An antistatic shielding packaging bag and a method for manufacturing the same

Abstract

The application relates to the technical field of packaging materials, and particularly discloses an anti-static shielding packaging bag and a preparation method thereof. The anti-static shielding packaging bag comprises a packaging bag body, an aluminum foil layer is fixed on the outer part of the packaging bag body through an adhesive, and a protective layer is arranged on the outer side wall of the aluminum foil layer away from the packaging bag body; the protective layer is made of raw materials in the following proportions: 40-50 parts of acrylic resin emulsion, 10-20 parts of an antistatic agent, 3-5 parts of a film-forming aid, 4-8 parts of a filler, 35-45 parts of a solvent, 3-6 parts of modified Al2O3-ZrO2 eutectic ceramic fiber, and the modified Al2O3-ZrO2 eutectic ceramic fiber is prepared through the following steps: taking Al2O3-ZrO2 eutectic ceramic fiber raw materials, immersing the raw materials in a water glass solution, taking out and drying, then immersing the raw materials in an aluminum salt solution containing silicon powder, adjusting the pH to 1.5-2.5, keeping at 50-60 DEG C for 100-150 min, and finally taking out and washing and drying to obtain the modified Al2O3-ZrO2 eutectic ceramic fiber. The anti-static shielding packaging bag can maintain excellent and stable anti-static shielding performance after being frequently bent.

Description

Technical Field

[0001] This application relates to the field of packaging materials technology, and more specifically, it relates to an antistatic shielding packaging bag and a method for preparing the same. Background Technology

[0002] Antistatic shielding packaging bags have the characteristics of not generating static electricity themselves and being able to shield external static electricity. They are often used to package sensitive components that are sensitive to static electricity and easily damaged by static electricity, in order to prevent damage caused by static electricity generation in electronic components. They are widely used in the packaging of various PCB boards, computer motherboards, sound cards, graphics cards, network cards, memory modules, CPUs and other static-sensitive high-tech electronic components.

[0003] Antistatic shielding packaging bags are typically made of multiple layers of materials through composite coating. The inner layer is a heat-sealing layer, usually made of CPP material; the middle layer is a high-strength mechanical layer with excellent mechanical properties; and the outer layer is an electrostatic shielding layer, primarily serving an antistatic shielding function. Aluminum foil is commonly used as an electrostatic shielding layer material because of its good insulation and strong protective properties, as well as its impermeability to gases and moisture. However, aluminum foil is relatively brittle and easily breaks when bent. Therefore, a protective layer structure is often set on the outside of the aluminum foil. Furthermore, to further improve the antistatic shielding performance of the packaging bag, an antistatic agent is introduced into the protective layer, resulting in a protective layer with electrostatic shielding properties.

[0004] Regarding the aforementioned technologies, the inventors believe that antistatic shielding packaging bags are frequently subjected to bending and collisions during packaging and transportation. When the antistatic shielding packaging bag is bent, the aluminum foil tends to break, generating significant internal stress that acts on the protective layer. Under the frequent action of internal and external stresses, the protective layer is prone to structural damage. After the protective layer is damaged and deformed, the aluminum foil eventually breaks, resulting in a significant loss of the antistatic shielding performance of the antistatic shielding packaging bag.

[0005] Therefore, there is an urgent need to propose a solution to address the aforementioned technical problems. Summary of the Invention

[0006] To improve the stability of the antistatic shielding performance of packaging bags when subjected to frequent bending, this application provides an antistatic shielding packaging bag and its preparation method.

