JP4303275B2 - Method for forming a cutting line on a sheet - Google Patents

Description

  The present invention relates to a sheet of paper, nonwoven fabric, film, composite of nonwoven fabric and film, composite of nonwoven fabric and fiber web, composite of film and fiber web, composite of film, nonwoven fabric and fiber web, and the like. The present invention relates to a method for forming a plurality of cutting lines having a predetermined length.

A general method for forming a predetermined length of cutting line on the various sheets is a cutter roll in which a plurality of cutting blades for setting the length of the cutting line on the outer peripheral surface are intermittently formed, and the outer peripheral surface is the cutting Using an anvil roll as a receiving surface of the blade, a sheet is supplied between the two rolls to rotate both rolls. During this rotation, the sheet is pressed and pressed between the cutting blade and the receiving surface, and cutting lines having the same length as the cutting blade are formed at a plurality of locations on the sheet (for example, the following patents) Reference 1).
JP-A-6-63898

  However, in the conventional method for forming a cutting line, the length of the cutting edge of the cutting blade of the cutter roll (the length of the cutting edge extending in the roll axis direction) matches the length of the cutting line formed on the sheet. Cutting blades are arranged at intervals on the outer peripheral surface of the roll. As described above, when the cutting edge of each cutting blade is short, the strength of the cutting blade is weakened, the cutting edge is easily worn, and the cutting blade is likely to be broken or chipped.

In addition, for example, the above-described conventional sheet may be a bulky sheet having a basis weight of 50 g / m ² or more, in which a layer of long fibers or a split yarn layer opened from TOW is laminated on a base sheet such as a nonwoven fabric. When an intermittent cutting line arranged obliquely with respect to the sheet feeding direction (MD) is to be formed as in the cutting line forming method, the cutting line extends obliquely with respect to the circumferential direction of the cutter roll. By the cutting blade, an offset force in the width direction (CD) is applied to the bulky long fiber layer or split yarn layer. As a result, problems such as the fiber layer shifting on the sheet are likely to occur.

  Moreover, when the cutter blade and the anvil roll are rotated to form the cutting blade, one cutting blade is pressed against the receiving surface many times. As a result, the cutting edge of the cutting blade is severely worn. Furthermore, if the cutting blade hits the same part of the receiving surface of the anvil roll many times, the receiving surface of the anvil roll will be severely damaged and worn.

  The present invention solves the above-mentioned conventional problems, and makes the length of the cutting edge of the cutting blade (the length of the cutting edge extending in the roll axis direction and / or the circumferential direction of the roll) longer than the length of the cutting line. Another object of the present invention is to provide a method for forming a cutting line on a sheet so that the cutting blade can be prevented from being worn and broken or chipped.

  Moreover, this invention provides the formation method of the cutting line to the sheet | seat in which the offset force made it hard to act on the fiber layer on a sheet | seat by arranging the cutting line | wire arranged diagonally on a sheet | seat in V shape. It is aimed.

  A further object of the present invention is to provide a method for forming a cutting line on a sheet that can extend the life of the cutting edge by allowing the cutting edge of the cutting edge to move a portion that contacts the receiving surface.

The present invention uses a cutter roll having a cutting blade protruding from an outer peripheral surface and an anvil roll that receives the cutting blade, supplies a sheet between the two rolls, rotates the rolls, In the method of forming the cutting line on the sheet for forming the cutting line,
While the cutting blade of the cutter roll is formed in a V shape, the top of the V shape is set to the front in the rotation direction of the cutter roll, while the cutting when the cutting line is formed on the anvil roll. The receiving surface of the blade is formed at intervals in the roll axis direction,
When the cutting blade and the receiving surface come into contact with each other and the cutting blade hits the receiving surface, the receiving surface is moved so that the contact point between the cutting blade and the receiving surface moves along the cutting edge of the cutting blade. , Formed so that the position moves in the roll axis direction as it goes in the circumferential direction,
In a state where at least the V-shaped top of the cutting blade is set at a position facing the receiving surface, the cutter roll is rotated together with the anvil roll to cut the sheet from the V-shaped top side. The cutting lines corresponding to the width dimension of the receiving surface are arranged at intervals in the extending direction of the receiving surface, and are intermittently formed along the V-shape.

