A high-strength seawater-resistant PVC inflatable boat material and its preparation method

Abstract

The present invention relates to a high-strength seawater-resistant PVC inflatable boat material and a preparation method thereof, belonging to the technical field of inflatable boats; the present invention uses PVC resin, plasticizer, liquid barium-zinc stabilizer, fluorine-containing silica powder, silane coupling agent, perfluoropolyether, ultraviolet absorber, and antioxidant as raw materials to prepare a high-strength seawater-resistant PVC material, and uses this PVC material as the outer membrane to prepare a high-strength seawater-resistant PVC inflatable boat material. The present invention effectively improves the mechanical strength and aging resistance of the prepared PVC outer membrane by compounding three components of solid waste fluorine-containing silica powder, liquid barium-zinc stabilizer, and fluorine-containing polyether, and the finally obtained high-strength seawater-resistant PVC inflatable boat material has a hydrophobic and antifouling surface and excellent salt resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of inflatable boats. Specifically, it relates to a fabric for inflatable boat parts, and particularly to a high-strength seawater-resistant PVC inflatable boat material and a preparation method thereof. Background Art

[0002] Inflatable boats belong to inflatable vessels and are widely used in water leisure, entertainment, fishing, fishing and other water operations. They have the advantages of being lightweight and multifunctional. Compared with traditional boats, inflatable boats have higher safety and stronger adaptability and can be used in different waters. However, when encountering drifting or turbulent environments, if the inflatable boat itself lacks strength, it is easily scratched by sharp rocks. In addition, when the inflatable boat is used on the sea, due to the high salt content in seawater, the materials on the surface of the inflatable boat are easily eroded by seawater. This situation will become more and more serious as the use time extends. Therefore, it is necessary to provide a polyester fiber inflatable boat material resistant to seawater erosion to solve the above technical problems.

[0003] Silica powder is a commonly used filler for PVC modification, which can effectively improve the mechanical properties of PVC materials. However, silica itself is hydrophilic, prone to agglomeration, and has poor compatibility with PVC. Usually, additional modification is required. Fluorinated silica powder is a solid waste generated in the process of producing anhydrous hydrogen fluoride by the fluorosilicic acid method. Its main component is silica with part of the crystal lattice replaced by fluorine. Due to the action of fluorine atoms, the surface energy of fluorinated nano-silica is lower than that of silica. However, due to the presence of free fluorine on the surface of fluorinated nano-silica, it will affect active additives such as ultraviolet absorbers and antioxidants, and affect the weather resistance of PVC. Based on this, the present invention provides a high-strength seawater-resistant PVC inflatable boat material and a preparation method thereof. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-strength seawater-resistant PVC inflatable boat material and a preparation method thereof to solve the problems mentioned in the above background art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A high-strength seawater-resistant PVC inflatable boat material includes a high-strength seawater-resistant PVC outer membrane and a polyester fiber mesh inner membrane laminated with the high-strength seawater-resistant PVC outer membrane;

[0007] Among them, the high-strength seawater-resistant PVC outer membrane contains the following raw materials in parts by mass: 100 parts of PVC resin, 40 - 70 parts of plasticizer, 1.5 - 3.5 parts of liquid barium-zinc stabilizer, 12.5 - 17.5 parts of fluorinated silica powder, 0.6 - 1.4 parts of silane coupling agent, 8 - 12 parts of perfluoropolyether, 0.25 - 0.35 parts of ultraviolet absorber, and 0.15 - 0.25 parts of antioxidant;

[0008] A preparation method of a high-strength seawater-resistant PVC inflatable boat material, comprising the following steps:

[0009] First step, weigh each raw material by mass parts;

[0010] Second step, add fluorinated silica powder and deionized water into a reaction vessel. After raising the system temperature to 60-80 °C, add liquid barium zinc stabilizer into the vessel, continuously stir and react for 30 min. After the reaction ends, filter out the solid and dry it to obtain modified fluorinated silica powder;

[0011] Third step, put PVC resin, plasticizer, modified fluorinated silica powder, and silane coupling agent into a high-speed mixer, stir and mix at a low speed for a period of time, then switch to high-speed stirring to disperse evenly, and add ultraviolet absorber and antioxidant into the mixer before the end of high-speed stirring and mixing to obtain a mixed material;

[0012] Fourth step, add the mixed material into an internal mixer for mixing, set the rotors in the internal mixer to rotate in opposite directions, then add the gel after mixing into an open mill for plasticization. After the plasticization ends, filter and feed through an extruder to remove impurities. The rubber compound after impurity removal is added into a calender through a swing feeder for calendering and forming;

[0013] Fifth step, heat the calendered film through a leading-out device and then cool and shape it. After trimming and winding, a high-strength seawater-resistant PVC outer film is obtained;

[0014] Sixth step, pass the polyester fiber mesh cloth through a divergence platform, and successively perform ironing treatment through a preheating roller, dip and roll it in a paste trough with paste, and then pre-plasticize it by baking to obtain a polyester fiber mesh cloth inner film;

[0015] Seventh step, align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh cloth inner film respectively, then hot-press and bond them, and then cool them through leading-out and embossing processes to obtain the high-strength seawater-resistant PVC inflatable boat material.

