Preparation method of fishing braided wire capable of preventing marine organisms from adhering

Abstract

The invention relates to the field of fishing nettings, and particularly discloses a preparation method of a fishing braided wire for preventing marine organism adhesion. The preparation method of the fishing braided wire for preventing marine organism adhesion comprises the following steps: twisting ultra-high molecular weight polyethylene fibers into a wire as a core wire; teflon fibers are twisted into threads to serve as rubber-covered threads; braiding the core wire and the rubber-covered wire to obtain a braided wire semi-finished product; and shaping the braided wire semi-finished product by high-temperature treatment equipment to obtain the marine organism adhesion prevention fishing braided wire with a smooth and compact surface. The preparation method of the fishing braided wire for preventing the marine organisms from adhering has the advantage of reducing the fouling of the marine organisms to the netting.

Description

Technical Field

[0001] The present application relates to the field of fishing nets, and more specifically, to a method for preparing a fishing braided line that prevents marine organisms from attaching. Background Art

[0002] With the deepening of marine resource development, deep-sea aquaculture, as a key direction for the transformation and development of my country's marine aquaculture, is rapidly moving towards large-scale and large-scale development. This development trend is of great strategic significance for improving the economic benefits of aquaculture and ensuring the supply of aquatic products. However, in the practice of deep-sea aquaculture, the problem of marine biofouling has become a major bottleneck restricting the efficient and sustainable development of cage aquaculture.

[0003] There are a wide variety of organisms in the marine environment, such as algae, shellfish, barnacles and other fouling organisms. These organisms have a strong tendency to attach, and they will gradually gather and grow on the surface of the net of the cage. As the fouling organisms continue to accumulate, the mesh of the net is seriously blocked. This phenomenon directly hinders the normal exchange of nutrients between the water inside and outside the cage, making it impossible for the cultured organisms in the cage to obtain sufficient nutrition supply, and their growth and development are inhibited. Traditional methods to solve the problem of marine biofouling, such as regular manual cleaning of nets and the use of chemical antifouling coatings, have many limitations. Manual cleaning of nets requires a lot of manpower, material resources and time, and it is difficult to operate in the deep sea environment and is difficult to carry out frequently. Although chemical antifouling coatings can inhibit biological attachment to a certain extent, the harmful substances contained in them may leak into the marine environment, causing marine pollution and destroying the balance of the marine ecosystem. In addition, with the increasing environmental protection requirements, their use has been increasingly restricted.

[0004] Therefore, an efficient, environmentally friendly and durable fishing braided line for preventing marine organisms from attaching is developed to improve the current situation of deep-sea cage aquaculture. Summary of the invention

[0005] In order to reduce the contamination of nets by marine organisms, the present application provides a method for preparing a fishing braided line that prevents marine organism attachment.

[0006] The present application provides a method for preparing a fishing braided line that prevents marine organism attachment, which adopts the following technical solution: A method for preparing a fishing braided line that prevents marine organism attachment comprises the following steps: The ultra-high molecular weight polyethylene fiber is twisted into a twisted yarn as a core yarn; Twisting polytetrafluoroethylene fibers to make leather cords; The core wire and the skin wire are braided to obtain a braided wire semi-finished product; The semi-finished braided line is shaped by high-temperature treatment equipment to obtain a fishing braided line with a smooth and dense surface and anti-marine organism adhesion.