  In the present invention, the length of the cutting edge of the cutting blade of the cutter roll (the line length of the cutting edge extending in the roll axis direction and / or the circumferential direction of the roll) is not shortened, but the receiving surface to which the cutting blade hits has a predetermined width. When the sheet is pushed and cut by the cutting blade and the receiving surface, a cutting line having a length corresponding to the width of the receiving surface can be formed. Therefore, since it is not necessary to shorten the cutting edge length of the cutting blade, wear of the cutting blade can be reduced, and breakage and chipping of the cutting blade can be prevented.

In the present invention, for example, a bulky sheet having a basis weight of 50 g / m ² or more and a width direction in which a layer of long fibers opened from TOW or a layer of split yarn is overlapped on a substrate such as a nonwoven fabric or a film. When forming a cutting line that is obliquely arranged on the sheet on which the basis weight variation is likely to occur, the cutting line is arranged in a V shape, and the contact point between the cutting blade and the receiving surface is V-shaped. Progress from the apex side toward the V-shaped opening side.

  As a result, when both rolls rotate, a force is applied to the sheet substantially equally in the width direction (CD) on the long fiber layer and split yarn layer with the V-shaped apex as the center. Therefore, an extreme offset force in the width direction does not act on the long fiber layer of the sheet, and the long fiber layer or the like is not easily displaced or has a large variation in bulk.

  The V-shape of the cutting blade in the present invention may be such that the V-shaped apex has an acute angle, or the V-shaped apex may have a curved shape. Furthermore, as shown in FIG. 2 (A), the V-shaped tail end of one of the cutting blades and the top of the other cutting blade V coincide with each other in the roll axis direction. It is preferable. If the top of the V-shape is made acute and coincides on the same line as described above, the pressure on the cutting blade when the cutting blade hits the receiving surface can be made constant.

  Moreover, in the said invention, the said receiving surface is helically formed in the surrounding surface of the said anvil roll, for example.

  In the present invention, since the receiving surface having a predetermined width provided on the anvil roll shifts in the roll axial direction as it goes in the circumferential direction of the anvil roll, for example, the cutting blade having a continuously extending blade tip and the receiving surface Each time the hitting position is repeated, the cutting edge moves in the extending direction. Therefore, it can prevent that only the same location of a cutting blade contacts a receiving surface, and can extend the blade edge life.

  Moreover, it is preferable that the diameter dimension to the blade edge | tip of the cutting blade of the said cutter roll differs from the diameter dimension of the said receiving surface of the said anvil roll.

  If the diameters of the cutter roll and the anvil roll are different, it is possible to prevent the cutting blade and the receiving surface from hitting only at the same position, reducing wear on both the cutting blade and the receiving surface, and extending the service life. It is.

  Furthermore, it is preferable that the hardness of the receiving surface of the anvil roll is lower than the hardness of the cutting blade of the cutter roll.

  In this case, while the cutting operation is continued for a long time, the receiving surface is more likely to be worn or damaged than the cutting blade. However, the wear or damage of the receiving surface formed on the outer peripheral surface of the anvil roll can be repaired by a simple method such as polishing the receiving surface while rotating the anvil roll.

  The sheet in the present invention is, for example, paper, non-woven fabric, film, composite of non-woven fabric and film, composite of non-woven fabric and fiber web, composite of film and fiber web, film, non-woven fabric and fiber web. Any of, but not limited to, complexes.

  In the present invention, as the fiber web, for example, a cutting line is formed on a sheet that is bulky and tends to vary in basis weight, such as a fiber that is opened from TOW or a bundle of long fibers such as split yarn. This is particularly effective when

  In the present invention, since the length of the cutting line is determined by the width dimension of the receiving surface of the anvil roll, the cutting blade of the cutter roll can be made longer than the cutting line. Therefore, it is not necessary to provide a cutting blade with a short cutting edge as in the prior art, the life of the cutting blade can be extended, and damage such as bending or chipping of the cutting blade can be prevented.

  Further, according to the present invention, when the cutting lines arranged in a V shape are formed, no offset force is generated on the sheet, and the cutting lines arranged in a V shape are regularly formed without causing distortion or displacement. Can be formed.

