A packaging tape that is easy to print and a preparation method thereof

Abstract

The present application relates to the technical field of packaging tapes, and more specifically, to a packaging tape that is easy to print and a preparation method thereof. The packaging tape that is easy to print is prepared by the following raw materials in parts by weight: 50-80 parts of PET masterbatch, 10-15 parts of unsaturated polyester resin, 3-5 parts of diffusant, 5-10 parts of nano-silicon dioxide, 10-20 parts of polyester polyol, 5-10 parts of polyether polyol, 1-2 parts of silane coupling agent and 0-2 parts of other auxiliary agents. The packaging tape that is easy to print is prepared by using the above formula, and has good printing performance, good strength and is not easy to break. The ink can stably adhere to the surface of the packaging tape that is easy to print and is not easy to fall off.

Description

Technical Field

[0001] The present application relates to the technical field of packaging tapes, and more specifically, to a packaging tape that is easy to print and a preparation method thereof. Background Art

[0002] In daily life, when giving gifts to elders, relatives, or friends on their birthdays, we generally need to use wrapping tape. Wrapping tape can fix and decorate gifts, and also serve as a distinction. Manufacturers will print recognizable logos on the surface of the wrapping tape to distinguish it from other products.

[0003] At present, PET plastic packaging tape is one of the most commonly used tapes for the following reasons: (1) It has strong tensile strength, which is similar to that of steel tape, and has the ductility to resist impact, which can ensure the safety of product transportation; (2) It has low elongation, which is only one-sixth of that of polypropylene tape, and can maintain tension for a long time; (3) It has good safety, and does not have the disadvantage of steel tape rusting and contaminating the tied objects, and its color is bright and visible. However, the printing performance of PET plastic packaging tape is poor, which easily causes the printed pattern to fall off or not be printed, so it needs to be improved. Summary of the invention

[0004] In order to improve the printing performance problem of PET plastic packaging tape, the present application provides a packaging tape that is easy to print and a preparation method thereof.

[0005] In the first aspect, the present application provides a packaging tape that is easy to print, using the following technical solution:

[0006] A packaging tape that is easy to print, the packaging tape that is easy to print is prepared by including the following raw materials in parts by weight:

[0007] PET masterbatch 50-80 parts

[0008] Unsaturated polyester resin 10-15 parts

[0009] 3-5 parts of diffusant

[0010] Nano silicon dioxide 5-10 parts

[0011] Polyester polyol 10-20 parts

[0012] Polyether polyol 5-10 parts

[0013] Silane coupling agent 1-2 parts

[0014] Other additives 0-2 parts.

[0015] By adopting the above technical solution, the prepared easy-to-print packaging tape has good printing performance, the ink can stably adhere to the surface of the easy-to-print packaging tape without falling off, it is suitable for more different types of inks, and has good tensile strength.

[0016] Among them, PET masterbatch, as the main component of the easy-to-print packaging tape, can improve the creep resistance, fatigue resistance, friction resistance and dimensional stability of the easy-to-print packaging tape. However, the printing performance and molding processing performance of the PET film are poor. In this regard, the present application uses polyester resin, diffusant, nano-silicon dioxide, polyester polyol, polyether polyol, silane coupling agent and other additives together to improve the adhesion of the packaging tape to ink, thereby improving the printing adaptability of the packaging tape, and in addition, it can also improve the molding processing performance of PET.

[0017] Polyester polyols and polyether polyols can improve the affinity between the easy-to-print packaging tape and ink, but they will reduce the strength of the easy-to-print packaging tape, making the packaging tape easy to break. By using it with unsaturated polyester, the strength of the easy-to-print packaging tape can be improved, making it less likely to break.

[0018] Silane coupling agents increase the affinity between PET and nano-silicon dioxide, polyester resin and nano-silicon dioxide, polyester polyol and nano-silicon dioxide, and polyether polyol and nano-silicon dioxide. The above substances combined in pairs can form physical entanglement, thus forming a packaging tape with a tight structure and good printing performance. Diffusers help to improve the fluidity of PET masterbatch, nano-silicon dioxide and unsaturated polyester resin, making the raw materials in the easy-to-print packaging tape system more evenly mixed, and improving the printing performance and strength of the easy-to-print packaging tape.

