Polyvinyl chloride material and preparation method thereof

Abstract

The present application discloses a polyvinyl chloride material, which comprises, by mass: 55 to 65 parts of polyvinyl chloride, 10 to 25 parts of a plasticizer, 1 to 6 parts of a stabilizer, 0.5 to 1.5 parts of an anti-UV agent, 0.5 to 1.5 parts of a lubricant, 4 to 8 parts of a flame retardant, 5 to 15 parts of an ethylene-vinyl acetate copolymer elastomer, 1 to 3 parts of a processing aid, and 0.2 to 0.5 parts of a toner; the anti-UV agent comprises a combination of 2-(2H-benzotriazole-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol and 3,5-di-tert-butyl-4-hydroxybenzoate hexadecyl. The addition of ethylene-vinyl acetate copolymer as part of the plasticizer system reduces the risk of adhesive performance degradation caused by plasticizer precipitation and mixing with hot-melt adhesive, thereby extending the service life of the fixed position; the use of two anti-UV agents in combination can effectively improve the weather resistance of the material, reduce UV-induced yellowing, and thus extend the service life of the transparent optical fiber broadband.

Description

Technical Field

[0001] The present application relates to the field of polymer materials, and in particular to a polyvinyl chloride material and a preparation method thereof. Background Art

[0002] Optical fibers are mostly white or other colorful non-transparent materials. However, in the field of home broadband wiring, transparent optical fibers make optical fiber wiring almost imperceptible to the naked eye, thus maintaining the beauty of the interior. The diameter of this transparent optical fiber is only 0.9 mm and it can be bent 90 degrees. Although the price is higher than that of ordinary optical fibers, it provides better concealment and convenience. Transparent optical fibers are more transparent than ordinary optical fibers, so the choice of base material is also different. Polyvinyl chloride (PVC) is a commonly used material for optical fibers.

[0003] Most of the existing polyvinyl chloride optical fiber materials are solid color. Transparent PVC materials are prepared by mixing materials with similar refractive indices to the base materials. Solid color PVC materials have no requirements for refractive index. There is no transparent PVC material that can simultaneously meet the physical property requirements such as diameter, transparency, and aging resistance for use as broadband optical fiber.

[0004] Therefore, developing a polyvinyl chloride material that can meet the requirements of high transparency, UV resistance and strong anti-aging performance is a problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] In view of this, the present application provides a polyvinyl chloride material that has UV resistance, flame retardancy, water boiling resistance, aging resistance and transparency requirements.

[0006] Broadband transparent fiber is a new type of fiber optic technology that offers enhanced transparency and bend resistance. This fiber makes wiring in homes and businesses more convenient and discreet, as it can be quickly routed to doors, windows, corners, skirtings, beams, and other areas, eliminating the need for post-renovation installation. The advantage of transparent fiber is that it can be hot-melt-fastened to the wall without disrupting the aesthetics, making installation both convenient and discreet.

[0007] The present application provides a polyvinyl chloride material, comprising, by mass: 55 to 65 parts of polyvinyl chloride, 10 to 25 parts of a plasticizer, 1 to 6 parts of a stabilizer, 0.5 to 1.5 parts of an anti-UV agent, 0.5 to 1.5 parts of a lubricant, 4 to 8 parts of a flame retardant, 5 to 15 parts of an ethylene-vinyl acetate copolymer elastomer, 1 to 3 parts of a processing aid, and 0.2 to 0.5 parts of a color powder;

[0008] The anti-UV agents include 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol (UV-234) and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl (UV-2908).

[0009] The present application compounds the polyvinyl chloride material with 55 to 65 parts of polyvinyl chloride, 10 to 25 parts of plasticizer, 1 to 6 parts of stabilizer, 0.5 to 1.5 parts of anti-UV agent, 0.5 to 1.5 parts of lubricant, 4 to 8 parts of flame retardant, 5 to 15 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 3 parts of processing aid and 0.2 to 0.5 parts of color powder raw material, thereby reducing the risk of degradation of adhesive performance of optical fiber due to plasticizer precipitation and mixing with hot melt adhesive, effectively improving the weather resistance of the material, reducing yellowing caused by UV, and thus extending the service life of the fixed position.

[0010] The polyvinyl chloride material provided herein includes a UV inhibitor comprising 2-(2H-benzotriazole-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol (UV-234) and hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate (UV-2908). The UV inhibitor, a combination of UV-2908 and UV-234, effectively improves the material's weather resistance while barely affecting the polyvinyl chloride's transparency and reducing UV-induced yellowing, thereby extending the service life of the transparent optical fiber broadband.