  Furthermore, by forming the receiving surface so as to extend obliquely with respect to the circumferential direction of the anvil roll, the contact point between the cutting blade and the receiving surface can be moved along the cutting edge line of the cutting blade. Local wear and damage can be prevented from occurring.

  Furthermore, the roll can be easily polished with a simple structure, and the production cost can be reduced and the production period can be shortened.

   1 to 4 show a reference example of a method for forming a cutting line on a sheet of the present invention, and FIG. 1 is a perspective view showing a state in which the sheet is sandwiched between a cutter roll and an anvil roll. 2 (A) is a developed view of the outer peripheral surface of the cutter roll shown in FIG. 1, FIG. 2 (B) is a developed view of the outer peripheral surface of the anvil roll shown in FIG. 1, and FIG. 3 is a cleaning in which a cutting line is formed by the above method. FIG. 4 is a sectional view taken along line IV-IV in FIG.

  FIG. 1 shows a cutter roll 1 and an anvil roll 10. The cutter roll 1 and the anvil roll 10 are made of, for example, cemented carbide or tool steel. In this reference example, the hardness of the metal material forming the receiving surface 11 of the anvil roll is lower than the hardness of the metal material forming the cutting blade 2 of the cutter roll 1.

  As shown in FIG. 1, the cutter roll 1 is rotated in the α direction and the anvil roll 10 is rotated in the β direction. In this case, it is preferable that rotational power is applied to at least the cutter roll 1, and rotational power synchronized with the cutter roll 1 may be applied to the anvil roll 10, or the anvil roll 10 is in a free rotating state, It may follow the cutter roll 1 and rotate.

  The sheet 20 is sandwiched between the cutter roll 1 and the anvil roll 10 and sent out according to the rotation direction of each roll. In FIG. 1, MD is the feeding direction of the sheet 20, and CD is the width direction of the sheet 20 and the roll axis direction of both rolls 1 and 10.

  A plurality of cutting blades 2 are formed on the outer peripheral surface of the cutter roll 1. Each cutting blade 2 is integrally formed on the outer peripheral surface of the cutter roll 1. As shown in FIG. 2 (A), in a state where the outer peripheral surface of the cutter roll 1 is unfolded, each of the cutting blades 2 is substantially V-shaped, arranged with a certain interval in the rotational direction, and rolls. It is formed continuously without interruption in the axial direction (CD).

  Each cutting blade 2 has a V-shaped top portion 2a directed forward (α direction) in the rotational direction, and a V-shaped open side (hem portion) 2b directed in the direction opposite to the α direction. In this reference example, the V-shaped top portion 2a has a curved surface shape. However, in order to make the contact pressure between the cutting blade 2 and the receiving surface 11 of the anvil roll 10 constant, it is preferable that the top portion 2a has an acute angle.

  Further, as shown in FIG. 2A, the end of the open side 2b of any one of the cutting blades 2 and the top 2a of the other cutting blade 2 coincide with each other on the same line L extending in the roll axis direction. It is preferable. By comprising in this way, the contact pressure of the cutting blade 2 and the receiving surface 11 can always be made constant.

  The anvil roll 10 is provided in parallel with the cutter roll 1, and the anvil roll 10 and the cutter roll 1 are elastically pressed by an elastic pressing means (not shown). A receiving surface 11 having a predetermined width dimension W is formed on the outer peripheral surface of the anvil roll 10. As shown in the development view of FIG. 2B, the receiving surface 11 is formed to be a cylindrical surface that extends linearly along the rotation direction of the anvil roll 10 and makes one round. The individual receiving surfaces 11 are separated by grooves 12, and the receiving surfaces 11 are formed with a certain distance d in the roll axial direction (CD) of the anvil roll 10.

  The width dimension W in the roll axis direction of the receiving surface 11 is preferably 1 mm or more, and the interval d in the roll axis direction of the receiving surface 11 is preferably 0.5 mm or more.

  The cutting blade 2 formed on the cutter roll 1 is V-shaped, and this cutting blade 2 is continuously formed without interruption in the roll axis direction of the cutter roll 1. The shape of the blade 2 may be interrupted at one or two points in the middle in the roll axis direction. However, the extending length of the cutting blade 2 in the roll axis direction (CD) needs to be longer than the width dimension W of the single receiving surface 11 in the roll axis direction, and both rolls 1 and 10 rotate. When doing so, the cutting blade 2 needs to have a length that hits at least two adjacent receiving surfaces 11.

