JP3970189B2 - Melt spinning equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, one or more types of thermoplastic polymer (hereinafter simply referred to as “polymer”) are supplied to a melt spinning facility for spinning one type of polymer, and two or more types are supplied. The present invention relates to a melt-spinning apparatus that can be used for multipurpose applications in which the above polymers can be spun.
[0002]
[Prior art]
To date, when melt spinning a polymer such as polyester, polyamide, and polyolefin, a dedicated melt spinning apparatus for spinning only one kind of polymer has been widely used. In such a dedicated spinning device, since a single type of polymer is the application target, the polymer is uniformly heated without giving an unfavorable thermal history of heating at a high temperature for a long time. A heating device specialized for heating conditions for a single type of polymer is used.
[0003]
FIG. 2 illustrates an embodiment of the four spindles of the single-polymer melt spinning apparatus as described above. Here, in FIG. 2, FIG. (A) is an external view (perspective view) of the melt spinning apparatus (spin block), and FIG. (B) is a main part of the spin block cut in the short direction. It is sectional drawing. Each reference numeral will be described. 1 'is a spin block body, 2' is a metering device such as a gear pump, 3 'is a polymer distribution member, 5' is a polymer distribution pipe, and 7 'is a pack dome. . At that time, polymer flow paths 31 ′ and 32 ′ are formed in the polymer distribution member 3 ′. A detailed description of the pack dome 7 'is omitted, but a known spinneret pack (not shown) can be freely attached. The polymer introduced into the spinneret pack is discharged from the spinneret. Needless to say, it is melt-spun. That is, a single type polymer for melt spinning is received in the distribution piping system 5 ′, distributed to each metering supply device 2 ′ provided downstream thereof, and continuously metered by each metering supply device 2 ′. However, it is supplied to a multi-spindle (four spindles in the figure) spinneret pack (not shown) attached in the pack dome 7 ′, and fiberized.
[0004]
In the conventional melt spinning apparatus configured as described above, a single kind of polymer is branched and supplied downstream from the direction of the arrow to the polymer distribution piping system 5 ′ along the path indicated by the one-dot chain line. However, such a polymer distribution piping system 5 ′ normally places the polymer flowing in the piping under an appropriate flow state and distributes it to each metering supply device 2 ′ without causing thermal degradation of the polymer. For this purpose, it is provided in the spin block body 1 ′. The distribution piping system 5 ′ is heated to a temperature suitable for the polymer used for melt spinning by a heating means provided in the spin block main body 1 ′ such as a heat medium type heating device. Specialized in heating polymers. Therefore, no consideration is given to heating the plurality of types of polymers to suitable temperatures.
[0005]
However, from the viewpoint of high added value and differentiation of the fiber, for example, by laminating two different types of polymers side by side, the resulting fiber is given a latent crimp or a sea-island type composite. Conjugate spinning (composite spinning) has been performed in which sea components are removed from fibers to obtain ultrafine fibers. Furthermore, in recent years, a plurality of spinneret packs, each specialized for melt spinning of one type of polymer, are used, but fibers derived from two or more different polymers spun from each spinneret are spun. The so-called “spinning fiber blending” technique, in which fiber blending is performed later, has been actively performed.
[0006]
However, such a melt spinning apparatus is suitable for each application from the beginning, as proposed in Japanese Utility Model Publication No. 2-26943, Japanese Patent Application Laid-Open No. 1-272807, Japanese Patent Application Laid-Open No. 1-272808, or the like. It is usually designed as a dedicated device.
[0007]
However, when such a melt spinning apparatus suitable for a specific application is used, as in recent years, as an apparatus for manufacturing a small quantity and a variety of production modes for the purpose of high added value or differentiation, Because it was not designed from the beginning for multi-purpose use, it cannot be handled at all. In addition, if a dedicated melt spinning apparatus is manufactured in accordance with each of the diversified embodiments, a problem of increasing the yarn production cost is caused. Furthermore, even if an attempt is made to change the embodiment suddenly in response to various demands such as changing the brand name of the fiber to be produced, composite fiber formation, cospanning, etc., it is not possible to respond immediately because it takes days to manufacture the device. It has a very big problem.
[0008]
Therefore, there is a need for an apparatus capable of performing multi-purpose melt spinning with a single melt spinning apparatus. However, as such a multi-purpose melt spinning apparatus, JP-A-61-296110, or This is proposed in Japanese Patent Laid-Open No. 62-78206. However, this conventional melt spinning apparatus was originally designed as a multi-purpose melt spinning apparatus, and when such a melt spinning apparatus is newly manufactured, it requires a corresponding production cost and days. There is no change.
