Flame-retardant thin film material with arc light preventing and eye protecting functions as well as preparation method and application of flame-retardant thin film material

Abstract

The invention relates to the field of polymer functional materials, and discloses a flame-retardant film material with arc light preventing and eye protecting functions as well as a preparation method and application of the flame-retardant film material. According to the invention, a five-layer composite structure is formed by utilizing a multi-layer co-extrusion composite process and a unique component formula of each layer, so that the flame-retardant film material is prepared. The five-layer composite structure comprises a blending modified base layer, an arc light preventing eye protection layer and a blending modified flame-retardant layer. The functional polyvinyl chloride film provided by the invention realizes the spanning from a single function of a transparent film to multiple functions, and has the advantages of excellent performance, simple process, low cost and wide application prospect.

Description

Technical Field

[0001] The invention relates to the field of polymer functional materials, and comprises a flame retardant film material with arc-proof eye-protection function, a preparation method and application thereof. Background Art

[0002] In a welding workshop, in addition to welders who are welding directly but wearing protective masks, there are other workers present. They may not be able to stay away from the welding area due to work needs, but they do not need to face the strong arc light directly. Therefore, they also need a protective measure that is different from the protective mask but equally effective to protect their eyes from harm.

[0003] Door curtains are an option. As a common partition and decorative item, door curtains not only block sight and maintain privacy, but also have certain heat preservation and sound insulation effects. However, traditional door curtain materials such as cloth and ordinary plastics often have problems such as flammability, which limits their application range.

[0004] In view of the special needs of electric welding operations, it is urgent to develop a new type of door curtain material. This material needs to have arc-proof eye protection function and flame retardant properties; this can not only provide comprehensive eye protection for other workers in the welding workshop, but also improve the overall safety of the workplace to deal with possible fire risks.

[0005] A Chinese patent with publication number CN 115991023 A discloses a flame-retardant polypropylene composite film, its preparation method and application. The polypropylene composite film includes at least one film layer A formed by a polypropylene composition A, at least one film layer B formed by a polypropylene composition B and at least one film layer C formed by a polypropylene composition C; wherein the polypropylene composition A includes homopolymer polypropylene a, propylene impact copolymer b and polyolefin elastomer c, the polypropylene composition B includes random polypropylene x and optional polyolefin elastomer y, and the polypropylene composition C includes polypropylene m and flame retardant n. The composite film of the invention has good impact resistance, tensile properties and flame retardant properties at the same time, and has good heat sealing strength at a lower heat sealing temperature. However, the flame-retardant polypropylene composite film provided by the invention lacks functions such as arc protection and eye protection, and the structure is not a five-layer composite structure, and the composition formula is also very different. Summary of the invention

[0006] In summary, the present invention aims to provide a flame-retardant film material with arc-proof eye protection function, and a preparation method and use thereof. Through a multi-layer co-extrusion composite process and a unique formulation of the components of each layer, a blended modified base layer, an arc-proof eye protection layer and a blended modified flame-retardant layer are compounded to form a five-layer composite structure, thereby preparing a flame-retardant film material with arc-proof eye protection function, and using the flame-retardant film material to prepare a flame-retardant door curtain with arc-proof eye protection function.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions: In the first aspect, the present application provides a flame-retardant film material with arc-proof eye protection function. The film material comprises a five-layer composite structure, which comprises a blended modified base layer, two arc-proof eye protection layers bonded to both sides of the surface of the blended modified base layer, and two blended modified flame-retardant layers bonded to the surface of the arc-proof eye protection layer away from the blended modified base layer; the blended modified base layer comprises polyvinyl chloride and polyethylene glycol; the arc-proof eye protection layer comprises polyvinyl chloride, polyvinyl pyrrolidone and ultraviolet absorber; the blended modified flame-retardant layer comprises polyvinyl chloride, polyvinyl alcohol and ultraviolet absorber.

