A spinneret with skin-core structure for preparing antistatic spandex

Abstract

The present application provides a spinneret with a skin-core structure for preparing antistatic spandex, comprising several groups of spinnerets, each group of spinnerets comprising: two skin material feed ports, and a core material feed port located inside the two skin material feed ports, as well as a core layer spinneret and a skin layer spinneret arranged around the outside of the core layer spinneret; the core layer spinneret is provided with a core layer material accommodating cavity, a core layer material extrusion cavity, and a core layer material discharge channel coaxially connected from top to bottom on the spinneret; the skin layer spinneret is provided with a skin layer material accommodating cavity, a skin layer material extrusion cavity, and a skin layer material discharge channel coaxially connected from top to bottom on the spinneret. Through the skin-core structure design, two kinds of spandex spinning solutions containing antistatic agents can be prepared, and the skin layer and the core layer are fed through the spinneret respectively, so as to prepare antistatic spandex containing antistatic agents in both the inner and outer layers, thereby effectively preventing the influence of stretching and washing on the antistatic effect.

Description

Technical Field

[0001] The present application relates to the technical field of spandex preparation, and in particular to a spinneret with a skin-core structure for preparing antistatic spandex. Background Art

[0002] The preparation of antistatic spandex is usually to disperse the antistatic agent in the spinning solution and then dry-spin to obtain antistatic spandex fiber, or to evenly coat the antistatic agent on the surface of the spandex yarn after spinning. However, since spandex has good tensile properties, its antistatic properties will decrease after the spandex is stretched. In addition, the antistatic spandex prepared by coating the antistatic agent may remove the antistatic agent coated on the surface of the spandex yarn, reducing the antistatic effect, because the spandex has a water washing and oil removal process in the subsequent application. Utility Model Content

[0003] The technical problem to be solved by the present application is to provide a spinneret with a skin-core structure for the preparation of antistatic spandex, so as to avoid the reduction of the antistatic effect caused by the stretching of the antistatic spandex or the reduction of the antistatic effect by subsequent washing of the spandex.

[0004] In order to solve the above problems, the present application provides a spinneret with a skin-core structure for preparing antistatic spandex, on which a plurality of groups of spinnerets are horizontally arranged; each group of spinnerets includes: two skin material feed ports arranged longitudinally on the outer side of the top of the spinneret, a core material feed port located on the inner side of the two skin material feed ports, and a core layer spinneret and a skin layer spinneret arranged around the outside of the core layer spinneret; the core layer spinneret is provided with a core layer material cavity, a core layer material extrusion cavity, and a core layer material discharge channel coaxially connected to each other from top to bottom on the spinneret, and the inner diameter of the core layer material discharge channel is smaller than the inner diameter of the core layer material cavity; the skin layer spinneret is provided with a lower skin layer material cavity, a skin layer material extrusion cavity, and a skin layer material discharge channel coaxially connected to each other from top to bottom on the spinneret, and the inner diameter of the skin layer material discharge channel is smaller than the inner diameter of the skin layer material cavity; the core layer material feed port is connected to the core layer material cavity, and the skin layer material feed port is connected to the skin layer material cavity.

[0005] The skin-core structure of the spinneret can realize the spinning of the skin-core structure spandex yarn. When the spinneret is working, the core layer material and the skin layer material are respectively extruded through their respective feed ports, cavities, extrusion cavities and discharge channels, and are formed into spandex fibers with skin-core structure during the spinning process. Through the skin-core structure design, two spandex spinning solutions containing antistatic agents can be prepared, and the skin layer and the core layer are respectively fed through the spinneret to prepare antistatic spandex containing antistatic agents in both the inner layer and the outer layer, which effectively prevents the influence of stretching and washing on the antistatic effect. The two spandex spinning solutions containing antistatic agents can use different types or addition amounts of antistatic agents. The design improves the preparation efficiency and product quality of antistatic spandex, and ensures the durability and stability of the antistatic effect. It can effectively solve the problems faced by antistatic spandex in the preparation process, and improve the antistatic effect and stability of the product.