[0007] In a first aspect, this application provides an antistatic shielding packaging bag, which adopts the following technical solution:

[0008] An antistatic shielding packaging bag includes a bag body, an aluminum foil layer fixed to the outside of the bag body by an adhesive, and a protective layer disposed on the outer side wall of the aluminum foil layer away from the bag body. The protective layer is made of raw materials comprising the following parts by weight:

[0009] 40-50 parts of acrylic resin emulsion;

[0010] 10-20 parts of antistatic agent;

[0011] 3-5 parts of film-forming aid;

[0012] 4-8 parts of filler;

[0013] Solvent 35-45 parts;

[0014] 3-6 parts of modified Al2O3-ZrO2 eutectic ceramic fiber;

[0015] The modified Al2O3-ZrO2 eutectic ceramic fiber was prepared by the following steps:

[0016] Take Al2O3-ZrO2 eutectic ceramic fiber raw material, immerse it in water glass solution, take it out and dry it, then immerse it in aluminum salt solution containing silicon powder, adjust the pH to 1.5-2.5, and keep it at 50-60℃ for 100-150 min. Finally, take it out, wash and dry it to obtain modified Al2O3-ZrO2 eutectic ceramic fiber.

[0017] By adopting the above technical solution, Al2O3-ZrO2 eutectic ceramic fibers exhibit high fracture toughness and can effectively cope with stress concentration. Modification treatment of Al2O3-ZrO2 eutectic ceramic fibers forms aluminum-modified silica gel particles that cover the fiber surface and its pores. On the one hand, this allows for a tighter bond between the modified Al2O3-ZrO2 eutectic ceramic fibers and the resin matrix, effectively suppressing damage to the protective layer structure caused by bending. On the other hand, the modified Al2O3-ZrO2 eutectic ceramic fibers can also form a tight bond with the aluminum foil layer through the aluminum-modified silica gel particles. This not only helps protect the aluminum foil from breakage but also acts as a bridge for stress transmission, keeping the overall structural changes of the aluminum foil layer and the protective layer synchronized and relatively intact. This significantly improves the stability of the antistatic shielding performance of the packaging bag under frequent bending. Meanwhile, the introduction of silica powder, which is distributed in the aluminum-modified silica particles, can bring excellent reinforcement and toughening effects, thereby enabling the modified Al2O3-ZrO2 eutectic ceramic fiber to play a better role in application, both protecting the aluminum foil layer and strengthening the protective layer, resulting in an antistatic shielding packaging bag with excellent bending resistance.

[0018] Preferably, the concentration of the water glass solution is 20-28 wt%, the concentration of the aluminum salt solution is 8-12 wt%, and the amount of silicon powder added is 1.8%-4.5% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0019] By adopting the above technical solution, the water glass solution and aluminum salt solution of the above concentration can provide suitable reaction conditions, enabling the aluminum-modified silica gel particles to be more completely covered on the fiber surface and in its pores; while the amount of silica powder can not only bring excellent reinforcement and toughening effect, but also enable the aluminum-modified silica gel particles coated with silica powder to play a stabilizing role; thus, the modified Al2O3-ZrO2 eutectic ceramic fiber obtained by the above application makes the final antistatic shielding packaging bag have excellent and stable bending resistance.

[0020] Preferably, the concentration of the water glass solution is 25 wt%, the concentration of the aluminum salt solution is 10 wt%, and the amount of silicon powder added is 3% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0021] By adopting the above technical solution, the above selection enables the antistatic shielding packaging bag obtained by using modified Al2O3-ZrO2 eutectic ceramic fiber to maintain relatively excellent and stable antistatic shielding performance even after being subjected to frequent bending.

[0022] Preferably, the Al2O3-ZrO2 eutectic ceramic fiber raw material has a diameter of 40-60 nm and a length of 1-3 mm.

[0023] By adopting the above technical solution, the modified Al2O3-ZrO2 eutectic ceramic fibers obtained by modifying the Al2O3-ZrO2 eutectic ceramic fibers of the above specifications are more suitable for use in the protective layer and play an excellent stabilizing role, ensuring that the obtained antistatic shielding packaging bag has relatively excellent and stable bending resistance. However, when the size is small, the dispersibility of the modified Al2O3-ZrO2 eutectic ceramic fibers is poor. When the size is large, the stress transmission ability brought by the application of modified Al2O3-ZrO2 eutectic ceramic fibers is poor. Both of these will lead to a significant loss of the antistatic shielding performance of the antistatic shielding packaging bag after being subjected to frequent bending.