[0011] In some specific implementations, the weight fraction of the anti-UV agent is 0.5 to 1.5 parts, and may be 0.5, 0.8, 0.9, 1, 1.1, 1.2, 1.3, or 1.5 parts. In some specific implementations, the weight ratio of 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol to 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl is 1:(0.5-2), preferably 1:(0.8-1.5).

[0012] The polyvinyl chloride material provided herein includes an ethylene-vinyl acetate copolymer elastomer. In some specific implementations, the weight percentage of the ethylene-vinyl acetate copolymer elastomer is 5 to 15 parts, and may be 5, 6, 8, 10, 11, 12, or 15 parts, preferably 8 to 10 parts. The use of ethylene-vinyl acetate copolymer elastomer (EVA) imparts flexibility to the material while reducing the amount of plasticizer used. This reduces the risk of adhesive degradation caused by plasticizer precipitation and mixing with hot-melt adhesive in the optical fiber, thereby extending the service life of the fixed position.

[0013] The polyvinyl chloride material provided herein includes polyvinyl chloride. In some specific implementations, the polyvinyl chloride has a number average molecular weight of 50,000 to 100,000, preferably 50,000 to 80,000.

[0014] In some specific implementations, the mass fraction of the polyvinyl chloride is 55 to 65 parts, which can be 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, or 65 parts, and is preferably 58 to 62 parts.

[0015] The polyvinyl chloride material provided herein includes a plasticizer. In some specific implementations, the plasticizer includes but is not limited to one or more of trioctyl trimellitate, dioctyl terephthalate, or polyester W-8000. The present application has no special requirements for the selection of the plasticizer.

[0016] In some specific implementations, the mass fraction of the plasticizer is 10 to 25 parts, which can be 10 parts, 12 parts, 13 parts, 14 parts, 15 parts, 18 parts, 20 parts, 22 parts, 24 parts, 25 parts, and preferably 18 to 21 parts.

[0017] The polyvinyl chloride material provided herein includes a stabilizer. In some specific implementations, the stabilizer includes but is not limited to an organotin and / or calcium zinc stabilizer. The present application has no special requirements for the selection of the stabilizer, and calcium zinc stabilizer is preferred.

[0018] In some specific implementations, the mass fraction of the stabilizer is 1 to 6 parts, and can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, and preferably 1.8 to 5 parts.

[0019] The polyvinyl chloride material provided herein includes a lubricant. In some specific implementations, the lubricant includes an external lubricant and an internal lubricant. The external lubricant includes, but is not limited to, high-density oxidized polyethylene wax, and the internal lubricant includes, but is not limited to, a polyol fatty acid complex ester liquid. The present application has no specific requirements for the selection of the external and internal lubricants.

[0020] In some specific implementations, the mass fraction of the lubricant is 0.5 to 1.5 parts, and can be 0.5, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.5, and preferably 0.7 to 0.9 parts.

[0021] The polyvinyl chloride material provided herein includes a flame retardant. In some specific implementations, the flame retardant includes a phosphate ester, and the flame retardant is a low-odor liquid phosphate ester, which improves the flame retardancy of the material while hardly affecting its transparency.

[0022] In some specific implementations, the mass fraction of the flame retardant is 4 to 8 parts, and can be 4, 5, 6, 7, or 8 parts, and is preferably 5 to 6 parts.

[0023] The polyvinyl chloride material provided herein includes a processing aid. In some specific implementations, the processing aid includes, but is not limited to, an ACR material. This application has no specific requirements for the selection of the processing aid. The processing aid selected is ACR material PA-20 from Suzuki Japan, which promotes the plasticization of transparent PVC materials and effectively improves the transparency and brightness of the transparent PVC.

[0024] In some specific implementations, the mass fraction of the processing aid is 1 to 3 parts, and can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, and preferably 1 to 2 parts.

[0025] The polyvinyl chloride material provided in the present application includes a color powder. In some specific implementations, the color powder includes but is not limited to one or more of ultramarine blue, ultramarine violet, or a fluorescent whitening agent. The present application has no special requirements for the selection of the color powder.

[0026] In some specific implementations, the mass fraction of the color powder is 0.2 to 0.5 parts, and can be 0.2, 0.3, 0.4, or 0.5 parts, and is preferably 0.3 to 0.4 parts.

