Fine denier special-section nylon fiber and its production process

Abstract

The present invention discloses a novel fine-denier special-shaped cross-section nylon fiber and a production process, and relates to the technical field of nylon fiber production. The nylon fiber includes a hollow triangular cross-sectional structure, which is the main body of the nylon fiber. A circular cross-sectional structure is arranged inside the hollow triangular cross-sectional structure, and diamond cross-sectional structures are arranged at the three vertex positions of the hollow triangular cross-sectional structure. When the circular cross-sectional structure serves as the core of the hollow triangular cross-sectional structure, the structural strength of the nylon fiber is effectively improved, and the nylon fiber has good breaking strength and breaking elongation. The diamond cross-sectional structures are arranged at the three corners of the hollow triangular cross-sectional structure as a trifoliate structure, so that the nylon fiber has good cohesion and is bulky and full. At the same time, the inclined surface of the diamond cross-sectional structure cooperates with the inclined surface of the hollow triangular cross-sectional structure to produce a "flash" effect, presenting a silk luster.

Description

Technical Field

[0001] The present invention relates to the technical field of nylon fiber production, in particular to novel fine-denier special-section nylon fibers and a production process. Background Art

[0002] Nylon is widely used in the clothing industry due to its excellent physical properties. In recent years, research on nylon filaments, especially differentiated nylon filaments that can meet people's needs, has developed rapidly.

[0003] Conventional nylon filaments have a circular cross-section, while shaped nylon filaments have non-circular cross-sections. Common shaped nylon filaments include triangles, trilobes, crosses, and I-shaped.

[0004] However, although triangular and trilobal nylon fibers have good gloss, they have poor bulk and structural strength, while cross-shaped and I-shaped nylon fibers have poor gloss and insufficient color after dyeing, making them inconvenient for users to use.

[0005] In view of the above problems, an improved new type of fine denier special-shaped cross-section nylon fiber and its production process are now designed. Summary of the Invention

[0006] The purpose of the present invention is to provide a novel fine-denier special-section nylon fiber and a production process to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A novel fine-denier special-section nylon fiber comprises a hollow triangular cross-section structure, which is the main body of the nylon fiber yarn. A circular cross-section structure is arranged inside the hollow triangular cross-section structure, and diamond cross-section structures are arranged at the three vertices of the hollow triangular cross-section structure.

[0009] As a further solution of the present invention, the connection points of the hollow triangular cross-sectional structure, the circular cross-sectional structure and the diamond cross-sectional structure are all configured to be arc-shaped, so as to facilitate the extrusion of the nylon fibers in a molten state.

[0010] As a further solution of the present invention: the hollow triangular cross-section structure is an equilateral triangle.

[0011] The production process of the new fine-denier special-shaped cross-section nylon fiber includes the following steps:

[0012] Step 1: Processing spinneret microholes with a combination of hollow triangular cross-sectional structure, circular cross-sectional structure and diamond cross-sectional structure on the spinneret.

[0013] Step 2: Place the dry nylon fiber slices into a furnace and heat them until they are molten.

[0014] Step 3: Extruding the molten nylon fibers in step 2 through the spinneret micropores to obtain nylon fiber yarns.

[0015] Step 4: The nylon fiber yarn in step 3 is subjected to monomer suction, side blowing cooling and gap blowing in sequence to obtain irregularly curved nylon fiber yarn.

[0016] Step 5: Oiling the nylon fiber yarn in step 4, stretching and shaping it, and then winding it into shape to obtain a finished nylon fiber yarn.

[0017] As a further solution of the present invention: in step 2 and step 3, the temperature of melting and extrusion is 360-270°C.

[0018] As a further solution of the present invention: in step 4, the temperature of the side-blowing cooling is 20-22° C., the humidity is 65-75%, and the wind speed is 0.62-0.66 m / s.

[0019] As a further solution of the present invention: in step five, the temperature for stretching and shaping is 150-160° C., and the winding speed is 4400-4700 m / min.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention uses the circular cross-sectional structure as the core of the hollow triangular cross-sectional structure, which can support the nylon fiber yarn and effectively improve the structural strength of the nylon fiber yarn. At the same time, the hollow triangular cross-sectional structure and the circular cross-sectional structure form a double-layer structure. During cooling, since the circular cross-sectional structure is located inside the hollow triangular cross-sectional structure, the cooling speeds of the hollow triangular cross-sectional structure and the circular cross-sectional structure will be different. The cooling speed of the hollow triangular cross-sectional structure is faster, and the cooling speed of the circular cross-sectional structure is slower, so that the obtained nylon fiber yarn has an irregular bending shape, so that the nylon fiber yarn has good breaking strength and breaking elongation, thereby ensuring that the processed nylon fiber yarn has a good feel and is not easy to pilling.

