Cross-shaped moisture absorption and sweat releasing polyester fiber and preparation method thereof

Abstract

The invention provides a cross-shaped moisture absorption and sweat releasing polyester fiber and a preparation method thereof, and relates to the technical field of polyester fiber production. The cross section of the cross-shaped moisture absorption and sweat releasing polyester fiber is in a cross shape, the cross-shaped moisture absorption and sweat releasing polyester fiber comprises four ribs evenly distributed in the circumferential direction and a cross-shaped through hole located in the center, a plurality of micropores are distributed in the surfaces of the ribs, and the average pore size of the micropores is 0.1-0.5 micrometer; secondly, the polyester fiber is composed of hydrophilic modified polyester, hydrophilic polyester master batches containing calcium carbonate powder and a moisture absorption and sweat releasing agent according to the mass percentage of 70-85: 10-20: 5-10, and the moisture absorption and sweat releasing agent is a polyether ester block copolymer. According to the cross-shaped moisture absorption and sweat releasing polyester fiber, the cross section is cross-shaped, the cross-shaped moisture absorption and sweat releasing polyester fiber has a large specific surface area, moisture diffusion and evaporation are facilitated, the moisture absorption performance of the fiber can be improved through the micropores in the surfaces of the beads, air circulation is facilitated through the cross-shaped through hole in the center, and the sweat releasing effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of polyester fiber production, in particular to a cross-shaped moisture absorption and perspiration-releasing polyester fiber and a preparation method thereof. Background Art

[0002] Take cotton as an example of natural fiber, which has good moisture absorption and is comfortable to wear. However, when a person sweats a little more, cotton fiber will swell due to moisture absorption, and its air permeability will decrease and stick to the skin. At the same time, the water dispersion rate is also slow, which will cause a cold and wet feeling to the human body. Take polyester as an example of synthetic fiber, which has low water absorption and poor moisture permeability. Due to its static electricity accumulation, it is easy to cause entanglement when wearing, especially when it is easy to feel stuffy during activities, so moisture absorption and sweat-wicking fibers have emerged. Moisture absorption and sweat-wicking fibers use the capillary phenomenon generated by the fine grooves on the fiber surface to make sweat quickly migrate to the surface of the fabric and disperse through wicking, diffusion, and transmission, thereby achieving the purpose of moisture conduction and quick drying.

[0003] At present, most moisture-absorbing and perspiration-wicking fabrics on the market use conventional circular cross-section polyester fibers, which have limited moisture-absorbing and perspiration-wicking performance. With the improvement of people's living standards and the enhancement of health awareness, the demand for functional fabrics is growing. Therefore, it is particularly important to develop a new type of polyester fiber with excellent moisture-absorbing and perspiration-wicking performance; secondly, the moisture-absorbing and perspiration-wicking polyester fibers in the prior art are usually processed into a cross shape or a Y shape, and the corresponding physical processing method usually adopts the method of changing the shape of the spinneret hole to produce a special-shaped fiber with surface grooves, but the middle part of the adjacent cross or Y shape is a solid structure, which is not conducive to air circulation. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a cross-shaped moisture wicking polyester fiber and a preparation method thereof, which solves the problem that the middle parts of adjacent cross-shaped or Y-shaped fibers are solid structures, which is not conducive to air circulation.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical scheme: a cross-shaped moisture-absorbing and perspiration-wicking polyester fiber, the cross-section of the polyester fiber is a cross-shape, which includes four ridges evenly distributed along the circumference and a cross-shaped through hole located in the center, and a plurality of micropores are distributed on the surface of the ridges, and the average pore size of the micropores is 0.1-0.5 microns.

[0008] As mentioned above, its cross-section is cross-shaped, which has a large specific surface area, which is conducive to the diffusion and evaporation of moisture. The micropores on the surface of the ridges can increase the moisture absorption performance of the fiber, and the cross-shaped through hole in the center is conducive to air circulation and improves the perspiration effect.

[0009] Preferably, the polyester fiber is composed of hydrophilic modified polyester, hydrophilic polyester masterbatch containing calcium carbonate powder, and moisture absorption and perspiration agent in a mass percentage of 70-85:10-20:5-10.

[0010] Preferably, the moisture wicking agent is a polyether ester block copolymer.

[0011] The present invention further discloses a method for preparing a cross-shaped moisture absorption and perspiration-releasing polyester fiber, comprising the following steps:

[0012] Step 1: Raw material pretreatment:

[0013] Slice and mix the hydrophilic modified polyester and the hydrophilic polyester masterbatch containing calcium carbonate powder in an amount of 70-85:10-20 by mass percentage, and dry the sliced ​​polyester to obtain a slice body;

[0014] Step 2: Mixing:

[0015] The dried sliced ​​body and the moisture wicking agent are mixed again in a mass ratio of 90-95:5-10;

[0016] Step 3: Melt Extrusion:

[0017] Adding the mixed materials into a screw extruder for melt extrusion;

[0018] Step 4: Spinning:

[0019] The extruded melt is spun through a cross-shaped spinneret to form primary fibers;

[0020] Step 5: Stretching and heat setting:

[0021] The nascent fibers are subjected to multi-stage stretching and heat setting treatment at a certain temperature to obtain cross-shaped moisture absorption and perspiration-releasing polyester fibers.

