A polyethylene composite material for making electronic product packaging bags

Abstract

The present invention relates to the field of material technology and discloses a polyethylene composite material for making electronic product packaging bags. The composite material is prepared by mixing and extruding a linear low-density polyethylene (LLDPE) substrate with auxiliary materials such as a modified carbon nanotube additive. The modified carbon nanotube additive is a carbon nanotube whose surface is modified with a phosphorus-based macromolecular flame retardant. Firstly, the presence of the phosphorus-based macromolecular flame retardant can improve the compatibility between the carbon nanotubes and the LLDPE substrate, thereby achieving antistatic modification of the material. At the same time, the carbon nanotubes can also play their own advantages as an inorganic reinforcing agent to enhance the mechanical strength of the material. Secondly, the arabinose in the structure of the phosphorus-based macromolecular flame retardant can serve as a carbon source, and the phosphorus element can serve as an acid source. When the material burns, a dense carbon layer can be quickly formed, adhered to the surface of the material, and formed into a barrier layer to prevent continued combustion, thereby effectively improving the flame retardant properties of the material.

Description

Technical Field

[0001] The present invention relates to the technical field of materials, and in particular to a polyethylene composite material for making electronic product packaging bags. Background Art

[0002] In the rapidly developing electronics industry, packaging not only fulfills the fundamental responsibilities of protecting products and ensuring transportation safety, but is also increasingly becoming a crucial component of brand presentation and user experience. With advances in materials science, polyethylene composites, due to their excellent physical properties, chemical stability, and processability, have become a mainstream choice for electronics packaging.

[0003] Polyethylene is a polymer material formed by the polymerization of ethylene monomers. Depending on the polymerization method, it can be divided into various types, including low-density polyethylene (LDPE), high-density polyethylene (HDPE), and linear low-density polyethylene (LLDPE). These different types of polyethylene have their own unique characteristics. For example, low-density polyethylene (LDPE) is soft and has good sealing properties, while high-density polyethylene (HDPE) is hard and wear-resistant. LLDPE combines the advantages of the former two, possessing both flexibility and high strength. However, due to the high precision requirements of some electronic products, polyethylene has poor antistatic properties, which may affect the performance of electronic products by absorbing pollutants such as dust. Furthermore, static electricity can easily cause fires. Polyethylene itself has extremely poor flame retardancy, with a limiting oxygen index of approximately 18%. These shortcomings significantly hinder the application of polyethylene in electronic product packaging bags.

[0004] To address these issues, additive modification is currently the main approach, which involves adding conductive agents, flame retardants, and other functional additives to improve the antistatic and flame retardant properties of polyethylene. Conventional conductive agents are generally graphene, carbon black, and other inorganic materials. These conductive agents are incompatible with the polyethylene matrix at the interface, so if added in small amounts, a conductive path cannot be formed. Larger amounts can cause agglomeration and reduce the strength of the polyethylene. Conventional flame retardants include halogen-based flame retardants, phosphorus-based flame retardants, and inorganic flame retardants. Phosphorus-based flame retardants are relatively environmentally friendly and have a stronger flame retardant modification effect, making them more widely used. However, some small-molecule phosphorus-containing flame retardants are prone to volatility and migration in actual applications, making them unable to guarantee the long-term flame retardancy of polyethylene.

[0005] Based on this, the present invention provides a polyethylene composite material that can solve the problems existing in the prior art. Summary of the Invention

[0006] (1) Technical problems solved

[0007] In view of the shortcomings of the prior art, the present invention provides a polyethylene composite material for making electronic product packaging bags.

[0008] (2) Technical solution

[0009] A polyethylene composite material for making electronic product packaging bags, comprising the following raw materials measured in parts by weight:

[0010] 55-63 parts of linear low density polyethylene;

[0011] 5-9 parts of affinity agent;

[0012] 2-5.5 parts of modified carbon nanotube additive;

[0013] 0.5-1.2 parts of antioxidant;

[0014] 1-2 parts lubricant;

[0015] 3-8 parts of talcum powder.