[0007] By adopting the above technical scheme, the core wire twisted with ultra-high molecular weight polyethylene fiber has extremely high strength and modulus, which can provide good mechanical support for the braided wire. After twisting into a twisted wire, the cohesion and friction between the fibers are further enhanced, making the core wire not easy to break and loose when subjected to tension. The leather wire twisted with polytetrafluoroethylene fiber plays a protective and wear-resistant role on the outside. Polytetrafluoroethylene fiber has good flexibility and wear resistance. The leather wire formed after twisting can effectively resist external effects such as seawater scouring, friction and scratching by marine organisms. At the same time, it can also protect the internal core wire from the direct influence of seawater erosion and biological fouling to a certain extent. Polytetrafluoroethylene fiber has extremely low surface energy, which makes its surface extremely hydrophobic and non-sticky. Substances such as mucus secreted by fouling organisms are difficult to spread and adhere to its surface, thereby fundamentally preventing the attachment process of fouling organisms on the surface of the leather wire. In addition, the chemical properties of polytetrafluoroethylene fiber are stable, and it is not easy to react chemically with substances in the marine environment, and can maintain its anti-fouling performance for a long time.

[0008] Optionally, the ultra-high molecular weight polyethylene twisted yarn has a linear density of 500-3200D and a twist of 10-40 twists / m.

[0009] By adopting the above technical solution, the wire density is set at 500-3200D and the twist is set at 10-40 twists / m. The appropriate wire density ensures that the core wire has sufficient mass and cross-sectional area to withstand external forces such as tension and pressure. In the cage farming environment, whether it is the impact of water flow, the activity and pulling of farmed organisms, or the daily operating stress, it can ensure the integrity of the braided wire structure and avoid breakage or damage due to insufficient strength, thereby ensuring the normal use of the cage and the safety of farmed organisms. During the weaving process, it can form a close and stable structural relationship with the leather wire, so that the anti-fouling properties of the leather wire can be fully utilized. If the wire density is too large or the twist is too high, the core wire may be too stiff during weaving, affecting the fit with the leather wire, causing unevenness or gaps on the surface of the braided wire, and increasing the chance of fouling organisms attaching; on the contrary, if the wire density is too small or the twist is too low, the core wire may be too loose and unable to provide sufficient support for the leather wire, which will also affect the overall anti-fouling effect and structural stability of the braided wire.

[0010] Optionally, the polytetrafluoroethylene twisted yarn has a linear density of 300-1000D and a twist of 30-50 twists / m.

[0011] By adopting the above technical solution, the line density is set at 300-1000D and the twist is set at 30-50 twists / meter, so that the polytetrafluoroethylene twisted wire can fully demonstrate its low surface energy characteristics after weaving. Its surface energy is extremely low, and it has strong hydrophobicity and non-stickiness. Such a parameter range helps to make its surface as flat, smooth and continuously exposed to the outside world as possible in the finished braided wire, without providing microstructures or rough surfaces that are easy for fouling organisms to attach, thereby greatly enhancing the ability to resist the attachment of marine fouling organisms. When braided with ultra-high molecular weight polyethylene twisted wire (core wire), this line density and twist range can make the polytetrafluoroethylene twisted wire and the core wire form a tight and stable braided structure. It will not be too loose to effectively combine with the core wire, affecting the overall strength and stability of the braided wire; nor will it be too rigid to cause stress concentration problems during the weaving process, destroying the uniformity and integrity of the braided wire.

[0012] Optionally, the heat treatment temperature is 300-360°C.

[0013] By adopting the above technical solution, the heat treatment at 300-360℃ makes the surface of the braided wire reach a highly smooth and dense state. This smooth surface greatly reduces the possibility of fouling organisms attaching, because fouling organisms usually need a certain degree of roughness or microstructure to attach and grow. After high-temperature treatment, the surface of the braided wire has almost no "focus points" for fouling organisms to attach. Its low surface energy characteristics combined with the smooth surface form a strong repulsive force for fouling organisms, which can effectively prevent algae, shellfish, barnacles and other marine fouling organisms from attaching and gathering on the braided wire, thereby keeping the mesh of the cage net unobstructed and ensuring the normal exchange of water inside and outside the cage.

[0014] Optionally, the ultra-high molecular weight polyethylene fiber is surface-modified by fluorosilane.