[0022] Preferably, in step 1, the water content of the slice is less than 0.01%.

[0023] Preferably, in step three, the melt extrusion temperature is 280-300°C.

[0024] Preferably, in step 4, the spinneret includes a central cross hole and eight cross holes evenly distributed on the surface, and the maximum diameter of the cross holes is 1-2.5 mm.

[0025] Preferably, in step five, the multi-stage stretching includes: a primary stretching ratio of 2.5 times, a secondary stretching ratio of 2.0 times; and the temperature of the heat setting treatment is 180-200°C.

[0026] (III) Beneficial effects

[0027] The present invention provides a cross-shaped moisture-absorbing and perspiration-releasing polyester fiber and a preparation method thereof. The fiber has the following beneficial effects:

[0028] 1. The cross-shaped moisture-absorbing and perspiration-releasing polyester fiber provided by the present invention has a cross-shaped cross section and a large specific surface area, which is conducive to the diffusion and evaporation of moisture; the micropores on the surface of the ridges can increase the moisture absorption performance of the fiber; the cross-shaped through hole in the center is conducive to the circulation of air and improves the perspiration effect.

[0029] 2. The polyester fiber prepared by the preparation method of the present invention realizes the production of polyester fiber with a special cross-sectional shape by changing the shape of the spinneret and optimizing the spinning process, thereby improving the moisture absorption and perspiration wicking properties of the fiber while maintaining the strength and durability of the fiber.

[0030] In summary, the present invention provides a cross-shaped moisture-absorbing and perspiration-releasing polyester fiber and a preparation method thereof, which not only solves the problems existing in the prior art, but also has significant technical advantages and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the polyester fiber structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the spinneret structure of the present invention;

[0033] Figure 3 It is a schematic flow chart of the preparation method of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] like Figure 1 As shown, an embodiment of the present invention provides a cross-shaped moisture wicking polyester fiber, the cross-section of the polyester fiber is cross-shaped, and includes four ridges evenly distributed along the circumference and a cross-shaped through hole located in the center, a plurality of micropores are distributed on the surface of the ridges, and the average pore size of the micropores is 0.1 microns. The cross-section of the polyester fiber is cross-shaped, has a large specific surface area, is conducive to the diffusion and evaporation of moisture, the micropores on the surface of the ridges can increase the moisture absorption performance of the fiber, and the cross-shaped through hole in the center is conducive to the circulation of air and improves the perspiration effect.

[0037] Secondly, the polyester fiber is composed of hydrophilic modified polyester, hydrophilic polyester masterbatch containing calcium carbonate powder, and moisture absorption and perspiration agent in a mass percentage of 70:20:10. Specifically, the moisture absorption and perspiration agent is a polyether ester block copolymer.

[0038] like Figure 2 and Figure 3 As shown, the embodiment of the present invention also provides a method for preparing a cross-shaped moisture absorption and perspiration polyester fiber, comprising the following steps:

[0039] Step 1: Raw material pretreatment:

[0040] The hydrophilic modified polyester and the hydrophilic polyester masterbatch containing calcium carbonate powder are sliced ​​and mixed in an amount of 70:20 by mass percentage, and then dried after slicing to obtain a slice body, wherein the water content of the slice body is less than 0.01%;

[0041] Step 2: Mixing:

[0042] The dried slices are mixed with the moisture wicking agent in a mass ratio of 90:10;

[0043] Step 3: Melt Extrusion:

[0044] The mixed materials are added into a screw extruder for melt extrusion at a temperature of 280°C;

[0045] Step 4: Spinning:

[0046] The extruded melt is passed through a cross-shaped spinneret (such as Figure 2 As shown), the spinneret includes a central cross hole and eight cross holes evenly distributed on the surface, and the maximum diameter of the cross holes is 1 mm to form primary fibers;

[0047] Step 5: Stretching and heat setting:

[0048] The spun fibers are subjected to multi-stage stretching, specifically, the multi-stage stretching includes: a primary stretching ratio of 2.5 times, a secondary stretching ratio of 2.0 times, and heat setting treatment at a certain temperature, specifically, the heat setting treatment temperature is 180°C, to obtain a cross-shaped moisture wicking polyester fiber.

