JP6814469B2 - Manufacturing method and manufacturing equipment for continuous laminated sheet - Google Patents

Description

The present invention relates to a method and an apparatus for manufacturing a continuous laminated sheet body in which a long fiber entanglement body is sandwiched between laminated continuous sheet bodies, and in particular, a long fiber entanglement body is formed between the laminated continuous sheet bodies. The present invention relates to a method and an apparatus for manufacturing a continuously laminated sheet body that is continuously sandwiched while being sandwiched.

A method for producing a non-woven fabric in which an entanglement of long fibers is made into a sheet by using a so-called "melt blow method" in which a thermoplastic resin extruded from a resin nozzle of an extruder is applied to a discharge air stream and stretched into long fibers is known. .. Since such a melt blow method can continuously produce a long fiber entanglement body, it is possible to obtain a long non-woven fabric by continuously supplying the long fiber entangled body while winding it.

For example, Patent Document 1 discloses a method for manufacturing a non-woven fabric in which long fiber entanglements falling from a plurality of small-diameter resin nozzles installed vertically downward are collected on a horizontal stage and continuously wound up. doing. The resin melted by the extruder is discharged vertically downward from a plurality of resin nozzles, and heated air is discharged from a slit that surrounds the resin nozzles in a ring shape, and the molten resin is solidified while being stretched into long fibers. I will go. In the process of this solidification, the long fibers become long fiber confounders and are gravitationally dropped with the discharge airflow and carried onto the horizontal stage, but in order to efficiently collect them on the horizontal stage, the long fibers are from the back side of the mesh-shaped horizontal stage. The confounding body is sucked by the suction duct.

Further, in Patent Document 2, molten resin is discharged horizontally from a plurality of small-diameter resin nozzles juxtaposed in the horizontal direction between slits provided in two rows above and below for discharging the heating airflow, and the molten resin is ejected in the horizontal direction. Disclosed is a method for producing a non-woven fabric in which a long fiber entanglement formed while being collected is collected and wound on a rotating screen drum. The screen drum is arranged so as to face the small-diameter resin nozzle in the horizontal direction, and is also mesh-shaped so that the long fiber confounders can be collected while being sucked, and can be sucked by the suction duct inside the screen drum. ..

Patent Document 3 discloses a method for producing a laminated sheet body in which a continuous sheet body is continuously supplied in the horizontal direction and a long fiber entanglement body is continuously supplied thereto by a melt blow method. Similar to Patent Document 1, a continuous sheet body is passed through the upper surface of a horizontal stage having a suction mechanism, and a long fiber entanglement body is continuously formed on the continuous sheet body. Here, the continuous sheet body is made of a breathable non-woven fabric, woven fabric, knitted cloth, or the like so that the long fiber entanglement body can be sucked and collected on the continuous sheet body on the horizontal stage.

Japanese Unexamined Patent Publication No. 2011-162915 JP 2015-7296 Japanese Unexamined Patent Publication No. 2011-144480

A thermoplastic resin extruded from a resin nozzle of an extruder is applied from the outside of a high-speed air stream formed in a substantially horizontal direction and stretched to form an entangled body made of ultrafine elongated fibers having a diameter on the order of microns. In particular, the inventors of the present application increase the diameter to 0.5 mm or more, contrary to the small diameter of the long fiber that can obtain the diameter of the resin nozzle, and apply a negative pressure to the discharge port of the resin nozzle by the high-speed airflow from the airflow nozzle. It has been found that the molten resin can be forcibly drawn into the high-speed airflow from the outside of the high-speed airflow and stretched into ultrafine elongated fibers having a nano-order diameter. In such a horizontal melt blow method, this clogging can be significantly suppressed by the large-diameter resin nozzle, and various powders and the like can be compounded even though they are ultrafine long fibers. Therefore, long fiber entanglement with added functionality is possible. You can get your body with high productivity.

