TW202031472A - Method for manufacturing sheet member and device for manufacturing sheet member - Google Patents

Abstract

This method for manufacturing a sheet member (70), which is for an absorbent article and has a textile (40) and a fiber assembly (50) entangled with the textile (40), is characterized by having: an arranging step for arranging the fiber assembly (50) on at least one surface of the textile (40) that is continuous; and an entangling step for jetting a fluid toward the textile (40) and the fiber assembly (50) while the textile (40) and the fiber assembly (50) are being conveyed after the arranging step, and causing the fiber assembly (50) to be entangled with the textile (40), wherein the maximum length (W50) of the fiber assembly (50) in a CD direction that crosses the conveyance direction of the textile (40) and the fiber assembly (50) is no greater than the length (W40) of the textile (40).

Description

Method for manufacturing sheet member and manufacturing device for sheet member

The present invention relates to a method of manufacturing a sheet member and an apparatus for manufacturing a sheet member.

Patent Document 1 discloses the use of a non-woven composite low-density fabric in which a woven fabric and a non-woven fabric are intertwined in order to soften the feel of absorbent articles such as sanitary napkins and disposable diapers. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 11-170413

[The problem to be solved by the invention]

However, in the manufacturing process of the non-woven composite low-density fabric shown in Patent Document 1, because the fabric has a certain shape, in addition to stable transportation during transportation, the fibers constituting the non-woven fabric intertwined with the fabric are The material is light and does not have a certain shape, so it is easily affected by external influences such as during transportation. Therefore, there is a concern that the conveyance of the fibers constituting the nonwoven fabric is unstable compared with the woven fabric, and the fibers constituting the nonwoven fabric entangled with the woven fabric may not easily become uniform.

The present invention was developed in view of the above-mentioned problems, and the object is to transport the fiber assembly in a more stable state to manufacture a sheet member. [Technical means to solve the problem]

The main invention for achieving the above-mentioned object is a method for manufacturing a sheet member, which has a fabric and a fiber assembly in a state intertwined with the fabric for an absorbent article, and is characterized in that: The arranging step of arranging the fiber assembly on at least one surface side of the woven fabric; and after the arranging step, while conveying the woven fabric and the fiber assembly, spraying fluid toward the woven fabric and the fiber assembly to gather the fibers In the entanglement step of entanglement of the fabric and the fabric, the maximum length of the fiber assembly in the CD direction orthogonal to the conveying direction of the fabric and the fiber assembly is equal to or less than the length of the fabric. The other features of the present invention can be understood from the description in this specification and the attached drawings. [Effects of the invention]

According to the manufacturing method of such a sheet member, the fiber assembly can be conveyed in a more stable state.

[Forms for implementing invention]

According to the description in this manual and attached drawings, at least the following items are understood. A method for manufacturing a sheet member is a method for manufacturing a sheet member for an absorbent article having a fabric and a fiber assembly in a state intertwined with the fabric, characterized by having: on at least one surface of the continuous fabric The arrangement step of arranging the fiber assembly on the side; and after the arrangement step, while conveying the fabric and the fiber assembly, the fluid is sprayed toward the fabric and the fiber assembly to make the fiber assembly and the fabric intertwined. In the CD direction in which the fabric and the fiber assembly are orthogonal to the conveying direction, the maximum length of the fiber assembly is equal to or less than the length of the fabric.

According to the manufacturing method of such a sheet member, the fiber assembly can be conveyed in a more stable state.

Such a method of manufacturing a sheet member, wherein, in the aforementioned entanglement step, a certain conveying mechanism is used to convey the aforementioned fiber assembly at a certain conveying speed, and another conveying mechanism is used to transfer the aforementioned fiber assembly to the aforementioned certain conveying mechanism. It is expected that the aforementioned certain transport speed is higher than the aforementioned other transport speed.

According to the manufacturing method of such a sheet member, in the entanglement step, it is possible to reduce the concern about slackening of the fabric or uneven formation of fiber aggregates.

In such a method of manufacturing a sheet member, in the entanglement step, a plurality of times of fluid is sprayed toward the fabric and the fiber assembly at different positions in the conveying direction, and the pressure of the fluid sprayed on the upstream side of the conveying direction is at It is desirable that the pressure of the fluid injected on the downstream side in the conveying direction is not more than that.

According to the manufacturing method of such a sheet member, the fear that the fibers of the fiber assembly are blown away by the sprayed fluid can be alleviated, and the fabric can be more entangled with the fabric.

In the method of manufacturing such a sheet member, in the entanglement step, it is desirable to use a rotating body provided with a suction mechanism to convey the fabric and the fiber assembly.

According to the manufacturing method of such a sheet member, the fiber assembly can be conveyed in a more stable state.

In the manufacturing method of such a sheet member, it is desirable that, in the entanglement step, the fabric is brought into contact with the peripheral surface of the rotating body for conveyance.

According to the manufacturing method of such a sheet member, the fiber assembly can be conveyed in a more stable state, and entanglement can be performed.

Such a method of manufacturing a sheet member, wherein, in the entanglement step, the rotating body is a first rotating body, a second rotating body different from the first rotating body is provided, and the first rotating body is transported after being transported It is desirable that at least one of the woven fabric and the fiber assembly is in contact with the peripheral surface of the second rotating body for conveyance, and it is desirable that the peripheral speed of the second rotating body is equal to or higher than the peripheral speed of the first rotating body.

According to such a method of manufacturing a sheet member, it is possible to reduce the fear of slackening the fabric and fiber assembly while the first rotating body is entangled.

In such a method of manufacturing a sheet member, the second rotating body is provided with a suction mechanism, and it is desirable that the fluid is injected from the outside toward the inside in the radial direction of the second rotating body so that the fiber assembly and the fabric are entangled.

According to such a method of manufacturing a sheet member, it is possible to manufacture a sheet member in a state where more fiber aggregates and fabric are entangled.

In such a method of manufacturing a sheet member, the fiber assembly is conveyed at least toward the rotating body using a conveying conveyor belt, and the conveying surface of the conveying conveyor belt is provided below the center of rotation of the rotating body. It is desirable that between the conveyance by the belt and the conveyance by the rotary body, it is desirable to further have a passing step in which the fiber assembly passes through the closest position of the rotary body and the conveying conveyor belt.

According to the manufacturing method of such a sheet member, the fear of stagnation in the conveyance of the fiber assembly from the conveyance belt to the rotating body is reduced, and the fiber assembly can be stably conveyed.

In the manufacturing method of such a sheet member, it is desirable that in the conveyance by the conveying conveyor belt, the conveying conveyor belt does not convey the fabric, and it is desirable to have a supply step of supplying the fabric to the rotating body before the conveyance by the rotating body. .

According to the manufacturing method of such a sheet member, in the entanglement step after the woven fabric and the fiber assembly are conveyed in a stable state, respectively, the woven fabric and the fiber assembly are easily entangled in a stable state.

In the manufacturing method of such a sheet member, it is desirable that, in the supply step, the supply rotating body for the fabric is supplied so that the tension of the fabric is maintained constant and the fabric is supplied.

According to the manufacturing method of such a sheet member, it is easy to supply the fabric to the rotating body in a stable state.

In the manufacturing method of such a sheet member, it is desirable that the peripheral speed of the supply rotating body is equal to the peripheral speed of the rotating body, and the peripheral speed of the rotating body is a speed equal to or higher than the moving speed of the conveyor belt.

According to the manufacturing method of such a sheet member, it is easy to supply the fabric to the rotating body in a stable state, and the subsequent entanglement step can be performed in a stable conveying state.

