WO2016067462A1 - Textured sheet manufacturing method and textured sheet manufacturing apparatus - Google Patents

Textured sheet manufacturing method and textured sheet manufacturing apparatus Download PDF

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Publication number
WO2016067462A1
WO2016067462A1 PCT/JP2014/079101 JP2014079101W WO2016067462A1 WO 2016067462 A1 WO2016067462 A1 WO 2016067462A1 JP 2014079101 W JP2014079101 W JP 2014079101W WO 2016067462 A1 WO2016067462 A1 WO 2016067462A1
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WO
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Prior art keywords
sheet
uneven
speed
rotating body
uneven sheet
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PCT/JP2014/079101
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French (fr)
Japanese (ja)
Inventor
聡 光野
Original Assignee
ユニ・チャーム株式会社
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Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to PCT/JP2014/079101 priority Critical patent/WO2016067462A1/en
Publication of WO2016067462A1 publication Critical patent/WO2016067462A1/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47Sanitary towels, incontinence pads or napkins
    • A61F13/472Sanitary towels, incontinence pads or napkins specially adapted for female use
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing

Abstract

The present invention is a textured sheet manufacturing method characterized in comprising: the formation of the textured sheet by heating a sheet while said sheet is passing between rotating bodies, the circumferential surfaces of which form a textured shape, to provide the textured shape; and the conveyance of the textured sheet that has passed through said rotating bodies at a slower speed than the circumferential speed of the rotating bodies.

Description

Method for producing uneven sheet, and, the uneven sheet manufacturing apparatus

The present invention relates to a method of manufacturing a uneven sheet, and a manufacturing apparatus of the uneven sheet.

As a surface sheet of an absorbent article such as sanitary napkins and disposable diapers, there are cases where uneven sheet having an uneven shape is utilized. As a method for producing uneven sheet, for example, between two rotating body rotating with a concave-convex portion facing each other in the circumferential surface, thereby forming an uneven shape on the first sheet supplying a first sheet after, to overlap the first sheet to provide a second sheet, a method of joining the two sheets and the like (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2009-202506

However, as in Patent Document 1, an uneven shape is formed on the first sheet, after bonding the first sheet and the second sheet, under tension to the first sheet, the second sheet When extending the portion of the convex portion that is not overlapped, reduces the height of the convex portion, the convex portion becomes easy to collapse.
The present invention was made in view of the above problems, a method of manufacturing a crush hardly uneven sheet protrusions, and to provide a manufacturing apparatus.

The main invention for achieving the above object, while the outer peripheral surface of the rotating body sheet passes forming the uneven shape, heating said sheet, and forming an uneven sheet having an irregular shape, the rotary member It said uneven sheet having passed through a manufacturing method of the uneven sheet characterized by having a carry at a slower speed than the peripheral speed of the rotating body.
Other features of the invention will become apparent from the description in this specification and the accompanying drawings.

According to the present invention, a method of manufacturing a crush hardly uneven sheet protrusion, and can provide a manufacturing apparatus.

Figure 1A is a side view of the uneven sheet of the first embodiment in the width direction, FIG. 1B is a plan view of the uneven sheet, Figure 1C is a sectional view taken along irregularities sheet continuous and thickness directions There, FIG. 1D is a sectional view taken along irregularities sheet in the width direction and the thickness direction. It is an explanatory view of a manufacturing apparatus of the uneven sheet in the first embodiment. Figure 3A is an explanatory view of the uneven sheet immediately after fed from the first embossing roller, Fig. 3B is an explanatory view of the uneven sheet fed from the rate adjustment conveyor. It is an explanatory view of a manufacturing apparatus of the uneven sheet in the second embodiment. It is an explanatory view of a manufacturing apparatus of the uneven sheet in the third embodiment. 6A and 6B are explanatory views of the uneven sheet of the fourth embodiment. It is an explanatory view of a manufacturing apparatus of the uneven sheet shown in FIG. 6A. It is an explanatory view of the uneven sheet of the fifth embodiment.

The description of this specification and the accompanying drawings, at least the following matters will be made clear.
The rotating body peripheral surface forms a concave-convex shape while the sheet passes, heating the sheet, and forming an uneven sheet having irregularities, the irregularities sheet having passed through the rotating body, the rotating body it is a manufacturing method of the uneven sheet characterized by having a carry at a slower speed than the peripheral speed.
According to the manufacturing method of such irregularities sheet, it is possible to weaken the tension applied to the uneven sheet having passed through the rotating body, or contract the uneven sheet extending on leaving from the rotating body, irregularities sheet is pulled strongly It may or suppressed that would extend in the conveying direction Te. Therefore, suppressing a decrease in height of the convex portion of the concavo-convex sheet, it can be difficult to collapse the protrusions.

A method of manufacturing a uneven sheet, uneven sheet wherein said uneven sheet having passed through the rotating body, transfer mechanism for transferring at a peripheral speed slower speed than the rotary body, which is a suction conveyor it is a method of manufacture.
According to the manufacturing method of the concave-convex sheet be conveyed without interposing an uneven sheet, and since the uneven sheet can solidify to early uneven cooling can be difficult and more crushed protrusions.

