CN-122013336-A - Special-shaped section fiber and preparation method thereof

CN122013336ACN 122013336 ACN122013336 ACN 122013336ACN-122013336-A

Abstract

The invention relates to a special-shaped cross-section fiber and a preparation method thereof. The cross section of the special-shaped cross section fiber is provided with a reference structure which is distributed in a triangle shape, the cross section is provided with three corners, a pair of bulges are arranged at the positions of each corner, two bulges positioned at the same corner are directly connected with each other to form a Y-shaped groove at the vertex of the corner, two bulge areas positioned at different corners and adjacent to each other are connected with each other through continuous straight line contours or curve contours, and the straight line contours or the curve contours form three boundary contours of the triangle-shaped distribution reference structure. The special-shaped cross-section fiber has the advantages that the conductivity of liquid on the surface of the fiber is improved while the higher glossiness is kept.

Inventors

FENG PEI
XU XINKANG
XU QIANCHUN
WANG JIAZHENG
HE SHIQUN
YU HONGZHOU
CHEN ABIN
JIANG XIUMING
YANG CHONGCHANG

Assignees

东华大学
福建百宏聚纤科技实业有限公司
上海羿展仪器有限公司

Dates

Publication Date: 20260512
Application Date: 20260407

Claims (10)

1. A special-shaped section fiber is characterized in that, The fibers are formed from a polymer; The cross section of the fiber is provided with a reference structure distributed in a triangle shape; The reference structure has three corners; a pair of protrusions are arranged at each corner; Two bulges positioned at the same corner are directly connected with each other to form a Y-shaped groove at the vertex of the corner; Two mutually adjacent convex areas positioned at different corner positions are mutually connected through a continuous straight line profile or a curve profile; the straight line profile or the curve profile constitutes three boundary profiles of the triangular distributed reference structure.
2. The profiled cross section fiber of claim 1, wherein, A pair of protrusions at the same corner are symmetrically distributed about an angular bisector of the corner.
3. The profiled cross section fiber as claimed in any one of claims 1 to 2, characterized in that, The triangular distributed reference structures are internally provided with hollow cavities.
4. The profiled cross section fiber of claim 3, The hollow degree of the fiber is 1% -30%.
5. The profiled cross section fiber of claim 3, The hollow cavity is triangular in cross section of the fiber.
6. The profiled cross section fiber of claim 1, wherein, The diameter of the circumcircle of the reference structure Diameter of inscribed circle Diameter of the circumcircle The ratio is as follows: 45% %; The ratio of the distance OA from the center of gravity O of the cross section to the front end A of the protrusion to the distance OB from the center of gravity O to the bottom B of the Y-shaped groove is between 1.05 and 2; Width of the narrowest part of the main arm of the corner Maximum width of Y-shaped groove at end Ratio of 0.8 To 2.2 percent; an included angle theta between a pair of protrusions forming the Y-shaped groove ranges from 30 degrees to 120 degrees; The single filament fineness is 0.8-5.6dtex.
7. A process for producing a fiber having a profiled cross section as defined in any one of claims 1 to 6, Step one, placing a fiber raw material into a dryer to finish pre-crystallization and drying treatment; Secondly, carrying out melt spinning on the obtained fiber raw material, and extruding the fiber raw material through a spinneret plate to form primary fibers; step three, after the nascent fiber is extruded from the spinneret plate, the nascent fiber enters a blowing cooling area for cooling; And fourthly, oiling, winding and drafting to obtain the finished fiber.
8. The method for producing a fiber having a special-shaped cross section according to claim 7, The entering the blowing cooling area for cooling comprises the following steps: a first section of air blowing, a second section of air blowing, The second section of blowing area is positioned below the first section of blowing, The blowing wind pressure and the blowing temperature of the second section of blowing are smaller than those of the first section of blowing.
9. The method for producing a profiled-section fiber according to claim 8, characterized in that, The first section of air blowing is performed in a circular air blowing mode; the second section of blowing is in the same direction.
10. A textile comprising the profiled cross section fiber of any one of claims 1-6.