[0024] Preferably, the antistatic agent is one or a combination of several of sodium silicone sulfonate, sodium alkylbenzene, ammonium alkylbenzene, sodium triethylphosphonate, polyethylene glycol triethyl phosphate, and sodium carbamate.

[0025] By adopting the above technical solutions, the above-mentioned antistatic agents can be uniformly dispersed among the components of the protective layer after application, and the formed protective layer has antistatic properties, thereby improving the overall antistatic shielding performance of the packaging bag.

[0026] Preferably, the film-forming aid is one or a combination of several of propylene glycol butyl ether, ethylene glycol butyl ether, diethylene glycol butyl ether, and dipropylene glycol methyl ether.

[0027] By adopting the above technical solution, the film-forming aid has good compatibility, and the mixture of it with the raw materials of each component in the protective layer has excellent fluidity. After coating, it has excellent film-forming properties and can form a protective layer with a smooth structure, thereby obtaining a high-quality antistatic shielding packaging bag.

[0028] Preferably, the filler is one or a combination of several of the following: bentonite, calcium carbonate, kaolin, quartz powder, silica, mica powder, and wollastonite powder.

[0029] By adopting the above technical solutions, and selecting appropriate fillers according to the actual application environment of the antistatic shielding packaging bags, a variety of packaging bags with excellent and stable antistatic shielding performance can be obtained, which have excellent overall applicability.

[0030] Secondly, this application provides a method for preparing an antistatic shielding packaging bag, which adopts the following technical solution: A method for preparing an antistatic shielding packaging bag includes the following steps:

[0031] (1) Prepare raw materials including acrylic resin emulsion, antistatic agent, film-forming aid, filler, solvent and modified Al2O3-ZrO2 eutectic ceramic fiber according to the formula, as well as packaging bag body, adhesive and aluminum foil layer;

[0032] (2) The outer surface of the packaging bag body in step (1) is bonded to the aluminum foil layer with an adhesive. Then, the acrylic resin emulsion, antistatic agent, film-forming aid, filler, solvent and modified Al2O3-ZrO2 eutectic ceramic fiber are mixed evenly and coated on the surface of the aluminum foil layer. After curing into a film, a protective layer is formed. Finally, the antistatic shielding packaging bag can be obtained by bag making.

[0033] By adopting the above technical solution, the above preparation method is simple to operate and easy to carry out large-scale industrial production; and after the modified Al2O3-ZrO2 eutectic ceramic fiber is used in the resin emulsion and coated to form a protective layer, it can play an excellent stabilizing role and obtain an antistatic shielding packaging bag with excellent bending resistance.

[0034] Preferably, in step (2), the thickness of the protective layer is 20-40 μm.

[0035] By adopting the above technical solution, the protective layer of the above thickness can maintain high stability under frequent bending, and enable the modified Al2O3-ZrO2 eutectic ceramic fiber to play a full and stable role, thereby ensuring that the packaging bag can still maintain relatively excellent and stable antistatic shielding performance after being subjected to frequent bending.

[0036] In summary, this application has the following beneficial effects:

[0037] 1. This application modifies Al2O3-ZrO2 eutectic ceramic fibers to cover their surface and pores with aluminum-modified silica gel particles containing silica powder. The modified Al2O3-ZrO2 eutectic ceramic fibers are then applied to the protective layer. This not only adjusts the internal and external stresses of the protective layer when bending occurs, but also keeps the aluminum foil layer and the protective layer in sync and prevents damage. This greatly improves the stability of the antistatic shielding performance of the packaging bag when subjected to frequent bending.

[0038] 2. In the preparation of modified Al2O3-ZrO2 eutectic ceramic fibers, this application optimizes the concentration of water glass solution, the concentration of aluminum salt solution, the amount of silicon powder added, and the specifications of the raw materials used for Al2O3-ZrO2 eutectic ceramic fibers, so that the modified Al2O3-ZrO2 eutectic ceramic fibers can produce antistatic shielding packaging bags with excellent bending resistance after application. Detailed Implementation

[0039] The present application will be further described in detail below with reference to the embodiments.

