High-strength seawater-resistant PVC inflatable boat material and preparation method thereof

Abstract

The invention relates to a high-strength seawater-resistant PVC inflatable boat material and a preparation method thereof, and belongs to the technical field of inflatable boats. The high-strength seawater-resistant PVC material is prepared by taking PVC resin, a plasticizer, a liquid barium-zinc stabilizer, fluorine-containing silicon dioxide powder, a silane coupling agent, perfluoropolyether, an ultraviolet light absorber and an antioxidant as raw materials, and the high-strength seawater-resistant PVC inflatable boat material is prepared by taking the PVC material as an outer film. The solid waste fluorine-containing silicon dioxide powder, the liquid barium-zinc stabilizer and the fluorine-containing polyether are compounded, so that the mechanical strength and aging resistance of the prepared PVC outer film are effectively improved, and the finally obtained high-strength seawater-resistant PVC inflatable boat material is hydrophobic and antifouling in surface and has excellent salt resistance.

Description

Technical Field

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

[0002] Inflatable boats are inflatable vessels and are widely used in water operations such as water leisure, entertainment, fishing, and fishing. They have the advantages of being light and multifunctional. Compared with traditional boats, inflatable boats are safer and more adaptable and can be used in different waters. However, when encountering drifting or rapids, if the inflatable boat itself is not strong enough, it is easy to be scratched by sharp rocks. In addition, when the inflatable boat is used on the sea, due to the high salt content in seawater, the material on the surface of the inflatable boat is easily eroded by seawater. This situation will become more and more serious as the use time increases. 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 and can effectively improve the mechanical properties of PVC materials. However, silica itself is hydrophilic, easy to agglomerate, and has poor compatibility with PVC, and usually requires additional modification. Fluorine-containing silica powder is a solid waste produced in the process of producing anhydrous hydrogen fluoride by the fluosilicic acid method. Its main component is silica with part of the lattice substituted by fluorine. Due to the effect of fluorine atoms, the surface energy of fluorine-containing nano-silica is lower than that of silica. However, the free fluorine present on the surface of fluorine-containing nano-silica will affect active additives such as ultraviolet absorbers and antioxidants, thereby affecting 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 object of the present invention is to provide a high-strength seawater-resistant PVC inflatable boat material and a preparation method thereof, so as to solve the problems mentioned in the above background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions: 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises the following raw materials in parts by weight: 100 parts of PVC resin, 40 to 70 parts of plasticizer, 1.5 to 3.5 parts of liquid barium zinc stabilizer, 12.5 to 17.5 parts of fluorinated silicon dioxide powder, 0.6 to 1.4 parts of silane coupling agent, 8 to 12 parts of perfluoropolyether, 0.25 to 0.35 parts of ultraviolet absorber, and 0.15 to 0.25 parts of antioxidant; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Add fluorinated silica powder and deionized water into a reaction vessel, raise the system temperature to 60-80°C, add liquid barium zinc stabilizer into the vessel, continue stirring and reacting for 30 minutes, filter out the solid after the reaction is completed, and dry to obtain modified fluorinated silica powder; The third step is to put the 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, antioxidant and perfluoropolyether into the mixer before the high-speed stirring and mixing is completed to obtain a mixture; Step 4: Add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, then add the gel after mixing into the open mixer for plasticization, filter and feed the material through the extruder to remove impurities after plasticization, and add the rubber material after impurities removal into the calender through the swing feeder for calendering and molding; Step 5: The calendered film is taken out through a take-off device for hot drawing, cooled and shaped, and then trimmed and rolled to obtain a high-strength seawater-resistant PVC outer film; Step 6: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating roller, dipped in the paste tank, and then dried and pre-plasticized to obtain the inner film of the polyester fiber mesh; Step 7: 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 hot-press and bond them together, and then cool them after decoupling and embossing processes to obtain the high-strength seawater-resistant PVC inflatable boat material.

[0006] Furthermore, the paste tank is filled with special PVC paste.

[0007] Preferably, 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, calculated by weight.

