Preparation method of bionic anti-drag swimsuit fabric

Abstract

The invention discloses a preparation method of a bionic anti-drag swimsuit fabric, and belongs to the field of fabric preparation processes, and the preparation method comprises a preparation process, the bionic anti-drag swimsuit fabric prepared by adopting the preparation process and an anti-drag post-treatment process. Due to the combination of the 1 + 1 rib stitches and the weaving configuration of the yarns, the stacked woven structures are mutually covered and folded to form a fish scale-shaped three-dimensional structure, the staggered fish scale-shaped three-dimensional structure forms a V-shaped structure, and when the surface of the bionic anti-drag swimsuit fabric makes contact with water and swims, water flow is always in the same direction; friction resistance borne by the bionic anti-drag swimsuit fabric during swimming in water is reduced, the bionic anti-drag swimsuit fabric is finished through the anti-drag finishing liquid, a flexible film layer is formed on the surface of the bionic anti-drag swimsuit fabric, transition of a boundary layer between water flow and the surface of the bionic anti-drag swimsuit fabric is controlled, and the bionic anti-drag swimsuit fabric can be obtained. And the flowing friction resistance of a solid-liquid interface can be effectively reduced.

Description

Technical Field

[0001] The invention discloses a fabric preparation process, and in particular relates to a method for preparing a bionic drag-reducing swimsuit fabric. Background Art

[0002] In swimming competitions, the improvement of swimming skills and physical strength is the most important factor in order to break the speed record. However, reducing the resistance of swimming suits to water has also become an important issue. Therefore, the fabrics used in swimsuits have been improved.

[0003] The resistance of water is about 800 times that of air, so it is very difficult to reduce resistance in water compared to land sports. For swimmers of the same size and propulsion in a 100m freestyle competition, if the water resistance to the human body is reduced by 10%, the time spent swimming 100m can be shortened by 0.15s, and the distance can be ahead of the opponent by 30cm. Therefore, a swimsuit that can reduce resistance can improve the performance of swimmers. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing a bionic drag-reducing swimsuit fabric in order to solve the above-mentioned problems.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for preparing a bionic drag-reducing swimsuit fabric, including a preparation process, a bionic drag-reducing swimsuit fabric prepared by the preparation process, and a drag-reducing post-treatment process, wherein the bionic drag-reducing swimsuit fabric includes a stacked woven structure and a connection structure, and the preparation process includes the following steps: S1, bionic drag-reducing swimsuit fabric is woven with three kinds of yarns, namely PVA yarn, nylon-spandex core-spun yarn and polyester yarn, and is woven on a 14-needle double-needle bed flat knitting machine. The knitting yarn mouths are No. 1 yarn mouth and No. 6 yarn mouth. The No. 1 yarn mouth is threaded with polyester yarn, and the No. 6 yarn mouth is a double yarn mouth with upper and lower threading holes. The nylon-spandex core-spun yarn and PVA yarn are introduced from the same opening of the No. 6 yarn mouth and passed through the upper and lower openings of the No. 6 yarn mouth respectively. The number of knitting paths of the connection structure is 13, and the number of knitting paths of the stacked knitting structure is 15; S2, the bionic drag-reducing swimsuit fabric is firstly woven by weaving the connection structure, and then the stacked woven structure is woven. The connection structure and the stacked woven structure are woven alternately and cyclically. The connection structure does not fall off when it is woven to the previous row at the edge of the base fabric. The stacked woven structure uses the front needle bed and the rear needle bed to weave a 1+1 rib structure together. When weaving the stacked woven structure, the front needle bed and the rear needle bed separately weave the connection points between the stacked woven structures, and the lateral connection between adjacent stacked woven structures is connected to a horizontal row of coils of the connection structure that has not fallen off. S3, when the connection structure and the stacked braiding structure of one horizontal row are woven as a cycle, the connection structure is woven again from the next horizontal row, and the connection structure of this cycle is interlaced with the coils of the connection structure of the previous cycle that have not been unhooked, and the coils of the connection structure of the previous cycle that have not been unhooked are completely connected with the coils of the connection structure of the next cycle by partial tucks, and the stacked braiding structure is tightened to form a stacked structure after two adjacent longitudinal connection structures are connected by coils, and the coils of the connection structure shrink to serve as the base fabric of the bionic drag-reducing swimsuit fabric.