Further, according to the horizontal melt blow method using a large-diameter resin nozzle, a continuous sheet body can be continuously supplied and a long fiber entanglement body is continuously provided on the continuous sheet body because it can be mass-produced at high speed even though it is an ultrafine long fiber. Even in the case, the continuous sheet body can be supplied at high speed, and the laminated sheet body can be efficiently provided.

On the other hand, the horizontal airflow formed by the horizontal melt blow method lacks the stability of holding the long fiber entanglement that falls by gravity in it, and the lightweight long fiber entanglement made of ultrafine long fibers tends to float in the air. Therefore, in order to accurately integrate such a long fiber entanglement having low movement directivity on a continuously supplied continuous sheet body, the long fiber entanglement body is sucked from the back side of the continuous sheet body as described above. A suction means is required, and the continuous sheet body is limited to one having sufficient air permeability.

The present invention has been made in view of the above circumstances, and an object of the present invention is continuous lamination in which long fiber entanglements are formed by a horizontal melt blow method and sandwiched between continuous sheet bodies in which the long fiber entanglements are laminated. An object of the present invention is to provide a method for manufacturing a sheet body and a manufacturing apparatus.

In the method for producing a continuous laminated sheet body according to the present invention, a thermoplastic resin extruded from a resin nozzle of an extruder is applied to a discharge air stream formed in a substantially horizontal direction and stretched to form a length composed of long fibers having an average diameter of at least 10 μm or less. It is a method of manufacturing a continuous laminated sheet body formed by forming a fiber entanglement body and sandwiching it between continuous sheet bodies in which the fiber entangled bodies are laminated, and the upper continuous sheet body and the lower continuous sheet body flowing in a long direction and the same direction are vertically oriented. The surfaces are overlapped and sent out through the vertically opposed rolls while gradually approaching each other, and the discharge airflow is formed between the upper continuous sheet body and the lower continuous sheet body in front of the vertically opposed rolls. It is characterized by giving it toward the drawn airflow.

According to such an invention, even a long fiber entangled body made of ultrafine elongated fibers having an average diameter of at least 10 μm or less is vertically opposed to each other formed by close movement of the upper continuous sheet body and the lower continuous sheet body from the vertical direction. The pull-in airflow toward the roll side makes it possible to accurately sandwich this between the continuous sheet bodies. Further, since the continuous sheet body is not necessarily sucked through the continuous sheet body, the continuous sheet body is not necessarily required to be breathable and the material is not limited.

In the above-described invention, the upper continuous sheet body and the lower continuous sheet body are accompanied by an accompanying air flow along the overlapping surface of the upper continuous sheet body and the lower continuous sheet body toward the vertically opposed rolls. It may be characterized by forming the drawn airflow. According to such an invention, the long fiber entanglement body can be more accurately sandwiched between the continuous sheet bodies.

In the above invention, the vertically opposed rolls may be characterized by having a gap so that the accompanying airflow can pass between them. According to such an invention, the drawn airflow can be rectified, and the long fiber entanglement body can be more accurately sandwiched between the continuous sheet bodies.

Further, the manufacturing apparatus of the present invention is a long fiber entanglement composed of long fibers having an average diameter of at least 10 μm or less, which is stretched by applying a thermoplastic resin extruded from a resin nozzle of an extruder to a discharge airflow formed in a substantially horizontal direction. An air flow nozzle that is a continuous laminated sheet body manufacturing device that is sandwiched between continuous sheet bodies that are laminated with each other, and that directs the opening of the resin nozzle in a substantially horizontal direction and forms the discharge air flow from the vicinity thereof. Includes a composite nozzle block including, and vertically opposed rolls in which the upper continuous sheet body and the lower continuous sheet body flowing in the long direction and the same direction are gradually brought close to each other from the vertical direction and the surfaces are overlapped and sent out through the space between them. The composite nozzle block is characterized in that the discharge airflow is provided toward a lead-in airflow formed between the upper continuous sheet body and the lower continuous sheet body in front of the vertically opposed rolls.