[0006] In order to ensure uniform flow of the material when entering the spinneret, according to one option of the above scheme of the present invention, the core layer material cavity, the core layer material discharge channel, the skin layer material cavity, and the skin layer material discharge channel are all columnar cavities.

[0007] In order to facilitate uniformity in extrusion of materials, according to one option of the above solution of the present invention, the core layer material extrusion cavity and the skin layer material extrusion cavity are both truncated cone-shaped cavities with the upper bottom facing downward.

[0008] According to an option of the above solution of the present invention, the cortex material chamber is connected to the cortex material feed port through a cortex material feed channel.

[0009] According to an option of the above scheme of the present invention, the cortical material cavity includes: an upper cortical material cavity and a lower cortical material cavity, the lower cortical material cavity is located below the upper cortical material cavity, and the inner diameter of the upper cortical material cavity is greater than the inner diameter of the lower cortical material cavity.

[0010] According to an option of the above solution of the present invention, the upper cortical material receiving cavity and the cortical material inlet channel are connected by a cortical material connecting channel perpendicular to the upper cortical material receiving cavity and the cortical material inlet channel.

[0011] According to another option of the above solution of the present invention, the skin layer material cavity only includes: an upper skin layer material cavity, the upper skin layer material cavity is connected to the skin layer material extrusion cavity below, and the skin layer material extrusion cavity is an eccentric cone cavity with the upper bottom facing downward.

[0012] According to an option of the above solution of the present invention, each group of spinning parts includes one or two core layer spinning parts.

[0013] The beneficial effects of this application are:

[0014] The skin-core structure of the spinneret can realize the spinning of the skin-core structure spandex yarn. When the spinneret is working, the core layer material and the skin layer material are respectively extruded through their respective feed ports, cavities, extrusion cavities and discharge channels, and are formed into spandex fibers with skin-core structure during the spinning process. Through the skin-core structure design, two spandex spinning solutions containing antistatic agents can be prepared, and the skin layer and the core layer are respectively fed through the spinneret to prepare antistatic spandex containing antistatic agents in both the inner layer and the outer layer, which effectively prevents the influence of stretching and washing on the antistatic effect. The two spandex spinning solutions containing antistatic agents can use different types or addition amounts of antistatic agents. The design improves the preparation efficiency and product quality of antistatic spandex, and ensures the durability and stability of the antistatic effect. It can effectively solve the problems faced by antistatic spandex in the preparation process, and improve the antistatic effect and stability of the product.

[0015] In addition to the technical problems solved by the utility model described above, the technical features that constitute the technical solution and the advantages brought by the technical features of the technical solution, other technical problems that can be solved by the skin-core structure spinneret for the preparation of antistatic spandex of the utility model, other technical features included in the technical solution and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the application scenario of the spinneret with a skin-core structure used for the preparation of antistatic spandex in the embodiment of the present application;

[0017] Figure 2 Schematic diagram of a spinneret with a skin-core structure used for preparing antistatic spandex in an embodiment of the present application;

[0018] Figure 3 This is a cross-sectional schematic diagram of an embodiment of a spinneret with a skin-core structure of the present application;

[0019] Figure 4 It is a cross-sectional schematic diagram of another embodiment of the spinneret of the skin-core structure of the present application;

[0020] Description of reference numerals:

[0021] 1000, skin-core structure spinneret; 2000, spinning tunnel;

[0022] 1. Spinning section; 2. Feeding port for skin material; 3. Feeding port for core material;

[0023] 4. core layer spinning section; 41. core layer material chamber; 42. core layer material extrusion chamber; 43. core layer material discharge channel;

[0024] 5. Cortex spinning section; 51. Cortex material cavity; 511. Upper cortex material cavity; 512. Lower cortex material cavity; 52. Cortex material extrusion cavity; 53. Cortex material discharge channel;

[0025] 61. Cortex material inlet channel; 62. Cortex material connecting channel. DETAILED DESCRIPTION

[0026] The following is a detailed description of the embodiments of the technical solution of the present application in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 An embodiment of a spinneret with a skin-core structure used for preparing antistatic spandex in the present application is illustrated. The spinneret with a skin-core structure 1000 is arranged above a spandex yarn spinning tunnel 2000 .

