Multi-hollow down-like fiber spinneret plate

Abstract

The utility model relates to a multi-hollow down-like fiber spinneret plate, which belongs to the field of chemical fiber production accessories and comprises a spinneret plate body, the spinneret plate body is provided with a spinneret orifice consisting of an upper feed port, a middle material passing channel and a lower discharge port, and the spinneret orifice penetrates through the upper surface and the lower surface of the spinneret plate body. Each discharging hole comprises five V-shaped holes and five I-shaped holes; the V-shaped holes are formed in the V-shaped holes; the five V-shaped holes are uniformly distributed according to the circumference, and the tips of the five V-shaped holes face one side far away from the axis of the discharge hole to form a five-pointed star arrangement; and the five I-shaped holes are uniformly distributed along the circumference and are respectively arranged between the adjacent V-shaped holes. When the spinneret plate is used for producing fibers, a large hollow part is formed among the five V-shaped holes which are distributed in a five-pointed star shape, small hollow parts are also formed between each I-shaped hole and two adjacent V-shaped holes, each monofilament is provided with 11 hollow parts, the degree of hollowness is greatly improved, the heat preservation effect is better, and meanwhile, the fibers are easy to rebound and good in elasticity after being pressed.

Description

Technical Field

[0001] The utility model belongs to the field of chemical fiber production accessories, in particular to a multi-hollow down-like fiber spinneret. Background Art

[0002] Spinnerets are commonly used products in the textile and chemical fiber industry. The function of the spinneret is to transform the viscous polymer melt or solution into a thin stream with a specific cross-section through micropores, and solidify it through a coagulation medium such as air or a coagulation bath to form a filament, that is, it enters from the feed hole and exits from the discharge hole.

[0003] The discharge opening on an ordinary spinneret is circular, and a non-circular one is called a special-shaped spinneret. The discharge openings of existing special-shaped spinnerets have different shapes, and the properties of fiber filaments with various cross-sections are also different.

[0004] In recent years, the scarcity of natural down raw materials has led to the high price of down jackets. Therefore, the production of imitation down fibers is very necessary. The reason why natural down has a warming effect is that it is composed of feathers and down. The former has hollow feather poles, while the latter does not. The two intertwine to form irregular spaces, which can trap air and reduce heat loss. Therefore, forming a hollow space is the key to the production of imitation down fibers.

[0005] There are many types of hollow fiber spinnerets at present, such as a pentagonal hollow fiber spinneret disclosed in a Chinese patent with authorization announcement number CN204661870U. The pentagonal hollow fiber spinneret consists of a spinneret body and a spinneret hole. The spinneret body is circular, and the spinneret body is provided with 4 to 8 circles of spinnerets distributed in concentric circles from the inside to the outside; the spinneret hole is composed of five units, each unit is a hollow "V" slit with an angle of 36 degrees on both sides or an inverted "V" slit with an angle of 108 degrees on both sides, and there is a gap between the two adjacent "V" slits with an angle of 36 degrees on both sides or an inverted "V" slit with an angle of 108 degrees on both sides, and they are not connected to each other. In the fiber produced by the spinneret, each fiber can only produce one hollow fiber. Although its thermal insulation performance has been improved, it still has a large gap in thermal insulation effect compared with natural down. Utility Model Content

[0006] The utility model aims to provide a multi-hollow down-like fiber spinneret to solve the problem that the thermal insulation effect of the existing down-like fiber is still far behind that of natural down.

[0007] In order to achieve the purpose, the technical solution provided by the utility model is:

[0008] The utility model relates to a multi-hollow down-like fiber spinneret, comprising a spinneret body, on which a spinneret hole consisting of an upper feed port, a middle material passage channel and a lower discharge port is arranged, the spinneret hole passes through the upper and lower surfaces of the spinneret body, and each of the discharge ports comprises five V-shaped holes and five I-shaped holes; the five V-shaped holes are evenly arranged according to the circumference, and the tips are all directed to a side away from the axis of the discharge port, forming a five-pointed star arrangement; the five I-shaped holes are evenly distributed according to the circumference, and are respectively arranged between adjacent V-shaped holes.

[0009] Preferably, the I-shaped hole includes a short arc portion, a long arc portion and a connecting portion, the short arc portion is connected to the inner end of the connecting portion, the long arc portion is connected to the outer end of the connecting portion, the short arc portion is bent toward the inner side of the connecting portion, and the long arc portion is bent toward the outer side of the connecting portion.

[0010] Preferably, the V-shaped hole and the I-shaped hole are both symmetrical structures, and the symmetry axes of the V-shaped hole and the I-shaped hole coincide with the radius of the discharge port cross section.

[0011] Preferably, the symmetry axis of each I-shaped hole has the same angle as the symmetry axes of two adjacent V-shaped holes.

[0012] Preferably, the spinneret holes are evenly arranged on the spinneret plate body along a circumference, and the number of the spinneret holes is 8-12.