[0009]
[Patent Document 1]
JP-A-1-272808 gazette
[Patent Document 2]
Japanese Patent Laid-Open No. 1-272807
[Patent Document 3]
Japanese Patent Laid-Open No. 62-78206
[Patent Document 4]
Japanese Patent Laid-Open No. 61-296110 [0013]
[Patent Document 5]
Japanese Utility Model Publication No. 2-26943 [0014]
[Problems to be solved by the invention]
In view of the above-described problems of the prior art, the present invention provides a dedicated melt spinning apparatus for melt spinning only a single conventional polymer for compound spinning using two or more types of polymers, or for cospun spinning. It aims at providing as a melt spinning apparatus of this.
[0015]
[Means for Solving the Problems]
Here, as a melt spinning apparatus for achieving the above object, as the present invention according to claim 1, a spinneret pack for spinning a “ single type polymer (hereinafter referred to as“ A polymer ”) as a thermoplastic synthetic fiber” is provided. A spin block body in which a pack dome for mounting the spinneret pack is formed and heating means for heating the spinneret pack is provided, and an A polymer for continuously metering the A polymer into the spinneret pack Metering device, A polymer piping system built in the spin block body for transporting the A polymer to the A polymer metering device, and the spinneret pack from the A polymer metering device A melt spinning apparatus for a single polymer, comprising at least a polymer distribution member for distributing and supplying the A polymer to
A B polymer metering device for continuously metering a different type of polymer from the A polymer (hereinafter referred to as “B polymer”) is attached to the spin block main body, and the B polymer metering device B A B polymer piping system for transporting the polymer is provided in the spin block main body without being separated and independently provided, and the polymer distribution member is supplied from each of the metering devices, respectively, the A polymer and the B polymer. Are separated and supplied to the spinneret pack on the downstream side, and the spinneret pack is a spinneret pack for receiving a plurality of types of polymers and spinning them into a fiber shape. melt spinning apparatus "is provided, characterized in that changing the melt spinning apparatus for melt spinning apparatus more polymers
[0016]
At this time, as in the present invention as set forth in claim 2, it is "melt-spinning apparatus of claim 1 further comprising a pipe path for supplying the respective polymer to the metering device by the tournament branch of the pipeline" Is desirable. Further, at this time, as in the present invention described in claim 3, it is desirable to use the “melt spinning apparatus according to claim 1 or 2 which is a conjugate spinning apparatus or a cospun spinning apparatus”.
[0017]
And like this invention of Claim 4, "The heating and / or heat retention means were independently provided with respect to each of the said piping system provided in the outer side of the said spin block. More preferably, the melt spinning apparatus according to any one of the above is used.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, melt spinning is performed using one or more (especially a plurality of) polymers such as polyester, polyamide, polyolefin, and polyethylene naphthalate to obtain a synthetic fiber yarn composed of one or more of these polymers. The present invention relates to a melt spinning apparatus.
[0019]
The present inventor supplies two or more types of polymers by supplying one or more types of polymers even in the case of a dedicated melt spinning apparatus for supplying and spinning a single type of polymer as shown in FIG. The idea was that it would be possible to realize a melt-spinning apparatus that spins the yarn. In other words, even if it is a spin block for a single type of polymer, conjugate yarn and cospun yarn can be manufactured by installing a polymer conduit and an extruder directly above it, and adding gear pumps to supply a fixed amount to the pack dome. It has been found that this is possible, and the present invention has been made based on this finding.
[0020]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
FIG. 1 is an explanatory view schematically illustrating an embodiment of a four-spindle melt spinning apparatus that can be suitably used in the present invention, in which conjugate fibers (complex fibers) are obtained from two types of polymers. Is for. 1 (a) is an external view (perspective view) of the melt spinning apparatus (spin block), and FIG. 1 (b) shows the spin block in the short direction of FIG. 1 (a). It is the principal part sectional drawing cut | disconnected. The components constituting the melt spinning apparatus illustrated in FIG. 1 will be described first. 1 is a spin block body, 2a is a metering supply device (for A polymer), 2b is a metering supply device (for B polymer), 3 is a first polymer distribution member, 4 is a second polymer distribution member, 5 is a polymer pipe, 6 is a polymer pipe, and 7 is a pack dome. At that time, the B polymer piping system 6 is usually configured to include a receiving piping 61, a branch piping 62, a supply piping 63, and the like.
[0022]
In the melt spinning apparatus exemplified above, the melted polymers A and B are separated into an A polymer piping system 5 and a B polymer piping system 6 provided in the spin block body 1 by two extruders not shown in FIG. Each is supplied in a melted state. These A polymer and B polymer may be supplied to the extruder (not shown) as chip-like pellets to be melted here, or the molten polymer after polymerization is removed from the polymer discharge line. You may make it supply by making it branch. In addition, when using the said extruder, if a pellet is melt | dissolved completely and will be supplied to the spin block main body 1 in a molten state, it will be limited especially to a screw shape, a single screw or a twin screw extruder, etc. Absent. However, in order to make the molten state of the pellets uniform, it is desirable to feedback-control the screw speed of the extruder so that the discharge pressure of the extruder is constant.