[0028] like Figure 2 The overall schematic diagram of the skin-core structure spinneret 1000 is shown, and a plurality of groups of spinnerets are arranged transversely on the skin-core structure spinneret 1000, such as Figure 3 to Figure 4 The cross-sectional view of the spinneret is shown; each group of spinnerets 1 comprises: two skin material feed ports 2 arranged longitudinally on the outer side of the top of the spinneret, a core material feed port 3 located on the inner side of the two skin material feed ports 2, a core layer spinneret 4 and a skin layer spinneret 5 arranged around the outside of the core layer spinneret 4; the core layer spinneret 4 is provided with a core layer material accommodating cavity 41, a core layer material extruding cavity 42, a core layer material discharging cavity 43 and a core layer material discharging cavity 44 in a coaxial manner from the top to the bottom of the spinneret. Channel 43, the inner diameter of the core layer material discharge channel 43 is smaller than the inner diameter of the core layer material cavity 41; the skin layer spinneret portion 5 is coaxially arranged on the spinneret from top to bottom in sequence to communicate with the skin layer material cavity 51, the skin layer material extrusion cavity 52, and the skin layer material discharge channel 53, the inner diameter of the skin layer material discharge channel 53 is smaller than the inner diameter of the skin layer material cavity 51; the core layer material feed port 3 is connected to the core layer material cavity 41, and the skin layer material feed port 2 is connected to the skin layer material cavity 51.

[0029] In one embodiment of the present application, by preparing two kinds of spandex spinning solutions containing antistatic agents, and feeding the materials through the spinneret from the sheath material feed port 2 and the core material feed port 3 respectively, the spinning of sheath-core structure spandex yarns can be achieved. The two kinds of spandex spinning solutions containing antistatic agents can use different types of antistatic agents or added amounts to prepare antistatic spandex containing antistatic agents in both the inner and outer layers.

[0030] The spinneret is arranged above the spandex spinning tunnel, and is used to extrude the core layer and the skin layer materials simultaneously, and form spandex fibers with a skin-core structure through a spinning process.

[0031] Several groups of spinning sections 1 are arranged on the spinneret, and each group of spinning sections 1 includes two skin material feed ports 2 and core material feed ports 3. In the core layer spinning section 4, from top to bottom, there are a core layer material cavity 41, a core layer material extrusion cavity 42 and a core layer material discharge channel 43. The inner diameter of the core layer material discharge channel 43 is smaller than the inner diameter of the core layer material cavity 41 to form a higher pressure to ensure that the core layer material can be extruded uniformly and continuously. In the skin layer spinning section 5, there are also a skin layer material cavity 51, a skin layer material extrusion cavity 52 and a skin layer material discharge channel 53 from top to bottom. The inner diameter of the skin layer material discharge channel 53 is smaller than the inner diameter of the skin layer material cavity 51 to provide sufficient pressure. The core layer material feed port 3 is connected to the core layer material cavity 41. The skin layer material feed port 2 is connected to the skin layer material cavity 51.

[0032] When the spinneret is working, the core layer material and the skin layer material are respectively extruded through their respective feed ports, cavities, extrusion cavities and discharge channels, and are simultaneously extruded to form spandex fibers with a skin-core structure during the spinning process.

[0033] Through the skin-core structure design, two kinds of spandex spinning solutions containing antistatic agents can be prepared, and antistatic spandex containing antistatic agents in both the inner and outer layers can be prepared through the spinneret, effectively preventing the influence of stretching and washing on the antistatic effect. The two kinds of spandex spinning solutions containing antistatic agents can use different types of antistatic agents or addition amounts. This design improves the preparation efficiency and product quality of antistatic spandex and ensures the durability and stability of the antistatic effect.

[0034] In summary, the sheath-core spinneret design effectively solves the problems faced by antistatic spandex in the preparation process through reasonable feeding and extrusion structure, and improves the antistatic effect and stability of the product.