[0013] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0014] The discharge port of the spinneret of the multi-hollow down-like fiber spinneret involved in the utility model comprises five V-shaped holes and five I-shaped holes; the five V-shaped holes are evenly arranged according to the circumference, and the tips are all facing the side away from the axis of the discharge port, forming a five-pointed star arrangement; the five I-shaped holes are evenly distributed according to the circumference, and are respectively arranged between adjacent V-shaped holes. When the spinneret is used to produce fibers, a large hollow is formed between the five V-shaped holes arranged in the five-pointed star, and a small hollow is also formed between each I-shaped hole and its two adjacent V-shaped holes, totaling 10 small hollows, which greatly improves the hollowness of the fiber. The multi-hollow fiber can accommodate more air, and the fiber surface area is very large, which greatly increases the resistance to air circulation, so that the accommodated air is statically fixed in the hollow fiber, so that it has a good warming effect; at the same time, the multi-hollow fiber has a large hollowness, has a rebound effect when pressed by external force, and has a good fluffiness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the multi-hollow down-like fiber spinneret involved in the utility model;

[0016] Figure 2It is an axial cross-sectional view of a single spinneret hole of a multi-hollow down-like fiber spinneret;

[0017] Figure 3 It is a hole pattern diagram of the discharge port of the spinneret holes of the multi-hollow down-like fiber spinneret;

[0018] Figure 4 It is a schematic cross-sectional view of the monofilament ejected from each spinneret.

[0019] Icon description: 1-spinneret body, 2-spinneret hole, 21-feed port, 22-feed channel, 23-discharge port, 24-V-shaped hole, 25-I-shaped hole, 251-short arc portion, 252-long arc portion, 253-connecting portion, 3-monofilament, 31-large hollow, 32-small hollow. DETAILED DESCRIPTION

[0020] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0021] See attached Figure 1 and 2 As shown, the utility model relates to a multi-hollow down-like fiber spinneret, comprising a spinneret body 1, on which a spinneret hole 2 consisting of an upper feed port 21, a middle feed passage 22 and a lower discharge port 23 is provided, and the spinneret hole 2 passes through the upper and lower surfaces of the spinneret body 1. The spinneret holes 2 are evenly arranged on the spinneret body 1 according to the circumference. In order to prevent the fibers from sticking together for a long time, it is best to use short fibers for down-like fibers, and the number of the spinneret holes 2 should be small, generally 8-12.

[0022] See attached Figure 3 As shown, each of the discharge ports 23 includes five V-shaped holes 24 and five I-shaped holes 25. The V-shaped holes 24 and the I-shaped holes 25 are symmetrical structures, and the symmetry axes of the V-shaped holes 24 and the I-shaped holes 25 coincide with the radius of the cross section of the discharge port 23. The symmetry axis of each I-shaped hole 25 has the same angle as the symmetry axes of the two adjacent V-shaped holes 24. The five V-shaped holes 24 are evenly distributed along the circumference, and their tips are all facing the side away from the axis of the discharge port 23, forming a five-pointed star arrangement; the five I-shaped holes 25 are evenly distributed along the circumference, and are respectively arranged between adjacent V-shaped holes 24; the I-shaped hole 25 includes a short arc portion 251, a long arc portion 252 and a connecting portion 253, the short arc portion 251 is connected to the inner end of the connecting portion 253, the long arc portion 252 is connected to the outer end of the connecting portion 253, the short arc portion 251 is bent toward the inner side of the connecting portion 253, and the long arc portion 252 is bent toward the outer side of the connecting portion 253.

[0023] When the spinneret is used to produce fibers, the cross section of each single filament 3 of the fiber is as follows: Figure 4 As shown, a large hollow 31 is formed between the five V-shaped holes 24 arranged in a five-pointed star pattern, and a small hollow 32 is formed between each I-shaped hole 25 and its two adjacent V-shaped holes 24, for a total of 10 small hollows 32. Each monofilament 3 has 11 hollows, which greatly improves the hollowness, locks in heat, and has a better insulation effect. Of course, due to the expansion of the material when the fiber raw material is ejected from the spinneret, the cross-section of each monofilament's small hollow 32 may be slightly different, and the cross-sections of the large hollow 31 and small hollow 32 of different monofilaments may also be different. Figure 4 The existence of the large hollow space 31 and the small hollow space 32 is merely shown, and the shapes of the large hollow space 31 and the small hollow space 32 are not limited.

[0024] The above is a detailed description of the utility model in combination with the embodiments, but the contents described are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A multi-hollow down-like fiber spinneret, comprising a spinneret body, on which a spinneret hole consisting of an upper feed port, a middle feed passage and a lower discharge port is arranged, the spinneret hole passing through the upper and lower surfaces of the spinneret body, characterized in that: Each of the discharge ports includes five V-shaped holes and five I-shaped holes; the five V-shaped holes are evenly arranged along the circumference, and the tips are all facing the side away from the axis of the discharge port, forming a five-pointed star arrangement; the five I-shaped holes are evenly distributed along the circumference, and are respectively arranged between adjacent V-shaped holes.

2. The multi-hollow down-like fiber spinneret according to claim 1, characterized in that: The I-shaped hole includes a short arc portion, a long arc portion and a connecting portion, the short arc portion is connected to the inner end of the connecting portion, the long arc portion is connected to the outer end of the connecting portion, the short arc portion is bent toward the inner side of the connecting portion, and the long arc portion is bent toward the outer side of the connecting portion.

3. The multi-hollow down-like fiber spinneret according to claim 1, characterized in that: The V-shaped hole and the I-shaped hole are both symmetrical structures, and the symmetry axes of the V-shaped hole and the I-shaped hole coincide with the radius of the discharge port cross section.

4. The multi-hollow down-like fiber spinneret according to claim 3, characterized in that: The symmetry axis of each I-shaped hole has the same angle as the symmetry axes of the two adjacent V-shaped holes.

5. The multi-hollow down-like fiber spinneret according to claim 1, characterized in that: The spinneret holes are evenly arranged on the spinneret plate body according to the circumference, and the number of the spinneret holes is 8-12.

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