A method of manufacturing a uneven sheet, said uneven sheet that has passed through the rotating body, a transfer mechanism for transferring at a peripheral speed slower speed than the rotary body, between said rotary member, said uneven sheet it is a manufacturing method of the uneven sheet, wherein a conveyor to shrinkable transported supported while being is provided a.
According to the manufacturing method of such irregularities sheet, before the uneven sheet is fed to the transport mechanism, can be secured contraction time of uneven sheet extending on leaving the rotary body, also, the rotating member and the transporting mechanism the loosening of the uneven sheet in between can be suppressed.

A method of manufacturing a uneven sheet, a manufacturing method of the uneven sheet characterized by cooling the uneven sheet that has passed through the rotating body.
According to the manufacturing method of the concave-convex sheet, it is possible to solidify quickly irregularities of the uneven sheet, it can be difficult to further crush the convex portion.

A method of manufacturing a uneven sheet, a while the rotating body is the sheet passes, after forming the uneven shape on the seat, between the rotating body and the other of the rotary member, the sheet and the other by clamping pressure by bonding the sheet, a manufacturing method of the uneven sheet and forming the uneven sheet.
According to the manufacturing method of such irregularities sheet, as compared with the case of not joining the other sheet, so uneven sheet is hardly stretched in the conveying direction, suppressing a decrease in height of the convex portion of the concavo-convex sheet, protrusions it can be difficult to collapse the.

A method of manufacturing a uneven sheet, said other sheet supplied to the other rotating member is in the manufacturing method of the concave-convex sheet, characterized by conveying at a peripheral speed slower speed than the rotary body .
According to the manufacturing method of such irregularities sheet, since the other sheet is bonded to the sheet in a state of being stretched in the conveying direction, by the other sheet shrinks in the uneven sheet having passed through the rotating body, the convex portion can height is increased, less likely it collapses the protrusions.

A method of manufacturing a uneven sheet, the said sheet to be supplied to the rotating body, a manufacturing method of the uneven sheet, characterized by conveying at a peripheral speed faster speed than the rotor.
According to the manufacturing method of such irregularities sheet, increasing the density of the convex portion of the concavo-convex sheet, so compression resistance of the convex portion is improved, it is possible to make it difficult crushed protrusions.

A method of manufacturing a uneven sheet, in the width direction intersecting the transport direction of the sheet, is a method for producing uneven sheet and forming the uneven sheet having alongside a concavo-convex shape and a flat shape .
According to the manufacturing method of such uneven sheet can suppress the uneven sheet will extend strongly pulled and in the conveying direction, suppressing a decrease in height of the convex portion of the concavo-convex sheet and hardly crushed protrusions that can.

Further, while the outer peripheral surface of the rotating body sheet passes forming the uneven shape, heating said sheet, a mechanism for forming an uneven sheet having irregularities, the irregularities sheet having passed through the rotating body, the rotating a mechanism for feeding at a peripheral speed slower speed than the body, a manufacturing apparatus of the uneven sheet characterized by having a.
According to such a manufacturing apparatus of the uneven sheet, it is possible to weaken the tension applied to the uneven sheet having passed through the rotating body, or contract the uneven sheet extending on leaving from the rotating body, irregularities sheet is pulled strongly It may or suppressed that would extend in the conveying direction Te. Therefore, suppressing a decrease in height of the convex portion of the concavo-convex sheet, it can be difficult to collapse the protrusions.

=== First Embodiment ===
<< uneven sheet >>
Figure 1A is a side view of the uneven sheet 1 as viewed from the width direction of the first embodiment, FIG. 1B is a plan view of the uneven sheet 1, Fig. 1C, the uneven sheet 1 continuously and thickness directions is a cross-sectional view taken in FIG. 1D is a sectional view taken along irregularities sheet 1 in the width direction and the thickness direction. In the following description, the uneven sheet 1, the three directions perpendicular to each other, "continuous direction" irregularities sheet 1 is continuous, the "width direction", and referred to as "thickness direction".

Uneven sheet 1 of the first embodiment, as shown in FIGS. 1C and 1D, the first sheet 2 which is uneven shaped, both sides are bonded to the surface in the thickness direction one side of the second sheet 3 flat and a sheet of two-layer structure. Specifically, the convex portion 4 and the recess 5 is formed on the surface of the first sheet 2 thickness direction one side, and the first sheet 2 the second sheet 3, the recess 5 of the first sheet 2, partially is bonded (heat-sealed) to. The first convex portion 4 of the seat 2 is a quadrangular pyramid shape, the inside of the convex portion 4 has a hollow 4a, the cavity 4a is exposed on the surface of the other thickness direction side of the first sheet 2 are doing.

Further, as shown in FIG. 1B, the convex portion 4 (white-painted portion), and a recess 5 (crosshatched portion) together with alternating along the continuous direction, alternating even along the width direction. That is, the recess 5, both the continuous direction, and is surrounded in four directions of both the width direction at the convex portion 4. 1B, the length of the continuous direction of the concave portion 5 is shorter than the length of the continuous direction of the convex portion 4, a part of the convex portion 4 adjacent in the width direction are joined.