[0040] Unless otherwise specified, all raw materials used in the preparation examples and embodiments of this application are commercially available: Al2O3-ZrO2 eutectic ceramic fiber raw material was prepared by referring to ("Preparation of Al2O3-ZrO2 Fiber by Sol-Gel Method", Wang Zhongjian et al., Bulletin of the Chinese Ceramic Society, No. 5, 1992);

[0041] The acrylic resin emulsion was purchased from Weizhanxin EBECRYL 853 UV-curable acrylic resin emulsion;

[0042] The packaging bag itself is made of transparent PVC roll material purchased from Suzhou Aokai Polymer Materials Co., Ltd., with a thickness of 1mm and a specific gravity of 1.36-1.45g / cm³. 3 ;

[0043] The adhesive was purchased from Dow Nucrel 0903HC aluminum foil adhesive.

[0044] The aluminum foil layer was purchased from Shanghai Guowo Aluminum Co., Ltd., and the material is 8011 with a thickness of 0.01mm.

[0045] Preparation examples of raw materials and / or intermediates

[0046] Preparation Example 1

[0047] A modified Al2O3-ZrO2 eutectic ceramic fiber is prepared by the following steps:

[0048] Take Al2O3-ZrO2 eutectic ceramic fiber raw material, immerse it in water glass solution, take it out and dry it, then immerse it in aluminum salt solution containing silicon powder, adjust the pH to 2, and keep it at 55℃ for 125 minutes. Finally, take it out, wash and dry it to obtain modified Al2O3-ZrO2 eutectic ceramic fiber.

[0049] Note: In the above operation, the concentration of water glass solution is 25wt%, the concentration of aluminum salt solution is 10wt%, the amount of silicon powder added is 3% of the weight of Al2O3-ZrO2 eutectic ceramic fiber raw material; and the aluminum salt solution is aluminum sulfate solution, the particle size of silicon powder is 10nm, the diameter of Al2O3-ZrO2 eutectic ceramic fiber raw material is 50nm, and the length is 2mm.

[0050] Preparation Example 2

[0051] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that it is prepared by the following steps: taking Al2O3-ZrO2 eutectic ceramic fiber raw material, immersing it in a water glass solution, taking it out and drying it, then immersing it in an aluminum salt solution containing silicon powder, adjusting the pH to 1.5, and maintaining it at 50°C for 150 min, and finally taking it out, washing and drying it to obtain the modified Al2O3-ZrO2 eutectic ceramic fiber.

[0052] Preparation Example 3

[0053] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that it is prepared by the following steps: taking Al2O3-ZrO2 eutectic ceramic fiber raw material, immersing it in a water glass solution, taking it out and drying it, then immersing it in an aluminum salt solution containing silicon powder, adjusting the pH to 2.5, and maintaining it at 60°C for 100 min, and finally taking it out, washing and drying it to obtain the modified Al2O3-ZrO2 eutectic ceramic fiber.

[0054] Preparation Example 4

[0055] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 20 wt%, the concentration of the aluminum salt solution is 8 wt%, and the amount of silicon powder added is 1.8% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0056] Preparation Example 5

[0057] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 28 wt%, the concentration of the aluminum salt solution is 12 wt%, and the amount of silicon powder added is 4.5% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0058] Preparation Example 6

[0059] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 24 wt%, the concentration of the aluminum salt solution is 10 wt%, and the amount of silicon powder added is 3.15% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0060] Preparation Example 7

[0061] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from preparation example 1 in that the Al2O3-ZrO2 eutectic ceramic fiber raw material has a diameter of 40 nm and a length of 1 mm.

[0062] Preparation Example 8

[0063] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from preparation example 1 in that the Al2O3-ZrO2 eutectic ceramic fiber raw material has a diameter of 60 nm and a length of 3 mm.

