JP2015014065A - Spinneret assembly for melt-blown - Google Patents

Abstract

A high-performance fiber product can be obtained by accurately and stably mixing and spinning a plurality of fibers made of a plurality of resins having different or the same type and different physical properties, and can be easily manufactured and kept at a low manufacturing cost. Further, a spinneret device for a melt blown having excellent maintainability is provided. A resin supply die having supply holes 20 and 21 through which a plurality of resin melts A and B having different or different physical properties are supplied. 10 and the supply holes 20 and 21, and the introduction holes 22 and 23 that are spaced apart from each other and extend in parallel, and the introduction holes 22 and 23, and a plurality of resin melts A and B are discharged and spun. A melt blown spinneret device 1 for producing a fiber product by mixing a plurality of fibers made of a plurality of resins, comprising a base 11 having a plurality of spinning holes 24. [Selection] Figure 1

Description

  The present invention relates to a melt blown spinneret device for producing a fiber product such as a nonwoven fabric by mixing a plurality of fibers made of a plurality of resins having different or the same kind and different physical properties.

  A melt blown spinning method is known as one of typical manufacturing methods for fiber products such as nonwoven fabrics. According to the melt blown spinning method, a melt blown comprising a die having a plurality of spinning holes arranged linearly at predetermined intervals in the longitudinal direction, hot air jet slits provided on both sides of the die, and a collection net The spinneret device is used to discharge the resin melt from a plurality of spinning holes to spin (fibrosis), and the resulting fibers are drawn by hot air and stretched, and then the fibers are collected on the repair net. By doing, a nonwoven fabric is manufactured. The melt blown spinning method has many advantages such as high production efficiency because it can obtain ultrafine fibers with a fiber diameter of 10 μm or less, and can perform spinning and non-woven fabric production continuously. ing.

  In addition, recently, in order to produce a high-performance nonwoven fabric while taking advantage of the characteristics of the melt blown spinning method, for example, a plurality of fibers made of different resins such as polypropylene and polyethylene terephthalate, and physical properties such as viscosity of the melt. The melt-blown blend spinning method, which simultaneously spins and blends a plurality of fibers made of a plurality of different resins, has attracted more attention than ever before.

  Conventionally, various melt blown spinneret devices have been proposed. For example, Patent Document 1 and Patent Document 2 disclose a plurality of spinning holes for discharging and spinning a resin melt, and one introduction hole communicating with the spinning holes and alternately storing two different types of resin melts. And a melt-blown spinneret including the die. According to this apparatus, a fiber having a side-by-side (double layer) type or a sea core (core-sheath) type in cross-sectional view can be obtained. However, even if this apparatus is used, it is not possible to mix a plurality of fibers made of different resins by changing the material (resin type) of the fibers discharged for each spinning hole.

  Patent Document 3 is a base plate having a substantially inverted triangle shape in cross-sectional view, and the lower apex angle of the inverted triangle shape is a tip portion, and is provided at a line-symmetrical position with respect to the center line of the base plate. The two supply holes (reservoir chambers) for storing melts of two different types of resins and one end communicated with one or the other supply hole and obliquely so as to be close to the center line from the position of the supply hole The meltblown blended fiber yarn includes a base plate provided with a spinneret that has two inlet holes extending in the interior thereof, and a spout that is connected to the inlet hole to discharge and spin the resin melt. A base device is disclosed.

  In Patent Document 3, the width of the tip of the base plate is made larger than the diameter of the introduction hole, so that the traveling direction of the fiber discharged from the spinneret changes from an oblique direction to a vertical direction, and the fiber is configured. It is described that the fiber contacts with the high-speed air stream in a state where the resin melt to be solidified is a little, so that mixed fiber spinning without yarn breakage or shot is possible. However, since the fiber spinning direction (resin melt discharge direction) in the apparatus is strictly an oblique direction, the direction of the fiber traveling immediately below the tip of the base plate and the direction of the accompanying airflow accompanying the high-speed airflow are both different. Above, it is not symmetrical about the centerline. Accordingly, there is a problem that turbulent airflow is likely to occur at the tip end portion of the base plate, and the fiber lump is likely to occur due to fusion between fibers before being sufficiently stretched.

  Patent Document 4 has a recess, a spinning introduction hole communicating with the depression, a base plate having a spinning hole communicating with the spinning introduction hole, and two introduction grooves extending obliquely away from each other from the side surface to the bottom surface, A distribution member housed in the recess of the base, and two supply grooves provided on both sides in the width direction of the upper portion of the base plate, surrounded by the inner wall surface of the recess of the base plate and the side wall surface of the distribution member, A melt blown spinneret apparatus comprising: In the apparatus, two different types of resin melts are supplied to each supply groove, and these resin melts are discharged from the spinning hole through the introduction groove and the spinning introduction hole and are spun. Patent Document 4 describes that the mixed fiber pattern can be changed by changing the shape of the introduction groove in the apparatus.

  However, in the apparatus, the flow of the resin melt in the supply groove is slower than the flow of the resin melt in the introduction groove, so that the resin melt inevitably stays in the supply groove and the resin deteriorates. There is a problem that it becomes easy. The deterioration of the resin may reduce the properties, quality, appearance, and the like of the obtained fiber. Further, Patent Document 4 includes an embodiment in which the introduction groove is extended to the upper part of the distribution member and the resin melt is directly supplied to the introduction groove. In this embodiment, it is required that the entire inner wall surface of the recess of the base plate and the entire side wall surface excluding the portion where the introduction groove of the distribution member is formed be closely adhered. However, since the base plate and the distribution member are both long in one direction and the area of the surface to be in contact with both is large, actual processing is very difficult, increasing the processing cost and leaving a gap. Cannot be avoided. In this gap, the resin melt flows and stays, and the yield of the raw material is reduced. Further, there is a possibility that the melt containing the deteriorated resin staying in the gap flows into the spinning introduction hole and the spinning hole through the introduction groove or clogs the spinning hole which is a small diameter hole.

JP 60-99057 A JP 60-99058 A Japanese Patent No. 2847266 Japanese Patent No. 3360377

  Therefore, in view of the above-mentioned situation, the present invention intends to solve a high-performance fiber product by accurately and stably mixing and spinning a plurality of fibers made of a plurality of resins of different types or of the same type and having different physical properties. The object of the present invention is to provide a melt-blown spinneret device that can be obtained, is easy to manufacture, has a low manufacturing cost, and is excellent in maintainability.

