JP5123616B2 - Spinneret pack shared by general-purpose melt spinning equipment - Google Patents

Description

  The present invention provides a general-purpose melt spinning device for melt spinning of multi-named yarns such as fiber brands of a single kind of polymer, composite fiber brands of a plurality of kinds of polymers, and spun blended brands without using a dedicated melt spinning apparatus. The present invention relates to a spinneret pack that can be shared and spun.

  Until now, when a polymer such as polyester, polyamide, and polyolefin is melt-spun, a melt-spinning apparatus for exclusively melt-spinning only one kind of polymer has been widely used.

  However, as the needs for high added value and differentiation of fibers increase, for example, by laminating two different types of polymers side-by-side, the resulting fibers can be latently crimped, or sea-island type composite fibers can be Conjugate spinning (composite spinning) has been performed in which components are removed to obtain ultrafine fibers.

  Furthermore, each uses a combination of a plurality of spinneret packs specialized for melt spinning of one type of polymer, and a single fiber group derived from each of a plurality of different polymers is spun after spinning from each die. The so-called “spinning blending” technique, in which these are mixed to obtain a single multifilament yarn, has been actively performed. Such a melt spinning apparatus is usually designed as a dedicated apparatus suitable for each application from the beginning as proposed in Patent Document 1 or Patent Document 2.

  However, in recent years, when it is strongly desired to produce multi-brand small quantities for the purpose of high added value and differentiation of textile products, only single kind polymer is used rather than installing a dedicated melt spinning apparatus. Equipment that can handle melt spinning such as single fiber made of multi-component, composite fiber made of multiple types of polymers, spun and blended fiber is desired, and there is also a demand for space saving to install equipment large.

  Therefore, in Patent Document 3, etc., a melt spinning facility for supplying one or more types (especially, a plurality of different types) of polymers to spin composite fibers (conjugate fibers), spun-mixed cospun yarns, etc. is inexpensive. Proposed methods have been proposed. However, the technique proposed in the above-mentioned Patent Document 3 intends to cope with the problem by devising the route to the spinneret pack attached to the melt spinning apparatus. For this reason, there is a problem in that it is necessary to significantly modify the existing equipment and to save space in the melt spinning equipment corresponding to this problem.

JP-A-1-272807 JP-A-1-272808 Japanese Patent Laid-Open No. 2004-232107

  In view of the problems of the prior art described above, the object of the present invention is to provide a single polymer brand, a composite fiber brand composed of a plurality of polymers, and a thread composed of a single polymer, but each thread is different from each other. An object of the present invention is to provide a spinneret pack that can be shared with a general-purpose melt spinning apparatus that can be used for multipurpose applications such as fiber brands in which yarns of various types of polymers are mixed and mixed at the time of spinning.

  Here, according to the present invention for solving the above-mentioned problems, “the same general-purpose melt spinning apparatus can be mounted individually and in common and introduced independently from the melt spinning apparatus side” A spinneret pack for composite fibers and a spinneret pack for single fibers, each of which spins a composite fiber and a single fiber from two or more different polymers and two or more polymers of the same or different types, The composite fiber spinneret pack is equipped with a composite fiber spinner that spins a composite flow in which different polymer groups independently introduced from the melt spinning apparatus are joined in the spinneret pack, and the other In the spinneret pack for single fibers, the different kinds or the same kinds of polymers introduced independently from the melt spinning apparatus are separated from each other without being merged as each single kind polymer. Wherein the single fiber die is attached to spun accept Re respectively spinneret packs shared universal melt spinning apparatus "is provided.

  The spinneret pack according to the present invention is used for melt spinning a single fiber brand consisting of a single polymer, a composite fiber brand consisting of a plurality of polymers, and a brand of spun mixed fiber consisting of a plurality of polymers. In addition, in the prior art, each was handled by using a dedicated melt spinning apparatus. However, in the present invention, only a common general-purpose melt spinning apparatus can be used, and this common general-purpose melt spinning apparatus can be used. Therefore, the above-mentioned multi-brand fiber can be melt-spun.

The embodiment of the present invention described above will be described in detail below with reference to the drawings.
FIG. 1 is a diagram illustrating an embodiment of a spinneret pack according to the present invention. FIG. 1 (a) shows a schematic plan view, and FIG. 1 (b) shows an XX in FIG. 1 (a). FIG. The spinneret pack illustrated in FIG. 1 receives a plurality of types of polymers (the example of FIG. 1 shows the case of “two types of polymers”) in one base, and the core-sheath type composite single fiber group, A multifilament yarn composed of a sea-island type composite single fiber group, a side-by-side type single composite fiber group, or a deformed composite single fiber group in which these are combined. Can be suitably used for melt spinning.