[0008] Furthermore, the plasticizer is one of diisononyl phthalate, dioctyl phthalate and diisodecyl phthalate.

[0009] Preferably, the plasticizer is diisononyl phthalate.

[0010] Furthermore, the polymerization degree of the PVC resin is 1000-1300.

[0011] Furthermore, the liquid barium zinc stabilizer is one of LBZ-109 and LBZ-103.

[0012] Furthermore, the silane coupling agent is kh-570.

[0013] Furthermore, the relative molecular mass of the perfluoropolyether is 5000-6000.

[0014] Furthermore, the lattice fluorine content of the fluorine-containing silica powder is 6 to 10%.

[0015] Furthermore, the ultraviolet absorber is one of UV-531, UV-234 and UV-328.

[0016] Preferably, the ultraviolet absorber is UV-531.

[0017] Furthermore, the antioxidant is one of antioxidant 245, antioxidant 1076, and antioxidant 1010.

[0018] Preferably, the antioxidant is antioxidant 1010.

[0019] Furthermore, the rotation speed condition of low-speed stirring is 600-700 rpm, the time condition of low-speed stirring is 30-60 s, and the rotation speed condition of high-speed stirring is 1100-1500 rpm, and the time condition of high-speed stirring is 350-450 s.

[0020] Furthermore, the time for adding the perfluoropolyether, the ultraviolet absorber and the antioxidant is 30 to 60 seconds before the end of the high-speed stirring.

[0021] Preferably, the roller gap of the mixing mill is 4-5 mm, the temperature difference between the front and rear rollers is 10° C., and the roller temperature is controlled at 160-170° C.

[0022] Furthermore, the temperature of the extruder is set to 130-160° C., and the filter screen used in the extruder has a specification of 100-150 meshes.

[0023] Preferably, the temperature of the decoupling roller in the decoupling device is set to 140-160° C., and the speed ratio is set to 1.1-2.5.

[0024] Furthermore, the pre-plasticization temperature of the polyester fiber web is 140-150°C.

[0025] Furthermore, the hot pressing bonding temperature is 165-175°C, and the bonding pressure is 25-45 kgf / cm 2 .

[0026] Beneficial effects of the present invention: The present invention uses a liquid barium zinc stabilizer to modify fluorine-containing silica powder, and uses the liquid barium zinc stabilizer to fix free fluorine in the fluorine-containing silica, thereby realizing the recycling of the fluorine-containing silica powder, which is beneficial to the treatment of fluorine pollution. The modified fluorine-containing silica powder removes free fluorine and retains lattice fluorine. Due to the introduction of fluorine atoms, the modified fluorine-containing silica powder has better chemical inertness and lower surface energy than conventional silica fillers, and can not only improve the compatibility of PVC materials with fluorine-containing silica powder, but also can synergistically improve the salt resistance of PVC materials together with barium fluoride and zinc fluoride precipitates obtained after the liquid barium zinc stabilizer solidifies the free fluorine, and effectively inhibits ultraviolet degradation and plasticizer migration, thereby extending the service life of PVC products in outdoor or complex environments.