[0016] Further, a special PVC paste is installed inside the paste trough.

[0017] Preferably, by mass parts, the formula of the PVC paste is 100 parts of PVC paste resin with a polymerization degree of 1500, 65-70 parts of plasticizer, and 2-3 parts of liquid barium zinc stabilizer.

[0018] Further, the plasticizer is one of diisononyl phthalate, dioctyl phthalate, and diisodecyl phthalate.

[0019] Preferably, the plasticizer is diisononyl phthalate.

[0020] Furthermore, the degree of polymerization of the PVC resin is 1000 - 1300.

[0021] Furthermore, the liquid barium-zinc stabilizer is one of LBZ-109 and LBZ-103.

[0022] Furthermore, the silane coupling agent is kh-570.

[0023] Furthermore, the relative molecular mass of the perfluoropolyether is 5000 - 6000.

[0024] Furthermore, the lattice fluorine content of the fluorinated silica powder is 6 - 10%.

[0025] Furthermore, the ultraviolet absorber is one of UV-531, UV-234, and UV-328.

[0026] Preferably, the ultraviolet absorber is UV-531.

[0027] Furthermore, the antioxidant is one of antioxidant 245, antioxidant 1076, and antioxidant 1010.

[0028] Preferably, the antioxidant is antioxidant 1010.

[0029] Furthermore, the rotational speed condition for low-speed stirring is 600 - 700 rpm, the time condition for low-speed stirring is 30 - 60 s, the rotational speed condition for high-speed stirring is 1100 - 1500 rpm, and the time condition for high-speed stirring is 350 - 450 s.

[0030] Furthermore, the time for adding perfluoropolyether, ultraviolet absorber, and antioxidant is 30 - 60 s before the end of high-speed stirring.

[0031] Preferably, the roll gap of the open mill is 4 - 5 mm, the temperature difference between the front and rear rolls is 10 °C, and the controlled temperature of the roll is 160 - 170 °C.

[0032] Furthermore, the temperature of the extruder is set at 130 - 160 °C, and the mesh size of the filter used in the extruder is 100 - 150 meshes.

[0033] Preferably, the temperature of the take-off roll in the take-off device is set at 140 - 160 °C, and the speed ratio is set at 1.1 - 2.5.

[0034] Furthermore, the temperature for pre-plasticizing the polyester fiber mesh is 140 - 150 °C.

[0035] Furthermore, the hot pressing and laminating temperature is 165 - 175 °C, and the laminating pressure is 25 - 45 kgf / cm 2 .

[0036] Advantages of the present invention:

[0037] In the present invention, a liquid barium-zinc stabilizer is used to modify fluorinated silica powder, and the free fluorine in the fluorinated silica is fixed by the liquid barium-zinc stabilizer, realizing the recycling of the fluorinated silica powder, which is beneficial to the treatment of fluorine pollution. After the modification, the free fluorine in the fluorinated silica powder is removed, and the lattice fluorine is retained. Due to the introduction of fluorine atoms, the modified fluorinated silica powder has better chemical inertness and lower surface energy compared with conventional silica fillers. It can not only improve the compatibility between the PVC material and the fluorinated silica powder, but also cooperate with barium fluoride and zinc fluoride precipitates obtained after the liquid barium-zinc stabilizer cures the free fluorine to improve the salt resistance of the PVC material, and effectively inhibit ultraviolet degradation and plasticizer migration, extending the service life of PVC products in outdoor or complex environments.

[0038] The present invention uses PVC resin, plasticizer, liquid barium-zinc stabilizer, fluorinated silica powder, silane coupling agent, perfluoropolyether, ultraviolet absorber, and antioxidant as raw materials to prepare a high-strength seawater-resistant PVC material, and uses this PVC material as the outer membrane to prepare a high-strength seawater-resistant PVC inflatable boat material. In the present invention, the fluorinated silica is first modified with a liquid barium-zinc stabilizer, and the modified fluorinated silica powder is mixed with PVC resin, plasticizer, and silane coupling agent, and then blended with perfluoropolyether, antioxidant, and ultraviolet absorber to obtain a mixture. Perfluoropolyether is highly fluorinated and has an extremely low surface energy, which can effectively improve the hydrophobic performance of the material. However, PVC has a low polarity and is difficult to form an effective reinforcing phase, and may also cause a decrease in the mechanical properties of the PVC material due to phase separation. The present invention combines perfluoropolyether and fluorinated silica powder, and uses the lower surface energy of the fluorinated silica powder to form a gradient match with the surface energy of perfluoropolyether, improving the interfacial wettability, enhancing the compatibility of the three-component system (polyvinyl chloride, perfluoropolyether, modified fluorinated silica powder), and reducing the phase separation phenomenon through fluorine-fluorine interaction, promoting the uniform dispersion of the fluorinated silica powder and perfluoropolyether in the PVC matrix. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Embodiment

[0040] A high-strength seawater-resistant PVC inflatable boat material, comprising a high-strength seawater-resistant PVC outer film and a polyester fiber mesh inner film laminated to the high-strength seawater-resistant PVC outer film;

