Waterproof fishing line and preparation method thereof

Abstract

The invention discloses a waterproof fishing line and a preparation method thereof. The preparation method comprises the following steps: (1) taking a low-melting-point nylon filament as an inner core, and weaving an outer layer by adopting ultra-high molecular weight polyethylene fibers to obtain a fishing line; the melting point of the low-melting-point nylon filaments is 80-100 DEG C; (2) the fishing line prepared in the step (1) is subjected to heating forming treatment, wherein the fishing line sequentially passes through a first traction machine, a first drying oven and a second traction machine; the temperature in the first drying oven is 90-100 DEG C; the roller speed of the first traction machine is 140 to 160 m / min; and the barrel speed of the second traction machine is 320-360 / min. According to the preparation method, an embedded waterproof structure is formed in the braided wire, meanwhile, the problem of looseness of the braided wire is reduced, and the overall strength is improved.

Description

Technical Field

[0001] This invention relates to the field of fishing line preparation, and particularly to a waterproof fishing line and its preparation method. Background Technology

[0002] The water absorption problem of braided fishing lines has always been a major issue affecting the user experience. It indirectly leads to a series of problems such as reduced casting distance, thicker lines, decreased tensile strength, and fading. In winter, it can even cause the fishing line to freeze, greatly reducing the fishing experience. PE material itself has very low water absorption; the main reason for water absorption is that its structure creates numerous gaps during use, forming water accumulation points. Summary of the Invention

[0003] To overcome the aforementioned limitations and shortcomings of the existing technology, the present invention aims to provide a method for preparing waterproof fishing line. During the heat-forming process, the low-melting-point nylon filaments of the inner core deform due to heat. Simultaneously, the speed difference between the two drawing machines creates a forward drawing force, causing each fiber to tighten and converge inwards during heating, compressing the already deformed inner core nylon filaments. Under this force, the inner core shape transforms into a completely interlocking, dendritic, dispersed structure within the braided line. This structure not only completely eliminates air from the braided structure and occupies space to prevent moisture from entering during use, forming an interlocking waterproof structure within the braided line, but also reduces the occurrence of braid loosening and improves overall strength.

[0004] Another objective of this invention is to provide a waterproof fishing line prepared by the above-described method.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] This invention provides a method for preparing a waterproof fishing line, comprising the following steps:

[0007] (1) A fishing line is made by using low-melting-point nylon filament as the inner core and ultra-high molecular weight polyethylene fiber to weave the outer layer; the melting point of the low-melting-point nylon filament is 80-100 degrees Celsius.

[0008] (2) The fishing line prepared in step (1) is subjected to heat forming treatment:

[0009] The fishing line is passed sequentially through the first traction machine, the first drying oven, and the second traction machine;

[0010] The temperature inside the first oven is 90-100 degrees Celsius;

[0011] The roller speed of the first traction machine is 140-160 m / min;

[0012] The roller speed of the second traction machine is 320-360 / minute.

[0013] Preferably, the volume percentage of low-melting-point nylon filaments in the fishing line is 20%-27%.

[0014] Preferably, the preparation of the low-melting-point nylon filament includes the following steps:

[0015] The raw materials for preparing low-melting-point nylon filaments are mixed in a drying mixer to reduce the moisture content to below 0.05 wt%, and then poured into an extruder for spinning through a twin-screw extruder to obtain filaments. The filaments are then passed through a second drying oven, a third drawing machine, a third drying oven, a fourth drawing machine, a fourth drying oven, a fifth drawing machine, and finally wound up.

[0016] The temperature of the second oven is 80-90℃, the temperature of the third oven is 60-70℃, the temperature of the fourth oven is 100-110℃, the roller speed of the third drawing machine is 1600-1700m / min, the roller speed of the fourth drawing machine is 2800-3000m / min, and the roller speed of the fifth drawing machine is 3300-3500m / min.

[0017] Preferably, the raw materials for preparing low-melting-point nylon filaments include:

[0018] 100 portions of low-melting-point nylon chips

[0019] 8-12 parts of hydrophobically modified nano-silica

[0020] 3-5 parts of maleic anhydride-grafted polyolefin

[0021] Polycaprolactone 4-6 parts.

[0022] Preferably, the low-melting-point nylon filament raw material further includes UV stabilizers and / or antioxidants.