According to such an invention, even a long fiber entangled body made of ultrafine elongated fibers having an average diameter of at least 10 μm or less is vertically opposed to each other formed by close movement of the upper continuous sheet body and the lower continuous sheet body from the vertical direction. The pull-in airflow toward the roll side makes it possible to accurately sandwich this between the continuous sheet bodies. Further, since the continuous sheet body is not necessarily sucked through the continuous sheet body, the continuous sheet body is not necessarily required to be breathable and the material is not limited.

In the above-described invention, the upper continuous sheet body and the lower continuous sheet body are accompanied by an accompanying air flow along the overlapping surface of the upper continuous sheet body and the lower continuous sheet body toward the vertically opposed rolls. It may be characterized in that it is guided to the vertically opposed rolls so as to form the drawn airflow. According to such an invention, the long fiber entanglement body can be more accurately sandwiched between the continuous sheet bodies.

In the above invention, the vertically opposed rolls may be characterized by having a gap so that the accompanying airflow can pass between them. According to such an invention, the drawn airflow can be rectified and the long fiber entanglement body can be more accurately sandwiched between the continuous sheet bodies.

It is a schematic view of the laminated sheet body manufactured by the manufacturing apparatus according to this invention, (a) is a perspective view, (b) is an enlarged sectional view. It is a figure which shows the outline of the long fiber entanglement shown in FIG. 1, FIG. 2 (a) is an external photograph, FIG. 2 (b) is an enlarged photograph, and FIG. 2 (c) is a part of (b). Is a further enlarged schematic diagram. It is a side view which shows the whole structure of the manufacturing apparatus of the continuous laminated sheet body by Example 1 of this invention. It is a partially enlarged view of the manufacturing apparatus shown in FIG. It is a partial cross-sectional view which shows the outline of the extruder in the fiber supply mechanism shown in FIG. 5 is a schematic view of the composite nozzle block shown in FIG. 5, FIG. 6A is a front view, and FIG. 6B is a sectional view taken along the line CC of FIG. 6A. It is a front view which shows the outline of the whole structure of the manufacturing apparatus of the continuous laminated sheet body by another Example of this invention.

Hereinafter, a method for manufacturing a continuous laminated sheet body as one embodiment of the present invention and a manufacturing apparatus using the same will be described with reference to FIGS. 1 to 6.

As shown in FIG. 1, the continuous laminated sheet body 10 is a long fiber made of a thermoplastic resin formed by a melt blow method between a long first continuous sheet body 12 and a second continuous sheet body 14 which are laminated. It is a sheet body formed continuously by sandwiching an entanglement body (nonwoven fabric) 16. Such a continuous laminated sheet body 10 is used by sealing the end portion and the side portion in the continuous direction to form a bag shape according to the usage environment, the purpose, etc., and utilizing the physical characteristics of the long fiber entanglement body 16. For example, it can be used for liquid or gas filters, liquid absorbers, medical devices, clothing and the like.

The first continuous sheet body 12 and the second continuous sheet body 14 are continuous sheet bodies obtained by molding a film or non-woven fabric made of a flexible material such as paper, resin, or rubber into a strip shape, and the long fibers inside the continuous sheet body 12. It can be selected along with the physical properties of the entanglement 16.

The long fiber entangled body 16 is, for example, a non-woven fabric in which long fibers made of a stretched body of a thermoplastic resin such as polypropylene (PP) are entangled with each other to form a bundle and are densely integrated. This will be described later. In the first embodiment, the first continuous sheet body 12, the second continuous sheet body 14, and the long fiber entangled body 16 are not joined to each other, but are simply laminated.

At the same time, as shown in FIG. 2, the long fibers 18 constituting the long fiber entanglement body 16 have an average diameter D of at least 10 μm or less, preferably 5 μm or less, and a large number of long fibers 18 are intricately entangled with each other. To form an entangled structure. The long fibers 18 are manufactured by the melt blow method as described later, but even if the long fibers 18 are discharged from a resin nozzle having a large diameter, the long fibers 18 having a small diameter are still made of ceramics such as porous clay minerals. Infrared radiation particles can be dispersed to form far infrared radiation fibers. Examples of such a porous clay mineral include crushed porous mudstone containing montmorillonite, vermiculite and the like. Such porous mudstone is typically composed mainly of SiO _{2 of} about 60% and Al ₂ O _{3 of} about 10 to 18% by mass in terms of the amount of oxide.