[0015] Optionally, the surface modification method of the ultra-high molecular weight polyethylene fiber is: The ultra-high molecular weight polyethylene fiber is subjected to plasma surface treatment to obtain a pretreated ultra-high molecular weight polyethylene fiber; The pretreated ultra-high molecular weight polyethylene fiber is added to an active reaction system for active monomer grafting to obtain a surface-modified ultra-high molecular weight polyethylene fiber, wherein the active reaction system comprises fluorosilane, an organic solvent and azobisisobutyronitrile; wherein the amount of fluorosilane is 2.5-3.5wt% of the organic solvent; and the amount of initiator is 0.5-1.5wt% of the organic solvent; The surface-modified ultra-high molecular weight polyethylene fibers are washed and dried.

[0016] By adopting the above technical scheme, fluorosilane has the characteristics of low surface energy. After surface modification, the surface of ultra-high molecular weight polyethylene fiber is endowed with this characteristic of fluorosilane. The hydrophilicity of the fiber surface is significantly reduced, and the hydrophobicity is greatly enhanced. In the marine environment, fouling organisms such as algae and shellfish usually rely on a certain degree of hydrophilic interaction with the surface of the object to achieve attachment. The modified fiber surface has enhanced hydrophobicity, which greatly reduces the interaction conditions required for the attachment of fouling organisms, thereby effectively inhibiting the attachment tendency of fouling organisms on the fiber surface. Fluorosilane and active monomers grafted on the fiber surface give ultra-high molecular weight polyethylene fibers a certain resistance to chemical corrosion. In the marine environment, seawater contains a variety of chemical substances, such as salt, pH changes and other factors that may cause corrosion to the fiber. After surface modification, the chemical protective layer on the fiber surface can resist the erosion of these chemical substances, extend the service life of the fiber, and ensure that it can still maintain good antifouling and mechanical properties under long-term exposure to the marine environment.

[0017] Optionally, polytetrafluoroethylene wax is attached to the surface of the polytetrafluoroethylene fiber.

[0018] Optionally, the method of attaching polytetrafluoroethylene wax to the surface of the polytetrafluoroethylene fiber is: The polytetrafluoroethylene fiber was surface treated with a potassium permanganate-sulfuric acid mixed solution; The polytetrafluoroethylene wax is heated until it is melted, and the liquid polytetrafluoroethylene wax is mixed with lauryl alcohol polyoxyethylene ether and water in a mass ratio of 50:(1-3):30, and a polytetrafluoroethylene wax emulsion is prepared by stirring; The surface treated polytetrafluoroethylene fiber is immersed in the polytetrafluoroethylene wax emulsion for 1-2 minutes, and the polytetrafluoroethylene fiber is taken out for drying and curing.

[0019] By adopting the above technical solution, polytetrafluoroethylene itself has extremely low surface energy and excellent non-stickiness, and after polytetrafluoroethylene wax is attached to its fiber surface, this non-stickiness is further enhanced. Polytetrafluoroethylene wax also has the characteristics of low surface energy. In the marine environment, substances such as mucus secreted by fouling organisms are difficult to adhere to this double low surface energy surface. When fouling organisms such as algae, shellfish, and barnacles try to attach to the surface of polytetrafluoroethylene fibers, due to the high non-stickiness of their surfaces, they cannot adhere firmly, thereby greatly reducing the probability of fouling organisms attaching to the fiber surface and effectively preventing biological fouling. In the marine environment, polytetrafluoroethylene fibers may be subject to external forces such as long-term scouring of water flow and friction from the activities of farmed organisms, and are prone to wear. After polytetrafluoroethylene wax is attached to the fiber surface, it plays a certain lubricating and protective role. When subjected to friction, the wax layer can withstand part of the friction, reducing the direct wear of the polytetrafluoroethylene fiber itself, thereby extending the service life of the polytetrafluoroethylene fiber.