The shape and arrangement of the protrusions 4 and recesses 5 is not limited to that shown in FIG. For example, the planar shape of the protrusions 4 and recesses 5, a circle or square, may be rhomboid, etc., may also be discretely arranged projections 4 in a curved shape. Further, to the convex portion 4 with each other may be partially bonded, around the convex portion 4 may be completely surrounded by the recess 5. It is also possible to provide a recess 5 having different depths, in other words, it may be provided with different protrusions 4 heights. In addition, it may be uneven sheet 1 on both sides and has a concave-convex shape. As the first sheet 2 and second sheet 3 constituting the concave-convex sheet 1, a nonwoven fabric or plastic film comprising a thermoplastic resin fibers.

Such uneven sheet 1, for example, and is used as a topsheet of an absorbent article of the pet sheet and the like used sanitary napkins and disposable diapers, in animal excretion process. In this case, since it is possible to reduce the contact area between the user and the topsheet (uneven sheet 1), or to soften the skin, can be to enhance the breathability. In particular, as shown in FIG. 1B, by enclosing the recess 5 in the convex portion 4, excrement high viscosity unlikely to be transmitted into the sheet (menstrual blood and loose stool) uptake into the recess 5, it is possible to suppress the spread of the excrement . However, not limited to the use of the uneven sheet 1 as a surface sheet, the uneven sheet 1, for example, may be used as the second sheet between the top sheet and the absorber. Further, the uneven sheet 1, for example, may be used to mask or cleaning sheet or the like.

<< method of manufacturing the uneven sheet >>
Figure 2 is an explanatory view of a manufacturing apparatus 10 of the uneven sheet 1 in the first embodiment. Figure 3A is an explanatory view of the uneven sheet 1 immediately after fed from the first embossing roller 18a, FIG. 3B is an explanatory view of the uneven sheet 1 fed from the rate adjustment conveyor 21. In this specification, the case of producing a continuous sheet 1 of the uneven sheet 1 from the first continuous sheet of the continuous sheet and the second sheet 3 of the sheet 2 listed examples, not limited thereto, the first sheet 2, the second sheet 3 and, the uneven sheet 1 may be a sheet cut into a predetermined length.

The manufacturing apparatus 10 of the uneven sheet 1 of the first embodiment, a plurality of guide rollers 11a ~ 11e defining the transport path of the first sheet 2 and second sheet 3, a first roll first sheet 2 is wound from R1 and first feed roller 12 for feeding the first sheet 2, and the second feed roller 13 to the second sheet 3 is fed out of the second sheet 3 from the second roll R2 wound, a first tension measuring roller 14, a second tension measuring roller 15, the first speed adjustment roller 16 of the pair, a pair of second speed adjustment roller 17, a pair of embossing rollers 18 (mechanism of forming the uneven sheet), and the bonding roller 19, the support conveyor a 20, a speed adjustment conveyor 21.

First tension measuring roller 14, winding guide rollers 11a, the first sheet 2 between 11b, the force received from the first sheet 2, measuring the guide rollers 11a, the first tension of the seat 2 between 11b. Similarly, the second tension measuring roller 15, guide rollers 11c, the tension of the second sheet 3 between 11d measures.

A pair of first speed adjustment roller 16 (16a, 16b) is driven to rotate by the rotation-axis along the first width direction of the sheet 2, while sandwiching the first sheet 2 in the thickness direction, the first sheet 2 a 1 speed V1 (m / min), a pair of rollers for feeding the conveying direction downstream side (nip rollers). Incidentally, both rollers 16a, 16b is may be a drive roller, one the other hand the drive roller may be a driven roller. In addition, given the "m / min" as an example of the unit, but not limited to this. Similarly, a pair of second speed adjustment rollers 17 (17a, 17b) is driven to rotate by the rotation-axis along the width direction of the second sheet 3, while sandwiching the second sheet 3 in the thickness direction, the second sheet 3, at a second speed V2 slower than the first speed V1 (m / min), a pair of rollers for feeding the conveying direction downstream side (V1> V2).

A pair of embossing rollers 18 (18a, 18b) includes a first embossing roller 18a that rotates the rotary shaft around along the widthwise direction of the first sheet 2 and second sheet 3, and a second embossing roller 18b. First, second embossing roller 18a, each outer peripheral surface of the 18b, depending on the roughness shape to shape the first sheet 2, the convex portions 181 and concave portions 182 are formed, a convex first embossing roller 18a the parts 181 and recesses 182, protrusions 181 and recesses 182 of the second embossing roller 18b has a shape to mesh with each other. The first, second embossing roller 18a, a heater 183 is provided in each interior of the 18b, the outer peripheral surface is heated. Further, the first embossing roller 18a, by a suction mechanism (not shown), and can adsorb the first sheet 2 to the outer peripheral surface.

Bonding roller 19 is a roller that rotates around the rotation axis along the width direction of the first sheet 2 and second sheet 3, the position of the downstream side than the engagement position of the pair of embossing rollers 18, the first It is provided opposite to the embossing roller 18a. Further, the inside of the joining roller 19 heater 191 is provided, the outer peripheral surface is heated.

The pair of embossing rollers 18, and the temperature of the outer circumferential surface of the joining roller 19, a temperature below the melting point of the constituting material of the first sheet 2 and second sheet 3. The first, second embossing roller 18a, may be at least one of the 18b is long is heated, also, at least one of the first embossing roller 18a and the bonding roller 19 has only to be heated.

