Composite spinneret distribution plate
By designing a composite spinning distribution plate, the wear problem of the guide device caused by the distribution of external functional fiber components was solved, and the stable production and functional component distribution of the three-component self-crimping elastic fiber were realized, reducing development costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU ZJA NEW MATERIAL CO LTD
- Filing Date
- 2025-05-04
- Publication Date
- 2026-06-26
AI Technical Summary
In the current production of crimped elastic functional fibers, the components of the external conductive functional fibers are distributed on the fiber surface, which leads to wear of the conductive wire devices and affects the normal progress of processing and production.
A composite spinning distribution plate is used, which is equipped with virtual circular bosses and slits for the composite of three spinning melts, to realize the production of three-component self-crimping elastic functional fibers. By adjusting the slit depth, the melt flow rate and rheological state are optimized to achieve the distribution of functional components on the fiber cross section.
Stable production of three-component self-crimping elastic functional fibers has been achieved, reducing development costs. Furthermore, the melt flow rate can be adjusted according to melt characteristics, avoiding wear of conductive guide wire devices and meeting the functional requirements of different conductive microwave absorbing textiles.
Smart Images
Figure CN224411985U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spinning technology, and in particular to a composite spinning distribution plate. Background Technology
[0002] Bicomponent self-crimping filament is a type of bicomponent parallel fiber that does not require texturing and possesses permanent crimp and an elastic recovery rate of over 95%. It is obtained by composite spinning of two similar or compatible fiber-forming polymers with different heat shrinkage properties. Permanently crimped elastic fibers can be obtained in a single spinning process. Compared to texturized yarns produced through the POY-DTY process, it not only has better crimp stability but also lower production costs, and has been widely used.
[0003] The production of existing crimped elastic functional fibers uses the traditional POY-DTY process, which is feasible for internally conductive functional fibers, but for externally conductive functional fibers, the functional components are distributed on the fiber surface, resulting in greater roughness. This can easily wear down the conductive wire devices on the filament, directly affecting the normal progress of processing and production. Summary of the Invention
[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide a composite spinning distribution plate.
[0005] To achieve the above technical objectives and requirements, the technical solution adopted by this utility model is as follows: a composite spinning distribution plate for combining three types of spinning melts. The distribution plate is provided with a virtual circular boss with a diameter of R. The virtual circular boss corresponds one-to-one with the spinneret guide holes of the spinneret. The virtual circular boss has a first melt elliptical groove and a second melt elliptical groove distributed on the left and right sides. The first melt elliptical groove communicates with the first melt channel hole, and the second melt elliptical groove communicates with the second melt channel hole. The first melt elliptical groove and the second melt elliptical groove extend to the virtual circular boss and close up. The closing position is smaller than the diameter of the virtual circular boss and forms an arc connection. The virtual circular boss has 1-3 functional component melt channel holes. A slit with a depth of d is opened on the virtual circular boss in the direction towards the first melt elliptical groove and the second melt elliptical groove. The first melt channel hole, the second melt channel hole, and the functional component melt channel hole correspond to and communicate with the countersunk holes of the three annular melt distribution grooves on the back of the distribution plate.
[0006] Preferably, the diameter of the virtual circular boss is 1-1.2 times the diameter of the spinneret guide hole; the depth d of the slit ranges from 0.1-2 mm. The selection principle for the slit depth d is determined based on the intrinsic viscosity of the melt under spinning conditions, ensuring that the melt flow rate at this point is not too fast. If it is too fast, the two melts will mix turbulently when they merge, making the interface between the two components unclear; if the melt flow rate is too slow, the poor rheological state is not conducive to good spinning. A small slit depth d results in a fast melt flow rate, while a large slit depth d results in a slow melt flow rate.
[0007] Preferred application: The composite spinning distribution plate in the preparation of three-component self-crimping elastic functional composite fibers.
[0008] Compared with the traditional structure, the beneficial effects of this utility model are:
[0009] 1. The three-component distribution plate of this utility model can realize the production of three-component self-curling elastic functional fibers in a relatively simple way. Moreover, it can change the path of the functional component melt flowing out and merging with the non-conductive melt according to the position of the functional component melt channel, thereby realizing different functional component distributions on the fiber cross section and achieving the functional manifestation of different conductive and microwave absorbing textiles.
[0010] 2. The three-component distribution plate of this utility model corresponds one-to-one with the spinneret guide holes of the original spinneret, so it can be put into production without replacing the spinneret, thus reducing development costs.