[0008] In a second aspect, the present application provides a method for preparing a flame-retardant film material having an arc-proof eye protection function. The method for preparing a flame-retardant film material having an arc-proof eye protection function comprises: The raw materials of the blended modified base layer, the arc-proof eye protection layer and the blended modified flame-retardant layer are mixed in a three-roll grinder for 1 hour according to the formula to obtain a blended modified base layer mixture, an arc-proof eye protection layer mixture and a blended modified flame-retardant layer mixture respectively; Then, the prepared mixed materials of each layer are extruded and granulated in three twin-screw extruders to obtain the blended modified base layer granules, arc-proof eye protection layer granules and blended modified flame-retardant layer granules respectively under the control of set temperature; Finally, a multi-layer co-extrusion composite device is used to co-extrude the prepared layers of pellets under set parameters to blow film, and after cooling and molding, a flame-retardant film material with arc-proof and eye-protection functions is obtained.

[0009] In a third aspect, the present application provides a use of a flame-retardant film material with an arc-proof eye-protection function, wherein the flame-retardant film material is used to prepare a flame-retardant door curtain with an arc-proof eye-protection function.

[0010] Beneficial technical effects: The flame retardant film material with arc protection eye protection function prepared in the present application comprises a unique five-layer composite structure, which comprises a blended modified base layer, two arc protection eye protection layers bonded to both sides of the surface of the blended modified base layer, and two blended modified flame retardant layers bonded to the surface of the arc protection eye protection layer away from the blended modified base layer. This unique five-layer composite structure first ensures that the film material has better flame retardant properties than a single-layer or few-layer film.

[0011] In the arc-proof eye protection layer, polyvinyl chloride and polyvinyl pyrrolidone are both polar polymers. Since the two have similar polarities, they have good compatibility. Therefore, the ultraviolet absorber and other additives can be well and evenly dispersed in the arc-proof eye protection layer, so that the arc-proof eye protection layer has a good arc-proof effect. Moreover, the pyrrolidone ring in polyvinyl pyrrolidone can absorb ultraviolet rays, so it can be combined with ultraviolet absorbers to further enhance the arc-proof effect.

[0012] In the blended modified flame retardant layer, polyvinyl chloride and polyvinyl alcohol also have good compatibility due to their similar polarity; therefore, flame retardants, ultraviolet absorbers and other additives can also be well dispersed in the blended modified flame retardant layer, which improves the flame retardant effect of the blended modified flame retardant layer. At the same time, the ultraviolet absorber further makes the blended modified flame retardant layer have certain arc protection performance, so that the arc passing through the blended modified flame retardant layer is reduced in intensity before reaching the arc protection eye protection layer.

[0013] Finally, due to the presence of a large number of oxygen atoms and nitrogen atoms, the polyvinyl pyrrolidone in the arc protection eye protection layer can form a large number of hydrogen bonds with the oxygen atoms in the polyethylene glycol in the blended modified base layer and the oxygen atoms in the polyvinyl alcohol in the blended modified flame retardant layer, so that the layers of the five-layer composite structure can be more firmly bonded together.

[0014] The flame-retardant film material with arc-proof eye-protection function prepared in the present application has excellent performance, simple process, low cost, broad market value and application prospects; and it can be used to make flame-retardant door curtains with arc-proof eye-protection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the five-layer structure of a flame-retardant film material with arc-proof and eye-protection functions.

[0016] Figure 2 The present invention is a flow chart of a method for preparing a flame retardant film material with arc protection and eye protection functions.

[0017] The meanings of the reference numerals in the figures are: 1. Blending modified base layer; 2. Arc-proof eye protection layer; 3. Blending modified flame retardant layer; 4. Ultraviolet absorber. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application is further described in detail below in conjunction with the embodiments. However, this should not be understood as the scope of the present application being limited to the following examples. Without departing from the above-mentioned method ideas of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0019] Figure 1 In the schematic diagram of the multi-layer structure shown, the position of the ultraviolet absorber distributed in the blended modified flame retardant layer is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the ultraviolet absorber must have a specific orientation and be distributed in the blended modified flame retardant layer in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0020] In addition, the terms used in the present application are for the purpose of describing particular embodiments only and are not intended to be limiting of the present application.

