Hollow polyester staple fiber shaped like Chinese character'mi 'and spinneret plate

Abstract

The utility model discloses a *-shaped hollow polyester staple fiber and a spinneret plate, and belongs to the technical field of chemical fiber spinning equipment. The spinneret plate is provided with a plurality of guide holes, one end of each guide hole is provided with a micro hole, the other end of each guide hole is communicated with a spiral distribution groove, one guide hole and the micro hole aligned with the guide hole jointly form a spinneret hole, and eight fins are arranged at the end, away from the guide holes, of each micro hole. According to the spinneret plate, the structure of the spinneret plate is improved, the micro holes of the spinneret plate are arranged to be of the *-shaped hollow structure, the cross section of fibers sprayed out of the spinneret plate is also of the *-shaped hollow structure, liquid can be conducted through the outer sides of the fibers, and due to the fact that the middle portions of the fibers manufactured through the improved spinneret plate are hollow, the fibers are not prone to falling off. Through the hollow structure inside the fiber, a static air layer effectively obstructs heat transfer, heat convection and heat conduction are reduced, and the purpose of simultaneously improving the moisture conduction performance and the heat preservation performance is achieved.

Description

Technical Field

[0001] This utility model relates to a cross-shaped hollow polyester staple fiber and a spinneret, belonging to the technical field of chemical fiber spinning equipment. Background Technology

[0002] Conventional polyester fibers made from conventional spinnerets have significant drawbacks: their circular cross-sectional structure results in a small specific surface area, a single moisture conduction path, and a low moisture absorption rate, which can easily cause a stuffy feeling when worn; therefore, conventional spinnerets cannot produce fibers that meet the requirements.

[0003] Traditional fiber structures cannot effectively improve both moisture-wicking and heat-insulating properties. Therefore, it is necessary to improve the spinneret so that the fibers spun out by the spinneret have good moisture-wicking and heat-insulating properties. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cross-shaped hollow polyester staple fiber and a spinneret, which solves the problem that conventional polyester fibers made by spinnerets in the prior art have poor moisture-wicking and heat-insulating properties.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: a cross-shaped hollow polyester staple fiber and a spinneret, wherein the spinneret has a plurality of guide holes, one end of the plurality of guide holes has a micro hole, the other end of the plurality of guide holes is connected to a spiral distribution groove, one guide hole and the aligned micro hole together form a spinneret hole, eight fins are provided on the end of the micro hole away from the guide hole, the eight fins are respectively fixed to the micro hole, and there are gaps between adjacent fins to form a cross-shaped hollow structure, and the ends of the fins are rounded.

[0006] The present invention is further configured such that: the spinneret material is a high-temperature resistant alloy, the plate thickness is 10mm to 30mm, and the number of spinneret holes is 700 to 2000.

[0007] The present invention is further configured such that the number of spinnerets on the spinneret is 700 to 1200 or 1200 to 2000.

[0008] The present invention is further configured such that: the spinneret has 700 to 1200 spinneret holes, the micro-holes 3 are distributed in multiple concentric circles, the spacing between adjacent micro-holes in each layer is 1 to 3 times the hole diameter, and the angular offset between adjacent micro-holes in adjacent layers is 1° to 5°.

[0009] The present invention is further configured such that: the spinneret has 1200 to 2000 spinneret holes, the micro-holes are distributed in 5 to 10 groups of spiral arrays, the spacing between each group of micro-holes is 0.58 mm to 1.5 mm, the number of micro-holes in each group is 100 to 300, the starting angle of the spiral array is arranged alternately in the order of 0°, 90° and 180°, and a transition cone angle of 20° to 60° is provided between the guide hole and the micro-hole.

[0010] A type of hollow polyester staple fiber with a cross-shaped pattern is made from a spinneret.

[0011] The beneficial effects of this invention are as follows: In the production of polyester staple fiber, by improving the structure of the spinneret and setting the micro-holes of the spinneret to a cross-shaped hollow structure, the cross-section of the fiber ejected from the spinneret also becomes a cross-shaped hollow structure. At this time, liquid can be conducted through the outside of the fiber. Furthermore, since the fiber produced by the improved spinneret is hollow in the middle, the hollow structure inside the fiber effectively blocks heat transfer by the static air layer, reducing heat convection and heat conduction, thereby achieving the goal of simultaneously improving moisture-wicking and heat-insulating properties. Attached Figure Description

[0012] Figure 1 This is a top view schematic diagram of the cross-shaped hollow spinneret structure of this utility model;

[0013] Figure 2 This is a side view of the cross-shaped hollow spinneret structure of this utility model;

[0014] Figure 3 This is a cross-sectional view of the guide hole in this utility model;

[0015] Figure 4 This is an enlarged cross-sectional view of the micropores in this utility model;

[0016] Figure 5 This is a schematic diagram of the cross-section of the cross-section of the cross-shaped hollow polyester staple fiber of this utility model.