  When the sheet 20 is supplied between the cutter roll 1 and the anvil roll 10, the sheet 20 is sent to the MD by the rotational force in the α direction of the cutter roll 1 and the rotational force in the β direction of the anvil roll 10. .

  In the case shown in FIG. 1, the cutting blade 2 is continuous without interruption in the roll axis direction of the cutter roll 1, but in the anvil roll 10, the receiving surface 11 having a predetermined width W is spaced apart in the roll axis direction by a distance d. Is formed. Therefore, the sheet 20 is pushed only at a location where the cutting blade 2 and the receiving surface 11 meet. As a result, a plurality of cutting lines 21 are formed in the sheet 20 by cutting. The cutting lines 21 are intermittently formed so as to be arranged in a V shape, and each cutting line 21 has an extension width in the roll axis direction (CD) that is equal to the width dimension of the receiving surface 11. They are the same W and are arranged with an interval d in the roll axis direction.

  The cutting line 21 formed intermittently has a V-shaped top 21a. That is, the receiving surface 11 of the anvil roll 10 is provided at a position where it contacts the V-shaped top 2 a of the cutting blade 2. The cutting line 21 has an inclined portion 21b extending from the top 21a in the direction opposite to the MD, and this extends intermittently to the V-shaped opening 21c.

  In the reference example shown in FIG. 1, the V-shaped top 2 a of the cutting blade 2 of the cutter roll 1 is directed forward (α direction) in the rotational direction. Accordingly, in the sheet 20, the cutting line 21 advances from the V-shaped top portion 21a, and this cutting extends toward the V-shaped opening 21c. When the inclined portion 21b of the cutting line 21 is formed, a force F directed outward in the width direction (CD) acts on the sheet 20 by the cutting blade extending obliquely.

  However, since this force F acts substantially horizontally from the V-shaped top portion 21a toward the outer side in the width direction, no offset force or force toward the center in the width direction acts on the sheet 20, Due to the forces F and F spreading evenly in the left-right direction, a tension spreading in the width direction acts on the sheet 20. Accordingly, the sheet 20 is cut without being deformed by the cutting blade 2 and the receiving surface 11, and the cutting line 21 is regularly formed without being distorted or displaced.

In particular, the structure of the sheet 10 is, for example, as shown in FIG. 4 on a base material formed of a nonwoven fabric 23 or a film or a composite of a nonwoven fabric and a film. When the fiber web 24 formed of fibers or the like is stacked, the basis weight is bulky of 50 g / m ² or more, and the basis weight of the fiber is likely to vary, the uniform force F, By providing F, the fiber web is less likely to be offset or concentrated on the sheet 10.

  Further, the diameter of the virtual cylinder including the cutting edge of the cutting blade 2 of the cutter roll 1 is different from the diameter of the receiving surface 11 of the anvil roll 10. Therefore, the cutting blade 2 is less likely to repeatedly hit the same part of the receiving surface 11 facing the cutting blade 2, and the cutting blade 2 hits a different part of the receiving surface 11 during rotation. Therefore, the receiving surface 11 is less likely to be locally worn out or locally damaged.

  Further, since the receiving surface 11 of the anvil roll 10 is formed of a material having a lower hardness than the cutting blade 2 of the cutter roll 1, the receiving surface 11 is more than the cutting blade 2 when cutting is repeated for a long time. Wear first. Therefore, the progress of wear of the cutting blade 2 can be delayed. Also, the wear and damage of the surface of the receiving surface 11 can be repaired by a simple process by rotating the anvil roll 10 and polishing the surface of the receiving surface 11.

  3 is a plan view showing a cleaning sheet 20A as an example of the sheet 20 on which the cutting line 21 is formed by the method shown in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

  The cleaning sheet 20A is obtained by laminating a fiber web 24 on a nonwoven fabric 23 as a base material. The nonwoven fabric 23 is a spunbond, thermal bond, spunlace nonwoven fabric, or the like, and includes heat-fusible fibers such as PET, PE, PP, or composite fibers thereof. Alternatively, a film that can be heat-sealed instead of the nonwoven fabric 23 may be used as the substrate, or a laminate of the nonwoven fabric 23 and the film may be used as the substrate.