[0022] The diamond-shaped cross-sectional structure is arranged at the three corners of the hollow triangular cross-sectional structure as a trifoliate structure, forming grooves on the surface of the nylon fiber, which can enhance the "capillary effect" and make the nylon fiber have good adhesion and be bulky and full. At the same time, the inclined surface of the diamond-shaped cross-sectional structure can reflect light and cooperate with the inclined surface of the hollow triangular cross-sectional structure to produce a "flash" effect and present a silk luster. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the cross-sectional structure of the nylon fiber yarn in the present invention.

[0024] Among them: 1. Hollow triangular cross-section structure; 2. Circular cross-section structure; 3. Rhombus cross-section structure. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1 In an embodiment of the present invention, a new fine-denier special-section nylon fiber includes a hollow triangular cross-sectional structure 1, which is the main body of the nylon fiber yarn. A circular cross-sectional structure 2 is arranged inside the hollow triangular cross-sectional structure 1, and diamond cross-sectional structures 3 are arranged at the three vertex positions of the hollow triangular cross-sectional structure 1.

[0027] The circular cross-sectional structure 2 serves as the core of the hollow triangular cross-sectional structure 1, which can support the nylon fiber yarn and effectively improve the structural strength of the nylon fiber yarn. At the same time, the hollow triangular cross-sectional structure 1 and the circular cross-sectional structure 2 form a double-layer structure. During cooling, since the circular cross-sectional structure 2 is located inside the hollow triangular cross-sectional structure 1, the cooling rates of the hollow triangular cross-sectional structure 1 and the circular cross-sectional structure 2 will be different. The cooling rate of the hollow triangular cross-sectional structure 1 is faster, and the cooling rate of the circular cross-sectional structure 2 is slower, so that the obtained nylon fiber yarn has an irregular bend, so that the nylon fiber yarn has good breaking strength and breaking elongation, thereby ensuring that the processed nylon fiber yarn has a good feel and is not easy to pilling.

[0028] The diamond-shaped cross-sectional structure 3 is arranged at the three corners of the hollow triangular cross-sectional structure 1 as a trifoliate structure, forming grooves on the surface of the nylon fiber, which can enhance the "capillary effect" and make the nylon fiber have good adhesion and be bulky and full. At the same time, the inclined surface of the diamond-shaped cross-sectional structure 3 can reflect light and cooperate with the inclined surface of the hollow triangular cross-sectional structure 1 to produce a "flash" effect and present a silk luster.

[0029] Example 1

[0030] See also Figure 1 The production process of the new fine-denier special-section nylon fiber includes the following steps:

[0031] Step 1: Processing a spinning microhole having a combined shape of a hollow triangular cross-sectional structure 1, a circular cross-sectional structure 2 and a diamond cross-sectional structure 3 on a spinneret.

[0032] Step 2: Place the dry nylon fiber slices into a furnace and heat them until they are molten.

[0033] Step 3: Extruding the molten nylon fibers in step 2 through the spinneret micropores to obtain nylon fiber yarns.

[0034] Step 4: The nylon fiber yarn in step 3 is subjected to monomer suction, side blowing cooling and gap blowing in sequence to obtain irregularly curved nylon fiber yarn.

[0035] Step 5: Oiling the nylon fiber yarn in step 4, stretching and shaping it, and then winding it into shape to obtain a finished nylon fiber yarn.

[0036] Example 2

[0037] See also Figure 1 The production process of the new fine-denier special-section nylon fiber includes the following steps:

[0038] Step 1: Processing a spinneret microhole having a hollow triangular cross-sectional structure 1 on the spinneret.

[0039] Step 2: Place the dry nylon fiber slices into a furnace and heat them until they are molten.

[0040] Step 3: Extruding the molten nylon fibers in step 2 through the spinneret micropores to obtain nylon fiber yarns.

[0041] Step 4: The nylon fiber yarn in step 3 is subjected to monomer suction, side blowing cooling and gap blowing in sequence to obtain nylon fiber yarn.