[0020] In summary, this application has the following beneficial effects: 1. Since the core wire twisted with ultra-high molecular weight polyethylene fibers in this application provides high-strength mechanical support, enhances the fiber cohesion and friction to resist tensile breakage and loosening, the leather wire twisted with polytetrafluoroethylene fibers plays an external protective and wear-resistant role, resists seawater scouring, friction and biological scratches, and protects the core wire from seawater erosion and biological fouling. Its extremely low surface energy makes the leather wire highly hydrophobic and non-sticky, preventing the spread and adhesion of fouling biological mucus, fundamentally preventing fouling, and the chemical properties are stable to maintain anti-fouling properties for a long time. After weaving and high-temperature shaping treatment, a smooth and dense braided wire is obtained, which effectively solves the problem of marine biological fouling nets.

[0021] 2. In this application, the specific line density and twist range of ultra-high molecular weight polyethylene twisted wire are preferably used to provide sufficient external force bearing capacity for the braided wire, ensure the safety of the cages and aquaculture organisms, and facilitate tight and stable weaving with the leather wire, avoiding the impact of improper line density and twist on anti-fouling and structural stability; the corresponding line density and twist setting of the polytetrafluoroethylene twisted wire can fully demonstrate its low surface energy characteristics to enhance anti-fouling, and can form a tight and stable braided structure with the core wire, which not only prevents the looseness or stiffness of the wire from damaging the overall strength, stability and uniformity of the braided wire, but also synergistically improves the anti-fouling and structural performance of the braided wire.

[0022] 3. In the present application, it is preferred to modify the surface of ultra-high molecular weight polyethylene fibers with fluorosilane to reduce hydrophilicity and enhance hydrophobicity to inhibit the attachment of fouling organisms, and also to obtain chemical corrosion resistance to extend the service life; polytetrafluoroethylene wax is attached to the surface of polytetrafluoroethylene fibers to enhance the non-stickiness and reduce the probability of fouling organisms attaching, and the wax layer has a lubricating and protective effect to reduce wear and extend the life of the fiber. The two together enhance the anti-fouling and durability of fishing braided lines. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the examples. It is particularly noted that if no specific conditions are specified in the following examples, the experiments are carried out according to conventional conditions or the conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following examples can be obtained from common commercial sources.

[0024] Preparation example of surface modification of ultra-high molecular weight polyethylene fiber Preparation Example 1 Surface modification method of ultra-high molecular weight polyethylene fiber: The ultra-high molecular weight polyethylene fiber is placed in the reaction chamber of the plasma treatment equipment, and the reaction chamber is vacuumed to reduce the pressure in the chamber to 50Pa, and then argon gas is introduced, and the gas flow rate can be controlled at 40mL / min, and the plasma generator is turned on, and the power is adjusted to 350W, and the treatment time is 5 minutes. After the treatment is completed, the fiber is taken out and placed at room temperature and pressure for 30 minutes to stabilize the surface state, and the pretreated ultra-high molecular weight polyethylene fiber is obtained.

[0025] According to the ratio of 3wt% of fluorosilane to 1wt% of initiator azobisisobutyronitrile to the organic solvent, weigh fluorosilane, toluene and azobisisobutyronitrile, add the organic solvent to the reaction vessel, turn on the agitator, control the speed at 200 rpm, then add fluorosilane to the organic solvent, stir for 10 minutes to fully dissolve it, then add azobisisobutyronitrile to the solution, continue stirring for 5 minutes, until the initiator is completely dissolved, and form an active reaction system. Add the pretreated ultra-high molecular weight polyethylene fiber to the active reaction system, the fiber is added in an amount that can be fully immersed in the solution without affecting the stirring, then heat the reaction vessel to 80°C, and the reaction time is 2 hours.

[0026] After the grafting reaction is completed, the ultra-high molecular weight polyethylene fiber after the reaction is taken out, and the fiber is repeatedly rinsed with toluene, and then rinsed with deionized water. The washed ultra-high molecular weight polyethylene fiber is placed in a vacuum drying oven for drying. The drying temperature is set at 50°C and dried for 12 hours to obtain the surface-modified ultra-high molecular weight polyethylene fiber.

