JP2016160558A - Nonwoven fabric production apparatus, nonwoven fabric produced by the same, and nonwoven fabric production method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonwoven fabric production apparatus which allows a fiber arrangement direction in a formed web to be freely set in a range from an arrangement close to a longitudinal arrangement to an arrangement close to a lateral arrangement, and which, with regard to the breadth of the web, can be adapted to a wide item by setting the length of a nozzle array; to provide a nonwoven fabric produced by the same; and to provide a nonwoven fabric production method.SOLUTION: An arrangement direction A of a nozzle array 2 is set to an oblique direction inclined with respect to a web width direction Y orthogonal to a forward direction X of a conveyor 90. In addition, there is provided air flow oscillation means 3 for periodically oscillating a hot air flow direction in a direction (an oscillation direction B) orthogonal to the arrangement direction A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a non-woven fabric manufacturing apparatus that stretches into a filament shape by spraying a thermoplastic molten resin extruded from a nozzle head with hot air, accumulates it on a conveyor, and forms a web by its self-bonding property. The present invention relates to a nonwoven fabric and a nonwoven fabric manufacturing method.

  In this type of non-woven fabric manufacturing apparatus, the molten resin is usually supplied and stretched directly from the nozzle head, accumulated on the conveyor, the formed web has fibers oriented in random directions, and the molecules are also oriented. There is no state. A nonwoven fabric made of such a web cannot be expected to have a significant increase in strength even when stretched.

  On the other hand, a method of arranging the fibers of the web in the vertical direction (for example, see Patent Documents 1 to 5) and a method of arranging the fibers of the web in the horizontal direction (for example, see Patent Documents 6 and 7) are also proposed. Has been. However, these vertical and horizontal arrangements utilize the fact that hot air is blown against an elliptical rotating member and the molten resin is swung in a direction perpendicular to the nozzle row by the Coanda effect.

  Therefore, the width of the web to be formed is particularly narrow when arranged in the lateral direction. Although it is possible to create a high-strength non-woven fabric in which fibers are arranged in two vertical and horizontal directions by combining vertical and horizontal arrangement methods, there is a problem that the width of the non-woven fabric that can be created is limited by the width of the web arranged in the horizontal direction. there were.

JP 2001-140159 A JP 2004-84082 A JP 2004-84083 A JP 2004-84084 A JP 2004-84085 A JP 2001-98455 A JP 2002-249969 A

  Therefore, in view of the above-described situation, the present invention is intended to solve the problem that it is possible to freely set the arrangement direction of the fibers of the formed web from the arrangement close to the vertical arrangement to the arrangement close to the horizontal arrangement, It is in the point which provides the nonwoven fabric manufacturing apparatus which can respond also to a wide thing by setting the length of a nozzle row also about the horizontal width of a web, the nonwoven fabric manufactured by this, and the nonwoven fabric manufacturing method.

  In order to solve the above-described problems, the present invention jets hot air onto a thermoplastic molten resin extruded from a nozzle row, stretches it into a fiber shape, accumulates it on a conveyor, and forms a web by its self-bonding property. In the nonwoven fabric manufacturing apparatus, the direction in which the nozzle rows are arranged is set to an oblique direction inclined with respect to the web width direction perpendicular to the traveling direction of the conveyor, and the direction of the hot air flow is perpendicular to the arrangement direction The non-woven fabric manufacturing apparatus is characterized in that an airflow swinging means for periodically swinging is provided, and the fibers of the web formed thereby are inclined and arranged in the swinging direction.

  Here, the nozzle row is a first nozzle row, a second nozzle row having a different alignment direction is provided, and the direction of the flow of hot air injected to the molten resin extruded from the second nozzle row is Two or more layers having different fiber arrangement directions, each of which is provided with a second airflow swinging means that periodically swings in a direction perpendicular to the direction in which the second nozzle rows are arranged, are made of molten resin extruded from each nozzle row. What manufactures the nonwoven fabric which has this is preferable.

  In particular, it is preferable that the arrangement direction of the second nozzle rows is a web width direction orthogonal to the traveling direction of the conveyor.