[0016] As a further embodiment of the present invention, the method for preparing the polyethylene composite material comprises the following steps:

[0017] Step 1: Weigh each raw material according to weight and set aside;

[0018] Step 2: Add linear low-density polyethylene, affinity agent, modified carbon nanotube additive, antioxidant, lubricant and talc into a mixer, control the stirring rate to 500-1000r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder for melt extrusion. After the masterbatch is naturally cooled, the polyethylene composite material can be obtained.

[0019] As a further embodiment of the present invention, the affinity agent is maleic anhydride grafted polyethylene or maleic anhydride grafted polypropylene.

[0020] As a further embodiment of the present invention, the preparation method of the modified carbon nanotube additive specifically comprises the following steps:

[0021] Step S1, ultrasonically dispersing multi-walled carbon nanotubes in tetrahydrofuran, then adding a halogenated acyl halide to the formed uniform dispersion, stirring continuously at room temperature for 4-8 hours, separating a solid material, and obtaining functionalized modified carbon nanotubes;

[0022] Step S2: adding the functionalized modified carbon nanotubes to 1,4-dioxane, ultrasonicating for 20-40 minutes, then adding an alkaline hydroxide aqueous solution, stirring at 50-60°C for 1-2 hours, then adding a phosphorus-based macromolecular flame retardant, and raising the temperature to 70-80°C. After continuous stirring for 6-9 hours, cooling and discharging the material to obtain the modified carbon nanotube additive.

[0023] As a further embodiment of the present invention, in step S1, the halogenated acyl halide is any one of chloroacetyl chloride, bromoacetyl bromide or 4-bromobutyryl chloride.

[0024] As a further embodiment of the present invention, in step S2, the alkaline hydroxide is potassium hydroxide or sodium hydroxide.

[0025] As a further embodiment of the present invention, in step S2, the method for preparing the phosphorus-based macromolecular flame retardant specifically comprises the following steps:

[0026] Step SS1: adding 3-[bis(glycidyloxymethyl)methoxy]-1,2-propanediol and a reactive phosphorus-containing flame retardant to toluene, stirring to form a homogeneous solution, then adding triethylamine to the homogeneous solution, introducing nitrogen protection, gradually raising the temperature to 70-80° C., maintaining stirring at this temperature for 3-6 hours, removing the solvent, cooling and discharging the material to obtain a phosphorus-containing bridging agent;

[0027] Step SS2: Add the phosphorus-containing bridging agent and D-arabinose to N,N-dimethylformamide, stir and mix, and continue to add the phase transfer catalyst. After the addition is completed, under nitrogen protection, gradually increase the temperature to 90-100° C. and continue stirring for 8-12 hours to obtain a phosphorus-based macromolecular flame retardant.

[0028] As a further embodiment of the present invention, in step SS1, the molar ratio of the 3-[bis(glycidyloxymethyl)methoxy]-1,2-propanediol to the reactive phosphorus-containing flame retardant is 1:2; the reactive phosphorus-containing flame retardant is dimethyl chlorophosphate, diethyl chlorophosphate or 2-chloro-2-oxo-1,3,2-dioxaphospholane.

[0029] As a further embodiment of the present invention, in step SS2, the molar ratio of the phosphorus-containing bridging agent to D-arabinose is 1:1.

[0030] As a further embodiment of the present invention, in step SS2, the phase transfer catalyst is boron trifluoride diethyl ether complex.

[0031] In the above technical solution, 3-[bis(glycidyloxymethyl)methoxy]-1,2-propylene glycol and a reactive phosphorus-containing flame retardant are first used as reactants. Under the action of triethylamine, the active hydroxyl groups and P-Cl in each other's structures react to obtain a phosphorus-containing bridging agent containing a phosphorus-containing flame retardant structure. Then, under the action of a phase transfer catalyst, the two equivalent epoxy groups in the structure can further undergo ring-opening polymerization with the active hydroxyl substituents in the D-arabinose structure. At the same time, the dosage ratio of the two is controlled to obtain a phosphorus-based macromolecular flame retardant substance containing a large number of phosphorus-containing flame retardant structures and active substituted hydroxyl groups in the structure.