[0011] 3. The three-component distribution plate of this utility model is ingeniously designed, and the depth d of the slit can be adjusted according to the melt characteristic parameters, thereby optimizing the composite state of the two melts and achieving the best spinning state. Attached Figure Description
[0012] Figure 1 This is a diagram showing the arrangement of the distribution plate of this utility model;
[0013] Figure 2 This is an enlarged view of the melt distribution and merging of this utility model;
[0014] Figure 3 This is a schematic diagram showing the height d of the virtual circular boss slit of this utility model;
[0015] In the figure: 1. First melt channel hole, 2. Second melt channel hole, 3. Functional component melt channel hole, 4. Virtual circular boss, 5. Corresponding position of the first melt annular distribution groove, 6. Corresponding position of the second melt annular distribution groove, 7. Corresponding position of the functional component melt annular distribution groove, 8. First melt elliptical groove, 9. Second melt elliptical groove, 10. Slit. Detailed Implementation
[0016] The present invention will be further described below.
[0017] See attached document Figure 1-3 A composite spinning distribution plate is used to composite three spinning melts to prepare three-component elastic conductive fibers. The distribution plate is provided with virtual circular bosses 4 of diameter R, each corresponding to a spinneret guide hole. The virtual circular bosses 4 have elliptical grooves 8 for the first melt and elliptical grooves 9 for the second melt distributed on the left and right sides. The first elliptical groove 8 communicates with a first melt channel hole 1, and the second elliptical groove 9 communicates with a second melt channel hole 2. The elliptical grooves 9 extend to the virtual circular bosses 4 and taper off. The taper position is smaller than the diameter of the virtual circular bosses 4 and forms an arc connection. The virtual circular bosses 4 are provided with 1-3 functional component melt channel holes 3. The virtual circular bosses 4 are provided with slits 10 of depth d in the direction towards the first melt elliptical groove 8 and the second melt elliptical groove 9. The first melt channel hole 1, the second melt channel hole 2, and the functional component melt channel hole 3 correspond to and communicate with the countersunk holes of the three annular melt distribution grooves on the back of the distribution plate.
[0018] The diameter of the virtual circular boss 4 is 1-1.2 times the diameter of the spinneret guide hole, and the depth d of the slit 10 ranges from 0.1 to 2 mm.
[0019] The application of the composite spinning distribution plate in the preparation of three-component self-crimping elastic functional composite fibers.
[0020] In one embodiment, the diameter of the virtual circular boss 4 is 1.15 times the diameter of the spinneret guide orifice, and the depth d of the slit 10 is 1 mm. During operation, two non-functional melts with different heat shrinkage properties enter their respective elliptical grooves from the first melt channel hole 1 and the second melt channel hole 2, respectively. They converge at the upper part of the spinneret guide orifice through the slit of depth d. The functional melt flows out through the functional component melt channel hole 3 and is carried by the non-functional component melt to the edge of the guide orifice, producing a streamlined effect.
[0021] In practical implementation, the distribution plate of this utility model is installed into the spinning assembly to spin self-winding conductive polyester fibers. One non-conductive melt is prepared by melting fiber-grade polyethylene terephthalate (PET), another non-conductive melt is prepared by melting fiber-grade polypropylene terephthalate (PTT), and the functional melt is prepared by melting polyester microwave absorbing masterbatch. These melts are respectively melt-extruded through an extruder, metered by a metering pump, and enter their respective melt channels in the assembly, finally reaching the distribution plate described in this utility model. After the three melts merge, they enter the spinneret guide holes and are ejected through the spinneret holes to form stable nascent fibers.
[0022] The above embodiments of this utility model are merely examples to clearly illustrate this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent technical solutions also fall within the scope of this utility model, and the patent protection scope of this utility model should be defined by each claim.
Claims
1. A composite spin distribution plate for use in the composite spinning of three spin melts, characterized in that: The distribution plate is provided with a virtual circular boss (4) with a diameter of R. The virtual circular boss (4) corresponds one-to-one with the spinneret guide holes of the spinneret. The virtual circular boss (4) has a first melt elliptical groove (8) and a second melt elliptical groove (9) distributed on the left and right sides. The first melt elliptical groove (8) communicates with the first melt channel hole (1), and the second melt elliptical groove (9) communicates with the second melt channel hole (2). The first melt elliptical groove (8) and the second melt elliptical groove (9) extend to the virtual circular boss. The platform (4) is closed, and the closing position is smaller than the diameter of the virtual circular boss (4) and forms an arc connection. The virtual circular boss (4) is provided with 1-3 functional component melt channel holes (3). The virtual circular boss (4) is provided with a slit (10) of depth d in the direction towards the first melt elliptical groove (8) and the second melt elliptical groove (9). The first melt channel hole (1), the second melt channel hole (2), and the functional component melt channel hole (3) correspond to and communicate with the countersunk hole of the annular melt distribution groove on the back of the distribution plate.
2. A composite spinneret plate according to claim 1, wherein: The diameter of the virtual circular boss (4) is 1-1.2 times the diameter of the spinneret guide hole, and the depth d of the slit (10) ranges from 0.1 to 2 mm.
3. A composite spinneret plate according to any one of claims 1-2, characterized in that: The application of the composite spinning distribution plate in the preparation of three-component self-crimping elastic functional composite fibers.