[0021] As used in this application and the appended claims, the singular forms "for," "or," "an," "any," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0022] The terms “first”, “second” and “third”, if used, are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0023] First, as Figure 1 As shown, the present application provides a flame-retardant film material with arc-proof eye protection function. The film material comprises a five-layer composite structure, which comprises a blended modified base layer 1, two arc-proof eye protection layers 2 bonded to both sides of the surface of the blended modified base layer 1, and two blended modified flame-retardant layers 3 bonded to the surface of the arc-proof eye protection layer 2 away from the blended modified base layer 1; the blended modified base layer 1 comprises polyvinyl chloride and polyethylene glycol; the arc-proof eye protection layer 2 comprises polyvinyl chloride, polyvinyl pyrrolidone and ultraviolet absorber 4; the blended modified flame-retardant layer 3 comprises polyvinyl chloride, polyvinyl alcohol and ultraviolet absorber 4.

[0024] Preferably, the mass ratio of polyvinyl chloride, polyethylene glycol, plasticizer, stabilizer and filler in the blended modified base layer 1 is (30-50): (10-20): (10-25): (1-5): (10-30).

[0025] The mass ratio of polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber, plasticizer, stabilizer and filler in the arc protection layer 2 is (40-50): (10-20): (10-20): (15-20): (1-5): (1-5).

[0026] The mass ratio of polyvinyl chloride, polyvinyl alcohol, plasticizer, flame retardant, stabilizer, filler and ultraviolet absorber in the blended modified flame retardant layer 3 is (30-40): (20-30): (15-35): (5-10): (1-5): (1-5): (5-10).

[0027] Preferably, the plasticizer includes one or more of dioctyl phthalate, dioctyl terephthalate, dibutyl phthalate, dioctyl adipate, tricresyl phosphate, epoxy soybean oil and epoxy linseed oil; the epoxy value of the epoxy soybean oil and epoxy linseed oil ranges from 3% to 6%.

[0028] Preferably, the stabilizer comprises one or more of dibutyltin dilaurate, octyltin maleate and calcium zinc stabilizer.

[0029] Preferably, the filler comprises one or more of calcium carbonate, barium sulfate, talc and kaolin.

[0030] Preferably, the flame retardant includes one or more of aluminum hydroxide, triphenyl phosphate, tricresyl phosphate and trioctylphosphine oxide.

[0031] Preferably, the ultraviolet absorber comprises one or more of nano titanium dioxide and nano zinc oxide; the particle size of the nano titanium dioxide and nano zinc oxide is in the range of 20-50 nm.

[0032] Compared with the existing flame-retardant door curtains, the present application uses a multi-layer co-extrusion composite process and the above-mentioned unique formulation of the components of each layer to compound the blended modified base layer, the blended modified flame-retardant layer and the anti-arc eye protection layer to prepare a flame-retardant film material with a five-layer composite structure and anti-arc eye protection function.

[0033] Second, as Figure 2 As shown, the present application provides a method for preparing a flame retardant film material with arc light protection and eye protection function, comprising: The raw materials of the blended modified base layer, the arc-proof eye protection layer and the blended modified flame-retardant layer are mixed in a three-roll grinder for 1 hour according to the formula to obtain a blended modified base layer mixture, an arc-proof eye protection layer mixture and a blended modified flame-retardant layer mixture respectively; Then, the prepared mixed materials of each layer are extruded and granulated in three twin-screw extruders to obtain the blended modified base layer granules, arc-proof eye protection layer granules and blended modified flame-retardant layer granules respectively under the control of set temperature; Finally, a multi-layer co-extrusion composite device is used to co-extrude the prepared layers of pellets under set parameters to blow film, and after cooling and molding, a flame-retardant film material with arc-proof and eye-protection functions is obtained.

[0034] Preferably, the set temperature control during the extrusion granulation includes: the temperature of the rear section of the barrel of the three twin-screw extruder granulators is controlled at 165-185°C, and the temperature of the front section of the barrel is controlled at 180-200°C.

[0035] Preferably, the setting parameters for the co-extrusion blown film include: the co-extrusion head temperature of the multi-layer co-extrusion composite equipment is controlled at 180-200°C; the blow-up ratio is 2.5-3.0, the screw speed is 25-35r / min, and the traction speed is 15-40m / min.