  FIG. 2 is a view illustrating another embodiment of the spinneret pack of the present invention, in which FIG. 2 (a) shows a schematic plan view, and FIG. 2 (b) shows in FIG. 2 (a). It is YY 'arrow sectional drawing. The spinneret pack illustrated in FIG. 2 is melt-spun with multi-filament yarns each composed of a group of filaments made of a single type of polymer (the example of FIG. 2 shows the case of “6 spindles”). Therefore, it can be used suitably. At that time, it is of course possible to perform so-called “spun blending” in which adjacent weights are spun as yarns composed of different types of polymers, and these yarns are spun and spun after spinning.

  Here, the main feature of the present invention is that a dedicated melt spinning apparatus (spin block) specialized for various uses such as for composite fibers, single fibers, or spun mixed fibers is installed. The purpose is to realize a general-purpose melt spinning apparatus that can be used for these applications while sharing only one melt spinning apparatus. As described above, the melt spinning apparatus to which the present invention is applied is the most advantageous in that both the spinneret pack of FIG. 1 and the spinneret pack of FIG. 2 can be shared as a common melt spinning apparatus. It is a feature. This feature will be described in more detail with reference to FIGS.

  In FIG. 1 and FIG. 2, each reference numeral will be described first. Reference numerals A and B represent two kinds of polymers used for melt spinning, respectively. 1 and FIG. 2, the spinneret packs of FIG. 1 and FIG. 2 are not the same spinneret pack, but are different from each other. In the spinneret pack, pack parts having the same operational effect or function are denoted by the same reference numerals.

  Here, the type of polymer is not particularly limited as long as the gist of the present invention is satisfied. For example, polyethylene terephthalate and a copolymer thereof, polyethylene naphthalate, polybutylene terephthalate, polytrimethylene terephthalate, Examples of the polymer that can be melt-molded include polypropylene, polyolefin, polycarbonate, polyacrylate, polyamide, and polylactic acid. In that case, various additives such as inorganic materials such as titanium oxide, silica and barium oxide, colorants such as carbon black, dyes and pigments, flame retardants, fluorescent whitening agents, antistatic agents, and ultraviolet absorbers are contained in the above substances. May be included.

  Next, reference numerals 1 to 3 denote an upper pack body, an intermediate pack body, and a lower pack body, respectively. Although not shown, these pack bodies 1, 2 and 3 are screw holes (not shown) in which fastening bolts (not shown) are screwed into the intermediate pack body 2 in the same manner as known spinneret packs. 2), the upper pack body 1 and the lower pack body 3 are fastened and assembled together, respectively.

  Reference numerals 4 and 5 are the introduction flow paths through which the polymers A and B are introduced into the upper pack body 1, reference numerals 6 and 7 are the filtration units for filtering the polymer A and the polymer B, respectively, and reference numeral 8 Reference numerals 10 and 9 denote the respective introduction holes into the bases of the polymers A and B, and reference numeral 10 denotes the base.

  Although the structures of the filtration units 6 and 7 are omitted in the drawing, for example, a well-equipped filter with a rim formed by depositing an upper filtration layer made of metal sand or glass beads is provided on the polymer distribution member. Needless to say, it has the following structure. In addition, with respect to the caps 10, each of the caps 10 is provided with a large number of polymer discharge hole groups (spinning hole groups), which makes it possible to spin multifilament yarns. However, in the base 10 illustrated in FIGS. 1 and 2, the one illustrated in FIG. 1 is for a composite fiber composed of a plurality of types of polymers, and the one illustrated in FIG. 2 is for a single fiber composed of a single polymer. It is.

  Here, in the spinneret pack illustrated in FIGS. 1 and 2, the upper pack body 1 can be used in common with a melt spinning apparatus (spin block) to which these spinneret packs are attached. It has the introduction flow paths 4 and 5 in which the receiving position or the number of each of the molten polymers flowing in are common specifications. Accordingly, in the spinneret pack having the two embodiments illustrated in FIGS. 1 and 2, the polymer supplied from the melt spinning apparatus (spin block) can be used without any problem regardless of which spinneret pack is used. Can be accepted in the pack.