[0032] The surface of multi-walled carbon nanotubes modified with halogenated acyl halides contains active halogen substituents, which can replace the active hydroxyl substituents in the structure of phosphorus-based macromolecular flame retardants under the catalytic action of alkaline oxides, thereby modifying the phosphorus-based macromolecular flame retardants on the surface of carbon nanotubes to prepare modified carbon nanotube additives.

[0033] (3) Beneficial technical effects

[0034] The modified carbon nanotube additive prepared by the present invention is a carbon nanotube whose surface is modified with a phosphorus-based macromolecular flame retardant. First, the structure of the phosphorus-based macromolecular flame retardant contains hydroxyl substituents that do not participate in the reaction, which can interact with the maleic anhydride groups in the affinity agent structure during the subsequent melt extrusion process, thereby greatly improving the compatibility between the carbon nanotubes and the linear low-density polyethylene matrix. This chemical connection method can effectively avoid the agglomeration problem of the carbon nanotubes, allowing them to be relatively evenly dispersed in the linear low-density polyethylene matrix, thereby forming a stable conductive path, improving the conductivity of the material, and achieving antistatic modification of the material. At the same time, the carbon nanotubes can also play their own advantages as inorganic reinforcing agents to enhance the mechanical strength of the material.

[0035] Secondly, the arabinose in the structure of phosphorus-based macromolecular flame retardants can serve as a carbon source, and phosphorus can serve as an acid source. When the material burns, a dense carbon layer can be quickly formed, adhering to the surface of the material to form a barrier layer. While preventing continued combustion, it can also prevent the occurrence of molten dripping. Moreover, due to the existence of this interaction, phosphorus-based macromolecular flame retardants cannot easily volatilize and migrate, thus ensuring the flame retardancy of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is the infrared analysis test chart of phosphorus-based macromolecular flame retardants. DETAILED DESCRIPTION

[0038] To facilitate understanding of the present invention, the present invention will be described in more detail below. Preferred embodiments of the present invention are provided below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0039] Preparation Example 1

[0040] Preparation of modified carbon nanotube additives:

[0041] Step S1, ultrasonically dispersing 1.2 g of multi-walled carbon nanotubes in tetrahydrofuran, then adding 3.5 g of chloroacetyl chloride to the resulting uniform dispersion, stirring continuously at room temperature for 6 h, separating the solid material, and obtaining functionalized modified carbon nanotubes;

[0042] Step S2: add 1.8 g of functionalized modified carbon nanotubes to 1,4-dioxane, ultrasonicate for 30 min, then add 10 mL of 20% sodium hydroxide aqueous solution, stir at 50 ° C for 1 h, then add 4 g of phosphorus-based macromolecular flame retardant, and raise the temperature to 75 ° C. After continuous stirring for 8 h, cool and discharge the material to obtain the modified carbon nanotube additive.

[0043] The preparation method of the phosphorus-based macromolecular flame retardant is as follows:

[0044] Step SS1, 0.2 g of 3-[bis(glycidyloxymethyl)methoxy]-1,2-propanediol and 0.2 g of 2-chloro-2-oxo-1,3,2-dioxaphosphacyclopentane were added to toluene, and stirring was started to form a homogeneous solution. Then, 0.05 g of triethylamine was added to the homogeneous solution, and nitrogen was introduced for protection. The temperature was gradually increased to 75° C. and stirred for 4 hours at this temperature. The solvent was removed, and the temperature was lowered and the material was discharged to obtain a phosphorus-containing bridging agent;

[0045] Step SS2: Add 0.3 g of a phosphorus-containing bridging agent and 0.09 g of D-arabinose to N,N-dimethylformamide, stir and mix, and then add 0.01 g of boron trifluoride ether complex. After the addition is completed, under nitrogen protection, gradually increase the temperature to 95° C. and continue stirring for 9 hours to obtain a phosphorus-based macromolecular flame retardant.

