CN114292430A - Preparation method of hydrophobic flame-retardant reflective film - Google Patents
Preparation method of hydrophobic flame-retardant reflective film Download PDFInfo
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- CN114292430A CN114292430A CN202111481545.5A CN202111481545A CN114292430A CN 114292430 A CN114292430 A CN 114292430A CN 202111481545 A CN202111481545 A CN 202111481545A CN 114292430 A CN114292430 A CN 114292430A
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 23
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 45
- 238000002156 mixing Methods 0.000 claims abstract description 27
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims abstract description 20
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 19
- 239000011737 fluorine Substances 0.000 claims abstract description 19
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 17
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 17
- 239000004088 foaming agent Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 230000004048 modification Effects 0.000 claims abstract description 11
- 238000012986 modification Methods 0.000 claims abstract description 11
- 238000007334 copolymerization reaction Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- NHEKBXPLFJSSBZ-UHFFFAOYSA-N 2,2,3,3,4,4,5,5-octafluorohexane-1,6-diol Chemical compound OCC(F)(F)C(F)(F)C(F)(F)C(F)(F)CO NHEKBXPLFJSSBZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002216 antistatic agent Substances 0.000 claims abstract description 9
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012964 benzotriazole Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 239000000178 monomer Substances 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 238000010345 tape casting Methods 0.000 claims abstract description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006096 absorbing agent Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 description 44
- 239000005020 polyethylene terephthalate Substances 0.000 description 44
- 239000000047 product Substances 0.000 description 8
- 239000004604 Blowing Agent Substances 0.000 description 6
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- FRCHKSNAZZFGCA-UHFFFAOYSA-N 1,1-dichloro-1-fluoroethane Chemical compound CC(F)(Cl)Cl FRCHKSNAZZFGCA-UHFFFAOYSA-N 0.000 description 2
- LUQZKEZPFQRRRK-UHFFFAOYSA-N 2-methyl-2-nitrosopropane Chemical compound CC(C)(C)N=O LUQZKEZPFQRRRK-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A preparation method of a hydrophobic flame-retardant reflecting film comprises the following steps: s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly; s2: blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain a master batch; s3: drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet; s4: respectively carrying out longitudinal stretching and transverse stretching on the casting sheet prepared in the step S3 by a longitudinal stretcher and a stretching machine in a heating state to obtain a base material; s5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and fluorine-containing PET is prepared through copolymerization modification; s6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole ultraviolet absorbers and antistatic agents; s7: and melt-coating the product prepared in the S6 on the surface of the substrate. The reflective film prepared by the invention has good hydrophobic property and flame retardant property.
Description
Technical Field
The invention relates to a preparation method of a reflecting film.
Background
The Liquid Crystal Display (LCD) technology is a major technical breakthrough in the 21 st century, and since the LCD is released from the market, the LCD rapidly occupies the display market by virtue of a series of technical characteristics of low power consumption, light weight, high brightness, good picture quality and the like. An LCD, as a passive display device, does not emit light, and images and characters to be displayed are the result of modulating light emitted from a backlight source, and indexes such as chromaticity, brightness, power consumption, and the like of the display mainly depend on the performance of the backlight source. The liquid crystal backlight module mainly comprises a light source, a reflecting film, a diffusion film, a brightness enhancement film, a light guide plate and other components. The reflecting film is an important component of the LCD backlight source module and is used for reflecting light emitted by the light source to the light-emitting direction of the backlight source to the maximum extent, so that the backlight brightness is improved. The types of membrane materials are mainly as follows: polyethylene terephthalate (PET), polypropylene (PP), Polycarbonate (PC), and the like. Compared with PP and PC films, the PET polyester film has the characteristics of high light transmittance, low haze, high brightness, strong adhesive force, good stiffness, good flatness, difficult damage and the like, so that the PET polyester film has a good development space in the application of reflecting films, and is widely concerned in recent years.
However, PET only has C, H, O element components, lacks flame retardant elements such as P, N, Si, S and the like, has a Limit Oxygen Index (LOI) of only 22 percent, belongs to a flammable material, and a foamed product of the PET is easier to burn, so that the application of the PET in industry is limited to a certain extent. And the PET structure contains a small amount of hydroxyl groups, so that the hydrophobic property is weak, and when the air humidity is high, moisture permeates into the film, so that the phenomenon of aging and warping of the PET optical reflecting film is easily caused.
Disclosure of Invention
In order to overcome the defects of poor hydrophobic property and flame retardant property of the reflecting film in the prior art, the invention provides a preparation method of the hydrophobic flame retardant reflecting film, and the prepared reflecting film has good hydrophobic property and flame retardant property.