[0064] Preparation Example 9

[0065] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 18 wt%, the concentration of the aluminum salt solution is 10 wt%, and the amount of silicon powder added is 3% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0066] Preparation Example 10

[0067] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 30 wt%, the concentration of the aluminum salt solution is 10 wt%, and the amount of silicon powder added is 3% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0068] Preparation Example 11

[0069] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 25 wt%, the concentration of the aluminum salt solution is 7 wt%, and the amount of silicon powder added is 3% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0070] Preparation Example 12

[0071] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 25 wt%, the concentration of the aluminum salt solution is 13 wt%, and the amount of silicon powder added is 3% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0072] Preparation Example 13

[0073] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 25 wt%, the concentration of the aluminum salt solution is 10 wt%, and the amount of silicon powder added is 1.6% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0074] Preparation Example 14

[0075] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the concentration of the water glass solution is 25 wt%, the concentration of the aluminum salt solution is 10 wt%, and the amount of silicon powder added is 4.7% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0076] Preparation Example 15

[0077] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from preparation example 1 in that the Al2O3-ZrO2 eutectic ceramic fiber raw material has a diameter of 65 nm and a length of 3.5 mm.

[0078] Preparation Example 16

[0079] A modified Al2O3-ZrO2 eutectic ceramic fiber differs from Preparation Example 1 in that the Al2O3-ZrO2 eutectic ceramic fiber raw material has a diameter of 35 nm and a length of 0.8 mm.

[0080] Example

[0081] Example 1

[0082] An antistatic shielding packaging bag includes a bag body, an aluminum foil layer fixed to the outside of the bag body by an adhesive, and a protective layer disposed on the outer side wall of the aluminum foil layer away from the bag body. The components of the protective layer and their corresponding weights are shown in Table 1. The preparation steps of the antistatic shielding packaging bag are as follows:

[0083] (1) Prepare raw materials including acrylic resin emulsion, antistatic agent, film-forming aid, filler, solvent and modified Al2O3-ZrO2 eutectic ceramic fiber according to the formula, as well as packaging bag body, adhesive and aluminum foil layer;

[0084] (2) The outer surface of the packaging bag body in step (1) is bonded to the aluminum foil layer with an adhesive. Then, the acrylic resin emulsion, antistatic agent, film-forming aid, filler, solvent and modified Al2O3-ZrO2 eutectic ceramic fiber are mixed evenly and coated on the surface of the aluminum foil layer. After curing into a film, a protective layer is formed. Finally, the antistatic shielding packaging bag can be obtained by bag making.

[0085] Note: In step (2), the adhesive layer formed by the adhesive has a thickness of 0.2 mm and the protective layer has a thickness of 30 μm; the modified Al2O3-ZrO2 eutectic ceramic fiber was obtained in Preparation Example 1; the solvent is ethyl acetate; the antistatic agent is sodium triethylphosphonate; the film-forming aid is propylene glycol butyl ether; and the filler is bentonite with a particle size of 2 μm.

[0086] Example 2-3

[0087] An antistatic shielding packaging bag differs from Example 1 in that the components of the protective layer and their corresponding weights are shown in Table 1.

[0088] Table 1. Components of the protective layer and their weight fractions (kg / part) in Examples 1-3

[0089]

[0090] Example 4

[0091] An antistatic shielding packaging bag, which differs from Example 1 in that the thickness of the protective layer is 20 μm.

[0092] Example 5

[0093] An antistatic shielding packaging bag, which differs from Example 1 in that the thickness of the protective layer is 40 μm.

[0094] Example 6

[0095] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 2.

[0096] Example 7

[0097] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 3.

[0098] Example 8

[0099] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 4.

[0100] Example 9

[0101] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 5.

[0102] Example 10

[0103] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 6.

[0104] Example 11

[0105] An antistatic shielding packaging bag, which differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 7.

[0106] Example 12

[0107] An antistatic shielding packaging bag, which differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 8.

[0108] Example 13

[0109] An antistatic shielding packaging bag, which differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 9.

[0110] Example 14

[0111] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 10.

[0112] Example 15

[0113] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 11.

[0114] Example 16

[0115] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 12.

[0116] Example 17

[0117] An antistatic shielding packaging bag, which differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 13.

[0118] Example 18

[0119] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 14.

