Hollow fiber and yarn

Abstract

The invention relates to a hollow fiber and yarn. The hollow fiber is provided with a square hollow core part and blades, and the outer surface of the core part is square; the number of the blades is eight, and the blades are located at the four corners and the middle positions of the four edges of the square of the outer surface of the core part respectively. The blades protrude outwards along the straight line where the center point of the hollow fiber and the connecting points of the blades and the outer surface of the core part are located. The fiber disclosed by the invention can keep a good hollow rate in the use process, and the thermal insulation and moisture absorption of the fiber can be always kept at a better level.

Description

Technical Field

[0001] This invention relates to the textile field, and in particular to a hollow fiber and yarn. Background Technology

[0002] Hollow fiber refers to chemical fiber with fine tubular cavities along the fiber axis. Compared with traditional non-hollow fiber, the hollow structure can bring properties such as lightweight elasticity, breathability, moisture permeability, and warmth to fabrics.

[0003] Currently, traditional hollow fiber materials cannot maintain good hollowness. During use, the hollow parts are easily flattened, and the original air permeability and moisture permeability of the hollow fiber will be significantly reduced.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] Therefore, it is necessary to provide a hollow fiber and yarn to address the aforementioned technical problems. This invention features eight blades evenly distributed on the outer surface of the hollow fiber, and the hollow portion is square, effectively reducing the problem of the hollow portion being flattened during use, maintaining a good hollow ratio, and because the outer shape of the blades is semi-circular, the fiber has a good hand feel.

[0006] According to a first aspect of the present invention, a hollow fiber is provided, the hollow fiber having a square hollow core and blades, the outer surface of the core being square; the number of blades is eight, respectively located at the four corners and the middle of the four sides of the square outer surface of the core; the blades protrude outward along a straight line from the center point of the hollow fiber to the connection point between the blade and the outer surface of the core.

[0007] In one embodiment of the first aspect of the present invention, the hollow fiber has a hollowness of 40%-90%.

[0008] In one embodiment of the first aspect of the present invention, the cross-section of the blade of the hollow fiber is a combination of rectangle and semicircle, and the end away from the core is semicircular.

[0009] In one embodiment of the first aspect of the present invention, the distance between the outer surface and the inner surface of the square hollow core is equal to the width of the rectangle of the cross-section of the blade.

[0010] In one embodiment of the first aspect of the present invention, the fineness of the fiber is 0.5-20D.

[0011] In one embodiment of the first aspect of the present invention, the material of the fiber includes at least one selected from nylon, polypropylene, and modified polyester.

[0012] In one embodiment of the first aspect of the present invention, the eight blades of the hollow fiber are of the same size.

[0013] In one embodiment of the first aspect of the present invention, the surface of the blade has grooves and / or micropores.

[0014] In a second aspect, the present invention provides a yarn prepared using any of the hollow fibers described above.

[0015] In one embodiment of the second aspect of the present invention, the number of fibers in the yarn is 50-300.

[0016] In a third aspect of the present invention, the method for preparing the hollow fiber described above includes:

[0017] 1) Obtain the spinning raw material; 2) Dry the chips of the spinning raw material; 3) Heat the spinning raw material chips above their melting point, and spin the molten nylon through a spinning machine. The spinning machine uses a special spinneret corresponding to the shape of the hollow fiber. The shape of the special spinneret includes: a square hollow core and eight evenly distributed blades connected to the square hollow core; 4) After being ejected from the spinneret, the hollow fiber is obtained after cooling and stretching.

[0018] The beneficial effects of this invention are:

[0019] 1. Through the cooperation of square hollow core and eight evenly distributed blades, a good hollow ratio can be maintained during the use of the fiber, so that the heat preservation, moisture absorption and other properties of the hollow fiber can be maintained at a good level.

[0020] 2. The blades on the outer surface of the hollow core further enhance the warmth retention and moisture absorption of the hollow fiber. Furthermore, the semi-circular shape of the outer edge of the blades gives the fiber a pleasant hand feel.