[0035] In one embodiment of the present application, the core layer material cavity 41 , the core layer material discharge channel 43 , the skin layer material cavity 51 , and the skin layer material discharge channel 53 are all columnar cavities.

[0036] The columnar cavity can ensure that the material is evenly distributed during the flow process, especially before entering the smaller extrusion cavity and discharge channel, which helps to form a uniform fiber structure during the spinning process. The shape of the columnar cavity is conducive to the smooth flow of the material and reduces the possibility of blockage and uneven flow. In this embodiment, the core material cavity 41 is used to store and pre-distribute the spandex spinning solution to ensure that these materials can enter the extrusion cavity evenly and continuously when needed. The core material discharge channel 43 is located after the extrusion cavity and is the last section of the core material flowing to the spinneret outlet. Since the inner diameter is smaller than the extrusion cavity, a certain pressure will be generated here, which helps the material to be extruded more evenly. The skin material cavity 51 is similar to the core material cavity. The skin material discharge channel 53 is also located after the extrusion cavity and is the last section of the skin material flowing to the spinneret outlet. Similarly, since the inner diameter is smaller than the cavity, a certain pressure will be generated to ensure that the skin material can be tightly wrapped around the core material.

[0037] In one embodiment of the present application, the core material extrusion cavity 42 and the skin material extrusion cavity 52 are both truncated cone-shaped cavities with the upper bottom facing downward. The truncated cone-shaped cavity has a larger upper bottom and a smaller lower bottom, and the entire shape gradually decreases from top to bottom, allowing a certain pressure gradient to be generated during the material flow process, which helps the material to be extruded more evenly.

[0038] like Figure 3 In one embodiment, the cortex material cavity 51 is connected to the cortex material feed port 2 via a cortex material feed channel 61 .

[0039] like Figure 3 In an optional embodiment, the cortex material chamber includes: an upper cortex material chamber 511 and a lower cortex material chamber 512, wherein the lower cortex material chamber 512 is located below the upper cortex material chamber 511, and the inner diameter of the upper cortex material chamber 511 is greater than the inner diameter of the lower cortex material chamber 512. The upper cortex material chamber 511 and the cortex material inlet channel 61 are connected by a cortex material connecting channel 62 which is perpendicular to the upper cortex material chamber 511 and the cortex material inlet channel 61.

[0040] In this embodiment, the upper cortical material chamber 511 is located at the top and has a larger inner diameter. The larger inner diameter allows more cortical material to be stored here, thereby ensuring that there is sufficient material supply during the spinning process. The lower cortical material chamber 512 is located below the upper cortical material chamber 511 and has a smaller inner diameter. The smaller inner diameter helps to perform a certain degree of compression and pre-distribution of the material before it enters the cortical material extrusion chamber, thereby ensuring that the material can be extruded more evenly. Through the design of the upper cortical material chamber 511 and the lower cortical material chamber 512, the cortical material can be better pre-distributed and compressed before entering the extrusion chamber, thereby ensuring that the material can be more evenly distributed during the spinning process.

[0041] The cortex material inlet channel 61 is a channel connecting the cortex material feed port 2 and the cortex material cavity, through which the cortex material enters the cavity to provide material for the spinning process. The cortex material connecting channel 62 is a channel perpendicular to the upper cortex material cavity 511 and the cortex material inlet channel 61, connecting the upper cortex material cavity 511 and the cortex material inlet channel 61, allowing the cortex material to flow smoothly from the inlet channel into the cavity.

[0042] like Figure 4 In another embodiment, the difference from the above embodiment is that the cortex material chamber includes: an upper cortex material chamber 511, and the upper cortex material chamber 511 is connected to a cortex material extrusion chamber 52, and the cortex material extrusion chamber 52 is an eccentric truncated cone chamber with the upper bottom facing downward. This embodiment makes some adjustments to the design of the cortex material chamber and the cortex material extrusion chamber 52. The cortex material extrusion chamber 52 is directly connected to the lower part of the upper cortex material chamber 511, which increases the capacity of the cortex material extrusion chamber 52. The cortex material extrusion chamber 52 is designed as an eccentric truncated cone chamber with the upper bottom facing downward. Compared with the traditional truncated cone cavity, the eccentric truncated cone cavity maintains a large upper bottom and a small lower bottom, while its axis does not coincide with the central axis of the spinneret, forming a certain eccentricity. Due to the design of the eccentric truncated cone cavity, the cortex material may be guided or deflected to a certain extent when flowing into the extrusion chamber, which helps to better control the flow and distribution of the material.