The technical scheme for solving the technical problem is as follows: a preparation method of a hydrophobic flame-retardant reflecting film comprises the following steps:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly;
s2: blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain a master batch;
s3: drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet;
s4: respectively carrying out longitudinal stretching and transverse stretching on the casting sheet prepared in the step S3 by a longitudinal stretcher and a stretching machine in a heating state to obtain a base material;
s5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and fluorine-containing PET is prepared through copolymerization modification;
s6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole ultraviolet absorbers and antistatic agents;
s7: and melt-coating the product prepared in the S6 on the surface of the substrate.
Preferably, the ratio of each component in step S1 is:
PET: 100 parts by mass
Zinc diethylphosphinate: 5 to 10 parts by mass of
Nano Al2O3: 1 to 2 parts by mass
Organic foaming agent: 8 to 10 parts by mass of
Nano TiO 22: 10 parts by mass.
The invention has the beneficial effects that: the high phosphorus content fire retardant zinc diethylphosphinate has a fire retardant effect in both a condensed phase and a gas phase, and has little influence on the tensile strength of polyester. The metal compound nano particles can promote PET to form a stable carbon layer in the combustion process, so that the flame retardant efficiency of phosphate is improved, and meanwhile, due to the synergistic effect of the nano particles, the addition amount of a flame retardant can be reduced, the reduction of the strength of a PET melt is slowed down, and the foamability of the PET melt is improved.
The phosphate flame retardant zinc diethylphosphinate with high phosphorus content is added by a blending method to carry out flame retardant modification on PET, the cost is low, continuous production can be realized, and the zinc diethylphosphinate and Al can be produced continuously2O3The nucleating agent plays a role in a system, and homogeneous nucleation and heterogeneous nucleation coexist in the foaming and nucleating process of the system, so that the nucleating amount is increased, and the cell size is reduced. The fluorine-containing group is grafted on the PET molecular chain by adopting a copolymerization modification mode, so that the hydrophobic property of PET can be effectively improved, and the reflectivity and other properties of the PET are not influenced.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
In a first embodiment, a method for preparing a hydrophobic flame-retardant reflective film comprises the following steps:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly.
Wherein the proportion of each component is as follows:
PET: 100 parts by mass
Zinc diethylphosphinate: 10 parts by mass
Nano Al2O3: 1.5 parts by mass
Organic blowing agent monofluorodichloroethane: 8 parts by mass
Nano TiO 22: 10 parts by mass.
S2: and (5) blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain the master batch.
S3: and drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet.
S4: and (4) respectively carrying out longitudinal stretching and transverse stretching on the cast sheet prepared in the step S3 by a longitudinal stretcher and a widening machine in a heating state to obtain a base material.
S5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and the fluorine-containing PET is prepared by copolymerization modification.
S6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole UV absorbers and antistatic agents SN.
S7: and melt-coating the product prepared in the S6 on the surface of the substrate.
Example two, a method for preparing a hydrophobic flame retardant reflective film, comprising the steps of:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly.
Wherein the proportion of each component is as follows:
PET: 100 parts by mass
Zinc diethylphosphinate: 5 parts by mass
Nano Al2O3: 1.3 parts by mass
Organic blowing agent 2-methyl-2-nitrosopropane: 8.5 parts by mass
Nano TiO 22: 10 parts by mass.
S2: and (5) blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain the master batch.
S3: and drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet.
S4: and (4) respectively carrying out longitudinal stretching and transverse stretching on the cast sheet prepared in the step S3 by a longitudinal stretcher and a widening machine in a heating state to obtain a base material.
S5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and the fluorine-containing PET is prepared by copolymerization modification.
S6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole UV absorber and antistatic agent BYK.
S7: and melt-coating the product prepared in the S6 on the surface of the substrate.
In a third embodiment, a method for preparing a hydrophobic flame-retardant reflective film includes the following steps:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly.
Wherein the proportion of each component is as follows:
PET: 100 parts by mass
Zinc diethylphosphinate: 9 parts by mass
Nano Al2O3: 1 part by mass
Organic blowing agent azobisisobutyronitrile: 9.8 parts by mass
Nano TiO 22: 10 parts by mass.
S2: and (5) blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain the master batch.
S3: and drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet.
S4: and (4) respectively carrying out longitudinal stretching and transverse stretching on the cast sheet prepared in the step S3 by a longitudinal stretcher and a widening machine in a heating state to obtain a base material.