[0027] The invention uses PVC resin, plasticizer, liquid barium zinc stabilizer, fluorinated silicon dioxide powder, silane coupling agent, perfluoropolyether, ultraviolet absorber and antioxidant as raw materials to prepare a high-strength seawater-resistant PVC material, and uses the PVC material as an outer film to prepare a high-strength seawater-resistant PVC inflatable boat material. The invention first modifies the fluorinated silicon dioxide with liquid barium zinc stabilizer, and mixes the modified fluorinated silicon dioxide powder with PVC resin, plasticizer and silane coupling agent, and then blends with perfluoropolyether, antioxidant and ultraviolet absorber to obtain a mixture. The perfluoropolyether itself is highly fluorinated, and the surface energy It is extremely low and can effectively improve the hydrophobicity of the material. However, PVC has a low polarity and is difficult to form an effective reinforcing phase. Phase separation may also lead to a decrease in the mechanical properties of the PVC material. The present invention compounds perfluoropolyether and fluorinated silica powder and utilizes the lower surface energy of fluorinated silica powder to form a gradient match with the surface energy of perfluoropolyether, thereby improving interface wettability, enhancing the compatibility of the three-component system (polyvinyl chloride, perfluoropolyether, and modified fluorinated silica powder), reducing phase separation through fluorine-fluorine interaction, and promoting the uniform dispersion of fluorinated silica powder and perfluoropolyether in the PVC matrix. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0029] 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises the following raw materials in parts by weight: 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; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Add fluorinated silica powder and deionized water into a reaction vessel, raise the system temperature to 80°C, add liquid barium zinc stabilizer into the vessel, continue stirring and reacting for 30 minutes, filter out the solid after the reaction is completed, and dry to obtain modified fluorinated silica powder; Step 3: Put the PVC resin, plasticizer, modified fluorinated silica powder and silane coupling agent into a high-speed mixer, stir at 700 rpm for 30 seconds, then increase the speed to 1500 rpm, continue stirring for 350 seconds, and add ultraviolet absorber, antioxidant and perfluoropolyether into the mixer 60 seconds before the end of stirring and mixing to obtain a mixture; Step 4: Add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, then add the mixed gel into the open mixer for plasticization, wherein the roller gap of the open mixer is 5mm, the temperature difference between the front and rear rollers is 10°C, and the roller temperature is controlled at 170°C. After plasticization, filter the material through the extruder to remove impurities, and add the removed rubber material into the calender through the swing feeder for calendering; Step 5: The calendered film is hot-drawn out through a drawing device, the drawing roller temperature in the drawing device is set to 160°C, and the speed ratio is set to 2.5, and then cooled and shaped, and the high-strength seawater-resistant PVC outer film is obtained after trimming and rolling; Step 6: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating rollers in turn, and then be dipped and pasted in the paste tank filled with PVC paste, and then be dried and pre-plasticized at a temperature of 150°C to obtain the inner film of the polyester fiber mesh; Step 7: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh inner film at a temperature of 175°C and a pressure of 25kgf / cm 2 The high-strength seawater-resistant PVC inflatable boat material is obtained by hot pressing and laminating under the following conditions, and then cooling after decoupling and embossing processes; Among them, the formula of the PVC paste used in this embodiment is 100 parts of PVC paste resin with a degree of polymerization of 1500, 70 parts of plasticizer, and 3 parts of liquid barium zinc stabilizer, calculated by mass parts; 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 fluorine-containing 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

[0030] 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises the following raw materials in parts by mass: 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 parts of silane coupling agent, 8 parts of perfluoropolyether, 0.35 parts of ultraviolet absorber, and 0.15 parts of antioxidant; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Add fluorinated silica powder and deionized water into a reaction vessel, raise the system temperature to 60°C, add liquid barium zinc stabilizer into the vessel, continue stirring and reacting for 30 minutes, filter out the solid after the reaction is completed, and dry to obtain modified fluorinated silica powder; Step 3: Put the PVC resin, plasticizer, modified fluorinated silica powder and silane coupling agent into a high-speed mixer, stir at 600 rpm for 60 seconds, then increase the speed to 1100 rpm, continue stirring for 450 seconds, and add ultraviolet absorber, antioxidant and perfluoropolyether into the mixer 30 seconds before the end of stirring and mixing to obtain a mixture; Step 4: Add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, then add the mixed gel into the open mixer for plasticization, wherein the roller gap of the open mixer is 4mm, the temperature difference between the front and rear rollers is 10°C, and the roller temperature is controlled at 160°C. After plasticization, filter the material through the extruder to remove impurities, and add the removed rubber material into the calender through the swing feeder for calendering and molding; Step 5: The calendered film is hot-drawn out through a drawing device, the drawing roller temperature in the drawing device is set to 140°C, and the speed ratio is set to 1.1. After that, it is cooled and shaped, and the edges are trimmed and rolled to obtain a high-strength seawater-resistant PVC outer film; Step 6: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating rollers in turn, and then be dipped and pasted in the paste tank filled with PVC paste, and then be dried and pre-plasticized at a temperature of 140°C to obtain the inner film of the polyester fiber mesh; Step 7: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh inner film at a temperature of 165°C and a pressure of 45kgf / cm 2 The high-strength seawater-resistant PVC inflatable boat material is obtained by hot pressing and laminating under the following conditions, and then cooling after decoupling and embossing processes; Among them, the formula of the PVC paste used in this embodiment is 100 parts of PVC paste resin with a degree of polymerization of 1500, 65 parts of plasticizer, and 2 parts of liquid barium zinc stabilizer, calculated by mass parts; Among them, the plasticizer used in this embodiment is diethyl 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 fluorine-containing 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