[0027] In some specific implementations, the polyvinyl chloride material further comprises, by weight, 0.5 to 1 part antioxidant and 1 to 3 parts auxiliary stabilizer. In some specific implementations, the antioxidant includes, but is not limited to, hindered phenol antioxidants and / or phosphite antioxidants. This application has no specific requirements for the selection of antioxidants. In some specific implementations, the hindered phenol antioxidants include, but are not limited to, 2,6-di-tert-butyl-4-methylphenol, Antioxidant 1010, or Antioxidant 1076. In some specific implementations, the phosphite antioxidants include, but are not limited to, phenol-free phosphite antioxidants, low-phenol phosphite antioxidants, or phenol-containing phosphite antioxidants. The auxiliary stabilizer includes, but is not limited to, soybean oil. This application has no specific requirements for the selection of auxiliary stabilizers. The transparent optical fiber made from the polyvinyl chloride material meets the physical property requirements while providing improved concealment and convenience.

[0028] In some specific implementations, the plasticizer includes polyester W-8000; the stabilizer includes calcium zinc stabilizer. In some specific implementations, the polyvinyl chloride material includes, by weight, 58 to 62 parts polyvinyl chloride, 18 to 21 parts plasticizer, 3 to 5 parts stabilizer, 0.5 to 1 part UV inhibitor, 0.7 to 0.9 parts lubricant, 5 to 6 parts flame retardant, 8 to 10 parts ethylene-vinyl acetate copolymer elastomer, 1 to 2 parts processing aid, and 0.3 to 0.4 parts toner.

[0029] The present application also provides a method for preparing a polyvinyl chloride material, comprising:

[0030] Polyvinyl chloride, plasticizer, stabilizer, anti-UV agent, lubricant, flame retardant and color powder are mixed and stirred, and then mixed with ethylene-vinyl acetate copolymer elastomer and processing aid and extruded to obtain polyvinyl chloride material.

[0031] In the present application, polyvinyl chloride, a plasticizer, a stabilizer, an anti-UV agent, a lubricant, a flame retardant, and a toner are first mixed and stirred to obtain a mixture A. In some specific implementations, the stirring temperature is 110°C to 130°C. In some specific implementations, the polyvinyl chloride, stabilizer, anti-UV agent, and lubricant are first mixed uniformly, and the plasticizer is added while stirring. After the temperature is raised to 110°C to 130°C, the flame retardant and toner are added.

[0032] The present application then extrude the mixture a with an ethylene-vinyl acetate copolymer elastomer and a processing aid to obtain a polyvinyl chloride material. In some specific implementations, the extrusion temperature is 140° C. to 160° C. In some specific implementations, the extrusion is performed in a screw extruder.

[0033] This application incorporates ethylene-vinyl acetate copolymer as part of the plasticizer system, reducing the risk of adhesive degradation caused by plasticizer precipitation and mixing with the hot-melt adhesive, thereby extending the service life of the fixed position. The use of two UV agents, UV-2908 and UV-234, effectively improves the material's weather resistance and reduces UV-induced yellowing, thereby extending the service life of the transparent optical fiber broadband. DETAILED DESCRIPTION

[0034] It should be understood that the expression "one or more of" includes individually each of the items recited after the expression and various combinations of two or more of the recited items, unless otherwise apparent from the context and usage. The expression "and / or" in conjunction with three or more recited items should be understood to have the same meaning, unless otherwise apparent from the context.

[0035] The terms "comprising", "having" or "containing", including their grammatical synonyms, should generally be understood as open and non-restrictive, e.g., not excluding other unrecited elements or steps, unless otherwise specifically stated or understood from the context.

[0036] It should be understood that the order of steps or the order in which certain actions are performed is not important as long as the application remains operable. Additionally, two or more steps or actions may be performed simultaneously.

[0037] The use of any and all examples or exemplary language, such as "such as" or "including," herein is intended merely to better illustrate the present application and does not limit the scope of the present application unless otherwise claimed. No language in this specification should be construed as indicating any non-claimed element as essential to the practice of the present application.

[0038] In addition, the numerical ranges and parameters used to define this application are approximate values. The relevant numerical values ​​in the specific examples have been presented as accurately as possible. However, any numerical value inherently inevitably contains standard deviations due to individual testing methods. Therefore, unless otherwise expressly stated, all ranges, amounts, values, and percentages used in this disclosure should be understood to be modified by the word "about." As used herein, "about" generally means that the actual value is within plus or minus 10%, 5%, 1%, or 0.5% of a particular value or range.

[0039] The present application is further described below with reference to the following examples. The scope of protection of the present application is not limited by the following examples.