Such a method of manufacturing a sheet member, wherein a conveying conveyor belt is used to convey the fiber assembly toward at least the rotating body, and the conveying surface of the conveying conveyor belt is set at the same height as the center of rotation of the rotating body, or more rotating In a position with a high center, it is desirable that the fiber assembly is conveyed upward along the rotation direction of the rotating body after starting the conveyance using the rotating body.

According to the manufacturing method of such a sheet member, the fabric and fiber assembly can be conveyed in a more stable state.

Such a method of manufacturing a sheet member, wherein, in the entanglement step, the fabric and the fiber assembly are conveyed by one of the rotating bodies, and after the rotating body is conveyed, the fabric and the fibers are conveyed by a downstream conveyer belt As for the assembly, it is desirable that the conveying speed of the downstream conveying belt is equal to or higher than the peripheral speed of the rotating body.

According to the manufacturing method of such a sheet member, the worry of slackening the fabric and the fiber assembly can be reduced while the rotating body is used for conveyance and entanglement.

In such a method of manufacturing a sheet member, the downstream conveying conveyor belt is provided with a suction mechanism, and while the downstream conveying conveyor belt is used to convey the fabric and the fiber assembly, fluid is sprayed toward the fabric and the fiber assembly to make It is desirable that the aforementioned fiber assembly and the aforementioned fabric are further entangled.

According to such a method of manufacturing a sheet member, it is possible to manufacture a sheet member in a state where more fiber aggregates and fabric are entangled.

A manufacturing apparatus for a sheet member is a manufacturing apparatus for a sheet member for an absorbent article having a fabric and a fiber assembly in a state intertwined with the fabric, characterized by having: on at least one surface of the continuous fabric The disposing part where the fiber assembly is arranged on the side; and after the fiber assembly is arranged, the fabric and the fiber assembly are transported, and fluid is sprayed toward the fabric and the fiber assembly to entangle the fiber assembly and the fabric The entanglement of the fabric and the fiber assembly in the CD direction orthogonal to the conveying direction, the maximum length of the fiber assembly is less than or equal to the length of the fabric.

According to the manufacturing apparatus of such a sheet member, the fiber assembly can be conveyed in a more stable state.

===Implementation form=== <The structure of sanitary napkin 1> Hereinafter, the absorbent article of the present invention will be described with a sanitary napkin as an example, but it is not limited to this, such as secretion sheets, urine absorbent pads, disposable diapers, etc. The absorbent article can also be applied.

Fig. 1 is a plan view of a sanitary napkin 1 (hereinafter also referred to as "sanitary napkin 1") viewed from the skin side. Fig. 2 is a plan view of the sanitary napkin 1 viewed from the non-skin side. Fig. 3 is a cross-sectional view taken along line X-X in Fig. 1. The sanitary napkin 1 has a front-rear direction, a width direction, and a thickness direction orthogonal to each other. In the front-rear direction, the side that abuts the lower abdomen of the wearer is called the front side, and the side that abuts the buttocks is called the back side. In the thickness direction, the side contacting the wearer is called the skin side, and the opposite side is called the non-skin side.

As shown in FIGS. 1, 2 and 3, the sanitary napkin 1 has a pair of side sheets 5, a top sheet 3, an absorber 2, and a back sheet 4 laminated in this order from the skin side in the thickness direction. The surface sheet 3 and the absorber 2 are joined to each other by a well-known joining means such as a hot melt adhesive. The surface sheet 3 and the back sheet 4 have a larger plane size than the absorber 2 and cover the entire plane of the absorber 2. In addition, the top sheet 3, the back sheet 4, and the side sheet 5 laminated on each other are joined to each other via an outer peripheral sealing portion 8 along the outer peripheral edge of the sanitary napkin 1. The pair of side sheets 5 are provided on both sides in the width direction, are arranged on the skin side of the surface sheet 3 along the front-rear direction, and are joined to the surface sheet 3 using a well-known adhesive means or fusion means.

The sanitary napkin 1 has a pair of wings 6 extending from a central area in the front-rear direction of the sanitary napkin 1 toward both outer sides in the width direction. The wing portion 6 is formed by a side sheet 5 and a back sheet 4 extending outward from both sides in the width direction of the front sheet 3. In addition, the sanitary napkin 1 may be in a form without the wings 6.

The non-skin side of the sanitary napkin 1 (the non-skin side of the back sheet 4) is provided with an adhesive area 11 coated with an adhesive. When the tampon 1 is used, the adhesive area 11 is adhered to the skin side of the underwear or the like, and the sanitary napkin 1 is fixed to the underwear or the like. The shape and number of the adhesive area 11 can be changed arbitrarily.

Similarly, the non-skin side of each wing 6 (the non-skin side of the back sheet 4) is provided with an adhesive region 12 for the wing. When using the sanitary napkin 1, the wing adhesive region 12 is adhered to the non-skin side of the underwear or the like, and the sanitary napkin 1 is fixed to the underwear or the like. The shape and number of the wing adhesive regions 12 can be changed arbitrarily.

The surface sheet 3 is liquid-permeable and is composed of a fabric 40 and a fiber assembly 50. The back sheet 4 may be formed of a liquid-impermeable and moisture-permeable plastic film, a liquid-impermeable non-woven fabric, laminated sheets of these, and the like. For the side sheet 5, a well-known nonwoven fabric can be used.

The absorber 2 is a member that absorbs excrement such as menstrual blood and holds it inside, and includes an absorbent core 10 that absorbs liquid, and a liquid-permeable core-cladding sheet 20 that covers the entire absorbent core 10. The absorbent core 10 is formed into a predetermined shape by adding a superabsorbent polymer (so-called SAP) as a liquid-absorbent granular material to pulp fibers, cellulose-based absorbent fibers, etc., which are liquid-absorbent fibers. The core-cladding sheet 20 is a liquid-permeable sheet, and can exemplify tissue paper, air-laid and the like.

＜Structure of surface sheet 3＞ FIG. 4 is a partially enlarged view of the surface sheet 3 when viewed from the skin side, and FIG. 5 shows a state where the surface sheet 3 is separated into a woven fabric 40 and a fiber assembly 50. As shown in FIGS. 4 and 5, the surface sheet 3 is a sheet member in which the fibers of the fabric 40 and the fiber assembly 50 are intertwined (the fabric 40 and the fiber assembly 50 are intertwined) to form an integrated sheet member. The manufacturing method of the sheet member 70 which entangles the woven fabric 40 and the fiber assembly 50 is mentioned later.

As shown in FIG. 4, the fabric 40 is composed of constituent yarns 41 woven into a lattice shape. The constituent yarn 41 has a plurality of warp yarns 42 and a plurality of weft yarns 43 intersecting with the warp yarns 42. They are formed by crossing each other in the thickness direction to form a plurality of weaves surrounded by the warp yarns 42 and the weft yarns 43 as penetrating areas. Item 45. The constituent yarn 41 of the fabric 40 is a twisted yarn formed by twisting a raw yarn formed of cotton yarn (cotton fiber). In addition to cotton fibers, the raw yarn is suitably used cellulose fibers such as natural cellulose fibers such as hemp and pulp fibers, regenerated cellulose fibers such as rayon, and semi-synthetic cellulose fibers such as acetate. As for the cotton yarn used in the raw yarn, it is ideal to use a cotton yarn with a thickness of 10-100. The fabric 40 mainly made of cotton material or the like is used for the surface sheet 3, so that the wearer can obtain a comfortable skin touch, and skin problems are unlikely to occur. In addition, the weaving method of the woven fabric 40 is not limited to a plain weave that is woven into a lattice shape, and a well-known weaving method such as twill weave, satin weave, and rib weave can be appropriately used.