  As a result of intensive investigations in view of the present situation, the present inventors have provided a plurality of supply holes for receiving the supply of the resin melt from the outside in the melt blown spinneret device, and discharged the supply holes and the resin melt. As the introduction holes connecting the spinning holes to be spun, a plurality of introduction holes that are separated from each other and extend substantially in parallel are provided in the base, and a plurality of resin melts are supplied from the plurality of supply holes to the plurality of introduction holes. By configuring as described above, it has been found that a spinneret for melt blown that satisfies the object of the present invention can be obtained, and the present invention has been completed.

  That is, the present invention is a melt blown spinneret device for producing a fiber product by mixing a plurality of fibers (hereinafter simply referred to as “plural resins”) made of a plurality of resins having different or the same kind and different physical properties. A resin supply die having a plurality of supply holes to which a plurality of resin melts are supplied, a plurality of introduction holes communicating with the supply holes and spaced apart from each other and extending substantially in parallel; and A melt blown spinneret device comprising a spinneret having a plurality of spinning holes for discharging and spinning a plurality of resin melts.

  In the spinneret for melt blown of the present invention, the base includes a base body having a plurality of spinning holes and recesses, and a distribution member having the plurality of introduction holes and detachably accommodated in the recesses of the base body. It is preferable to comprise so that it may be provided.

  In the spin-on device for a melt blown of the present invention, a plurality of resins supplied from the supply holes provided on at least one boundary surface of the resin supply die and the boundary surface of the resin supply die with the resin supply die. It is preferable that a first melt distribution path for distributing the melt to the predetermined introduction hole is provided.

  In the spin-on device for a melt blown of the present invention, a plurality of resins introduced from the introduction holes provided on at least one boundary surface of the distribution member and the boundary surface of the distribution body with the distribution body. It is preferable to provide a second melt distribution path for distributing the melt to predetermined spinning holes.

  Another embodiment of a melt blown spinneret device joins a plurality of resin melts provided on at least one of the boundary surface of the resin supply die with the base and the boundary surface of the base with the resin supply die. It is preferable that a merging means is provided. Further, the melt blown spinneret device of another embodiment includes a boundary surface with a distribution member in a resin supply die, a boundary surface with a resin supply die in a distribution member, a boundary surface with a base body in the distribution member, and a distribution member in the base body. It is preferable that a merging means provided on at least one boundary surface of the boundary surface for merging a plurality of resin melts is preferably provided.

  In another form of the melt blown spinneret, the apparatus may further include a merging preventing unit that is provided on the boundary surface where the merging unit is provided so as to be mixed with the merging unit, and that prevents the merging of a plurality of resin melts. Further preferred.

  In a melt blown spinneret device of another form, a predetermined introduction of melts of a plurality of resins supplied from supply holes provided on a boundary surface other than the boundary surface provided with the merging means or the merging means and the merging prevention means It is preferable to provide a first melt distribution path that distributes to the holes or a second melt distribution path that distributes a plurality of resin melts introduced from the introduction holes to the predetermined spinning holes.

  According to the present invention as described above, a resin supply die having a plurality of supply holes to which a plurality of resin melts are supplied, and a plurality of introduction holes communicating with the supply holes and spaced apart from each other and extending in parallel. And a base having a plurality of spinning holes that are spun by discharging a plurality of resin melts and communicating with the introduction holes, thereby forming a plurality of the plurality of introduction holes into the plurality of introduction holes. The resin melt can be easily distributed, and the introduction hole can be provided so that the flow direction of the resin melt in the introduction hole substantially coincides with the direction in which the resin melt is discharged from the spinning hole. In addition, since the gas for stretching the fiber from a direction almost symmetrical to the resin melt discharged from the spinning hole can be injected, the generation of fiber mass due to fusion between the fibers and the unevenness of the fiber diameter, Air chewing Without causing only like, can achieve high accuracy and stable commingled various functions is given, it can be produced fiber products such as high performance nonwoven. Furthermore, since a plurality of resin melts can be configured to flow substantially in one direction inside the die, the resin melt stays and the resin deterioration accompanying it is remarkably suppressed, and material loss and spinning hole clogging occur. Can be prevented.

  Further, in this configuration, the die has a plurality of spinning holes at the tip thereof, and only needs to satisfy the requirement that the introduction holes are spaced apart from each other and pass through the inside thereof in parallel. Since the degree of freedom increases and the die can be designed in a shape that is easy to manufacture, the manufacturing is easy and the manufacturing cost can be kept low.

  In the present invention, a base body having a plurality of spinning holes and recesses, a distribution member that has a plurality of introduction holes and is detachably accommodated in the recesses of the base body, constitutes a base, and includes a supply hole The resin melt is supplied to the introduction hole passing through the inside of the distribution member, so that even if there is a slight gap between the recess of the base body and the distribution member, the resin melt flows into the gap. Therefore, the design freedom of the base body and the distribution member is remarkably increased. As a result, the base body (particularly, the concave portion) and the distribution member can be formed into a three-dimensional shape that can be easily processed using many orthogonal planes, thereby further reducing the manufacturing cost. Furthermore, since the distribution member can be configured to be detachable from the concave portion of the base body, the maintainability is remarkably improved.

  In the present invention, at least one boundary surface of the resin supply die with the base and the boundary surface of the base with the resin supply die, a plurality of resin melts supplied from the supply holes are supplied to the predetermined introduction holes. By providing the first melt distribution path for distribution, it is possible to more easily and more smoothly distribute the resin melt from the supply hole to the introduction hole. Spinning a plurality of fibers made of a plurality of resins to adjust the arrangement and content of each of the plurality of fibers in the resulting fiber product, and to produce a fiber product having predetermined characteristics and appearance Can do.

  In the present invention, at least one boundary surface of the distribution member with the base body and the boundary surface of the base body with the distribution member, a plurality of resin melts introduced from the introduction holes are supplied to the predetermined spinning holes. By providing the second melt distribution path for distribution, the fiber mixture pattern of a plurality of fibers made of a plurality of resins can be freely changed, and a fiber product having predetermined characteristics and appearance can be easily manufactured.