  Alternatively, the arrangement direction of the second nozzle rows is an oblique direction similar to the arrangement direction of the first nozzle rows, but in a direction opposite to the arrangement direction of the first nozzle rows with respect to the web width direction. An inclined one is preferable.

  In addition, the nozzle row is configured by providing a plurality of dies having a plurality of nozzles arranged at different positions in the web width direction, and matching the nozzle arrangement direction of each die with the arrangement direction. preferable.

  In particular, it is preferable that the airflow oscillating means is provided at a position corresponding to each die.

  The present invention also relates to a non-woven fabric manufacturing apparatus in which hot air is jetted onto a thermoplastic molten resin extruded from a nozzle row, stretched into a fiber shape, and accumulated on a conveyor to form a web by its self-bonding property. A row is provided with a plurality of dies in which a plurality of nozzles are arranged at different positions in the width direction of the web perpendicular to the moving direction of the conveyor, and the nozzle arrangement direction of each die is made to coincide with the traveling direction of the conveyor. Air flow oscillating means configured to periodically oscillate the flow direction of the hot air in the web width direction perpendicular to the traveling direction of the conveyor, and the web fibers formed thereby are arranged in the web width direction. The nonwoven fabric manufacturing apparatus characterized by being arranged in this was also comprised.

  The present invention also provides a nonwoven fabric produced by the above-described nonwoven fabric production apparatus and having a layer in which fibers are arranged in an inclined manner or a layer arranged in the web width direction.

  Further, the present invention provides a nonwoven fabric manufacturing method in which hot air is jetted onto a thermoplastic molten resin extruded from a nozzle array, stretched into a fiber shape, and accumulated on a conveyor to form a web by its self-bonding property. The row arrangement direction is set to an oblique direction inclined with respect to the web width direction orthogonal to the traveling direction of the conveyor, and the flow direction of the hot air is periodically oscillated in the direction orthogonal to the arrangement direction. There is also provided a non-woven fabric manufacturing method in which an airflow swinging means is provided and the fibers of the web formed thereby are inclinedly arranged in the swinging direction.

  Here, the nozzle row is a first nozzle row, a second nozzle row having a different alignment direction is provided, and the direction of the flow of hot air injected to the molten resin extruded from the second nozzle row is Two or more layers having different fiber arrangement directions, each of which is provided with a second airflow swinging means that periodically swings in a direction perpendicular to the direction in which the second nozzle rows are arranged, are made of molten resin extruded from each nozzle row. It is preferable to produce a nonwoven fabric having

  Further, it is preferable that the nozzle row is configured by providing a plurality of dies having a plurality of nozzles arranged at different positions in the web width direction, and matching the nozzle arrangement direction of each die with the arrangement direction.

  Further, the present invention provides a nonwoven fabric manufacturing method in which hot air is jetted onto a thermoplastic molten resin extruded from a nozzle array, stretched into a fiber shape, and accumulated on a conveyor to form a web by its self-bonding property. A row is provided with a plurality of dies in which a plurality of nozzles are arranged at different positions in the width direction of the web perpendicular to the moving direction of the conveyor, and the nozzle arrangement direction of each die is made to coincide with the traveling direction of the conveyor. Air flow oscillating means configured to periodically oscillate the flow direction of the hot air in the web width direction perpendicular to the traveling direction of the conveyor, and the web fibers formed thereby are arranged in the web width direction. Also provided is a method for producing a nonwoven fabric.

  According to the nonwoven fabric manufacturing apparatus and the nonwoven fabric manufacturing method according to the present invention as described above, the arrangement direction of the nozzle rows is set in an oblique direction inclined with respect to the web width direction orthogonal to the traveling direction of the conveyor, and By providing an airflow oscillating means that periodically oscillates the flow direction of the hot air in a direction orthogonal to the arrangement direction, the fibers of the web can be inclinedly arranged in the oscillating direction. Therefore, the arrangement direction can be appropriately set, the arrangement direction can be freely set from the arrangement close to the vertical arrangement to the arrangement close to the horizontal arrangement, and a high-strength nonwoven fabric can be produced. In addition, the width of the web can be maintained at a sufficient width by setting the length of the nozzle row.