The fiber assembly 50 is a collection of fibers formed by well-known manufacturing methods such as a dry method in which the short fibers are carded in a certain direction by a carding machine using a spunbond method using long fibers, and the fibers are arranged to form a fiber web. The body is formed into the state of the previous stage of the non-woven fabric. In addition, the fiber assembly 50 is formed of constituent fibers 51 containing hydrophilic fibers. The constituent fibers 51 are a soft and light material, and are aggregates that are gathered irregularly. Hydrophilic fibers include, for example, regenerated cellulose fibers such as rayon and fibrillated rayon, natural cellulose fibers such as cotton and ground pulp, and semi-synthetic cellulose such as acetate. In addition, the fiber assembly 50 is not limited to the fiber assembly 50 formed by the carding method using a carding machine, and the fiber assembly 50 formed by methods such as an air forming method, a wet method, a spunbond method, and a meltblown method may be used. The fiber density of the fiber assembly 50 is, for example, 2.8 to 3.5×10 ^-3 g/cm ³ , and the basis weight (weight per unit area) is, for example, 20 to 70 g/m ² . The thickness of the fiber assembly 50 is, for example, 7 to 20 mm, and the fiber length of the fiber assembly 50 is, for example, 1 to 100 mm. In addition, the fineness of the fiber assembly 50 is set to, for example, 0.1 to 6 dtex.

<The manufacturing method of the sheet member 70 of the first embodiment> The fabric 40 in a continuous state is produced, and the fiber assembly 50 manufactured by the fiber assembly manufacturing device (not shown) is intertwined to form a sheet member 70 in an integrated continuous state, and the sheet in a continuous state is applied The member 70 is carded into a predetermined shape to form the surface sheet 3. In addition, in the following description, the woven fabric 40 and the sheet member 70 will be described in a continuous state.

FIG. 6 is a diagram schematically showing a part of the manufacturing apparatus 100 used in the method of manufacturing the sheet member 70 according to the first embodiment. The manufacturing apparatus 100 is an apparatus for manufacturing a sheet member 70 in which the fiber assembly 50 and the fabric 40 are intertwined and integrated. The manufacturing apparatus 100 includes from the upstream side in the conveying direction: an upstream conveying device 130, a first rotating body 150 and a first spraying device 300, a second rotating body 160 and a second spraying device 400, a downstream conveying device 140, and a dehydrating device 250. Cutting device 500. The manufacturing apparatus 100 conveys the fabric 40 and the fiber assembly 50 in the conveyance direction, and the direction orthogonal to the conveyance direction is called "CD direction".

＜＜The first transportation step＞＞ The first conveying step is a step of conveying at least the fiber assembly 50 using the upstream conveying device 130. The upstream conveyor 130 includes an upstream conveyor 130a (also referred to as a "conveyor belt"). The upstream conveyance belt 130a is a conveyance part that conveys the fabric 40 and the fiber assembly 50 along a predetermined conveyance path. First, the fiber assembly 50 is placed in a state where the fiber assembly 50 is in contact with the upstream conveyor belt 130a, and then the fabric 40 is placed thereon, that is, the fiber assembly 50 is placed on the fabric on the upstream conveyor belt 130a. In the state on the lower side of 40, it is conveyed in the conveying direction. The step of arranging the fiber assembly 50 on at least one surface side of the woven fabric 40 is also referred to as "arrangement step".

At this time, the length of the woven fabric 40 in the CD direction is greater than the length of the fiber assembly 50 in the CD direction (W40≧W50), and the length of the woven fabric 40 in the CD direction is more preferably longer than the length of the fiber assembly 50 in the CD direction (W40 ＞W50). FIG. 7 is a diagram schematically showing the woven fabric 40 and the fiber assembly 50 in the first step. In FIG. 7, although the woven fabric 40 and the fiber assembly 50 are shown in a separated state for convenience, the woven fabric 40 is stacked from above the fiber assembly 50 in the first conveying step. The fabric 40 and the fiber assembly 50 in FIG. 7 and the like are schematic diagrams, and the thickness of each constituent yarn 41 of the fabric 40, the size of the weave 45, the number of fibers of the fiber assembly 50, the length of the fibers, etc. are not necessarily correct. The fiber assembly 50 is a soft and light linear material, and its outer shape is not fixed because it is gathered irregularly. Therefore, the length of the fiber assembly 50 in the CD direction is the maximum length of the fiber assembly 50 in the CD direction. In addition, in the following description, "the length of the fiber assembly 50 in the CD direction" means the maximum length of the fiber assembly 50 in the CD direction.

When the upstream conveying belt 130a is viewed in a plan view, it is conveyed in a state where the fabric 40 covers substantially the entire area of the fiber assembly 50. Since the fiber assembly 50 is a soft and light material, it is susceptible to the influence of surrounding conditions and the environment, which may change the conveying speed or cause uneven fibers to be conveyed. Assuming that the length (W40) in the CD direction of the fabric 40 is set to be shorter than the length (W50) in the CD direction of the fiber assembly 50 (W40<W50), then the fiber assembly is placed on the upstream conveyor belt 130a 50 has a region where the fabric 40 is placed on the fiber assembly 50 and a region where the fabric 40 is placed on the fiber assembly 50. In this case, the fiber assembly 50 in the region where the fabric 40 is placed is covered by the fabric 40, and the degree of freedom is restricted. On the other hand, since the fiber assembly 50 in the region where the fabric 40 is not placed is not limited in the degree of freedom, the fibers of the fiber assembly 50 may move. That is, in the region where the fibers of the fiber assembly 50 are not easily moved, and the region where the fibers of the fiber assembly 50 are easy to move, there is a concern that the fiber density of the fiber assembly 50 or the amount of fibers to be transported may change. In this regard, the fiber assembly 50 is transported in a state in which the fabric 40 covers substantially the entire area of the fiber assembly 50. Therefore, the fiber assembly 50 is easily transported in the same stable state in the substantially entire area of the fiber assembly 50, thereby enabling The fibers of the fiber assembly 50 are in a uniform state. In addition, from the first conveyance step to the cutting step before the cutting process, the fabric 40 is conveyed while maintaining the relationship that the length W40 of the woven fabric 40 in the CD direction is longer than the length W50 of the fiber assembly 50 in the CD direction.

The conveying surface of the upstream conveying belt 130a is provided below the center C150 of the first rotating body 150, and the first rotating body 150 is arranged above the upstream conveying device 130. The upstream conveyor belt 130a and the outer peripheral surface 150a of the first rotating body 150 have portions facing each other. The portion where the upstream conveying belt 130a and the outer peripheral surface 150a of the first rotating body 150 face each other is the position where the upstream conveying device 130 and the first rotating body 150 are closest. In addition, a second rotating body 160 is arranged above the first rotating body 150.

When the fabric 40 and the fiber assembly 50 are delivered to the first rotating body 150 from the upstream conveying device 130, the fabric 40 and the fiber assembly 50 are passed through the gap between the opposing upstream conveyor belt 130a and the outer peripheral surface 150a. That is, it passes through the closest position of the upstream conveying device 130 and the first rotating body 150 (passing step). Thereby, it is sandwiched between the upstream conveyor belt 130a and the outer peripheral surface 150a. The fabric 40 and the fiber assembly 50 that are crushed in the thickness direction have a thinner thickness of the fiber assembly 50, and the fibers can be stabilized. Thereby, the fear that the fiber can be moved and the fiber density of the fiber assembly 50 will vary is reduced.

＜＜The second transport step＞＞ The second conveying step is a step in which the fiber assembly 50 and the woven fabric 40 conveyed in the first conveying step are further conveyed by the rotation of the first rotating body 150, and the fibers of the fiber assembly 50 and the woven fabric 40 are intertwined. The step of entanglement of the fibers of the fiber assembly 50 and the fabric 40 is also referred to as "entanglement step". The woven fabric 40 and the fiber assembly 50 in an entangled state are referred to as a sheet 60. The sheet 60 shows a state from a state where at least a part of the fiber assembly 50 is entangled with the woven fabric 40 to a state where the cutting process is performed in a cutting step described later. In FIG. 6, the sheet 60 and the sheet member 70 are indicated by diagonal lines toward the lower right.