[0049] Embodiment 2:

[0050] like Figure 1As shown, an embodiment of the present invention provides a cross-shaped moisture wicking polyester fiber, the cross-section of the polyester fiber is cross-shaped, which includes four ridges evenly distributed along the circumference and a cross-shaped through hole located in the center, a plurality of micropores are distributed on the surface of the ridges, and the average pore size of the micropores is 0.3 microns. The cross-section of the polyester fiber is cross-shaped, has a large specific surface area, is conducive to the diffusion and evaporation of moisture, the micropores on the surface of the ridges can increase the moisture absorption performance of the fiber, and the cross-shaped through hole in the center is conducive to the circulation of air and improves the perspiration effect.

[0051] Secondly, the polyester fiber is composed of hydrophilic modified polyester, hydrophilic polyester masterbatch containing calcium carbonate powder, and moisture absorbing and perspiration releasing agent in a weight percentage of 80:10:10. Specifically, the moisture absorbing and perspiration releasing agent is a polyether ester block copolymer.

[0052] like Figure 2 and Figure 3 As shown, the embodiment of the present invention also provides a method for preparing a cross-shaped moisture absorption and perspiration polyester fiber, comprising the following steps:

[0053] Step 1: Raw material pretreatment:

[0054] The hydrophilic modified polyester and the hydrophilic polyester masterbatch containing calcium carbonate powder are sliced ​​and mixed in an amount of 80:10 by mass percentage, and then dried after slicing to obtain a slice body, wherein the water content of the slice body is less than 0.01%;

[0055] Step 2: Mixing:

[0056] The dried slices are mixed with the moisture wicking agent in a mass ratio of 90:10;

[0057] Step 3: Melt Extrusion:

[0058] The mixed materials are added into a screw extruder for melt extrusion at a temperature of 290°C;

[0059] Step 4: Spinning:

[0060] The extruded melt is passed through a cross-shaped spinneret (such as Figure 2 As shown), the spinneret includes a central cross hole and eight cross holes evenly distributed on the surface, and the maximum diameter of the cross holes is 2 mm to form primary fibers;

[0061] Step 5: Stretching and heat setting:

[0062] The spun fibers are subjected to multi-stage stretching, specifically, the multi-stage stretching includes: a primary stretching ratio of 2.5 times, a secondary stretching ratio of 2.0 times, and heat setting treatment at a certain temperature, specifically, the heat setting treatment temperature is 190° C., to obtain a cross-shaped moisture wicking polyester fiber.

[0063] Embodiment three:

[0064] like Figure 1 As shown, an embodiment of the present invention provides a cross-shaped moisture wicking polyester fiber, the cross-section of the polyester fiber is cross-shaped, and includes four ridges evenly distributed along the circumference and a cross-shaped through hole located in the center, a plurality of micropores are distributed on the surface of the ridges, and the average pore size of the micropores is 0.5 microns. The cross-section of the polyester fiber is cross-shaped, has a large specific surface area, is conducive to the diffusion and evaporation of moisture, the micropores on the surface of the ridges can increase the moisture absorption performance of the fiber, and the cross-shaped through hole in the center is conducive to the circulation of air and improves the perspiration effect.

[0065] Secondly, the polyester fiber is composed of hydrophilic modified polyester, hydrophilic polyester masterbatch containing calcium carbonate powder, and moisture absorbing and perspiration releasing agent in a mass percentage of 85:10:5. Specifically, the moisture absorbing and perspiration releasing agent is a polyether ester block copolymer.

[0066] like Figure 2 and Figure 3 As shown, the embodiment of the present invention also provides a method for preparing a cross-shaped moisture absorption and perspiration polyester fiber, comprising the following steps:

[0067] Step 1: Raw material pretreatment:

[0068] The hydrophilic modified polyester and the hydrophilic polyester masterbatch containing calcium carbonate powder are sliced ​​and mixed in an amount of 85:10 by mass percentage, and then dried after slicing to obtain a slice body, wherein the water content of the slice body is less than 0.01%;

[0069] Step 2: Mixing:

[0070] The dried slices are mixed with the moisture wicking agent in a mass ratio of 95:5;

[0071] Step 3: Melt Extrusion:

[0072] The mixed materials are added into a screw extruder for melt extrusion at a temperature of 300°C;

[0073] Step 4: Spinning:

[0074] The extruded melt is passed through a cross-shaped spinneret (such as Figure 2 As shown), the spinneret includes a central cross hole and eight cross holes evenly distributed on the surface, and the maximum diameter of the cross holes is 2.5 mm to form primary fibers;

[0075] Step 5: Stretching and heat setting:

[0076] The spun fibers are subjected to multi-stage stretching, specifically, the multi-stage stretching includes: a primary stretching ratio of 2.5 times, a secondary stretching ratio of 2.0 times, and heat setting treatment at a certain temperature, specifically, the heat setting treatment temperature is 200°C, to obtain a cross-shaped moisture wicking polyester fiber.