  Further, in the present invention, a plurality of resin melts provided on at least one of the boundary surface between the resin supply die and the die together with the resin supply die and the boundary surface between the die and the resin supply die. A melt blown spinneret device having a joining means for joining together, a resin supply die, a base composed of a base body and a distribution member, a boundary surface between the distribution member in the resin supply die, and a resin supply in the distribution member A melt blown spinneret device of another form provided with the above merging means provided on at least one of the boundary surface with the die, the boundary surface with the base body of the distribution member, and the boundary surface with the distribution member of the base body. By configuring, it becomes possible to spin side-by-side fibers made of a plurality of resins, and a plurality of resins Becomes the resin species of different side-by-side type fibers containing RaNarikatsu can be commingled, it is possible to impart different functions to the obtained textile product. For example, when a plurality of resin melts having different solidification temperatures are used, one side solidifies and then the other solidifies, so that side-by-side fibers that are curled and bulky are obtained.

  In another form of the spinneret for a melt blown apparatus, a confluence preventing means for preventing the joining of a plurality of resin melts together with the joining means is provided on the boundary surface where the joining means is provided. Fibers made of resin species and side-by-side fibers can be mixed, and further functions can be imparted to the resulting fiber product.

  In another form of the spinneret for a melt blown, the first melt distribution path and / or the second melt distribution is provided on a boundary surface other than the boundary surface where the merge means or the merge means and the merge prevention means are provided. Combining, arranging and content of a plurality of side-by-side fibers composed of a plurality of resins and different resin types, or a fiber composed of a single resin species, in the resulting fiber product by comprising a path. Etc. can be adjusted as appropriate, and a fiber product having various characteristics and appearance can be easily obtained.

It is sectional drawing which shows typically the structure of the principal part of the spinneret for melt blown which is 1st Embodiment of this invention. It is a top view which shows typically the structure of a 1st melt distribution path. It is a top view which shows typically the structure of the modification of a 1st melt distribution path. It is a top view which shows typically the structure of the distribution member of another form. It is drawing which shows typically the connection of the introduction hole of a distribution member, and the spinning hole of a nozzle | cap | die plate. It is drawing which shows typically the connection of another form with the introduction hole of a distribution member, and the spinning hole of a nozzle | cap | die plate. It is sectional drawing which shows typically the structure of the 2nd melt distribution path of another form. It is sectional drawing which shows typically the structure of the principal part of the spinneret for melt blown which is 2nd Embodiment of this invention. It is sectional drawing which shows typically the structure of the principal part of the spinneret for melt blown which is 3rd Embodiment of this invention. It is sectional drawing which shows typically the structure of the principal part of the spinneret for melt blown which is 4th Embodiment of this invention. It is sectional drawing which shows typically the structure of the principal part of the spinneret for melt blown which is 5th Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view schematically showing a configuration of a main part of a melt blown spinneret device 1 according to a first embodiment of the present invention. The melt blown spinneret device 1 is a device that is long in one direction, and FIG. 1 is a cross-sectional view in the width direction. FIG. 2 shows the configuration of the first melt distribution path 26 provided on the boundary surface (introduction hole inlet side surface 12a) of the distribution member 12 with the resin supply die 10 provided in the melt blown spinneret 1 shown in FIG. It is a top view showing typically. FIG. 3 is a top view schematically showing the configuration of modified examples 26A to 26D of the first melt distribution path. FIG. 4 is a top view schematically showing the configuration of another form of the distribution member 12C. FIG. 5 is a drawing schematically showing the connection between the introduction holes 22 and 23 of the distribution member 12 and the spinning holes 24 of the base body 11. FIG. 6 is a drawing schematically showing another form of connection between the introduction holes 22 and 23 of the distribution member 16 and the spinning holes 24 of the base body 11. FIG. 7 is a cross-sectional view schematically showing the configuration of another form of the second melt distribution path 28 provided at the boundary surface between the base body 11 and the distribution member 12.

  A melt blown spinneret 1 shown in FIG. 1 includes a resin supply die 10 having a plurality of supply holes 20 and 21 for receiving resin melts A and B from the outside, and a recess 25 having a substantially T-shaped cross section. And a base body 11 having a plurality of spinning holes 24 for discharging and spinning the resin melts A and B, and a distribution member 12 that is substantially T-shaped in cross section and is fitted into the recess 25 of the base body 11 without any gap. One end communicates with the supply holes 20 and 21 and the other end communicates with the plurality of spinning holes 24. The resin melts A and B supplied from the supply holes 20 and 21 are separated from each other and extend substantially in parallel. A plurality of introduction holes 22, 23 for introducing a plurality of introduction holes 22 into the spinning hole 24, and a fiber composed of a resin melt A, B discharged from the spinning hole 24 of the base body 11. Hot air is supplied from a predetermined angle to stretch the fiber. The hot air jet slits 13 and 14, the slit width adjusting plate 15 for adjusting the slit width of the hot air jet slits 13 and 14, hot air generating means (not shown) for supplying hot air to the hot air jet slit, and the stretched fiber And a conveyor (not shown) for accumulation.

  The resin supply die 10 has a plurality of supply holes 20 and 21 that penetrate the resin supply die 10 in the thickness direction. In the supply hole inlet side surface 10 a, the inlets of the plurality of supply holes 20, 21 are arranged in a line substantially linearly at predetermined intervals in the longitudinal direction of the resin supply die 10. And the row of inlets of the supply holes 21 are substantially parallel. On the supply hole outlet side surface 10b, the outlets of the plurality of supply holes 20, 21 are arranged in the same manner as these inlets. Resin melts A and B obtained by melting the resins A and B with an extruder or the like are supplied to the supply holes 20 and 21, respectively. Here, the resins A and B are two different resins. The different resins are different resins or the same kind of resins having different physical properties. Here, although it does not specifically limit as a physical property, For example, physical physical properties, such as a viscosity, a melting temperature, a softening point, various mechanical physical properties, etc. are mentioned.

  In the present embodiment, the plurality of supply holes 20 and 21 are configured as described above. However, the present invention is not limited to this. For example, the supply holes 20 and 21 are connected to the inlets on the supply hole inlet side surface 10a. Thus, a groove extending in the longitudinal direction of the resin supply die 10 may be formed. The resin melts A and B supplied to the two grooves are supplied to the introduction holes 22 and 23 through the supply hole 20 connected to one groove and the supply hole 21 connected to the other groove, respectively.