  The fiber web 24 is a layer of long fibers such as fibers opened from TOW and split yarns, and the fibers mainly extend in the feeding direction (MD) of the sheet 20A. Fibers that have been opened from TOW and long fibers such as split yarns may have a length that extends the entire length of the MD of the cleaning sheet 20A. However, the fibers are a bundle of fibers that are shorter than the total length of the MD. A web 24 may be formed. The fibers forming the fiber web 24 also include heat-fusible fibers such as PET, PE, PP, or composite fibers thereof.

  Presser sheets 25, 25 are provided on both sides in the width direction (CD) of the cleaning sheet 20A. The presser sheets 25 and 25 are equivalent to the non-woven fabric 23, the both sides of the fiber web 24 are sandwiched between the non-woven fabric 23 and the presser sheets 25 and 25, and the non-woven fabric 23 and the presser sheets 25 and 25 are Bonded with a hot-melt adhesive or heat-sealed.

  The cleaning sheet 20 </ b> A is provided with a fusion line 22 having the same pattern as the cutting line 21, that is, a V-shaped continuous line pattern. The non-woven fabric 23 and the fiber web 24 are pressurized and heat-sealed by the fusion line 22. The fusion line 22 is formed by supplying a sheet between a heating roll having a V-shaped pressurizing portion formed on the surface and a receiving roll facing the heating roll.

  The cleaning sheet 20 </ b> A on which the fusion line 22 is formed is supplied between the cutter roll 1 and the anvil roll 10 shown in FIG. 1, so that the fusion line 22 and the fusion line 22, The cutting lines 21 arranged in the V shape are formed. At the portion of the cutting line 21, the nonwoven fabric 23 and the fiber web 24 are cut together.

  Furthermore, the fiber which comprises the fiber web 24 is processed so that it may become fluffy as needed. As a result, in the area 26 indicated by hatching in FIG. 3, the fibers forming the fiber web 24 are fastened by the fusion line 22, and the fibers are released at the cutting line 21. Therefore, a plurality of fibers extending from the fusion line 22 to the cutting line 21 are in a brush shape. The brush-like fiber layer is formed in all regions sandwiched between the fusion line 22 and the cutting line 21.

  In the cleaning sheet 20 </ b> A, dust or the like can be wiped off by the brush-like fiber layer, and in a portion where the cutting line 21 is not formed, between the adjacent fusion line 22 and the fusion line 22 in the MD. The fiber layer extends in a bridge shape, and dust and relatively large dust can be captured between the fibers at this portion.

  5 and 6 show an embodiment of the cutting line forming method of the present invention. FIG. 5 (A) is a developed view of the outer peripheral surface of the cutter roll 1, and FIG. 5 (B) is an anvil roll 10A. FIG. 6 is a developed view of the outer peripheral surface, and FIG. 6 is a plan view showing the sheet 20B on which cutting lines are formed.

  The cutter roll 1 shown in FIG. 5 (A) is the same as the cutter roll 1 shown in FIG. 2 (A), and substantially V-shaped cutting blades 2 are formed at regular intervals in the rotation direction (α direction). ing. This cutting blade 2 is formed as a continuous line without interruption in the roll axis direction (CD).

  On the outer peripheral surface of the anvil roll 10A shown in FIG. 5B, a receiving surface 11 having a predetermined width W and a groove 12 that separates the receiving surface 11 with a gap d in the roll axis direction are formed. The width dimension W of the receiving surface 11 in the roll axis direction (CD) is preferably 1 mm or more, and the interval d of the receiving surface 11 in the roll axis direction (CD) is preferably 0.5 mm or more.

  However, the receiving surface 11 is inclined with respect to the circumferential direction θ so that the receiving surface 11 moves in the roll axis direction (CD) as it goes in the circumferential direction (rotation direction: β direction). It is formed in the direction which has. That is, in the anvil roll 10A, the receiving surface 11 having a predetermined width W is formed in a spiral shape in the roll axis direction.

  Although the inclination angle θ is not particularly limited as long as it exceeds 0 degrees, the receiving surface 11 is set so as to be shifted by W + d in the roll axis direction when the anvil roll 10 makes one turn. The receiving surface 11 forms a single spiral continuous in the circumferential direction of the anvil roll 10. However, the receiving surface 11 may form two or more spirals continuous in the circumferential direction of the anvil roll.

