A transparent material barrier packaging film and preparation process

Abstract

The invention relates to the technical field of transparent packaging materials, and discloses a transparent material barrier packaging film and a preparation process thereof, comprising: synthesizing a polyphenylhydrazide organic nucleating agent; compounding an inorganic barrier nucleating filler modified by a phenylsilane coupling agent with the polyphenylhydrazide organic nucleating agent based on a π-π stacking effect to prepare an organic-inorganic hybrid nucleating agent with a barrier function; adding a polypropylene resin, an organic-inorganic hybrid nucleating agent with a barrier function and a composite auxiliary agent into a high-speed mixer for uniform mixing, extruding and granulating through a twin-screw extruder to prepare a polypropylene masterbatch; using the polypropylene masterbatch as a raw material, adopting an upward blowing method blow molding film-forming process to prepare a transparent material barrier packaging film, wherein the film product not only significantly improves the light transmittance of a polypropylene substrate, but also significantly improves the barrier ability of the polypropylene substrate.

Description

Technical Field

[0001] The invention relates to the technical field of transparent packaging materials, and in particular to a transparent material barrier packaging film and a preparation process thereof. Background Art

[0002] Transparent packaging materials give products a good display effect and are deeply loved by consumers, gradually becoming a popular and effective packaging form. At present, the main polymer raw materials used to make transparent packaging materials are terephthalate (PET), polycarbonate (PC), polystyrene (PS) and polyvinyl chloride (PVC). Although these resin materials have high transparency, they have the disadvantages of high production cost and difficult processing.

[0003] Polypropylene (PP) has excellent comprehensive properties and is widely used in the automotive, construction, electrical appliances, chemical, packaging and other industries. The light transmittance of polypropylene products is poor, and its light transmittance is about 30%, which makes the appearance of the products lack aesthetics. Therefore, it is necessary to study a polypropylene material with high transparency so that the products produced by it not only have the characteristics of non-toxicity, odorlessness, high temperature resistance and corrosion resistance of ordinary PP products, but also have the advantages of high light transmittance, high tensile strength and high oxygen and moisture resistance. When the transparency of polypropylene material reaches or exceeds that of other resins such as PET, PC, PS, PVC, etc., it can be used to replace these resin materials to reduce production costs. Summary of the invention

[0004] The present invention uses an independently developed organic-inorganic hybrid nucleating agent with barrier function as a filler for polypropylene to prepare a transparent barrier packaging film, which not only significantly improves the light transmittance of the polypropylene substrate, but also significantly improves the barrier ability of the polypropylene substrate.

[0005] A process for preparing a transparent barrier packaging film comprises the following steps:

[0006] Step 1: synthesizing a polyphenylhydrazide organic nucleating agent, wherein the polyphenylhydrazide organic nucleating agent includes a dihydrazide nucleating agent and a trihydrazide nucleating agent;

[0007] Step 2: The inorganic barrier nucleating filler and the polyphenylhydrazide organic nucleating agent are compounded by the phenyl contained on the surface of the inorganic barrier nucleating filler modified by the phenyl silane coupling agent and the phenyl of the polyphenylhydrazide organic nucleating agent to obtain an organic-inorganic hybrid nucleating agent with barrier function;

[0008] Step 3: adding polypropylene resin, organic-inorganic hybrid nucleating agent with barrier function and composite additives into a high-speed mixer and mixing them evenly, and extruding and granulating them through a twin-screw extruder to prepare polypropylene masterbatch;

[0009] The amount of the organic-inorganic hybrid nucleating agent with barrier function is 0.01-0.5wt% of the amount of the polypropylene resin;

[0010] Step 4: Using polypropylene masterbatch as raw material, adopting the upward blowing film-forming process to prepare a transparent barrier packaging film.

[0011] Preferably, the preparation method of the dihydrazide type nucleating agent is:

[0012] Under the catalytic action of an alkaline catalyst, a chlorine functional group of 1 molar equivalent of 2,4-dichloro-6-phenyl-1,3,5-triazine and a phenolic hydroxyl functional group of 2.01-2.09 molar equivalents of methyl 4-hydroxybenzoate undergo a nucleophilic substitution reaction to generate a diester monomer;

[0013] A dihydrazide monomer is generated by a substitution reaction between an ester functional group of 1 molar equivalent of a diester monomer and a hydrazine functional group of 2.01-2.09 molar equivalents of hydrazine hydrate;

[0014] The dihydrazide type nucleating agent is generated by a substitution reaction between the hydrazide functional group of 1 molar equivalent of the dihydrazide monomer and the acyl chloride group of 2.01-2.09 molar equivalent of benzoyl chloride.