  The nozzle row is a first nozzle row, and a second nozzle row having a different alignment direction is provided, and the flow direction of hot air injected to the molten resin extruded from the second nozzle row is Provided is a second airflow oscillating means for periodically oscillating in a direction orthogonal to the direction in which the second nozzle rows are arranged, and two or more layers having different fiber arrangement directions made of molten resin extruded from each nozzle row are provided. Since the non-woven fabric is manufactured, the second layer arranged in different directions (longitudinal direction / lateral direction / oblique direction) can be laminated on the first layer arranged in an inclined manner by the first nozzle row, The nonwoven fabric which has the combination of various arrangement directions according to a use etc. can be provided.

  For example, if the arrangement direction of the second nozzle row is the web width direction orthogonal to the traveling direction of the conveyor, the nonwoven fabric in which layers arranged in an oblique direction and layers arranged in a vertical direction along the conveyor traveling direction are laminated. Can provide.

  In addition, the arrangement direction of the second nozzle rows is an oblique direction similar to the arrangement direction of the first nozzle rows, but is inclined in a direction opposite to the arrangement direction of the first nozzle rows with respect to the web width direction. If it is set as the direction to do, the nonwoven fabric which laminated | stacked the layer in which the orientation inclined in the mutually opposite direction with respect to the width direction can be provided.

  In addition, since the nozzle row is configured by providing a plurality of dies in which a plurality of nozzles are arranged at different positions in the web width direction, and the nozzle arrangement direction of each die is aligned with the arrangement direction. A sufficiently wide web can be formed while suppressing the number of nozzles per die, the length of the nozzle row, and the space for installing the dies along the conveyor traveling direction. In particular, when the orientation close to the horizontal direction is realized, the number of nozzles, the length of the nozzle row, and the installation space of the die tend to increase, but by arranging a plurality of dies as described above, it is close to the horizontal direction. Even if it is oriented, it becomes possible to produce efficiently.

  In this case, it can be efficiently realized by providing the air flow oscillating means at a position corresponding to each die.

  Also, a plurality of dies having a plurality of nozzles arranged therein are provided at different positions in the web width direction orthogonal to the moving direction of the conveyor, and the nozzle arrangement direction of each die is made to coincide with the traveling direction of the conveyor. The air flow oscillating means that periodically oscillates the direction of hot air flow in the web width direction perpendicular to the traveling direction of the conveyor is provided, so that the web fibers can be arranged in the web width direction (lateral direction). It becomes.

(A) is explanatory drawing which shows the principal part of the nonwoven fabric manufacturing apparatus which concerns on 1st Embodiment of this invention, (b) is a schematic diagram of the condition of the arrangement | sequence of the fiber of the web produced. Explanatory drawing which similarly shows a mode that a fiber rock | fluctuates by the airflow rocking | fluctuation means of a nonwoven fabric manufacturing apparatus. (A) is explanatory drawing which similarly shows the other example of a nonwoven fabric manufacturing apparatus, (b) is a schematic diagram of the condition of the arrangement | sequence of the fiber of the web produced. (A) is explanatory drawing which shows the further another example of a nonwoven fabric manufacturing apparatus similarly, (b) is a schematic diagram of the condition of the arrangement | sequence of the fiber of the web produced. (A) is explanatory drawing which shows the apparatus which produces the web to laminate | stack, (b) is a schematic diagram of the condition of the arrangement | sequence of the fiber of the web produced. (A) is explanatory drawing which shows the principal part of the nonwoven fabric manufacturing apparatus which concerns on 2nd Embodiment of this invention, (b) is a schematic diagram of the condition of the arrangement | sequence of the fiber of the web produced. (A) is explanatory drawing which shows the further another example of a nonwoven fabric manufacturing apparatus similarly, (b) is a schematic diagram of the condition of the arrangement | sequence of the fiber of the web produced. Explanatory drawing which shows the principal part of the nonwoven fabric manufacturing apparatus which concerns on 3rd Embodiment of this invention. Explanatory drawing which shows the principal part of the nonwoven fabric manufacturing apparatus which concerns on 4th Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, based on FIGS. 1-5, 1st Embodiment of this invention is described.