[0006] The prepared bionic drag-reducing swimsuit fabric is subjected to a drag-reducing post-treatment process, and the drag-reducing post-treatment process comprises the following steps: A1, prepare a drag-reducing finishing liquid according to the following parts by mass: put 10 parts of polyvinyl alcohol solid and 90 parts of distilled water into a magnetic stirring tank, and stir and mix them at a constant speed under magnetic stirring for 1 hour in a 75°C water bath to obtain a polyvinyl alcohol solution with a mass fraction of 10%, and add 0-3 parts of sodium alginate and 0-8 parts of hydroxypropyl methylcellulose during the stirring and mixing process; after the polyvinyl alcohol solution is allowed to stand and cool to room temperature, 0.1 parts of glutaraldehyde are added and stirred at a constant speed under magnetic stirring for 2 minutes; after the polyvinyl alcohol solution and glutaraldehyde are fully mixed, 1 part of 1.2 mol / L hydrochloric acid solution is added and stirred at a constant speed under magnetic stirring for 2 minutes to obtain a drag-reducing finishing liquid; A2, finishing of bionic drag reducing swimsuit fabric with drag reducing finishing liquid, adding 0.04 parts of photocuring agent 1173 to the drag reducing finishing liquid, immersing the bionic drag reducing swimsuit fabric in the drag reducing finishing liquid for 15 seconds, taking out the bionic drag reducing swimsuit fabric, and rolling the bionic drag reducing swimsuit fabric through a padding machine to obtain a bionic drag reducing swimsuit fabric with a liquid carrying rate of 70%, placing the rolled bionic drag reducing swimsuit fabric in an oven and drying it at 90°C for 5 minutes, and then exposing it to an ultraviolet lamp with a wavelength of 365nm and a power of 30W for 2 minutes to obtain the bionic drag reducing swimsuit fabric with drag reducing finishing.

[0007] Preferably, the sodium alginate and hypromellose are used in 1 part and 6 parts respectively.

[0008] Preferably, the bionic drag-reducing swimsuit has a horizontal and vertical weaving density of 7.5 rows / cm and 11 columns / cm respectively, and a thread length of 9 cm / 50 stitches.

[0009] Preferably, the stacked braided structure and the connecting structure are combined on the bionic drag-reducing swimsuit fabric to form a three-dimensional structure in the shape of fish scales.