[0041] Among them, the high-strength seawater-resistant PVC outer film contains the following raw materials in parts by mass: 100 parts of PVC resin, 70 parts of plasticizer, 3.5 parts of liquid barium-zinc stabilizer, 17.5 parts of fluorinated silica powder, 1.4 parts of silane coupling agent, 12 parts of perfluoropolyether, 0.25 parts of ultraviolet absorber, and 0.25 parts of antioxidant;

[0042] A preparation method of a high-strength seawater-resistant PVC inflatable boat material, comprising the following steps:

[0043] First step, weigh each raw material according to parts by mass;

[0044] Second step, add the fluorinated silica powder and deionized water into a reaction vessel. After raising the system temperature to 80 °C, add the liquid barium-zinc stabilizer to the vessel, continuously stir and react for 30 min. After the reaction ends, filter out the solid and dry to obtain the modified fluorinated silica powder;

[0045] Third step, put the PVC resin, plasticizer, modified fluorinated silica powder, and silane coupling agent into a high-speed mixer. Stir at a speed of 700 rpm for 30 s, then increase the speed to 1500 rpm, continue to stir for 350 s, and add the ultraviolet absorber, antioxidant, and perfluoropolyether to the mixer 60 s before the end of the stirring and mixing to obtain a mixture;

[0046] Fourth step, add the mixture into a mixer for mixing. Set the rotors in the mixing chamber to rotate in opposite directions. After that, add the gel after mixing to a calender for plasticization. Among them, the gap between the rollers of the calender is 5 mm, the temperature difference between the front and rear rollers is 10 °C, the temperature of the rollers is controlled at 170 °C. After plasticization, remove impurities through an extruder filter feeder. The rubber compound after removing impurities is added into a calender through a swing feeder for calendering and forming;

[0047] Fifth step, thermally draw out the film after calendering and forming through a take-off device. The temperature of the take-off roller in the take-off device is set at 160 °C, and the speed ratio is set at 2.5. Then cool and shape it, and after trimming and winding, obtain the high-strength seawater-resistant PVC outer film;

[0048] Sixth step, pass the polyester fiber mesh through a divergence platform, and successively perform ironing treatment through a preheating roller. After impregnating and sizing on a sizing tank filled with PVC paste, pre-plasticize it by drying at a temperature of 150 °C to obtain the polyester fiber mesh inner film;

[0049] Seventh step, align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh inner film respectively, and then at a temperature of 175 °C and a pressure of 25 kgf / cm2 Under hot pressing and laminating conditions, and then through processes of peeling off and embossing, followed by cooling, the high-strength seawater-resistant PVC inflatable boat material is obtained;

[0050] Among them, by mass parts, the formula of the PVC paste used in this embodiment is 100 parts of PVC paste resin with a polymerization degree of 1500, 70 parts of plasticizer, and 3 parts of liquid barium-zinc stabilizer;

[0051] Among them, the plasticizer used in this embodiment is diisodecyl phthalate, the polymerization degree of the PVC resin used is 1200 - 1300, the liquid barium-zinc stabilizer used is LBZ-109, the silane coupling agent used is kh-570, the lattice fluorine content of the fluorinated silica powder used is 10%, the ultraviolet absorber used is UV-328, the antioxidant used is antioxidant 245, and the relative molecular mass of the perfluoropolyether used is 5000 - 6000. Example

[0052] A high-strength seawater-resistant PVC inflatable boat material, comprising a high-strength seawater-resistant PVC outer film and a polyester fiber mesh inner film laminated with the high-strength seawater-resistant PVC outer film;

[0053] Among them, the high-strength seawater-resistant PVC outer film contains the following raw materials by mass parts: 100 parts of PVC resin, 40 parts of plasticizer, 1.5 parts of liquid barium-zinc stabilizer, 12.5 parts of fluorinated silica powder, 0.6 part of silane coupling agent, 8 parts of perfluoropolyether, 0.35 part of ultraviolet absorber, and 0.15 part of antioxidant;

[0054] A preparation method of a high-strength seawater-resistant PVC inflatable boat material, comprising the following steps:

[0055] The first step, weigh each raw material by mass parts;

[0056] The second step, add the fluorinated silica powder and deionized water into a reaction vessel. After raising the system temperature to 60 °C, add the liquid barium-zinc stabilizer into the vessel, continuously stir and react for 30 min. After the reaction ends, filter out the solid and dry to obtain the modified fluorinated silica powder;

[0057] The third step, put the PVC resin, plasticizer, modified fluorinated silica powder, and silane coupling agent into a high-speed mixer, stir at a speed of 600 rpm for 60 s, then increase the speed to 1100 rpm, continue to stir for 450 s, and add the ultraviolet absorber, antioxidant, and perfluoropolyether into the mixer 30 s before the end of stirring and mixing to obtain a mixture;

[0058] Step 4: Add the mixture into a mixer for mixing. Set the rotors in the mixing chamber to rotate in opposite directions. After mixing, add the resulting gel into an open mill for plasticization. The gap between the rollers of the open mill is 4 mm, the temperature difference between the front and rear rollers is 10 °C, and the temperature of the rollers is controlled at 160 °C. After plasticization, remove impurities by filtering and feeding through an extruder. The rubber compound after impurity removal is added into a calender through a swing feeder for calendering and forming.