[0023] Preferably, the components of the low-melting-point nylon chips include:

[0024] PA6 100 copies

[0025] PA12 35-45 servings

[0026] Sebacic acid 8-12 parts

[0027] 25-35 parts polycarbonate.

[0028] Preferably, the temperature in the drying mixer is 60-80°C.

[0029] Preferably, the spinning temperature is 220-240℃.

[0030] Preferably, the outer layer woven with ultra-high molecular weight polyethylene fiber in step (1) is specifically as follows:

[0031] The outer layer is woven using eight 110dtex ultra-high molecular weight polyethylene fibers, resulting in 10 weaving nodes per centimeter.

[0032] The present invention also provides a waterproof fishing line, which is prepared by the method described above.

[0033] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0034] (1) In the method for preparing the waterproof fishing line of the present invention, during the heat forming process, the low-melting-point nylon filament of the inner core deforms due to heat. At the same time, due to the speed difference between the two drawing machines, a forward drawing force is formed, causing each fiber to tighten and move inward during the heating process, compressing the deformed inner core nylon filament. Under this force, the shape of the inner core is transformed into a tree-like dispersed structure that is completely embedded inside the braided line. This structure not only completely removes air from the braided structure but also occupies space to prevent moisture from entering during use. At the same time, the adhesiveness of the material reduces the possibility of the structure disintegrating.

[0035] (2) The method for preparing the waterproof fishing line of the present invention optimizes the raw materials and preparation process of low melting point nylon filaments so that the cored line can also play a certain role in the final product, including reducing water absorption, increasing strength and increasing coagulation strength.

[0036] (3) In the preparation method of the waterproof fishing line of the present invention, during the weaving of the outer layer, eight 110 dtex ultra-high molecular weight polyethylene fibers are woven together as the main structure. In order to ensure the tightness of the weaving of the fishing line itself, three gears of type 22 / 22 / 42 are used here, and finally a fishing line with 10 weaving nodes per centimeter can be obtained. This tightness of weaving can reduce the entry of water, and at the same time, it will play a more dense skeleton structure in subsequent processing, and the internal melted nylon material will adhere more closely to the external structure. Attached Figure Description

[0037] Figure 1 This is a structural diagram of the equipment used to prepare low-melting-point nylon filaments in Example 1 of the present invention.

[0038] Figure 2 This is a structural diagram of the equipment used for heat forming in Embodiment 1 of the present invention.

[0039] Figure 3 This is a schematic diagram of using upper and lower scrapers to scrape off excess nylon material from the surface of the fishing line in Embodiment 2 of the present invention.

[0040] Figure 4 This is a schematic diagram of using a funnel scraper with a corresponding aperture to scrape off excess nylon material from the surface of the fishing line in Embodiment 2 of the present invention.

[0041] Figure 5 This is a schematic diagram illustrating the hardness test performed on samples A, B, and C in an embodiment of the present invention. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0043] Example 1

[0044] This embodiment provides a method for preparing a waterproof fishing line, including the following steps:

[0045] (1) A fishing line is made by using low-melting-point nylon filament as the inner core and ultra-high molecular weight polyethylene fiber to weave the outer layer; the melting point of the low-melting-point nylon filament is 80-100 degrees Celsius.

[0046] (1-1) Preparation of low-melting-point nylon filaments:

[0047] For low-melting-point nylon filaments, commercially available low-melting-point nylon products can be purchased directly without special requirements. In this embodiment, to ensure that the cored yarn also plays a role in the final product, including reducing water absorption, increasing strength, and increasing coagulation strength, this embodiment optimizes the materials and preparation processes for all low-melting-point nylon filaments:

[0048] First, low-melting-point nylon chips are copolymerized and granulated using the following formulation:

[0049] PA12 40 servings

[0050] PA6 100 copies

[0051] 10 parts sebacic acid

[0052] 30 parts polycarbonate

[0053] PA12 and PA6 are the main raw materials for low-melting-point nylon yarn, responsible for the product's strength and other properties.

[0054] Sebacic acid is responsible for disrupting the regularity of the molecular chain, significantly reducing the melting point to the target 80-100 degrees Celsius. Other long-chain aliphatic monomers can also be used instead. Polycarbonate can reduce the coefficient of linear expansion and improve hydrophobicity in the whole system. In addition, we can also add commonly used flow aids to help the finished product be molded and produced.