In the present embodiment, the base body 11 and the distribution member 12 constitute a base.
The base body 11 is disposed so as to be in contact with the supply hole outlet side surface 10b of the resin supply die 10, and has a plate portion having a substantially plate shape in cross section having an introduction hole inlet side surface 11a in contact with the supply hole outlet side surface 10b; The plate portion has a substantially central portion in the width direction of the surface 11b opposite to the inlet hole inlet-side surface 11a. The plate portion is continuously connected to the plate portion, extends in a direction away from the plate portion, and has a substantially pentagonal sectional view. It consists of a certain protrusion. A concave portion 25 having a substantially T-shaped cross-sectional view is formed at a substantially central portion in the width direction of the introduction hole inlet-side surface 11a of the plate portion, and a base body is provided at the tip portion 11d that is the most distant from the plate portion of the protruding portion. A plurality of spinning holes 24 are linearly arranged at a predetermined interval in the longitudinal direction of 11 (protrusion).

  The distribution member 12 has a substantially T-shape when viewed in cross section, and is fitted into the recess 25 of the base body 11 with almost no gap. At one end, the surface of the T-shaped short side portion (introduction hole inlet side surface 12a) forms the same surface as the inlet side surface 11a of the base body 11, and the supply hole of the resin supply die 10 is provided. The inlet side surface 10b is in contact with the outlet side surface 10b, and the introduction hole outlet side surface 12b is in contact with the spinning hole inlet side surface 11c of the base body 11 at the other end. By configuring in this way, the introduction hole inlet side surface 12a, the introduction hole outlet side surface 12b of the distribution member 12, the supply hole outlet side surface 10b of the resin supply die 10, and the spinning hole inlet side surface 11c of the base body 11 are formed. Since each of the surfaces can be finished with high accuracy, there is an advantage that the resin melts A and B can be reliably prevented from leaking at the contact portions of the respective surfaces.

  The distribution member 12 is formed with introduction holes 22 and 23 that are spaced apart from each other and extend substantially in parallel and pass through the distribution member 12. As shown in FIG. 2, the inlets of the introduction holes 22 and 23 are alternately and linearly arranged in the longitudinal direction of the distribution member 12 at the center in the width direction of the introduction hole inlet side surface 12 a of the distribution member 12. . Further, as shown in FIG. 5A described later, also on the introduction hole outlet side surface 12b of the distribution member 12, the outlets of the introduction holes 22 and 23 correspond to the inlet side surface 12a in the longitudinal direction of the distribution member 12. Are alternately arranged in a straight line.

  With this configuration, since the resin melts A and B pass through the introduction holes 22 and 23 formed in the distribution plate 12, there is a slight gap between the distribution member 12 and the recess 25. However, the resin melts A and B do not flow into the gap. Thereby, the freedom degree of shape of the base body 11 (particularly the recess 25) and the distribution member 12 is increased, the base body 11 and the distribution member 12 can be easily processed, and the manufacturing cost can be significantly reduced. Moreover, since the distribution member 12 can be configured to be detachable from the concave portion 25, the maintainability of the melt blown spinneret device 1 as a whole can be remarkably enhanced. In addition, since the flow direction of the resin melts A and B in the introduction holes 22 and 23 and the discharge direction of the resin melt from the spinning hole 24 described later can be set to substantially coincide with each other, spinning can be performed more smoothly and more smoothly. It can be implemented stably.

  The boundary surface (introduction hole inlet side surface 12a) of the distribution member 12 with the resin supply die 10 is provided with the first melt distribution path 26 together with the inlets of the introduction holes 22 and 23. 23 are respectively connected to the supply holes 20 and 21 of the resin supply die 10 so as to receive the selective supply (distribution) of the resin melts A and B.

  The first molten liquid distribution path 26 is provided so as to extend substantially in parallel with the longitudinal direction of the distribution member 12 except for a peripheral portion of a predetermined width from both ends in the width direction of the inlet hole inlet side surface 12a of the distribution member 12. The melt receiving grooves 30a and 30b having a predetermined width for receiving the supply of the resin melts A and B from the holes 20 and 21 and the introduction holes 22 and 23 branch from the melt receiving grooves 30a and 30b in the width direction of the distribution member 12. And connecting grooves 31a and 31b connected to the inlet of the. The melt receiving grooves 30 a and 30 b and the connecting grooves 31 a and 31 b are separated from each other by a separation partition wall 32. Since the melt receiving grooves 30a and 30b and the connecting grooves 31a and 31b are configured to be lower than the peripheral edge of the introduction hole inlet side surface 12a of the distribution member 12 and the separation partition wall 32, the resin melt A , B are prevented from joining.

  According to the first melt distribution path 26, the resin melts A and B supplied from the supply holes 20 and 21 to the melt receiving grooves 30a and 30b flow through the connecting grooves 31a and 31b, respectively, and the introduction holes 22 and 23. It is configured to reach the entrance. The first melt distribution path 26 allows the resin melts A and B to be easily and smoothly distributed from the supply holes 20 and 21 to the introduction holes 22 and 23, and is composed of a plurality of resins A and B. It is possible to mix different fibers A and B in a predetermined pattern, and to adjust the arrangement and content of the fibers A and B in the obtained fiber product. Can be produced.

  FIGS. 3A to 3D show first melt distribution paths 26 </ b> A to 26 </ b> D that are modifications of the first melt distribution path 26. In these embodiments, as will be described later, the arrangement pattern of the introduction holes 22 and 23 in the distribution member 12 is also modified, so that the fibers A and B can be mixed in various patterns. .

  The first molten liquid distribution path 26A shown in FIG. 3A has two introduction holes 22 and one introduction hole 23 at a substantially central portion in the width direction of the boundary surface with the resin supply die 10 in the distribution member 12A. Are arranged in a straight line alternately in the longitudinal direction of the distribution member 12A, the melt receiving grooves 30a, 30b, and the melt receiving groove 30a branch in the width direction of the distribution member 12A, and two of them are aligned. The connecting groove 31a is connected to each inlet of the introduction hole 22 separately, and the connection groove 31b is branched from the melt receiving groove 30b in the width direction of the distribution member 12A and connected to the inlet of one introduction hole 23. The separation partition wall 32A separates the melt receiving grooves 30a and 30b and the connection grooves 31a and 31b from each other.