  Moreover, when the angle at which the cutting blade 2 of the cutter roll 1 is inclined with respect to the circumferential direction of the roll is θ1, it is preferable that θ is (1/2) · θ1 or less.

  FIG. 6 shows a sheet that is supplied between the cutter roll 1 and the anvil roll 10A shown in FIGS. 5A and 5B and has a cutting line 21 formed thereon. 6 shows a cleaning sheet 20B, and the sheet structure is the same as the cleaning sheet 20A shown in FIGS. In the cleaning sheet 20 </ b> B shown in FIG. 6, a fusion line 22 is formed similarly to the cleaning sheet 20 </ b> A shown in FIG. 3, and a cutting line 21 is formed between the fusion lines 22.

  In the embodiment shown in FIGS. 5 and 6, since the receiving surface 11 of the anvil roll 10 </ b> A is formed in a spiral shape in the roll axis direction, the cutting line 21 formed on the cleaning sheet 20 </ b> B is the receiving surface 11. And has a length corresponding to the width dimension W in the roll axis direction (CD), and is formed so as to be arranged at an angle θ with respect to the MD in accordance with the extending direction of the receiving surface 11.

In the embodiment shown in FIGS. 5 and 6, the receiving surface 11 of the anvil roll 10A is formed in a spiral shape. Accordingly, the portion of the cutting edge of the cutting blade 2 that contacts the receiving surface 11 moves along the cutting edge of the cutting blade 2 as it rotates. For example, when a predetermined cutting blade 2 indicated by (i) in FIG. 5A hits the receiving surface 11 of the anvil roll 10A, a cutting line 21 indicated by (ii) in FIG. 6 is formed.
Thereafter, when the cutter roll 1 and the anvil roll 10A rotate and the cutting blade 2 of (i) hits the receiving surface 11, the contact point between the cutting blade 2 and the receiving surface 11 is the cutting edge line of the cutting blade 2 Along the roll axis direction (CD).

  For this purpose, it is necessary that the diameter of the virtual cylinder including the cutting edge of the cutter roll 1 is different from the diameter of the receiving surface 11 of the anvil roll 10A. When a difference is provided in the diameter as described above, the contact points between the cutting blade 2 and the receiving surface 11 shown in the above (i) are shifted in the circumferential direction with the rotation of the roll. Since the receiving surface 11 is inclined so as to move in the roll axis direction toward the circumferential direction of the anvil roll 10A, the contact point between the cutting blade 2 and the receiving surface 11 shown in FIG. Corresponding to the inclination (θ) of the cutting blade 2 along the cutting edge line of the cutting blade 2 in the roll axis direction.

  When the receiving surface 11 is inclined with respect to the circumferential direction and the diameters of both rolls are changed in this way, the contact point between the cutting blade 2 and the receiving surface 11 becomes the cutting edge of the cutting blade 2 as the roll rotates. The cutting blade 2 does not hit the same location on the receiving surface 11 as well. Therefore, only the same part in both the cutting blade 2 and the receiving surface 11 is not locally worn out or damaged.

  In addition, the embodiment shown in FIGS. 5 and 6 has the same effect as that described in the reference example.

  7 and 8 show another reference example of the present invention, and an anvil roll 10A shown in FIG. 7B is the same as that shown in FIG. 5B. However, in the cutter roll 1A shown in FIG. 7A, the cutting blade 2A protruding from the outer peripheral surface is perpendicular to the rotation direction (α direction) and extends linearly in the roll axis direction (CD). Yes.

  The cleaning sheet 20C shown in FIG. 8 has a cutting line 21A formed by the cutter roll 1A and the anvil roll 10A shown in FIGS. The cleaning sheet 20 </ b> C shown in FIG. 8 has the same layer structure as that shown in FIGS. 3, 4, and 6, and is formed by laminating a nonwoven fabric 23 and a fiber web 24. In the case shown in FIG. 8, the cutting lines 21A are arranged linearly and perforated in the width direction (CD). Between the cutting line 21A and the cutting line 21A, a fusion line 22A linearly extending to the CD is provided, and the nonwoven fabric and the fiber web are joined by the fusion line 22A.