[0015] Preferably, the preparation method of the trihydrazide type nucleating agent is:

[0016] Under the catalytic action of an alkaline catalyst, a chlorine functional group of 1 molar equivalent of cyanuric chloride and a phenolic hydroxyl functional group of 3.01-3.09 molar equivalents of methyl 4-hydroxybenzoate undergo a nucleophilic substitution reaction to generate a triester monomer;

[0017] A trihydrazide monomer is generated by a substitution reaction between an ester functional group of 1 molar equivalent of a triester monomer and a hydrazine functional group of 3.01-3.09 molar equivalents of hydrazine hydrate;

[0018] The trihydrazide type nucleating agent is generated by a substitution reaction between the hydrazide functional group of 1 molar equivalent of the trihydrazide monomer and the acyl chloride group of 3.01-3.09 molar equivalents of benzoyl chloride.

[0019] Preferably, the alkaline catalyst is one of potassium carbonate, sodium carbonate, sodium hydroxide and potassium hydroxide.

[0020] Preferably, the inorganic barrier nucleating filler is one or a combination of more than one of SiO2 nanoparticles, TiO2 nanoparticles, MgAl-LDH nanosheets, and nano-mica sheets.

[0021] Preferably, the mass ratio of the inorganic barrier nucleating filler modified by the phenylsilane coupling agent and the polyphenylhydrazide organic nucleating agent in the organic-inorganic hybrid nucleating agent with barrier function is 1:(0.1-1);

[0022] The phenylsilane coupling agent is one of phenyltrimethoxysilane, phenyltriethoxysilane, phenyltrichlorosilane and N-phenyl-3-aminopropyltrimethoxysilane.

[0023] Preferably, the amount of the composite auxiliary agent is 0.1-1.0wt% of the amount of the polypropylene resin;

[0024] Preferably, the composite auxiliary agent includes an antioxidant, an antistatic agent, an anti-ultraviolet agent and an opening agent;

[0025] Preferably, the antioxidant is one or a combination of more than one of antioxidant 168, antioxidant 626, and antioxidant 1010;

[0026] Preferably, the antistatic agent is antistatic agent AT;

[0027] Preferably, the anti-ultraviolet agent is one or a combination of anti-ultraviolet agent UV-329, anti-ultraviolet agent UV-326, and anti-ultraviolet agent UV-531;

[0028] Preferably, the opening agent is octadecyl erucamide or stearic acid amide.

[0029] The thickness of the transparent barrier packaging film prepared according to the above process is 50-200 μm.

[0030] Beneficial effects: The present invention first designs and synthesizes two polyphenylhydrazide organic nucleating agents (dihydrazide nucleating agent and trihydrazide nucleating agent), and based on the π-π stacking effect of phenyl, an inorganic barrier nucleating filler modified by a phenylsilane coupling agent is compounded with the polyphenylhydrazide organic nucleating agent to prepare an organic-inorganic hybrid nucleating agent with a barrier function; then, the organic-inorganic hybrid nucleating agent with a barrier function is used to modify the polypropylene resin to prepare a polypropylene masterbatch;

[0031] Using polypropylene masterbatch as raw material, the transparent barrier packaging film is prepared by adopting the upward blowing film-forming process;

[0032] The experimental results show that the light transmittance of the transparent barrier packaging film prepared by the present invention is greater than 80%, which is a high-transparency film product;

[0033] It is also found that the transparent barrier packaging film prepared by the present invention has achieved beneficial technical effects of significantly improving barrier properties and mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the chemical structural formula of a dihydrazide type nucleating agent;

[0035] Figure 2 is the chemical structural formula of a trihydrazide type nucleating agent;

[0036] Figure 3 These are the performance test results of transparent barrier packaging films. DETAILED DESCRIPTION

[0037] Experimental Example 1:

[0038] Preparation of dihydrazide type nucleating agents, such as Figure 1 As shown, the preparation steps are as follows:

[0039] (1) Preparation of diester monomer: Under the catalytic action of potassium carbonate, a chlorine functional group of 1 molar equivalent of 2,4-dichloro-6-phenyl-1,3,5-triazine reacts with a phenolic hydroxyl functional group of 2.04 molar equivalents of 4-hydroxybenzoic acid methyl ester to generate a diester monomer. The preparation steps are as follows: 2.3 g of 2,4-dichloro-6-phenyl-1,3,5-triazine, 1.8 g of potassium carbonate, 3.1 g of 4-hydroxybenzoic acid methyl ester and 100 mL of N,N-dimethylformamide are added to a three-necked flask, and the mixture is heated to 70° C. and stirred for 10 h under nitrogen protection and mechanical stirring. The mixture is cooled to room temperature, the solvent is removed by rotary evaporation, the mixture is washed with deionized water, and vacuum dried to obtain a diester monomer.

[0040] (2) Preparation of dihydrazide monomer: a dihydrazide monomer is generated by a substitution reaction between the ester functional group of 1 molar equivalent of the diester monomer and the hydrazide functional group of 2.03 molar equivalents of hydrazine hydrate. The preparation steps are as follows: 2.3 g of the diester monomer, 0.55 g of hydrazine hydrate and 30 mL of methanol are added to a three-necked flask, stirred at room temperature until all dissolved, then heated to 40° C. and stirred for 5 h, cooled to room temperature, filtered, washed with methanol, and vacuum dried to obtain a dihydrazide monomer;

[0041] (3) Preparation of dihydrazide nucleating agent: a dihydrazide nucleating agent is generated by a substitution reaction between the hydrazide functional group of 1 molar equivalent of dihydrazide monomer and the acyl chloride group of 2.06 molar equivalent of benzoyl chloride. The preparation steps are as follows: 1.5 g of dihydrazide monomer, 2.1 g of triethylamine and 30 mL of toluene are added to a three-necked flask, stirred under an ice bath at 5°C and nitrogen is introduced, then 10 mL of a toluene solution containing 1.0 g of benzoyl chloride is dropwise added to the three-necked flask, the temperature is raised to 70°C, stirred for reaction for 8 h, cooled to room temperature, filtered, and vacuum dried to obtain a dihydrazide nucleating agent;

[0042] The nuclear magnetic resonance hydrogen spectrum of the dihydrazide nucleating agent is characterized as follows: 1H NMR (DMSO-d6, 400MHz) δ: 7.13-7.15 (d, 4H), 7.42-7.55 (m, 9H), 7.84-7.93 (m, 8H), 8.37-8.39 (d, 2H), 9.78-9.80 (d, 2H), 9.87-9.89 (d, 2H).

[0043] Experimental Example 2:

[0044] Prepare trihydrazide nucleating agent, the chemical structure of which is as follows Figure 2 As shown, the preparation steps are as follows:

[0045] (1) Preparation of triester monomer: Under the catalytic action of potassium carbonate, a chlorine functional group of 1 molar equivalent of cyanuric chloride and a phenolic hydroxyl functional group of 3.05 molar equivalents of methyl 4-hydroxybenzoate undergo nucleophilic substitution reaction to generate a triester monomer. The preparation steps are similar to the preparation steps of the diester monomer, and the only difference is that 1.2 g of cyanuric chloride is used to replace 2.3 g of 2,4-dichloro-6-phenyl-1,3,5-triazine.

[0046] (2) Preparation of trihydrazide monomer: A trihydrazide monomer is produced by a substitution reaction between the ester functional group of 1 molar equivalent of triester monomer and the hydrazine functional group of 3.03 molar equivalents of hydrazine hydrate. The preparation steps are similar to the preparation steps of dihydrazide monomer, with the only difference being that 1.8 g of triester monomer is used to replace 2.3 g of diester monomer.

[0047] (3) Preparation of trihydrazide nucleating agent: A trihydrazide nucleating agent is prepared by a substitution reaction between the hydrazide functional group of 1 molar equivalent of trihydrazide monomer and the acyl chloride group of 3.07 molar equivalent of benzoyl chloride. The preparation steps are similar to the preparation steps of dihydrazide nucleating agent, and the only difference is that 1.2 g of trihydrazide monomer is used to replace dihydrazide monomer.