[0019] Preferably, the other auxiliary agent is at least one of an antioxidant, an anti-ultraviolet agent and an anti-aging agent.

[0020] Preferably, the silane coupling agent is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-(methacryloyloxy)propyltrimethoxysilane, fluorodecyltrimethoxysilane, trifluoropropylmethyldiethoxysilane, trifluoropropylmethyldimethoxysilane and diethylenetriaminopropyltrimethoxysilane.

[0021] Preferably, the molecular weight of the unsaturated polyester resin is 1000-3000, and the acid value is 7-15 mgKOH / g.

[0022] Preferably, the PET masterbatch is a modified PET masterbatch, and the modified PET masterbatch is prepared by the following method:

[0023] Low-viscosity hydroxy silicone oil, polylactic acid, PET and polylactic acid grafted maleic anhydride are mixed, and then granulated by melt extrusion to obtain modified PET masterbatch;

[0024] The molecular weight of the low-viscosity hydroxy silicone oil is 300-500, and the hydroxyl content is 6-9%.

[0025] The polar group PET masterbatch in PET has low surface energy and poor affinity after film formation, which makes it difficult for ink to adhere to the surface of the PET film. In the present application, the modified PET masterbatch is prepared by combining low-viscosity hydroxy silicone oil, polylactic acid, PET and polylactic acid grafted with maleic anhydride, which can effectively improve the surface energy and affinity of the PET masterbatch after film formation. The modified PET masterbatch is used to prepare a packaging tape that is easy to print, which is beneficial to improving the printing performance and processing performance of the packaging tape that is easy to print.

[0026] Under the action of polylactic acid grafted with maleic anhydride, polylactic acid and PET can be combined, thereby changing the structure of PET. At the same time, low-viscosity hydroxy silicone oil can increase the surface energy of the modified PET masterbatch.

[0027] Preferably, the molecular weight of polylactic acid is 50,000-80,000.

[0028] Preferably, the molecular weight of PET is 20,000-50,000.

[0029] Preferably, the weight parts of the raw materials used to prepare the modified PET masterbatch are as follows:

[0030] 2-5 parts of low viscosity hydroxy silicone oil

[0031] Polylactic acid 5-10 parts

[0032] PET20-30 copies

[0033] Polylactic acid grafted with 1-2 parts of maleic anhydride.

[0034] By adopting the above technical solution, the amount of raw materials used in preparing the modified PET masterbatch is optimized, and the surface energy and affinity of the modified PET masterbatch are further improved, thereby improving the printing performance of the easy-to-print packaging tape.

[0035] Preferably, the nano-silicon dioxide is modified nano-silicon dioxide, and the modified nano-silicon dioxide is prepared by the following method:

[0036] 1) placing nano-silica in a strong acid solution, ultrasonicating, eluting, and drying to obtain acidified nano-silica;

[0037] 2) Dissolve carboxymethyl fiber in water, heat until the carboxymethyl fiber is completely dissolved, cool to 50-60° C., add hydroxy silicone oil and emulsifier, stir evenly, then add crosslinking agent, heat to 90-110° C. to react for 3-4 hours, dry to obtain modified nano-silica.

[0038] By adopting the above technical solution, the compatibility of nano silicon dioxide with PET, polyester resin, polyester polyol and polyether polyol is improved, thereby improving the printing performance of the easy-to-print packaging tape.

[0039] The surface of nano-silicon dioxide is hydrophilic. When nano-silicon dioxide is mixed with PET, polyester resin, polyester polyol and polyether polyol, the compatibility is low, which will further limit the printing performance and tensile strength of the packaging tape that is easy to print. In this regard, in this application, nano-silicon dioxide is modified to improve the compatibility of nano-silicon dioxide with PET, polyester resin, polyester polyol and polyether polyol, thereby further improving the printing performance and tensile strength of the packaging tape.

[0040] Among them, the nano-silica is first acidified with a strong acid solution to change the surface chemical properties of the nano-silica, which is beneficial to the reaction between the nano-silica and hydroxy silicone oil, carboxymethyl fiber, and cross-linking agent to obtain modified nano-silica. Water and emulsification create a suitable reaction environment for the reaction, which is beneficial to the reaction.

