FIBER FOR MEDICAL ANTIBACTERIAL FABRIC AND PREPARATION METHOD THEREFOR

Abstract

A preparation method of fibers for medical antibacterial fabric includes cooling an antibacterial polyester melt by ring-blowing after extruded from a trilobal spinneret hole on a spinneret, and manufacturing a fully drawn yarn (FDY), then performing a relaxation heat treatment to obtain the fiber. The shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein all the trilobal spinneret holes are distributed in concentric circles, and the direction of the shortest leaf in each trilobal spinneret hole is randomly distributed. The prepared fiber has a three-dimensional crimp shape and includes antibacterial polyester monofilaments with trilobal cross-section. The fiber has mechanical performance indices as a crimp shrinkage of 26-29%, a crimp stability of 78-82%, a shrinkage elongation of 55-62%, a crimp elastic recovery rate of 70-75%, a breaking strength of 2.4-2.6 cN/dtex, an elongation at break of 55.0±5.0%, and a monofilament fineness of 1.00-1.50 dtex.

Claims

1. A method for preparing a fiber for a medical antibacterial fabric, comprising: cooling an antibacterial polyester melt by ring-blowing after extruded from a trilobal spinneret hole on a spinneret, and manufacturing a fully drawn yarn (FDY) according to an FDY process, then performing a relaxation heat treatment to obtain the fiber for the medical antibacterial fabric; wherein a ratio of lengths of three leaves from a same trilobal spinneret hole is 1.0:(1.5-2.5):(1.5-2.5), while widths of the three leaves are same, wherein a ratio of a length to a width of a shortest leaf is (2.5-3.5):1, and an angle between center lines of two adjacent leaves is 120; wherein shapes and sizes of three leaves from different trilobal spinneret holes are same; wherein all the trilobal spinneret holes are distributed in concentric circles, and a direction of the shortest leaf in each trilobal spinneret hole is randomly distributed; wherein the ring-blowing cooling has a cooling temperature of 20-25° C. and a cooling wind speed of 1.80-2.30 m/s; wherein the fiber for the medical antibacterial fabric has a three-dimensional crimp shape, and in a bundle of filaments, crimp directions of monofilaments are inconsistent.

2. The method of claim 1, wherein the antibacterial polyester melt has an intrinsic viscosity of 0.50-0.55 dL/g.

3. The method of claim 2, wherein the antibacterial polyester melt mainly consists of a polyester and an antibacterial agent dispersed in the polyester, wherein the antibacterial agent is a silver-based antibacterial agent with a content of 100-300 ppm of silver ions.

4. The method of claim 3, wherein the FDY process involves technological parameters: a spinning temperature of 270-280° C., a first godet roller speed of 1800-2000 m/min, a first godet roller temperature of 85-95° C., a second godet roller speed of 2700-2900 m/min, a second godet roller temperature of 150-170° C., and a winding speed of 2640-2830 m/min.

5. The method of claim 1, wherein the relaxation heat treatment has a temperature of 90-120° C. and a time of 20-30 min.

6. A fiber for a medical antibacterial fabric prepared by the method of claim 1, wherein the fiber for the medical antibacterial fabric has the three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section.

7. The fiber for the medical antibacterial fabric of claim 6, wherein the fiber for the medical antibacterial fabric comprises mechanical performance indices: a crimp shrinkage of 26-29%, a crimp stability of 78-82%, a shrinkage elongation of 55-62%, and a crimp elastic recovery rate of 70-75%.

8. The fiber for the medical antibacterial fabric of claim 6, wherein the fiber for the medical antibacterial fabric comprises mechanical performance indices: a breaking strength of 2.4-2.6 cN/dtex, an elongation at break of 55.0±5.0%, and a monofilament fineness of 1.00-1.50 dtex.

9. The fiber for the medical antibacterial fabric of claim 6, wherein during a preparation of the fiber, the antibacterial polyester melt has an intrinsic viscosity of 0.50-0.55 dL/g.