Supporting conveyor 20 includes a plurality of rollers 201 which rotates the rotation shaft around along the widthwise direction of the uneven sheet 1, a belt 202 wound around a plurality of rollers 201 have, the uneven sheet 1 downstream side to convey to. Speed ​​adjustment conveyor 21 is provided in the downstream side than the support conveyor 20, a plurality of rollers 211 which rotates the rotation shaft around along the widthwise direction of the uneven sheet 1, a belt 212 is provided inside the belt 212 and a suction box 213, a suction conveyor having a. The belt 212 is provided with a through hole penetrating in the thickness direction, unevenness sheet 1 on the belt 212, while attracted to the belt 212 by suction from the suction box 213, and is conveyed toward the downstream side in the conveying direction. The speed adjustment conveyor 21, the uneven sheet 1, at a slower than the first speed V1 and the second velocity V2 third speed V3 (m / min), and sends to the downstream side in the conveying direction (V1> V2> V3).

In the manufacturing apparatus 10 of the asperities sheet 1, first, the first feed roller 12, from the first roll R1 first sheet 2 is fed, the first sheet 2, the guide rollers 11a, first tension measuring roller 14, guide It is conveyed while being wrapped in order to roller 11b. At this time, as the first sheet 2 is transported at a predetermined tension to the first speed adjustment roller 16 of the pair, the control unit of the manufacturing apparatus 10 of the uneven sheet 1 (not shown), the first tension measurement roller 14 based on the first sheet 2 tension obtained, it controls the first feeding amount of the sheet 2 from the first feed roller 12. In the present embodiment, the first tension of the sheet 2 conveyed to the pair of first speed adjustment roller 16, low tension as possible first sheet 2 is conveyed without slack, specifically, the first sheet 2 to set the tension per unit width (50 mm) in the range of 1 ~ 3N but not limited thereto.

The first sheet 2 that is adjusted to a predetermined tension, by a pair of first speed adjustment roller 16, at a first speed V1, and is conveyed to between a pair of embossing rollers 18. Therefore, the control unit controls the peripheral speed Va (m / min) of the pair of first speed adjustment roller 16 (typically controlled as a peripheral speed Va of the conveying speed V1 and the rollers of the sheet is substantially the same value that).

On the other hand, the second sheet 3 is also a second feed roller 13 is fed from the second roll R2, the guide rollers 11c, a second tension measuring roller 15, is conveyed while being wrapped in order to guide rollers 11d, predetermined tension (present in the form, the same tension) and the first sheet 2, is controlled so as to be conveyed to a pair of second speed adjustment roller 17. Thereafter, the second sheet 3, a pair of second speed adjustment roller 17, at a second speed V2 slower than the first speed V1 (m / min), is conveyed to between the first embossing roller 18a and the bonding roller 19 that. Therefore, the control unit, the peripheral speed Vb (m / min) of the pair of second speed adjustment roller 17, controlled to be slower than the peripheral speed of the pair of first speed adjustment roller 16 Va (m / min) to.

Then, since each outer circumferential surfaces of the pair of embossing rollers 18 are heated, the first sheet 2 passing between a pair of embossing rollers 18, while being softened, engagement shape of the pair of embossing rollers 18, i.e., It is shaped into a concave-convex shape. The first sheet 2 which is uneven shaped is in a state of being adsorbed along the uneven shape of the outer peripheral surface of the first embossing roller 18a, is transported between the first embossing roller 18a and the bonding roller 19.

Moreover, because it is also heated the outer peripheral surface of the first embossing roller 18a and the bonding roller 19, between the first embossing roller 18a and the bonding roller 19, the first sheet 2 and second sheet 3 is superposed, heated by being clamped in a state softened by are bonded (heat-sealed). Specifically, the first portion of the sheet 2 supported on the protrusions 181 of the first embossing roller 18a, that is, a portion of the first sheet 2 which is a recess 5 of the uneven sheet 1, and a second sheet 3, the first is nipped between the convex portion 181 of the embossing rollers 18a and the outer peripheral surface of the bonding roller 19, it is joined. Thus uneven sheet 1 is formed.

Uneven sheet 1 fed from the first embossing roller 18a and the joining roller 19, by the support conveyor 20, while the flat surface of the second sheet 3 side is supported from the lower side in the vertical direction, and is conveyed toward the downstream side in the conveying direction. Thereafter, uneven sheet 1, the speed adjustment conveyor 21, while the flat surface is supported from the lower side in the vertical direction, while attracted to the belt 212, the third speed V3 slower than the first speed V1 and the second velocity V2 (m in / min), it is conveyed to the conveying direction downstream side of the process.

In the first embodiment, first second speed of the sheet 2 that the first embossing roller 18a (the tip of the convex portion 181) conveys V2 (m / min), and the first embossing roller 18a joining roller 19 compared to the second speed V2 of the uneven sheet 1 (m / min) to send out, to increase the first speed V1 of the first sheet 2 conveyed between the pair of embossing rollers 18 (m / min), while the speed slowing the third speed V3 of the uneven sheet 1 adjusting conveyor 21 feeds (V1> V2> V3). Therefore, the control unit, the peripheral speed Vb (m / min) of the first embossing roller 18a (the tip of the convex portion 181), and, as compared with the peripheral speed Vb (m / min) of the bonding rollers 19, a pair of first 1 peripheral speed Va (m / min) of the speed adjustment roller 16 becomes faster, the peripheral speed of the belt 212 of the speed adjustment conveyor 21 Vc (m / min) is controlled to be slower (Va> Vb> Vc).