[0027] Preparation Example 2 Surface modification method of ultra-high molecular weight polyethylene fiber: The difference from Preparation Example 1 is that the amount of fluorosilane used is 2.5 wt % of the organic solvent.

[0028] Preparation Example 3 Surface modification method of ultra-high molecular weight polyethylene fiber: The difference from Preparation Example 1 is that the amount of fluorosilane used is 3.5 wt % of the organic solvent.

[0029] Preparation example of polytetrafluoroethylene wax attached to the surface of polytetrafluoroethylene fiber Preparation Example 4 The method of attaching polytetrafluoroethylene wax to the surface of polytetrafluoroethylene fiber is: Prepare a potassium permanganate-sulfuric acid mixed solution with a potassium permanganate concentration of 4 mol / L and a sulfuric acid concentration of 6 mol / L, and stir well.

[0030] The polytetrafluoroethylene fiber is completely immersed in the potassium permanganate-sulfuric acid mixed solution for 5 minutes. After the immersion is completed, the polytetrafluoroethylene fiber is taken out from the solution and repeatedly rinsed with a large amount of clean water until the rinsed water is no longer acidic, and then the washed fiber is dried at 60°C to make the fiber reach a water-free state.

[0031] Place the polytetrafluoroethylene wax in a heating container and slowly heat it above its melting point to completely dissolve it into a liquid state. Weigh the liquid polytetrafluoroethylene wax, lauryl alcohol polyoxyethylene ether and deionized water in a mass ratio of 50:2:30, mix them in a clean container, stir evenly, and form a stable polytetrafluoroethylene wax emulsion.

[0032] The polytetrafluoroethylene fiber was immersed in the prepared polytetrafluoroethylene wax emulsion for 1.5 minutes. After the immersion was completed, the polytetrafluoroethylene fiber was taken out from the wax emulsion using a clamp, and the taken-out fiber was immediately placed in a ventilated environment at 80°C for drying and curing for 90 minutes.

[0033] Preparation Example 5 The method for attaching polytetrafluoroethylene wax to the surface of polytetrafluoroethylene fiber is as follows: the difference from Preparation Example 4 is that liquid polytetrafluoroethylene wax, lauryl alcohol polyoxyethylene ether and deionized water are weighed in sequence according to a mass ratio of 50:1:30, mixed in a clean container, stirred evenly, and formed a stable polytetrafluoroethylene wax emulsion.

[0034] Preparation Example 6 The method for attaching polytetrafluoroethylene wax to the surface of polytetrafluoroethylene fiber is as follows: the difference from Preparation Example 4 is that liquid polytetrafluoroethylene wax, lauryl alcohol polyoxyethylene ether and deionized water are weighed in sequence according to a mass ratio of 50:3:30, mixed in a clean container, stirred evenly, and formed a stable polytetrafluoroethylene wax emulsion. Example

[0035] Example 1 A method for preparing a fishing braided line that prevents marine organism attachment: Select ultra-high molecular weight polyethylene fiber with a molecular weight of 4 million and a linear density of 2000D. Place the ultra-high molecular weight polyethylene fiber bundle on the creel of the twisting device, adjust the parameters of the twisting device, and set the twist to 25 twists / m. Turn on the twisting device to twist the fiber in the twisting device according to the set twist.

[0036] A polytetrafluoroethylene fiber with a linear density of 650D is selected. The polytetrafluoroethylene fiber is made by a film splitting method and is placed on a yarn rack of another twisting device. The twist of the twisting device is adjusted to 40 twists / m, and the twisting device is started to perform a twisting operation on the polytetrafluoroethylene fiber.