10. The fiber for the medical antibacterial fabric of claim 9, wherein during the preparation of the fiber, the antibacterial polyester melt mainly consists of a polyester and an antibacterial agent dispersed in the polyester, wherein the antibacterial agent is a silver-based antibacterial agent with a content of 100-300 ppm of silver ions.

11. The fiber for the medical antibacterial fabric of claim 10, wherein during the preparation of the fiber, the FDY process involves technological parameters: a spinning temperature of 270-280° C., a first godet roller speed of 1800-2000 m/min, a first godet roller temperature of 85-95° C., a second godet roller speed of 2700-2900 m/min, a second godet roller temperature of 150-170° C., and a winding speed of 2640-2830 m/min.

12. The fiber for the medical antibacterial fabric of claim 6, wherein during the preparation of the fiber, the relaxation heat treatment has a temperature of 90-120° C. and a time of 20-30 min.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a schematic diagram of the structure of the trilobal spinneret hole in the present invention;

[0025] FIG. 2 is a schematic diagram of the distribution of the trilobal spinneret holes on a spinneret in the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Based on above mentioned method, the following embodiments are carried out for further demonstration in the present invention. It is to be understood that these embodiments are only intended to illustrate the invention and are not intended to limit the scope of the invention. In addition, it should be understood that after reading the contents described in the present invention, those technical personnel in this field can make various changes or modifications to the invention, and these equivalent forms also fall within the scope of the claims attached to the application.

[0027] The shapes and distributions of trilobal spinneret holes on the spinneret in the present invention are shown in FIGS. 1-2, wherein the spinneret hole on the spinneret is trilobal, wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:(1.5-2.5):(1.5-2.5), while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is (2.5-3.5):1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein all the trilobal spinneret holes are distributed in concentric circles, and the direction of the shortest leaf in each trilobal spinneret hole is randomly distributed.

[0028] FIGS. 1-2 are for illustration only and should not be construed as limiting the present invention.

Example 1

[0029] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0030] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5.4 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:1.7:1.5, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 3.3:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 24, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 10°, 60°, 2°, 30°, 90°, 15°, 22°, 90°, 1°, 3°, 170°, 40°, 45°, 30°, 10°, 100°, 106°, 100°, 41°, 80°, 65°, 2°, 50°;

[0031] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 100 ppm of silver ions;

[0032] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 109° C. and a time of 21 minutes;

[0033] wherein the FDY process involves technological parameters as a spinning temperature of 278° C., a cooling temperature of 23° C., a cooling wind speed of 2.19 m/s, a godet roller 1 speed of 1960 m/min, a godet roller 1 temperature of 92° C., a godet roller 2 speed of 2800 m/min, a godet roller 2 temperature of 163° C., and a winding speed of 2740 m/min;

[0034] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 26%, a crimp stability of 80%, a shrinkage elongation of 57%, and a crimp elastic recovery rate of 70%; a breaking strength of 2.4 cN/dtex, an elongation at break of 60%, and a monofilament fineness of 1.10 dtex.

Example 2

[0035] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0036] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5.5 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:1.5:1.9, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 2.8:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 24, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 28°, 162°, 64°, 3°, 6°, 105°, 22°, 90°, 1°, 3°, 170°, 40°, 45°, 30°, 10°, 100°, 106°, 100°, 41°, 80°, 65°, 2°, 50°;

[0037] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 300 ppm of silver ions;

[0038] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 109° C. and a time of 20 minutes;

[0039] wherein the FDY process involves technological parameters as a spinning temperature of 278° C., a cooling temperature of 23° C., a cooling wind speed of 2.19 m/s, a godet roller 1 speed of 1970 m/min, a godet roller 1 temperature of 92° C., a godet roller 2 speed of 2820 m/min, a godet roller 2 temperature of 168° C., and a winding speed of 2760 m/min;

[0040] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 26%, a crimp stability of 80%, a shrinkage elongation of 58%, and a crimp elastic recovery rate of 70%; a breaking strength of 2.45 cN/dtex, an elongation at break of 58%, and a monofilament fineness of 1.20 dtex.

