JP2021133128A - Press method and press device - Google Patents

Abstract

To provide a press method for improving the moldability of a recess in a mat body.SOLUTION: A press method includes a pre-press step S10 of pressing a mat body having a recess recessed in a thickness direction as a whole in the thickness direction, and a post-press step S20 of pressing the recess of the mat body pressed in the pre-press step in the thickness direction. In the post-press step, the recess is pressed to make it deeper, the recess is pressed in a tapered shape that tapers more at a distal end part in a pressing direction than a base end part in the pressing direction, the recess is pressed to widen the opening of the recess, the recess is widened less at the distal end part than the base end part, and a bottom part of the recess is pressed without expanding it.SELECTED DRAWING: Figure 6

Description

The present invention relates to a method and an apparatus for pressing a mat-shaped processing object.

As one of the methods for manufacturing absorbent articles such as diapers and sanitary napkins, a process of pressing a mat-shaped object to be processed in the thickness direction is known. Examples of the object to be pressed by this processing include a mat-like member on which constituent materials are deposited and a mat-like body such as a laminated body in which a sheet is superposed on the member.
By pressing the mat body by the above processing, it is possible to improve the shapeability such as preventing the mat body from losing its shape and maintaining its shape. In order to enhance such morphology, a technique of pressing the laminated body provided with the recesses as a whole has been proposed (see Patent Document 1).

Japanese Patent No. 6108598

However, when the mat body provided with the recess is pressed as a whole only once as described above, the depth of the recess may be insufficient due to other processing such as cutting or laminating after the pressing. It may cause shape loss. Alternatively, even when the mat body is pressed flatly, this pressing process may cause insufficient depth of the recess or loss of shape.
Therefore, there is room for improvement in improving the moldability of the recesses in the mat body.

The pressing method and the pressing apparatus disclosed here have been devised in view of the above-mentioned problems, and one of the purposes is to improve the formability of the recesses in the mat body. Not limited to this purpose, it is also possible that the actions and effects derived from each configuration shown in the “mode for carrying out the invention” described later and which cannot be obtained by the conventional technique are exhibited. It can be positioned as another purpose.

The pressing methods disclosed here include a pre-pressing step of pressing the mat body having recesses recessed in the thickness direction as a whole in the thickness direction, and a pre-pressing step of pressing the recesses of the mat body pressed in the pre-pressing step to the thickness. It is equipped with a post-pressing process of pressing in a direction.
The press device disclosed here includes a front press portion that presses the mat body having a recessed recess in the thickness direction as a whole in the thickness direction, and the recess of the mat body pressed by the front press portion to have the thickness. It is provided with a rear press portion that presses with a convex portion in the direction.

According to the disclosed pressing method and pressing device, the moldability of the concave portion in the mat body can be improved.

It is a perspective view which shows typically the cross section which partially broke the urine pad. It is a schematic diagram of the CD direction view which shows the main part of the apparatus which manufactures a urine pad. It is a schematic diagram which shows the TD direction cross section of MD direction view in the main part of the front part (front press part). In FIG. 3, only the outer shape of the laminated body (mat body) to be pressed is shown. It is a schematic diagram which shows the TD direction cross section of the MD direction view in the main part of the rear part (rear press part). In FIG. 4, only the outer shape of the laminated body to be pressed is shown. It is a schematic diagram which shows the cross section in the TD direction of the laminated body to be pressed. In FIG. 5, only the outer shape of the laminated body is shown. It is a flowchart explaining a pressing method. It is a schematic diagram which shows the modification of FIG.

The pressing method and the pressing apparatus as an embodiment will be described.
The object to be pressed by these methods and devices is a mat-like member having a recess (hereinafter referred to as a "mat body").

Here, a mat body provided on the absorbent article will be illustrated as a press target. Specifically, a urine pad is given as an example of an absorbent article. As a semi-finished mat body provided on the urine pad, an absorber or a laminated body in which a sheet is superposed on the absorbent body is exemplified. By providing the recesses in these laminates, the fit of the urine pad to the wearer can be improved, and the water absorption can be improved by diffusing the excrement from the wearer.
In the pressing method and the pressing apparatus of the present embodiment, the recesses provided in the laminated body to be conveyed are pressed, so that the moldability of the recesses is improved.