[0031] 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises 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, 10 parts of perfluoropolyether, 0.3 parts of ultraviolet absorber, and 0.2 parts of antioxidant; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Add fluorinated silica powder and deionized water into a reaction vessel, raise the system temperature to 60-80°C, add liquid barium zinc stabilizer into the vessel, continue stirring and reacting for 30 minutes, filter out the solid after the reaction is completed, and dry to obtain modified fluorinated silica powder; Step 3: Put the PVC resin, plasticizer, modified fluorinated silica powder and silane coupling agent into a high-speed mixer, stir at 650 rpm for 45 seconds, then increase the speed to 1300 rpm, continue stirring for 400 seconds, and add ultraviolet absorber, antioxidant and perfluoropolyether into the mixer 45 seconds before the end of stirring and mixing to obtain a mixture; Step 4: Add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, then add the mixed gel into the open mixer for plasticization, wherein the roller gap of the open mixer is 4.5mm, the temperature difference between the front and rear rollers is 10°C, and the roller temperature is controlled at 165°C. After plasticization, filter the material through the extruder to remove impurities, and add the removed rubber material into the calender through the swing feeder for calendering; Step 5: The calendered film is hot-drawn out through a drawing device, the drawing roller temperature in the drawing device is set to 150°C, and the speed ratio is set to 1.8, and then cooled and shaped, and the high-strength seawater-resistant PVC outer film is obtained after trimming and rolling; Step 6: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating rollers in turn, and then be dipped and pasted in the paste tank filled with PVC paste, and then be dried and pre-plasticized at a temperature of 145°C to obtain the inner film of the polyester fiber mesh; Step 7: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh inner film at a temperature of 170°C and a pressure of 35kgf / cm 2 The high-strength seawater-resistant PVC inflatable boat material is obtained by hot pressing and laminating under the following conditions, and then cooling after decoupling and embossing processes; Among them, 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, calculated by mass parts; 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 fluorine-containing 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.

[0032] Comparative Example 1 The raw material "fluorine-containing silicon dioxide powder" used in Example 3 was removed, and the other raw materials remained unchanged.

[0033] 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises 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 parts of ultraviolet absorber, and 0.2 parts of antioxidant; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Put PVC resin, plasticizer, liquid barium zinc stabilizer and silane coupling agent into a high-speed mixer, stir at 650 rpm for 45 seconds, then increase the speed to 1300 rpm, continue stirring for 400 seconds, and add ultraviolet absorber, antioxidant and perfluoropolyether into the mixer 45 seconds before the end of stirring and mixing to obtain a mixture; The third step is to add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, and then add the gel after mixing into the open mixer for plasticization, wherein the roller gap of the open mixer is 4.5mm, the temperature difference between the front and rear rollers is 10°C, and the roller temperature is controlled at 165°C. After plasticization, the material is filtered and fed through an extruder to remove impurities, and the rubber material after impurities removal is added to the calender through a swing feeder for calendering and molding; Step 4: The calendered film is hot-drawn out through a drawing device, the drawing roller temperature in the drawing device is set to 150°C, and the speed ratio is set to 1.8, and then cooled and shaped, and the high-strength seawater-resistant PVC outer film is obtained after trimming and rolling; Step 5: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating roller in turn. Then, the polyester fiber mesh is dipped and pasted in the paste tank filled with PVC paste, and then dried and pre-plasticized at a temperature of 145°C to obtain the inner film of the polyester fiber mesh. Step 6: 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 hot-press and laminate them at a temperature of 170°C and a pressure of 35kgf / cm2, and then cool them after desorption and embossing processes to obtain the high-strength seawater-resistant PVC inflatable boat material; Among them, 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, calculated by mass parts; 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 fluorine-containing 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.