  As shown in FIGS. 1 and 2, the nonwoven fabric manufacturing apparatus 1 according to the present invention sprays hot air onto a thermoplastic molten resin M extruded from a nozzle row 2, stretches it into fibers, and accumulates it on a conveyor 90. The apparatus for forming the web W by its self-bonding property, in particular, the arrangement direction A of the nozzle rows 2 is set to an oblique direction inclined with respect to the web width direction Y orthogonal to the traveling direction X of the conveyor 90 In addition, the present invention is characterized by the provision of airflow oscillating means 3 that periodically oscillates the direction of hot air flow in the direction (oscillation direction B) perpendicular to the alignment direction A.

  As a result, the fibers of the web W accumulated and formed on the conveyor 90 are inclinedly arranged in the swing direction B. In the present invention, the direction A of the nozzle row 2 is set in an oblique direction inclined with respect to the web width direction Y in this way, and the fibers of the formed web W are inclinedly arranged. By bringing the arrangement direction of the nozzle rows closer to the traveling direction X of the conveyor 90, it is possible to obtain a non-woven fabric close to a horizontal arrangement as shown in FIG.

  Specifically, the nozzle row 2 is a row of nozzles (discharge ports 20) that open in the longitudinal direction on the lower surface of the die 4 that discharges molten resin, and is not shown in the resin flow path 21 of the die 4. A polymer line including an extruder and a gear pump is connected to supply molten resin. In this example, an example in which one nozzle row 2 is provided is illustrated, but two or more nozzle rows may be provided in parallel.

  Further, at the front and rear positions along the nozzle row 2 of the die 4 (lateral direction perpendicular to the direction in which the nozzle rows 2 are arranged), the molten resin M extruded from the nozzle row 2 as shown in FIG. Slits (spout ports 51 and 52) for spraying hot air for stretching are opened. A hot air line composed of a compressor or the like (not shown) is connected to the hot air flow path 50 of the die 4.

  Conventionally known die configurations can be widely applied to such nozzle row and hot air slit configurations. In addition, the hot air may be ejected from the slits provided at the front and rear positions of the nozzle row 2 of the die 4 as in this example, or may be provided with a hot air ejecting device configured separately from the die 4. Good.

  Conveyor 90 constitutes a collector that accumulates fibers to form a nonwoven fabric, and is provided with a conveyor drive mechanism (not shown) and a mechanism for sucking fibers with negative pressure. A stretching machine described later and a winder for winding the formed nonwoven fabric are provided. Known configurations can be widely applied to the configurations of these collectors and the like.

  The airflow oscillating means 3 is an application of the airflow oscillating mechanism described in Patent Document 1 described above in this embodiment. Specifically, as described in Patent Document 1, an airflow vibration mechanism in which an elliptical column shape rotates is arranged in parallel with the nozzle row 2 provided with a slant. By rotating this air flow vibration mechanism, a Coanda effect is generated in the air flow of hot air, and the fibers pushed out from the nozzle row 2 are periodically shaken. In this state, the web oriented in the rocking direction is accumulated on the conveyor 90. Will be formed.

  In this example, only one elliptical airflow vibration mechanism as the airflow oscillating means 3 is provided at a position obliquely below and downstream of the conveyor with respect to the die 4. It is also preferable to provide a total of two, one at each of the upstream and downstream positions facing each other diagonally below, to increase the swing width of the swing. In this case, it is only necessary to pull the fibers alternately by rotating the airflow vibration mechanisms with the phases shifted from each other.

  Further, the airflow oscillating means 3 is not limited to using such an airflow oscillating mechanism. In other mechanisms such as those described in Patent Documents 1 to 7, for example, a structure in which a projecting portion is provided on the peripheral wall surface of a rotating cylindrical body, a structure of a rotating body having a square or polygonal cross section, and a rotating body It is possible to apply various other forms such as a structure in which the plate member is swung.

  It is preferable to provide a mechanism that rotatably supports the die 4 so that the angle of the die 4 can be changed and adjusted so that the arrangement direction (A) of the nozzle rows 2 can be appropriately changed. As such a rotation support mechanism, the die rotation support mechanism described in Japanese Patent No. 5626301 and Japanese Patent No. 5626409 can be used. Thus, when providing the rotation support mechanism of the die | dye 4, it is preferable to also set it as the mechanism which supports the air current rocking | swiveling means 3 arrange | positioned in parallel with the die | dye 4 also integrally.