As shown in FIG. 3, the continuous laminated sheet body manufacturing apparatus 100 includes a first continuous sheet body (upper continuous sheet body) 12 and a second continuous sheet body (lower continuous sheet body) 14 wound in a roll shape. A stacking mechanism including a feeding mechanism 120 for continuously feeding and a pair of upper and lower rolls 132 and 134 (upper and lower opposed rolls) for stacking the first continuous sheet body 12 and the second continuous sheet body 14 in the longitudinal direction. The long fibers 18 are formed on the overlapping surfaces of the winding mechanism 140 that winds up the 130 and the laminated continuous laminated sheet body 10, and the first continuous sheet body 12 and the second continuous sheet body 14 that are supplied to the overlapping mechanism 130. A fiber supply mechanism 110 for continuously supplying the fiber is provided.

The fiber supply mechanism 110 includes a main body 112 that includes a high-pressure gas supply source, and an extruder 114 that supplies the molten thermoplastic resin to a composite nozzle block 116 attached to one end thereof. The extruder 114 and the composite nozzle block 116 in the fiber supply mechanism 110 will be described later (see FIG. 6). The fiber supply mechanism 110 injects the long fibers 18 from the composite nozzle block 116 attached to one end of the extruder 114 on the discharge airflow B1 of the high-pressure gas directed in the horizontal direction (see FIG. 4).

The feeding mechanism 120 pays out the first reel 122 for feeding the first continuous sheet body 12 wound in a long strip shape and a roll shape, and the second reel for feeding out the second continuous sheet body 14 similarly wound in a roll shape. 124 and. Here, the first reel 122 is arranged above the second reel 124 by a predetermined distance in the height direction of the feeding mechanism 120. Then, the first reel 122 rotates in the clockwise direction R1 to continuously feed out the first continuous seat body 12, and the second reel 124 rotates in the counterclockwise direction R2 to continuously extend the first continuous seat body 12. 14 is continuously paid out.

The stacking mechanism 130 includes an upper roll 132 that receives the first continuous sheet body 12 that is continuously fed on the peripheral surface and a lower roll 134 that receives the second continuous sheet body 14 that is continuously fed out on the peripheral surface. Including. Further, the upper roll 132 and the lower roll 134 rotate independently of each other and have an adjusting function capable of approaching or separating the distance between the rotation axes of each other, whereby a gap between the two rolls is provided. While forming G, the holding force P (see FIG. 4) applied to the continuously conveyed laminated sheet body 10 can be adjusted.

Here, as shown in FIG. 4, as the first continuous sheet body 12 and the second continuous sheet body 14 move, the pull-in airflow B2 directed toward the stacking mechanism 130 side is separated from the discharge airflow B1. Is formed. The drawn airflow B2 can be controlled by the transport paths S1 and S2 of the first continuous sheet body 12 and the second continuous sheet body 14 between the upper and lower rolls 132 and 134. By moving the long fibers 18 that have been blown off by the discharge airflow B1 to the drawn airflow B2, the vicinity of the overlapped portion of the first continuous sheet body 12 and the second continuous sheet body 14 without causing them to fly up. Is formed into a focusing portion 16a in which bundles of a plurality of long fibers 18 are focused.

In particular, as shown in FIG. 4, when viewed horizontally, if the angle of the transport path S1 of the first continuous sheet body 12 with respect to the transport path S2 of the second continuous sheet body 14 is an acute angle, the drawn airflow B2 can be formed larger. However, if this angle is too small, a lateral air flow (in the front and back directions of the paper surface in FIG. 4) is formed, which makes it easy for the long fibers 18 to fly up. Although it depends on the moving speed of the first continuous sheet body 12 and the second continuous sheet body 14 and the degree of influence of the discharge airflow B1 on the pull-in airflow B2, the angle of the transport path S1 with respect to the transport path S2 is typically. It is 90 degrees, preferably 60 degrees. Regarding the formation of the lead-in airflow B2, the discharge airflow B1 is not given, and the reachable distance of the discharge airflow B1 is the state where the draw-in airflow B2 is not given, depending on whether or not a filamentous body flows at the measurement position. Can be confirmed.