[0048] The nuclear magnetic resonance hydrogen spectrum of the trihydrazide nucleating agent is characterized as follows: 1 H NMR (DMSO-d6, 400MHz) δ: 7.06-7.08 (d, 6H), 7.46-7.55 (m, 9H), 7.86-7.94 (m, 12H), 9.87-9.89 (d, 3H), 9.98-10.00 (d, 3H).

[0049] Experimental Example 3:

[0050] Preparation of SiO2 nanoparticles modified with phenyltrimethoxysilane: 5 g of nano-silica powder, 10 mL of deionized water and 40 mL of ethanol were added to a three-necked flask, stirred and dissolved at room temperature for 30 min, and ultrasonically dispersed for 30 min. Then, 10 mL of ethanol solution containing 0.5 g of phenyltrimethoxysilane was added dropwise to the three-necked flask, and the temperature was raised to 60°C and stirred for reaction for 2 h. The mixture was filtered and vacuum dried to obtain SiO2 nanoparticles modified with phenyltrimethoxysilane.

[0051] The nano silicon dioxide powder is hydrophilic nano SiO2 purchased from Nanjing Baoket New Materials Co., Ltd., and its particle size is 5-20 nm.

[0052] Experimental Example 4:

[0053] Preparation of MgAl-LDH nanosheets modified with phenyltrimethoxysilane: Compared with SiO2 nanoparticles modified with phenyltrimethoxysilane, the only difference is that nano-hydrotalcite powder is used to replace nano-silica powder;

[0054] The nano-hydrotalcite powder is nano-MgAl-LDH purchased from Hunan Xiong Innovation Materials Technology Co., Ltd., and its flake diameter is 1-3 μm and thickness is 8-10 nm. Embodiment 1:

[0055] (1) Preparation of an organic-inorganic hybrid nucleating agent I with a barrier function: The phenyl groups on the surface of SiO2 nanoparticles modified with phenyltrimethoxysilane react with the phenyl groups of dihydrazide nucleating agents and trihydrazide nucleating agents to form a π-π stacking reaction, thereby compounding the SiO2 nanoparticles with the dihydrazide nucleating agents and trihydrazide nucleating agents to obtain an organic-inorganic hybrid nucleating agent I with a barrier function. The preparation steps are as follows: 5 g of SiO2 nanoparticles modified with phenyltrimethoxysilane, 20 mL of deionized water and 80 mL of ethanol are added to a three-necked flask, stirred and dissolved at room temperature for 30 min, and ultrasonically dispersed for 1 h. 20 mL of an ethanol solution containing 2 g of dihydrazide nucleating agents and 2 g of trihydrazide nucleating agents is added dropwise to the three-necked flask, the temperature is raised to 60°C and stirred for 8 h, and the solvent is removed by rotary evaporation to obtain an organic-inorganic hybrid nucleating agent I with a barrier function.

[0056] (2) Preparation of organic-inorganic hybrid nucleating agent II with barrier function: The phenyl groups on the surface of MgAl-LDH nanosheets modified with phenyltrimethoxysilane react with the phenyl groups of dihydrazide nucleating agent and trihydrazide nucleating agent to form a π-π stacking reaction, and the MgAl-LDH nanosheets are compounded with the dihydrazide nucleating agent and trihydrazide nucleating agent to obtain an organic-inorganic hybrid nucleating agent II with barrier function. The preparation steps are similar to the preparation experiment of organic-inorganic hybrid nucleating agent I with barrier function, and the only difference is that MgAl-LDH nanosheets modified with phenyltrimethoxysilane are used to replace SiO2 nanoparticles modified with phenyltrimethoxysilane. Embodiment 2:

[0057] (1) Preparation of polypropylene masterbatch I: 100 g of polypropylene resin, 0.4 g of organic-inorganic hybrid nucleating agent I with barrier function, 0.1 g of antioxidant 1010, 0.1 g of antistatic agent AT, 0.1 g of anti-ultraviolet agent UV-329 and 0.2 g of octadecyl erucamide were added into a high-speed mixer and mixed evenly, extruded into granules by a twin-screw extruder, and vacuum dried at 80°C for 6 h to prepare polypropylene masterbatch I;

[0058] The process parameters of the twin-screw extruder were set as follows: the temperatures of zones 1-6 were 160°C, 170°C, 175°C, 180°C, 180°C, and 190°C, respectively, and the rotation speed was 400 r / min;