[0042] Step 5: Oiling the nylon fiber yarn in step 4, stretching and shaping it, and then winding it into shape to obtain a finished nylon fiber yarn.

[0043] Example 3

[0044] See also Figure 1 The production process of the new fine-denier special-section nylon fiber includes the following steps:

[0045] Step 1: Processing a spinning microhole having a combined shape of a hollow triangular cross-sectional structure 1 and a circular cross-sectional structure 2 on a spinneret.

[0046] Step 2: Place the dry nylon fiber slices into a furnace and heat them until they are molten.

[0047] Step 3: Extruding the molten nylon fibers in step 2 through the spinneret micropores to obtain nylon fiber yarns.

[0048] Step 4: The nylon fiber yarn in step 3 is subjected to monomer suction, side blowing cooling and gap blowing in sequence to obtain irregularly curved nylon fiber yarn.

[0049] Step 5: Oiling the nylon fiber yarn in step 4, stretching and shaping it, and then winding it into shape to obtain a finished nylon fiber yarn.

[0050] Example 4

[0051] See also Figure 1 The production process of the new fine-denier special-section nylon fiber includes the following steps:

[0052] Step 1: Processing a spinning microhole having a combined shape of a hollow triangular cross-sectional structure 1 and a diamond cross-sectional structure 3 on a spinneret.

[0053] Step 2: Place the dry nylon fiber slices into a furnace and heat them until they are molten.

[0054] Step 3: Extruding the molten nylon fibers in step 2 through the spinneret micropores to obtain nylon fiber yarns.

[0055] Step 4: The nylon fiber yarn in step 3 is subjected to monomer suction, side blowing cooling and gap blowing in sequence to obtain nylon fiber yarn.

[0056] Step 5: Oiling the nylon fiber yarn in step 4, stretching and shaping it, and then winding it into shape to obtain a finished nylon fiber yarn.

[0057] The finished nylon fiber yarns obtained in Example 1, Example 2, Example 3, and Example 4 were tested, and the test results showed that when the circular cross-sectional structure 2 was used as the core of the hollow triangular cross-sectional structure 1, the structural strength of the nylon fiber yarn was effectively improved, and the nylon fiber yarn had good breaking strength and elongation at break.

[0058] The diamond-shaped cross-sectional structure 3 is arranged at the three corners of the hollow triangular cross-sectional structure 1 to form a trifoliate structure, which makes the nylon fiber yarn have good adhesion and is bulky and full. At the same time, the inclined surface of the diamond-shaped cross-sectional structure 3 cooperates with the inclined surface of the hollow triangular cross-sectional structure 1 to produce a "flash" effect and present a silk luster.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. Fine denier special-shaped cross-section nylon fiber, characterized in that: The invention comprises a hollow triangular cross-sectional structure (1), wherein the hollow triangular cross-sectional structure (1) is a main body of nylon fiber yarn, a circular cross-sectional structure (2) is arranged inside the hollow triangular cross-sectional structure (1), and diamond cross-sectional structures (3) are arranged at three vertex positions of the hollow triangular cross-sectional structure (1); The connection points of the hollow triangular cross-sectional structure (1), the circular cross-sectional structure (2) and the rhombus cross-sectional structure (3) are all configured to be arc-shaped; The hollow triangular cross-sectional structure (1) is an equilateral triangle.

2. A production process for the fine denier special-shaped cross-section nylon fiber according to claim 1, characterized in that: The following steps are involved: Step 1: processing a spinning microhole having a combined shape of a hollow triangular cross-sectional structure (1), a circular cross-sectional structure (2) and a diamond cross-sectional structure (3) on a spinning plate; Step 2: Place the nylon fiber dry slices into a furnace and heat them until they are molten; Step 3: Extruding the molten nylon fibers from step 2 through the spinneret micropores to obtain nylon fiber yarns; Step 4: The nylon fiber yarn in step 3 is sequentially subjected to monomer suction, side-blowing cooling, and intermittent blowing to obtain irregularly curved nylon fiber yarn; Step 5: oiling the nylon fiber yarn in step 4, stretching and shaping it, and then winding it into shape to obtain a finished nylon fiber yarn; In steps 2 and 3, the melting and extrusion temperatures are 360-270°C; In step 4, the side-blowing cooling temperature is 20-22°C, the humidity is 65-75%, and the wind speed is 0.62-0.66 m / s; In step 5, the temperature for stretching and setting is 150-160° C., and the winding speed is 4400-4700 m / min.

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