S5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and the fluorine-containing PET is prepared by copolymerization modification.
S6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole ultraviolet absorber and antistatic agent HBS-302.
S7: and melt-coating the product prepared in the S6 on the surface of the substrate.
Example four, a method for preparing a hydrophobic flame retardant reflective film, comprising the steps of:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly.
Wherein the proportion of each component is as follows:
PET: 100 parts by mass
Zinc diethylphosphinate: 8 parts by mass
Nano Al2O3: 1.2 parts by mass
Organic blowing agent monofluorodichloroethane: 10 parts by mass
Nano TiO 22: 10 parts by mass.
S2: and (5) blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain the master batch.
S3: and drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet.
S4: and (4) respectively carrying out longitudinal stretching and transverse stretching on the cast sheet prepared in the step S3 by a longitudinal stretcher and a widening machine in a heating state to obtain a base material.
S5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and the fluorine-containing PET is prepared by copolymerization modification.
S6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole UV absorbers and antistatic agents SN.
S7: and melt-coating the product prepared in the S6 on the surface of the substrate.
Example five, a method of preparing a hydrophobic flame retardant reflective film, comprising the steps of:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly.
Wherein the proportion of each component is as follows:
PET: 100 parts by mass
Zinc diethylphosphinate: 6 parts by mass
Nano Al2O3: 2 parts by mass
Organic blowing agent 2-methyl-2-nitrosopropane: 9 parts by mass
Nano TiO 22: 10 parts by mass.
S2: and (5) blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain the master batch.
S3: and drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet.
S4: and (4) respectively carrying out longitudinal stretching and transverse stretching on the cast sheet prepared in the step S3 by a longitudinal stretcher and a widening machine in a heating state to obtain a base material.
S5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and the fluorine-containing PET is prepared by copolymerization modification.
S6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole UV absorber and antistatic agent BYK.
S7: and melt-coating the product prepared in the S6 on the surface of the substrate.
Embodiment six, a method for preparing a hydrophobic flame retardant reflective film, comprising the steps of:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly.
Wherein the proportion of each component is as follows:
PET: 100 parts by mass
Zinc diethylphosphinate: 7 parts by mass
Nano Al2O3: 1.8 parts by mass
Organic blowing agent azobisisobutyronitrile: 9.5 parts by mass
Nano TiO 22: 10 parts by mass.
S2: and (5) blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain the master batch.
S3: and drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet.
S4: and (4) respectively carrying out longitudinal stretching and transverse stretching on the cast sheet prepared in the step S3 by a longitudinal stretcher and a widening machine in a heating state to obtain a base material.
S5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and the fluorine-containing PET is prepared by copolymerization modification.
S6: PET prepared by S5 was mixed into ZDP, nano Al2O3, silica particles, benzotriazole UV absorber and antistatic agent HBS-302.
S7: and melt-coating the product prepared in the S6 on the surface of the substrate.
Claims (2)
1. A preparation method of a hydrophobic flame-retardant reflecting film is characterized by comprising the following steps:
s1: PET is used as a master batch, and zinc diethylphosphinate and nano Al are mixed into the master batch2O3Organic foaming agent and nano TiO2And mixing uniformly;
s2: blending and granulating the mixture obtained in the step S1 by a double-screw extruder to obtain a master batch;
s3: drying the master batch prepared in the step S2, pouring the dried master batch into a single-screw extruder for melting and plasticizing, and then carrying out tape casting on the cast sheet;
s4: respectively carrying out longitudinal stretching and transverse stretching on the casting sheet prepared in the step S3 by a longitudinal stretcher and a stretching machine in a heating state to obtain a base material;
s5: 2,2,3,3,4,4,5, 5-octafluoro-1, 6-hexanediol is used as an organic fluorine modified monomer, and fluorine-containing PET is prepared through copolymerization modification;
s6: mixing PET prepared from S5 with ZDP and nano Al2O3Silica particles, benzotriazole ultraviolet absorbers and antistatic agents;
s7: and melt-coating the product prepared in the S6 on the surface of the substrate.
2. The method for preparing the hydrophobic flame-retardant reflective film according to claim 1, wherein: the mixture ratio of each component in the step S1 is as follows:
PET: 100 parts by mass
Zinc diethylphosphinate: 5 to 10 parts by mass of
Nano Al2O3: 1 to 2 parts by mass
Organic foaming agent: 8 to 10 parts by mass of
Nano TiO 22: 10 parts by mass.
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