CN114805890B - High-elasticity PVC reflective film and preparation method thereof - Google Patents
High-elasticity PVC reflective film and preparation method thereof Download PDFInfo
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
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- G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention relates to a high-elasticity PVC reflective film and a preparation method thereof, wherein the high-elasticity PVC reflective film sequentially comprises a second modified resin layer, a PVC film, a first modified resin layer, modified glass beads and a reflective layer, and the preparation method comprises the following steps: s1, coating and arranging a first modified resin layer on one side of a PVC film to obtain a bead planting layer; baking the bead-planting layer for 30-35min at 100-130 ℃, and paving the modified glass beads on the first modified resin layer by adopting a plant process, wherein part of the modified glass beads are sunk into the bead-planting layer to obtain the PVC bead-planting film; s2, plating a layer of metal aluminum with the purity of 99.99% on one side of the PVC bead-planting film obtained in the step S1, which is not planted with beads, so as to form a reflecting layer; and S3, coating a second modified resin layer on one side of the PET film, attaching the second modified resin layer to the reflecting layer in the step S2, hot-pressing the PET film on a heat sealing machine to form a composite film, and stripping the PET film after the composite film is cooled to obtain the high-elasticity reflecting film. The reflective film prepared by the invention has high strength, good elasticity and difficult tearing.
Description
Technical Field
The invention relates to the field of reflective films, in particular to a high-elasticity PVC reflective film and a preparation method thereof.
Background
The reflective film is a retroreflective material which can be directly applied to the film, is widely applied to various aspects of life, such as road signs, truck body identification, clothes with warning functions and the like, has a warning effect on people by bright colors in the daytime, and can reflect clear and bright light to enhance the identification capability of human eyes under the condition of night or insufficient light, thereby effectively avoiding accidents. In the prior art, glass beads are paved on a high polymer original film through a bead grafting process so that a film layer has a light reflecting effect, however, in the bead grafting process, the glass beads are easy to roll, collide and rub, so that the glass beads are worn and broken. And the glass beads after friction are easy to generate static electricity, so that the phenomena of bead carrying, bead stacking and bead floating occur in the bead planting process, the film layer is repeatedly expanded and contracted under the influence of environmental temperature change, the surface of the reflective film is easy to tear, the mechanical strength is low, and the service life of the reflective film is reduced.
Disclosure of Invention
Therefore, the invention aims to provide the high-elasticity PVC reflective film and the preparation method thereof, and the prepared reflective film has high strength, good elasticity and difficult tearing.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the preparation method of the high-elasticity PVC reflective film comprises the following steps of:
s1, coating and arranging a first modified resin layer on one side of a PVC film to obtain a bead planting layer; baking the bead-planting layer for 30-35min at 100-130 ℃, and paving the modified glass beads on the first modified resin layer by adopting a plant process, wherein part of the modified glass beads are sunk into the bead-planting layer to obtain the PVC bead-planting film;
s2, plating a layer of metal aluminum with the purity of 99.99% on one side of the PVC bead-planting film obtained in the step S1, which is not planted with beads, so as to form a reflecting layer;
and S3, coating a second modified resin layer on one side of the PET film, attaching the second modified resin layer to the reflecting layer in the step S2, hot-pressing the PET film on a heat sealing machine to form a composite film, and stripping the PET film after the composite film is cooled to obtain the high-elasticity reflecting film.
Preferably, the preparation method of the modified glass beads comprises the following steps:
mixing glass beads, ammonia water with the volume fraction of 75%, KH570 coupling agent and ethanol with the volume fraction of 75% according to the weight ratio of 1:3:2:8, magnetically stirring for 12-14h, and drying at 60 ℃ to obtain the modified glass beads.
Preferably, the first modified resin layer is made of a modified epoxy resin solution, and the preparation method of the modified epoxy resin solution comprises the following steps:
s11, mixing epoxy resin, D-sorbitol, KH570 coupling agent and ethanol solution with the volume fraction of 75%, magnetically stirring for 24-36h at the rotating speed of 200r/min under the nitrogen protection vacuumizing environment to obtain epoxy resin solution;
and S12, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the epoxy resin solution in the step S11, and uniformly stirring to obtain a modified epoxy resin solution.
Preferably, the weight part ratio of the epoxy resin to the D-sorbitol to the KH570 coupling agent to the ethanol solution is 1:2:1:10, and the weight part ratio of the carbon nanofibers to the sodium dodecyl sulfate to the graphene oxide to the epoxy resin solution is 1:3:1:10.