[0040] Example 1

[0041] This embodiment provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 18 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts each of UV inhibitors UV-2908 and UV-234, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0042] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 and EVA elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0043] Example 2

[0044] This embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of TOTM plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts each of UV inhibitors UV-2908 and UV-234, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0045] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 and EVA elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0046] Example 3

[0047] This embodiment provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 18 parts of W-8000 plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts each of UV inhibitors UV-2908 and UV-234, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0048] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 and EVA elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0049] Example 4

[0050] This embodiment provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 18 parts of W-8000 plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts each of UV inhibitors UV-2908 and UV-234, 0.7 parts of lubricant, 10 parts of EVA HP741 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0051] The preparation method is consistent with that of Example 4.

[0052] Example 5

[0053] This embodiment provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 21 parts of DOTP plasticizer, 1.8 parts of organotin stabilizer, 0.5 parts each of UV inhibitors UV-2908 and UV-234, 0.9 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0054] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 and EVA elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0055] Example 6

[0056] This embodiment provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 21 parts of DOTP plasticizer, 1.8 parts of organotin stabilizer, 0.5 parts each of UV inhibitors UV-2908 and UV-234, 0.9 parts of lubricant, 10 parts of EVA HP741 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0057] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 and EVA elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0058] Comparative Example 1

[0059] This embodiment provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 18 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 1 part of UV-234 anti-UV agent, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0060] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. Once the plasticizer is fully added, the stirring rate is increased. When the temperature reaches 120°C, flame retardant and colorant are added in sequence. After mixing evenly, PA-20 and EVA HP441 elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in an extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set at 140-160°C.

[0061] Comparative Example 2

[0062] This embodiment provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 18 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 1 part of UV-2908 anti-UV agent, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0063] Preparation method: PVC, stabilizer, UV-2908 anti-UV agent, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 and EVA HP441 elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0064] Comparative Example 3

[0065] This embodiment provides a polyvinyl chloride material, which includes, by mass: 64 parts of polyvinyl chloride, 22 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts each of UV anti-UV agents UV-2908 and UV-234, 0.7 parts of lubricant, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0066] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 is added when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0067] Comparative Example 4

[0068] This comparative example provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 22 parts of DOTP plasticizer, 1.8 parts of organic tin stabilizer, 0.9 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0069] Preparation method: PVC, stabilizer, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. Once the plasticizer is fully added, the stirring rate is increased. When the temperature reaches 120°C, flame retardant and colorant are added in sequence. After mixing evenly, PA-20 and EVA HP441 elastomer are added in sequence when the temperature reaches 125°C. After mixing evenly, the mixture is placed in an extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set at 140-160°C.

[0070] Comparative Example 5

[0071] This comparative example provides a polyvinyl chloride material, which includes, by mass: 65 parts of polyvinyl chloride, 24 parts of DOTP plasticizer, 1.8 parts of organic tin stabilizer, 0.9 parts of lubricant, 0.5 parts each of UV anti-UV agents UV-2908 and UV-234, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0072] Preparation method: PVC, stabilizer, UV inhibitor, and lubricant are added to a mixing tank in sequence and mixed evenly. Plasticizer is added while stirring. After the plasticizer is completely added, the stirring speed is increased. When the temperature reaches 120°C, flame retardant and color powder are added in sequence. After mixing evenly, PA-20 is added when the temperature reaches 125°C. After mixing evenly, the mixture is placed in the extruder hopper and extruded through a screw extruder to produce PVC material. The extruder screw temperature is set to 140-160°C.

[0073] Comparative Example 6

[0074] This comparative example provides a polyvinyl chloride material, which includes, by mass: 58 parts of polyvinyl chloride, 18 parts of W-8000 plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts each of UV anti-UV agents UV-2908 and UV-531, 0.7 parts of lubricant, 10 parts of EVA HP741 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0075] The preparation method is consistent with that of Example 4.