Example 3

[0041] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0042] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5.4 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:2.0:2.5, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 3.5:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 30, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 10°, 60°, 2°, 30°, 90°, 15°, 22°, 90°, 1°, 3°, 170°, 40°, 45°, 30°, 10°, 100°, 106°, 100°, 41°, 80°, 65°, 2°, 50°, 28°, 162°, 64°, 3°, 6°, 105°;

[0043] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 290 ppm of silver ions;

[0044] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 104° C. and a time of 23 minutes;

[0045] wherein the FDY process involves technological parameters as a spinning temperature of 277° C., a cooling temperature of 23° C., a cooling wind speed of 2.12 m/s, a godet roller 1 speed of 1930 m/min, a godet roller 1 temperature of 91° C., a godet roller 2 speed of 2780 m/min, a godet roller 2 temperature of 161° C., and a winding speed of 2720 m/min;

[0046] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 27%, a crimp stability of 78%, a shrinkage elongation of 62%, and a crimp elastic recovery rate of 71%; a breaking strength of 2.48 cN/dtex, an elongation at break of 56%, and a monofilament fineness of 1.28 dtex.

Example 4

[0047] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0048] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5.4 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:1.6:2.0, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 2.8:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 36, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 10°, 60°, 2°, 30°, 90°, 15°, 28°, 162°, 64°, 3°, 6°, 105°, 121°, 93°, 161°, 123°, 75°, 129°, 22°, 90°, 1°, 3°, 170°, 40°, 45°, 30°, 10°, 100°, 106°, 100°, 41°, 80°, 65°, 2°, 50°;

[0049] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 295 ppm of silver ions;

[0050] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 98° C. and a time of 24 minutes;

[0051] wherein the FDY process involves technological parameters as a spinning temperature of 276° C., a cooling temperature of 21° C., a cooling wind speed of 2.04 m/s, a godet roller 1 speed of 1930 m/min, a godet roller 1 temperature of 90° C., a godet roller 2 speed of 2780 m/min, a godet roller 2 temperature of 159° C., and a winding speed of 2720 m/min;

[0052] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 29%, a crimp stability of 82%, a shrinkage elongation of 59%, and a crimp elastic recovery rate of 75%; a breaking strength of 2.5 cN/dtex, an elongation at break of 55%, and a monofilament fineness of 1.36 dtex.

Example 5

[0053] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0054] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5.2 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:2.5:2.4, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 2.7:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 24, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 152°, 96°, 54°, 100°, 175°, 75°, 22°, 90°, 1°, 3°, 170°, 40°, 45°, 30°, 10°, 100°, 106°, 100°, 41°, 80°, 65°, 2°, 50°;

[0055] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 121 ppm of silver ions;

[0056] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 97° C. and a time of 24 minutes;

[0057] wherein the FDY process involves technological parameters as a spinning temperature of 273° C., a cooling temperature of 21° C., a cooling wind speed of 2.01 m/s, a godet roller 1 speed of 1890 m/min, a godet roller 1 temperature of 89° C., a godet roller 2 speed of 2770 m/min, a godet roller 2 temperature of 158° C., and a winding speed of 2710 m/min;

[0058] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 29%, a crimp stability of 78%, a shrinkage elongation of 55%, and a crimp elastic recovery rate of 74%; a breaking strength of 2.55 cN/dtex, an elongation at break of 54%, and a monofilament fineness of 1.44 dtex.

Example 6

[0059] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0060] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:2.2:2.5, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 3:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 24, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 166°, 40°, 23°, 138°, 112°, 55°, 180°, 53°, 174°, 142°, 131°, 87°, 49°, 90°, 65°, 5°, 74°, 161°, 30°, 158°, 45°, 109°, 23°, 47°;

[0061] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 193 ppm of silver ions;

[0062] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 97° C. and a time of 27 minutes;

[0063] wherein the FDY process involves technological parameters as a spinning temperature of 271° C., a cooling temperature of 20° C., a cooling wind speed of 2 m/s, a godet roller 1 speed of 1880 m/min, a godet roller 1 temperature of 88° C., a godet roller 2 speed of 2770 m/min, a godet roller 2 temperature of 153° C., and a winding speed of 2710 m/min;

[0064] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 29%, a crimp stability of 78%, a shrinkage elongation of 58%, and a crimp elastic recovery rate of 73%; a breaking strength of 2.56 cN/dtex, an elongation at break of 53%, and a monofilament fineness of 1.50 dtex.