Preferably, the second modified resin layer is made of a modified acrylic resin solution, and the preparation method of the modified acrylic resin solution includes the following steps:
s31, stirring polyvinyl alcohol and deionized water at 90-95 ℃ for 12-24 hours, and cooling to room temperature to obtain a polyvinyl alcohol solution;
s32, adding acetic acid solution with the volume fraction of 55% and glutaraldehyde into the polyvinyl alcohol solution in the step S31, stirring for 5-20min, adding acrylic resin, PEG4000 and ethyl acetate, and stirring for 40-50min to obtain an acrylic resin solution;
and S33, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the acrylic resin solution in the step S32 to obtain a modified acrylic resin solution.
Preferably, the weight part ratio of the polyvinyl alcohol, deionized water, acetic acid solution, glutaraldehyde, acrylic resin, PEG4000 and ethyl acetate is 1:20:10:0.2:4:2:6, and the weight part ratio of the carbon nanofibers, sodium dodecyl sulfate, graphene oxide and acrylic resin solution is 1:3:1:10.
Preferably, the thickness ratio of the second modified resin layer, the PVC film and the first modified resin layer is 1:100:1.
Preferably, the thickness of the PVC film is 200-300 μm.
Preferably, the thickness of the reflective layer is 4-8nm.
The invention also provides the high-elasticity PVC reflective film prepared by the preparation method.
According to the invention, the graphene oxide is modified on the surface of the carbon fiber, so that the specific surface area of the fiber can be effectively increased, more contact sites with resin are provided on the surface of the fiber, the interface performance of the carbon fiber composite material is enhanced, meanwhile, the graphene oxide can fill some grooves and micro defects on the surfaces of the carbon fiber and the resin, so that the tensile strength of the resin is increased, and under the action of stress, the stronger interface phase and strength can limit and block the molecular chain segment movement of the resin layer along the interface direction, so that the flexural modulus and the elastic modulus of the reflecting film are increased.
The modified glass bead structure is more compact, the light transmittance is good, the embedding of the modified glass bead and the modified resin layer form a molecular network structure, the bundling property of the modified resin layer and the modified glass bead can be enhanced, the modified resin layer and the modified glass bead are not easy to break and slip under the action of external force, when the reflective film is subjected to external load, stress can be effectively transmitted on an interface, the surface property of the reflective film is improved, the surface energy is reduced, the surface adsorption is reduced, and the mechanical property and the glossiness of the reflective film are improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the raw materials and the equipment according to the present invention are commercially available, and are not specifically exemplified, and the raw materials according to the present invention are commercially available and are well known to those skilled in the art.
Example 1:
the high-elasticity PVC reflective film sequentially comprises a second modified resin layer, a PVC film, a first modified resin layer, modified glass beads and a reflective layer. Wherein the thickness ratio of the second modified resin layer, the PVC film and the first modified resin layer is 1:100:1; the thickness of the PVC film is 300 mu m; the thickness of the reflecting layer is 8nm; the first modified resin layer is a modified epoxy resin layer; the second modified resin layer is a modified acrylic resin layer.
The preparation method of the high-elasticity PVC reflective film comprises the following steps:
s1, coating and arranging a modified epoxy resin solution on one side of a PVC film to obtain a bead planting layer; baking the bead-planting layer for 35min at 130 ℃, and paving the modified glass beads on a first modified resin layer formed by the modified epoxy resin solution by adopting a plant process, wherein the modified glass beads are partially sunk into the bead-planting layer to obtain a PVC bead-planting film;
s2, plating a layer of metal aluminum with the purity of 99.99% on one side of the PVC bead-planting film obtained in the step S1, which is not planted with beads, so as to form a reflecting layer;
and S3, coating the modified acrylic resin solution on one side of the PET film, attaching the modified acrylic resin solution to the reflecting layer in the step S2, hot-pressing the PET film on a heat sealing machine to form a composite film, and stripping the PET film after the composite film is cooled to obtain the high-elasticity reflecting film.
The preparation method of the modified glass beads comprises the following steps:
mixing glass beads, ammonia water with the volume fraction of 75%, KH570 coupling agent and ethanol with the volume fraction of 75% according to the weight ratio of 1:3:2:8, magnetically stirring for 14h, and drying at 60 ℃ to obtain the modified glass beads.
Wherein, the first modified resin layer is made of modified epoxy resin solution, and the preparation method of the modified epoxy resin solution comprises the following steps:
s11, mixing epoxy resin, D-sorbitol, KH570 coupling agent and ethanol solution with the volume fraction of 75%, and magnetically stirring for 36 hours at the rotating speed of 200r/min under the nitrogen protection vacuumizing environment to obtain epoxy resin solution; wherein the weight ratio of the epoxy resin to the D-sorbitol to the KH570 coupling agent to the ethanol solution is 1:2:1:10;
s12, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the epoxy resin solution in the step S11, and uniformly stirring to obtain a modified epoxy resin solution; the weight ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the epoxy resin solution is 1:3:1:10.