  The diameter of the virtual cylinder including the cutting edge 2A of the cutter roll shown in FIG. 7A is different from the diameter of the receiving surface 11 of the anvil roll 10A shown in FIG. 7B, and the receiving surface 11 is rotated. It is formed in a spiral shape that is inclined at an angle θ with respect to the direction. Therefore, when both rolls 1A and 10A rotate, the contact point between the cutting blade 2A and the receiving surface 11 moves in the roll axis direction along the cutting edge line of the cutting blade 2A, and also on the receiving surface 11 The contact point with the cutting blade 2A moves. Therefore, similarly to the embodiment shown in FIGS. 5 and 6, it is possible to prevent the local abrasion and damage between the cutting blade 2A and the receiving surface 11 from occurring.

  In the cleaning sheet 20 </ b> C shown in FIG. 8, the cutting lines 21 </ b> A are arranged along the receiving surface 11 with an angle θ with respect to the MD and spaced in an oblique direction. And in the area | region pinched | interposed by the fusion line 22A and the cutting line 21A, the fiber layer cut | disconnected by the cutting line 21A by using the fusion line 22A as a base end rises, and the brush part which becomes fluffy is formed. In a region where the cutting line 21A is not formed, a bridge-like fiber layer is formed across the fusion line 22 and the fusion line 22.

  In addition, the sheet | seat in this invention is not restricted to the composite sheet of the nonwoven fabric 23 and the fiber web 24 which are shown in FIG. 4, The composite sheet which laminated | stacked the nonwoven fabric, the composite of a film and a fiber web, or a film and a nonwoven fabric A composite sheet of a sheet, a film, a nonwoven fabric, and a fiber web may be used, or a single-layer sheet such as a nonwoven fabric, a film, or paper.

  Further, the purpose of forming the intermittent cutting line is not limited to forming the brush portion by standing the fiber like the cleaning sheet, but the perforated cutting line for opening the package, and the film to be breathable. It may be used for other purposes such as a cutting line for holding.

  Still another reference example used for forming a cutting line used for such an application is shown in FIGS. 9A is a development view of the cutter roll 1B, FIG. 9B is a development view of the anvil roll 10B, and FIG. 10 shows a cutting line 21B formed by the cutter roll 1B and the anvil roll 10B shown in FIG. It is a top view of 20D.

  In the cutter roll 1B shown in FIG. 9A, the cutting blade 2B is formed to extend in the circumferential direction, and this cutting blade 2B has an inclination of an angle θ2 with respect to the circumferential direction. The interval between the cutting blades 2B in the roll axis direction is d0. When the angle θ2 is set so that the cutting blade 2B deviates by d0 in the roll axis direction when the cutter roll 1B makes one turn, the cutting blade 2B forms a single spiral on the outer periphery of the cutter roll 1B. It becomes like this.

  In the anvil roll 10B shown in FIG. 9B, the receiving surfaces 11A and the grooves 11B are alternately formed in the circumferential direction of the roll. In FIG. 9B, the receiving surface 11A and the groove 11B are formed to be inclined with respect to the roll axis direction, but the receiving surface 11A and the groove 11B are formed in parallel so as to extend in the roll axis direction. It may be.

  When the sheet 20D is supplied between the cutter roll 1B and the anvil roll 10B and both rolls are rotated, the sheet 20D is pushed and cut at a portion where the cutting blade 2B and the receiving surface 11A are in contact with each other. As a result, a plurality of cutting lines 21B are formed on the sheet 20D. The cutting lines 21B are arranged with an interval d0 in the roll axis direction in the direction in which the receiving surface 11A extends, and the cutting lines 21B are arranged with an interval in the direction in which the cutting edge of the cutting blade 2B extends. .

  In this reference example, as both rolls rotate, the contact point between the cutting blade 2B and the receiving surface 11A is sequentially shifted in the extending direction of the cutting edge of the cutting blade 2B. In particular, if the diameters of the two rolls are different, when any of the receiving surfaces 11A (iii) and the cutting blade 2B come into contact with each other at a certain time, the receiving surface 11A (iii) is cut into the cutting blade 2B by the next rotation. The contact point shifts in the direction in which the cutting edge of the cutting blade 2B extends. Therefore, it is possible to avoid local wear on the cutting blade 2B as much as possible.