[0010] Compared with the prior art, the present invention has the following beneficial effects: Firstly, by combining the stacked braided structure and the connection structure, the combination of 1+1 rib structure and the braiding configuration of the yarn, and by taking advantage of the braiding height of the stacked braided structure, the fabric will be tightened after two adjacent longitudinal connection structures are connected by coils, so that the stacked braided structures are covered and folded to form a fish scale-like three-dimensional structure. The staggered fish scale-like three-dimensional structure forms a V-shaped structure. When the surface of the bionic drag-reducing swimsuit fabric contacts water and swims, the water flow always follows the same direction, thereby reducing the friction resistance of the bionic drag-reducing swimsuit fabric when swimming in the water; Secondly, after being finished with drag-reducing finishing liquid, a polymer chain porous structure with a flexible interpenetrating double-mesh structure composed of large and small pores and a flexible membrane layer with a rich and dense porous structure are formed on the surface of the bionic drag-reducing swimsuit fabric. This structure can form a laminar structure between the surface of the bionic drag-reducing swimsuit fabric and water, and through the formed flexible membrane layer surface, the turbulent structure of the flow passing through the porous structure is changed, thereby controlling the transition of the boundary layer between the water flow and the surface of the bionic drag-reducing swimsuit fabric, and effectively reducing the flow friction resistance at the solid-liquid interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A weaving pattern for a layered weaving structure; Figure 2 Preparation of diagrams for connection structures; Figure 3 This is a partial appearance picture of the bionic drag-reducing swimsuit fabric; Figure 4 A chart showing the effect of drag-reducing finishing liquids prepared with different components on the drag reduction rate of bionic drag-reducing swimsuit fabrics. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0013] A method for preparing a bionic drag-reducing swimsuit fabric, including a preparation process, a bionic drag-reducing swimsuit fabric prepared by the preparation process, and a drag-reducing post-treatment process, wherein the bionic drag-reducing swimsuit fabric includes a stacked woven structure and a connection structure, and the preparation process includes the following steps: S1, bionic drag-reducing swimsuit fabric is woven with three kinds of yarns, namely PVA yarn, nylon-spandex core-spun yarn and polyester yarn, and is woven on a 14-needle double-needle bed flat knitting machine. The knitting yarn mouths are No. 1 yarn mouth and No. 6 yarn mouth. The No. 1 yarn mouth is threaded with polyester yarn, and the No. 6 yarn mouth is a double yarn mouth with upper and lower threading holes. The nylon-spandex core-spun yarn and PVA yarn are introduced from the same opening of the No. 6 yarn mouth and passed through the upper and lower openings of the No. 6 yarn mouth respectively. The number of knitting paths of the connection structure is 13, and the number of knitting paths of the stacked knitting structure is 15; S2, the bionic drag-reducing swimsuit fabric is firstly woven by weaving the connection structure, and then the stacked woven structure is woven. The connection structure and the stacked woven structure are woven alternately and cyclically. The connection structure does not fall off when it is woven to the previous row at the edge of the base fabric. The stacked woven structure uses the front needle bed and the rear needle bed to weave a 1+1 rib structure together. When weaving the stacked woven structure, the front needle bed and the rear needle bed separately weave the connection points between the stacked woven structures, and the lateral connection between adjacent stacked woven structures is connected to a horizontal row of coils of the connection structure that has not fallen off. S3, when the connection structure and the stacked braided structure of one horizontal row are woven as a cycle, the connection structure is woven again from the next horizontal row, and the connection structure of this cycle is interlaced with the coils of the connection structure of the previous cycle that have not been unhooked, and the coils of the connection structure of the previous cycle that have not been unhooked are completely connected with the coils of the connection structure of the next cycle by partial tucking, and the stacked braided structure is tightened to form a stacked structure after two adjacent longitudinal connection structures are connected by coils, and the coils of the connection structure are contracted to serve as the base fabric of the bionic drag-reducing swimsuit fabric; like Figure 1 The following is a weaving diagram of the connection structure from bottom to top 1-13, as shown in Figure 2 The figure shows the weaving diagram of the stacked braided structure from bottom to top with 14-28 paths. The stacked braided structure and the connecting structure are combined on the bionic drag-reducing swimsuit fabric to form a three-dimensional structure in the shape of fish scales. Due to the weaving height of the stacked braided structure, the fabric will be tightened after two adjacent longitudinal connecting structures are connected by coils, so that the stacked braided structures cover and fold each other, as shown in FIG. Figure 3As shown, since the number of coils at the transverse connection is less than the number of coils in the main part of the stacked braided structure, the stacked braided structure unit will shrink to form a fish scale-like three-dimensional structure. A single fish scale-like three-dimensional structure is composed of a connection structure and a stacked braided structure. The fish scale-like three-dimensional structures are arranged in a diamond shape and staggered. The staggered fish scale-like three-dimensional structures form a V-shaped structure and are arranged along the direction of the water flow, so that when the surface of the bionic drag-reducing swimsuit fabric contacts the water and swims, the water flow is always in the same direction, thereby reducing the friction resistance of the bionic drag-reducing swimsuit fabric when swimming in the water; The prepared bionic drag-reducing swimsuit fabric is subjected to a drag-reducing post-treatment process, and the drag-reducing post-treatment process comprises the following steps: A1, prepare a drag-reducing finishing liquid according to the following parts by mass: put 10 parts of polyvinyl alcohol solid and 90 parts of distilled water into a magnetic stirring tank, and stir and mix them at a constant speed under magnetic stirring for 1 hour in a 75°C water bath to obtain a polyvinyl alcohol solution with a mass fraction of 10%, and add 0-3 parts of sodium alginate and 0-8 parts of hydroxypropyl methylcellulose during the stirring and mixing process; after the polyvinyl alcohol solution is allowed to stand and cool to room temperature, 0.1 parts of glutaraldehyde are added and stirred at a constant speed under magnetic stirring for 2 minutes; after the polyvinyl alcohol solution and glutaraldehyde are fully mixed, 1 part of 1.2 mol / L hydrochloric acid solution is added and stirred at a constant speed under magnetic stirring for 2 minutes to obtain a drag-reducing finishing liquid; A2, finishing of bionic drag reducing swimsuit fabric with drag reducing finishing liquid, adding 0.04 parts of photocuring agent 1173 to the drag reducing finishing liquid, immersing the bionic drag reducing swimsuit fabric in the drag reducing finishing liquid for 15 seconds, taking out the bionic drag reducing swimsuit fabric, and padding the bionic drag reducing swimsuit fabric with a liquid carrying rate of 70%, placing the bionic drag reducing swimsuit fabric after padding in an oven, drying it at 90°C for 5 minutes, and then exposing it to an ultraviolet lamp with a wavelength of 365nm and a power of 30W for 2 minutes to obtain the bionic drag reducing swimsuit fabric with drag reducing finishing; After being finished with the drag-reducing finishing liquid, the -OH groups in the polyvinyl alcohol polymer solution in the drag-reducing finishing liquid are cross-linked with the -CHO in glutaraldehyde, and partially cross-linked with the PVA yarn in the bionic drag-reducing swimsuit fabric, forming a flexible interpenetrating double-mesh structure of polymer chains composed of large pores and small pores. The large pores and small pores are evenly distributed, and a flexible membrane layer with a rich and dense porous structure is formed on the surface of the bionic drag-reducing swimsuit fabric. This structure can form a laminar structure between the surface of the bionic drag-reducing swimsuit fabric and water, and the turbulent structure of the flow passing through the porous structure is changed through the formed flexible membrane layer surface, thereby controlling the transition of the boundary layer between the water flow and the surface of the bionic drag-reducing swimsuit fabric, and effectively reducing the flow friction resistance at the solid-liquid interface.