[0055] Next, we mix the low-melting-point nylon chips with other materials and extrude them to produce continuous low-melting-point nylon filaments. The raw materials for preparing low-melting-point nylon filaments include the following components:

[0056] 100 portions of low-melting-point nylon chips

[0057] 10 parts of hydrophobically modified nano-silica

[0058] Exxelor™ VA1803 4 servings

[0059] 5 parts of polycaprolactone

[0060] Among them, Exxelor™ VA1803 is a type of maleic anhydride-grafted polyolefin. As a compatibilizer, it improves the interfacial bonding between nylon and polyolefin, lowers the overall melting point and enhances fluidity, making it easier for the product to deform during subsequent heat setting.

[0061] Polycaprolactone is a type of polyester-based plasticizer that can reduce the elastic modulus, improve flexibility, and allow extruded low-melting-point nylon filaments to adhere more closely to ultra-high molecular weight polyethylene fibers during the weaving process.

[0062] In addition to these materials, additives such as UV stabilizers or antioxidants can be added to further improve the physical properties of the final product.

[0063] All raw materials for preparing low-melting-point nylon filaments were mixed in a drying mixer at 60-80°C to reduce the moisture content to below 0.05 wt%, and then fed into extruder 1 for spinning via a twin-screw extruder (temperature 220-240°C). The spinneret orifice diameter used can range from 0.4 mm to 1.4 mm. In this example, the goal is to obtain a continuous filament of 0.128 mm, so a 0.6 mm spinneret orifice diameter fitting is used.

[0064] The filament then passes through the second drying oven 2, the third drawing machine 3, the third drying oven 4, the fourth drawing machine 5, the fourth drying oven 6, and the fifth drawing machine 7 in sequence, and is finally wound up.

[0065] The temperature of the second oven is 80-90℃, the temperature of the third oven is 60-70℃, the temperature of the fourth oven is 100-110℃, the roller speed of the third drawing machine is 1600-1700m / min, the roller speed of the fourth drawing machine is 2800-3000m / min, and the roller speed of the fifth drawing machine is 3300-3500m / min.

[0066] During the spinning process, the temperature is increased by an oven, and the rollers provide friction to stretch the nascent fibers by 1.5 times and 3 times respectively under stable temperature conditions. The fibers are then set in a high-temperature oven to maintain stability and eliminate elasticity. Finally, the filament diameter is controlled at about 0.128 mm before winding to obtain low-melting-point nylon filaments with a fineness of approximately 140 dtex.

[0067] (1-2) Outer layer weave:

[0068] When producing fiber filaments, either a single fiber filament or a combination of two fibers can be used. In this process, common multi-strand braiding machines (such as 4-strand, 8-strand, 12-strand, and 16-strand braiding machines) are used to complete the production task. Here, we use the most common 8-strand structure on the market. After conducting water absorption tests on several different models of 8-strand braided fishing lines, the water absorption rate of commonly used braided fishing lines is approximately 10%-15%. Furthermore, considering the 8-strand braid structure itself, the estimated hollow volume in the middle is approximately 6%-14%.

[0069] In this embodiment, eight 110 dtex ultra-high molecular weight polyethylene fibers are woven together as the main structure. A 0.128 mm low-melting-point nylon filament is wrapped around the middle.

[0070] The braiding machine used here is a common model on the market. To ensure the tightness of the braid, three gear models (22 / 22 / 42) are used, resulting in a fishing line with 10 braided knots per centimeter. This tightness reduces water ingress and creates a denser skeleton structure during subsequent processing, allowing the melted nylon material inside to adhere more closely to the external structure.

[0071] (2) The fishing line prepared in step (1) is subjected to heat forming treatment:

[0072] The fishing line is passed sequentially through the first traction machine, the first drying oven, and the second traction machine;

[0073] The temperature inside the first oven is 90-100 degrees Celsius;

[0074] The roller speed of the first traction machine is 140-160 m / min;

[0075] The drum speed of the second traction machine is 320-360 / minute.

[0076] This stage is the most important step. On the one hand, it requires maintaining a stable output temperature of 90-100 degrees Celsius in a high-temperature oven to deform the low-melting-point nylon filaments in the core.