  The first molten liquid distribution path 26B shown in FIG. 3B has two introduction holes 22 and two introduction holes 23 at substantially the center in the width direction of the boundary surface between the distribution member 12B and the resin supply die 10. Are alternately arranged in a straight line in the longitudinal direction of the distribution member 12B, the melt receiving grooves 30a and 30b and the melt receiving grooves 30a and 30b branch in the width direction of the distribution member 12B. The connecting grooves 31a and 31b are individually connected to the inlets of the introduction holes 22 and 23 arranged side by side. The separation partition wall 32B separates the melt receiving grooves 30a and 30b and the connection grooves 31a and 31b from each other.

  The first molten liquid distribution path 26C shown in FIG. 3C has two introduction holes 22 and one introduction hole 23 at the substantially central portion in the width direction of the boundary surface between the distribution member 12A and the resin supply die 10. Are arranged in a straight line alternately in the longitudinal direction of the distribution member 12A, the melt receiving grooves 30a, 30b, and the melt receiving groove 30a branch in the width direction of the distribution member 12A, and two of them are aligned. The connecting groove 31 x is integrally connected to each inlet of the introduction hole 22, and the connection groove 31 b is branched from the melt receiving groove 30 b in the width direction of the distribution member 12 A and is connected to the inlet of one introduction hole 23. The separation partition wall 32C separates the melt receiving grooves 30a and 30b and the connection grooves 31x and 31b from each other.

  The first molten liquid distribution path 26D shown in FIG. 3D has two introduction holes 22 and two introduction holes 23 at a substantially central portion in the width direction of the boundary surface with the resin supply die 10 in the distribution member 12B. Are alternately arranged in a straight line in the longitudinal direction of the distribution member 12B, the melt receiving grooves 30a and 30b and the melt receiving grooves 30a and 30b branch in the width direction of the distribution member 12B. The connecting grooves 31x and 31y are integrally connected to the respective inlets of the introduction holes 22 and 23 arranged side by side. The separation partition wall 32D separates the melt receiving grooves 30a and 30b and the connection grooves 31x and 31y from each other.

  By configuring the first melt distribution passages 26, 26A to 26D using the separation partition walls 32, 32A to 32D having a simple structure, the low cost and high maintenance performance of the melt blown spinneret 1 can be achieved. Without damaging, the distribution patterns of the resin melts A and B can be increased, and a fiber product having various characteristics and appearance can be easily produced.

  In the present embodiment, the first melt distribution passages 26, 26A to 26D are provided on the boundary surface with the resin supply die 10 in the distribution members 12, 12A, 12B. You may provide in the supply hole exit side surface 10b which is a boundary surface with the distribution members 12, 12A, 12B in the die | dye 10. FIG. In the present embodiment, the first melt distribution passages 26 and 26A to 26D are configured by using the separation partition walls 32 and 32A to 32D. However, the present invention is not limited to this. The resin melts A and B can be distributed by providing a cavity which is a space having a predetermined dimension and adjusting the number and position of supply holes or introduction holes connected to the cavity.

  In the present embodiment, the resin melt A in the supply hole 20 is selectively introduced into the introduction hole 22, and the resin melt B in the supply hole 21 is selectively introduced into the introduction hole 23. However, the present invention is not limited to this, and a merging means that includes a separation partition and a cavity and joins a plurality of resin melts (resin melts A and B in this embodiment) is used. You can also.

  FIG. 4 is a top view schematically showing the configuration of another form of the distribution member 12 </ b> C provided with the combined flow path 33. In the distribution member 12C, a first molten liquid distribution path 26 and a merge channel 33 as a merge means are arranged in a longitudinal direction of the boundary surface on the boundary surface (introduction hole inlet side surface) with the resin supply die 10 in the distribution member 12C. Are alternately arranged at predetermined intervals. Further, in this embodiment, since the separation partition wall 32 has a function of the merging prevention means, the merging means and the merging prevention means are mixed on the boundary surface of the distribution member 12C.

  In the first melt distribution path 26, the inlets of the introduction holes 22 and 23 are alternately arranged substantially linearly in the longitudinal direction of the distribution member 12C at the substantially central portion in the width direction on the inlet side surface of the distribution member 12C. In the embodiment, the melt receiving grooves 30a and 30b that receive the supply of the resin melts A and B from the supply holes 20 and 21 and the melt receiving grooves 30a and 30b are branched and adjacent to the longitudinal direction of the distribution member 12C. The connecting grooves 31a and 31b are connected to the inlets of the pair of introduction holes 22 and 23. Thereby, the resin melts A and B are selectively distributed to some of the introduction holes 22 and 23, respectively. The combined flow path 33 is a flow in which both the connection grooves 31a and 31b are connected to the inlets 22 or the inlets of the introduction holes 23 arranged on both sides of the pair of introduction holes 22 and 23 adjacent to each other in the longitudinal direction of the distribution member 12C. Road. Accordingly, both of the resin melts A and B are supplied to some of the introduction holes 22 and 23.

  In the present embodiment, by providing the merging means 33, it is possible to spin side-by-side fibers made of the resin A and the resin B. In the present embodiment, the merging means 33 and the separation partition wall 32 functioning as a merging prevention means may be mixed. Accordingly, the resin melts A and B are selectively supplied to some of the introduction holes 22 and 23, respectively, and the resin melts A and B are supplied to the remaining introduction holes 22 and 23 together. it can. Therefore, the fiber A, the fiber B, and the side-by-side fiber can be mixed, and the amount, arrangement, and dispersion method of each fiber contained in the fiber product can be selected, so that the function of the obtained fiber product can be easily adjusted. .

  Such merging means or merging means and merging prevention means include a boundary surface with the distribution member 12 in the resin supply die 10, a boundary surface with the resin supply die 10 in the distribution member 12, and a distribution member 12 in the base body 11. It can be provided on at least one boundary surface selected from the boundary surface and the boundary surface of the distribution member 12 with the base body 11.