Wherein the second modified resin layer is made of modified acrylic resin solution, and the preparation method of the modified acrylic resin solution comprises the following steps:
s31, stirring polyvinyl alcohol and deionized water at 95 ℃ for 24 hours, and cooling to room temperature to obtain a polyvinyl alcohol solution;
s32, adding acetic acid solution with the volume fraction of 55% and glutaraldehyde into the polyvinyl alcohol solution in the step S31, stirring for 20min, adding acrylic resin, PEG4000 and ethyl acetate, and stirring for 50min to obtain an acrylic resin solution; wherein, the weight part ratio of polyvinyl alcohol, deionized water, acetic acid solution, glutaraldehyde, acrylic resin, PEG4000 and ethyl acetate is 1:20:10:0.2:4:2:6;
s33, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the acrylic resin solution in the step S32 to obtain a modified acrylic resin solution; the weight ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the acrylic resin solution is 1:3:1:10.
Example 2:
the high-elasticity PVC reflective film sequentially comprises a second modified resin layer, a PVC film, a first modified resin layer, modified glass beads and a reflective layer. Wherein the thickness ratio of the second modified resin layer, the PVC film and the first modified resin layer is 1:100:1; the thickness of the PVC film is 200 mu m; the thickness of the reflecting layer is 4nm; the first modified resin layer is a modified epoxy resin layer; the second modified resin layer is a modified acrylic resin layer.
The preparation method of the high-elasticity PVC reflective film comprises the following steps:
s1, coating and arranging a modified epoxy resin solution on one side of a PVC film to obtain a bead planting layer; baking the bead-planting layer for 30min at 100 ℃, and paving modified glass beads on a first modified resin layer formed by the modified epoxy resin solution by adopting a plant process, wherein the modified glass beads are partially sunk into the bead-planting layer to obtain a PVC bead-planting film;
s2, plating a layer of metal aluminum with the purity of 99.99% on one side of the PVC bead-planting film obtained in the step S1, which is not planted with beads, so as to form a reflecting layer;
and S3, coating the modified acrylic resin solution on one side of the PET film, attaching the modified acrylic resin solution to the reflecting layer in the step S2, hot-pressing the PET film on a heat sealing machine to form a composite film, and stripping the PET film after the composite film is cooled to obtain the high-elasticity reflecting film.
The preparation method of the modified glass beads comprises the following steps:
mixing glass beads, ammonia water with the volume fraction of 75%, KH570 coupling agent and ethanol with the volume fraction of 75% according to the weight ratio of 1:3:2:8, magnetically stirring for 12h, and drying at 60 ℃ to obtain the modified glass beads.
Wherein, the first modified resin layer is made of modified epoxy resin solution, and the preparation method of the modified epoxy resin solution comprises the following steps:
s11, mixing epoxy resin, D-sorbitol, KH570 coupling agent and ethanol solution with the volume fraction of 75%, and magnetically stirring for 24 hours at the rotating speed of 200r/min under the nitrogen protection vacuumizing environment to obtain epoxy resin solution; wherein the weight ratio of the epoxy resin to the D-sorbitol to the KH570 coupling agent to the ethanol solution is 1:2:1:10.
S12, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the epoxy resin solution in the step S11, and uniformly stirring to obtain a modified epoxy resin solution; the weight ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the epoxy resin solution is 1:3:1:10.
Wherein the second modified resin layer is made of modified acrylic resin solution, and the preparation method of the modified acrylic resin solution comprises the following steps:
s31, stirring polyvinyl alcohol and deionized water at 90 ℃ for 12 hours, and cooling to room temperature to obtain a polyvinyl alcohol solution;
s32, adding acetic acid solution with the volume fraction of 55% and glutaraldehyde into the polyvinyl alcohol solution in the step S31, stirring for 5min, adding acrylic resin, PEG4000 and ethyl acetate, and stirring for 40min to obtain an acrylic resin solution; wherein, the weight part ratio of polyvinyl alcohol, deionized water, acetic acid solution, glutaraldehyde, acrylic resin, PEG4000 and ethyl acetate is 1:20:10:0.2:4:2:6;
s33, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the acrylic resin solution in the step S32 to obtain a modified acrylic resin solution; the weight ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the acrylic resin solution is 1:3:1:10.