[0046] Figure 1 This is the infrared analysis test chart of the phosphorus-based macromolecular flame retardant, where 3237cm -1 The characteristic absorption peak at 2800 cm is the characteristic absorption peak of the hydroxyl group that did not participate in the reaction. -1 ~3000cm -1 The characteristic absorption peak at 1289cm is the characteristic absorption peak of methylene. -1 The characteristic absorption peak at 1037cm is the P=O characteristic absorption peak. -1 The characteristic absorption peak appearing at is the characteristic absorption peak of the ether bond. Example

[0047] A polyethylene composite material for making electronic product packaging bags, comprising the following raw materials measured in parts by weight:

[0048] 55 parts of linear low-density polyethylene;

[0049] 5 parts of affinity agent;

[0050] 2 parts of modified carbon nanotube additive;

[0051] 0.5 parts of antioxidant;

[0052] 1 part lubricant;

[0053] 3 parts talcum powder.

[0054] The preparation method of the polyethylene composite material comprises the following steps:

[0055] Step 1: Weigh each raw material according to weight and set aside;

[0056] Step 2: Add linear low-density polyethylene, affinity agent, modified carbon nanotube additive, antioxidant, lubricant and talc into a mixer, control the stirring rate to 500r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder, control the temperature of each zone in sequence: zone 1 200℃, zone 2 210℃, zone 3 220℃, zone 4 220℃, zone 5 210℃, zone 6 210℃, control the screw speed to 50rpm, carry out melt extrusion, and wait for the masterbatch to cool naturally to obtain a polyethylene composite material.

[0057] The affinity agent is maleic anhydride grafted polyethylene; the preparation method of the modified carbon nanotube additive is shown in Preparation Example 1; the antioxidant is antioxidant 1010; the lubricant is polyethylene wax, and the rest are the same. Example

[0058] A polyethylene composite material for making electronic product packaging bags, comprising the following raw materials measured in parts by weight:

[0059] 56 parts of linear low-density polyethylene;

[0060] 6 parts of affinity agent;

[0061] 5 parts of modified carbon nanotube additive;

[0062] 1 part antioxidant;

[0063] 1.5 parts of lubricant;

[0064] 4 parts of talcum powder.

[0065] The preparation method of the polyethylene composite material comprises the following steps:

[0066] Step 1: Weigh each raw material according to weight and set aside;

[0067] Step 2: Add linear low-density polyethylene, affinity agent, modified carbon nanotube additive, antioxidant, lubricant and talc into a mixer, control the stirring rate to 800r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder, control the temperature of each zone in sequence: zone 1 200℃, zone 2 210℃, zone 3 220℃, zone 4 220℃, zone 5 210℃, zone 6 210℃, control the screw speed to 50rpm, carry out melt extrusion, and wait for the masterbatch to cool naturally to obtain a polyethylene composite material. Example

[0068] A polyethylene composite material for making electronic product packaging bags, comprising the following raw materials measured in parts by weight:

[0069] 63 parts of linear low-density polyethylene;

[0070] 9 parts of affinity agent;

[0071] 5.5 parts of modified carbon nanotube additive;

[0072] 1.2 parts of antioxidant;

[0073] 2 parts lubricant;

[0074] 8 parts of talcum powder.

[0075] The preparation method of the polyethylene composite material comprises the following steps:

[0076] Step 1: Weigh each raw material according to weight and set aside;

[0077] Step 2: Add linear low-density polyethylene, affinity agent, modified carbon nanotube additive, antioxidant, lubricant and talc into a mixer, control the stirring rate to 1000r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder, control the temperature of each zone in sequence: zone 1 200℃, zone 2 210℃, zone 3 220℃, zone 4 220℃, zone 5 210℃, zone 6 210℃, control the screw speed to 50rpm, carry out melt extrusion, and wait for the masterbatch to cool naturally to obtain a polyethylene composite material.