[0021] 3. By combining leaf-shaped fibers with hollow fibers, the fibers not only have the large specific surface area of ​​multi-leaf-shaped fibers and the grooves and micropores distributed on the outer surface of the fibers, thus providing good moisture absorption and perspiration wicking functions, but also, with the help of the hollow structure, the fibers can have the excellent properties of hollow fibers such as warmth retention, heat insulation, and lightweight, and also give the fibers a better fluffiness. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the hollow fiber in this invention. Detailed Implementation

[0023] The invention will now be described in more detail. Unless otherwise defined, the terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms used herein shall be interpreted as having the same meaning as they have in the context of this specification and in the relevant field, and shall not be interpreted in an idealized or overly formal sense, unless specifically defined herein.

[0024] Example 1

[0025] Using nylon as raw material, nylon chips are heated to above their melting point, and the molten nylon is spun through a spinning machine. The spinning machine uses a special spinneret that corresponds to the shape of the hollow fiber (eight blades, square hollow). After cooling and stretching, nylon hollow fibers are obtained. After the fibers are made into yarn, the yarn specification is 75D / 24F.

[0026] Example 2

[0027] Polypropylene is used as raw material. Polypropylene chips are heated to above their melting point. The molten polypropylene is then spun through a spinning machine. The spinning machine uses a special spinneret that corresponds to the shape of the hollow fiber (eight blades, square hollow). After cooling and stretching, polypropylene hollow fibers are obtained. The fibers are then made into yarn with a specification of 50D / 36F.

[0028] Example 3

[0029] Using nylon as raw material, nylon chips are heated to above their melting point, and the molten nylon is spun through a spinning machine. The spinning machine uses a special spinneret that corresponds to the shape of the hollow fiber (eight grooved blades, square hollow). After cooling and stretching, nylon hollow fibers are obtained. After the fibers are made into yarn, the yarn specification is 75D / 24F.

[0030] Experiments have verified that the fiber of this invention maintains a good hollow ratio during use, and its warmth retention and moisture absorption properties remain at an optimal level. The grooves on the outer surface of the fiber further provide excellent moisture absorption and perspiration wicking functions.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0032] The embodiments of the present invention have now been described in detail. To avoid obscuring the concept of the invention, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

Claims

1. A hollow fiber, characterized in that, The hollow fiber has a square hollow core and blades. The outer surface of the core is square. There are eight blades, which are located at the four corners and the middle of the four sides of the square outer surface of the core. The blades protrude outward along the straight line between the center point of the hollow fiber and the connection point between the blade and the outer surface of the core.

2. The hollow fiber according to claim 1, characterized in that, The hollow fiber has a hollow content of 40%-90%.

3. The hollow fiber according to claim 1, characterized in that, The cross-section of the hollow fiber blade is a combination of rectangle and semicircle, with the end furthest from the core being semicircular.

4. The hollow fiber according to claim 3, characterized in that, The distance between the outer and inner surfaces of the square hollow core is equal to the width of the rectangular cross-section of the blade.

5. The hollow fiber according to claim 1, characterized in that, The fiber has a fineness of 0.5-20D.

6. The hollow fiber according to claim 1, characterized in that, The fiber is made of at least one of nylon, polypropylene, and modified polyester.

7. The hollow fiber according to claim 1, characterized in that, The surface of the blade has grooves and / or micropores.

8. A yarn, characterized in that, It is prepared from hollow fibers as described in any one of claims 1-8.

9. The yarn according to claim 8, characterized in that, The yarn contains 50-300 fibers.

10. A method for preparing hollow fibers according to any one of claims 1-7, characterized in that, 1) Obtaining spinning raw materials; 2) Dry the chips of the spinning raw material; 3) Heat the raw material chips to above their melting point, and then spin the molten nylon through a spinning machine. The spinning machine uses a special spinneret that corresponds to the shape of the hollow fiber. The special spinneret has the following shape: a square hollow core and eight evenly distributed blades connected to the square hollow core; 4) After being ejected from the spinneret, the fibers are cooled and stretched to obtain hollow fibers.

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