Further, by appropriately adjusting the transport speed of the first continuous sheet 12 and the second continuous sheet 14 continuously conveyed toward the stacking mechanism 130, the position of the composite nozzle block 116, and the flow velocity of the discharge air flow B1, the first continuous sheet 12 and the second continuous sheet 14 are continuously conveyed. It is preferable to form the accompanying airflow B3 in a laminar flow along the overlapping surface of the 1 continuous sheet 12 and the 2nd continuous sheet 14 together with the drawn airflow B2. At this time, it is more preferable that the gap G between the upper roll 132 and the lower roll 134 is set to such an interval that the accompanying airflow B3 can be guided between them. As a result, when the long fibers 18 supplied on the drawn airflow B2 collide with the first continuous sheet body 12 or the second continuous sheet body 14, they are easily conveyed along the overlapping surface. That is, the long fibers 18 can be more accurately focused toward the focusing portion 16a.

With reference to FIG. 3 again, the winding mechanism 140 includes a winding reel 142 for winding the continuously laminated sheet body 10 continuously conveyed from the stacking mechanism 130 along the transport direction F, and the stacking mechanism 130. Includes a guide roller 144 that supports the lower surface of the continuously laminated sheet body 10 that is conveyed between the and the take-up reel 142. The take-up reel 142 winds up the continuously laminated sheet body 10 which is continuously conveyed by rotating in the counterclockwise direction R2, for example. At this time, the guide roller 144 may be configured so that the position in the height direction is variable according to the winding diameter of the continuously laminated sheet body 10 wound on the winding reel 142. Then, the continuous laminated sheet body 10 wound around the take-up reel 142 can be made into a laminated sheet structure having an arbitrary size by unwinding each appropriate length and cutting in the width direction. Become.

As shown in FIG. 4, in the manufacturing apparatus 100 of the continuous laminated sheet body 10, the first continuous sheet body 12 and the second continuous sheet body 14 are between the upper roll 132 and the lower roll 134 of the stacking mechanism 130. Is continuously conveyed, and the long fibers 18 are continuously supplied from the fiber supply mechanism 110 via the discharge airflow B1 and on the lead-in airflow B2. As a result, as described above, the focusing portion 16a in which the bundles of the plurality of long fibers 18 are focused is formed in the vicinity of the stacking mechanism 130.

Subsequently, the bundle of the long fibers 18 formed in the focusing portion 16a is continuously sandwiched between the first continuous sheet body 12 and the second continuous sheet body 14 by continuously transporting them in the transport direction F. A continuous long fiber entanglement (nonwoven fabric layer) 16 is formed between the first continuous sheet body 12 and the second continuous sheet body 14. At this time, by appropriately adjusting the distance between the rotation axes of the upper roll 132 and the lower roll 134, the distance between the first continuous sheet body 12 and the second continuous sheet body 14 can be controlled, and the holding force P is applied from the vertical direction. As a result, the thickness of the long fiber entanglement body 16 and the continuous laminated sheet body 10 after production can be made uniform.

As shown in FIG. 5, the extruder 114 of the fiber supply mechanism 110 includes a tubular portion 114a for extruding the molten resin from the nozzle 114b and a composite nozzle block 116 attached to the tip of the nozzle 114b, and is a composite nozzle block. The molten resin is stretched over a resin fiber which is an ultrafine elongated fiber by using the ejection force of a gas flow (air flow) generated by a high-pressure gas injected from 116.

A nozzle 114b is formed at one end of the tubular portion 114a, and an internal space S through which a raw material such as pellets made of a thermoplastic resin such as polypropylene is conveyed is formed. The internal space S contains a screw 114c for kneading and extruding the resin toward the nozzle 114b while heating and melting the resin, and the internal space is above the other end side of the tubular portion 114a. A hopper 114d for supplying a raw material to S is attached. Further, the tubular portion 114a is provided with a heater 114e on the outer periphery thereof, and the inside can be heated.