Incidentally, the peripheral speed Vb of the second embossing roller 18b is equal to the peripheral speed Vb of the first embossing roller 18a. Further, the second speed V2 of the second sheet 3 that is transported between the first embossing roller 18a and the bonding roller 19 (m / min), the uneven sheet 1 first embossing roller 18a and the bonding roller 19 sends out second equal to the speed V2 (m / min), the peripheral speed of the pair of second speed adjustment roller 17 Vb a (m / min), the peripheral speed of the first embossing roller 18a (the tip of the convex portion 181) Vb (m / min ), and, equal to the circumferential velocity of the joining roller 19 Vb (m / min).

As described above, in the manufacturing method of the concave-convex sheet 1 of the first embodiment, the first embossing roller 18a outer circumferential surface forms a concave-convex shape (rotor) between the first sheet 2 (sheet) passes, the first heating the sheet 2, forming irregularities sheet 1 having an uneven shape. Therefore, uneven sheet 1 fed from the first embossing roller 18a is softened by heating, the tension and applied on leaving from the first embossing roller 18a, the tension during transportation, extending in the conveying direction (continuing direction) It has become easier. In particular, if the irregularities sheet 1 on the outer peripheral surface of the first embossing roller 18a is adsorbed, tension on the concavo-convex sheet 1 when away from the first embossing roller 18a is increased.

Therefore, if the speed of the uneven sheet 1 speed adjustment conveyor 21 feeds and would be more than the speed of the uneven sheet 1 first embossing roller 18a sends out, it applied to the uneven sheet 1 when away from the first embossing roller 18a or is conveyed in the state in which uneven sheet 1 is extended by the tension is conveyed uneven sheet 1 strongly pulled and uneven sheet 1 will be or further extended. With such uneven sheet 1 is stretched in the conveying direction, decreases the height of the convex portion 4 of the uneven sheet 1 (thickness), protrusions 4 becomes easy to collapse.

Therefore, in the first embodiment, the speed adjustment conveyor 21 (conveying mechanism), the uneven sheet 1 which has passed through the first embossing roller 18a, the first embossing roller 18a speed Vc slower than the peripheral speed Vb of the (rotor) in the transport. In other words, than the peripheral speed Vb of the first embossing roller 18a, a slower peripheral speed Vc of the belt 212 of the speed adjustment conveyor 21 (Vb> Vc), the first embossing roller 18a (the tip of the convex portion 181) is transported than the speed of the uneven sheet 1 V2 for feeding, speed adjustment conveyor 21 slows the speed V3 of the uneven sheet 1 to feed and transport (V2> V3). Note that the peripheral speed of the rotating member in the present invention, the tip portion of the convex portion of the outer peripheral surface of the rotary body forming the uneven shape, i.e., is the maximum diameter portion of the peripheral speed of the rotating body.

In doing so, the peripheral speed of the speed adjustment conveyor 21 as compared with the case where more than the peripheral speed of the first embossing roller 18a, weaken the tension on the concavo-convex sheet 1 between the speed adjustment conveyor 21 and the first embossing roller 18a be able to.
Therefore, as shown in FIG. 3A, the elongation unevenness sheet 1 immediately after fed from the first embossing roller 18a, as shown in Figure 3B, is deflated, it can be returned to the natural state. As a result, the height h2 of the convex portion 4 of the uneven sheet 1 fed from the rate adjustment conveyor 21, to be higher than the height h1 of the convex portion 4 of the uneven sheet 1 immediately after fed from the first embossing roller 18a can.
Moreover, the speed adjustment conveyor 21 is transported pulled strongly uneven sheet 1, uneven sheet 1 can be prevented thereby further extended. Therefore, suppressing a decrease in the height of the projections 4 of the uneven sheet 1.
Thus, according to the manufacturing method and a manufacturing apparatus 10 of the uneven sheet 1 of the first embodiment, it is possible to be suppressed to decrease the height of the projections 4 of the uneven sheet 1, hardly crushed protrusions 4. Further, by suppressing the elongation of the conveying direction of the uneven sheet 1, the width variation of the unevenness the seat 1 can be suppressed.

Incidentally, as compared with the peripheral speed Vb of the first embossing roller 18a, when slowing the peripheral speed Vc of speed adjustment conveyor 21, the length of the uneven sheet 1 first embossing roller 18a sends out per unit time (e.g., FIG. 3A L1 ) compared to the length of the uneven sheet 1 speed adjustment conveyor 21 feeds per unit time (e.g., L2 in FIG. 3B) is shortened. However, as described above, since the uneven sheet 1 that extends immediately after fed from the first embossing roller 18a is contracted, the deposition of uneven sheet 1 between the first embossing roller 18a and speed adjustment conveyor 21 occurs Absent. In other words, as uneven sheet 1 does not accumulate, the amount of shrinkage of uneven sheet 1 in accordance with (the return amount to the natural state), may be set the peripheral speed difference between the first embossing roller 18a and speed adjustment conveyor 21.