In the second conveying step, the fabric 40 is conveyed in a state in which the outer peripheral surface 150a of the first rotating body 150 is in contact, and it is preferable to convey the fiber assembly 50 at the outermost side with respect to the conveying surface. In addition to the light and high degree of freedom of the fibers of the fiber assembly 50, the fabric 40 has a predetermined fixed shape in a plane by the woven constituent yarns 41, and it is easy to work in a more stable state of the fiber assembly 50. Transport. Therefore, the fabric 40 is brought into contact with the outer peripheral surface 150a as the transport surface, and the fiber assembly 50 is transported with the fabric 40 interposed therebetween, and the fabric 40 and the fiber assembly 50 are easily transported in a stable state.

Using the first rotating body 150, the woven fabric 40 and the fiber assembly 50 whose length in the CD direction of the woven fabric 40 has a relationship with the length of the fiber assembly 50 in the CD direction are transported with the woven fabric 40 in contact with the outer peripheral surface 150a, On the outer peripheral surface 150a, almost all of the fiber assembly 50 is transported via the fabric 40, so that the fibers of the fiber assembly 50 are easily transported stably in a uniform state. The fiber assembly 50 is conveyed in a stable state, and the entanglement process can be performed in a stable state.

In addition, as shown in FIG. 6, if there is a gradient in the conveying path during the conveying from the first conveying step to the second conveying step, the upstream conveying device 130 is directed toward the fabric 40 and the fiber assembly 50 of the first rotating body 150. During the delivery, there is a concern that the conveyance of the fiber assembly 50, which is light and has a high degree of freedom, may stagnate or the fiber density may change. In this regard, the fabric 40 is transported while contacting the outer peripheral surface 150a. If the fiber assembly 50 is transported on the outermost side with respect to the transport surface, it is lifted from the bottom to the top along the arc of the first rotating body 150 The fiber assembly 50 is conveyed in the same manner, so that the outermost surface of the fiber assembly 50 with respect to the conveying surface, the outer surface of the fiber assembly 50 (the surface opposite to the side opposite to the fabric 40) is not restricted, but is free It is transported in a high degree. Furthermore, the fibers of the fiber assembly 50 are easily spread while being conveyed along the conveying direction. As a result, the first spray device 300 is used to spray high-pressure water f on the fiber assembly 50 that is more spread out of the fibers of the fabric 40, and the fibers of the fiber assembly 50 are easily formed with respect to the fabric 40 so that the fibers of the fiber assembly 50 are uniformly intertwined. Furthermore, it is possible to easily reduce the unevenness of the fibers of the fiber assembly 50 generated in the sheet member 70 after the manufacture.

In the transport from the first transport step to the second transport step, it is desirable that the peripheral speed of the first rotating body 150 is higher than the moving speed of the upstream conveying belt 130a, and the peripheral speed of the first rotating body 150 is higher than that of the upstream conveying belt 130a. Fast moving speed is more ideal. Suppose that when the peripheral speed of the first rotating body 150 is slower than the moving speed of the upstream conveyor belt 130a, there may be a problem of the fabric 40 slack in the upstream conveyor 130, or the fiber assembly 50 placed on the fabric 40 Conveying is also stagnant, and there is a concern about deviation in fiber density. In order to prevent this, the peripheral speed of the first rotating body 150 is set to be higher than the moving speed of the upstream conveyor belt 130a, and the fabric 40 is conveyed with appropriate tension. As a result, the fiber assembly 50 can be easily conveyed in the conveying direction. status. In addition, the formation of the fiber assembly 50 is easy to convey, and it is easy to reduce the worry of uneven fiber density.

FIG. 8 is a diagram schematically showing a cross section of the first rotating body 150. The outer peripheral surface 150a of the first rotating body 150 continuously drives and rotates in the circumferential direction Dc2 (for example, in the counterclockwise direction) with the horizontal axis C150 as the center of rotation. In addition, the circumferential direction Dc2 is also the conveying direction, and the CD direction and the circumferential direction Dc2 are orthogonal. The first rotating body 150 has a substantially cylindrical shape, and a plurality of suction holes 151 are provided on its peripheral surface. The inner peripheral side and the outer peripheral side of the first rotating body 150 communicate with each other via the suction hole 151 so that liquid and gas can pass therethrough.

The first rotating body 150 includes a suction mechanism. A cylindrical partition wall 152 is provided on the inner peripheral side of the first rotating body 150 coaxially with the first rotating body 150. On the inner peripheral side of the first rotating body 150, the ring-shaped substantially closed space SP is sequentially divided into a first area SP1, a second area SP2, and a third area by a plurality of partition walls 153, 153, 153 in the circumferential direction Dc1 SP3. The first area SP1 and the second area SP2 on the upstream side are maintained at a negative pressure state that is lower than the outside air pressure. The third area SP3 is at the same pressure as the outside air pressure, or is a combination of the first area SP1 and the second area SP2 and the outside air pressure. The air pressure value between. The first area SP1 and the second area SP2 are set in a negative pressure state, and while sucking and holding the fabric 40 and the fiber assembly 50, the sprayed water f is sucked toward the inner peripheral side. In addition, the rotation of the first rotating body 150 refers to a state where the outer peripheral surface 150a is rotated, and the cylindrical partition wall 152 and the partition walls 153, 153, and 153 are each fixed.

The first injection device 300 is provided on the outer side of the first rotating body 150 in the radial direction. The first spray device 300 includes spray nozzles 301 and 302 in this order from the upstream side in the conveying direction. The first spray device 300 sprays water f on the fabric 40 and the fiber aggregate 50 held on the outer peripheral surface 150 a of the first rotating body 150 from the outside in the radial direction of the first rotating body 150.

The spray nozzles 301 and 302 are respectively arranged at different positions in the conveying direction. Since the basic structures of the spray nozzles 301 and 302 are almost the same, the spray nozzle 302 will be described below. FIG. 9A is a diagram schematically showing the injection nozzle 302. FIG. 9B is a diagram schematically showing a configuration example of the injection hole of the injection nozzle 302. 9A shows that the first rotating body 150, the spray nozzle 302, the woven fabric 40, and the spray nozzle 301 other than the fiber assembly 50 are omitted.

The spray nozzle 302 is arranged perpendicular to the outer peripheral surface 150a of the first rotating body 150, and sprays water f toward the first rotating body 150 at a high pressure. As shown in FIGS. 9A and 9B, the member 301a of the injection nozzle 302 facing the outer peripheral surface 150a is provided with a plurality of injection holes 301b arranged in a straight line and at a constant pitch parallel to the CD direction. The water f sent from the side opposite to the first rotating body side of the spray nozzle 302 is sprayed from the plurality of spray holes 301b to the entire CD direction of the fabric 40 and the fiber assembly 50. The hole diameter of the injection hole 301b is set to, for example, 50 to 200 μm, and the distance between the centers of the injection hole 301b adjacent to the CD direction is set to, for example, 0.2 to 2.0 mm.

In the first spray device 300, it is desirable that the pressure of the water f sprayed on the upstream side (the spray pressure of the water flow) is lower than the pressure sprayed on the downstream side, and it is more desirable that the spray pressure of the water flow on the upstream side is higher than that of the water flow on the downstream side. The injection pressure is small. Specifically, the spray pressure of the water flow from the spray nozzle 301 is smaller than the spray pressure of the water flow from the spray nozzle 302. In addition, it is desirable to set the injection pressure of each water stream in the range of 1.0 to 7.0 MPa, respectively.

