Hollow fiber for fabrics

Abstract

The utility model provides a hollow fiber for fabrics, which relates to the field of fiber production and comprises a strip-shaped fiber body. A spiral hole is formed in the fiber body; the spiral holes are formed in the extending direction of the fiber body; the section of the fiber body is perpendicular to the strip-shaped extension direction, and the section of the spiral hole is strip-shaped; the strip-shaped section of the spiral hole is provided with a long axis and a short axis; the long axis of the strip-shaped cross section of the spiral hole always penetrates through the extending middle axis of the fiber body; the long axes of the strip-shaped sections of the spiral holes deflect relative to the long axes of the strip-shaped sections at the adjacent continuous sections of the spiral holes in the extending direction of the fiber body. According to the hollow fiber for the fabric, the problem that use is affected due to excessive deformation of the hollow fiber in the prior art is solved, and the compressive strength of the hollow fiber can be improved.

Description

Technical Field

[0001] The utility model relates to the field of fiber production, in particular to hollow fibers used for fabrics. Background Art

[0002] Spinneret is a commonly used product in the textile and chemical fiber industry. The spinneret includes a feed surface and a discharge surface. The feed surface is provided with a feed hole, and the discharge surface is provided with a discharge hole. The function of the spinneret is to transform the viscous polymer melt or solution into a thin stream with a specific cross-section through the 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 through the discharge hole.

[0003] Hollow fibers are fibers with a cavity or tubular structure. Such fibers have the characteristics of thin walls, large outer diameters, and large internal spaces. Due to the holes inside the fibers, the fabric is light and breathable. The hollow structure inside the fibers facilitates air circulation, making the fabric easier to dry. After being made into clothing, the easy-to-dry hollow fibers facilitate the discharge and circulation of sweat.

[0004] In the prior art, there is a spinneret and method for preparing mesophase asphalt-based hollow carbon fibers disclosed in Chinese patent application No. 201310222714.2, which discloses a hollow fiber structure and a spinneret for producing the hollow fibers. However, the existing hollow fibers are easily flattened by a unidirectional extrusion force, because when the hollow fibers are laid flat on a plane, they are subjected to a surface pressure parallel to the flat plane, such as when ironing clothes made of hollow fibers with an iron, the hollow structure of the hollow fibers will be squeezed by the horizontal plane, thereby affecting the appearance of the hollow fibers. The appearance of the hollow fibers becomes flattened due to the mutual contact of the hollow inner walls. After the hollow shape of the flattened hollow fibers changes, the exhaust and perspiration effect of the hollow fibers will be affected, thereby affecting the use of the hollow fibers. Utility Model Content

[0005] In view of the above technical problems, the hollow fiber for fabric provided by the utility model can improve the compressive strength of the hollow fiber and reduce the occurrence of the situation where the outer shape of the hollow fiber becomes flat due to the difficulty in recovering from the transitional deformation of the hollow inner wall.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a hollow fiber for fabric, comprising a strip-shaped fiber body; a spiral hole is provided on the fiber body; the spiral hole is provided along the extension direction of the fiber body; at a cross section of the fiber body perpendicular to the strip extension direction, the spiral hole is strip-shaped at the cross section; the strip-shaped cross section of the spiral hole has a major axis and a minor axis; the major axis of the strip-shaped cross section of the spiral hole always passes through the extended middle axis of the fiber body; at adjacent continuous cross sections of the spiral hole along the extension direction of the fiber body, the major axis of the strip-shaped cross section of the spiral hole is deflected compared with the major axis of the strip-shaped cross section at the adjacent cross section.

[0008] The hollow fiber for fabric provided by the utility model is preferably such that at the cross section of the fiber body perpendicular to the strip extension direction, the spiral hole is rectangular in the cross section; the midlines of the two long sides of the rectangular cross section of the spiral hole are the major axis; and the midlines of the two wide sides of the rectangular cross section of the spiral hole are the minor axis.

[0009] The hollow fiber for fabric provided by the utility model is preferably such that when the extension direction of the fiber body is a straight line, on adjacent cross sections along the extension direction of the fiber body, when the long axes of all the spiral holes are projected onto a common projection parallel to the cross section, the angles between the long axes of the spiral holes in adjacent cross sections are constant.

[0010] The above technical solution has the following advantages or beneficial effects:

[0011] The utility model provides a hollow fiber for fabric, which relates to the field of fiber production, including a strip-shaped fiber body; a spiral hole is provided on the fiber body; the spiral hole is provided along the extension direction of the fiber body; the spiral hole is strip-shaped at the section of the fiber body perpendicular to the strip extension direction; the strip section of the spiral hole has a major axis and a minor axis; the major axis of the strip section of the spiral hole always passes through the extension center axis of the fiber body; at the adjacent continuous sections of the spiral hole along the extension direction of the fiber body, the major axis of the strip section of the spiral hole is deflected compared with the major axis of the strip section at the adjacent section. The hollow fiber for fabric provided by the utility model solves the problem of excessive deformation of hollow fibers affecting use in the prior art, and can improve the compressive strength of the hollow fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, but the emphasis is on illustrating the subject matter of the present invention.