[0036] In a third aspect, the present application provides a use of a flame-retardant film material with an arc-proof eye-protection function, wherein the flame-retardant film material is used to prepare a flame-retardant door curtain with an arc-proof eye-protection function.

[0037] The sources of experimental raw materials used in the present invention are as follows: Polyvinyl chloride: Jiangsu Bosite Chemical Technology Co., Ltd.; Plasticizer: Guangzhou Yuanda New Materials Co., Ltd. Stabilizer: Jiangsu Bosite Chemical Technology Co., Ltd.; Filler: Jiangsu Bosite Chemical Technology Co., Ltd.; Flame retardant: Jiangsu Bosite Chemical Technology Co., Ltd.; Ultraviolet light absorber: Shanghai MacLean Biochemical Technology Co., Ltd.

[0038] The following will combine different examples to specifically describe a flame-retardant film material with arc-proof eye-protection function provided by the present application, as well as its preparation method and use.

[0039] Embodiment 1: like Figure 2 As shown, a method for preparing a flame retardant film material with arc protection and eye protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture, an arc protection eye protection layer mixture, and a blended modified flame retardant layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (dioctyl phthalate), stabilizer (dibutyltin dilaurate), filler (calcium carbonate) have a mass ratio of 42:15:20:3:20; The raw materials of the arc protection eye protection layer: polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber (nano titanium dioxide), plasticizer (tricresyl phosphate), stabilizer (octyl tin maleate), filler (talc) are in a mass ratio of 45:15:15:16:4:5; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, polyvinyl alcohol, plasticizer (dibutyl phthalate), flame retardant (aluminum hydroxide), stabilizer (octyl tin maleate), filler (barium sulfate), ultraviolet absorber (nano titanium dioxide) have a mass ratio of 40:20:20:10:3:2:5; S2, extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 180° C. and the temperature of the front section of the barrel controlled at 190° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, using each layer of pellets prepared in step S2, co-extrusion blown film is carried out under the conditions of the co-extrusion head temperature being controlled at 200°C, the blowing ratio being 2.7, and the pulling speed being 30r / min. After cooling and molding, a five-layer composite structure flame-retardant film material with arc protection and eye protection function is obtained.

[0040] Embodiment 2: like Figure 2 As shown, a method for preparing a flame retardant film material with arc protection and eye protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture, an arc protection eye protection layer mixture, and a blended modified flame retardant layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (dioctyl terephthalate), stabilizer (dibutyltin dilaurate), filler (barium sulfate) in a mass ratio of 45:20:15:5:15; The raw materials of the arc protection eye protection layer: polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber (nano titanium dioxide), plasticizer (dioctyl adipate), stabilizer (calcium zinc stabilizer), filler (talc) are in a mass ratio of 40:20:16:17:4:3; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, polyvinyl alcohol, plasticizer (dibutyl phthalate), flame retardant (aluminum hydroxide), stabilizer (octyl tin maleate), filler (barium sulfate), ultraviolet absorber (nano zinc oxide) have a mass ratio of 35:25:20:8:2:5:5; S2, extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 175° C. and the temperature of the front section of the barrel controlled at 185° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, the pellets of each layer prepared in step S2 are used to carry out co-extrusion blown film under the conditions that the co-extrusion head temperature is controlled at 190°C, the blowing ratio is 2.8, and the pulling speed is 32r / min. After cooling and molding, a five-layer composite structure flame-retardant film material with arc protection and eye protection function is obtained.