In the following embodiments, the directions used in the description are defined as follows.
In the description of the urine pad, three directions of the longitudinal direction, the width direction and the thickness direction are used. The longitudinal and width directions are along the plane on which the urine pads extend and are orthogonal to each other. The thickness direction is a direction orthogonal to both the longitudinal direction and the width direction.
Regarding the thickness direction, when the urine pad is attached to the wearer, the side facing the wearer's skin is the skin surface side (one of the thickness directions), and the opposite side of the skin surface side is the non-skin surface side (thickness direction). The other).

In the description of the press device, three directions of MD direction (Machine Direction), CD direction (Cross Direction), and TD direction (Transverse Direction) are used.
The MD direction is the direction in which the laminated body is conveyed. The CD direction is a direction orthogonal to the MD direction. These MD directions and CD directions are also directions along the plane on which the laminated body to be conveyed extends. The TD direction is a direction orthogonal to both the MD direction and the CD direction.

[I. One Embodiment]
In one embodiment described below, the configuration will be described in item [1], and the actions and effects of the configuration in item [1] will be described in subsequent items [2].
[1. composition]
In this item [1], the urine pad provided with the laminated body to be pressed will be described in the sub-item [1-1], and then the press device will be described in the sub-item [1-2]. Then, the pressing method will be described in the sub-item [1-3].

[1-1. Urine pad]
As shown in FIG. 1, various sheets 5 to 8 are superposed on the absorber 2 on the urine pad 1.
The core 3 of the absorber 2 is wrapped with a wrap sheet 4.

The core 3 is a mat-like member on which constituent materials are deposited. For the core 3, a material in which a crushed or defibrated pulp (so-called “fluff pulp”) is mixed with a super absorbent polymer (also referred to as “SAP <Super Absorbent Polymer>”) is used. The core 3 has a function of absorbing and retaining urine excreted from the wearer wearing the urine pad 1.
The wrap sheet 4 is a sheet-like encapsulating member that covers the core 3 from both the skin surface side and the non-skin surface side. A thin film material such as a non-woven fabric or a tissue is used for the wrap sheet 4. Here, a wrap sheet 4 composed of two sheets, an upper sheet 4U covering the skin surface side of the core 3 and a lower sheet 4L covering the non-skin surface side of the core 3 will be illustrated.

The center sheet 5 is superposed on the skin surface side with respect to the absorber 2, and the side sheet 6 is arranged on the outer side in the width direction of the center sheet 5.
The back sheet 7 is superposed on the non-skin surface side of the absorber 2, and the cover sheet 8 is superposed on the non-skin surface side of the back sheet 7.
The center sheet 5 has water permeability because it allows water to permeate and be absorbed by the absorber 2. Further, the center sheet 5 is arranged on the skin surface side of the urine pad 1 (for this reason, it is also referred to as a "top sheet").

The side sheet 6 has impermeable property in order to prevent leakage to the outside in the width direction. Further, the side sheet 6 is arranged on the skin surface side of the urine pad 1. The portion of the side sheet 6 inside in the width direction is not attached to other members and has a free end arranged on the skin surface side of the center sheet 5.
Further, the back sheet 7 has impermeable property in order to prevent leakage from the absorber 2.

The cover sheet 8 covers the absorber 2 and the sheets 5, 6 and 7 from the non-skin surface side. The cover sheet 8 is provided to reinforce the back sheet 7 and improve the tactile sensation. The cover sheet 8 is not limited to a single-layer structure, and may have a multi-layer structure having an inner cover sheet and an outer cover sheet.

The urine pad 1 on which the sheets 5 to 8 are superposed on the absorber 2 is provided with a groove 9 (recess) extending in the longitudinal direction at the center in the width direction.
The groove 9 is a portion in which a recess recessed from the skin surface side to the non-skin surface side extends in the longitudinal direction. The groove 9 is recessed in at least the core 3. Here, a groove 9 in which the wrap sheet 4 and the center sheet 5 are arranged along the recess of the core 3 is illustrated. Further, a groove 9 having a tapered shape that tapers from the skin surface side to the non-skin surface side will be given as an example.

Here, the content of the highly water-absorbent resin in the absorber 2 differs for each region with respect to the groove 9. Specifically, the bottom region R ₁ below is set to have a smaller content of the highly water-absorbent resin than the side region R _{2 below.}
-Bottom area R ₁ : Area on the non-skin surface side with respect to the bottom 9B of the groove 9-Side area R ₂ : Area outside in the width direction with respect to the side portion 9C of the groove 9.