[0059] Step 5: Thermally draw out the film after calendering and forming through a pulling-off device. The temperature of the pulling-off rollers in the pulling-off device is set at 140 °C, and the speed ratio is set at 1.1. Then, cool and shape it, and after trimming and winding, a high-strength seawater-resistant PVC outer film is obtained.

[0060] Step 6: Pass the polyester fiber mesh fabric through a diverging platform, and successively perform ironing treatment through a preheating roller. After dipping and coating with PVC paste in a paste tank containing PVC paste and pre-plasticizing by drying at 140 °C, a polyester fiber mesh fabric inner film is obtained.

[0061] Step 7: Align a high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh fabric inner film respectively, and then perform thermal pressing and laminating at a temperature of 165 °C and a pressure of 45 kgf / cm 2 condition. After that, through the processes of pulling-off and embossing, and then cooling, the high-strength seawater-resistant PVC inflatable boat material is obtained.

[0062] Among them, by mass, the formula of the PVC paste used in this embodiment is 100 parts of PVC paste resin with a polymerization degree of 1500, 65 parts of plasticizer, and 2 parts of liquid barium-zinc stabilizer.

[0063] Among them, the plasticizer used in this embodiment is diisooctyl phthalate, the polymerization degree of the PVC resin used is 1000 - 1100, the liquid barium-zinc stabilizer used is LBZ-109, the silane coupling agent used is kh-570, the lattice fluorine content of the fluorinated silica powder used is 6%, the ultraviolet absorber used is UV-234, the antioxidant used is antioxidant 1076, and the relative molecular mass of the perfluoropolyether used is 5000 - 6000. Example

[0064] A high-strength seawater-resistant PVC inflatable boat material, comprising a high-strength seawater-resistant PVC outer film and a polyester fiber mesh fabric inner film compounded with the high-strength seawater-resistant PVC outer film.

[0065] Among them, the high-strength seawater-resistant PVC outer film contains the following raw materials by mass: 100 parts of PVC resin, 55 parts of plasticizer, 2.5 parts of liquid barium-zinc stabilizer, 15 parts of fluorinated silica powder, 1 part of silane coupling agent, 10 parts of perfluoropolyether, 0.3 part of ultraviolet absorber, and 0.2 part of antioxidant.

[0066] A preparation method of a high-strength seawater-resistant PVC inflatable boat material, comprising the following steps:

[0067] First step, weigh each raw material by mass fraction;

[0068] Second step, add fluorinated silica powder and deionized water into a reaction vessel. After raising the system temperature to 60 - 80 °C, add liquid barium zinc stabilizer into the vessel, continuously stir and react for 30 min. After the reaction ends, filter out the solid and dry it to obtain modified fluorinated silica powder;

[0069] Third step, put PVC resin, plasticizer, modified fluorinated silica powder, and silane coupling agent into a high-speed mixer. Stir at a speed of 650 rpm for 45 s, then increase the speed to 1300 rpm and continue to stir for 400 s. Add ultraviolet absorber and antioxidant into the mixer 45 s before the end of stirring and mixing to obtain a mixed material;

[0070] Fourth step, add the mixed material into an internal mixer for mixing. Set the rotors in the internal mixer to rotate in opposite directions. After that, add the gel after mixing into an open mill for plasticization. Among them, the gap between the rolls of the open mill is 4.5 mm, the temperature difference between the front and rear rolls is 10 °C, and the temperature of the roll is controlled at 165 °C. After plasticization, remove impurities by filtering and feeding through an extruder. The rubber compound after removing impurities is added into a calender through a swing feeder for calendering and forming;

[0071] Fifth step, thermally extract the film after calendering and forming through a pulling device. The temperature of the pulling roller in the pulling device is set at 150 °C, and the speed ratio is set at 1.8. Then cool and shape it, and cut the edges and wind it up to obtain a high-strength seawater-resistant PVC outer film;

[0072] Sixth step, pass the polyester fiber mesh cloth through a divergence platform, and successively perform ironing treatment through a preheating roller. After impregnating and sizing it in a paste tank filled with PVC paste and pre-plasticizing it by drying at a temperature of 145 °C, obtain a polyester fiber mesh cloth inner film;

[0073] Seventh step, align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh cloth inner film respectively, and then perform thermal pressing and laminating at a temperature of 170 °C and a pressure of 35 kgf / cm 2 condition, and then cool it after passing through the processes of pulling and embossing to obtain the high-strength seawater-resistant PVC inflatable boat material;

[0074] Among them, by mass fraction, the formula of the PVC paste used in this embodiment is 100 parts of PVC paste resin with a polymerization degree of 1500, 67.5 parts of plasticizer, and 2.5 parts of liquid barium zinc stabilizer;

[0075] Among them, the plasticizer used in this embodiment is diisononyl phthalate, the polymerization degree of the PVC resin used is 1100 - 1200, the liquid barium-zinc stabilizer used is LBZ-103, the silane coupling agent used is kh-570, the lattice fluorine content of the fluorinated silica powder used is 8%, the ultraviolet absorber used is UV-531, the antioxidant used is antioxidant 1010, and the relative molecular mass of the perfluoropolyether used is 5000 - 6000.