In the first embodiment, the speed adjustment conveyor 21 (conveying mechanism) is suction conveyor, the uneven sheet 1 which has passed through the first embossing roller 18a, the speed Vc slower than the peripheral speed Vb of the first embossing roller 18a in the transport. Therefore, for example, can be difficult to collapse, the convex portion 4 of the uneven sheet 1 compared to the case of adjusting the speed of the uneven sheet 1 by the pair of nip rollers sandwiching the uneven sheet 1.

Moreover, the speed adjustment conveyor 21, the uneven sheet 1 heated during the passage of the first embossing roller 18a, by suction adsorbed to the belt 212, can be cooled. By thus an uneven sheet 1 which has passed through the first embossing roller 18a to cool, it is possible to solidify quickly irregularities of the uneven sheet 1, can be a convex portion 4 hardly more collapsed.

On the other hand, the support conveyor 20, without suction adsorption irregularities seat 1 to the belt 202, which only supports a lower side in the vertical direction. Therefore, uneven sheet 1, on the belt 202 of the support conveyor 20, can be relaxed tension, you can return to the natural state contract and as shown in Figure 3B. Thus, during the speed adjustment conveyor 21 and the first embossing roller 18a, by providing the conveyor and is supported conveyor 20 for conveying while shrinkable supporting the uneven sheet 1, uneven sheet 1 to the speed adjustment conveyor 21 allowing time for uneven sheet 1 is contracted before supplying, also in the uneven sheet 1 contraction can be suppressed uneven sheet 1 slackens due to its own weight.

Incidentally, in order to facilitate uneven sheet 1 contracts on the support conveyor 20, in this embodiment, the peripheral speed Vc of the support conveyor 20, equal to the peripheral speed Vc of speed adjustment conveyor 21. But not limited to, the circumferential speed of the support conveyor 20 is a peripheral speed Vc or more speed adjustment conveyor 21, the circumferential speed less than Vb of the first embossing roller 18a. Further, it may be a manufacturing apparatus of the uneven sheet 1 having no support conveyor 20.

Further, in this embodiment, as shown in FIG. 2, the supporting conveyor 20 and, speed adjustment conveyor 21, to support the flat surface of the uneven sheet 1. Thus, the flat surface of the uneven sheet 1, by facing to the belt 212 of the belt 202 and the speed adjustment conveyor 21 of the support conveyor 20, can be a convex portion 4 of the uneven sheet 1 hardly more collapse. However, not limited to this, the uneven surface of the uneven sheet 1, may be opposed to the belt 212 of the belt 202 and the speed adjustment conveyor 21 of the support conveyor 20.

Further, the speed adjusting conveyor 21 is a suction conveyor, not only to cool the uneven sheet 1, before supply to the speed adjustment conveyor 21, the uneven sheet 1 may be cooled. In doing so, hardened faster uneven shape of the uneven sheet 1, it is possible to make it difficult crushed projections 4, also can promote the contraction of the uneven sheet 1 by cooling. Therefore, for example, the belt 202 of the support conveyor 20 or cooled with cold water or the like, the supporting conveyor 20 is also an uneven sheet 1 contraction so as not to inhibit the uneven sheet 1 by or to be sucked adsorption, support conveyor 20 But the uneven sheet 1 can be cooled. Other, and outer peripheral surface is cooled, a cooling roller for conveying the uneven sheet 1 while contacting the unevenness sheet 1, apart from the supporting conveyor 20, be provided between the first embossing roller 18a and speed adjustment conveyor 21 good.

In the first embodiment, the first embossing roller 18a be between the first sheet 2 passes, after forming the uneven shape on the first sheet 2, the first embossing roller 18a and the bonding roller 19 (in other de rotator), a first sheet 2 the second sheet 3 and (other sheets) nipped by joining, forming irregularities sheet. In this way, by the uneven sheet 1 in the sheet of two-layer structure, uneven sheet 1 layered (i.e., the first concave-convex sheet only sheet 2 which is uneven shaped) as compared with, the extended uneven sheet 1 it is unlikely it can be a convex portion 4 hardly more collapsed. Incidentally, the first sheet 2 and second sheet 3 is not limited to bonding by thermal fusion, for example, or adhesively bonded, may or joined by ultrasonic bonding.

In the first embodiment, the first speed adjustment roller 16 of the pair of the first sheet 2 is supplied to the first embossing roller 18a, than the peripheral speed Vb of the first embossing roller 18a (the tip of the convex portion 181) fast speed (peripheral speed) conveyed with Va (Vb <Va). That is, the first length of the sheet 2 supplied per unit time to the first embossing roller 18a, the length of the uneven sheet 1 first embossing roller 18a (the tip of the convex portion 181) dispatches per unit time (uneven longer than the length of the first sheet 2) in the shaped state. Therefore, the first sheet 2 so folded into irregular shape with a margin, increased density of the components of the convex portion 4, it is possible to improve the compression resistance of the convex portion 4. Therefore, even when the convex portion 4 is compressed in use or the like of the concavo-convex sheet 1, it is possible to make it difficult crushed protrusions 4.