A composite nozzle block 116 for discharging the resin is attached to the nozzle 114b provided on the exit side of the tubular portion 114a in the extrusion direction of the resin. The composite nozzle block 116 is connected to a gas heating unit 112b provided in the main body 112 by a pipe 112c, and the high-pressure gas supplied from a gas supply unit 112a such as a gas compressor connected to the pipe 112c is a gas. It is supplied after being heated by the heating unit 112b (see FIG. 6B described later). The gas heating unit 112b can be configured by, for example, having a heating unit such as a heater around the gas pressure feeding tube.

As shown in FIG. 6A, the composite nozzle block 116 has a mounting portion 116a on the outer peripheral side for mounting the composite nozzle block 116 to the tubular portion 114a, and a main surface when mounted on the tubular portion 114a. Includes a central ejection part 117 that is arranged substantially vertically (the normal of the main surface is oriented horizontally). The mounting portion 116a is provided with a bolt hole (not shown) for fixing to the tubular portion 114a. Further, the ejection portion 117 is provided so that the front surface thereof projects with respect to the mounting portion 116a in the resin pushing direction.

A plurality of discharge ports (resin nozzles) 117a for discharging resin and gas ejection ports 117b for ejecting high-pressure gas are formed in the ejection portion 117. The discharge port 117a and the gas outlet 117b form a pair arranged one by one in the vicinity of each other. By forming a pair of the discharge port 117a and the gas ejection port 117b in a plurality of rows, the production amount of the resin fiber per unit time can be improved, and the resin fiber can be uniformly provided in the row direction.

As shown in FIG. 6B, the discharge port 117a communicates with the resin inflow chamber 117c connected to the nozzle 114b (see FIG. 5). With such a configuration, the resin inflow chamber 117c becomes a flow path of the molten resin extruded from the nozzle 114b when the composite nozzle block 116 is attached to the tubular portion 114a, and guides the molten resin to the discharge port 117a. be able to. The resin inflow chamber 117c is separated from the gas inflow chamber 117d, which is a flow path for high-pressure gas, by a partition 117e.

On the other hand, the gas inflow chamber 117d is connected to the gas injection port 117b and is connected to the gas heating unit 112b via a pipe 112c communicating with the high pressure gas inflow port 117f. As a result, the gas inflow chamber 117d can guide the inflowing high-pressure gas to the gas outlet 117b. Further, the gas outlet 117b is arranged with its axis substantially horizontal so that the gas flow is formed in a substantially horizontal direction by the high-pressure gas ejected (see arrow B1 in FIG. 3). At this time, it is preferable that the discharge port 117a paired with the gas ejection port 117b is also aligned in a substantially horizontal direction according to the direction of the gas ejection port 117b. As a result, the molten resin supplied from the discharge port 117a can be placed on the gas flow of the high-pressure gas and blown off in the horizontal direction.

The gas flow ejected from the gas outlet 117b creates a negative pressure in the vicinity of the discharge port 117a. As a result, the molten resin is drawn out from the inside of the discharge port 117a under a negative pressure, and is discharged substantially horizontally into the air while being stretched inside the gas flow. Further, the inner diameter of the discharge port 117a is determined so that the flow resistance of the molten resin is reduced and the resin is pulled out from the inside by the negative pressure due to the gas flow. The flow resistance of the molten resin decreases as the inner diameter increases. For example, the inner diameter of the outlet portion (near the surface of the ejection portion 117) of the discharge port 117a is preferably 0.5 mm or more.

Since it is sufficient that the molten resin can be pulled out by a negative pressure as described above, the gas outlet 117b is arranged in any direction regardless of whether it is above, below, or sideways with respect to the discharge port 117a. Is possible. In the first embodiment, as an example thereof, the first pair in which the gas outlet 117b is arranged below the discharge port 117a is arranged in the upper stage, and the gas outlet 117a is arranged above the discharge port 117a. Two pairs are arranged in the lower row.