[0013] Figure 1It is a perspective structural schematic diagram of the hollow fiber for fabric provided in Example 1 of the utility model.

[0014] Figure 2 It is a schematic structural diagram of a spinneret for producing hollow fibers for fabrics provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should be noted that the terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application.

[0016] The technical solutions in the embodiments of the present invention are described below in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the protection scope of the present invention.

[0017] Embodiment 1:

[0018] The hollow structure in the hollow fiber in the prior art is usually a hole opened along the extension direction of the fiber. In order to improve the structural strength of the hollow fiber and reduce the occurrence of the situation where the inner walls of the hole are close to each other due to the extrusion of the hollow fiber in various directions, it is usually necessary to reduce the size of the hole so that when the fiber is compressed, the fiber has more structure to support the pressure, thereby reducing the deformation of the hollow fiber. When the fiber is under pressure, the more structural parts of the fiber along the pressure line and the fewer hole parts of the fiber along the pressure line, the less likely the hollow fiber is to deform. In order to balance the fiber when it is subjected to pressure in different directions, the fiber can have the smallest deformation. Therefore, the prior art usually sets the hole as a circular hole so that the fiber has a hollow structure as large as possible. The hollow fiber for fabric provided in Example 1 of the utility model is as follows: Figures 1 to 2 As shown, it includes a strip-shaped fiber body 1; a spiral hole 2 is opened on the fiber body; the spiral hole 2 is opened along the extension direction of the fiber body 1; at the section of the fiber body 1 perpendicular to the strip extension direction, the spiral hole 2 is strip-shaped in section; the strip section 21 of the spiral hole 2 has a major axis and a minor axis; the major axis of the strip section 21 of the spiral hole 2 always passes through the extension center axis of the fiber body 1; at adjacent continuous sections of the spiral hole 2 along the extension direction of the fiber body 1, the major axis of the strip section 21 of the spiral hole 2 is deflected compared with the major axis of the strip section 21 at the adjacent section.

[0019] When the hollow fiber for fabric provided in Example 1 of the utility model is subjected to horizontal pressure, compared with the circular hole with the same area as the strip cross-section 21 of the spiral hole 2, the short axis length of the strip cross-section 21 is smaller than the diameter length of the circular hole. Therefore, when the fiber is subjected to the extrusion force along the short axis, the deformation of the fiber body 1 will be smaller than the deformation of the fiber with the circular hole. Although the long axis length of the strip cross-section 21 is larger than the diameter length of the circular hole, after the strip cross-section 21 of the fiber body 1 is deformed at the short axis, the structural parts of the fiber body 1 at the short axis will first stick to each other. When the external pressure continues to be applied to the fiber, the fiber body 1 When the structures at the short axis are pressed against each other, a reaction force can be generated to offset the external pressure, thereby avoiding deformation of the long axis portion of the strip fiber of the spiral hole 2; and the hollow fiber provided in this embodiment has a short axis that is exactly consistent with the pressure direction under the linear pressure in any external direction, so when the fiber body 1 is subjected to external pressure, the deformation size is the length of the short axis of the adjustment section 21; therefore, the hollow fiber provided in this embodiment can have a smaller deformation than directly setting a circular hole, and a smaller deformation degree is easier to recover when the external pressure is cancelled, thereby avoiding the situation where the use of the hollow fiber is affected by excessive deformation of the hollow fiber.

[0020] The hollow fiber for fabric provided in Example 1 of the utility model solves the problem in the prior art that excessive deformation of the hollow fiber affects the use, and can improve the compressive strength of the hollow fiber.

[0021] As a preferred solution, in this embodiment, at the section of the fiber body 1 perpendicular to the strip extension direction, the spiral hole 2 is rectangular in section; the midlines of the two long sides of the rectangular section of the spiral hole 2 are the major axis; and the midlines of the two wide sides of the rectangular section of the spiral hole 2 are the minor axis. The strip cross-section of the spiral hole 2 is a rectangular cross-section, and the long axis of the rectangle always passes through the central axis of the fiber body 1 (the fiber body 1 is a cylindrical strip, and the central axis of the fiber body 1 is the cylindrical axis); on the plane perpendicular to the central axis of the fiber body 1, the cross-section of the spiral hole 2 is a rectangle. Compared with a circle of the same area, the width of the rectangle is smaller than the diameter of the circle. When the fiber body 1 is subjected to a unidirectional surface pressure (the pressure direction is perpendicular to the extension direction of the fiber body 1), the spiral hole 2 will always have a rectangular short axis in the same direction as this pressure. At the rectangular short axis, after the long sides on both sides of the rectangular short axis are in contact with each other, the fiber body 1 will stop deforming. At this time, although the diagonal length of the rectangle must be longer than the diameter of the circle, the fiber body 1 at the diagonal will no longer continue to move closer due to the gap in the middle, and the structural parts of the fiber body 1 at the short axis are already in contact with each other.