[0041] Ultrasound can increase the reaction rate of nano-silicon dioxide and strong acid. Preferably, the ultrasonic frequency is 100-200 kHz and the ultrasonic time is 1-2 hours.

[0042] The pH of the strong acid solution is 1-3, and is preferably one of concentrated hydrochloric acid solution, concentrated sulfuric acid solution or hypochlorous acid.

[0043] At 25°C, the viscosity of hydroxy silicone oil is 2500-15000 and the hydroxyl content is 6.0-10.0%.

[0044] Preferably, the emulsifier is one of sodium dodecylbenzene sulfonate, sodium dodecyl sulfonate, sodium dodecyl sulfate or Tween.

[0045] Preferably, the crosslinking agent is one of divinylbenzene, trimethylolpropane triacrylate or diallyl phthalate, vinyl trimethoxysilane or methacryloxypropyl trimethoxysilane.

[0046] Preferably, the weight parts of the raw materials used to prepare the modified nano-silicon dioxide are as follows: 10-20 parts of nano-silicon dioxide

[0047] 10-15 parts of strong acid solution

[0048] 5-10 parts of carboxymethyl cellulose

[0049] 20-30 parts water

[0050] 2-8 parts of hydroxy silicone oil

[0051] Emulsifier 1-2 parts

[0052] 1-2 parts of crosslinking agent.

[0053] By adopting the above technical scheme, the amount of raw materials used in preparing modified nano-silica is optimized, the reaction efficiency is improved, and the compatibility of nano-silica with PET, polyester resin, polyester polyol and polyether polyol is further improved, thereby further improving the printing performance and tensile strength of the packaging tape.

[0054] Preferably, the polyester polyol has a number average molecular weight of 1000-8000 and a functionality of 2-3.

[0055] Preferably, the number average molecular weight of the polyether polyol is 2000-5000 and the functionality is 2-4.

[0056] By adopting the above technical solution, the parameters of polyester polyol and polyether polyol are optimized, and the printing performance and tensile strength of the printing performance are further improved.

[0057] In a second aspect, the present application provides a method for preparing a packaging tape that is easy to print, using the following technical solution:

[0058] A method for preparing a packaging tape that is easy to print, comprising the following steps:

[0059] According to parts by weight, PET masterbatch, unsaturated polyester resin, diffusing agent, nano silicon dioxide, polyester polyol, polyether polyol, silane coupling agent and other additives are dehydrated and extruded to obtain a packaging tape that is easy to print.

[0060] By adopting the above technical solution, the prepared easy-to-print packaging tape has good printing performance and tensile strength, and the preparation process is simple and easy to operate, which is beneficial to enterprise production.

[0061] Preferably, in the extrusion molding step, the temperature of the first heating zone is 140-150°C, the temperature of the second heating zone is 160-170°C, the temperature of the third heating zone is 160-180°C, the temperature of the fourth heating zone is 180-190°C, the temperature of the fifth heating zone is 170-180°C, and the temperature of the sixth heating zone is 150-160°C.

[0062] By adopting the above technical scheme, the temperature in the extrusion molding step is optimized, so that the PET masterbatch, unsaturated polyester resin, diffusant, nano-silica, polyester polyol, polyether polyol, silane coupling agent and other additives can be fully mixed and evenly mixed, further improving the printing performance and tensile strength of the printing performance.

[0063] In summary, this application has the following beneficial effects:

[0064] 1. The present application adopts PET masterbatch, unsaturated polyester resin, diffusant, nano-silica, polyester polyol, polyether polyol, silane coupling agent and other additives to prepare easy-to-print packaging tape, which can improve the printing performance of the easy-to-print packaging tape, improve the adhesion performance of multiple inks, make the ink not easy to fall off, adapt to more types of inks, and also improve the strength of the easy-to-print packaging tape, making it not easy to break.

[0065] 2. The present application prepares modified PET masterbatch by combining low-viscosity hydroxy silicone oil, polylactic acid, PET and polylactic acid grafted with maleic anhydride, which can effectively improve the surface energy and affinity of the PET masterbatch after film formation. The modified PET masterbatch is used to prepare easy-to-print packaging tapes, which is beneficial to improving the printing performance and processing performance of the easy-to-print packaging tapes.