[0076] Comparative Example 1

[0077] Remove the raw material "fluorinated silica powder" used in Example 3, and keep the other raw materials unchanged.

[0078] A high-strength seawater-resistant PVC inflatable boat material, including a high-strength seawater-resistant PVC outer film and a polyester fiber mesh inner film laminated with the high-strength seawater-resistant PVC outer film;

[0079] Among them, the high-strength seawater-resistant PVC outer film contains the following raw materials in parts by mass: 100 parts of PVC resin, 55 parts of plasticizer, 2.5 parts of liquid barium-zinc stabilizer, 1 part of silane coupling agent, 10 parts of perfluoropolyether, 0.3 part of ultraviolet absorber, and 0.2 part of antioxidant;

[0080] A preparation method of a high-strength seawater-resistant PVC inflatable boat material, including the following steps:

[0081] First step, weigh each raw material according to parts by mass;

[0082] Second step, put the PVC resin, plasticizer, liquid barium-zinc stabilizer, and silane coupling agent into a high-speed mixer, stir for 45 s at a rotation speed of 650 rpm, then increase the rotation speed to 1300 rpm, continue to stir for 400 s, and add the ultraviolet absorber, antioxidant, and perfluoropolyether to the mixer 45 s before the end of the stirring and mixing to obtain a mixed material;

[0083] Third step, add the mixed material into a kneader for kneading, set the rotors in the kneading chamber to rotate in opposite directions, and then add the gel after kneading to an open mill for plasticization. Among them, the roller gap of the open mill is 4.5 mm, the temperature difference between the front and rear rollers is 10 °C, the temperature of the roller is controlled at 165 °C. After the plasticization is completed, remove the impurities by filtering and feeding through an extruder, and add the rubber material after impurity removal into a calender through a swing feeder for calendering and forming;

[0084] Fourth step, thermally draw out the film after calendering and forming through a take-off device. The temperature of the take-off roller in the take-off device is set at 150 °C, the speed ratio is set at 1.8, and then it is cooled and shaped, trimmed and wound up to obtain a high-strength seawater-resistant PVC outer film;

[0085] Step 5: Pass the polyester fiber mesh fabric through a diverging platform, and successively iron it flat through a preheating roller. After impregnating and sizing it in a sizing tank filled with PVC paste, pre-plasticize it by drying at a temperature of 145 °C to obtain the inner membrane of the polyester fiber mesh fabric.

[0086] Step 6: Align a layer of high-strength seawater-resistant PVC outer membrane on the surface and bottom of the inner membrane of the polyester fiber mesh fabric respectively, and then thermally press and bond them at a temperature of 170 °C and a pressure of 35 kgf / cm2. After that, cool it through processes such as drawing and embossing to obtain the high-strength seawater-resistant PVC inflatable boat material.

[0087] Among them, by mass, the formula of the PVC paste used in this embodiment is 100 parts of PVC paste resin with a polymerization degree of 1500, 67.5 parts of plasticizer, and 2.5 parts of liquid barium-zinc stabilizer.

[0088] Among them, the plasticizer used in this embodiment is diisononyl phthalate, the polymerization degree of the PVC resin used is 1100 - 1200, the liquid barium-zinc stabilizer used is LBZ-103, the silane coupling agent used is kh-570, the lattice fluorine content of the fluorinated silica powder used is 8%, the ultraviolet absorber used is UV-531, the antioxidant used is antioxidant 1010, and the relative molecular mass of the perfluoropolyether used is 5000 - 6000.

[0089] Comparative Example 2

[0090] Remove the raw material "liquid barium-zinc stabilizer" used in Example 3, and keep the other raw materials unchanged.

[0091] A high-strength seawater-resistant PVC inflatable boat material, including a high-strength seawater-resistant PVC outer membrane and an inner membrane of polyester fiber mesh fabric compounded with the high-strength seawater-resistant PVC outer membrane.

[0092] Among them, the high-strength seawater-resistant PVC outer membrane contains the following raw materials by mass: 100 parts of PVC resin, 55 parts of plasticizer, 15 parts of fluorinated silica powder, 1 part of silane coupling agent, 10 parts of perfluoropolyether, 0.3 part of ultraviolet absorber, and 0.2 part of antioxidant.

[0093] A preparation method of a high-strength seawater-resistant PVC inflatable boat material, including the following steps:

[0094] Step 1: Weigh each raw material by mass.

[0095] Step 2: Put the PVC resin, plasticizer, fluorinated silica powder, and silane coupling agent into a high-speed mixer, stir at a speed of 650 rpm for 45 s, then increase the speed to 1300 rpm, continue to stir for 400 s, and add the ultraviolet absorber, antioxidant, and perfluoropolyether to the mixer 45 s before the end of the stirring and mixing to obtain a mixture.