In a state where the fibers of the fiber assembly 50 are not entangled with the woven fabric 40, the outer surface of the fiber assembly 50 (the surface opposite to the side opposite to the woven fabric 40) is not restricted, and the degree of freedom is high. Therefore, if the spray pressure of the water stream on the upstream side is increased, the fibers may be blown away by the sprayed water stream, and the fiber assembly 50 may be damaged or the fiber density of the fiber assembly 50 may be shifted. In this regard, setting the jet pressure of the upstream water stream to be lower can reduce the worry of blowing the fiber, and it is easier to more reliably entangle the fiber and the fabric 40. On the other hand, on the downstream side, since at least a part of the fiber is entangled with the fabric 40, the fiber assembly 50 must be further entangled with the fabric 40. Therefore, in addition to applying a higher jet pressure of the water stream on the upstream side, more fibers of the fiber assembly 50 and the fabric 40 are easily entangled.

Next, the sheet 60 is delivered from the first rotating body 150 to the second rotating body 160, and the sheet 60 is conveyed by the rotation of the second rotating body 160. The second rotating body 160 has the horizontal axis C160 as the center of rotation, and continuously drives and rotates the outer peripheral surface 160a in the circumferential direction Dc1 (for example, in the clockwise direction). The circumferential direction Dc1 is also the conveying direction, and the CD direction is orthogonal to the circumferential direction Dc1. The second rotating body 160 has the same structure as the first rotating body 150, and detailed description is omitted.

In addition, it is desirable that the peripheral speed of the second rotating body 160 is equal to or higher than the peripheral speed of the first rotating body 150, and it is more desirable that the peripheral speed of the second rotating body 160 is faster than the peripheral speed of the first rotating body 150. Similar to the relationship between the speeds of the first rotating body 150 and the upstream conveyor 130a, setting the peripheral speed of the second rotating body 160 to be higher than the peripheral speed of the first rotating body 150 allows the fabric 40 to be fabricated on the first rotating body 150. The fear of loosening or stagnation of the fiber assembly 50 is reduced.

A second injection device 400 is provided on the outer side of the second rotating body 160 in the radial direction. The second spraying device 400 is provided with spray nozzles 401 and 402 in order from the upstream side in the conveying direction, and sprays the sheet 60 held on the outer peripheral surface 160a of the second rotating body 160 from the outside to the inside in the radial direction of the second rotating body 160 Water f. The structure of the injection nozzles 401 and 402 of the second injection device 400 is the same as that of the injection nozzle 302. By the spraying of the water f by the second spraying device 400, the sheet 60 can be made into a state in which the fibers of the fiber assembly 50 are more entangled. At this time, as with the first spray device 300, it is more preferable that the spray pressure of the water f sprayed by the upstream spray nozzle 401 be smaller than the spray pressure of the water spray sprayed by the downstream spray nozzle 402. In addition, the second spraying device 400 does not necessarily have to be installed, and it can be appropriately installed according to the entangled state of the sheet 60. In addition, the second rotating body 160 may be subjected to dehydration and drying processes that suck the moisture of the sheet 60.

FIG. 10 is a diagram schematically showing a cross section in the CD direction of the sheet 60 of B in FIG. 6. As shown in FIG. 10, the entire area of the fiber assembly 50 intertwined with the fabric 40 of the sheet 60 overlaps the fabric 40 in the thickness direction. The sheet 60 in the state where at least a part of the fibers of the fiber assembly 50 and the fabric 40 are entangled has a length in the CD direction of the fabric 40 with a more stable shape greater than the length in the CD direction of the fiber assembly 50 with a more unstable shape. Therefore, when the length in the CD direction of the fiber assembly 50 is made longer than the length in the CD direction of the woven fabric 40, the shape of the sheet 60 is more easily stabilized, and the sheet 60 is easier to be conveyed in a more stable state. The stable conveying state of the sheet 60 is maintained from the entanglement step to the cutting step.

＜＜Dehydration step＞＞ After the conveyance by the rotation of the second rotating body 160, the sheet 60 is conveyed from the second rotating body 160 to the downstream conveying device 140 and then conveyed to the dehydrating device 250. The downstream conveying device 140 includes a downstream conveying belt 140 a, receives the sheet 60 conveyed by the rotation of the second rotating body 160, and conveys it toward the dehydrating device 250.

The dewatering device 250 includes a conveying belt 250a and a plurality of suction units 250b, and the sheet 60 conveyed from the downstream conveying device 140 is conveyed toward the cutting device 500 by the conveying belt 250a. When a plurality of suction parts 250b are being transported by the transport belt 250a, the moisture of the sheet 60 on the transport belt 250a is sucked from below.

＜＜Cut step＞＞ The cutting process is performed after the dehydration process of the sheet 60. The sheet 60 is delivered from the dehydration device 250 to the cutting device 500. The cutting device 500 includes a cutting roller 501 and an anvil roller 502. The cutting roller 501 and the anvil roller 502 are respectively provided with a drive source such as a motor, and are rotating bodies that are driven to rotate in the circumferential direction Dc2 and the circumferential direction Dc1, respectively, centering on the rotating shafts C501 and 502. In addition, the outer peripheral surface of the cutting roller 501 is provided with a plurality of protrusions (not shown). The cutting roller 501 and the anvil roller 502 are arranged such that the axial directions of the rotating shaft C501 and the rotating shaft C502 are directed toward the CD direction, and the outer peripheral surfaces of each other are arranged to face each other. Furthermore, when the sheet 60 passes through the roller gap between the cutting roller 501 and the anvil roll 502 that is driven to rotate, it is cut at the cutting lines S at both ends of the CD direction of the sheet 60 shown in FIG. Component 70.

<The manufacturing method of the sheet member 70 of the second embodiment> FIG. 11 is a diagram schematically showing a part of the manufacturing apparatus 101 used in the method of manufacturing the sheet member 70 according to the second embodiment. The basic structure of the manufacturing apparatus 101 is the same as that of the manufacturing apparatus 100. In the manufacturing apparatus 101, the upstream conveying device 130 does not convey the fabric 40, but conveys the fabric 40 toward the first rotating body 150 by the rotation of the supply rotating body 180. That is, in the second embodiment, the arrangement step is performed on the outer peripheral surface 150a of the first rotating body 150. In the following description, members and the like that are the same as those of the manufacturing apparatus 100 of the first embodiment are denoted by the same reference numerals, and the description of the parts common to the first embodiment is omitted.

＜＜The first transportation step＞＞ In the first conveying step, the upstream conveying device 130 conveys the fiber assembly 50 toward the first rotating body 150, and the supply rotating body 180 supplies the fabric 40 to the first rotating body 150 by its rotation. In addition, the supply rotating body 180 is a so-called raw material roll that winds the continuous fabric 40 into a reel shape. The fabric 40 is transported using the supply rotating body 180, and the upstream conveyor belt 130a can transport only the fiber assembly 50, and can transport the fabric 40 and the fiber assembly 50 in a stable state. The CD direction length (W40) of the fabric 40 conveyed from the supply rotating body 180 is longer than the CD direction length (W50) of the fiber assembly 50 conveyed by the upstream conveying device 130 (W40>W50).

In addition to feeding the fabric 40 to the first rotating body 150 at a constant speed, it is desirable. For example, when the supply rotating body 180 uses a raw material roll, it is assumed that even if the peripheral speed of the supply rotating body 180 is controlled to be the same as that of the first rotating body 150 The peripheral speed becomes the same speed, but in fact the two will not always be the same. If these two speeds cannot be the same, uneven tension may occur. Therefore, as shown in FIG. 11, it is desirable to provide a tension control device 800 of the fabric 40 between the supply rotating body 180 and the first rotating body 150.