Hereinafter, among the urine pads 1 provided with the grooves 9, the semi-finished product of only the absorber 2 is referred to as the first laminated body 24 (mat body), and the semi-finished product of the laminated absorber 2 of the center sheet 5 is referred to as the first laminated body 24 (mat body). It is referred to as a second laminated body 29 (mat body).
These laminates 24 and 29 are manufactured by the apparatus described below.

[1-2. Press equipment]
As shown in FIG. 2, the urine pad 1 manufacturing apparatus includes a foam part 20 (foam part) and a press part 34 (press part,) for manufacturing the laminated bodies 24 and 29 which are sequentially conveyed by the conveyor mechanism 10. Press device) is provided.

The thickness direction of the laminated bodies 24 and 29 to be conveyed is along the TD direction. Here, the laminated bodies 24 and 29 having a posture in which the longitudinal direction is along the MD direction are conveyed, and the width direction is along the CD direction. However, the laminated bodies 24 and 29 may be transported in a posture in which the longitudinal direction is along the CD direction, and in this transport posture, the width direction is along the MD direction.
In this manufacturing apparatus, since the constituent member of the urine pad 1 described above is a semi-finished product in the middle of manufacturing, each configuration described in item [1-1] is described with the same name, and then the laminated body 24 Each configuration except, and 29 is marked with "'".

--Form part--
The foam part 20 is a part that forms the first laminated body 24.
The foam part 20 is provided with a duct 21 for supplying the constituent material of the core 3'and a forming drum 22 on which the constituent material supplied from the duct 21 is deposited on the outer periphery.

In the duct 21, an opening is arranged at a downstream end portion 21a arranged so as to cover a part of the outer circumference of the forming drum 22 (the outer peripheral edge portion on the upper right in FIG. 2). The duct 21 has a shape that is widened toward the downstream end portion 21a, and is also referred to as a “skirt”.
The inside of the duct 21 is supplied with crushed or defibrated pulp or a highly water-absorbent resin. Inside the duct 21, a constituent material in which a highly water-absorbent resin is mixed with the dispersed pulp is blown toward the forming drum 22 by an air flow.

The forming drum 22 is a rotating body that forms a core 3'with constituent materials deposited on the outer circumference thereof by sucking the pulp and the highly water-absorbent resin supplied from the duct 21 toward the inner circumference side. A mold having a shape corresponding to the approximate shape of the core 3'is provided on the outer periphery of the forming drum 22, and pulp and highly water-absorbent resin stacked inside the mold are formed as the core 3'. Will be done.

Here, a core 3'provided with a groove 9'is formed, and a core 3'in which the bottom region R ₁ ′ has a smaller content of a highly water-absorbent resin than the side region R _{2 ′ is manufactured.}
For example, by using a masked mold at a portion corresponding to the groove 9', a core 3'provided with the groove 9'is formed. Further, by supplying more highly water-absorbent resin from the duct 21 to the outside than the inside in the CD direction reference, the amount of the highly water-absorbent resin contained in the bottom region R _{1 ′ is suppressed rather than the side region R 2 ′.} It is possible.

Here, at the lower part of the forming drum 22, the core 3'is delivered and placed on the strip-shaped lower sheet 4L'to be conveyed. Then, the upper sheet 4U'is laminated along the groove 9'on the skin surface side of the core 3'.
The first laminated body 24 produced in this manner is press-processed by the press part 34 described below.

--Press part--
The press part 34 is provided with the following front press part 30 (hereinafter abbreviated as "front part 30", front press unit) and rear press part 40 (hereinafter abbreviated as "rear part 40", rear press unit). ing.
-Front part 30: Part that presses the first laminated body 24 as a whole-Rear part 40: Part that partially presses the second laminated body 29

The rear part 40 is provided on the downstream side in the MD direction from the front part 30, and the center sheet 5'(not shown) is laminated on the first laminated body 24 between the front part 30 and the rear part 40. In addition, other processing (not shown) such as cutting processing and laminating processing may be performed between the front part 30 and the rear part 40.
As shown in FIG. 3, the front part 30 presses the first laminated body 24 in a plane without following the groove 9'. On the other hand, in the rear part 40, as shown in FIG. 4, the second laminated body 29 is partially pressed along the groove 9'.