[0034] Comparative Example 2 The raw material "liquid barium zinc stabilizer" used in Example 3 was removed, and the other raw materials remained unchanged.

[0035] 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises the following raw materials in parts 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 parts of ultraviolet absorber, and 0.2 parts of antioxidant; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Put the PVC resin, plasticizer, fluorinated silica powder and silane coupling agent into a high-speed mixer, stir at 650 rpm for 45 seconds, then increase the speed to 1300 rpm, continue stirring for 400 seconds, and add ultraviolet absorber, antioxidant and perfluoropolyether into the mixer 45 seconds before the end of stirring and mixing to obtain a mixture; The third step is to add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, and then add the gel after mixing into the open mixer for plasticization, wherein the roller gap of the open mixer is 4.5mm, the temperature difference between the front and rear rollers is 10°C, and the roller temperature is controlled at 165°C. After plasticization, the material is filtered and fed through an extruder to remove impurities, and the rubber material after impurities removal is added to the calender through a swing feeder for calendering and molding; Step 4: The calendered film is hot-drawn out through a drawing device, the drawing roller temperature in the drawing device is set to 150°C, and the speed ratio is set to 1.8, and then cooled and shaped, and the high-strength seawater-resistant PVC outer film is obtained after trimming and rolling; Step 5: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating roller in turn. Then, the polyester fiber mesh is dipped and pasted in the paste tank filled with PVC paste, and then dried and pre-plasticized at a temperature of 145°C to obtain the inner film of the polyester fiber mesh. Step 6: 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 hot-press and laminate them at a temperature of 170°C and a pressure of 35kgf / cm2, and then cool them after desorption and embossing processes to obtain the high-strength seawater-resistant PVC inflatable boat material; Among them, 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, calculated by mass parts; Among them, the plasticizer used in this embodiment is diisononyl phthalate, the degree of polymerization 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.

[0036] Comparative Example 3 The "fluorine-containing silica powder" of the raw material used in Example 3 was replaced with conventional silica powder.

[0037] 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises 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 silicon dioxide powder, 1 part of silane coupling agent, 10 parts of perfluoropolyether, 0.3 parts of ultraviolet absorber, and 0.2 parts of antioxidant; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Put PVC resin, plasticizer, silica powder, liquid barium zinc stabilizer and silane coupling agent into a high-speed mixer, stir at 650 rpm for 45 seconds, then increase the speed to 1300 rpm, continue stirring for 400 seconds, and add ultraviolet absorber, antioxidant and perfluoropolyether into the mixer 45 seconds before the end of stirring and mixing to obtain a mixture; The third step is to add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, and then add the gel after mixing into the open mixer for plasticization, wherein the roller gap of the open mixer is 4.5mm, the temperature difference between the front and rear rollers is 10°C, and the roller temperature is controlled at 165°C. After plasticization, the material is filtered and fed through an extruder to remove impurities, and the rubber material after impurities removal is added to the calender through a swing feeder for calendering and molding; Step 4: The calendered film is hot-drawn out through a drawing device, the drawing roller temperature in the drawing device is set to 150°C, and the speed ratio is set to 1.8, and then cooled and shaped, and the high-strength seawater-resistant PVC outer film is obtained after trimming and rolling; Step 5: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating roller in turn. Then, the polyester fiber mesh is dipped and pasted in the paste tank filled with PVC paste, and then dried and pre-plasticized at a temperature of 145°C to obtain the inner film of the polyester fiber mesh. Step 6: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh inner film at a temperature of 170°C and a pressure of 35kgf / cm 2 The high-strength seawater-resistant PVC inflatable boat material is obtained by hot pressing and laminating under the following conditions, and then cooling after decoupling and embossing processes; Among them, 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, calculated by mass parts; 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.