[0023]
As described above, the A polymer and the B polymer are supplied to the spin block body 1 from the above-described extruder (not shown). Will be described in detail below.
[0024]
First, the A polymer is transported through the piping system 5 through the same route (the route indicated by the one-dot chain line in FIG. 2) in the spin block body 1 as described in the section “Prior Art”. That is, it flows into the polymer flow path 31a provided in the first polymer distribution member 3 from the aforementioned extruder (not shown), and then downstream from the polymer flow path 41a provided in the second polymer distribution member 4. It distributes to each metering supply device 2a. At that time, it is preferable that the polymer piping system 6 for transporting the A polymer to each metering supply device 2a has a tournament branch as shown by a one-dot chain line in FIG. 2 in order to make the polymer residence time the same condition. . In addition, it goes without saying that the polymer piping system 5 at this time is heated by the same method and means as a dedicated melt spinning machine for spinning only a single kind of polymer. This is because the piping system for transporting the A polymer to each metering supply device 2a does not require any changes.
[0025]
After that, the A polymer transported to each metering device 2a in this way flows downstream while being continuously metered by each metering device 2a, and is provided on the second polymer distribution member 4. Supplied to the polymer flow path 42a and flows to the polymer flow path 32a provided in the first polymer distribution member 3. In this way, finally, it is supplied to the A polymer introduction hole of the composite spinning base pack (not shown) attached to the pack dome 7. The details of the above-mentioned composite spinning base pack are described in the patent documents cited in the “Prior Art” column, and the detailed description thereof will be omitted.
[0026]
This is the end of the description of the transport of the A polymer, and then the transport of the B polymer will be described.
[0027]
For the transportation of the B polymer, first, the receiving pipe 61, the branch pipe 62, the supply pipe 63, and the like constituting the pipe system 6 flow from the aforementioned extruder (not shown) to the downstream side while being tournament branched, Distribution is performed from the polymer flow path 42b provided in the second polymer distribution member 4 to each metering supply device 2b. Here, the important thing is that, as shown in FIG. 1, in the piping system for transporting the B polymer to each metering supply device 2b, unlike the piping system of the A polymer, outside the spin block body 1, A heating and / or heat retaining means (not shown) is provided independently of the heating means of the spin block main body 1. Therefore, the B polymer can be heated and / or kept warm independently of the A polymer, and the heating means for the A polymer and the heating and / or keeping means for the B polymer (not shown) are provided independently of each other. So that they do not interfere with each other thermally.
[0028]
In addition, as such a B polymer heating and / or heat retaining means (not shown), for example, the piping system 6 whose outer surface is kept warm by a heat insulating material is used as a double pipe, and the polymer is allowed to flow through the inner pipe. A heat medium heating method in which a heat medium flows through the outer pipe, an electric heating method in which an electric heater or a heat insulating material is provided so as to surround the outer side of the pipe system 6, and the like can be adopted. Further, a cooling means may be provided in the supply pipe 63 so that the supply of the polymer can be stopped so that the measurement supply device 2b can be replaced, for example, when the measurement supply device 2b breaks down during production. . That is, the supply pipe 63 can be used as a freezing valve by cooling the supply pipe 63 and solidifying the molten polymer flowing in the pipe.
[0029]
As described above, when the B polymer is distributed to each metering device 2b, the second polymer distributing member 4 on the downstream side is then continuously metered by these metering devices 2b. Are respectively supplied to the polymer flow path 42b provided in the first polymer distribution member 3 and then flow to the polymer flow path 32b provided in the first polymer distribution member 3. In this way, finally, the above-mentioned A polymer is supplied independently to the B polymer introduction hole of the composite spinning base pack (not shown) attached to the pack dome 7 in a completely separated state. Will be.
[0030]
As described above, the A polymer and the B polymer supplied to a known composite spinning base pack are made into conjugate fibers bonded side by side or so-called sea-island type conjugate fibers. Is well known. Although detailed description thereof is omitted, it is easy to understand that a melt spinning apparatus using three or more kinds of polymers can be obtained by further adding an extruder, a piping system, a heating device, and a metering supply device. It will be possible. Although the conjugate fiber has been described here, the spinneret pack is used as a multi-split split base pack (for example, a double-split split base pack), and the A polymer and the B polymer are separated from each split split base pack. It goes without saying that it can also be used when spinning cospun yarns such as spinning separately and then blending them after spinning.