[0037] Install the bobbins with the ultra-high molecular weight polyethylene core wire and the polytetrafluoroethylene sheath wire on the corresponding positions of the braiding machine, start the braiding machine, and use the twill braiding method to braid the sheath wire on the outer surface of the core wire. After the braiding is completed, remove the braided wire semi-finished product from the braiding machine.

[0038] The semi-finished braided wire is sent into the heating chamber of the high-temperature treatment equipment, the heat treatment temperature is set to 330°C, and the heat is kept for 10 minutes. After the high-temperature treatment, the braided wire is taken out of the heating chamber and placed in a natural environment to cool to room temperature.

[0039] Example 2 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that the ultra-high molecular weight polyethylene fiber line density is 500D.

[0040] Example 3 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that the ultra-high molecular weight polyethylene fiber line density is 3200D.

[0041] Example 4 A method for preparing a fishing braided line that prevents marine organism attachment: The difference from Example 1 is that the twist degree of the ultra-high molecular weight polyethylene fiber is 10 twists / meter.

[0042] Example 5 A method for preparing a fishing braided line that prevents marine organism attachment: The difference from Example 1 is that the twist degree of the ultra-high molecular weight polyethylene fiber is 40 twists / m.

[0043] Example 6 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that the density of the polytetrafluoroethylene twisted line is 300D.

[0044] Example 7 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that the density of the polytetrafluoroethylene twisted line is 1000D.

[0045] Example 8 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that the twist degree of the polytetrafluoroethylene twisted line is 30 twists / meter.

[0046] Example 9 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that the twist degree of the polytetrafluoroethylene twisted line is 50 twists / meter.

[0047] Example 10 A method for preparing a fishing braided line that prevents marine organisms from attaching: the difference from Example 1 is that the heat treatment temperature is 300°C.

[0048] Embodiment 11 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that the heat treatment temperature is 360°C.

[0049] Example 12 A method for preparing a fishing braided line that prevents marine organisms from attaching: The difference from Example 1 is that the ultra-high molecular weight polyethylene fiber is surface-modified by fluorosilane and is prepared by Preparation Example 1.

[0050] Example 13 A method for preparing a fishing braided line that is resistant to marine biological attachment: The difference from Example 12 is that the ultra-high molecular weight polyethylene fiber is surface-modified by fluorosilane and is prepared by Preparation Example 2.

[0051] Embodiment 14 A method for preparing a fishing braided line that is resistant to marine biological attachment: The difference from Example 12 is that the ultra-high molecular weight polyethylene fiber is surface-modified by fluorosilane and is prepared by Preparation Example 3.

[0052] Embodiment 15 A method for preparing a fishing braided line that is resistant to marine organism attachment: the difference from Example 1 is that polytetrafluoroethylene wax is attached to the surface of the polytetrafluoroethylene fiber, which is prepared by Preparation Example 4.

[0053] Example 16 A method for preparing a fishing braided line that is resistant to marine biological attachment: the difference from Example 15 is that polytetrafluoroethylene wax is attached to the surface of the polytetrafluoroethylene fiber, which is prepared by Preparation Example 5.

[0054] Embodiment 17 A method for preparing a fishing braided line that is resistant to marine biological attachment: the difference from Example 15 is that polytetrafluoroethylene wax is attached to the surface of the polytetrafluoroethylene fiber, which is prepared by Preparation Example 6.

[0055] Comparative Example Comparative Example 1 A method for preparing a fishing braided line that prevents marine organism attachment: The difference from Example 1 is that ultra-high molecular weight polyethylene fibers are twisted into twisted yarns and braided to obtain a braided line semi-finished product.

[0056] Comparative Example 2 A method for preparing a fishing braided line that prevents marine organism attachment: The difference from Example 1 is that polytetrafluoroethylene fibers are twisted into twisted yarns and braided to obtain a braided line semi-finished product.

[0057] Comparative Example 3 A method for preparing a fishing braided line that prevents marine organism attachment: the difference from Example 1 is that no high-temperature treatment is performed.