[0017] In the diagram: 1. Spinneret; 2. Guide hole; 3. Micropore; 4. Spiral distribution groove; 5. Fin; 6. Fiber sheet; 7. Hollow square tube; 8. Moisture guide groove. Detailed Implementation

[0018] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0019] like Figures 1 to 4As shown, a cross-shaped hollow polyester staple fiber and a spinneret are disclosed. The spinneret 1 has several guide holes 2, and micro-holes 3 are formed at one end of each guide hole 2. A transition cone angle of 20° to 60° is set between the guide holes 2 and the micro-holes 3. The other end of the guide holes 2 is connected to a spiral distribution groove 4, which is located at the inlet end of the spinneret 1. The spiral distribution groove 4 has a depth of 0.5 to 3 mm and a width of 0.5 to 5 mm. The depth of the guide holes 2 is 10 to 20 mm. The guide holes 2 and the micro-holes 3 are concentric circles with a diameter ratio of 2-3:1. One guide hole 2 and the aligned micro-holes 3 together form a spinneret orifice. Eight fins are provided on the end of the micro-hole away from the guide hole. The eight fins are fixed to the micro-holes respectively, and there are gaps between adjacent fins 5 to form a cross-shaped hollow structure. The ends of the fins 5 are rounded.

[0020] The spinneret 1 is made of a high-temperature resistant alloy. The thickness of the spinneret 10 is 10mm to 30mm, and the number of spinneret holes is 700 to 2000. The spiral distribution groove 4 is connected to the spinneret holes. The surface of the spinneret 1 is provided with an annular guide groove 7. The micro-holes 3 are located in the guide groove 7. The depth of the guide groove 7 is 0.1mm to 3mm, the width of the guide groove 7 is 0.1mm to 5mm, and the bottom angle of the guide groove 7 is 20° to 60°.

[0021] like Figure 1 As shown, the spinneret 1 has 700 to 1200 or 1200 to 2000 spinnerets. For high-orifice spinnerets 1, the depth of the guide holes 2 gradually increases, which can effectively reduce degradation caused by melt retention. The spinneret 1 has 700 to 1200 spinnerets, and the micro-holes 3 are distributed in multiple concentric circles. The spacing between adjacent micro-holes in each layer is 1 to 3 times the hole diameter, and the angular offset between adjacent micro-holes 3 in adjacent layers is 1° to 5°. The spinneret 1 has 1200 to 2000 spinnerets, and the micro-holes 3 are distributed in 5 to 10 spiral arrays, with a group spacing of 0.58 mm to 1.5 mm. Each group has 100 to 300 holes, and the starting angles alternate between 0°, 90°, and 180°. Adjacent micro-holes 3 in adjacent layers are positioned adjacently, and the angular offset between adjacent micro-holes 3 is 1° to 5°.

[0022] A type of cross-shaped hollow polyester staple fiber is made by extruding molten fibers through a spinneret.

[0023] like Figure 5 As shown, the cross-section of the polyester staple fiber is hollow in the middle to form a hollow square tube 7. Eight fiber sheets 6 intersect on the outside of the hollow square tube 7, forming a cross-shaped hollow structure. There are gaps between adjacent fiber sheets 6 to form moisture-wicking grooves 8. The fiber single filament fineness is 1.2 to 6.67 dtex.

[0024] In the production of polyester staple fiber, by improving the structure of the spinneret 1, the micro-holes 3 of the spinneret 1 are set as a cross-shaped hollow structure, so that the cross-section of the fiber sprayed by the spinneret 1 also becomes a cross-shaped hollow structure. At this time, liquid can be conducted through the outside of the fiber. Furthermore, since the fiber produced by the improved spinneret 1 is hollow in the middle, the hollow structure inside the fiber effectively blocks heat transfer by the static air layer, reducing heat convection and heat conduction, thereby achieving the goal of simultaneously improving moisture-wicking and heat-insulating properties.