[0078] Comparative Example 1

[0079] A polyethylene composite material for making electronic product packaging bags, comprising the following raw materials measured in parts by weight:

[0080] 56 parts of linear low-density polyethylene;

[0081] 6 parts of affinity agent;

[0082] 5 parts of carbon nanotubes;

[0083] 1 part antioxidant;

[0084] 1.5 parts of lubricant;

[0085] 4 parts of talcum powder.

[0086] The preparation method of the polyethylene composite material comprises the following steps:

[0087] Step 1: Weigh each raw material according to weight and set aside;

[0088] Step 2: Add linear low-density polyethylene, affinity agent, carbon nanotubes, antioxidant, lubricant and talc into a mixer, control the stirring rate to 800r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder, control the temperature of each zone in sequence: zone 1 200℃, zone 2 210℃, zone 3 220℃, zone 4 220℃, zone 5 210℃, zone 6 210℃, control the screw speed to 50rpm, carry out melt extrusion, and wait for the masterbatch to cool naturally to obtain a polyethylene composite material.

[0089] Comparative Example 2

[0090] A polyethylene composite material for making electronic product packaging bags, comprising the following raw materials measured in parts by weight:

[0091] 56 parts of linear low-density polyethylene;

[0092] 6 parts of affinity agent;

[0093] 5 parts of phosphorus-based macromolecular flame retardant;

[0094] 1 part antioxidant;

[0095] 1.5 parts of lubricant;

[0096] 4 parts of talcum powder.

[0097] The preparation method of the polyethylene composite material comprises the following steps:

[0098] Step 1: Weigh each raw material according to weight and set aside;

[0099] Step 2: Add linear low-density polyethylene, affinity agent, phosphorus-based macromolecular flame retardant, antioxidant, lubricant and talc into a mixer, control the stirring rate to 800r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder, control the temperature of each zone in sequence: zone 1 200°C, zone 2 210°C, zone 3 220°C, zone 4 220°C, zone 5 210°C, zone 6 210°C, the screw speed is controlled at 50rpm, melt extrusion is carried out, and the masterbatch is naturally cooled to obtain a polyethylene composite material.

[0100] Comparative Example 3

[0101] A polyethylene composite material for making electronic product packaging bags, comprising the following raw materials measured in parts by weight:

[0102] 56 parts of linear low density polyethylene;

[0103] 6 parts of affinity agent;

[0104] 1 part antioxidant;

[0105] 1.5 parts of lubricant;

[0106] 4 parts of talcum powder.

[0107] The preparation method of the polyethylene composite material comprises the following steps:

[0108] Step 1: Weigh each raw material according to weight and set aside;

[0109] Step 2: Add linear low-density polyethylene, affinity agent, antioxidant, lubricant and talc into a mixer, control the stirring rate to 800r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder, control the temperature of each zone in sequence: zone 1 200℃, zone 2 210℃, zone 3 220℃, zone 4 220℃, zone 5 210℃, zone 6 210℃, control the screw speed to 50rpm, carry out melt extrusion, and wait for the masterbatch to cool naturally to obtain a polyethylene composite material.

[0110] Test Case

[0111] The composite materials in the examples and comparative examples were made into test samples and subjected to various performance tests. The results are shown in the table below:

[0112] Surface resistivity / Ω Tensile strength / MPa Limiting oxygen index / % Test standards GB / T 1410-2006 GB / T 1040.1-2018 GB / T 2406.1-2008 Example 1 <![CDATA[3.8×10 8 ]]> 69.8 31.1 Example 2 <![CDATA[2.1×10 8 ]]> 70.2 31.4 Example 3 <![CDATA[2.9×10 8 ]]> 70.1 31.2 Comparative Example 1 <![CDATA[5.5×10 9 ]]> 61.5 19.9 Comparative Example 2 <![CDATA[8.7×10 14 ]]> 56.9 30.8 Comparative Example 3 <![CDATA[8.5×10 14 ]]> 55.6 18.6

[0113] The test results show that adding the modified carbon nanotube additive in Preparation Example 1 of the present invention as a modifier can effectively enhance the conductivity of polyethylene, achieve antistatic modification, and significantly improve the mechanical strength and flame retardant properties of polyethylene.