[0096] Step 3: Add the mixture into the internal mixer for mixing. Set the rotors in the internal mixer to rotate in opposite directions. After mixing, add the gel obtained after mixing into the open mill for plasticization. Among them, the gap between the rolls of the open mill is 4.5 mm, the temperature difference between the front and rear rolls is 10°C, the temperature of the roll is controlled at 165°C. After plasticization, remove impurities through filtration feeding by an extruder. The rubber compound after impurity removal is added into a calender through a swing feeder for calendering and forming;

[0097] Step 4: Thermally extract the film after calendering and forming through a stripping device. The temperature of the stripping roller in the stripping device is set at 150°C, and the speed ratio is set at 1.8. Then, cool and shape it, and after trimming and winding, a high-strength seawater-resistant PVC outer film is obtained;

[0098] Step 5: Pass the polyester fiber mesh fabric through a diverging platform, and sequentially perform ironing treatment through a preheating roller. After impregnating and pasting in a paste tank filled with PVC paste, pre-plasticize it by drying at 145°C to obtain a polyester fiber mesh fabric inner film;

[0099] Step 6: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh fabric inner film respectively, and then perform hot pressing and laminating at a temperature of 170°C and a pressure of 35 kgf / cm2. After passing through the stripping and embossing processes, cool to obtain the high-strength seawater-resistant PVC inflatable boat material;

[0100] Among them, by mass, the formula of the PVC paste used in this example is 100 parts of PVC paste resin with a polymerization degree of 1500, 67.5 parts of plasticizer, and 2.5 parts of liquid barium-zinc stabilizer;

[0101] Among them, the plasticizer used in this example is diisononyl phthalate, the polymerization degree of the PVC resin used is 1100 - 1200, the silane coupling agent used is kh-570, the lattice fluorine content of the fluorinated silica powder used is 8%, the ultraviolet absorber used is UV-531, the antioxidant used is antioxidant 1010, and the relative molecular mass of the perfluoropolyether used is 5000 - 6000.

[0102] Comparative Example 3

[0103] Replace the "fluorinated silica powder" in the raw materials used in Example 3 with conventional silica powder.

[0104] A high-strength seawater-resistant PVC inflatable boat material, including a high-strength seawater-resistant PVC outer film and a polyester fiber mesh fabric inner film compounded with the high-strength seawater-resistant PVC outer film;

[0105] Among them, the high-strength seawater-resistant PVC outer film contains the following raw materials in parts by mass: 100 parts of PVC resin, 55 parts of plasticizer, 2.5 parts of liquid barium zinc stabilizer, 15 parts of silica powder, 1 part of silane coupling agent, 10 parts of perfluoropolyether, 0.3 part of ultraviolet absorber, and 0.2 part of antioxidant;

[0106] A preparation method of a high-strength seawater-resistant PVC inflatable boat material includes the following steps:

[0107] First step, weigh each raw material according to parts by mass;

[0108] Second step, put PVC resin, plasticizer, silica powder, liquid barium zinc stabilizer, and silane coupling agent into a high-speed mixer, stir at a speed of 650 rpm for 45 s, then increase the speed to 1300 rpm, continue to stir for 400 s, and add ultraviolet absorber, antioxidant, and perfluoropolyether to the mixer 45 s before the end of stirring and mixing to obtain a mixed material;

[0109] Third step, add the mixed material to an internal mixer for mixing, set the rotors in the internal mixer to rotate in opposite directions, and then add the gel after mixing to an open mill for plasticization. Among them, the roller gap of the open mill is 4.5 mm, the temperature difference between the front and rear rollers is 10 °C, the roller temperature is controlled at 165 °C. After plasticization, remove impurities through filtration feeding by an extruder, and add the rubber material after impurity removal to a calender through a swing feeder for calendering and forming;

[0110] Fourth step, thermally draw out the calendered film through a pulling device. The temperature of the pulling roller in the pulling device is set at 150 °C, and the speed ratio is set at 1.8. Then cool and shape it, and after trimming and winding, obtain the high-strength seawater-resistant PVC outer film;

[0111] Fifth step, pass the polyester fiber mesh cloth through a divergence platform, successively undergo ironing treatment by a preheating roller, dip and coat it with PVC paste in a paste tank containing PVC paste, and pre-plasticize it by drying at a temperature of 145 °C to obtain a polyester fiber mesh cloth inner film;

[0112] Sixth step, align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh cloth inner film respectively, and then thermally press and bond them at a temperature of 170 °C and a pressure of 35 kgf / cm 2 condition, and then obtain the high-strength seawater-resistant PVC inflatable boat material after cooling through the processes of pulling and embossing;

[0113] Among them, by mass, the formula of the PVC paste used in this embodiment is 100 parts of PVC paste resin with a polymerization degree of 1500, 67.5 parts of plasticizer, and 2.5 parts of liquid barium zinc stabilizer;

[0114] Among them, the plasticizer used in this embodiment is diisononyl phthalate, the polymerization degree of the PVC resin used is 1100 - 1200, the liquid barium-zinc stabilizer used is LBZ-103, the silane coupling agent used is kh-570, the ultraviolet absorber used is UV-531, the antioxidant used is antioxidant 1010, and the relative molecular mass of the perfluoropolyether used is 5000 - 6000.

[0115] Comparative Example 4

[0116] Remove the raw material "perfluoropolyether" used in Example 3, and keep the other raw materials unchanged.