Referring to FIG. 5 again, in order to supply the long fibers 18 to the stacking mechanism 130 by using the fiber supply mechanism 110, the resin melted by the extruder 114 is supplied to the composite nozzle block 116 and drawn out from the discharge port 117a. At the same time, high-pressure gas heated via the gas supply unit 112a and the gas heating unit 112b is supplied to the composite nozzle block 116 and ejected from the gas ejection port 117b to form an air flow B1 (see FIG. 3). As a result, the gas flow from the gas outlet 117b applies a negative pressure to the vicinity of the discharge port 117a, and the molten resin existing in the discharge port 117a is pulled out to the outside and strongly stretched to the ultrafine elongated fibers while being discharged into the air flow B1. Let me. That is, a plurality of long fibers 18 can be produced simultaneously and continuously by a kind of melt blow method in which the molten resin is released into the air and stretched while being cooled. At this time, if the amount of resin extruded is kept constant and the amount of gas flow is adjusted accordingly, the operation can be easily stabilized.

Further, the number of pairs of the discharge port 117a and the gas ejection port 117b of the composite nozzle block 116 is further increased, and for example, a plurality of pairs are provided in three or more rows in the ejection portion 117 to further increase the production amount per unit time, that is, long fibers. The supply of 18 can also be increased.

According to the continuous laminated sheet body manufacturing apparatus described above, the long fibers 18 are formed from the fiber supply mechanism 110 between the first continuous sheet body 12 and the second continuous sheet body 14 that are continuously fed to the stacking mechanism 130. A long fiber entanglement (non-woven layer) composed of long fibers 18 between the first continuous sheet body 12 and the second continuous sheet body 14 at a uniform thickness and a predetermined position by continuously supplying ) 16 can be continuously formed, and as a result, the productivity and yield of the continuously laminated sheet body can be improved.

Next, an apparatus for manufacturing a continuous laminated sheet body as another embodiment according to the present invention will be described with reference to FIG. 7. Here, the same or common configurations as those of the continuous laminated sheet manufacturing apparatus 100 shown in FIGS. 3 to 6 are designated by the same reference numerals, and the description thereof will be omitted again.

As shown in FIG. 7, the continuous laminated sheet body manufacturing apparatus 200 includes a feeding mechanism 220, a stacking mechanism 130, a winding mechanism 140, and an upper surface side of a second continuous sheet body 14 fed by the feeding mechanism 220. The fiber supply mechanism 110 that continuously supplies the long fibers 18 described above is provided.

The feeding mechanism 220 includes, in addition to the first reel 122 and the second reel 124, a lower surface support roller 226 that supports the lower surface side of the material of the second continuous sheet body 14 to be fed. As a result, an inclined transport path E forming an inclined surface toward the fiber supply mechanism 110 is formed between the second reel 124 and the lower surface support roller 226.

According to the manufacturing apparatus 200, the long fibers 18 are placed on the inclined surface of the region of the inclined conveyance path E located in front of the stacking mechanism 130 on the discharge airflow B1 and the lead-in airflow B2 injected from the fiber supply mechanism 110. Be supplied. As a result, in the vicinity of the stacking mechanism 130, a focusing portion 16b is formed in which bundles of a plurality of long fibers 18 are focused with a relatively uniform thickness (that is, the amount of the focused fibers). At this time, it is preferable to form the accompanying airflow B3 along the stacking surface side toward the stacking mechanism 130 by appropriately adjusting the transport speed of the second continuous sheet body 14.

Subsequently, the bundle of the long fibers 18 formed in the focusing portion 16b is continuously sandwiched between the first continuous sheet body 12 and the second continuous sheet body 14 by continuously transporting them in the transport direction F. A continuous long fiber entanglement (nonwoven fabric layer) 16 is formed between the first continuous sheet body 12 and the second continuous sheet body 14. For example, when the second continuous sheet body 14 is formed of a breathable porous sheet material or the like, a support portion (not shown) having a suction function is arranged on the lower surface side of the inclined conveyance path E. As a result, the supplied long fibers 18 can be more reliably laminated on the second continuous sheet body 14.