[0120] Example 19

[0121] An antistatic shielding packaging bag, which differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 15.

[0122] Example 20

[0123] An antistatic shielding packaging bag, which differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is obtained in Preparation Example 16.

[0124] Comparative Example

[0125] Comparative Example 1

[0126] An antistatic shielding packaging bag differs from Example 1 in that the modified Al2O3-ZrO2 eutectic ceramic fiber is replaced by an equal mass of Al2O3-ZrO2 eutectic ceramic fiber raw material.

[0127] Comparative Example 2

[0128] An antistatic shielding packaging bag differs from Example 1 in that the raw materials of the protective layer do not contain modified Al2O3-ZrO2 eutectic ceramic fibers.

[0129] Performance testing test samples: The antistatic shielding packaging bags obtained in Examples 1-20 were used as test samples 1-20, and the antistatic shielding packaging bags obtained in Comparative Examples 1-2 were used as control samples 1-2. The specifications of the antistatic shielding packaging bags were 250×350mm.

[0130] Test Method: First, for test sample 1-20 and control sample 1-2, the point-to-point resistance values ​​of the inner and outer surfaces of the antistatic shielding packaging bags were measured according to GB / T 39588-2020 requirements and test methods. Second, a bending test was conducted on test sample 1-20 and control sample 1-2 using a ZT-50M bending tester. The bending angle was 90°. After 1000 bends, the point-to-point resistance values ​​of the inner and outer surfaces were measured again using the same method. Finally, the rate of change of the point-to-point resistance of the inner and outer surfaces of test sample 1-20 and control sample 1-2 were calculated. The larger the rate of change, the worse the bending resistance of the antistatic shielding packaging bag. Wherein, the rate of change of point-to-point resistance of the inner surface (%) = (point-to-point resistance value of the inner surface after bending - point-to-point resistance value of the inner surface before bending) / point-to-point resistance value of the inner surface before bending; the rate of change of point-to-point resistance of the outer surface (%) = (point-to-point resistance value of the outer surface after bending - point-to-point resistance value of the outer surface before bending) / point-to-point resistance value of the outer surface before bending.

[0131] Table 2 Test results of test sample 1-20 and control sample 1-2

[0132]

[0133] As can be seen from Example 1 and Comparative Example 2, and in conjunction with Table 2, the use of modified Al2O3-ZrO2 eutectic ceramic fibers can significantly reduce the rate of change of point-to-point resistance on both the inner and outer surfaces of the antistatic shielding packaging bag after frequent bending tests. This allows the packaging bag to maintain relatively excellent and stable antistatic shielding performance under frequent bending. Furthermore, as can be seen from Comparative Example 1 and Table 2, replacing the modified Al2O3-ZrO2 eutectic ceramic fibers with unmodified Al2O3-ZrO2 eutectic ceramic fibers, while improving the toughness of the protective layer and enhancing bending resistance, has a far less significant effect on maintaining the stability of the antistatic shielding performance of the packaging bag under frequent bending compared to using modified Al2O3-ZrO2 eutectic ceramic fibers.

[0134] Combining Examples 1-3 and 8-9 with Table 2, it can be seen that in the preparation of modified Al2O3-ZrO2 eutectic ceramic fibers, using a water glass solution concentration of 20-28 wt%, an aluminum salt solution concentration of 8-12 wt%, and silicon powder addition of 1.8%-4.5% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material ensures that the obtained modified Al2O3-ZrO2 eutectic ceramic fibers exhibit excellent and stable performance after application. Even after frequent bending, the antistatic shielding packaging bag still maintains relatively excellent and stable antistatic shielding performance. Specifically, when the water glass solution concentration is 25 wt%, the aluminum salt solution concentration is 10 wt%, and the silicon powder addition is 3% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material, the resulting antistatic shielding packaging bag obtained from the modified Al2O3-ZrO2 eutectic ceramic fiber exhibits the best bending resistance. Combined with Examples 13-18 and Table 2, it can be seen that when any of the concentrations of the water glass solution, the aluminum salt solution, and the amount of silicon powder added exceed the above range, the application effect of the modified Al2O3-ZrO2 eutectic ceramic fiber will be lost, showing an increase in the rate of change of the inner surface point-to-point resistance and the rate of change of the outer surface point-to-point resistance.