[0117] A high-strength seawater-resistant PVC inflatable boat material, including a high-strength seawater-resistant PVC outer film, and a polyester fiber mesh inner film laminated with the high-strength seawater-resistant PVC outer film;

[0118] Among them, the high-strength seawater-resistant PVC outer film contains the following raw materials in parts by mass: 100 parts of PVC resin, 55 parts of plasticizer, 2.5 parts of liquid barium-zinc stabilizer, 15 parts of fluorinated silica powder, 1 part of silane coupling agent, 0.3 part of ultraviolet absorber, and 0.2 part of antioxidant;

[0119] A preparation method of a high-strength seawater-resistant PVC inflatable boat material, including the following steps:

[0120] First step, weigh each raw material according to the parts by mass;

[0121] Second step, add the fluorinated silica powder and deionized water into the reaction vessel. After raising the system temperature to 60 - 80 °C, add the liquid barium-zinc stabilizer into the vessel, continuously stir and react for 30 min. After the reaction is completed, filter out the solid and dry to obtain the modified fluorinated silica powder;

[0122] Third step, put the PVC resin, plasticizer, modified fluorinated silica powder, and silane coupling agent into a high-speed mixer. Stir at a speed of 650 rpm for 45 s, then increase the speed to 1300 rpm and continue to stir for 400 s. Add the ultraviolet absorber and antioxidant into the mixer 45 s before the end of the stirring and mixing to obtain a mixture;

[0123] Fourth step, add the mixture into a mixer for mixing. Set the rotors in the mixing chamber to rotate in opposite directions. After that, add the gel after mixing into an open mill for plasticization. Among them, the gap between the rollers of the open mill is 4.5 mm, the temperature difference between the front and rear rollers is 10 °C, the temperature of the roller is controlled at 165 °C. After the plasticization is completed, filter and feed through an extruder to remove impurities. The rubber compound after removing impurities is added into a calender through a swing feeder for calendering and forming;

[0124] Step 5: Thermally draw out the calendered film through a drawing device. The temperature of the drawing roller in the drawing device is set at 150 °C, and the speed ratio is set at 1.8. After that, it is cooled and shaped, and the edges are trimmed and wound up to obtain a high-strength seawater-resistant PVC outer film;

[0125] Step 6: Pass the polyester fiber mesh fabric through a diverging platform, and successively carry out ironing treatment through a preheating roller. After impregnating and pasting it in a paste tank filled with PVC paste, it is pre-plasticized by drying at a temperature of 145 °C to obtain a polyester fiber mesh fabric inner film;

[0126] Step 7: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh fabric inner film respectively, and then carry out thermal pressing and laminating at a temperature of 170 °C and a pressure of 35 kgf / cm 2 condition. After that, it is drawn away and embossed, and then cooled to obtain the high-strength seawater-resistant PVC inflatable boat material;

[0127] Among them, by mass, the formula of the PVC paste used in this example is 100 parts of PVC paste resin with a polymerization degree of 1500, 67.5 parts of plasticizer, and 2.5 parts of liquid barium-zinc stabilizer;

[0128] Among them, the plasticizer used in this example is diisononyl phthalate, the polymerization degree of the PVC resin used is 1100 - 1200, the liquid barium-zinc stabilizer used is LBZ-103, the silane coupling agent used is kh-570, the lattice fluorine content of the fluorinated silica powder used is 8%, the ultraviolet absorber used is UV-531, and the antioxidant used is antioxidant 1010.

[0129] Test Example 1

[0130] Perform performance tests on the high-strength seawater-resistant PVC inflatable boat materials obtained in Examples 1 - 3 and Comparative Examples 1 - 4 respectively. The test results are shown in Table 1:

[0131] Hydrophobic property test: Use a water contact angle tester produced by Dataphysics in Germany to test the water contact angle. If the water contact angle is greater than 90°, it shows hydrophobicity. On this basis, the larger the water contact angle, the better the hydrophobic property.

[0132] Tensile strength test: Refer to the national standard GB / T 1040 - 202X "Plastics - Determination of tensile properties" for testing.

[0133] Impact toughness test: Refer to the national standard GB / T 1843 - 2008 "Plastics - Determination of Izod impact strength" for testing.

[0134] Seawater resistance performance test: The test was carried out with reference to the standard ISO 4433-1:1997 "Thermoplastics pipes - Resistance to liquid chemicals - Classification - Part 1: Methods of immersion test". The test duration was 120 days. The seawater resistance performance was characterized by the percentage of mass loss after immersion. The smaller the percentage of mass loss, the better the seawater resistance performance.

[0135] Aging resistance performance test: The test was carried out with reference to the national standard GB / T 16422.2-2014 "Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps".

[0136] Table 1

[0137] Project Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Water contact angle (°) 146 141 144 126 143 124 118 Tensile strength (MPa) 88.32 86.94 89.17 70.43 83.37 77.92 87.65 Tensile strength after aging (MPa) 86.45 85.24 87.28 66.94 72.13 74.08 84.89 Impact strength (MPa) 12.47 11.86 12.65 8.34 10.98 9.14 11.24 Impact strength after aging (MPa) 11.17 10.43 11.63 7.14 8.76 7.93 10.22 Mass loss percentage after seawater immersion (%) 0.14 0.22 0.13 1.36 0.24 1.24 1.22

[0138] As can be seen from Table 1, a high-strength seawater-resistant PVC inflatable boat material of the present invention in Examples 1-3 has excellent mechanical strength and aging resistance performance, good hydrophobic performance, and excellent salt resistance.