Description

Special-shaped section fiber and preparation method thereof Technical Field The invention relates to the technical field of textile fiber preparation, in particular to a special-shaped cross-section fiber and a preparation method thereof. Background In the prior art, the conventional synthetic fiber mostly adopts a cross-section structure similar to a circular shape due to the limitations of a spinning process and a forming structure. The fiber has certain advantages in the aspects of processing stability and production efficiency, but has limitations in the aspects of gloss presentation and liquid conductivity, and is difficult to simultaneously consider good appearance texture and wearing comfort. The natural silk product has obvious and soft luster effect in light reflection due to the special fiber section structure, and has better wearability. However, silk raw materials have high cost and limited sources, and are difficult to meet the requirements of large-scale application. Accordingly, the development of synthetic fibers having both the appearance-closing effect and the wearing comfort has become a concern in the art. Disclosure of Invention In order to solve the technical problems, the invention provides a special-shaped cross-section fiber and a preparation method thereof. Through reasonable design of the fiber cross-section structure, the fiber is optimized in the aspects of light reflection paths and surface structure characteristics, and the better gloss effect is obtained, meanwhile, the conductivity of liquid on the surface of the fiber is considered, so that the moisture absorption and sweat release performances of the fiber are improved, and the wearing comfort of the fiber is improved. According to a first aspect of the invention, there is provided a profiled cross-section fibre, wherein the fibre is formed from a polymer, the cross-section of the fibre has a triangular distributed reference structure having three corners, each corner being provided with a pair of protrusions, two protrusions at the same corner being directly connected to each other to form a vertex Y-shaped recess of the corner, two protrusion areas at different corners and adjacent to each other being connected to each other by a continuous rectilinear or curvilinear profile, the rectilinear or curvilinear profile constituting three boundary profiles of the triangular distributed reference structure. In some embodiments, a pair of protrusions located at the same corner are symmetrically distributed about the angular bisector of the corner. In some embodiments, the triangular distributed reference structures form a hollow cavity inside; in some embodiments, the fiber has a hollow of 1% -30%. In some embodiments, the hollow cavity is triangular in cross-section of the fiber. In some embodiments, the reference structure has a circumscribed circle diameterDiameter of inscribed circleDiameter of the circumcircleThe ratio is as follows: 45%%; The ratio of the distance OA from the center of gravity O of the cross section to the front end A of the protrusion to the distance OB from the center of gravity O to the bottom B of the Y-shaped groove is between 1.05 and 2; Width of the narrowest part of the main arm of the corner Maximum width of Y-shaped groove at endRatio of0.8 To 2.2 percent; an included angle theta between a pair of protrusions forming the Y-shaped groove ranges from 30 degrees to 120 degrees; The single filament fineness is 0.8-5.6dtex. According to a second aspect of the invention, a preparation method of the special-shaped cross-section fiber is provided, which comprises the steps of firstly placing a fiber raw material in a dryer to finish pre-crystallization and drying treatment, secondly, carrying out melt spinning on the obtained fiber raw material, extruding the obtained fiber raw material through a spinneret plate to form a primary fiber, thirdly, cooling the primary fiber after extruding the primary fiber from the spinneret plate in a blowing cooling area, and fourthly, oiling, winding and drafting to obtain a finished fiber. In some embodiments, the cooling by entering the air-blowing cooling area comprises a first-section air-blowing and a second-section air-blowing, wherein the second-section air-blowing area is positioned below the first-section air-blowing, and the air-blowing wind pressure and the air-blowing temperature of the second-section air-blowing are smaller than those of the first-section air-blowing. In some embodiments, the first section of air is blown in a circular manner, and the second section of air is blown in a smooth manner. According to a third aspect of the present invention there is provided a textile product using profiled-section fibres as defined in any one of the preceding claims. Compared with the prior art, the invention has at least the following beneficial effects: 1. The reference structures distributed in a triangular mode are introduced into the cross sections of the