[0041] Embodiment 3: like Figure 2 As shown, a method for preparing a flame retardant film material with arc protection and eye protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture, an arc protection eye protection layer mixture, and a blended modified flame retardant layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (dibutyl phthalate), stabilizer (dibutyltin dilaurate), filler (kaolin) in a mass ratio of 40:20:16:4:20; The raw materials of the arc protection eye protection layer: polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber (nano zinc oxide), plasticizer (dioctyl adipate), stabilizer (octyl tin maleate), filler (talc) are in a mass ratio of 50:15:15:12:4:4; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, polyvinyl alcohol, plasticizer (epoxidized soybean oil, epoxy value 3%), flame retardant (triphenyl phosphate), stabilizer (octyl tin maleate), filler (calcium carbonate), ultraviolet absorber (nano zinc oxide) in a mass ratio of 30:30:18:10:2:5:5; S2, extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, controlling the temperature of the rear section of the barrel at 180° C. and the temperature of the front section of the barrel at 200° C., respectively, to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, using each layer of pellets prepared in step S2, co-extrusion blown film is carried out under the conditions of the co-extrusion head temperature being controlled at 195°C, the blowing ratio being 2.9, and the pulling speed being 35r / min. After cooling and molding, a five-layer composite structure flame-retardant film material with arc protection and eye protection function is obtained.

[0042] Embodiment 4: like Figure 2 As shown, a method for preparing a flame retardant film material with arc protection and eye protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture, an arc protection eye protection layer mixture, and a blended modified flame retardant layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (dioctyl phthalate), stabilizer (dibutyltin dilaurate), filler (calcium carbonate) in a mass ratio of 35:20:20:3:22; The raw materials of the arc-proof eye protection layer: polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber (nano titanium dioxide), plasticizer (tricresyl phosphate), stabilizer (octyl tin maleate), filler (talc) have a mass ratio of 48:12:15:16:4:5; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, polyvinyl alcohol, plasticizer (dibutyl phthalate), flame retardant (aluminum hydroxide), stabilizer (octyl tin maleate), filler (barium sulfate), ultraviolet absorber (nano titanium dioxide) have a mass ratio of 35:20:20:8:5:2:10; S2, respectively extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 165° C. and the temperature of the front section of the barrel controlled at 190° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, using each layer of pellets prepared in step S2, co-extrusion blown film is carried out under the conditions of the co-extrusion head temperature being controlled at 185°C, the blowing ratio being 2.8, and the pulling speed being 30r / min. After cooling and molding, a five-layer composite structure flame-retardant film material with arc protection and eye protection function is obtained.

[0043] Embodiment 5: like Figure 2 As shown, a method for preparing a flame retardant film material with arc protection and eye protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture, an arc protection eye protection layer mixture, and a blended modified flame retardant layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (dioctyl terephthalate), stabilizer (dibutyltin dilaurate), filler (barium sulfate) in a mass ratio of 48:20:15:1:16; The raw materials of the arc-proof eye protection layer: polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber (nano zinc oxide), plasticizer (dioctyl adipate), stabilizer (octyl tin maleate), filler (talc) have a mass ratio of 42:18:19:16:2:3; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, polyvinyl alcohol, plasticizer (epoxidized soybean oil, epoxy value 5%), flame retardant (triphenyl phosphate), stabilizer (octyl tin maleate), filler (calcium carbonate), ultraviolet absorber (nano zinc oxide) in a mass ratio of 30:22:18:10:5:5:10; S2, extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 175° C. and the temperature of the front section of the barrel controlled at 200° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, the pellets of each layer prepared in step S2 are used to carry out co-extrusion blown film under the conditions that the co-extrusion head temperature is controlled at 190°C, the blowing ratio is 2.6, and the pulling speed is 28r / min. After cooling and molding, a five-layer composite structure flame-retardant film material with arc protection and eye protection function is obtained.

[0044] Embodiment 6: like Figure 2 As shown, a method for preparing a flame retardant film material with arc protection and eye protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture, an arc protection eye protection layer mixture, and a blended modified flame retardant layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (tricresyl phosphate), stabilizer (dibutyltin dilaurate), filler (kaolin) have a mass ratio of 35:15:20:3:27; The raw materials of the arc protection eye protection layer: polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber (nano titanium dioxide), plasticizer (dioctyl adipate), stabilizer (octyl tin maleate), filler (talc) are in a mass ratio of 44:14:17:18:4:3; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, polyvinyl alcohol, plasticizer (epoxidized soybean oil, epoxy value 6%), flame retardant (aluminum hydroxide), stabilizer (octyl tin maleate), filler (barium sulfate), ultraviolet absorber (nano zinc oxide) are in a mass ratio of 30:25:24:9:4:3:5; S2, respectively extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 185° C. and the temperature of the front section of the barrel controlled at 195° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, using each layer of pellets prepared in step S2, co-extrude and blow film under the conditions of co-extrusion head temperature controlled at 200°C, a blowing ratio of 2.8, and a pulling speed of 32r / min, and after cooling and molding, a five-layer composite structure flame retardant film material with arc protection and eye protection function is obtained.