The tension control device 800 adjusts the tension of the fabric 40 when it is supplied to the first rotating body 150 to a predetermined value. The tension control device 800 includes a pair of fixed rollers 801 and a jumping roller 802 provided between the pair of fixed rollers 801. The jumping roller 802 is set to be able to reciprocate in the vertical direction, and the jumping roller 802 moves in the vertical direction by its own weight to keep the tension of the continuously released fabric 40 constant. With the movement of the dancer roller 802 in the vertical direction, the difference between the peripheral speed of the supply rotating body 180 and the peripheral speed of the first rotating body 150 is absorbed, and the tension of the fabric 40 supplied to the first rotating body 150 can be easily kept constant. . In this way, the tension control device 800 is provided to prevent the fabric 40 from falling down, and the fabric 40 in a state of constant tension can be supplied to the first rotating body 150. Thereby, while conveying the fabric 40 in a stable state in the first rotating body 150, the fiber assembly 50 and the fabric 40 are easily entangled in a stable state.

In addition, it is desirable that the peripheral speed of the supply rotating body 180 is equal to the peripheral speed of the first rotating body 150. The worry about loosening of the fabric 40 during transportation can be reduced. In addition, it is desirable that the peripheral speed of the first rotating body 150 is equal to or higher than the moving speed of the upstream conveyor belt 130a. The fiber assembly 50 is conveyed by the first rotating body 150 at a speed higher than the upstream conveying belt 130a, and the fiber assembly 50 is easily conveyed while spreading the fibers of the fiber assembly 50 in the conveying direction on the outer peripheral surface 150a of the first rotating body 150. Therefore, it is easy to alleviate the deviation of the fiber density of the fiber assembly 50 generated when the fiber assembly 50 is delivered to the first rotating body 150 from the upstream conveying belt 130a.

<The manufacturing method of the sheet member 70 of the third embodiment> FIG. 12 is a diagram schematically showing a part of the manufacturing apparatus 102 used in the method of manufacturing the sheet member 70 according to the third embodiment. The manufacturing apparatus 102 manufactures the sheet member 70 in which the fiber assembly 50 and the continuous fabric 40 are intertwined and integrated similarly to the manufacturing apparatuses 100 and 101. The manufacturing device 102 includes an upstream conveying device 130 and a water supply device 200, a first rotating body 150 and a first spraying device 300, a second rotating body 160 and a second spraying device, and a downstream conveying device 140 from the upstream side in the conveying direction. Dewatering device 250 and cutting device 500. In the following description, members and the like that are the same as those of the manufacturing apparatus 100 of the first embodiment are denoted by the same reference numerals, and the description of the parts common to the first embodiment is omitted.

＜＜The first transportation step＞＞ In the first conveying step, the upstream conveying device 130 is used to convey the fabric 40 and the fiber assembly 50 on the fabric 40. The upstream conveying device 130 includes an upstream conveying belt 130a and a roller 130b. At this time, since the length of the woven fabric 40 in the CD direction is longer than the length of the fiber assembly 50 in the CD direction (W40>W50), if the upstream conveyor belt 130a is viewed from above, the entire area of the fiber assembly 50 is placed on The fabric 40 is conveyed in the state above it. That is, almost all the fiber assemblies 50 to be transported are placed on the fabric 40 and are transported. Since there is no fiber assembly 50 that is not placed on the fabric 40, almost all the fiber assemblies 50 are under the same conditions. The next was transported. Thereby, it is easy to maintain the fibers of the fiber assembly 50 in a uniform state, and it is easy to reduce the fear of stagnation of the fibers and changes in the fiber density due to transportation.

The water supply device 200 is a device that sprays water f as a fluid, and is provided above the upstream conveyor 130a. FIG. 13 is a diagram schematically showing the water supply device 200. In FIG. 13, the upstream conveying device 130 and the like are omitted and shown. The water supply device 200 supplies water f toward the upstream conveying belt 130a to wet the fiber assembly 50 conveyed on the upstream conveying belt 130a and reduce the thickness of the fiber assembly 50. The fibers of the fiber assembly 50 are light and soft materials. Simply put, because they are in a fluffy state, they will move during transportation until they are entangled with the fabric 40, or the water caused by the first spray device 300 in the subsequent steps. The fiber is sprayed under the spray pressure of f, and there is a concern that the fiber part will increase or decrease. Here, it is desirable to spray water f on the fiber assembly 50 in the first conveying step to wet the fibers, and to reduce the thickness of the fiber assembly 50 so that the fibers are not easily moved. That is, because the purpose of the water supply device 200 is only to make the fiber assembly 50 contain water, the fiber assembly 50 and the fabric 40 are not entangled at this point in time. Thereby, in the conveyance in the first conveyance step, it is possible to reduce the fear that the unevenness of the fibers of the fiber assembly 50 of the sheet member 70 after manufacture is caused by the deviation of the fiber density. In addition, as a method of wetting the fiber assembly 50 with water, dripping water, spraying spray-like water, or soaking the fiber assembly 50 in a container containing water may be used.

Then, it is conveyed toward the first rotating body 150 under the roller 130b. When the fabric 40 and the fiber assembly 50 are delivered to the first rotating body 150 from the upstream conveying device 130, the fiber assembly 50 is passed through the gap between the roller 130b and the upstream conveying belt 130a facing each other. The fiber assembly 50 is sandwiched between the roller 130b and the upstream conveying belt 130a, and the fiber assembly 50 is crushed in the thickness direction, so that the thickness of the fiber assembly 50 is reduced, and the movement of the fibers can be stabilized. Thereby, the fiber moves in the first conveying step, the fear of fiber density deviation can be reduced, and the fear of fiber unevenness of the fiber assembly 50 of the sheet member 70 after manufacture can be reduced.

＜＜The second transport step＞＞ In the manufacturing apparatus 102, it is desirable to provide the conveying surface of the upstream conveying belt 130a at a position higher than the axis C150. In this way, the height difference when the fabric 40 and the fiber assembly 50 are delivered from the upstream conveyor belt 130a to the first rotating body 150 is further reduced, and the gradient generated in the conveyance path can be further reduced. Thereby, the fabric 40 and the fiber assembly 50 can be delivered from the upstream conveying device 130 to the first rotating body 150 in a more stable state.

In the second conveying step, the fabric 40 is conveyed in a state in which the outer peripheral surface 150a of the first rotating body 150 is in contact, and it is preferable to convey the fiber assembly 50 at the outermost side with respect to the conveying surface. Because the length (W40) in the CD direction of the fabric 40 is longer than the length (W50) in the CD direction of the fiber assembly 50 (W40>W50), the fabric 40 and the fiber assembly 50 are in contact with the fabric 40 and the outer peripheral surface 150a. While applying tension in the conveying direction to the fabric 40 in a stable state, the fiber assembly 50 in the state where almost all is placed on the fabric 40 is transported. Therefore, the fiber assembly 50 is stabilized and the fibers are easily removed. The fibers of the assembly 50 are conveyed in a uniform state. The fiber assembly 50 is conveyed in a stable state, and the entanglement process is easily performed in a stable state.

In addition, because the fibers of the fiber assembly 50 are light and have a high degree of freedom, as shown in FIG. 12, when there is a gradient in the conveying path during the conveying from the first conveying step to the second conveying step, In the vicinity of the roller 130b where the upstream conveying device 130 delivers the fabric 40 and the fiber assembly 50 to the first rotating body 150, the conveyance of the fiber assembly 50 may easily stop and the fiber density may change. The fabric 40 is transported while contacting the outer peripheral surface 150a. If the fiber assembly 50 is transported at the outermost side with respect to the transport surface, the outer surface of the fiber assembly 50 (the surface opposite to the side opposite to the fabric 40 ) Is not restrained, but is transported with a high degree of freedom. Therefore, when the first rotating body 150 is used for transportation, it is easy to spread the fibers of the fiber assembly 50 along the transportation direction for transportation. As a result, the first spray device 300 is used to spray high-pressure water f on the fiber assembly 50 that is more spread out of the fibers of the fabric 40, and the fibers of the fiber assembly 50 are easily formed with respect to the fabric 40 so that the fibers of the fiber assembly 50 are uniformly intertwined.