  Further, the rotation support mechanism of the die 4 is a support mechanism that rotates about an axis perpendicular to the surface of the conveyor 90 that passes through the center of the nozzle row 2, and the position of the axis is the center position in the width direction of the conveyor 90. In this case, for example, when the die 4 is inclined by an angle α with respect to the web width direction Y as shown in FIG. Therefore, the center position is shifted to one side by (L / 2) sin α. Therefore, it is preferable to provide a mechanism capable of moving the die 4 and the airflow oscillating means 3 integrally in the web width direction as a mechanism capable of adjusting such deviation.

  As another method, the rotation support mechanism is a mechanism for integrally rotating both the die 4 and the airflow oscillating means 3, and the rotation center axis is changed from the center position of the nozzle row 2 to the nozzle row. Regardless of the inclination angle of the nozzle row 2, if the rotation center axis is set at the center position in the conveyor width direction by shifting the position in the horizontal direction by L / 2 in the direction B orthogonal to the arrangement direction A, The center position of the web W and the conveyor 90 can be matched.

  The webs W accumulated and formed on the conveyor 90 are preferably stretched in an oblique arrangement direction because the arrangement can be improved and the strength of the web can be further increased. In the case of the inclined array as in the present invention, it is efficient to use a biaxial stretching apparatus that stretches the web at the same time as the stretching means for stretching the web. Of course, you may make it extend | stretch sequentially in a vertical direction and a horizontal direction.

  FIG. 3 shows an apparatus configuration for manufacturing a nonwoven fabric by inclining the arrangement direction of the nozzle rows 2 in the direction opposite to the direction of FIG. 1 with respect to the web width direction. The non-woven fabric produced in this way is the same as that shown in FIG.

  Moreover, FIG. 4 has shown the apparatus form which manufactures a nonwoven fabric by inclining the row direction of the nozzle row 2 further from the direction of FIG. The nonwoven fabric produced in this way can have the fiber arrangement direction more in the web width direction (lateral direction) than that in FIG. However, in order to manufacture a nonwoven fabric having the same width, a die having a longer nozzle row is required.

  A laminate of a plurality of webs in which fibers are arranged in different directions is also preferable. In this case, it is also preferable that the respective webs are stretched in the arrangement direction and then laminated. It can also be stretched vertically and horizontally after lamination. Further, as in the conventional case, a web in which fibers are arranged in the longitudinal direction is formed as shown in FIG. 5, and the web is laminated with a web that is arranged in an inclined manner as shown in FIGS. Also in this case, the layers can be laminated after being stretched, or can be stretched vertically and horizontally after the lamination.

  Next, based on FIG.6 and FIG.7, 2nd Embodiment is described.

  As shown in FIG. 6, in the present embodiment, in addition to the nozzle row 2 (first nozzle row) inclined with respect to the web width direction described in the first embodiment, a second arrangement direction is different from this. The nozzle row 2A is also provided. Similar to the air flow swinging means 3 for the nozzle row 2, the second nozzle row 2A indicates the direction of the flow of hot air injected into the molten resin extruded from the second nozzle row 2A of the second nozzle row 2A. There is provided a second airflow swinging means 3A that periodically swings in a direction orthogonal to the arrangement direction.

  In this example, the 2nd nozzle row 2A is made into the alignment direction along the web width direction like the past, the web in which the fiber was arranged in the lengthwise direction is formed, and this web is the 1st nozzle row 2 A web arranged in a plurality of vertical and diagonal directions is formed on the same collector. This may be used as a product as it is, but it can also be extended vertically and horizontally.

  The second nozzle row 2A is formed on the lower surface of the second die 4A. For the second die 4A and the polymer line and hot air line connected to the die 4A, the rotation support mechanism of the die 4A, the configuration of the airflow oscillating means 3A, and other modifications, the first nozzle row 2 is configured. Since the die 4 and the airflow oscillating means 3 are the same as those described in the first embodiment, the description thereof is omitted.