[0045] Comparative Example 1: A method for preparing a flame-retardant film material with arc-proof eye-protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture and an arc protection eye protection layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (dioctyl phthalate), stabilizer (dibutyltin dilaurate), filler (calcium carbonate) have a mass ratio of 42:15:20:3:20; The raw materials of the arc protection eye protection layer: polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber (nano titanium dioxide), plasticizer (tricresyl phosphate), stabilizer (octyl tin maleate), filler (talc) are in a mass ratio of 45:15:15:16:4:5; S2, extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 180° C. and the temperature of the front section of the barrel controlled at 190° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, the pellets of each layer prepared in step S2 are used to carry out co-extrusion blown film under the conditions that the co-extrusion head temperature is controlled at 200°C, the blowing ratio is 2.7, and the pulling speed is 30r / min. After cooling and molding, a flame-retardant film material with arc protection and eye protection function is obtained.

[0046] Comparative Example 2: A method for preparing a flame-retardant film material with arc-proof eye-protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll mill for 1 hour to obtain a blended modified base layer mixture and a blended modified flame retardant layer mixture respectively; The raw materials of the blended modified base layer: polyvinyl chloride, polyethylene glycol, plasticizer (dioctyl phthalate), stabilizer (dibutyltin dilaurate), filler (calcium carbonate) have a mass ratio of 42:15:20:3:20; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, polyvinyl alcohol, plasticizer (dibutyl phthalate), flame retardant (aluminum hydroxide), stabilizer (octyl tin maleate), filler (barium sulfate), ultraviolet absorber (nano titanium dioxide) have a mass ratio of 40:20:20:10:3:2:5; S2, extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 180° C. and the temperature of the front section of the barrel controlled at 190° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, the pellets of each layer prepared in step S2 are used to carry out co-extrusion blown film under the conditions that the co-extrusion head temperature is controlled at 200°C, the blowing ratio is 2.7, and the pulling speed is 30r / min. After cooling and molding, a flame-retardant film material with arc protection and eye protection function is obtained.

[0047] Comparative Example 3: A method for preparing a flame-retardant film material with arc-proof eye-protection function, the preparation method comprising: S1. Weigh the following raw materials respectively, and mix them in a three-roll grinder for 1 hour to obtain a blended modified base layer mixture, an arc protection eye protection layer mixture, and a blended modified flame retardant layer mixture; The raw materials of the blended modified base layer: polyvinyl chloride, plasticizer (dioctyl phthalate), stabilizer (dibutyltin dilaurate), filler (calcium carbonate) in a mass ratio of 47:20:3:20; The raw materials of the arc-proof eye protection layer: polyvinyl chloride, ultraviolet absorber (nano titanium dioxide), plasticizer (tricresyl phosphate), stabilizer (octyltin maleate), filler (talc) are in a mass ratio of 60:15:16:4:5; The raw materials of the blended modified flame retardant layer: polyvinyl chloride, plasticizer (dibutyl phthalate), flame retardant (aluminum hydroxide), stabilizer (octyl tin maleate), filler (barium sulfate) have a mass ratio of 65:20:10:3:2; S2, extruding and granulating the mixed materials of each layer prepared in step S1 in three twin-screw extruders, with the temperature of the rear section of the barrel controlled at 180° C. and the temperature of the front section of the barrel controlled at 190° C., to obtain pellets of each layer; S3. Using a multi-layer co-extrusion composite equipment, using each layer of pellets prepared in step S2, co-extrusion blown film is carried out under the conditions of the co-extrusion head temperature being controlled at 200°C, the blowing ratio being 2.7, and the pulling speed being 30r / min. After cooling and molding, a five-layer composite structure flame-retardant film material with arc protection and eye protection function is obtained.