=== Second Embodiment ===
Figure 4 is an explanatory view of a manufacturing apparatus 10 of the uneven sheet 1 in the second embodiment. In the first embodiment (FIG. 2), is equal to the peripheral speed Vb and the peripheral speed Vb of the first embossing roller 18a of the pair of second speed adjustment roller 17. In contrast, in the second embodiment, the second speed adjust rollers 17 of the pair is, the second sheet 3 supplied to the junction roller 19 (other rotating body) (the other sheet), the first embossing roller 18a ( circumferential speed slower speed than Vb of the tip) of the protrusion 181 (peripheral speed) conveyed by Vd (Vb> Vd).

In this case, than the length of the uneven sheet 1 first embossing roller 18a (the tip of the convex portion 181) dispatches per unit time (second sheet 3), the second sheet 3 supplied per unit time to the joining roller 19 If the length is shortened. Therefore, in the second embodiment, as compared with the first embodiment, takes the tension in the second sheet 3 to be supplied to the joining roller 19, in a state where the second sheet 3 is extended in the conveying direction, the first sheet 2 It is joined to. Therefore, after the uneven sheet 1 is fed from the first embossing roller 18a, the supporting conveyor 20 choice, the tension of the second sheet 3 is reduced, the second sheet 3 is contracted, the uneven sheet 1 of the convex portion 4 height increases. Specifically, among the second sheet 3, a portion not bonded to the first sheet 2, i.e., to the site of the bottom of the convex portion 4 is contracted, since the height of the convex portion 4 is increased, collapse the protrusions 4 it can be hard.

=== Third Embodiment ===
Figure 5 is an explanatory view of a manufacturing apparatus 10 of the uneven sheet 1 in the third embodiment. In the third embodiment, in place of the speed adjustment conveyor 21 in FIG. 2, by a pair of speed adjusting roller (nip roller) 22 sandwiching the uneven sheet 1, the uneven sheet 1 which has passed through the first embossing roller 18a, the first embossing peripheral speed Vb slower than the speed of the roller 18a (circumferential speed) conveyed by Vc. In this case, it is possible to make it difficult crushed the protrusions 4 of the uneven sheet 1.

However, when an uneven sheet 1 is softened immediately after fed from the first embossing roller 18a will sandwiching a pair of speed adjusting roller 22, there is a possibility that the convex portion 4 collapses. Therefore, an interval between the first embossing roller 18a and a pair of speed adjusting roller 22 irregularities sheet 1 is cooled, in a state where the uneven shape solidified, so that uneven sheet 1 is fed to a pair of speed adjusting roller 22 better to. Therefore, in the third embodiment, since the uneven sheet 1 between the first embossing roller 18a and a pair of speed adjusting roller 22 is easily loosened, in particular, it is preferable to provide a support conveyor 20.

=== Fourth Embodiment ===
6A and 6B are explanatory views of the uneven sheet 1 of the fourth embodiment. In the first embodiment have been given the uneven sheet 1 having a two-layer structure as an example, not limited to this and may be uneven sheet 1 of 1-layer structure. For example, as shown in FIG. 6A, the interior of the convex portion 4 has a hollow 4a, the cavity 4a is, may be uneven sheet 1 exposed at the opposite surface to the formed side of the convex portion 4 and, as shown in FIG. 6B, the surface in the thickness direction one side is the uneven surface is a surface of the other side is flat surface, good internal protrusions 4 even uneven sheet 1 not become hollow.

7 is an explanatory view of a manufacturing apparatus 10 of the uneven sheet 1 shown in Figure 6A. In the manufacturing apparatus 10, the first sheet 2 fed from the pair of first speed adjustment roller 16, between the pair of embossing rollers 18 (i.e., while passing through the first embossing roller 18a), is heated, uneven is shaped into a shape, uneven sheet 1 is formed. Thereafter, uneven sheet 1 is fed from a pair of embossing rollers 18, the supporting conveyor 20 and, by speed adjustment conveyor 21, is conveyed toward the downstream side in the conveying direction. In this case, than the peripheral speed Vb of the first embossing roller 18a, by slowing the peripheral speed Vc of speed adjustment conveyor 21, can be difficult to collapse the protrusions 4 of the uneven sheet 1.

Incidentally, uneven sheet 1 shown in FIG. 6B, for example, be formed by the outer peripheral surface of the second embossing roller 18b on a flat surface. Moreover, far, although an example in which forming irregularities sheet 1 by the pair of embossing rollers 18 (rotating body), is not limited thereto. For example, the rotating body peripheral surface forms a concave-convex shape while passing through the sheet such as a fibrous web, blowing hot air on the sheet, by shaping by along the sheet to the uneven shape of the rotating body, the uneven sheet 1 it may be formed.

=== fifth embodiment ===
Figure 8 is an explanatory view of the uneven sheet 1 of the fifth embodiment. Uneven sheet 1 of the first embodiment (FIG. 1B), but irregularities are formed on the entire area in the width direction, not limited to this, as shown in FIG. 8, the conveying direction (continuing direction) of the concave-convex sheet 1 and in a width direction intersecting, it may be uneven sheet 1 having alongside a concavo-convex shape and a flat shape.