[0066] 3. The present application prepares modified nano-silica by using strong acid solution, carboxymethyl cellulose, water, hydroxy silicone oil, emulsifier and cross-linking agent to improve the compatibility of nano-silica when mixed with PET, polyester resin, polyester polyol and polyether polyol, thereby improving the printing performance and tensile strength of the easy-to-print packaging tape. DETAILED DESCRIPTION

[0067] Preparation Example 1-3

[0068] Preparation Example 1

[0069] A modified PET masterbatch is prepared by the following method:

[0070] 0.02 kg of low-viscosity hydroxy silicone oil, 0.05 kg of polylactic acid, 0.2 kg of PET and 0.01 kg of polylactic acid grafted maleic anhydride were mixed, and then granulated by melt extrusion to obtain modified PET masterbatch;

[0071] The molecular weight of the low-viscosity hydroxy silicone oil is 300, and the hydroxyl content is 6%.

[0072] The molecular weight of polylactic acid is 50,000.

[0073] The molecular weight of PET is 20,000.

[0074] The difference between Preparation Example 2-3 and Preparation Example 1 is that the types, amounts and experimental parameters of some raw materials are different, and the remaining experimental steps are consistent with Preparation Example 1.

[0075] The materials and amounts used in Preparation Examples 1-3 are shown in Table 1:

[0076] Table 1 Materials and amounts used in Preparation Examples 1-3

[0077]

[0078]

[0079] Preparation Example 4-6

[0080] Preparation Example 4 A modified nano-silicon dioxide was prepared by the following method:

[0081] 1) placing 1.00 kg of nano-silicon dioxide in 1.00 kg of a strong acid solution (concentrated hydrochloric acid solution, pH=1), ultrasonicating, eluting, and drying to obtain acidified nano-silicon dioxide;

[0082] 2) Dissolve 0.50 kg of carboxymethyl fiber in 2.00 kg of water, heat until the carboxymethyl fiber is completely dissolved, cool to 50°C, add 0.20 kg of hydroxy silicone oil (viscosity is 5 mm2 at 25°C) and 0.10 kg of emulsifier (sodium dodecylbenzene sulfonate), stir evenly, then add 0.20 kg of cross-linking agent (divinylbenzene), heat to 90°C to react for 3 hours, and dry to obtain modified nano-silica.

[0083] The difference between Preparation Example 5-6 and Preparation Example 4 is that the types, amounts and experimental parameters of some raw materials are different, and the remaining experimental steps are consistent with Preparation Example 4.

[0084] The materials and amounts used in Preparation Examples 4-6 are shown in Table 2:

[0085] Table 2 Materials and amounts used in Preparation Examples 4-6

[0086]

[0087]

[0088] Example

[0089] Example 1

[0090] A packaging tape that is easy to print is prepared by the following preparation method:

[0091] 0.5Kg of commercially available PET masterbatch, 0.1Kg of unsaturated polyester resin, 0.3Kg of diffusing agent (stearic acid), 0.05Kg of commercially available nano-silicon dioxide, 0.1Kg of polyester polyol, 0.05Kg of polyether polyol and 0.01K of silane coupling agent (vinyltrimethoxysilane) were dehydrated and extruded to obtain a packaging tape that is easy to print.

[0092] In the extrusion molding step, the temperature of heating zone 1 is 140°C, the temperature of heating zone 2 is 160°C, the temperature of heating zone 3 is 160°C, the temperature of heating zone 4 is 180°C, the temperature of heating zone 5 is 170°C, and the temperature of heating zone 6 is 150°C.

[0093] Among them, unsaturated polyester resin

[0094] The number average molecular weight of the polyester polyol is 1000 and the functionality is 2.

[0095] The number average molecular weight of the polyether polyol is 2000 and the functionality is 2.

[0096] The differences between Examples 2-4 and Example 1 are: the types, amounts and test parameters of some raw materials, and the rest of the experimental steps are consistent with Example 1.

[0097] The materials and amounts used in Examples 1-4 are shown in Table 3:

[0098] Table 3 Materials and dosage used in Examples 1-4

[0099]

[0100]

[0101] Example 5

[0102] A packaging tape that is easy to print. The difference between this embodiment and Example 1 is that the PET masterbatch is commercially available, the modified nano-silicon dioxide is from Preparation Example 1, and the types, amounts, test parameters and experimental steps of the remaining raw materials are consistent with those of Example 1.