[0058] Performance testing Detection Methods The braided wires obtained in the embodiment and the comparative example were respectively woven into nets of the same specification and effective area, placed in the same marine aquaculture area, fixed on the aquaculture facilities, taken out and dried and weighed at the 3rd and 6th months respectively, and the weight change of the nets in the dry state reflected the ability to prevent the attachment of marine organisms, and the nets were observed to see whether they were damaged or broken.

[0059] Table 1 Combining Example 1 and Comparative Examples 1-3 and the table, it can be seen that Comparative Example 1 only twists the ultra-high molecular weight polyethylene fiber into a twisted yarn to obtain a braided wire semi-finished product, which lacks the protection and synergistic anti-fouling effect of the polytetrafluoroethylene fiber sheath wire. Example 1 adopts the method of combining ultra-high molecular weight polyethylene fiber core wire with polytetrafluoroethylene fiber sheath wire. The polytetrafluoroethylene fiber sheath wire has extremely low surface energy, strong hydrophobicity and non-stickiness, which can effectively prevent fouling organisms from attaching to the surface of the braided wire and fundamentally prevent biological fouling. At the same time, the sheath wire can also play a protective and wear-resistant role on the outside, resist seawater scouring, friction, and scratches by marine organisms, etc., and protect the internal core wire from the direct effects of seawater erosion and biological fouling. The synergistic effect of the two significantly improves the overall anti-fouling performance and durability of the braided wire, and can better maintain the structural integrity of the braided wire and adapt to the complex external forces in the marine environment. Comparative Example 2 only uses polytetrafluoroethylene fibers twisted into twisted yarn for weaving. The core wire twisted with ultra-high molecular weight polyethylene fiber has extremely high strength and modulus, which can provide good mechanical support for the braided wire and is not easy to break or loose when subjected to tension. The combination of the core wire and the skin wire in Example 1 not only ensures that the braided wire has sufficient mechanical strength to cope with external forces such as water flow impact and the pulling of farmed organisms, but also achieves anti-fouling with the help of the special properties of the skin wire, so that the braided wire achieves a better balance between mechanical properties and anti-fouling properties, and has better comprehensive performance. Compared with Comparative Example 2, it can more effectively ensure the long-term stable use of the cage in the marine environment and the safety of farmed organisms. Comparative Example 3 does not undergo high-temperature treatment. The high-temperature treatment step in Example 1 keeps the braided wire semi-finished product at 330°C for 10 minutes. This process can make the structure of the core wire and the skin wire more stable, further fuse the fibers, and make the surface of the braided wire smooth and dense. High-temperature treatment promotes the interaction between fibers and enhances the integrity of the braided wire, so that it is not easy to have problems such as loose fibers and deformation during long-term use, and the structural stability is better. At the same time, the smooth and dense surface further reduces the possibility of fouling organisms attaching, and helps to maintain the stability of the surface performance of the braided line, extending its anti-fouling effectiveness period. Compared with comparative example 3, it can maintain a good anti-fouling effect for a longer period of time, reduce the frequency of cage maintenance and replacement due to biological fouling, and reduce breeding costs.

[0060] In combination with Examples 1-11 and Table 1, it can be seen that the line density of the ultra-high molecular weight polyethylene twisted wire is 500-3200D and the twist is 10-40 twists / m, which can ensure that the core wire withstands various external forces to maintain the integrity of the braided wire structure, ensure the safety of the cage and the cultured organisms, and is conducive to building a good braided structure with the leather wire to exert the anti-fouling properties; the line density of the polytetrafluoroethylene twisted wire is 300-1000D and the twist is 30-50 twists / m, which can fully demonstrate the low surface energy characteristics, enhance the anti-fouling ability, and form a tight and stable braided structure with the core wire; and the heat treatment of 300-360°C makes the surface of the braided wire smooth and dense, reduces the possibility of attachment of fouling organisms, and forms a strong repulsive force with the low surface energy and the smooth surface to prevent the attachment and aggregation of marine fouling organisms, ensuring that the mesh of the cage net is unobstructed and normally exchanged with the water body.