  As an example of a product in which a sheet 20D as shown in FIG. 10 is formed, a bulky nonwoven fabric is stacked on a substrate such as a nonwoven fabric or a film. When the cutting line 21B is formed, dust and dust are easily thinned between the base material and the nonwoven fabric at the portion of the cutting line 21B, which is suitable as a cleaning sheet.

It is a perspective view which shows the reference example of the formation method of the cutting line to the sheet | seat of this invention. (A) is a development view of the cutter roll shown in FIG. 1, and (B) is a development view of the anvil roll shown in FIG. It is a top view which shows the sheet | seat for cleaning in which the cutting line was formed by the method shown in FIG. It is sectional drawing of the IV-IV line of FIG. (A) is an expanded view of the cutter roll in one Embodiment of this invention, (B) is an expanded view of the anvil roll of one Embodiment. It is a top view which shows the sheet | seat for cleaning in which the cutting line was formed with the cutter roll and anvil roll shown in FIG. (A) is a development view of a cutter roll in another reference example of the present invention, and (B) is a development view of an anvil roll in another reference example. It is a top view which shows the sheet | seat for cleaning in which the cutting line was formed with the cutter roll and anvil roll shown in FIG. (A) is a development view of a cutter roll in still another reference example of the present invention, (B) is a development view of an anvil roll of still another reference example. It is a top view which shows the sheet | seat in which the cutting line was formed with the cutter roll and anvil roll shown in FIG.

Explanation of symbols

1, 1A, 1B Cutter roll 2, 2A, 2B Cutting blade 2a V-shaped top 2b of cutting blade V-shaped opening 10, 10A, 10B Anvil roll 11, 11A Receiving surface 12, 12A Groove 20, 20D Sheets 20A, 20B, 20C on which cutting lines are formed Cleaning sheets 21, 21A, 21B on which cutting lines are formed Cutting lines 21a V-shaped top portions 21b of cutting lines Inclined portions 21c of cutting lines V-shaped opening of cutting lines Part 22 Fusion wire 23 Non-woven fabric 24 Fiber web 25 Presser sheet

Claims (6)

Using a cutter roll with a cutting blade projectingly formed on the outer peripheral surface and an anvil roll that receives the cutting blade, a sheet is supplied between the two rolls, and each roll is rotated to form a cutting line on the sheet. In the method of forming the cutting line on the sheet to be
While the cutting blade of the cutter roll is formed in a V shape, the top of the V shape is set to the front in the rotation direction of the cutter roll, while the cutting when the cutting line is formed on the anvil roll. The receiving surface of the blade is formed at intervals in the roll axis direction,
When the cutting blade and the receiving surface come into contact with each other and the cutting blade hits the receiving surface, the receiving surface is moved so that the contact point between the cutting blade and the receiving surface moves along the cutting edge of the cutting blade. , Formed so that the position moves in the roll axis direction as it goes in the circumferential direction,
In a state where at least the V-shaped top of the cutting blade is set at a position facing the receiving surface, the cutter roll is rotated together with the anvil roll to cut the sheet from the V-shaped top side. And cutting lines corresponding to the width dimension of the receiving surface are arranged at intervals in the extending direction of the receiving surface and are intermittently formed along the V-shape. Line formation method.    2. The method for forming a cutting line on a sheet according to claim 1, wherein the receiving surface is formed in a spiral shape on the peripheral surface of the anvil roll.    3. The formation of a cutting line on a sheet according to claim 1, wherein a diameter dimension of the cutter roll to a cutting edge is different from a diameter dimension of the receiving surface of the anvil roll. Method.    The method for forming a cutting line on a sheet according to any one of claims 1 to 3, wherein the hardness of the receiving surface of the anvil roll is lower than the hardness of the cutting blade of the cutter roll. .    The sheet is any of paper, non-woven fabric, film, non-woven fabric-film composite, non-woven fabric / fiber web composite, film / fiber web composite, film / non-woven fabric / fiber web composite. The method for forming a cutting line on a sheet according to any one of claims 1 to 4, wherein the number is one.   6. The method for forming a cutting line on a sheet according to claim 5, wherein the fiber web is a long fiber layer.

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