Example 7

[0065] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0066] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:1.5:2.0, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 2.9:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 48, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 10°, 60°, 2°, 30°, 90°, 15°, 22°, 90°, 1°, 3°, 170°, 40°, 45°, 30°, 10°, 100°, 106°, 100°, 41°, 80°, 65°, 2°, 50°, 166°, 40°, 23°, 138°, 112°, 55°, 180°, 53°, 174°, 142°, 131°, 87°, 49°, 90°, 65°, 5°, 74°, 161°, 30°, 158°, 45°, 109°, 23°, 47°;

[0067] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 201 ppm of silver ions;

[0068] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 90° C. and a time of 30 minutes;

[0069] wherein the FDY process involves technological parameters as a spinning temperature of 270° C., a cooling temperature of 20° C., a cooling wind speed of 1.8 m/s, a godet roller 1 speed of 1800 m/min, a godet roller 1 temperature of 85° C., a godet roller 2 speed of 2700 m/min, a godet roller 2 temperature of 150° C., and a winding speed of 2640 m/min;

[0070] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 28%, a crimp stability of 82%, a shrinkage elongation of 61%, and a crimp elastic recovery rate of 72%; a breaking strength of 2.59 cN/dtex, an elongation at break of 52%, and a monofilament fineness of 1.00 dtex.

Example 8

[0071] A method for preparing a fiber for medical antibacterial fabric, comprising:

[0072] (1) cooling an antibacterial polyester melt (intrinsic viscosity of 5.5 dL/g) by ring-blowing after extruded from a trilobal spinneret hole on a spinneret; wherein a ratio of lengths of three leaves from the same trilobal spinneret hole is 1.0:2.0:2.5, while the widths of three leaves are the same, wherein the ratio of the length to the width of the shortest leaf is 2.5:1, and the angle between center lines of two adjacent leaves is 120°; wherein the shapes and sizes of three leaves from different trilobal spinneret holes are the same; wherein the spinneret is equipped with a circle of equally spaced trilobal spinneret holes, the number of which is 24, and taking the central axis of the shortest leaf of one of the trilobal spinneret holes as the reference line, all the central axises of the shortest leaves of other trilobal spinneret holes are at a certain angle with the reference line, along the clockwise direction, the included angles of the inferior angles are 10°, 60°, 2°, 30°, 90°, 15°, 22°, 90°, 1°, 3°, 170°, 40°, 45°, 30°, 10°, 100°, 106°, 100°, 41°, 80°, 65°, 2°, 50°;

[0073] wherein the antibacterial polyester mainly consists of polyester and antibacterial agents dispersed in it, wherein the antibacterial agent is a silver-based antibacterial agent RHA-02 with a content of 202 ppm of silver ions;

[0074] (2) manufacturing a fully drawn yarn according to the FDY process, then the fiber for medical antibacterial fabric is prepared after a relaxation heat treatment at a temperature of 120° C. and a time of 20 minutes;

[0075] wherein the FDY process involves technological parameters as a spinning temperature of 280° C., a cooling temperature of 25° C., a cooling wind speed of 2.3 m/s, a godet roller 1 speed of 2000 m/min, a godet roller 1 temperature of 95° C., a godet roller 2 speed of 2900 m/min, a godet roller 2 temperature of 170° C., and a winding speed of 2830 m/min;

[0076] wherein the prepared fiber for medical antibacterial fabric has a three-dimensional crimp shape, and comprises a plurality of antibacterial polyester monofilaments with trilobal cross-section; wherein the fiber for medical antibacterial fabric comprises mechanical performance indices as a crimp shrinkage of 28%, a crimp stability of 82%, a shrinkage elongation of 58%, and a crimp elastic recovery rate of 72%; a breaking strength of 2.6 cN/dtex, an elongation at break of 50%, and a monofilament fineness of 1.10 dtex.