As described above, the long fibers 18 are continuously provided from the fiber supply mechanism 110 on the inclined surface of the inclined conveyance path E of the second continuous sheet body (lower continuous sheet body) 14 provided in front of the stacking mechanism 130. Since the long fibers 18 that are blown off by the air flow are received on the surface, the long fiber entanglement body (nonwoven fabric layer) 16 can be continuously formed. ..

Although examples according to the present invention and modifications based on the same have been described so far, the present invention is not necessarily limited to these examples. In addition, a person skilled in the art will be able to find various alternative examples and modifications without departing from the gist of the present invention or the appended claims.

10 Continuous laminated sheet body 12 1st continuous sheet body 14 2nd continuous sheet body 16 Long fiber entanglement 18 Long fiber 100, 200 Manufacturing equipment for continuous laminated sheet body 110 Fiber supply mechanism 112 Main body 114 Extruder 114a Cylindrical portion 114b Nozzle 114c Screw 114d Hopper 114e Heater 116 Composite nozzle block 117 Discharge part 117a Discharge port 117b Gas outlet 120 Feeding mechanism 130 Stacking mechanism 140 Winding mechanism

Claims (6)

Continuous sheet material and continuous fiber entangled body composed of long fibers superposition of this at least 10μm or less of the average diameter of the thermoplastic resin and stretching it gave to the discharge air stream formed in the horizontal direction is extruded from a resin nozzle of the extruder It is a manufacturing method of a continuous laminated sheet body sandwiched between
The upper continuous sheet body and the lower continuous sheet body flowing in the long direction and the same direction are gradually brought close to each other from the vertical direction, and the surfaces are overlapped and sent out through between the vertically opposed rolls, and the discharge airflow is sent vertically opposed to each other. A method for producing a continuously laminated sheet body, which comprises giving the drawn air flow formed between the upper continuous sheet body and the lower continuous sheet body in front of the roll. The upper continuous sheet body and the lower continuous sheet body form the pull-in air flow accompanied by an accompanying air flow along the overlapping surface of the upper continuous sheet body and the lower continuous sheet body toward the vertically opposed rolls. The method for manufacturing a continuously laminated sheet body according to claim 1, wherein the continuous laminated sheet body is close to each other from the vertical direction. The method for manufacturing a continuously laminated sheet body according to claim 2, wherein the vertically opposed rolls have a gap so as to allow the accompanying airflow to pass between them. Continuous sheet material and continuous fiber entangled body composed of long fibers superposition of this at least 10μm or less of the average diameter of the thermoplastic resin and stretching it gave to the discharge air stream formed in the horizontal direction is extruded from a resin nozzle of the extruder It is a manufacturing device for a continuous laminated sheet body sandwiched between
The axis of the spout and the air flow nozzles to form the discharge airflow disposed horizontal, and composite nozzle block including a said resin nozzle having a discharge opening in the vicinity of the ejection port,
Including a vertically opposed roll in which an upper continuous sheet body and a lower continuous sheet body flowing in a long direction and in the same direction are gradually brought close to each other from the vertical direction and the surfaces are overlapped and sent out through the space between them.
The composite nozzle block is a continuous laminated sheet body characterized in that the discharge airflow is provided toward a lead-in airflow formed between the upper continuous sheet body and the lower continuous sheet body in front of the vertically opposed rolls. Manufacturing equipment. The upper continuous sheet body and the lower continuous sheet body form the pull-in air flow accompanied by an accompanying air flow along the overlapping surface of the upper continuous sheet body and the lower continuous sheet body toward the vertically opposed rolls. The apparatus for manufacturing a continuously laminated sheet body according to claim 4, wherein the rolls are guided to the vertically opposed rolls. The apparatus for manufacturing a continuously laminated sheet body according to claim 5, wherein the vertically opposed rolls have a gap so as to allow the accompanying airflow to pass between them.