Next, the sheet 60 is delivered from the first rotating body 150 to the second rotating body 160, and the sheet 60 is conveyed by the rotation of the second rotating body 160. The second spray device 400 sprays the water f toward the sheet 60 from the outer side in the radial direction of the second rotating body 160 to the inner side. The second spray device 400 includes one spray nozzle. By the spraying of the water f by the second spraying device 400, the sheet 60 can be made into a state in which more fibers of the fiber assembly 50 are entangled with the fabric 40. In addition, it is more desirable to set the spray pressure of the sprayed water stream such that the spray nozzle 301 is the smallest, and it is more preferable to increase the spray nozzle 302 and the spray nozzle 303 in this order. On the upstream side, since the fear of flying the fibers of the fiber assembly 50 due to the water jet is reduced, it is possible to make more fibers and the fabric 40 entangled on the downstream side.

Since the CD-direction length (W40) of the more stable fabric 40 is greater than the CD-direction length (W50) of the more unstable fiber assembly 50 (W40>W50), at least a part of the fiber assembly 50 is The shape of the sheet 60 in the state where the fibers and the fabric 40 are entangled is easy to stabilize, and it is easy to be conveyed in a more stable state (FIG. 10 ). The length of the woven fabric 40 in the state before the cutting in the cutting step in the CD direction is longer than the length of the fiber assembly 50 in the CD direction. The stable conveyance state of the sheet 60 can be maintained from the entanglement step to the cutting step.

＜＜Dehydration step＞＞ After the conveyance by the rotation of the second rotating body 160, the sheet 60 is conveyed from the second rotating body 160 to the downstream conveying device 140 as in the first embodiment, and then conveyed to the dehydrating device 250 for dehydration processing.

＜＜Cut step＞＞ The cutting process is performed after the dehydration process of the sheet 60. As in the first embodiment, the sheet 60 delivered from the dehydration device 250 is cut by the cutting device 500 at both ends in the CD direction at the cutting line S to form sheet members 70 (see FIG. 10).

===Other implementation forms=== Although the embodiments of the present invention have been described above, the above-mentioned embodiments are intended to facilitate the understanding of the present invention, and are not intended to limit the explanation of the present invention. In addition, the present invention can be modified and improved as long as it does not deviate from its spirit, and it goes without saying that the present invention also includes equivalents. For example, there may be such a deformation as shown below.

In the above-mentioned embodiment, although the rotating bodies (the first rotating body 150 and the second rotating body 160) are used for conveying, the fiber assembly 50 and the fabric 40 are entangled, but it is not limited to this. For example, it is also possible to use a horizontal conveyor belt for conveyance while spraying fluid toward the conveyor belt to allow the fiber assembly 50 and the fabric 40 to be entangled.

Furthermore, in the above-mentioned embodiment, although the first rotating body 150 and the second rotating body 160 are used to convey the fabric 40 and the fiber assembly 50 in the second conveying step, it is not limited to this. For example, the first rotating body 150 can also be transported while carrying out the entanglement process, and then it can be transported to the downstream side transport device 140 immediately, or all the processes (from the first transport device) can be carried out on a transport device with a conveyor belt. Step to cutting step). In addition, when the second rotating body 160 is not provided, the conveying speed of the downstream conveying device 140 is preferably equal to or higher than the peripheral speed of the first rotating body 150. Thereby, it is possible to reduce the fear that the fabric 40 transported on the first rotating body 150 will loosen or the transport of the fiber assembly 50 will stop. Moreover, when the second rotating body 160 is installed, regardless of whether it is installed or not, the downstream conveying device 140 is equipped with a suction mechanism, and the downstream conveying device 140 can be used to convey the sheet 60 (the fabric 40 and the fiber assembly 50) while allowing the fabric 40 Intertwined with the fiber assembly 50.

Furthermore, in the third embodiment, the fabric 40 is placed on the fiber assembly 50 in the arrangement step, but it is not limited to this. In the arranging step, the fiber assembly 50 may be placed on the fabric 40 and conveyed to the entanglement step.

In the above-mentioned embodiment, although the fabric 40 is brought into contact with the conveying surface (outer peripheral surfaces 150a, 160a) in the entanglement step, and the fiber assembly 50 is placed on the fabric 40, the entanglement is carried out while being conveyed, but it is not limited to this. The fiber assembly 50 may be brought into contact with the conveying surface, and the fabric 40 may be conveyed and entangled while being placed on the fiber assembly 50. At this time, since the length (W40) in the CD direction of the fabric 40 is less than the length (W50) in the CD direction of the fiber assembly 50, in the entanglement step, substantially the entire area of the fiber assembly 50 is covered by the fabric 40 Jet fluid (water f) down. Since the entanglement process is performed in the state where the movement of the fibers of the fiber assembly 50 is restricted by the woven fabric 40, the risk of deviation of the fiber density of the fiber assembly 50 is reduced, and the fiber density generated in the sheet member 70 after manufacture can be reduced. The unevenness is reduced.

In the above-mentioned embodiment, although the thickness of the fiber assembly 50 is reduced by using the water supply device 200, the roller 130b, etc., the structure of the water supply device 200 may not necessarily be provided, or the roller 130b and the upstream conveyor belt may not be provided. 130a has a structure in which the fiber assembly 50 is opposed to each other. Moreover, the structure of either the water supply device 200 and the roller 130b may be provided. As long as any of them are provided, the thickness of the fiber assembly 50 can be made thinner.

In the above-mentioned embodiment, although a plurality of injection nozzles are provided in the first injection device 300, it is not limited to this. For example, the first spray device 300 may be provided with one spray nozzle, or a plurality of spray devices that spray water streams toward the first rotating body 150 may be provided. In addition, the number of injection nozzles included in the first injection device 300 may be arbitrarily changed. The same applies to the second injection device 400.

In addition, in the above-mentioned embodiment, although water f is used as the fluid sprayed from the first spray device 300 and the second spray device 400, it is not limited to this. For example, it may be a gas, and the water may not be limited to a liquid having a predetermined composition and viscosity.

1: Sanitary napkins (sanitary napkins, absorbent articles) 2: absorber 3: Surface sheet (sheet member) 4: back sheet 5: Side sheet 6: Wings 8: Outer peripheral seal 10: Absorbent core 11: Adhesion area 12: Adhesive area for wings 20: core cladding sheet 40: fabric 41: Composition yarn 42: warp 43: Weft 45: Weaving 50: Fiber assembly 51: constituent fiber 60: flakes 70: sheet member 100: Manufacturing device 101: Manufacturing Device 102: Manufacturing Device 120: Roller for direction change 130: Upstream conveying device 130a: Upstream conveyor belt (conveyor belt, other conveying mechanism) 130b: Roll 140: Downstream conveyor 140a: Downstream conveyor belt 150: The first rotating body (rotating body, a certain conveying mechanism) 150a: outer peripheral surface 151: Suction Hole 152: Cylindrical partition 153: Next Door 160: The second rotating body 160a: outer peripheral surface 180: supply rotating body 200: water supply device 250: dehydration device 250a: conveyor belt 250b: Attraction Department 300: The first injection device 301: Jet nozzle 302: Jet nozzle 303: Jet nozzle 400: The second spray device 401: Jet nozzle 402: Jet nozzle 500: cutting device 501: Cutting Roll 502: Anvil Roll 800: Tension control device 801: fixed roller 802: Dancing roller f: water S: cut line SP: roughly enclosed space Dc1: circumferential Dc2: circumferential C160: horizontal axis C150: Horizontal axis C501: Rotation axis C502: Rotation axis