[0139] The above has introduced in detail a high-strength seawater-resistant PVC inflatable boat material and its preparation method provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention, including the best mode, and also enables any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combination method. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and modifications can be made to the present invention without departing from the principle of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-strength seawater-resistant PVC inflatable boat material, characterized in that, It includes a high-strength seawater-resistant PVC outer film and a polyester fiber mesh inner film compounded with the high-strength seawater-resistant PVC outer film; Among them, by mass fraction, the high-strength seawater-resistant PVC outer film contains the following raw materials: 100 parts of PVC resin, 40 - 70 parts of plasticizer, 1.5 - 3.5 parts of liquid barium zinc stabilizer, 12.5 - 17.5 parts of fluorinated silica powder, 0.6 - 1.4 parts of silane coupling agent, 8 - 12 parts of perfluoropolyether, 0.25 - 0.35 parts of ultraviolet absorber, 0.15 - 0.25 parts of antioxidant; The plasticizer is one of diisononyl phthalate, dioctyl phthalate, diisodecyl phthalate. The liquid barium zinc stabilizer is LBZ - 109, LBZ - 103. The silane coupling agent is kh - 570. The relative molecular mass of the perfluoropolyether is 5000 - 6000. The lattice fluorine content of the fluorinated silica powder is 6 - 10%. The ultraviolet absorber is one of UV - 531, UV - 234, UV - 328. The antioxidant is one of antioxidant 245, antioxidant 1076, antioxidant 1010. The degree of polymerization of the PVC resin is 1000 - 1300; The modified fluorinated silica powder uses the liquid barium zinc stabilizer to fix the free fluorine in the fluorinated silica, realizing the recycling of the fluorinated silica powder, which is beneficial to the treatment of fluorine pollution. After modification, the fluorinated silica powder removes the free fluorine and retains the lattice fluorine, which can synergistically improve the salt resistance of the PVC material with the barium fluoride and zinc fluoride precipitates obtained by curing the free fluorine with the liquid barium zinc stabilizer.

2. A preparation method of a high-strength seawater-resistant PVC inflatable boat material as described in claim 1, characterized in that, It includes the following steps: Preparation of the high-strength seawater-resistant PVC outer film: Weigh each raw material by mass fraction, add the fluorinated silica powder and deionized water into the reaction vessel, raise the system temperature to 60 - 80 °C, then add the liquid barium zinc stabilizer into the reaction vessel and keep it warm for reaction. After that, filter out the solid and dry it to obtain the modified fluorinated silica powder. The obtained modified fluorinated silica powder and the remaining raw materials are mixed evenly and then added to obtain the high-strength seawater-resistant PVC outer film through mixing, plasticizing, extrusion for impurity removal, calendering, hot drawing, cooling, and edge trimming and winding; Preparation of the polyester fiber mesh inner film: The polyester fiber mesh is ironed and then impregnated with paste in a paste trough, and then pre-plasticized by drying to obtain the polyester fiber mesh inner film; Preparation of the high-strength seawater-resistant PVC inflatable boat material: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh inner film respectively, then thermally press and bond them, and then cool them after the processes of drawing away and embossing to obtain the high-strength seawater-resistant PVC inflatable boat material.

3. The preparation method of a high-strength seawater-resistant PVC inflatable boat material according to claim 2, characterized in that, The inside of the paste trough is filled with PVC paste. By mass fraction, the formula of the PVC paste is 100 parts of PVC paste resin with a degree of polymerization of 1500, 65 - 70 parts of plasticizer, and 2 - 3 parts of liquid barium zinc stabilizer.

4. The preparation method of a high-strength seawater-resistant PVC inflatable boat material according to claim 2, characterized in that, In the preparation of the high-strength seawater-resistant PVC outer film, the stirring conditions are as follows: stir at a rotational speed of 600 - 700 rpm for 30 - 60 s, then increase the rotational speed to 1100 - 1500 rpm and continue stirring for 350 - 450 s.

5. The preparation method of a high-strength seawater-resistant PVC inflatable boat material according to claim 2, characterized in that, In the preparation of the high-strength seawater-resistant PVC outer film, the temperature for extrusion filtration and impurity removal is set at 130 - 160 °C, and the mesh size of the filter screen for impurity removal is 100 - 150 meshes.

6. The preparation method of a high-strength seawater-resistant PVC inflatable boat material according to claim 2, characterized in that, In the preparation of the polyester fiber mesh inner film, the pre-plasticization temperature is 140 - 150 °C.

7. The preparation method of a high-strength seawater-resistant PVC inflatable boat material according to claim 2, characterized in that, In the high-strength seawater-resistant PVC inflatable boat material, the hot pressing and laminating temperature is 165 - 175 °C, and the laminating pressure is 25 - 45 kgf / cm2.