 to 4) and the ply crimping embossing device of Comparative Example 1 and the conventional example, and “ply peeling prevention” is manufactured. Evaluation was made on “vibration, rattling” and “abrasion resistance” of the convex embossing roll at that time. In particular, in this example, the conveyance speed at the time of the ply bonding process is about 150% faster than the speed used in the conventional example 1, and the evaluation is performed when the operation speed is increased. Yes. As the laminated continuous sheet, a two-ply structure in which two paper sheets, which are base papers of tissue paper having a basis weight of 10.7 g / m ² , were used. The basis weight was measured according to JIS P 8124 (1998). The paper thickness is 110 μm with 2 plies. The paper thickness was measured under the conditions of JIS P 8111 (1998) using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) with 2 plies. The results are shown in Table 1 below.

  In addition, in the ply pressure bonding embossing device according to Examples 1 to 4, two convex embossing rolls having one convex embossing strip are in contact with each other at two positions in different rotational directions of one receiving roll 20, The diameter of the receiving roll is 500 mm, and the distance L2 between the two convex embossing rolls is 269 mm.

  In the ply pressure-bonding embossing device according to Comparative Example 1 and Conventional Example 1, one convex embossing roll having two convex embossing strips is in contact with each other at the same position in the rotation direction of one receiving roll. The roll diameter of a receiving roll is 500 mm similarly to Examples 1-4.

  Further, Example 1 is an overlapping arrangement pattern in which convex portions in the rotation direction of the convex portions shown in FIG. 4 are continuous, and the roll diameter is 300 mm and the conveyance speed is 1,400 m / min.

  Example 2 is an arrangement pattern in which the convex portions in the rotation direction of the convex portions shown in FIG. 5 do not continue and do not overlap, the roll diameter is 300 mm, and the conveyance speed is 1,400 m / min.

  Example 3 is an overlapping arrangement pattern in which convex portions in the rotation direction of the convex portions shown in FIG. 4 are continuous, the roll diameter is 240 mm, and the conveyance speed is 1,400 m / min.

  Example 4 is an arrangement pattern in which the convex portions in the rotation direction of the convex portions shown in FIG. 5 do not continue and do not overlap, the roll diameter is 240 mm, and the conveyance speed is 1,400 m / min.

  Comparative Example 1 is a ply pressure bonding using a convex embossing roll having an overlapping arrangement pattern in which the convex portions in the rotation direction of the convex portions shown in FIG. Embossing was given. The roll diameter of the convex embossing roll was 250 mm, and the conveyance speed was 1,200 m / min.

  Conventional example 1 is the above-described conventional device, in which the projections of the array pattern subjected to the so-called twill knurling process in which each vertex of the rhombus that is the array pattern of the conventional protrusions is directed in the rotation axis direction and the rotation direction, respectively. The embossing roll was used to give ply pressure bonding embossing. The convex embossing roll had a roll diameter of 250 mm and a conveyance speed of 920 m / min.

  In addition, about vibration and shakiness, the state of the convex embossing roll at the time of giving ply press-bonding embossing to a laminated continuous sheet of about 18,000,000 m was visually confirmed, and the conventional example was used as a standard. The case where the vibration and the rattling were significantly improved was evaluated as ◎, the case where the vibration was slightly improved as ○, and the case where the vibration was not improved as x.

  Regarding the wear resistance of the convex embossing roll, after the vibration and shakiness tests were performed, that is, after applying the ply pressure bonding embossing to the laminated continuous sheet of about 18,000,000 m, the wear of the convex embossing roll was The condition of wear was confirmed visually, and the progress of wear and the occurrence of uneven wear were less than the conventional example or equivalent to the conventional example, and the progress of wear and the occurrence of uneven wear were slightly improved from the conventional examples. It was decided to evaluate as ◯ when there was an obscuration, and as ◎ when there was a clear improvement over the progress of wear and the occurrence of uneven wear.

  As shown in FIG. 7 (1) front view and (2) side view, the ply peeling prevention property is 20 mm in the width direction (CD direction) so as to include a portion provided with contact embossing of the laminated continuous sheet. , Prepare a sample cut 100 mm in the continuous direction (MD direction), peel the sample 30 mm from one end in the continuous direction, set the separation end 25 mm to each chuck of the tensile tester, set The strength of ply peeling when the chuck was pulled 50 mm at a speed of 100 mm / min was measured and evaluated from the measured value. In this test, if the measured value is 4.5 cN or more in this test, it can be determined that there is almost no risk of ply peeling. Therefore, the measured value is 4.5 cN or more, and the measured value is less than 4.5 cN. X was evaluated.

  As shown in Table 1, when ply pressure-bonding embossing was applied according to the present invention, good results were obtained in the prevention of ply peeling. In addition, “abrasion resistance of the convex embossing roll” and “vibration and rattling” at the time of manufacture are remarkably improved. In particular, in this example, the test was carried out by increasing the conveying speed (processing speed) as a test, and the ply pressure bonding embossing apparatus according to the present invention was used to perform the ply pressure bonding of household thin paper. It is possible to speed up.

  As described above, according to the ply pressure bonding embossing apparatus according to the present invention, the wear and vibration of the convex embossing roll at the time of applying the ply pressure bonding embossing is improved, and the conveying speed of the laminated continuous sheet at the time of applying the ply pressure bonding embossing is improved. It can be accelerated and the productivity of household thin paper can be increased.

  DESCRIPTION OF SYMBOLS 1,101 ... Ply crimping embossing device, 2,102 ... Laminated continuous sheet, 3,103 ... Ply crimping embossing, 10A, 10B, 110 ... Convex embossing roll, 20, 120 ... Receiving roll, 30 ... Convex part, 30E ... Convex Edge of part, 35 ... Top part of convex part, 31, 131 ... Convex embossing strip, 32 ... Slit (cutting) position, L1 ... Separation distance of convex embossing strip, L2 ... Separation distance of convex embossing roll, 40 ... Meat removal processing , 50 ... cylinder device, 51 ... bearing part, 52 ... lower part of bearing part, etc. 53 ... guide rail.

Claims (5)

A ply pressure-bonding embossing device for forming two rows of ply pressure-bonding embosses parallel to the continuous direction of a laminated continuous sheet formed by laminating continuous sheets that are base paper for household thin paper,
Two convex embossing rolls, in which one convex embossing roll formed by a plurality of convex portions on the circumferential surface is arranged along the rotation direction, two locations where the receiving roll has different rotation directions. A ply pressure-bonding embossing device, wherein the convex embossing strips are in contact with each other at a position spaced apart in the axial direction.   The ply pressure-bonding embossing device according to claim 1, wherein the convex embossing roll has a diameter of 280 to 320 mm.   The ply pressure-bonding embossing device according to claim 1 or 2, wherein the convex embossing roll is lightened by a thinning process.   The arrangement pattern of the protrusions arranged on the peripheral surface of the convex embossing roll has at least one top of the convexity or a part of the top of the convexity in the axial direction at each position in the rotation direction. The ply pressure-bonding embossing device according to any one of claims 1 to 3, wherein the top portion of the portion and the receiving roll are always in contact with each other.   The ply pressure-bonding embossing device according to any one of claims 1 to 4, wherein each convex embossing roll is pressed against the receiving roll by a cylinder device.

Images