  Next, as described above, the introduction flow paths 4 and 5 provided in these upper pack bodies 1 receive the different polymers A and B from the melt spinning apparatus (spin block), respectively. And B are guided to the filtration units 6 and 7, respectively. The filtration parts 6 and 7 are formed between the upper pack body 1 and the intermediate pack body 2 as shown in the figure, and their roles are to filter foreign substances contained in the polymers A and B, respectively. Is to do. Therefore, it is not necessary to change these filter parts 6 and 7 also in the embodiment of the two spinneret packs illustrated in FIGS. 1 and 2. Therefore, the filtration units 6 and 7 have a common structure in the two embodiment examples.

  However, regarding the structure of the spinneret pack after the polymers A and B are filtered, the spinneret pack of FIG. 1 has a structure in which the polymers A and B are introduced into one common base 10. When two different types of polymers can be supplied to the common base 10 in this way, a core-sheath type, a sea-island type, or a side-by-side type is formed by forming a composite flow composed of these polymers A and B. These composite fibers can be melt-spun.

  In addition, regarding the structure of the base 10 illustrated in FIG. 1, various composite fibers can be obtained by combining a plurality of base plates to form a composite flow according to each application, as is well known. Moreover, although this is not pointed out every time, it has already been described in many technical literatures. Accordingly, the detailed design is a matter that can be appropriately selected and designed by those skilled in the art, and therefore, detailed description thereof is omitted here.

  Next, the spinneret pack illustrated in FIG. 2 has a structure in which the above-described polymers A and B individually flow independently into the corresponding caps 10 respectively. Therefore, in the case of this spinneret pack, since each single-type polymer flows into each corresponding base 10, the base for spinning the single-type polymer is the target. Therefore, unlike a spinneret that melt-spins a composite flow composed of a combination of a plurality of types of polymers, such as a composite fiber, a spinneret for melt-spinning of a solid or hollow round section yarn composed of a normal single-type polymer, Alternatively, the spinneret pack is provided with a melt-spinning die having a modified cross-section yarn.

  In the spinneret pack illustrated in FIG. 2, the polymer flowing into each of the caps 10 may be the polymer A, the polymer B, or both. What is important is that in the spinneret pack for composite fibers illustrated in FIG. 1, different types of polymers, for example, polymers A and B, simultaneously flow into one base 10, but single fiber spinning illustrated in FIG. 2. In the base pack, only one of the single types of polymers A or B flows independently into each base 10.

  At that time, in the spinneret pack illustrated in FIG. 2, the multifilament yarns composed of two different types of polymers A and B from two different bases 10 have different properties chemically or physically. After the application, these are mixed and mixed and wound up. Then, after melt spinning, it is possible to obtain a yarn that has already become a combined yarn / mixed yarn at the same time as melt spinning, unlike the case where each yarn group having different properties is combined / mixed. .

  Furthermore, it is also possible to obtain a fiber composed of a single type of polymer by making the polymer A and the polymer B not the different types of polymers different from each other but the same type of polymer. At that time, the number of yarn packages to be wound is a multiple or more than that for winding composite fiber yarns or mixed fiber yarns. It is preferable that However, when the obtained yarn is combined, the number of packages can be reduced to half or less according to the number of yarns to be combined.

  As described above, in the present invention, a plurality of spinneret packs having different structures as shown in FIGS. 1 and 2 are shared by the same melt spinning apparatus. Thus, as is clear from sharing the spinneret pack having different functions in one common melt spinning apparatus, in the melt spinning apparatus used in the present invention, the place where the spinneret pack is attached (this part is `` It is important that the specifications relating to the mounting structure, mounting shape, etc. (called “pack dome”) are designed not to depend on the specifications of the spinneret pack to be mounted.

  From this point of view, regarding the spinneret pack on the mounting side, it is desirable that the specifications are essentially the same in terms of design, apart from small differences regarding the specifications such as the outer shape and the polymer inlet. Needless to say. However, although detailed description thereof is omitted, the spinneret pack is attached to the pack dome by interposing an intermediate member between the pack dome on the melt spinning apparatus side and the spinneret pack attached to the pack dome. Anyway. However, in this case, if the intermediate member and the spinneret pack are integrated into one body and this is considered as a new spinneret pack, it can be said that it is the same as the case of the pack dome and the spinneret pack attached to the pack dome. .

  As is clear from the above description, in the present invention, the design of the pack dome of the melt spinning apparatus is based on the spinneret pack for composite fibers that is assumed to have the most complicated mounting structure. Design the mounting structure. This is because, in this way, the pack dome mounted with the spinneret pack for melt-spinning a single polymer fiber is reduced to a simpler mounting structure. It is because it can respond easily to designing.