[0025] Due to the presence of fins 5, the radial fins 5 of the cross-shaped hollow fiber form uniformly distributed grooves between adjacent fibers, which quickly absorb sweat through capillary effect and guide moisture along the fiber axis. At the same time, the air layer stored inside the hollow structure forms a network with the external grooves, which accelerates sweat evaporation by taking advantage of the approximately 3-fold increase in specific surface area. The directional flow guidance of the grooves and the air pressure balance of the hollow part work together to prevent water backflow, thereby achieving a highly efficient dynamic sweating cycle of moisture absorption-diffusion-evaporation. Meanwhile, the static air layer inside the hollow structure effectively blocks heat transfer, reducing heat convection and heat conduction. The dry surface formed after the grooves guide moisture further reduces body heat loss caused by moisture evaporation, thus achieving the dual functions of moisture wicking and heat insulation, and maintaining thermal comfort during dynamic sweating.

[0026] The star-shaped hollow fiber produced by spinneret 1 has a star-shaped hollow cross section and functional properties, such as cooling and heat preservation.

[0027] The preferred technical solution for this device is as follows:

[0028] The spinneret 1 has a thickness of 18mm and 720 spinneret holes.

[0029] The middle square tube has a side length of 0.58mm and a width of 0.06mm. The fin 5 has a length of 0.4mm and a width of 0.06mm. The rounded corner diameter of the end of the fin 5 is 0.14mm.

[0030] The transition cone angle between guide hole 2 and microhole 3 is 60°;

[0031] The diameter of guide hole 2 is 2.5 mm; the depth of guide hole 2 is 13 mm; the diameter ratio of guide hole 2 to micro-hole 3 is 2:1.

[0032] The spacing between the three micropores is 1.7 times the pore diameter; the angle between the three micropores in adjacent layers is 3.5°.

[0033] The spiral distribution groove 4 has a depth of 1.5 mm and a width of 4 mm.

[0034] Installation and usage instructions:

[0035] The machine is connected to the spinning box via a flange and put into operation after preheating to 280℃. Spinning is performed on an LHV431 spinning machine with a pump supply of 760g / min, a winding speed of 900m / min, and a spinning temperature of 295℃. Drafting is performed on an LHV903 combined drafting machine with a draft ratio of 3.5 and a drafting temperature of 70℃.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spinneret, characterized in that: The spinneret (1) has several guide holes (2), one end of each guide hole (2) has a micro hole (3), and the other end of each guide hole (2) is connected to a spiral distribution groove (4). One guide hole (2) and the aligned micro hole (3) together form a spinneret hole. The micro hole (3) has 8 fins (5) at the end away from the guide hole (2). The 8 fins (5) are fixed to the micro hole (3) respectively, and there are gaps between adjacent fins (5) to form a cross-shaped hollow structure. The ends of the fins (5) are rounded.

2. A spinneret according to claim 1, characterized in that: The spinneret (1) is made of a high-temperature resistant alloy, the thickness of the spinneret (1) is 10mm to 30mm, and the number of spinneret holes on the spinneret (1) is 700 to 2000.

3. A spinneret according to claim 2, characterized in that: The number of spinnerets on the spinneret (1) is 700 to 1200 or 1200 to 2000.

4. A spinneret according to claim 3, characterized in that: The spinneret (1) has 700 to 1200 spinneret holes. The micropores (3) are distributed in multiple concentric circles. The spacing between adjacent micropores (3) in each layer is 1 to 3 times the diameter of the hole. The angular offset between adjacent micropores (3) in adjacent layers is 1° to 5°.

5. A spinneret according to claim 3, characterized in that: The spinneret (1) has 1200 to 2000 spinneret holes. The micro-holes (3) are distributed in 5 to 10 sets of spiral arrays. The spacing between each set of micro-holes (3) is 0.58 mm to 1.5 mm. The number of micro-holes (3) in each set is 100 to 300. The starting angle of the spiral array is arranged alternately in the order of 0°, 90° and 180°. A transition cone angle of 20° to 60° is provided between the guide hole (2) and the micro-holes (3).

6. A type of cross-shaped hollow polyester staple fiber, characterized in that: Made from a spinneret as described in any one of claims 1-5.

Images