[0043] In an optional embodiment, each group of spinning sections 1 includes one or two core layer spinning sections 4 .

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "upper", "lower", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "set", "provided with", "connected", "installed" and the like should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrated; they can be directly connected, or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A spinneret with a skin-core structure for preparing antistatic spandex, characterized in that: A plurality of groups of spinning parts (1) are arranged transversely on the spinneret of the skin-core structure; Each group of the spinnerets (1) comprises: two skin material feed ports (2) arranged longitudinally on the outer side of the top of the spinneret, a core material feed port (3) located inside the two skin material feed ports (2), a core layer spinneret (4) and a skin layer spinneret (5) arranged around the core layer spinneret (4); The core layer spinning section (4) is provided with a core layer material containing cavity (41), a core layer material extrusion cavity (42), and a core layer material discharge channel (43) which are coaxially connected and arranged in sequence from the top to the bottom of the spinneret, and the inner diameter of the core layer material discharge channel (43) is smaller than the inner diameter of the core layer material extrusion cavity (42); The skin layer spinning section (5) is provided with a skin layer material holding cavity (51), a skin layer material extrusion cavity (52), and a skin layer material discharge channel (53) which are connected and coaxially arranged in sequence from the top to the bottom of the spinneret, and the inner diameter of the skin layer material discharge channel (53) is smaller than the inner diameter of the skin layer material holding cavity (51); The core layer material feed port (3) is in communication with the core layer material receiving cavity (41), and the skin layer material feed port (2) is in communication with the skin layer material receiving cavity (51).

2. The spinneret with a skin-core structure for preparing antistatic spandex according to claim 1, characterized in that: The core layer material accommodating cavity (41), the core layer material discharging channel (43), the skin layer material accommodating cavity (51), and the skin layer material discharging channel (53) are all columnar cavities.

3. The spinneret with a skin-core structure for preparing antistatic spandex according to claim 1, characterized in that: The core layer material extrusion cavity (42) and the skin layer material extrusion cavity (52) are both truncated cone-shaped cavities with the upper bottom facing downward.

4. The spinneret with a skin-core structure for preparing antistatic spandex according to claim 1, characterized in that: The cortex material chamber (51) is connected to the cortex material feed port (2) via a cortex material feed channel (61).

5. The spinneret with a skin-core structure for preparing antistatic spandex according to claim 4, characterized in that: The skin layer material receiving cavity comprises: an upper skin layer material receiving cavity (511) and a lower skin layer material receiving cavity (512); the lower skin layer material receiving cavity (512) is located below the upper skin layer material receiving cavity (511); and the inner diameter of the upper skin layer material receiving cavity (511) is greater than the inner diameter of the lower skin layer material receiving cavity (512).

6. The spinneret with a skin-core structure for preparing antistatic spandex according to claim 5, characterized in that: The upper cortical material receiving cavity (511) and the cortical material inlet channel (61) are connected via a cortical material connecting channel (62) perpendicular to the upper cortical material receiving cavity (511) and the cortical material inlet channel (61).

7. The spinneret with a skin-core structure for preparing antistatic spandex according to claim 4, characterized in that: The skin layer material receiving cavity only comprises: an upper skin layer material receiving cavity (511); the upper skin layer material receiving cavity (511) is connected to a skin layer material extrusion cavity (52) below; the skin layer material extrusion cavity (52) is an eccentric frustum cavity with the upper bottom facing downward.

8. The spinneret with a skin-core structure for preparing antistatic spandex according to claim 1, characterized in that: Each group of the spinning sections (1) comprises one or two core layer spinning sections (4).

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