[0103] Example 6

[0104] A packaging tape that is easy to print. The difference between this embodiment and Example 1 is that the PET masterbatch comes from Preparation Example 1, the modified nano-silicon dioxide is commercially available, and the types, amounts, test parameters and experimental steps of the remaining raw materials are consistent with those of Example 1.

[0105] Example 7

[0106] A packaging tape that is easy to print. The difference between this embodiment and embodiment 1 is that in the extrusion molding step, the temperature of the first heating zone is 140°C, the temperature of the second heating zone is 160°C, the temperature of the third heating zone is 160°C, the temperature of the fourth heating zone is 180°C, the temperature of the fifth heating zone is 170°C, and the temperature of the sixth heating zone is 150°C.

[0107] Comparative Example

[0108] Comparative Example 1

[0109] A packaging tape that is easy to print. The difference between this comparative example and Example 1 is that polypropylene is used to replace an equal amount of unsaturated polyester resin, and the types, amounts, test parameters and experimental steps of other raw materials are consistent with those of Example 1.

[0110] The bending strength of polypropylene is 77kg / cm2 , melt flow rate is 100g / 10min, tensile strength is 1450MPa, elongation at break is 20%, notched impact strength is 5.0kJ / m 2 .

[0111] Comparative Example 2

[0112] A packaging tape that is easy to print. The difference between this comparative example and Example 1 is that dimethyl silicone oil is used instead of an equal amount of polyester polyol, and the types, amounts, test parameters and experimental steps of other raw materials are consistent with those of Example 1.

[0113] At 25°C, the viscosity of dimethyl silicone oil is 5000CS.

[0114] Comparative Example 3

[0115] A packaging tape that is easy to print. The difference between this comparative example and Example 1 is that dimethyl silicone oil is used instead of an equal amount of polyether polyol, and the types, amounts, test parameters and experimental steps of other raw materials are consistent with those of Example 1.

[0116] At 25°C, the viscosity of dimethyl silicone oil is 5000CS.

[0117] Comparative Example 4

[0118] A packaging tape that is easy to print. The difference between this comparative example and Example 1 is that nano titanium dioxide is used instead of an equal amount of nano silicon dioxide, and the types, amounts, test parameters and experimental steps of other raw materials are consistent with those of Example 1.

[0119] Performance testing

[0120] The printing-friendly packaging tapes prepared in Examples 1-7 and Comparative Examples 1-4 were subjected to ink adhesion performance tests and tensile strength tests.

[0121] Detection method / test method Ink adhesion performance test: Using the hundred-grid test method, the easy-to-print packaging tapes prepared in Examples 1-7 and Comparative Examples 1-4 are printed, and different types of inks are used for printing. Then, a hundred-grid knife is used to draw a 1mm*1mm wide square grid on the printed packaging tape, only the ink layer is scratched, and then the tape is flatly adhered to the surface of the drawn grid, flattened, and the tape is quickly torn off at an angle of 180°, and the evaluation requirements of ASTM are referred to 5B, 4B, 3B, 2B, 1B and 0B.

[0122] Ink 1: purchased from Shenzhen Yancaiyi Printing Material Technology Co., Ltd., model is UVA-solid plastic ink, item number is 032.

[0123] Ink 2: purchased from Guangzhou Yinuo Chemical Technology Co., Ltd., brand is Degussa, model is PRINTEXU, CAS is 1333-86-4.

[0124] Ink 3: purchased from Dongguan Caijiesi Printing Materials Co., Ltd., model number is CAIJIESI.

[0125] Ink 4: purchased from Guangzhou Ledi New Material Technology Co., Ltd., model LD53, fluidity 20-30mm / s, viscosity 80-120p.

[0126] Tensile strength test: The printing-friendly packaging tapes prepared in Examples 1-7 and Comparative Examples 1-4 were stretched in a tensile testing machine until they broke, and the maximum tensile force they endured was recorded.

[0127] The test data are shown in Table 4:

[0128] Table 4 Performance test data

[0129]

[0130] It can be seen from Examples 1-7 and Comparative Examples 1-4 in combination with Table 4 that the printing performance and tensile strength of the packaging tape can be improved by the formula and preparation method in the present application. In Examples 1-7, different types of inks are used for printing. After a hundred-grid test, various inks can be stably attached to the surface of the packaging tape that is easy to print, indicating that the packaging tape that is easy to print prepared in the present application has good printing performance.