[0038] Comparative Example 4 The raw material "perfluoropolyether" used in Example 3 was removed, and the other raw materials remained unchanged.

[0039] 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 composited with the high-strength seawater-resistant PVC outer film; The high-strength seawater-resistant PVC outer film comprises 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 fluorine-containing silica powder, 1 part of silane coupling agent, 0.3 parts of ultraviolet absorber, and 0.2 parts of antioxidant; A method for preparing a high-strength seawater-resistant PVC inflatable boat material comprises the following steps: The first step is to weigh each raw material according to the mass fraction; Step 2: Add fluorinated silica powder and deionized water into a reaction vessel, raise the system temperature to 60-80°C, add liquid barium zinc stabilizer into the vessel, continue stirring and reacting for 30 minutes, filter out the solid after the reaction is completed, and dry to obtain modified fluorinated silica powder; Step 3: Put the PVC resin, plasticizer, modified fluorinated silica powder and silane coupling agent into a high-speed mixer, stir at 650 rpm for 45 seconds, then increase the speed to 1300 rpm, continue stirring for 400 seconds, and add ultraviolet absorber and antioxidant to the mixer 45 seconds before the end of stirring and mixing to obtain a mixture; Step 4: Add the mixed material into the internal mixer for mixing, set the rotor inside the internal mixer to rotate in opposite directions, then add the mixed gel into the open mixer for plasticization, wherein the roller gap of the open mixer is 4.5mm, the temperature difference between the front and rear rollers is 10°C, and the roller temperature is controlled at 165°C. After plasticization, filter the material through the extruder to remove impurities, and add the removed rubber material into the calender through the swing feeder for calendering; Step 5: The calendered film is hot-drawn out through a drawing device, the drawing roller temperature in the drawing device is set to 150°C, and the speed ratio is set to 1.8, and then cooled and shaped, and the high-strength seawater-resistant PVC outer film is obtained after trimming and rolling; Step 6: Pass the polyester fiber mesh through the diverging platform, and then be ironed by the preheating rollers in turn, and then be dipped and pasted in the paste tank filled with PVC paste, and then be dried and pre-plasticized at a temperature of 145°C to obtain the inner film of the polyester fiber mesh; Step 7: Align a layer of high-strength seawater-resistant PVC outer film on the surface and bottom of the polyester fiber mesh inner film at a temperature of 170°C and a pressure of 35kgf / cm 2 The high-strength seawater-resistant PVC inflatable boat material is obtained by hot pressing and laminating under the following conditions, and then cooling after decoupling and embossing processes; Among them, 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, calculated by mass parts; Among them, the plasticizer used in this embodiment is diisononyl phthalate, the degree of polymerization 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 fluorine-containing silica powder used is 8%, the ultraviolet absorber used is UV-531, and the antioxidant used is antioxidant 1010.

[0040] Test Example 1 The high-strength seawater-resistant PVC inflatable boat materials obtained in Examples 1-3 and Comparative Examples 1-4 were subjected to performance tests respectively, and the test results are shown in Table 1: Hydrophobic performance test: Use the water contact angle tester produced by German Dataphysics to test the water contact angle. If the water contact angle is greater than 90°, it is hydrophobic. On this basis, the larger the water contact angle, the better the hydrophobic performance.

[0041] Tensile strength test: Tested in accordance with the national standard GB / T 1040-202X "Determination of tensile properties of plastics".

[0042] Impact toughness test: Tested in accordance with the national standard GB / T 1843-2008 "Determination of cantilever beam impact strength of plastics".

[0043] Seawater resistance test: The test is carried out in accordance with the standard ISO 4433-1:1997 "Classification of thermoplastic pipes for resistance to liquid chemicals - Part 1: Immersion test method". The test period is 120 days. The seawater resistance is characterized by the percentage of mass loss after immersion. The smaller the percentage of mass loss, the better the seawater resistance.

[0044] Aging resistance test: Tested in accordance with the national standard GB / T 16422.2-2014 "Plastics laboratory light source exposure test method Part 2: Xenon arc lamp".