  FIG. 5A is a plan view schematically showing the appearance of the introduction hole outlet side surface 12 b which is a boundary surface with the base body 11 in the distribution member 12. FIG. 5B is a longitudinal sectional view of the melt blown spinneret device 1 schematically showing the connection between the introduction holes 22 and 23 of the distribution member 12 and the spinning holes 24 of the base body 11. As shown in FIG. 5A, in the introduction hole outlet side surface 12b of the distribution member 12, the outlets of the introduction holes 22 and 23 are spaced apart from each other at a predetermined interval in the center in the width direction by the longitudinal direction of the distribution member 12. Are alternately arranged in a substantially straight line.

  When the spinning hole inlet side surface 11c of the base body 11 is brought into close contact with the inlet hole outlet side surface 12b of the distribution member 12 as shown in FIG. 5B, the inlet hole 22 has one relatively large diameter. A spinning hole 24 is connected, and three introduction holes 24 having a relatively small diameter are connected to the introduction hole 23. The diameters of the spinning holes 24 are both smaller than the diameters of the introduction holes 22 and 23, but the portions of the introduction holes 22 and 23 that are not connected to the spinning holes 24 are the entrances to the spinning holes of the base body 11. Since it is blocked by the side surface 11c, the resin melts A and B do not leak from this portion.

  In the present embodiment, the diameter of one spinning hole 24 connected to the introduction hole 22 is configured to be larger than the diameter of the three spinning holes 24 connected to the introduction hole 23. You may comprise in a diameter. In this embodiment, one spinning hole 24 is connected to the introduction hole 22 and a plurality of spinning holes 24 are connected to the introduction hole 23. However, the present invention is not limited to this, and both the introduction holes 22 and 23 are connected. One or a plurality of spinning holes 24 may be connected to each other, a plurality of spinning holes 24 may be connected to the introduction hole 22, and one spinning hole 24 may be connected to the introduction hole 23.

  With this configuration, the resin melt A flowing through the introduction hole 22 is discharged from one spinning hole 24 to obtain a fiber A having a relatively large diameter made of the resin A, and flows through the introduction hole 23. The resin melt B is discharged from the three spinning holes 24, and fibers B having a relatively small diameter made of the resin B are obtained. That is, one fiber A and three fibers B are mixed in the longitudinal direction alternately. As a result, the resin melts A and B flowing through the introduction holes 22 and 23 can be distributed to the desired spinning holes 24 to be fiberized, so that the fibers A and B can be mixed in a desired pattern. Textiles can be made and fiber products having various properties can be easily obtained.

  FIG. 6A is a plan view schematically showing the appearance of the introduction hole outlet side surface 16b which is a boundary surface with the base body 11 in the distribution member 16 of another form. FIG. 6B is a longitudinal cross-sectional view of the melt blown spinneret device schematically showing another form of connection between the introduction holes 22, 23 of the distribution member 16 and the spinning hole 24 of the base body 11. As shown in FIG. 6 (a), on the introduction hole outlet side surface 16b of the distribution member 16, a cavity 35 (second melt) is connected to the introduction hole 22 and the outlet of the introduction hole 23 at the center in the width direction. The outlets of the liquid distribution path 27) are alternately arranged in a substantially straight line in the longitudinal direction of the distribution member 16 at a predetermined interval.

  The second molten liquid distribution path 27 is provided on the introduction hole outlet side surface 16 b that is a boundary surface with the base body 11 in the distribution member 16, and is connected to the introduction hole 23 to enlarge the outlet side hole diameter of the introduction hole 23. In addition, a cavity 35 that is a space to which the five spinning holes 24 are connected is provided. The cavity 35 is provided with a predetermined size so as not to merge with the introduction holes 22 adjacent to both sides in the longitudinal direction of the distribution member 16 of the introduction holes 23. The resin melt B that has flowed through the introduction hole 23 is temporarily stored in the cavity 35, and then is instantaneously introduced into the five spinning holes 24, and discharged and spun. Note that the portion of the cavity 35 that is not connected to the spinning hole 24 is blocked by the spinning hole inlet side surface 11c of the base body 11, so that the resin melt B does not leak from this portion.

  FIG. 7 is a longitudinal sectional view of the melt blown spinneret device schematically showing the configuration of the second melt distribution passage 28 of another embodiment. The second melt distribution path 28 shown in FIG. 7 is provided on the spinning hole inlet side surface 11 c of the base body 11, which is a boundary surface with the distribution member 12 in the base body 11, while one introduction hole 23 and On the other hand, a cavity 36 to which five spinning holes 24 are connected is provided. The cavity 36 is provided so as not to merge with the spinning hole 24 connected to the introduction hole 22 for introducing the resin melt A. The resin melt B that has flowed through the introduction hole 23 is temporarily stored in the cavity 36, and then is instantaneously introduced into the five spinning holes 24, and discharged and spun. Note that the portion of the cavity 36 that is not connected to the introduction hole 23 is closed by the introduction hole outlet side surface 12b of the distribution member 12, so that the resin melt B does not leak from this portion.

  By providing the second melt distribution paths 27 and 28 having such cavities 35 and 36, the same effects as those of the first melt distribution paths 26 and 26A to 26D can be obtained, and the cavities 35 and 36 can be obtained. Since the plurality of spinning holes 24 can be connected to each other, the resin melts A and B can be distributed to the predetermined spinning holes 24. Therefore, the mixed fiber pattern of the fiber A and the fiber B can be further increased.

  In the embodiment shown in FIGS. 6B and 7, the cavity 35 connected to the introduction hole 23 on the introduction hole outlet side surface 12 b, 16 b of the distribution member 12, 16 or the spinning hole inlet side surface 11 c of the base body 11. 36 are not limited to this, but a cavity connected to the introduction hole 22 may be provided. Furthermore, a cavity as a merging means may be provided so that some of the introduction holes 22 and 23 merge. In the present embodiment, the exit shapes of the cavities 35 and 36 are substantially elliptical or oval, but are not limited to this, and can be various shapes such as polygons and rhombuses. .

  The hot air injection slits 13 and 14 are two inclined surfaces extending symmetrically in an oblique direction gradually separated from the center line α of the melt blown spinneret device 1 from the tip portion 11d of the base body 11 toward the plate portion. The slit width adjusting plate 15 includes two slopes extending substantially parallel to the two slopes. The center line α is a virtual line that passes through the tip 11d of the base body 11 and is substantially perpendicular to the supply hole outlet side surface 10b of the resin supply die 10. Hot air generated from a hot air generator (not shown) is jetted at a predetermined angle with respect to the fibers discharged from the spinning hole 24 through the hot air supply grooves 13a, 14a and the hot air jet slits 13, 14. Is stretched to a predetermined degree of stretching. The drawn fibers are collected on a collecting means having a flat surface such as a drum or a conveyor in a mixed state, and become a fiber product.