[0076] The performance tests of the polyvinyl chloride materials prepared in Examples 1-6 and Comparative Examples 1-6 were carried out using the following test methods:

[0077] Tensile strength: test method refers to GB / T 1040;

[0078] Elongation at break: test method refers to GB / T 1040;

[0079] UV color difference △E, residual tensile strength after UV, residual elongation at break after UV: ISO 4892-2cycle 5, irradiated with a xenon arc lamp (340nm), with an illumination intensity of 0.45W / m 2 / nm, 102 minutes of light exposure at 65±3℃ (50%±RH), 18 minutes of spraying and light exposure; a total of 500 hours, mechanical properties should be no less than 50% of the previous ones, and color difference should be ≤6. The test method refers to ISO 105-A02;

[0080] Precipitation after boiling: No obvious precipitation on the surface after boiling at 70℃*168H;

[0081] Color difference △E after aging, residual rate of tensile strength after aging, residual rate of elongation at break after aging: 85℃*500H, color difference value ≤6, residual rate of tensile elongation ≥75%;

[0082] Transparency: 2mm sheet transparency ≥80%, test method refers to ASTM D1003;

[0083] Flame retardant performance: 1.5mm flame retardant V0, test method refers to UL94.

[0084] The test results are shown in Table 1-2.

[0085] Table 1

[0086]

[0087] Table 2

[0088]

[0089]

[0090] As can be seen from Tables 1-2, the polyvinyl chloride material prepared using the technical solution of the present application has obvious improvements in anti-aging, anti-ultraviolet and transparency. Compared with the embodiment, no anti-UV agent is added to Comparative Example 4. It can be seen that the anti-UV performance of the system of Comparative Example 4 is significantly worse. At the same time, the effect of using a single anti-UV agent in Comparative Examples 1-2 is significantly worse than the effect of using the two anti-UV agents described in the present application at the same time. Comparative Example 6 uses a combination of compound anti-UV agents that are not in this technical solution, and its performance is also significantly reduced compared with the embodiment. Because different types of anti-UV agents have different absorption degrees in the ultraviolet band, their temperature resistance is also different. The selected materials are the most suitable for the anti-UV test conditions and evaluation methods described in the present invention. Without the addition of EVA elastomer, the precipitation of Comparative Examples 3 and 5 after boiling in water is significantly worse, which is not conducive to subsequent use.

[0091] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and application concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A polyvinyl chloride material, characterized in that: The composition comprises, by mass: 55 to 65 parts of polyvinyl chloride, 10 to 25 parts of plasticizer, 1 to 6 parts of stabilizer, 0.5 to 1.5 parts of anti-UV agent, 0.5 to 1.5 parts of lubricant, 4 to 8 parts of flame retardant, 5 to 15 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 3 parts of processing aid and 0.2 to 0.5 parts of color powder; The anti-UV agent includes 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl; The mass ratio of the 2-(2H-benzotriazole-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol to 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl is 1:(0.5-2).

2. The polyvinyl chloride material according to claim 1, characterized in that The number average molecular weight of the polyvinyl chloride is 50,000 to 100,000.

3. The polyvinyl chloride material according to claim 1, characterized in that The plasticizer includes one or more of trioctyl trimellitate, dioctyl terephthalate or polyester W-8000; the stabilizer includes organic tin and / or calcium zinc stabilizer; the lubricant includes an external lubricant and an internal lubricant; the external lubricant includes high-density oxidized polyethylene wax, and the internal lubricant includes a polyol fatty acid complex ester liquid; the flame retardant includes phosphate ester; and the processing aid includes ACR material.

4. The polyvinyl chloride material according to claim 1, characterized in that The polyvinyl chloride material further comprises, by weight, 0.5 to 1 part of an antioxidant and 1 to 3 parts of an auxiliary stabilizer.

5. The polyvinyl chloride material according to claim 4, characterized in that The antioxidant includes hindered phenol antioxidant and / or phosphite antioxidant; the auxiliary stabilizer includes soybean oil.

6. The polyvinyl chloride material according to claim 1, characterized in that The plasticizer includes polyester W-8000; the stabilizer includes calcium zinc stabilizer.

7. The polyvinyl chloride material according to claim 1, characterized in that The composition comprises, by mass, 58 to 62 parts of polyvinyl chloride, 18 to 21 parts of plasticizer, 3 to 5 parts of stabilizer, 0.5 to 1 part of anti-UV agent, 0.7 to 0.9 part of lubricant, 5 to 6 parts of flame retardant, 8 to 10 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 2 parts of processing aid and 0.3 to 0.4 parts of color powder.

8. The method for preparing the polyvinyl chloride material according to any one of claims 1 to 7, characterized in that: include: Polyvinyl chloride, plasticizer, stabilizer, anti-UV agent, lubricant, flame retardant and color powder are mixed and stirred, and then mixed with ethylene-vinyl acetate copolymer elastomer and processing aid and extruded to obtain polyvinyl chloride material.

9. The preparation method according to claim 8, characterized in that The stirring temperature is 110°C to 130°C; the extrusion temperature is 140°C to 160°C.

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