[0061] Combining Example 1 with Examples 12-17 and Table 1, it can be seen that by surface modification of ultra-high molecular weight polyethylene fibers with fluorosilane, the hydrophilicity is reduced and the hydrophobicity is enhanced to inhibit the attachment of fouling organisms, and the chemical corrosion resistance is obtained to extend the service life; polytetrafluoroethylene wax is attached to the surface of the polytetrafluoroethylene fiber to enhance the non-stickiness and reduce the probability of fouling organisms attaching, and the wax layer has a lubricating and protective effect to reduce wear and extend the life of the fiber. The two together improve the anti-fouling and durability of fishing braided lines.

[0062] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A method for preparing a fishing braided line that prevents marine organism attachment, characterized in that: The following steps are involved: The ultra-high molecular weight polyethylene fibers are twisted into threads to serve as core threads; Twisting polytetrafluoroethylene fibers into threads to serve as leather threads; The core wire and the skin wire are braided to obtain a braided wire semi-finished product; The semi-finished braided line is shaped by high-temperature treatment equipment to obtain a fishing braided line with a smooth and dense surface and anti-marine organism adhesion.

2. The method for preparing a fishing braided line to prevent marine organism attachment according to claim 1, characterized in that: The ultra-high molecular weight polyethylene twisted yarn has a linear density of 500-3200D and a twist degree of 10-40 twists / m.

3. The method for preparing a fishing braided line that prevents marine organism attachment according to claim 1, characterized in that: The polytetrafluoroethylene twisted yarn has a linear density of 300-1000D and a twist degree of 30-50 twists / m.

4. The method for preparing a fishing braided line to prevent marine organism attachment according to claim 1, characterized in that: The heat treatment temperature is 300-360°C.

5. The method for preparing a fishing braided line that prevents marine organism attachment according to claim 1, characterized in that: The ultra-high molecular weight polyethylene fiber is surface-modified by fluorosilane.

6. The method for preparing a fishing braided line to prevent marine organism attachment according to claim 5, characterized in that: The surface modification method of the ultra-high molecular weight polyethylene fiber is: The ultra-high molecular weight polyethylene fiber is subjected to plasma surface treatment to obtain a pretreated ultra-high molecular weight polyethylene fiber; The pretreated ultra-high molecular weight polyethylene fiber is added to an active reaction system for active monomer grafting to obtain a surface-modified ultra-high molecular weight polyethylene fiber, wherein the active reaction system comprises fluorosilane, an organic solvent and azobisisobutyronitrile; wherein the amount of fluorosilane is 2.5-3.5wt% of the organic solvent; and the amount of initiator is 0.5-1.5wt% of the organic solvent; The surface-modified ultra-high molecular weight polyethylene fibers are washed and dried.

7. The method for preparing a fishing braided line that prevents marine organism attachment according to claim 1, characterized in that: Polytetrafluoroethylene wax is attached to the surface of the polytetrafluoroethylene fiber.

8. The method for preparing a fishing braided line that prevents marine organism attachment according to claim 7, characterized in that: The method for attaching polytetrafluoroethylene wax to the surface of the polytetrafluoroethylene fiber is: The polytetrafluoroethylene fiber was surface treated with a potassium permanganate-sulfuric acid mixed solution; The polytetrafluoroethylene wax is heated until it is melted, and the liquid polytetrafluoroethylene wax is mixed with lauryl alcohol polyoxyethylene ether and water in a mass ratio of 50:(1-3):30, and a polytetrafluoroethylene wax emulsion is prepared by stirring; The surface treated polytetrafluoroethylene fiber is immersed in the polytetrafluoroethylene wax emulsion for 1-2 minutes, and the polytetrafluoroethylene fiber is taken out for drying and curing.

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