[0045] Table 1 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 It can be seen from Table 1 that the high-strength seawater-resistant PVC inflatable boat material of the present invention in Examples 1-3 has excellent mechanical strength and aging resistance, good hydrophobicity and excellent salt resistance.

[0046] The above is a detailed introduction to a high-strength seawater-resistant PVC inflatable boat material and a preparation method thereof provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enables any technician in the field to practice the present invention, including the manufacture and use of any device or system, and the implementation of any combination method. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way. The reason why these combinations are not exhaustively described in this specification is only for the consideration of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall 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, the high-strength seawater-resistant PVC outer film contains the following raw materials, measured by mass: 100 parts of PVC resin, 40 to 70 parts of plasticizer, 1.5 to 3.5 parts of liquid barium zinc stabilizer, 12.5 to 17.5 parts of fluorine-containing silica powder, 0.6 to 1.4 parts of silane coupling agent, 8 to 12 parts of perfluoropolyether, 0.25 to 0.35 parts of ultraviolet absorber, and 0.15 to 0.25 parts of antioxidant.

2. The high-strength seawater-resistant PVC inflatable boat material according to claim 1, characterized in that: The plasticizer is one of diisononyl phthalate, dioctyl phthalate and diisodecyl phthalate, the liquid barium zinc stabilizer is LBZ-109 or 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 fluorine-containing silicon dioxide powder is 6-10%, the ultraviolet absorber is one of UV-531, UV-234 and UV-328, the antioxidant is one of antioxidant 245, antioxidant 1076 and antioxidant 1010, and the polymerization degree of the PVC resin is 1000-1300.

3. A method for preparing a high-strength seawater-resistant PVC inflatable boat material as claimed in claim 1, characterized in that: The following steps are involved: Preparation of high-strength seawater-resistant PVC outer film: After weighing each raw material by mass, add fluorine-containing silicon dioxide powder and deionized water into a reaction container and raise the system temperature to 60-80°C, then add liquid barium zinc stabilizer into the reaction container and keep warm for reaction, then filter out the solid and dry to obtain modified fluorine-containing silicon dioxide powder, and mix the obtained modified fluorine-containing silicon dioxide powder and the remaining raw materials together and then add them to the mixture for mixing, plasticizing, extrusion filtering and impurity removal, calendering, heat extraction, cooling, trimming and rolling to obtain a high-strength seawater-resistant PVC outer film; Preparation of the inner film of the polyester fiber mesh: the polyester fiber mesh is ironed and then dipped and pasted in a paste tank, and then dried and pre-plasticized to obtain the inner film of the polyester fiber mesh; Preparation of 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, then hot-press and laminate them, and then cool them after decoupling and embossing processes to obtain the high-strength seawater-resistant PVC inflatable boat material.

4. The method for preparing a high-strength seawater-resistant PVC inflatable boat material according to claim 3, characterized in that: The paste tank is filled with PVC paste, and 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 in parts by mass.

5. The method for preparing a high-strength seawater-resistant PVC inflatable boat material according to claim 3, characterized in that: The stirring condition in the preparation of the high-strength seawater-resistant PVC outer film is to stir at a speed of 600 to 700 rpm for 30 to 60 seconds, then increase the speed to 1100 to 1500 rpm, and continue stirring for 350 to 450 seconds.

6. The method for preparing a high-strength seawater-resistant PVC inflatable boat material according to claim 3, characterized in that: In the preparation of the high-strength seawater-resistant PVC outer membrane, the temperature of extrusion filtration and impurity removal is set at 130-160°C, and the filter mesh specification for impurity removal is 100-150 meshes.

7. The method for preparing a high-strength seawater-resistant PVC inflatable boat material according to claim 3, characterized in that: The pre-plasticizing temperature in the preparation of the polyester fiber mesh inner film is 140-150°C.

8. The method for preparing a high-strength seawater-resistant PVC inflatable boat material according to claim 3, characterized in that: The hot pressing temperature of high-strength seawater-resistant PVC inflatable boat materials is 165-175°C, and the laminating pressure is 25-45kgf / cm 2 .