The laminates 24 and 29 pressed in the front part 30 and the rear part 40 are in the following three states.
-Pre-state: State before press working in the front part 30-Intermediate state: State after press working in the front part 30 and before pressing in the rear part 40-Post-state: After pressing in the rear part 40 Status

As shown in FIG. 5, the laminated bodies 24 and 29 have different cross-sectional shapes (cross-sectional shapes in the thickness direction) in each of the front state, the intermediate state, and the rear state.
Since the first laminated body 24 is entirely pressed in the front part 30 and transitions from the previous state to the intermediate state, the overall thickness dimension (thickness direction) of the first laminated body 24 is larger in the intermediate state than in the previous state. Dimension) becomes smaller. Regarding the groove 9', the thickness dimension D ₁ (first dimension) in the intermediate state is smaller than _{the thickness dimension D 0 in the previous state.}

Since the groove 9'in the second laminate 29 is partially pressed in the rear part 40 to transition from the intermediate state to the posterior state, the groove 9'in the second laminate 29 is more in the posterior state than in the intermediate state. The thickness dimension (so to speak, depth) becomes large.
In addition, the groove 9'described here has a square groove shape in which the width dimension (dimension along the width direction) is constant regardless of the position in the thickness direction in the front state and the intermediate state. In the rear state, it forms a tapered shape in which the width dimension decreases from the skin surface side to the non-skin surface side.

As shown in FIG. 2, the front part 30 and the rear part 40, which press the laminated bodies 24 and 29 in the above three states, are the rolls 3P, 3A, 4P that rotate at a speed corresponding to the transfer speed of the conveyor mechanism 10. , 4A are provided.
The front part 30 is provided with the following rolls 3P and 3A for pressing the first laminated body 24, and the rear part 40 is provided with the following rolls 4P and 4A for pressing the second laminated body 29.

-Flat roll 3P: A roll that presses the first laminated body 24 on a flat outer peripheral surface-Anvil roll 3A: A roll that serves as a pedestal for press working with a flat roll 3P-Press roll 4P: A roll that serves as a pedestal for pressing with a convex portion 50. Roll for pressing groove 9'-Anvil roll 4A: Roll that serves as a pedestal for press working with press roll 4P

The convex portion 50 is attached to the press roll 4P in a state of projecting outward in the radial direction, and is arranged at a position corresponding to the groove 9'of the laminated bodies 24 and 29. Here, since the groove 9'extends along the MD direction, a convex portion 50 (so to speak, a "convex") extending along the circumferential direction of the press roll 4P is provided. The extending dimension of the convex portion 50 is set to be slightly shorter than the extending dimension of the groove 9'.
Hereinafter, the convex portion 50 of the press roll 4P will be described in detail with reference to FIG.

The convex portion 50 is formed so that its protruding dimension D _{2 (second dimension) is larger than the thickness dimension D 1} (see FIG. 5) of the groove 9'in the intermediate state _{(D 2} > D ₁ ).
The protruding dimension D ₂ is a dimension in which the convex portion 50 protrudes in the radial direction of the press roll 4P. Specifically, the dimension of the convex portion 50 that enters the second laminated body 29 in the intermediate state in the thickness direction is the protrusion dimension D ₂ . _{As described above, the protrusion dimension D 2} in which the tip portion 5T and the base end portion 5B in the pressing direction are separated from each other along the radial direction of the press roll 4P in the convex portion 50 is a groove in an intermediate state pressed by the convex portion 50. It is set larger than the thickness dimension D _{1 of 9'.}

Further, the base end portion 5B of the convex portion 50 is formed larger than the opening 9A'(see FIG. 5) in the groove 9'in the intermediate state. More specifically, the CD dimension (dimension in the CD direction) W _{2 at the base end portion 5B is set to be larger than the CD dimension W 1} (see FIG. 5) of the opening 9A'in the groove 9'in the intermediate state (see FIG. 5). W ₁ > W ₂ ).
On the other hand, the tip portion 5T of the convex portion 50 is formed smaller than the bottom portion 9B'(see FIG. 5) of the groove 9'in the intermediate state. More specifically, the CD dimension B ₂ at the tip 5T is set smaller than the CD dimension B ₁ (see FIG. 5) at the _{bottom 9B'in the groove 9'in the intermediate state (B 2} <B ₁ ). However, the tip portion 5T may have the same size as the bottom portion 9B'in the groove 9'in the intermediate state (B ₁ = B ₂ ).