[0059] (2) Preparation of polypropylene masterbatch II: Compared with polypropylene masterbatch I, the only difference is that an organic-inorganic hybrid nucleating agent II with a barrier function is used to replace an organic-inorganic hybrid nucleating agent I with a barrier function;

[0060] Among them, polypropylene resin was purchased from Shanghai Qiaowei Chemical Technology Co., Ltd. with the brand name HJ4012; antioxidant 1010 was purchased from Shanghai Lingrui Chemical Co., Ltd. with a purity of 98.0%; antistatic agent AT was purchased from Shanghai Kain Chemical Co., Ltd. with the model number CHEMISTAT 3500; anti-ultraviolet agent UV-329 was purchased from Shanghai Lingrui Chemical Co., Ltd. with a purity of 99.0%; octadecyl erucamide was purchased from Jiangxi Zhilian New Materials Co., Ltd. with a purity of 99.0%. Embodiment three:

[0061] (1) Preparation of transparent barrier packaging film I: adding polypropylene masterbatch I into a single-screw extruder film blowing machine, and using an upward blowing method to blow film to obtain a transparent barrier packaging film I with a thickness of 100 μm;

[0062] The process parameters of the single screw extruder film blowing machine are as follows: the temperatures of zones 1-3 are 150°C, 170°C, and 195°C, the rotation speed is 50r / min, the traction speed is 6m / min, the die diameter of the film blowing machine is 65mm, and the blow-up ratio is 2.8;

[0063] (2) Preparation of transparent barrier packaging film II: Compared with transparent barrier packaging film I, the only difference is that polypropylene masterbatch II is used to replace polypropylene masterbatch I.

[0064] Comparative Example:

[0065] Preparation of conventional packaging film: Compared with transparent barrier packaging film Ⅰ, the only difference is that conventional polypropylene masterbatch is used to replace polypropylene masterbatch Ⅰ;

[0066] The difference between the preparation method of conventional polypropylene masterbatch and polypropylene masterbatch I is that organic-inorganic hybrid nucleating agent I with barrier function is not used.

[0067] Performance Testing

[0068] (1) Transparency test: Lambda 950 UV-Vis spectrophotometer was used to test the transmittance of the sample in accordance with GB / T 2410-2008. The test wavelength range was 250-800nm, and the transmittance of the sample at 380nm was recorded.

[0069] (2) Barrier performance test: Use the Y110 oxygen permeability tester to test the oxygen barrier performance of the sample in accordance with GB / T 1038-2022, and record the oxygen permeability of the sample; use the TC-03 water vapor permeability tester to test the water barrier performance of the sample in accordance with GB / T1037-2021, and record the water vapor permeability of the sample;

[0070] (3) Mechanical properties test: The tensile properties of the samples were tested using an Instron 5565 universal tensile testing machine in accordance with GB / T 1040.3-2006 (sampling was performed along the film blowing direction), and the longitudinal tensile strength of the samples was recorded; the sample size was 150 mm × 20 mm (length × width), and the test speed was 5 mm / min;

[0071] The above performance test structure is shown in Table 1 and Figure 3 .

[0072] Table 1 Performance test results of transparent barrier packaging films

[0073]

[0074] By comprehensively analyzing the above experimental results, the following conclusions can be drawn:

[0075] (1) Compared with conventional packaging films, the two transparent barrier packaging films prepared by the present invention using the independently developed organic-inorganic hybrid nucleating agent with barrier function can significantly improve the light transmittance and are high-transparency film products;

[0076] Among them, the light transmittance of the transparent material barrier packaging film I prepared by using the organic-inorganic hybrid nucleating agent I with barrier function is higher;

[0077] (2) The transparent barrier packaging film prepared by the present invention has achieved beneficial technical effects of significantly improving barrier properties and mechanical properties;

[0078] Among them, the improvement effect of the transparent material barrier packaging film II prepared by using the organic-inorganic hybrid nucleating agent II with barrier function is the most significant.