Example 3:
the high-elasticity PVC reflective film sequentially comprises a second modified resin layer, a PVC film, a first modified resin layer, modified glass beads and a reflective layer. Wherein the thickness ratio of the second modified resin layer, the PVC film and the first modified resin layer is 1:100:1; the thickness of the PVC film is 250 mu m; the thickness of the reflecting layer is 6nm; the first modified resin layer is a modified epoxy resin layer; the second modified resin layer is a modified acrylic resin layer.
The preparation method of the high-elasticity PVC reflective film comprises the following steps:
s1, coating and arranging a modified epoxy resin solution on one side of a PVC film to obtain a bead planting layer; baking the bead-planting layer at 120 ℃ for 32min, and paving modified glass beads on a first modified resin layer formed by the modified epoxy resin solution by adopting a plant process, wherein the modified glass beads are partially sunk into the bead-planting layer to obtain a PVC bead-planting film;
s2, plating a layer of metal aluminum with the purity of 99.99% on one side of the PVC bead-planting film obtained in the step S1, which is not planted with beads, so as to form a reflecting layer;
and S3, coating the modified acrylic resin solution on one side of the PET film, attaching the modified acrylic resin solution to the reflecting layer in the step S2, hot-pressing the PET film on a heat sealing machine to form a composite film, and stripping the PET film after the composite film is cooled to obtain the high-elasticity reflecting film.
The preparation method of the modified glass beads comprises the following steps:
mixing glass beads, ammonia water with the volume fraction of 75%, KH570 coupling agent and ethanol with the volume fraction of 75% according to the weight ratio of 1:3:2:8, magnetically stirring for 13h, and drying at 60 ℃ to obtain the modified glass beads.
Wherein, the first modified resin layer is made of modified epoxy resin solution, and the preparation method of the modified epoxy resin solution comprises the following steps:
s11, mixing epoxy resin, D-sorbitol, KH570 coupling agent and ethanol solution with the volume fraction of 75%, and magnetically stirring for 30 hours at the rotating speed of 200r/min under the nitrogen protection vacuumizing environment to obtain epoxy resin solution; wherein the weight ratio of the epoxy resin to the D-sorbitol to the KH570 coupling agent to the ethanol solution is 1:2:1:10;
s12, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the epoxy resin solution in the step S11, and uniformly stirring to obtain a modified epoxy resin solution; the weight ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the epoxy resin solution is 1:3:1:10.
Wherein the second modified resin layer is made of modified acrylic resin solution, and the preparation method of the modified acrylic resin solution comprises the following steps:
s31, stirring polyvinyl alcohol and deionized water at 92 ℃ for 18 hours, and cooling to room temperature to obtain a polyvinyl alcohol solution;
s32, adding acetic acid solution with the volume fraction of 55% and glutaraldehyde into the polyvinyl alcohol solution in the step S31, stirring for 10min, adding acrylic resin, PEG4000 and ethyl acetate, and stirring for 45min to obtain an acrylic resin solution; wherein, the weight part ratio of polyvinyl alcohol, deionized water, acetic acid solution, glutaraldehyde, acrylic resin, PEG4000 and ethyl acetate is 1:20:10:0.2:4:2:6;
s33, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the acrylic resin solution in the step S32 to obtain a modified acrylic resin solution; the weight ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the acrylic resin solution is 1:3:1:10.
Comparative example 1:
comparative example 1 is substantially identical to the composition of example 1, except that the resin and glass beads are not modified, specifically:
the PVC reflective film sequentially comprises a second resin layer, a PVC film, a first resin layer, glass beads and a reflective layer. Wherein the thickness ratio of the second resin layer, the PVC film and the first resin layer is 1:100:1; the thickness of the PVC film is 300 mu m; the thickness of the reflecting layer is 8nm; the first resin layer is an epoxy resin layer, and the second resin layer is an acrylic resin layer.
The preparation method of the PVC reflective film comprises the following steps:
s1, coating and arranging an epoxy resin solution on one side of a PVC film to obtain a bead planting layer; baking the bead-planting layer at 130 ℃ for 35min, and paving glass beads on a first resin layer formed by the epoxy resin solution by adopting a plant process, wherein the glass beads are partially sunk into the bead-planting layer to obtain a PVC bead-planting film;
s2, plating a layer of metal aluminum with the purity of 99.99% on one side of the PVC bead-planting film obtained in the step S1, which is not planted with beads, so as to form a reflecting layer;
and S3, coating the acrylic resin solution on one side of the PET film, attaching the acrylic resin solution to the reflecting layer in the step S2, hot-pressing the PET film on a heat sealing machine to form a composite film, and stripping the PET film after the composite film is cooled to obtain the reflecting film.