For such uneven sheet 1, in the portions as flat shape of irregularities, different thickness, since it takes how tension during conveyance are different, so as not to cause wrinkles, usually strongly pulled It would be conveyed. However, if pulled strongly uneven sheet 1 is softened after passage of the first embossing roller 18a, uneven sheet 1 is stretched in the conveying direction, the height of the convex portion 4 is lowered. Therefore, if the irregularities sheet 1 lined with the uneven shape and a flat shape in the width direction, in particular, as in the embodiments described above, the uneven sheet 1 which has passed through the first embossing roller 18a, the peripheral speed of the first embossing roller 18a conveyed at a slower than speed, during which the uneven sheet 1 is cooled, it is preferable to solidify the uneven shape. Then, to refrain uneven sheet 1 will be pulled strongly suppress the reduction in height of the convex portion 4 can be hardly crushed protrusions 4.

In addition, in the case of uneven sheet 1 lined with the uneven shape and a flat shape in the width direction, further, as in the embodiments described above, the uneven sheet 1 was cooled at the suction conveyor or the like, or so that uneven compacted quickly, in uneven sheet 1 cooling, i.e., during the conveying weakening the tension, releasing the tension of the uneven sheet 1 with the support conveyor 20, or to allow transport by suppressing the generation of wrinkles it is preferred.

Above, the embodiments are intended to facilitate understanding of the present invention and are not to be construed as limiting the present invention. Further, the present invention without departing from its spirit, together can be changed and improved, it is needless to say the present invention includes equivalents thereof.

1 uneven sheet, 2 a first sheet (sheet), 3 second sheet (other sheets), 4 protrusions, 4a cavity 5 recess, R1 first roll, R2 second roll, 10 uneven sheet manufacturing apparatus, 11a ~ 11e guide roller, 12 a first feed roller, 13 a second delivery roller, 14 a first tension measuring roller, 15 second tension measuring roller, 16 a pair of first speed adjustment roller 17 a pair of second speed adjustment roller 18 a pair of embossing rollers, 18a first embossing roller (rotating member), 18b a second embossing roller (another rotary member), 181 protrusion, 182 recess, 183 heater, 19 joining roller, 191 a heater, 20 a support conveyor (conveyor) , 201 roller, 202 belt, 21 speed adjustment conveyor (conveying mechanism, the suction conveyor ), 211 roller, 212 belt, 213 suction box, 22 a pair of speed adjusting roller (conveying mechanism)

Claims (9)

  1. And the outer circumferential surface of the rotating body forming the uneven shape while the sheet passes, heating the sheet to form an uneven sheet having an uneven shape,
    And carry the said uneven sheet having passed through the rotating body, at a peripheral speed slower speed than the rotary body,
    Method for producing uneven sheet characterized by having a.
  2. A manufacturing method of the concave-convex sheet according to claim 1,
    It said uneven sheet having passed through the rotating body, transfer mechanism for transferring at a peripheral speed slower than the speed of the rotating body, the manufacturing method of the uneven sheet, which is a suction conveyor.
  3. A manufacturing method of the concave-convex sheet according to claim 1 or claim 2,
    Said uneven sheet that has passed through the rotating body, a transfer mechanism for transferring at a peripheral speed slower speed than the rotary body, between said rotary member, a conveyor for conveying while the uneven sheet shrinkable supported method for producing uneven sheet, characterized in that is provided.
  4. A concave-convex sheet manufacturing method as claimed in any one of claims 3,
    Method for producing uneven sheet characterized by cooling the uneven sheet that has passed through the rotating body.
  5. A concave-convex sheet manufacturing method as claimed in any one of claims 4,
    A while the rotating body is the sheet passes, after forming the uneven shape on the seat, between the rotating body and the other of the rotating body, by joining nipped between the sheet and another sheet the method of the uneven sheet and forming the uneven sheet.
  6. A manufacturing method of the concave-convex sheet according to claim 5,
    Method for producing uneven sheet, characterized in that for conveying the other said other sheet supplied to the rotating body, at a peripheral speed slower speed than the rotor.
  7. A concave-convex sheet manufacturing method as claimed in any one of claims 6,
    Method for producing uneven sheet, characterized in that for conveying the said sheet to be supplied to the rotating body, at a peripheral speed faster speed than the rotor.
  8. A concave-convex sheet manufacturing method as claimed in any one of claims 7,
    Method for producing uneven sheet, characterized in that in the width direction intersecting the transport direction of the sheet to form the uneven sheet having alongside a concavo-convex shape and a flat shape.
  9. The rotating body peripheral surface forms a concave-convex shape while the sheet passes, heating the sheet, a mechanism for forming an uneven sheet having an uneven shape,
    A mechanism for feeding the said uneven sheet having passed through the rotating body, at a peripheral speed slower speed than the rotary body,
    Apparatus for producing uneven sheet characterized by having a.
PCT/JP2014/079101 2014-10-31 2014-10-31 Textured sheet manufacturing method and textured sheet manufacturing apparatus WO2016067462A1 (en)

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JP2015510528A JP5771765B1 (en) 2014-10-31 2014-10-31 Method for producing uneven sheet, and, the uneven sheet manufacturing apparatus
PCT/JP2014/079101 WO2016067462A1 (en) 2014-10-31 2014-10-31 Textured sheet manufacturing method and textured sheet manufacturing apparatus
CN201480083075.9A CN107073805B (en) 2014-10-31 2014-10-31 And a method of manufacturing apparatus for manufacturing the concavo-convex irregularities sheet sheet

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CN107073805A (en) 2017-08-18

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