[0048] Referring to GB / T 2410-2008, the light transmittance of flame-retardant film materials with arc protection and eye protection functions was tested using a spectrophotometer.

[0049] The ultraviolet transmittance of flame-retardant film materials with arc-proof eye protection function was tested by ultraviolet spectrophotometer to evaluate the quality of its arc-proof eye protection function.

[0050] With reference to GB / T 2408-2021, the combustion performance of flame-retardant film materials with arc protection and eye protection functions was tested using a vertical combustion experiment to evaluate their flame retardant properties.

[0051] Table 1 Performance test results of flame retardant film materials with arc protection and eye protection functions prepared in Examples 1 to 6 and Comparative Examples 1 to 4

[0052] As can be seen from Table 1, the ultraviolet transmittance of Examples 1 to 6 is lower than that of Comparative Examples 1 to 3. This is because in the flame-retardant film material with arc-proof eye protection function prepared in the present application, the blended modified base layer, arc-proof eye protection layer and blended modified flame-retardant layer are compounded through a unique formulation of each layer component and a multi-layer co-extrusion composite process to form a five-layer composite structure; moreover, in the arc-proof eye protection layer, polyvinyl chloride and polyvinyl pyrrolidone are both polar polymers, and since the two have similar polarities, they have good compatibility. Therefore, the ultraviolet absorber and other additives can be well and evenly dispersed in the arc-proof eye protection layer, so that the arc-proof eye protection layer has a good arc-proof effect. In addition, the pyrrolidone ring in polyvinyl pyrrolidone can absorb ultraviolet rays, so it can be combined with ultraviolet absorbers to further enhance the arc-proof effect. Moreover, the ultraviolet absorber further makes the blended modified flame-retardant layer also have certain arc-proof performance, so that the arc passing through the blended modified flame-retardant layer is reduced in intensity before reaching the arc-proof eye protection layer.

[0053] The light transmittance of Examples 1 to 6 is higher than that of Comparative Examples 1 to 3. This is because the compatibility of polyvinyl chloride after the polyvinyl alcohol blending modification is also greatly enhanced, so that the distribution of each component in the entire blended modified flame retardant layer is more uniform than that of polyvinyl chloride used alone, so that the entire flame retardant film material can still maintain a high light transmittance while preventing arc light.

[0054] The flame retardant properties of Examples 1 to 6 are also better than those of Comparative Examples 1 and 2. This is because, in Examples 1 to 6, the unique five-layer composite structure first ensures that the film material has better flame retardant properties than a single-layer or few-layer film; while Comparative Example 1 lacks a blended modified flame retardant layer, and Comparative Example 2 lacks an arc-proof eye protection layer, resulting in an incomplete five-layer composite structure and failure to achieve the designed effect. The flame retardant properties of Comparative Example 3 are only slightly better than those of Comparative Examples 1 and 2, and are still inferior to Examples 1 to 6. This is because: in Examples 1 to 6, the polyvinyl chloride and polyvinyl alcohol of the blended modified flame retardant layer also have good compatibility due to their similar polarity, so the flame retardant, ultraviolet absorber and other additives can also be well and evenly dispersed in the blended modified flame retardant layer, which improves the flame retardant effect of the blended modified flame retardant layer.

[0055] Finally, due to the presence of a large number of oxygen atoms and nitrogen atoms, the polyvinyl pyrrolidone in the arc protection eye protection layer can form a large number of hydrogen bonds with the oxygen atoms in the polyethylene glycol in the blended modified base layer and the oxygen atoms in the polyvinyl alcohol in the blended modified flame retardant layer, so that the layers of the five-layer composite structure can be more firmly bonded together.

[0056] The above results show and describe the basic principles and main features of the present invention as well as the advantages of the present invention.

[0057] Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the equivalents of the appended claims.