[0014] The parameters of the drag reduction finishing liquid prepared by five different schemes with only the sodium alginate and hydroxypropyl methylcellulose components changed are as follows: ①: 0 parts of sodium alginate; 0 parts of hydroxypropyl methylcellulose; ②: 1 part sodium alginate; 0 part hydroxypropyl methylcellulose; ③: 2 parts of sodium alginate; 0 parts of hypromellose; ④: 1 part sodium alginate; 6 parts hydroxypropyl methylcellulose; ⑤: 1 part sodium alginate; 8 parts hydroxypropyl methylcellulose; like Figure 4 The figure shows the effect of drag reduction finishing liquid prepared with different components on the drag reduction rate of bionic drag reduction swimsuit fabric. The test adopts the drag reduction rate of bionic drag reduction swimsuit fabric cut into 10×10cm size and placed in water with a flow rate of 5m / s for 2 hours. From ①, ②, and ③, it can be seen that the drag reduction rate increases first and then decreases with the increase of sodium alginate component. This is because when sodium alginate is excessive, sodium alginate will hinder the formation of the porous structure of the polymer chain, making it difficult for the film layer to adhere to the surface of the bionic drag reduction swimsuit fabric and the porous structure is difficult to form; from ②, ④, and ⑤, it can be seen that the drag reduction rate increases first and then decreases with the increase of hydroxypropyl methylcellulose component. This is because the appropriate amount of hydroxypropyl methylcellulose has a larger storage modulus and surface energy, which enables the film layer to better adhere to the surface of the bionic drag reduction swimsuit fabric. However, when it is excessive, it will cause the adhesion strength between the film layers to be too large and hinder the formation of the porous structure. In summary, sodium alginate and hydroxypropyl methylcellulose in ④ are selected to use 1 part and 6 parts respectively.