Further, the convex portion 50 has a tapered shape in which the tip portion 5T is tapered more than the base end portion 5B. In other words, the dimension of the convex portion 50 along the axial direction of the press roll 4P is set smaller toward the outside along the radial direction of the press roll 4P.
In addition, the convex portions 50 are intermittently arranged with respect to the press roll 4P at intervals in the circumferential direction corresponding to the intervals between the grooves 9'of the second laminated body 29 which are sequentially conveyed. With such an intermittent arrangement, the press working of the groove 9'is continuously performed while the press roll 4P makes one rotation.

[1-3. Press method]
Next, with reference to FIG. 6, the pressing method by the above-mentioned press part 34 will be described.
In this pressing method, the pre-pressing step (step S10) is performed, and then the post-pressing step (step S20) is performed. Such a two-step (multi-step) pressing process is carried out in this pressing method.

The pre-pressing process is a press working process according to the pre-part 30. In this pre-pressing step, the first laminated body 24 provided with the groove 9'is pressed in the thickness direction as a whole.
The post-pressing process is a press working process by the post-part 40. After this, in the pressing step, the groove 9'of the second laminated body 29 is pressed in the thickness direction.

_{In the post-pressing step described above, steps 1 to 4 listed below are performed according to the configurations such as the dimensions D 1} and D ₂ described above in the description of the press part 34, the relative relationship between the sizes, and the tapered shape of the convex portion 50. Is carried out.
-Step 1: Press the groove 9'to make it deeper-Step 2: Press the groove 9'into a shape that is more tapered than the base end at the tip in the pressing direction-Step 3: Press the groove 9' Expand opening 9A'-Step 4: Press without expanding bottom 9B'of groove 9'

The configurations 1 to 4 corresponding to the above steps 1 to 4 are listed below. Note that the configuration 1 corresponds to the step 1, and similarly, the configurations 2 to 4 correspond to the steps 2 to 4.
-Structure 1: The protrusion dimension D ₂ is larger than the thickness dimension D ₁ of the groove 9'in the intermediate state.-Structure 2: The convex portion 50 forms a tapered shape.-Structure 3: The groove 9'in the intermediate state. The base end portion of the convex portion 50 rather than the width (CD dimension) of the opening 9A'
The width of 5B (CD dimension) is large.-Structure 4: The tip of the convex portion 50 is larger than the width (CD dimension) of the bottom 9B'of the groove 9'in the intermediate state.
5T width (CD size) is small

[2. Action and effect]
Since the press method and the press part 34 of the present embodiment are configured as described above, the following actions and effects can be obtained.
Since the first laminated body 24 is pressed as a whole in the pre-pressing step and the shallow groove 9'is pressed again in the post-pressing step, the formability of the groove 9'can be improved.
More specifically, even if the groove 9'becomes shallow or loses its shape after the press working in the pre-pressing process, the groove 9'with such reduced formability is pressed again in the post-pressing process. As a result, the shape of the groove 9'can be restored, and the moldability of the second laminated body 29 and thus the urine pad 1 can be improved.

Further, in the post-pressing step, the groove 9'is pressed to be deepened, so that the pressed groove 9'is deepened, and the formability of the groove 9'can be surely improved.
Further, since the groove 9'is pressed into a tapered tapered shape in the post-pressing process, the urine pad 1 may be provided with a tapered groove 9 whose width dimension decreases from the skin surface side to the non-skin surface side. can. According to the urine pad 1 provided with such a groove 9, it is possible to improve the diffusivity and water absorption of excrement from the wearer of the urine pad 1.

Since the opening 9A'of the groove 9'is expanded in the post-pressing step as described above, it is possible to surely suppress a decrease in moldability such that the opening 9A'of the groove 9'becomes smaller. From this point as well, the moldability of the groove 9'can be improved.
According to the urine pad 1 provided with the groove 9 expanded in this way, the excrement from the wearer is easily guided to the groove 9, which contributes to the improvement of water absorption.

Alternatively, since the bottom portion 9B'of the groove 9'is pressed without being expanded in the post-pressing step, the moldability can be improved while suppressing an excessive widening of the groove 9'.
By pressing the bottom portion 9B'in this way, the constituent material of the core 3'can be smoothly moved along with the molding to deepen the groove 9'and the molding into a tapered shape. In other words, the moldability of the groove 9'can be improved by providing a margin for the constituent material of the core 3'to move.