[0114] When unmodified carbon nanotubes are used as modifiers, there may be agglomeration problems, which may prevent the formation of a stable conductive path. At the same time, it is also difficult to effectively exert their own reinforcing advantages, resulting in a decrease in the mechanical properties of the material.

[0115] It can also be seen from the test results that carbon nanotubes and phosphorus-based macromolecular flame retardants have a synergistic effect in improving the flame retardant properties of polyethylene.

[0116] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal description of the claims, or if they include equivalent structural elements that are not substantially different from the literal description of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A polyethylene composite material for making electronic product packaging bags, characterized in that: The following raw materials are included in parts by weight: 55-63 parts of linear low density polyethylene; 5-9 parts of affinity agent; 2-5.5 parts of modified carbon nanotube additive; 0.5-1.2 parts of antioxidant; 1-2 parts lubricant; 3-8 parts of talcum powder; The preparation method of the modified carbon nanotube additive specifically comprises the following steps: Step S1, using halogenated acyl halide to modify the surface of multi-walled carbon nanotubes to obtain functionalized modified carbon nanotubes; Step S2: using alkaline hydroxide as a catalyst to catalyze the phosphorus-based macromolecular flame retardant to further modify the surface of the functionalized modified carbon nanotubes to obtain a modified carbon nanotube additive; The preparation method of the phosphorus-based macromolecular flame retardant specifically comprises the following steps: Step SS1: adding 3-[bis(glycidyloxymethyl)methoxy]-1,2-propanediol and a reactive phosphorus-containing flame retardant to toluene, stirring to form a homogeneous solution, then adding triethylamine to the homogeneous solution, introducing nitrogen protection, gradually raising the temperature to 70-80° C., maintaining stirring at this temperature for 3-6 hours, removing the solvent, cooling and discharging the material to obtain a phosphorus-containing bridging agent; Step SS2: Add the phosphorus-containing bridging agent and D-arabinose to N,N-dimethylformamide, stir and mix, and continue to add the phase transfer catalyst. After the addition is completed, under nitrogen protection, gradually increase the temperature to 90-100° C. and continue stirring for 8-12 hours to obtain a phosphorus-based macromolecular flame retardant. The molar ratio of the 3-[bis(glycidyloxymethyl)methoxy]-1,2-propylene glycol to the reactive phosphorus-containing flame retardant is 1:2; the reactive phosphorus-containing flame retardant is dimethyl chlorophosphate, diethyl chlorophosphate or 2-chloro-2-oxo-1,3,2-dioxaphospholane.

2. The polyethylene composite material for making electronic product packaging bags according to claim 1, characterized in that: The preparation method of the polyethylene composite material comprises the following steps: Step 1: Weigh each raw material according to weight and set aside; Step 2: Add linear low-density polyethylene, affinity agent, modified carbon nanotube additive, antioxidant, lubricant and talc into a mixer, control the stirring rate to 500-1000r / min, mechanically stir and mix, and then feed the formed uniform mixture into a twin-screw extruder for melt extrusion. After the masterbatch is naturally cooled, the polyethylene composite material can be obtained.

3. The polyethylene composite material for making electronic product packaging bags according to claim 1, characterized in that: The affinity agent is maleic anhydride grafted polyethylene or maleic anhydride grafted polypropylene.

4. The polyethylene composite material for making electronic product packaging bags according to claim 1, characterized in that: In step S1, the halogenated acyl halide is any one of chloroacetyl chloride, bromoacetyl bromide or 4-bromobutyryl chloride.

5. The polyethylene composite material for making electronic product packaging bags according to claim 1, characterized in that: In step S2, the alkaline hydroxide is potassium hydroxide or sodium hydroxide.

6. The polyethylene composite material for making electronic product packaging bags according to claim 1, characterized in that: In step SS2, the molar ratio of the phosphorus-containing bridging agent to D-arabinose is 1:

1.

7. The polyethylene composite material for making electronic product packaging bags according to claim 1, characterized in that: In step SS2, the phase transfer catalyst is boron trifluoride diethyl ether complex.

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