[0015] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0016] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for preparing a bionic drag-reducing swimsuit fabric, characterized in that: The invention comprises a preparation process, a bionic drag-reducing swimsuit fabric prepared by the preparation process, and a drag-reducing post-treatment process, wherein the bionic drag-reducing swimsuit fabric comprises a stacked woven structure and a connection structure, and the preparation process comprises the following steps: S1, bionic drag-reducing swimsuit fabric is woven with three kinds of yarns, namely PVA yarn, nylon-spandex core-spun yarn and polyester yarn, and is woven on a 14-needle double-needle bed flat knitting machine. The knitting yarn mouths are No. 1 yarn mouth and No. 6 yarn mouth. The No. 1 yarn mouth is threaded with polyester yarn, and the No. 6 yarn mouth is a double yarn mouth with upper and lower threading holes. The nylon-spandex core-spun yarn and PVA yarn are introduced from the same opening of the No. 6 yarn mouth and passed through the upper and lower openings of the No. 6 yarn mouth respectively. The number of knitting paths of the connection structure is 13, and the number of knitting paths of the stacked knitting structure is 15; S2, the bionic drag-reducing swimsuit fabric is firstly woven by weaving the connection structure, and then the stacked woven structure is woven. The connection structure and the stacked woven structure are woven alternately and cyclically. The connection structure does not fall off when it is woven to the previous row at the edge of the base fabric. The stacked woven structure uses the front needle bed and the rear needle bed to weave a 1+1 rib structure together. When weaving the stacked woven structure, the front needle bed and the rear needle bed separately weave the connection points between the stacked woven structures, and the lateral connection between adjacent stacked woven structures is connected to a horizontal row of coils of the connection structure that has not fallen off. S3, when the connection structure and the stacked braided structure of one horizontal row are woven as a cycle, the connection structure is woven again from the next horizontal row, and the connection structure of this cycle is interlaced with the coils of the connection structure of the previous cycle that have not been unhooked, and the coils of the connection structure of the previous cycle that have not been unhooked are completely connected with the coils of the connection structure of the next cycle by partial tucking, and the stacked braided structure is tightened to form a stacked structure after two adjacent longitudinal connection structures are connected by coils, and the coils of the connection structure are contracted to serve as the base fabric of the bionic drag-reducing swimsuit fabric; The prepared bionic drag-reducing swimsuit fabric is subjected to a drag-reducing post-treatment process, and the drag-reducing post-treatment process comprises the following steps: A1, prepare a drag-reducing finishing liquid according to the following parts by mass: put 10 parts of polyvinyl alcohol solid and 90 parts of distilled water into a magnetic stirring tank, and stir and mix them at a constant speed under magnetic stirring for 1 hour in a 75°C water bath to obtain a polyvinyl alcohol solution with a mass fraction of 10%, and add 0-3 parts of sodium alginate and 0-8 parts of hydroxypropyl methylcellulose during the stirring and mixing process; after the polyvinyl alcohol solution is allowed to stand and cool to room temperature, 0.1 parts of glutaraldehyde are added and stirred at a constant speed under magnetic stirring for 2 minutes; after the polyvinyl alcohol solution and glutaraldehyde are fully mixed, 1 part of 1.2 mol / L hydrochloric acid solution is added and stirred at a constant speed under magnetic stirring for 2 minutes to obtain a drag-reducing finishing liquid; A2, finishing of bionic drag reducing swimsuit fabric with drag reducing finishing liquid, adding 0.04 parts of photocuring agent 1173 to the drag reducing finishing liquid, immersing the bionic drag reducing swimsuit fabric in the drag reducing finishing liquid for 15 seconds, taking out the bionic drag reducing swimsuit fabric, and rolling the bionic drag reducing swimsuit fabric through a padding machine to obtain a bionic drag reducing swimsuit fabric with a liquid carrying rate of 70%, placing the rolled bionic drag reducing swimsuit fabric in an oven and drying it at 90°C for 5 minutes, and then exposing it to an ultraviolet lamp with a wavelength of 365nm and a power of 30W for 2 minutes to obtain the bionic drag reducing swimsuit fabric with drag reducing finishing.

2. The method for preparing a bionic drag-reducing swimsuit fabric according to claim 1, characterized in that: The sodium alginate and hypromellose are used in 1 part and 6 parts respectively.

3. The method for preparing a bionic drag-reducing swimsuit fabric according to claim 1, characterized in that: The bionic drag-reducing swimsuit has a horizontal knitting density and a vertical knitting density of 7.5 rows / cm and 11 columns / cm respectively, and a thread length of 9 cm / 50 stitches.

4. A method for preparing a bionic drag-reducing swimsuit fabric according to any one of claims 1 to 3, characterized in that: The stacked braided structure and the connection structure are combined on the bionic drag-reducing swimsuit fabric to form a three-dimensional structure in the shape of fish scales.

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