In addition, since _{the content of the highly water-absorbent resin in the bottom region R 1} is set to be smaller than that in the side region R ₂ , when the water from the groove 9 is absorbed by the core 3, _{the height in the bottom region R 1} is high. The swelling of the water-absorbent resin is suppressed. Therefore, the crushing of the groove 9 can be suppressed.
Regarding the density gradient of the highly water-absorbent resin in the above regions R ₁ and R ₂ , it can be said that the content of the highly water-absorbent resin is larger in the side region R _{2 than in the bottom region R 1, so that the water content from the groove 9 is the core.} When absorbed by 3, the swelling of the highly water-absorbent resin in _{the side region R 2 can be promoted.} As a result, if the side region R ₂ swells toward the skin surface side, the depth of the groove 9 can be secured.

Therefore, even when the urine pad 1 is excreted while being worn by the wearer, it is possible to suppress a decrease in the moldability of the groove 9.
The press part 34 can also be used to obtain the effects and effects of the above pressing method.

[II. others]
The above-described embodiment is merely an example, and there is no intention of excluding the application of various modifications and techniques not specified in this embodiment. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed and can be combined as appropriate.

The shape of the convex portion 50 is not limited to the above-mentioned shape, and various shapes can be adopted. Specifically, as shown in FIG. 7, a tapered convex portion 50 having a tip portion 5T having a smaller degree of taper than the proximal end portion 5B may be used. That is, the convex portion 50 may be used in which the base end portion 5B expands the groove 9'more than the tip end portion 5T. The "tapering degree" and "expanding degree" referred to here correspond to the angle at which the edge of the convex portion 50 is inclined with respect to the pressing direction. The smaller the tilt angle, the smaller the degree of tapering and the degree of expansion.
Further, the convex portion 50 provided with the uneven portion 5U which is uneven along the radial direction (thickness direction) of the press roll may be used. That is, a convex portion 50 that forms irregularities on the surface of the groove 9'may be used.

In the groove 9'pressed by the convex portion 50 having a stepwise tapered shape as described above, the movement of the constituent material of the core 3'is smaller on the non-skin surface side than on the skin surface side. According to such a groove 9', excrement is easily guided to the groove 9. Alternatively, the volume (amount) of the core 3 that absorbs the water of the excrement guided by the groove 9 as compared with the convex portion having a tapered shape (the convex portion that is not a stepwise tapered shape) having only a large degree of taper. Is also secured. Therefore, the unevenness formed on the surface of the groove 9 by the uneven portion 5U contributes to the improvement of diffusivity of excrement from the wearer and the improvement of water absorption. Therefore, it contributes to the improvement of the comfort of the wearer who wears the urine pad 1.

Alternatively, the portion to be pressed in the post-pressing step or the post-part is not limited to the recess extending like a groove, but may be a recess that is recessed without extending. In this case, the convex portion is provided without extending according to the shape of the concave portion. Further, a plurality of recesses may be provided in one urine pad. In this case, a convex portion is added at a location corresponding to the concave portion.
The convex portion is not limited to the form of being attached to the press roll, and may be attached to various base materials such as a plate material or a pillar having an arcuate bottom surface.

In addition, in the pre-pressing process or the press working by the pre-part, the laminate may be pressed along the uneven shape in the pre-state. That is, not only the concave portion may be pressed in the post-pressing process or the rear part portion, but also the concave portion may be pressed in the pre-pressing process or the front part portion. In this case, the deterioration of the moldability of the concave portion due to the press working in the pre-pressing process is suppressed, which contributes to the improvement of the moldability in the product state.