[0031]
By the way, in this invention, regarding the material of each member used for the piping system etc. for transporting each of the polymers such as the A polymer and the B polymer independently from each other, it is resistant to corrosion and has a flow resistance. It has a small inner wall, there is no place where the polymer stays abnormally, it is designed with consideration of pressure resistance, thermal stress due to thermal expansion, and pressure loss, and the polymer is heated at a temperature that does not deteriorate. It goes without saying that it is preferable. In addition, the heating means of such a piping system is not particularly limited as long as there is no temperature variation and can be set to a desired temperature. For example, a cast heater or a heating medium heating device is preferably used. Can do.
[0032]
The metering devices 2a and 2b such as a gear pump used in the present invention are not particularly limited as long as they can meter and supply various polymers to the downstream side while continuously metering. Further, in the present invention, the polymer distribution members 3 and 4 in the embodiment shown in FIG. 1 are connected to the second polymer distribution member 4 and the metering devices 2a and 2b in order to install the metering devices 2a and 2b. The first polymer distribution member 3 is attached to the first polymer distribution member 3. However, if each metering supply device 2a and 2b can be installed and various polymers can be independently supplied to the pack dome 7 separately, the structure is limited to such a structure. It goes without saying that the design can be changed as needed. These polymer distribution members 3 and 4 are polymers that flow through the piping system 6 by being heated and / or kept warm by attaching a heating means such as a casting heater or a heat retaining means such as a heat insulating material. On the other hand, it is preferable because temperature spots hardly occur.
[0033]
【The invention's effect】
As described above, in the present invention, the spin block main body 1 also uses an exclusive spin block for spinning a single kind of polymer, and an extruder, a polymer pipe, and a metering device are used as necessary. By additionally installing, conjugate yarn and cospun yarn using two or more types of polymers can be spun. For this reason, the melt spinning apparatus can be used for various purposes, and when performing high added value or differentiation, a wide range and flexibility can be met according to the demand. In addition, by diverting and using existing dedicated melt spinning equipment specialized for melt spinning of single-species polymers, it is possible to keep equipment costs low, and a dedicated melt-spinning equipment for melt spinning single-species polymers. Even if surplus occurs, this conversion is possible. Further, if the supply on the B polymer side is stopped, it can be used as a dedicated melt spinning facility for a single polymer.
[Brief description of the drawings]
FIG. 1 is an explanatory view schematically illustrating an embodiment of a four-spindle melt spinning apparatus that can be suitably used in the present invention.
FIG. 2 is an explanatory view schematically illustrating an embodiment of four spindles of a conventional melt spinning apparatus for melt spinning a single type polymer.
[Explanation of symbols]
1: Spin block body 2a: Metering device (for polymer A)
2b: Metering device (for B polymer)
3: 1st polymer distribution member 4: 2nd polymer distribution member 5: (A) Polymer piping system 6: (B) Polymer piping system 7: Pack dome 61: Receiving piping (B polymer)
62: Branch piping (B polymer)
63: Supply piping (B polymer)

Claims (4)

A spinneret pack for spinning a single type polymer (hereinafter referred to as “A polymer”) as a thermoplastic synthetic fiber, and a heating means for heating the spinneret pack by forming a pack dome for mounting the spinneret pack is provided. Spin block body, A polymer metering device for continuously metering the A polymer to the spinneret pack, and the spin block body for transporting the A polymer to the A polymer metering device In the melt spinning apparatus for single-type polymer, comprising at least a piping system for the A polymer built in and a polymer distribution member that distributes and supplies the A polymer from the metering and supplying apparatus for the A polymer to the spinneret pack,
A B polymer metering device for continuously metering a different type of polymer from the A polymer (hereinafter referred to as “B polymer”) is attached to the spin block main body, and the B polymer metering device B A B polymer piping system for transporting the polymer is provided in the spin block main body without being separated and independently provided, and the polymer distribution member is supplied from each of the metering devices, respectively, the A polymer and the B polymer. Are separated and supplied to the spinneret pack on the downstream side, and the spinneret pack is a spinneret pack for receiving a plurality of types of polymers and spinning them into a fiber shape. A melt spinning apparatus, wherein the melt spinning apparatus is changed to a melt spinning apparatus for a plurality of types of polymers . Melt spinning apparatus according to claim 1, further comprising a pipe path for supplying the respective polymer to the metering device by the tournament branch of the piping system.   The melt spinning apparatus according to claim 1 or 2, which is a conjugate spinning apparatus or a cospun spinning apparatus.   The melt spinning apparatus according to any one of claims 1 to 3, wherein heating and / or heat retaining means are independently provided for each of the piping systems provided outside the spin block.

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