[0077] Comparative Example:

[0078] This comparative example provides a method for preparing a conventional circular cross-section polyester fiber, comprising the following steps:

[0079] Step 1: Raw material pretreatment:

[0080] Drying ordinary polyester chips to obtain dry polyester chips with a water content of less than 0.01%;

[0081] Step 2: Melt extrusion:

[0082] The dried polyester chips are added into a screw extruder for melt extrusion at a temperature of 280°C;

[0083] Step 3: Spinning:

[0084] The extruded melt is spun through a circular spinneret to form primary fibers;

[0085] Step 4: Stretching and heat setting:

[0086] The spun fibers are subjected to multi-stage stretching, specifically, the multi-stage stretching includes: a primary stretching ratio of 2.5 times, a secondary stretching ratio of 2.0 times, and heat setting treatment at a certain temperature, specifically, the heat setting treatment temperature is 180° C., to obtain a traditional circular cross-section polyester fiber.

[0087] Experimental example:

[0088] The following performance tests were performed on the polyester fibers prepared in Examples 1, 2, 3 and the comparative example:

[0089] Moisture absorption performance test: using the moisture absorption rate test method, the fiber sample is placed in a constant temperature and humidity chamber (temperature 20°C, relative humidity 65%), weighed after balancing for 24 hours, and the moisture absorption rate is calculated.

[0090] Perspiration performance test: To conduct a capillary effect test, place the fiber vertically with the lower end immersed in water and record the height to which the water rises within five minutes.

[0091] Air permeability test: Use an air permeability tester to measure the flow rate of air passing through the fiber.

[0092] The test results are as follows:

[0093]

[0094] In summary, by comparing Examples 1, 2, and 3 with the comparative example, it can be seen that the cross-shaped moisture wicking polyester fiber of the present invention has significant moisture wicking performance and good air permeability. Compared with the traditional circular cross-section polyester fiber, the cross-shaped cross-section fiber has a larger surface area, which helps to improve the moisture wicking performance. In addition, the microporous design on the ridge surface further enhances the moisture wicking ability of the fiber, so that the fiber can quickly absorb and discharge moisture while maintaining good mechanical properties, thereby improving wearing comfort.

[0095] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cross-shaped moisture wicking polyester fiber, characterized in that: The cross section of the polyester fiber is cross-shaped, comprising four convex ridges evenly distributed along the circumference and a cross-shaped through hole located in the center. A plurality of micropores are distributed on the surface of the convex ridges, and the average pore size of the micropores is 0.1-0.5 microns.

2. The cross-shaped moisture wicking polyester fiber according to claim 1, characterized in that: The polyester fiber is composed of hydrophilic modified polyester, hydrophilic polyester masterbatch containing calcium carbonate powder, and moisture absorption and perspiration removal agent in a mass percentage of 70-85:10-20:5-10.

3. The cross-shaped moisture wicking polyester fiber according to claim 2, characterized in that: The moisture absorption and perspiration releasing agent is a polyether ester block copolymer.

4. A method for preparing a cross-shaped moisture wicking polyester fiber, characterized in that: The following steps are involved: Step 1: Raw material pretreatment: Slice and mix the hydrophilic modified polyester and the hydrophilic polyester masterbatch containing calcium carbonate powder in an amount of 70-85:10-20 by mass percentage, and dry the sliced ​​polyester to obtain a slice body; Step 2: Mixing: The dried sliced ​​body and the moisture wicking agent are mixed again in a mass ratio of 90-95:5-10; Step 3: Melt Extrusion: Adding the mixed materials into a screw extruder for melt extrusion; Step 4: Spinning: The extruded melt is spun through a cross-shaped spinneret to form primary fibers; Step 5: Stretching and heat setting: The nascent fibers are subjected to multi-stage stretching and heat setting treatment at a certain temperature to obtain cross-shaped moisture absorption and perspiration-releasing polyester fibers.

5. The method for preparing a cross-shaped moisture wicking polyester fiber according to claim 4, characterized in that: In step 1, the water content of the sliced ​​body is less than 0.01%.

6. The method for preparing a cross-shaped moisture wicking polyester fiber according to claim 4, characterized in that: In step three, the melt extrusion temperature is 280-300°C.

7. The method for preparing a cross-shaped moisture wicking polyester fiber according to claim 4, characterized in that: In step 4, the spinneret includes a central cross hole and eight cross holes evenly distributed on the surface, and the maximum diameter of the cross holes is 1-2.5 mm.

8. The method for preparing a cross-shaped moisture wicking polyester fiber according to claim 4, characterized in that: In step five, the multi-stage stretching includes: a primary stretching ratio of 2.5 times, a secondary stretching ratio of 2.0 times; and the temperature of the heat setting treatment is 180-200°C.

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