[0077] Simultaneously, a drawing machine needs to be placed on each side of the high-temperature oven. The rollers of the drawing machine before heating are adjusted to a speed of 150 m / min. The rollers of the drawing machine after heating are adjusted to a speed of 345 m / min. Utilizing the speed difference between the two drawing machines, a forward drawing force is generated, causing each fiber to tighten and converge inward during the heating process, compressing the already deformed inner core nylon filament. Under this force, the inner core shape transforms into a tree-like dispersed structure that is completely embedded within the braided yarn. This structure not only completely expels air from the braided structure and occupies space to prevent moisture from entering during use, but also reduces the possibility of the structure unraveling due to the material's adhesiveness, enhancing density and improving tensile strength and water-cutting performance.

[0078] Ordinary fishing line that has not undergone steps (1) and (2) and fishing line that has only undergone step (1) were compared with the waterproof fishing line product prepared by steps (1) and (2) (hereinafter referred to as the waterproof fishing line of the present invention) for water absorption rate and sinking performance. The results are as follows:

[0079] Water absorption test: Take 1 meter of fishing line and immerse it in water for 10 minutes. The average weight of 1 meter of ordinary fishing line without processing steps (1) and (2) is 0.092 grams. After immersion in water and wiping off the water droplets on the surface, the weight of the line is 0.106 grams. The internal water absorption is about 0.014 grams, and the water absorption rate is about 15.22%.

[0080] The fishing line that has only undergone step (1) weighs an average of 0.100 grams per meter. After soaking in water and wiping away the remaining water droplets on the surface, the line weighs 0.106 grams, and the internal water absorption is about 0.017 grams, with a water absorption rate of about 17%. The shape of the internal core expands the braided structure without filling the gaps, resulting in a higher water absorption rate.

[0081] The waterproof fishing line prepared in steps (1) and (2) has an average weight of 0.102 grams per meter. This indicates that the internal core line increases in weight by 0.01 grams per meter after its shape stabilizes. After a 10-minute immersion test, the surface water droplets were wiped off, and the weight was 0.106 grams, with an internal water absorption of 0.004 grams and a water absorption rate of 4.25%.

[0082] The waterproof fishing line obtained in this embodiment can be further dyed and coated to achieve a breakthrough in water-resistant functionality while ensuring normal performance.

[0083] Example 2

[0084] The composition and preparation process of the low-melting-point nylon filament in this embodiment are the same as in Example 1. The outer layer weaving process of the fishing line is as follows:

[0085] It is woven with 8 110dtex ultra-high molecular weight polyethylene fibers, and the internal core wire accounts for 20%-27% of the volume.

[0086] The heat forming process in this embodiment is the same as that in Embodiment 1.

[0087] In this embodiment, since the internal core wire accounts for 20%-27% of the volume, during the heating process, excess inner core nylon material deforms and is squeezed out of the inner layer by the inward compression of the outer braided structure, solidifying into granular solids upon cooling on the surface. Before the granules solidify, upper and lower scrapers 11 or funnel scrapers 12 with corresponding apertures are used to scrape away excess nylon material from the surface of the product after shaping, creating a thin resin layer covering the outside of the braided wire. The process is as follows: Figure 3 or Figure 4 As shown.

[0088] The product manufactured in this embodiment is not only waterproof internally, but its overall external structure also reduces water ingress and significantly improves the abrasion resistance of the fishing line. However, the disadvantage is that the fishing line produced in this way is harder.

[0089] Experimental comparison:

[0090] Sample A: 8 110dtex braided yarns that were not processed in steps (1) and (2);

[0091] Sample B: 8 strands of 110dtex braided yarn + 0.128mm low-melting-point nylon processed in Example 1;

[0092] Sample C: 8 strands of 110dtex braided yarn + 0.128mm low-melting-point nylon processed in Example 2;

[0093] Tensile strength test: Three braided yarns with different production structures were subjected to an abrasion test under a 100g weight and passed through a 120-grit abrasive wheel. The number of friction cycles until breakage was recorded. Each experimental group underwent 50 friction tests, and the average value was measured and the CV value was calculated. In addition, three different braided yarns were selected for tensile strength tests. Each group underwent 100 tensile tests, and the average value was measured and the CV value was calculated, as shown in Table 1.