  Further, as described above, since the pack dome is designed in accordance with the spinneret pack for composite fibers, the spinneret pack for composite fibers suitable for this pack dome can of course be designed very easily. . Thus, the problem is the design of a single-fiber spinneret pack for melt spinning a multifilament yarn made of a single type of polymer. In designing the single-fiber spinneret pack, one multifilament yarn spun from one single base 10 is counted as one spindle. In the present invention, a plurality of spindles are included in one spinneret pack. It is important to provide the base 10.

  That is, as illustrated in FIG. 1, in the spinneret pack for composite spinning, a plurality of types of polymers are merged in a single die to form a composite flow, and this composite flow is spun from a polymer discharge hole (spinning hole). Put out. On the other hand, in the spinneret pack for single fibers illustrated in FIG. 2, the process is illustrated in FIG. 1 until the polymers A and B are received from the same polymer introduction flow paths 4 and 5 as the spinneret pack for composite fibers. The same as the spinneret pack.

  However, in the spinneret pack of FIG. 2, the polymers A and B received in this way are not combined flows, but are separated from each other as they are, and are separated from each other. Each is supplied separately to each cap 10. Then, each single-type polymer in a separated state is spun from each die 10 as a multifilament yarn. That is, in the spinneret pack of FIG. 2, the bases 10 are provided in a number corresponding to each of the polymers supplied from the polymer introduction channels 4 and 5 in a separated state independently of each other.

  As described above, in the spinneret pack of the present invention, as in the embodiment illustrated in FIGS. 1 and 2, the number of polymer introduction channels 4 and 5 for receiving the polymer independently into the spinneret pack is as follows. The same. However, the polymer after receiving is joined to form a composite flow for spinning the composite fiber, or it is individually separated into the multi-piece base group 10 without being joined after receiving. Then, it is selected whether to spin each multifilament yarn made of a single polymer. Then, by selecting the spinneret pack to be used in this way, only one common general-purpose melt spinning apparatus is installed without separately installing each dedicated melt spinning apparatus for composite fibers or single fibers. As a result, it is possible to obtain a melt spinning apparatus capable of spinning a composite fiber or a single fiber.

  Finally, the arrangement of the base group 10 in the spinneret pack illustrated in FIG. 2 will be briefly described. This relates to the cooling method of the multifilament yarn group spun from the base group 10. That is, when using a so-called “horizontal blow type yarn cooling device” in which cooling air is blown at a substantially right angle so as to cross the yarn group spun by blowing cooling air from one direction, FIG. As illustrated, it is necessary to dispose the base group 10 in a single row (in series), that is, in a straight line.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a plan view illustrating an embodiment of a spinneret pack for a composite fiber according to the present invention (FIG. 1A) and a cross-sectional view taken along line X-X ′ in FIG. It is the top view (FIG.2 (a)) which illustrated one Embodiment of the spinneret pack for single fibers of this invention, and its Y-Y 'arrow sectional drawing (FIG.2 (b)).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper pack body 2 Middle part pack body 3 Lower pack body 4 Polymer A introduction flow path 5 Polymer B introduction flow path 6 Polymer A filtration part 7 Polymer B filtration part 8 Polymer A mouthpiece introduction hole 9 Base inlet 10 Base

Claims (4)

  “Two or more polymers of different types” and “two or more polymers of the same type or different types” that can be individually and commonly mounted on the same general-purpose melt spinning apparatus and are independently introduced from the melt spinning apparatus side. A spinneret pack for composite fibers and a spinneret pack for single fibers, each of which spins a composite fiber and a single fiber, each of the spinneret packs for a composite fiber being independent of the melt spinning apparatus. A composite fiber base for spinning a composite flow in which different types of introduced polymers are joined in a base pack is mounted, and the other single fiber spinneret pack is independently introduced from the melt spinning apparatus. A single-fiber base that is received and spun as each single-type polymer in a state of being separated from each other without joining different polymers of the same type or the same type was mounted. Spinneret pack shared universal melt spinning apparatus.   The spinneret pack shared with the general-purpose melt spinning apparatus according to claim 1, wherein a spinneret for composite fibers is mounted on the spinneret pack for composite fibers. The spinneret group for single fibers to be mounted on a single fiber for spinneret pack and wherein the kite is disposed on a straight line, shared universal melt spinning apparatus according to claim 1 or claim 2 Spinneret pack.   The general-purpose product according to any one of claims 1 to 3, wherein the spinneret pack for composite fibers is a base pack for melt spinning core-sheath type composite single fiber group, sea-island type single composite fiber group, or side-by-side type single composite fiber group. Spinneret pack shared by melt spinning equipment.

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