  Various combinations of the inclination of the first nozzle row 2 with respect to the web width direction and the arrangement direction of the second nozzle row 2A are possible. For example, as shown in FIG. It is also preferable to tilt the first nozzle row 2 in the direction opposite to the direction in which the first nozzle rows 2 are arranged. A web formed by such a combination is a combination of webs in which the fiber array is inclined in the opposite direction. In this case, a nonwoven fabric having high stretchability in the transverse direction, which is the width direction of the web, is obtained.

  According to the present embodiment, compared to stacking webs formed on separate conveyors, the step of raising the temperature to near the melting point for joining can be omitted, which is more efficient. Such a nonwoven fabric of this embodiment can also increase the longitudinal and transverse tensile strength by biaxial stretching, and in addition, the longitudinal and transverse stretchability can be secured.

  The second nozzle row 2A is arranged on the downstream side in the conveyor traveling direction X with respect to the first nozzle row 2; Further, it is also preferable to form a web in which a single or a plurality of nozzle rows in different arrangement directions are combined and laminated.

  Next, a third embodiment of the present invention will be described based on FIG.

  In this embodiment, a plurality of dies 4 and 4 in the same direction are arranged in different directions in the web width direction with the direction of the nozzle row being slanted, thereby suppressing the length of one die. However, the nonwoven fabric which has a certain width | variety by the arrangement | sequence close to a horizontal direction can be provided. If the arrangement of the fibers is made closer to the horizontal arrangement, the die tends to be long as in the example shown in FIG. 4 of the first embodiment described above, which is not practical in manufacturing the device. Therefore, by configuring the nozzle row with a plurality of dies 4 as in the present embodiment, it is possible to obtain a wide fiber array nonwoven fabric with an array close to a horizontal array.

  Although the airflow oscillating means 3 is provided at a position corresponding to the die 4, the common airflow oscillating means 3 can be provided as long as the dies 4 are arranged on the same straight line. In this example, the dies 4 are arranged at positions shifted in the conveyor movement direction, but can be arranged at the same position.

  In addition, about each die | dye 4, the polymer line connected to the die | dye 4, a hot air line, a rotation support mechanism, the structure of the air current rocking | swiveling means 3, other modifications, lamination | stacking, extending | stretching of webs, extending | stretching etc. in 1st Embodiment. Since it is the same as the structure etc. which were demonstrated, the description is abbreviate | omitted.

  Next, a fourth embodiment of the present invention will be described based on FIG.

  In the present embodiment, a plurality of dies 4B in which the arrangement direction of the nozzle rows 2B is parallel to the conveyor traveling direction X are respectively arranged at different positions in the web width direction, and the air flow oscillating means 3B is provided corresponding to each die 4B. The fibers of the provided web W are arranged in the web width direction, that is, in the lateral direction. In this example, the dies 4B are arranged at positions shifted in the conveyor movement direction, but can be arranged at the same position.

  In addition, about each die 4B, the polymer line connected to the die 4B, the hot air line, the rotation support mechanism, the structure of the air flow rocking means 3B, other modifications, lamination of the webs, stretching, etc. in the first embodiment Since it is the same as the structure etc. which were demonstrated, the description is abbreviate | omitted.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Nonwoven fabric manufacturing apparatus 2, 2A, 2B Nozzle row 3, 3A, 3B Air flow rocking means 4, 4A, 4B Die 20 Discharge port 21 Resin flow channel 50 Hot air flow channel 51 Injection port 90 Conveyor M Molten resin W Web

Claims (13)