[0094] Table 1

[0095] Product Model Average number of friction fractures CV% Sample A 233 15.89 Sample B 120 8.17 Sample C 450 5.07

[0096] Abrasion resistance test:

[0097] Because the ordinary 8-strand braided yarn (sample A) is hollow, the force is applied to the entire surface during friction, resulting in a larger force-bearing area and better wear resistance. Sample B, after being coated with low-melting-point nylon monofilament and processed as in Example 1, has a three-dimensional cylindrical shape, resulting in a smaller force-bearing area during friction and consequently lower wear resistance. However, during the experiment, excess resin in sample C was extruded and formed a new coating on the surface, significantly improving its wear resistance.

[0098] Hardness test: Observe the angle of fiber lifting when lifted with the same force.

[0099] Take samples A, B, and C, each 10cm in length. Keep them perpendicular, then lift each fiber horizontally from the top 1cm. Record their deformed shapes and measure the initial cut angle. Figure 5 As shown.

[0100] Sample A51 is the softest and sags the most, with an initial cut angle of 32 degrees; Sample B52 has increased in hardness, with the initial cut angle reduced to 15 degrees, and sags more noticeably at the rear end; Sample C53 has a very high increase in hardness, basically remains horizontal, and has no sag, so the initial cut angle is 0 degrees, and it has the highest hardness.

[0101] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments described above. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for preparing a waterproof fishing line, characterized in that, Includes the following steps: (1) A fishing line is made by using low-melting-point nylon filament as the inner core and ultra-high molecular weight polyethylene fiber to weave the outer layer; the melting point of the low-melting-point nylon filament is 80-100 degrees Celsius. (2) The fishing line prepared in step (1) is subjected to heat forming treatment: The fishing line is passed sequentially through the first traction machine, the first drying oven, and the second traction machine; The temperature inside the first oven is 90-100 degrees Celsius; The roller speed of the first traction machine is 140-160 m / min; The roller speed of the second traction machine is 320-360 / minute.

2. The method for preparing waterproof fishing line according to claim 1, characterized in that, In the fishing line, the volume percentage of low-melting-point nylon filaments is 20%-27%.

3. The method for preparing waterproof fishing line according to claim 1, characterized in that, The preparation of the low-melting-point nylon filament includes the following steps: The raw materials for preparing low-melting-point nylon filaments are mixed in a drying mixer to reduce the moisture content to below 0.05 wt%, and then poured into an extruder for spinning through a twin-screw extruder to obtain filaments. The filaments are then passed through a second drying oven, a third drawing machine, a third drying oven, a fourth drawing machine, a fourth drying oven, a fifth drawing machine, and finally wound up. The temperature of the second oven is 80-90℃, the temperature of the third oven is 60-70℃, the temperature of the fourth oven is 100-110℃, the roller speed of the third drawing machine is 1600-1700m / min, the roller speed of the fourth drawing machine is 2800-3000m / min, and the roller speed of the fifth drawing machine is 3300-3500m / min.

4. The method for preparing waterproof fishing line according to claim 3, characterized in that, The raw materials for preparing low-melting-point nylon filaments include: 100 portions of low-melting-point nylon chips 8-12 parts of hydrophobically modified nano-silica 3-5 parts of maleic anhydride-grafted polyolefin Polycaprolactone 4-6 parts.

5. The method for preparing waterproof fishing line according to claim 3, characterized in that, The low-melting-point nylon filament raw material also includes UV stabilizers and / or antioxidants.

6. The method for preparing waterproof fishing line according to claim 3, characterized in that, The components of the low-melting-point nylon chips include: PA6 100 copies PA12 35-45 servings Sebacic acid 8-12 parts 25-35 parts polycarbonate.

7. The method for preparing waterproof fishing line according to claim 3, characterized in that, The temperature in the drying mixer is 60-80°C.

8. The method for preparing waterproof fishing line according to claim 3, characterized in that, The spinning temperature is 220-240℃.

9. The method for preparing waterproof fishing line according to claim 1, characterized in that, Step (1) involves weaving an outer layer using ultra-high molecular weight polyethylene fibers, specifically as follows: The outer layer is woven using eight 110dtex ultra-high molecular weight polyethylene fibers, resulting in 10 weaving nodes per centimeter.

10. A waterproof fishing line, characterized in that, It is prepared by the method for preparing waterproof fishing line according to any one of claims 1 to 9.

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