The reflective films of inventive examples 1 to 3, comparative example 1 and commercially available wenzhou bright bright package limited were subjected to performance testing, and the test results are shown in table 1.
Gloss level: the test was performed using a photoelectric gloss meter.
Tear resistance test: the tear tester was used for testing.
Elongation at break, tensile strength test: and testing by adopting a tensile testing machine. .
TABLE 1 test data for examples 1-3, commercially available retroreflective sheeting, and comparative examples 1-2
| Test item | Example 1 | Example 2 | Example 3 | Comparative example 1 | Commercially available reflective film |
| Gloss level | 116 | 114 | 110 | 73 | 89 |
| Tear strength/N | 224 | 207 | 203 | 122 | 160 |
| Elongation at break% | 264.56 | 214.72 | 238.83 | 85.65 | 142.87 |
| Tensile Strength/MPa | 145 | 131 | 143 | 82 | 113 |
As can be seen from the above table, the retroreflective films obtained in examples 1-3 were higher in gloss, tear strength, elongation at break and tensile strength than those of comparative example 1 and the commercial retroreflective films.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. The preparation method of the high-elasticity PVC reflective film is characterized by comprising a second modified resin layer, a PVC film, a first modified resin layer, modified glass beads and a reflective layer in sequence, and comprises the following steps:
s1, coating and arranging a first modified resin layer on one side of a PVC film to obtain a bead planting layer; baking the bead-planting layer for 30-35min at 100-130 ℃, and paving the modified glass beads on the first modified resin layer by adopting a plant process, wherein part of the modified glass beads are sunk into the bead-planting layer to obtain the PVC bead-planting film;
s2, plating a layer of metal aluminum with the purity of 99.99% on one side of the PVC bead-planting film obtained in the step S1, which is not planted with beads, so as to form a reflecting layer;
s3, coating a second modified resin layer on one side of the PET film, attaching the second modified resin layer to the reflecting layer in the step S2, hot-pressing the PET film on a heat sealing machine to form a composite film, and stripping the PET film after the composite film is cooled to obtain the high-elasticity reflecting film;
the preparation method of the modified glass beads comprises the following steps:
mixing glass beads, ammonia water with the volume fraction of 75%, KH570 coupling agent and ethanol with the volume fraction of 75% according to the weight part ratio of 1:3:2:8, magnetically stirring for 12-14h, and drying at 60 ℃ to obtain modified glass beads;
the first modified resin layer is prepared from a modified epoxy resin solution, and the preparation method of the modified epoxy resin solution comprises the following steps:
s11, mixing epoxy resin, D-sorbitol, KH570 coupling agent and ethanol solution with the volume fraction of 75%, magnetically stirring for 24-36h at the rotating speed of 200r/min under the nitrogen protection vacuumizing environment to obtain epoxy resin solution;
s12, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the epoxy resin solution in the step S11, and uniformly stirring to obtain a modified epoxy resin solution;
the weight part ratio of the epoxy resin to the D-sorbitol to the KH570 coupling agent to the ethanol solution is 1:2:1:10, and the weight part ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the epoxy resin solution is 1:3:1:10;
the second modified resin layer is prepared from a modified acrylic resin solution, and the preparation method of the modified acrylic resin solution comprises the following steps:
s31, stirring polyvinyl alcohol and deionized water at 90-95 ℃ for 12-24 hours, and cooling to room temperature to obtain a polyvinyl alcohol solution;
s32, adding acetic acid solution with the volume fraction of 55% and glutaraldehyde into the polyvinyl alcohol solution in the step S31, stirring for 5-20min, adding acrylic resin, PEG4000 and ethyl acetate, and stirring for 40-50min to obtain an acrylic resin solution;
s33, adding the carbon nanofiber, sodium dodecyl sulfate and graphene oxide into the acrylic resin solution in the step S32 to obtain a modified acrylic resin solution;
the weight part ratio of the polyvinyl alcohol to the deionized water to the acetic acid solution to the glutaraldehyde to the acrylic resin to the PEG4000 to the ethyl acetate is 1:20:10:0.2:4:2:6, and the weight part ratio of the carbon nanofiber to the sodium dodecyl sulfate to the graphene oxide to the acrylic resin solution is 1:3:1:10;
the thickness ratio of the second modified resin layer to the PVC film to the first modified resin layer is 1:100:1;
the thickness of the PVC film is 200-300 mu m;
the thickness of the reflecting layer is 4-8nm.
2. A highly elastic PVC reflective film produced by the production method of claim 1.
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