[III. Addendum]
The following additional notes are disclosed with respect to the above embodiments.
[Appendix 1]
A pre-pressing step of pressing the mat body having recesses recessed in the thickness direction as a whole in the thickness direction, and
A post-pressing step of pressing the concave portion of the mat body pressed in the pre-pressing step in the thickness direction, and a post-pressing step.
A pressing method characterized by being equipped with.
[Appendix 2]
The pressing method according to Appendix 1, wherein the post-pressing step is performed by pressing the concave portion to make it deeper.
[Appendix 3]
The pressing method according to Appendix 1 or 2, wherein the post-pressing step is characterized in that the tip end portion in the pressing direction presses the recess portion in a tapered shape that is tapered more than the base end portion in the pressing direction.
[Appendix 4]
The pressing method according to Appendix 3, wherein the post-pressing step is characterized in that the recess is pressed to widen the opening of the recess.
[Appendix 5]
The pressing method according to Appendix 4, wherein the post-pressing step is characterized in that the tip portion expands the recessed portion less than the base end portion.
[Appendix 6]
The pressing method according to any one of Supplementary note 3 to 5, wherein the post-pressing step presses the bottom portion of the recess without expanding the bottom portion.
[Appendix 7]
The pressing method according to any one of Supplementary note 1 to 6, wherein the post-pressing step is characterized in that the concave portion is pressed to form unevenness on the surface of the concave portion.
[Appendix 8]
A front press portion that presses the mat body having recesses recessed in the thickness direction as a whole in the thickness direction, and
A rear press portion that presses the concave portion of the mat body pressed by the front press portion with a convex portion in the thickness direction, and a rear press portion.
A press device characterized by being equipped with.
[Appendix 9]
The convex portion enters the mat body in the thickness direction of the mat body pressed by the front press portion, rather than the first dimension which is the dimension in the thickness direction of the concave portion before being pressed by the convex portion. The press device according to Appendix 8, wherein the second dimension, which is the dimension to be formed, is larger.
[Appendix 10]
The press device according to Appendix 8 or 9, wherein the convex portion has a tapered shape in which the tip portion in the pressing direction is tapered more than the base end portion in the pressing direction.
[Appendix 11]
The base end portion of the convex portion is larger than the opening of the concave portion before being pressed by the convex portion of the rear press portion in the mat body pressed by the front press portion. The press device described in.
[Appendix 12]
The press device according to Appendix 11, wherein the convex portion has a smaller degree of taper at the tip portion than at the base end portion.
[Appendix 13]
Addendum 10 characterized in that the tip portion is the same as or smaller than the bottom portion of the concave portion before being pressed by the convex portion of the rear press portion in the mat body pressed by the front press portion. The press device according to any one of 12 to 12.
[Appendix 14]
The press device according to any one of Appendix 8 to 13, wherein the convex portion has an uneven portion uneven in the thickness direction.

1 Urine pad 2 Absorber 3, 3'Core 4 Wrap sheet 4U, 4U' Upper sheet 4L, 4L' Lower sheet 5, 5'Center sheet 6 Side sheet 7 Back sheet 8 Cover sheet 9, 9'Groove (recess)
9A'Opening 9B, 9B' Bottom 9C Side 10 Conveyor mechanism 20 Foam part (foam part)
21 Duct 21a Downstream end 22 Drum 24 First laminated body (first mat body)
29 Second laminated body (second mat body)
30 Front part (front press part)
3P Flat Roll 3A Anvil Roll 34 Press Part (Press Equipment)
40 Rear part (rear press part)
4P press roll 4A anvil roll 50 convex part 5B base end part 5T tip part 5U unevenness B ₁ TD dimension of the bottom of the groove B ₂ TD dimension of the tip of the convex part D 0 thickness dimension of the groove _{9'in the previous state D 1} middle Thickness dimension of groove 9'in state (first dimension)
D ₂ protruding dimension (second dimension)
R ₁ Bottom area R ₂ Side area W ₁ Groove opening TD dimension W ₂ Convex base end TD dimension

Claims (8)

A pre-pressing step of pressing the mat body having recesses recessed in the thickness direction as a whole in the thickness direction, and
A post-pressing step of pressing the concave portion of the mat body pressed in the pre-pressing step in the thickness direction, and a post-pressing step.
A pressing method characterized by being equipped with. The pressing method according to claim 1, wherein the post-pressing step is performed by pressing the concave portion to make it deeper. The pressing method according to claim 1 or 2, wherein the post-pressing step is characterized in that the tip end portion in the pressing direction presses the recess portion in a tapered shape that is tapered more than the base end portion in the pressing direction. The pressing method according to claim 3, wherein the post-pressing step is characterized by pressing the recess to widen the opening of the recess. The pressing method according to claim 4, wherein the post-pressing step is characterized in that the tip portion expands the recessed portion less than the base end portion. The pressing method according to any one of claims 3 to 5, wherein the post-pressing step presses the bottom of the recess without expanding the bottom portion. The pressing method according to any one of claims 1 to 6, wherein the post-pressing step presses the concave portion to form unevenness on the surface of the concave portion. A front press portion that presses the mat body having recesses recessed in the thickness direction as a whole in the thickness direction, and
A rear press portion that presses the concave portion of the mat body pressed by the front press portion with a convex portion in the thickness direction, and a rear press portion.
A press device characterized by being equipped with.

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