The slit width adjusting plate 15 is supported by a driving means (not shown) so as to be close to and away from the base body 11 and adjusts the slit width of the hot air jet slits 13 and 14. The slit widths of the hot-air jet slits 13 and 14 are appropriately adjusted according to, for example, the types of resin melts A and B, physical property differences, and the like.
The melt blown spinneret device 1 is integrated by screwing the above-described members at predetermined positions.

  According to the melt blown spinneret device 1 of the present embodiment, the resin melt supplied from the plurality of supply holes to the plurality of introduction holes is distributed, and the resin melt introduced from the plurality of introduction holes to the plurality of spin holes. Sorting can be easily performed without stagnation or loss of the resin melt. In addition, it is easy to design the introduction hole so that the flow direction of the resin melt in the introduction hole substantially coincides with the discharge direction of the resin melt from the spinning hole, and it is almost the same as the fiber discharged from the spinning hole. Hot air can be injected without generating turbulent flow from a symmetric direction, so there is no need to generate fiber lumps, fiber diameter irregularities due to fusion between fibers, or air entrainment inside the fibers. In addition, stable fiber mixing can be realized, and various functions can be imparted, and high-performance fiber products such as nonwoven fabrics can be manufactured.

  FIG. 8 is a cross-sectional view in the width direction schematically showing the configuration of the main part of the spinneret device 2 for melt blown which is the second embodiment of the present invention. The melt blown spinneret device 2 is a modification of the meltblown spinneret device 1. In FIG. 8, the same reference numerals are assigned to the common parts of the melt blown spinneret devices 1 and 2 and the description thereof is omitted.

  The melt blown spinneret apparatus 2 includes a base 11A in which a base body 11 and a distribution member 12 are integrated, and the other configuration is common to the meltblown spinneret apparatus 1. A first melt distribution path 26 is provided on the boundary surface (introduction hole inlet side surface 11e) of the base 11A with the resin supply die 10, and the resin melt from the supply holes 20 and 21 to the introduction holes 22 and 23 is provided. A and B are distributed. Even in such a configuration, the introduction holes 22 and 23 (the introduction hole 23 is not shown) are formed inside the base 11A, so that the degree of freedom of the shape of the base 11A is increased and the manufacturing cost can be reduced. it can. Moreover, the same effect as the melt blown spinneret 1 can be obtained.

  FIG. 9 is a cross-sectional view in the width direction schematically showing the configuration of the main part of the spinneret device 3 for melt blown which is the third embodiment of the present invention. The melt blown spinneret device 3 is a modification of the meltblown spinneret device 1. In FIG. 9, the same reference numerals are assigned to the common parts of the melt blown spinneret devices 1 and 3, and the description thereof is omitted.

  The melt blown spinneret device 3 is characterized in that a first melt distribution path 29 is provided on a supply hole outlet side surface 10b which is a boundary surface with the distribution member 12 in the resin supply die 10, and the other features Is the same as that of the melt blown spinneret 1.

.
Similar to the first melt distribution path 26, the first melt distribution path 29 extends in the longitudinal direction of the resin supply die 10 on the supply hole outlet side surface 10 b of the resin supply die 10 and has a plurality of supply holes 20. , 21 are connected to the outlets of the resin melts A and B from the supply holes 20 and 21 and have a predetermined width and are supplied from the solution receiving grooves 37a and 37b. 10 is formed by connecting grooves 38a and 38b (the connecting groove 38b is not shown) that branches in the width direction 10 and is connected to the inlets of the introducing holes 22 and 23 (the introducing hole 23 is not shown). The melt receiving grooves 37a and 37b and the connecting grooves 38a and 38b are configured to be separated from each other by a separation partition wall (not shown) in order to prevent the resin melts A and B from joining. Since the melt receiving grooves 37a and 37b and the connecting grooves 38a and 38b are blocked by the introduction hole inlet side surface 12a of the distribution member 12 except for the portions connected to the inlets of the introduction holes 22 and 23, the melt receiving section The resin melts A and B do not leak from the grooves 37a and 37b and the connecting grooves 38a and 38b. Even if comprised in this way, the same effect as the melt-blown spinneret 1 can be obtained.

  FIG. 10 is a cross-sectional view in the width direction schematically showing the configuration of the main part of the spinneret 4 for meltblown that is the fourth embodiment of the present invention. The melt blown spinneret device 4 is a modification of the meltblown spinneret device 1. In FIG. 10, the same reference numerals are assigned to the common parts of the melt blown spinneret devices 1, 4 and the description thereof is omitted.

  The melt blown spinneret device 4 has a distribution member 17, and the other configuration is the same as the meltblown spinneret device 1. The distribution member 17 has a substantially T-shape when viewed in cross section, and excludes a peripheral portion having a predetermined width from both ends in the width direction of the introduction hole inlet side surface 17a that is a boundary surface with the resin supply die 10 in the distribution member 17. A melt receiving groove 40a, 40b having a predetermined width extending away from each other in the longitudinal direction of the distribution member 17 and a melt receiving groove 40a, 40b in the distribution member 17 are communicated with the melt blown spinneret. Connecting holes 41 a and 41 b (connecting holes 41 b are not shown) that extend obliquely so as to be close to the center line α of 4 and are separated from each other, one end to the connecting holes 41 a and 41 b and the other end to the plurality of spinning holes 24. Introducing holes 42 and 43 (introducing holes 43 are not shown) that communicate with each other and extend substantially parallel to the center line α are provided.

  In the apparatus 4, the connection holes 41 a and 41 b that connect the melt receiving grooves 40 a and 40 b and the introduction holes 42 and 43 are configured to extend in an oblique direction, but the introduction holes 42 and 43 are connected to the connection holes 41 a and 41 a. Since it is sufficiently longer than 41b, the flow direction of the resin melts A and B near the outlets of the introduction holes 42 and 43 is the direction in which the resin melts A and B are discharged from the spinning holes 24. In almost the same direction, the resin melts A and B flow stably. Accordingly, the fibers A and B made of the resin melts A and B discharged from the spinning hole 24 are injected with hot air at a predetermined angle from the hot air injection slits 13 and 14 and are stretched to a predetermined degree of stretching.