[0022] In this embodiment, when the extension direction of the fiber body 1 is a straight line, on adjacent cross sections along the extension direction of the fiber body 1, when the long axes of all the spiral holes 2 are on the common projection parallel to the cross section, the angle between the long axes of the spiral holes 2 of the adjacent cross sections is a constant value. Adjacent cross sections are two adjacent cross sections in the equidistant cross sections perpendicular to the extension direction of the fiber body 1. The cross sections of the spiral holes 2 at the adjacent cross sections are all rectangular, and there is an angle between the long axes of the rectangles. This means that when the fiber body 1 is subjected to pressure at different extension sections, the angle between the pressure and the extension direction of the long axis is different, and the angle between the long axes of the spiral holes 2 of the adjacent cross sections is a constant value. This is to make the short axes consistent with the pressure direction evenly distributed, so that the short axes can be evenly distributed in the extension direction of the fiber body 1, so that the fiber body can better pass through the deformation of the short axes arranged at each equidistant arrangement, so that the structures at the short axes of the fiber body 1 are close to each other to form a stable reaction force for resisting the pressure, and avoid the remaining parts of the spiral holes 2 longer than the short axes from being squeezed and deformed more.

[0023] In order to specifically produce the hollow fibers for fabrics in this embodiment, it is necessary to improve the existing spinneret. Since the production of special-shaped hollow fibers belongs to the existing technology, it is only necessary to make the spinneret have a structure that can rotate relative to the spinning box, and the spinneret holes of the hollow fibers are arranged on this rotating structure, so that hollow fibers with spiral holes 2 can be produced. In this embodiment, the spinneret 3 includes a fixed plate 31 and a rotating plate 32; the rotating plate 32 can be rotatably fixed on the fixed plate 31; a spinneret hole 4 is opened on the rotating plate 32; the spinneret hole 4 is cylindrical; a rectangular blocking block 5 connected to the rotating plate is arranged in the middle of the spinneret hole 4; the axis of the spinneret hole 4 is coaxial with the rotation axis of the rotating plate 32 relative to the fixed plate 31. The fixed plate 31 is fixed on the spinning manifold. After the fiber melt passes through the spinneret hole 4 on the rotating plate 32, the fiber body with rectangular holes flows out due to the obstruction of the blocking block 5. By rotating the rotating plate 32 at a constant speed relative to the fixed plate 31, the rectangular holes of the fiber body 1 can change their opening direction at a constant speed, thereby realizing the spiral holes 2 in the fiber body 1. How the rotating plate 32 can be rotatably fixed compared to the fixed plate seal belongs to the prior art and will not be elaborated here.

[0024] In summary, the utility model provides a hollow fiber for fabric, which relates to the field of fiber production, including a strip-shaped fiber body; a spiral hole is provided on the fiber body; the spiral hole is provided along the extension direction of the fiber body; the spiral hole is strip-shaped at the section of the fiber body perpendicular to the strip extension direction; the strip section of the spiral hole has a major axis and a minor axis; the major axis of the strip section of the spiral hole always passes through the extended middle axis of the fiber body; at the adjacent continuous sections of the spiral hole along the extension direction of the fiber body, the major axis of the strip section of the spiral hole is deflected compared to the major axis of the strip section at the adjacent section. The hollow fiber for fabric provided by the utility model solves the problem of excessive deformation of hollow fibers affecting use in the prior art, and can improve the compressive strength of hollow fibers.

[0025] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A hollow fiber for fabric, characterized in that: It comprises a strip-shaped fiber body; the fiber body is provided with a spiral hole; the spiral hole is provided along the extension direction of the fiber body; At a cross section of the fiber body perpendicular to the strip extension direction, the spiral hole is strip-shaped at the cross section; the strip-shaped cross section of the spiral hole has a major axis and a minor axis; The long axis of the strip cross section of the spiral hole always passes through the extended middle axis of the fiber body; at adjacent continuous cross sections of the spiral hole along the extension direction of the fiber body, the long axis of the strip cross section of the spiral hole is deflected compared to the long axis of the strip cross section at the adjacent cross section.

2. The hollow fiber for fabric according to claim 1, characterized in that: At the cross section of the fiber body perpendicular to the strip extension direction, the spiral hole is rectangular in the cross section; the midlines of the two long sides of the rectangular cross section of the spiral hole are the major axis; and the midlines of the two wide sides of the rectangular cross section of the spiral hole are the minor axis.

3. The hollow fiber for fabric according to claim 2, characterized in that: When the extension direction of the fiber body is a straight line, on adjacent sections along the extension direction of the fiber body, when the long axes of all the spiral holes are projected onto a common projection parallel to the section, the angles between the long axes of the spiral holes on adjacent sections are constant.

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