Fig. 1 is a plan view of the sanitary napkin 1 viewed from the skin side. Fig. 2 is a plan view of the sanitary napkin 1 viewed from the non-skin side. [Fig. 3] is a cross-sectional view taken along line X-X in Fig. 1. [Fig. [FIG. 4] is an enlarged view of a part of the surface sheet 3. [Fig. 5] A diagram showing a state where the surface sheet 3 is separated into a woven fabric 40 and a fiber assembly 50. Fig. 6 is a diagram schematically showing a part of the manufacturing apparatus 100 used in the method of manufacturing the sheet member 70 according to the first embodiment. Fig. 7 is a diagram schematically showing the woven fabric 40 and the fiber assembly 50 in the first step. [Fig. 8] is a diagram schematically showing a cross section of the first rotating body 150. [FIG. 9] FIG. 9A thereof is a diagram schematically showing the injection nozzle 302. [FIG. FIG. 9B is a diagram schematically showing a configuration example of the injection hole of the injection nozzle 302. Fig. 10 is a diagram schematically showing a cross section in the CD direction of the sheet 60 of B in Fig. 6. Fig. 11 is a diagram schematically showing a part of the manufacturing apparatus 101 used in the method of manufacturing the sheet member 70 according to the second embodiment. Fig. 12 is a diagram schematically showing a part of the manufacturing apparatus 102 used in the method of manufacturing the sheet member 70 according to the third embodiment. [Fig. 13] is a diagram schematically showing the water supply device 200.

40: fabric

50: Fiber assembly

60: flakes

70: sheet member

100: Manufacturing device

130: Upstream conveying device

130a: Upstream conveyor belt (conveyor belt, other conveying mechanism)

150: The first rotating body (rotating body, a certain conveying mechanism)

150a: outer peripheral surface

160: The second rotating body

160a: outer peripheral surface

250: dehydration device

250a: conveyor belt

250b: Attraction Department

300: The first injection device

301: Jet nozzle

302: Jet nozzle

400: The second spray device

401: Jet nozzle

402: Jet nozzle

500: cutting device

501: Cutting Roll

502: Anvil Roll

C150: Horizontal axis

C160: horizontal axis

C501: Rotation axis

C502: Rotation axis

Claims (15)

A method for manufacturing a sheet member is a method for manufacturing a sheet member for an absorbent article having a fabric and a fiber assembly in a state intertwined with the fabric, characterized by: Comprising: a step of arranging the fiber assembly on at least one surface side of the continuous fabric; and After the aforesaid arranging step, while conveying the fabric and the fiber assembly, while spraying fluid toward the fabric and the fiber assembly, the interlacing step of intersecting the fiber assembly and the fabric, In the CD direction where the fabric and the fiber assembly are orthogonal to the conveying direction, The maximum length of the aforementioned fiber assembly is equal to or less than the length of the aforementioned fabric. The method of manufacturing a sheet member according to claim 1, wherein In the aforementioned entanglement step, a certain transport mechanism is used to transport the aforementioned fiber assembly at a certain transport speed, Use another conveying mechanism toward the aforementioned certain conveying mechanism to convey the aforementioned fiber assembly at another conveying speed, The aforementioned certain conveying speed is higher than the aforementioned other conveying speed. The method of manufacturing a sheet member according to claim 1 or 2, wherein In the aforementioned interfacing step, The fluid is sprayed several times toward the fabric and the fiber assembly at different positions in the conveying direction, The pressure of the fluid ejected on the upstream side of the transport direction is equal to or less than the pressure of the fluid ejected on the downstream side of the transport direction. The method of manufacturing a sheet member described in any one of claims 1 to 3, wherein: In the entanglement step, the fabric and the fiber assembly are transported using a rotating body equipped with a suction mechanism. The method of manufacturing a sheet member described in claim 4, wherein: In the aforementioned entanglement step, the fabric is brought into contact with the peripheral surface of the aforementioned rotating body for conveyance. The method of manufacturing a sheet member according to claim 5, wherein: In the aforementioned interfacing step, The aforementioned rotating body is the first rotating body, A second rotating body different from the aforementioned first rotating body is provided, After the first rotating body is conveyed, at least one of the fabric and the fiber assembly is brought into contact with the peripheral surface of the second rotating body for conveyance, The peripheral speed of the second rotating body is equal to or higher than the peripheral speed of the first rotating body. The method of manufacturing a sheet member according to claim 6, wherein The second rotating body has a suction mechanism, The fluid is sprayed from the radially outer side toward the inner side of the second rotating body so that the fiber assembly and the fabric are intertwined. The method of manufacturing a sheet member described in any one of claims 4 to 7, wherein Use a conveyor belt to transport the fiber assembly toward at least the rotating body, The conveying surface of the conveying conveyor belt is arranged below the rotation center of the rotating body, Between the transportation by the aforementioned conveyor belt and the transportation by the aforementioned rotating body, Furthermore, there is a passing step of the fiber assembly passing the closest position of the rotating body and the conveying belt. The method of manufacturing a sheet member according to claim 8, wherein In the transportation performed by the aforementioned conveyor belt, the aforementioned conveyor belt does not convey the aforementioned fabric, There is a supply step of supplying the fabric to the rotating body before the conveying of the rotating body. The method of manufacturing a sheet member according to claim 9, wherein In the supply step, the supply rotating body for supplying the fabric is to maintain the tension of the fabric to supply the fabric. The method of manufacturing a sheet member according to claim 10, wherein: The peripheral speed of the aforementioned supply rotating body is equal to the peripheral speed of the aforementioned rotating body, The peripheral speed of the rotating body is a speed equal to or higher than the moving speed of the conveyor belt. The method of manufacturing a sheet member described in any one of claims 4 to 7, wherein Use a conveyor belt to transport the fiber assembly toward at least the rotating body, The conveying surface of the conveying conveyor belt is set at the same height as the rotation center of the rotating body, or a position higher than the rotation center, After the transportation using the rotating body is started, the fiber assembly is conveyed upward along the rotation direction of the rotating body. The method of manufacturing a sheet member according to claim 5, wherein: In the aforementioned entanglement step, one of the aforementioned rotating bodies is used to transport the aforementioned fabric and the aforementioned fiber assembly, After the aforementioned rotating body is transported, the downstream side transport conveyor belt is used to transport the aforementioned fabric and the aforementioned fiber assembly, The conveying speed of the downstream conveying belt is equal to or higher than the circumferential speed of the rotating body. The method of manufacturing a sheet member according to claim 13, wherein The aforementioned downstream conveyor belt is equipped with a suction mechanism, While conveying the fabric and the fiber assembly using the downstream conveying belt, fluid is sprayed toward the fabric and the fiber assembly to further entangle the fiber assembly and the fabric. A manufacturing apparatus for a sheet member is a manufacturing apparatus for a sheet member for an absorbent article having a fabric and a fiber assembly in a state intertwined with the fabric, characterized in that: Having: an arrangement portion in which the fiber assembly is arranged on at least one surface side of the continuous fabric; and After the arrangement of the fiber assembly, while conveying the fabric and the fiber assembly, the fluid is sprayed toward the fabric and the fiber assembly to allow the fiber assembly and the fabric to intersect at the intersection, In the CD direction where the fabric and the fiber assembly are orthogonal to the conveying direction, The maximum length of the aforementioned fiber assembly is equal to or less than the length of the aforementioned fabric.

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