[0135] Based on Examples 1 and 11-12 and Table 2, it can be seen that when the diameter of the Al2O3-ZrO2 eutectic ceramic fiber raw material is 40-60nm and the length is 1-3mm, the modified antistatic shielding packaging bag can maintain relatively stable antistatic shielding performance after frequent bending. However, when the above specifications are exceeded, the antistatic shielding performance of the antistatic shielding packaging bag will be greatly reduced after frequent bending.

[0136] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An antistatic shielding packaging bag, comprising a packaging bag body, wherein an aluminum foil layer is fixed to the outside of the packaging bag body by an adhesive, and a protective layer is provided on the outer side wall of the aluminum foil layer away from the packaging bag body, characterized in that, The protective layer is made from raw materials comprising the following parts by weight: 40-50 parts of acrylic resin emulsion; 10-20 parts of antistatic agent; 3-5 parts of film-forming aid; 4-8 parts of filler; Solvent 35-45 parts; 3-6 parts of modified Al2O3-ZrO2 eutectic ceramic fiber; The modified Al2O3-ZrO2 eutectic ceramic fiber was prepared by the following steps: Take Al2O3-ZrO2 eutectic ceramic fiber raw material, immerse it in water glass solution, take it out and dry it, then immerse it in aluminum salt solution containing silicon powder, adjust the pH to 1.5-2.5, and keep it at 50-60℃ for 100-150 min. Finally, take it out, wash and dry it to obtain modified Al2O3-ZrO2 eutectic ceramic fiber. The concentration of the water glass solution is 20-28 wt%, the concentration of the aluminum salt solution is 8-12 wt%, and the amount of silicon powder added is 1.8%-4.5% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material. The Al2O3-ZrO2 eutectic ceramic fiber raw material has a diameter of 40-60 nm and a length of 1-3 mm.

2. The antistatic shielding packaging bag according to claim 1, characterized in that: The concentration of the water glass solution is 25 wt%, the concentration of the aluminum salt solution is 10 wt%, and the amount of silicon powder added is 3% of the weight of the Al2O3-ZrO2 eutectic ceramic fiber raw material.

3. The antistatic shielding packaging bag according to claim 1, characterized in that: The antistatic agent is one or a combination of several of the following: sodium silicone sulfonate, sodium alkylbenzoate, ammonium alkylbenzoate, sodium triethylphosphonate, polyethylene glycol triethyl phosphate, and sodium carbamate.

4. The antistatic shielding packaging bag according to claim 1, characterized in that: The film-forming aid is one or a combination of several of propylene glycol butyl ether, ethylene glycol butyl ether, diethylene glycol butyl ether, and dipropylene glycol methyl ether.

5. The antistatic shielding packaging bag according to claim 1, characterized in that: The filler is one or a combination of several of the following: bentonite, calcium carbonate, kaolin, quartz powder, silica, mica powder, and wollastonite powder.

6. The method for preparing the antistatic shielding packaging bag according to claim 1, characterized in that: Includes the following steps: (1) Prepare raw materials containing acrylic resin emulsion, antistatic agent, film-forming aid, filler, solvent and modified Al2O3-ZrO2 eutectic ceramic fiber according to the formula, as well as the packaging bag body, adhesive and aluminum foil layer; (2) The outer surface of the packaging bag body in step (1) is bonded to the aluminum foil layer with an adhesive. Then, the acrylic resin emulsion, antistatic agent, film-forming aid, filler, solvent and modified Al2O3-ZrO2 eutectic ceramic fiber are mixed evenly and coated on the surface of the aluminum foil layer. After curing into a film, a protective layer is formed. Finally, the antistatic shielding packaging bag can be obtained by bag making.

7. The method for preparing the antistatic shielding packaging bag according to claim 6, characterized in that: In step (2), the thickness of the protective layer is 20-40 μm.

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