Claims

1. A flame retardant film material with arc protection and eye protection function, characterized in that: The film material includes a five-layer composite structure, which includes a blended modified base layer, two arc-proof eye protection layers bonded to both sides of the surface of the blended modified base layer, and two blended modified flame-retardant layers bonded to the arc-proof eye protection layers away from the surface of the blended modified base layer; the blended modified base layer includes polyvinyl chloride and polyethylene glycol; the arc-proof eye protection layer includes polyvinyl chloride, polyvinyl pyrrolidone and an ultraviolet absorber; the blended modified flame-retardant layer includes polyvinyl chloride, polyvinyl alcohol and an ultraviolet absorber.

2. The flame-retardant film material with arc-proof eye-protection function according to claim 1, characterized in that: The mass ratio of polyvinyl chloride, polyethylene glycol, plasticizer, stabilizer and filler in the blended modified base layer is (30-50): (10-20): (10-25): (1-5): (10-30); the mass ratio of polyvinyl chloride, polyvinyl pyrrolidone, ultraviolet absorber, plasticizer, stabilizer and filler in the arc protection eye protection layer is (40-50): (10-20): (10-20): (15-20): (1-5): (1-5); the mass ratio of polyvinyl chloride, polyvinyl alcohol, plasticizer, flame retardant, stabilizer, filler and ultraviolet absorber in the blended modified flame retardant layer is (30-40): (20-30): (15-35): (5-10): (1-5): (1-5): (5-10).

3. The flame-retardant film material with arc-proof eye-protection function according to claim 2, characterized in that: The plasticizer includes one or more of dioctyl phthalate, dioctyl terephthalate, dibutyl phthalate, dioctyl adipate, tricresyl phosphate, epoxy soybean oil and epoxy linseed oil; the epoxy value of the epoxy soybean oil and the epoxy linseed oil ranges from 3% to 6%.

4. The flame-retardant film material with arc-proof eye-protection function according to claim 2, characterized in that: The stabilizer includes one or more of dibutyltin dilaurate, octyltin maleate and calcium zinc stabilizer; the filler includes one or more of calcium carbonate, barium sulfate, talc and kaolin.

5. The flame-retardant film material with arc-proof eye-protection function according to claim 2, characterized in that: The flame retardant includes one or more of aluminum hydroxide, triphenyl phosphate, tricresyl phosphate and trioctylphosphine oxide.

6. The flame-retardant film material with arc-proof eye-protection function according to claim 2, characterized in that: The ultraviolet absorber includes one or more of nano titanium dioxide and nano zinc oxide; the particle size of the nano titanium dioxide and nano zinc oxide ranges from 20 to 50 nm.

7. The method for preparing a flame-retardant film material with arc-proof eye-protection function according to any one of claims 1 to 6, characterized in that: include: The raw materials of the blended modified base layer, the arc-proof eye protection layer and the blended modified flame-retardant layer are mixed in a three-roll grinder for 1 hour according to the formula to obtain a blended modified base layer mixture, an arc-proof eye protection layer mixture and a blended modified flame-retardant layer mixture respectively; Then, the prepared mixed materials of each layer are extruded and granulated in three twin-screw extruders to obtain the blended modified base layer granules, arc-proof eye protection layer granules and blended modified flame-retardant layer granules respectively under the control of set temperature; Finally, a multi-layer co-extrusion composite device is used to co-extrude the prepared layers of pellets under set parameters to perform film blowing, and after cooling and molding, a flame-retardant film material with arc-proof and eye-protection functions is obtained.

8. The method for preparing a flame-retardant film material with arc-proof eye-protection function according to claim 7, characterized in that: The set temperature control during the extrusion granulation specifically includes: the temperature of the rear section of the barrel of the three twin-screw extruder granulators is controlled at 165~185℃, and the temperature of the front section of the barrel is controlled at 180~200℃.

9. The method for preparing a flame-retardant film material with arc-proof eye-protection function according to claim 7, characterized in that: The setting parameters for the co-extrusion blown film specifically include: the co-extrusion head temperature of the multi-layer co-extrusion composite equipment is controlled at 180-200°C; the blow-up ratio is 2.5-3.0, the screw speed is 25-35r / min, and the traction speed is 15-40m / min.

10. Use of a flame retardant film material with arc light protection and eye protection function according to any one of claims 1 to 6, characterized in that: Used to prepare flame-retardant door curtains with arc-proof and eye-protection functions.

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