Claims

1. A process for preparing a transparent barrier packaging film, characterized in that: The following steps are involved: Step 1: synthesizing a polyphenylhydrazide organic nucleating agent, wherein the polyphenylhydrazide organic nucleating agent includes a dihydrazide nucleating agent and a trihydrazide nucleating agent; Step 2: The inorganic barrier nucleating filler and the polyphenylhydrazide organic nucleating agent are compounded by the phenyl contained on the surface of the inorganic barrier nucleating filler modified by the phenyl silane coupling agent and the phenyl of the polyphenylhydrazide organic nucleating agent to obtain an organic-inorganic hybrid nucleating agent with barrier function; Step 3: adding polypropylene resin, organic-inorganic hybrid nucleating agent with barrier function and composite additives into a high-speed mixer and mixing them evenly, and extruding and granulating them through a twin-screw extruder to prepare polypropylene masterbatch; The amount of the organic-inorganic hybrid nucleating agent with barrier function is 0.01-0.5wt% of the amount of the polypropylene resin; Step 4: using polypropylene masterbatch as raw material, adopting upward blowing film forming process to prepare a transparent material barrier packaging film; The chemical structural formula of the dihydrazide type nucleating agent is: ； The chemical structural formula of the trihydrazide nucleating agent is: ； The mass ratio of the inorganic barrier nucleating filler modified by the phenylsilane coupling agent and the polyphenylhydrazide organic nucleating agent in the organic-inorganic hybrid nucleating agent with barrier function is 1:(0.1-1).

2. The process for preparing a transparent barrier packaging film according to claim 1, characterized in that: The preparation method of the dihydrazide type nucleating agent is: Under the catalytic action of an alkaline catalyst, a chlorine functional group of 1 molar equivalent of 2,4-dichloro-6-phenyl-1,3,5-triazine and a phenolic hydroxyl functional group of 2.01-2.09 molar equivalents of methyl 4-hydroxybenzoate undergo a nucleophilic substitution reaction to generate a diester monomer; A dihydrazide monomer is generated by a substitution reaction between an ester functional group of 1 molar equivalent of a diester monomer and a hydrazine functional group of 2.01-2.09 molar equivalents of hydrazine hydrate; The dihydrazide type nucleating agent is generated by a substitution reaction between the hydrazide functional group of 1 molar equivalent of the dihydrazide monomer and the acyl chloride group of 2.01-2.09 molar equivalent of benzoyl chloride.

3. The process for preparing a transparent barrier packaging film according to claim 1, characterized in that: The preparation method of the trihydrazide type nucleating agent is: Under the catalytic action of an alkaline catalyst, a chlorine functional group of 1 molar equivalent of cyanuric chloride and a phenolic hydroxyl functional group of 3.01-3.09 molar equivalents of methyl 4-hydroxybenzoate undergo a nucleophilic substitution reaction to generate a triester monomer; A trihydrazide monomer is generated by a substitution reaction between an ester functional group of 1 molar equivalent of a triester monomer and a hydrazine functional group of 3.01-3.09 molar equivalents of hydrazine hydrate; The trihydrazide type nucleating agent is generated by a substitution reaction between the hydrazide functional group of 1 molar equivalent of the trihydrazide monomer and the acyl chloride group of 3.01-3.09 molar equivalents of benzoyl chloride.

4. The process for preparing a transparent barrier packaging film according to claim 2 or 3, characterized in that: The alkaline catalyst is one of potassium carbonate, sodium carbonate, sodium hydroxide and potassium hydroxide.

5. The process for preparing a transparent barrier packaging film according to claim 1, characterized in that: The inorganic barrier nucleating filler is one of SiO2 nanoparticles, TiO2 nanoparticles, MgAl-LDH nanosheets, and nano-mica sheets.

6. The process for preparing a transparent barrier packaging film according to claim 1, characterized in that: The phenylsilane coupling agent is one of phenyltrimethoxysilane, phenyltriethoxysilane, phenyltrichlorosilane and N-phenyl-3-aminopropyltrimethoxysilane.

7. The process for preparing a transparent barrier packaging film according to claim 1, characterized in that: The composite auxiliary agent includes an antioxidant, an antistatic agent, an anti-ultraviolet agent and an anti-blocking agent; The antioxidant is a combination of one or more of antioxidant 168, antioxidant 626, and antioxidant 1010; The antistatic agent is antistatic agent AT; The anti-ultraviolet agent is a combination of one or more of the anti-ultraviolet agent UV-329, the anti-ultraviolet agent UV-326, and the anti-ultraviolet agent UV-531; The opening agent is octadecyl erucamide or stearic acid amide.

8. A transparent barrier packaging film prepared by the process according to any one of claims 1 to 3, characterized in that: The thickness of the transparent barrier packaging film is 50-200 μm.

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