  In the present embodiment, the melt receiving grooves 40 a and 40 b are provided on the inlet hole inlet side surface 17 a of the distribution member 17, and the melt receiving grooves 40 a and 40 b and the connection holes 41 a and 41 b are provided inside the distribution member 17. Since it is connected and the selective supply of the resin melts A and B from the supply holes 20 and 21 to the introduction holes 42 and 43 can be performed stably and easily, the fiber A and Mixing with the fiber B in a predetermined pattern can be performed stably and efficiently. Furthermore, the same effect as the melt blown spinneret 1 can be obtained.

  FIG. 11 is a cross-sectional view in the width direction schematically showing a configuration of a main part of a melt blown spinneret device 5 according to the fifth embodiment of the present invention. The melt blown spinneret device 5 is a modification of the meltblown spinneret device 4. In FIG. 11, the same reference numerals are assigned to the common parts of the melt blown spinneret devices 4 and 5, and the description thereof is omitted.

  The melt blown spinneret device 5 has a distribution member 18, and the other configuration is the same as the meltblown spinneret device 4. The distribution member 18 has a substantially T-shape when viewed in cross section, and the introduction hole inlet side surface 18a, which is a boundary surface between the distribution member 18 and the resin supply die 10, has a peripheral portion with a predetermined width from both ends in the width direction. Except for the melt member receiving grooves 44a and 44b having a predetermined width and extending in parallel with each other in the longitudinal direction of the distribution member 18, and the melt member receiving grooves 44a and 44b inside the distribution member 18 respectively. The connection holes 45a and 45b extending in an oblique direction so as to be close to the center line α of the spinneret device 5 are connected to the connection holes 45a and 45b at one end and the plurality of spinning holes 24 at the other end and spaced apart from each other. And introduction holes 46 and 47 extending substantially parallel to the line α.

  Further, the distribution member 18 is characterized in that the introduction holes 46 and 47 are connected in the vicinity of these outlets, and the resin melts A and B are simultaneously introduced into the spinning holes 24. Thereby, side-by-side type fibers can be mixed. In this embodiment, a merging means for directly connecting the introduction holes 46 and 47 is used.

  In the present embodiment, the side-by-side fiber, the fiber A, and the fiber B are mixed by providing a merging prevention means that directly connects the spinning holes 24 without directly connecting some of the introduction holes 46, 47. It becomes possible to do. Thereby, the characteristics of the obtained fiber product can be easily changed, and a fiber product having desired characteristics can be obtained easily and efficiently.

  The embodiment of the present invention has been described above, but the present invention is not limited to such an example. For example, each of the supply holes for receiving the supply of three or more different resin melts is provided in the resin supply die. Deviation from the gist of the present invention, such as configuring a melt blown spinneret device to obtain a fiber product in which three or more kinds of fibers are mixed at a time by providing a plurality of introduction holes and increasing the number of introduction holes correspondingly. Needless to say, the present invention can be implemented in various forms within a range not to be performed.

1, 2, 3, 4, 5 Spinneret device for melt blown 10 Resin supply die 11 Base body 11A Base 12, 12A, 12B, 12C, 16, 17, 18 Distribution member 13, 14 Hot air injection slit 15 Slit width adjusting plate 20 , 21 Supply hole 22, 23, 42, 43, 46, 47 Introduction hole 24 Spinning hole 25 Recess 26, 26A-26D, 29 First melt distribution path 27, 28 Second melt distribution path 30a, 30b, 37a, 37b, 40a, 40b, 44a, 44b Melt receiving groove 31a, 31b, 31x, 31y, 38a, 38b Connecting groove 32, 32A, 32B, 32C, 32D Separation partition 33 Combined flow path 35, 36 Cavity 41a, 41b, 45a, 45b Connecting hole

Claims (8)

A spinneret device for melt blown for producing a fiber product by mixing a plurality of fibers made of a plurality of resins having different or the same kind and different physical properties,
A resin supply die having a plurality of supply holes to which the plurality of resin melts are supplied;
A plurality of introduction holes that communicate with the supply holes and that are spaced apart from each other and extend substantially in parallel; and a base that has a plurality of spinning holes that communicate with the introduction holes and that discharge and spin a melt of the plurality of resins; A spinneret for a meltblown, comprising:   The melt blown spinning according to claim 1, wherein the base includes a base body having the plurality of spinning holes and recesses, and a distribution member having the plurality of introduction holes and detachably accommodated in the recesses. Base device.   A molten liquid of the plurality of resins supplied from the supply holes provided on at least one boundary surface of the resin supply die with the base and the boundary surface of the base with the resin supply die is predetermined. The spinneret for a meltblown according to claim 1 or 2, further comprising a first melt distribution passage for distributing the first introduction liquid to the introduction hole.   A plurality of resin melts introduced from the introduction holes provided on at least one of a boundary surface of the distribution member with the base body and a boundary surface of the base body with the distribution member; The spinneret for a melt blown according to claim 2, further comprising a second melt distribution path that distributes to the spinning holes.   2. The apparatus according to claim 1, further comprising a joining unit that is provided on at least one of a boundary surface of the resin supply die with the die and a boundary surface of the die with the resin supply die to join the plurality of resin melts. Spinneret device for melt blown.   A boundary surface with the distribution member in the resin supply die, a boundary surface with the resin supply die in the distribution member, a boundary surface with the base body in the distribution member, and a boundary surface with the distribution member in the base body 3. The melt blown spinneret device according to claim 2, further comprising a joining unit that is provided on at least one of the boundary surfaces and joins the melts of the plurality of resins.   7. The melt blown according to claim 5, further comprising a merging prevention unit that prevents merging of the melts of the plurality of resins, the merging unit being provided on the boundary surface where the merging unit is provided. Spinneret device.   A first melt distribution path for distributing the plurality of resin melts supplied from the supply holes to the predetermined introduction holes, provided on the boundary surface other than the boundary surface provided with the merging means; The melt blown spinneret device according to any one of claims 5 to 7, further comprising a second melt distribution path for distributing the melt of the plurality of resins introduced from the introduction holes to the predetermined spinning holes. .

Images