In the non-woven fabric manufacturing apparatus in which hot air is sprayed onto a thermoplastic molten resin extruded from a nozzle row and stretched into a fiber shape, and accumulated on a conveyor to form a web by its self-bonding property.
While setting the arrangement direction of the nozzle rows in an oblique direction inclined with respect to the web width direction orthogonal to the traveling direction of the conveyor,
An air flow oscillating means for periodically oscillating the flow direction of the hot air in a direction perpendicular to the arrangement direction;
Accordingly, the nonwoven fabric manufacturing apparatus is characterized in that the fibers of the web are inclinedly arranged in the swing direction. The nozzle row is a first nozzle row, and a second nozzle row having a different alignment direction is provided, and
There is provided a second air flow oscillating means for periodically oscillating the direction of the flow of hot air injected to the molten resin extruded from the second nozzle row in a direction perpendicular to the direction in which the second nozzle rows are arranged. ,
The nonwoven fabric manufacturing apparatus of Claim 1 which manufactures the nonwoven fabric which has a 2 or more layer from which the fiber arrangement direction differs which consists of molten resin extruded from each nozzle row | line | column.   The nonwoven fabric manufacturing apparatus according to claim 2, wherein the arrangement direction of the second nozzle rows is a web width direction orthogonal to the traveling direction of the conveyor.   The arrangement direction of the second nozzle rows is an oblique direction similar to the arrangement direction of the first nozzle rows, but is inclined in a direction opposite to the arrangement direction of the first nozzle rows with respect to the web width direction. The nonwoven fabric manufacturing apparatus according to claim 2.   The nozzle array is configured by providing a plurality of dies having a plurality of nozzles arranged at different positions in the web width direction, and matching the nozzle arrangement direction of each die with the arrangement direction. Nonwoven fabric manufacturing equipment.   The nonwoven fabric manufacturing apparatus according to claim 5, wherein the airflow oscillating means is provided at a position corresponding to each die. In the non-woven fabric manufacturing apparatus in which hot air is sprayed onto a thermoplastic molten resin extruded from a nozzle row and stretched into a fiber shape, and accumulated on a conveyor to form a web by its self-bonding property.
The nozzle row includes a plurality of dies in which a plurality of nozzles are arranged at different positions in the web width direction orthogonal to the moving direction of the conveyor, and the nozzle arrangement direction of each die is the traveling direction of the conveyor. Configured to match,
An airflow swinging means for periodically swinging the flow direction of the hot air in the web width direction orthogonal to the traveling direction of the conveyor;
Thereby, the fibers of the web are arranged in the web width direction.   The nonwoven fabric which is manufactured with the nonwoven fabric manufacturing apparatus of any one of Claims 1-6, and has the layer by which the fiber was inclined-arranged.   The nonwoven fabric which is manufactured with the nonwoven fabric manufacturing apparatus of Claim 7, and has the layer by which the fiber was arranged in the web width direction. In the non-woven fabric manufacturing method in which hot air is jetted into a thermoplastic molten resin extruded from a nozzle row, stretched into a fiber shape, and accumulated on a conveyor to form a web by its self-bonding property.
While setting the arrangement direction of the nozzle rows in an oblique direction inclined with respect to the web width direction orthogonal to the traveling direction of the conveyor,
An air flow oscillating means for periodically oscillating the flow direction of the hot air in a direction perpendicular to the arrangement direction;
Thus, a nonwoven fabric manufacturing method in which the fibers of the web are inclinedly arranged in the swing direction. The nozzle row is a first nozzle row, and a second nozzle row having a different alignment direction is provided, and
There is provided a second air flow oscillating means for periodically oscillating the direction of the flow of hot air injected to the molten resin extruded from the second nozzle row in a direction perpendicular to the direction in which the second nozzle rows are arranged. ,
The nonwoven fabric manufacturing method of Claim 10 which manufactures the nonwoven fabric which has a 2 or more layer from which the fiber arrangement direction differs which consists of molten resin extruded from each nozzle row | line | column.   11. The nozzle row is configured by providing a plurality of dies each having a plurality of nozzles arranged at different positions in the web width direction, and aligning the nozzle arrangement direction of each die with the arrangement direction. Nonwoven fabric manufacturing method. In the non-woven fabric manufacturing method in which hot air is jetted into a thermoplastic molten resin extruded from a nozzle row, stretched into a fiber shape, and accumulated on a conveyor to form a web by its self-bonding property.
The nozzle row includes a plurality of dies in which a plurality of nozzles are arranged at different positions in the web width direction orthogonal to the moving direction of the conveyor, and the nozzle arrangement direction of each die is the traveling direction of the conveyor. Configured to match,
An airflow swinging means for periodically swinging the flow direction of the hot air in the web width direction orthogonal to the traveling direction of the conveyor;
The nonwoven fabric manufacturing method which arranges the fiber of the said web in the said web width direction by this.

Images