[0131] Compared with Example 1 and Comparative Example 1, the results of the 100-grid test after printing of various inks in Example 1 are all 4B, while different results are obtained after the 100-grid test in Comparative Example 1, and the adhesion performance of the ink in Example 1 is greater than that in Comparative Example 1, indicating that the printing performance of the easy-to-print packaging tape can be improved by using unsaturated polyester resin together with PET, diffusant, nano-silica, polyester polyol, polyether polyol and silane coupling agent.

[0132] Comparing Example 1 with Comparative Example 2, the results of the 100-grid test after printing of various inks in Example 1 were all 4B, while different results were obtained after the 100-grid test in Comparative Example 2, and the adhesion performance of the ink in Example 1 was greater than that in Comparative Example 2, indicating that the printing performance of the easy-to-print packaging tape can be improved by using polyester polyols together with PET, a diffusant, nano-silica, an unsaturated polyester resin, a polyether polyol and a silane coupling agent.

[0133] Compared with Example 1 and Comparative Example 3, the results of the 100-grid test after printing of various inks in Example 1 were all 4B, while different results were obtained after the 100-grid test in Comparative Example 3, and the adhesion performance of the ink in Example 1 was greater than that in Comparative Example 3, indicating that the printing performance of the easy-to-print packaging tape can be improved by using polyether polyols together with PET, a diffusant, nano-silica, an unsaturated polyester resin, a polyester polyol and a silane coupling agent.

[0134] Comparing Example 1 with Comparative Example 4, the results of the 100-grid test after printing of various inks in Example 1 were all 4B, while different results were obtained after the 100-grid test in Comparative Example 4, and the adhesion performance of the ink in Example 1 was greater than that in Comparative Example 4, indicating that the printing performance of the easy-to-print packaging tape can be improved by using nano-silica together with PET, a diffusant, a polyester polyol, an unsaturated polyester resin, a polyether polyol and a silane coupling agent.

[0135] Comparing Example 1 with Examples 2-6, the results of the 100-grid test after printing with various inks in Example 1 were all 4B, while the results of the 100-grid test after printing with various inks in Example 2 were all 5B, and the tensile strength of the easy-to-print packaging tape in Example 2 was higher than that in Example 1, indicating that the printing performance and tensile strength of the easy-to-print packaging tape prepared by using modified PET and modified nano-silicon dioxide are improved.

[0136] Comparing Example 1 with Example 7, the results of the 100-grid test after printing with various inks in Example 1 were all 4B, while the results of the 100-grid test after printing with various inks in Example 7 were all 3B, and the tensile strength of the easy-to-print packaging tape in Example 1 was higher than that in Example 7, indicating that optimizing the extrusion molding temperature is beneficial to improving the printing performance and tensile strength of the easy-to-print packaging tape.

[0137] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A packaging tape that is easy to print, characterized in that: The printing-friendly packaging tape is prepared by including the following raw materials in parts by weight: PET masterbatch 50-80 parts Unsaturated polyester resin 10-15 parts 3-5 parts of diffusant Nano silicon dioxide 5-10 parts Polyester polyol 10-20 parts Polyether polyol 5-10 parts Silane coupling agent 1-2 parts Other additives 0-2 parts; The PET masterbatch is a modified PET masterbatch, which is prepared by the following method: low-viscosity hydroxy silicone oil, polylactic acid, PET and polylactic acid grafted maleic anhydride are mixed, and then granulated by melt extrusion to obtain the modified PET masterbatch; Among them, the molecular weight of low-viscosity hydroxy silicone oil is 300-500, and the hydroxyl content is 6-9%; The weight parts of the raw materials used to prepare the modified PET masterbatch are as follows: 2-5 parts of low viscosity hydroxy silicone oil Polylactic acid 5-10 parts PET20-30 copies Polylactic acid grafted with maleic anhydride 1-2 parts; The nano silicon dioxide is modified nano silicon dioxide, and the modified nano silicon dioxide is prepared by the following method: 1) placing nano-silica in a strong acid solution, ultrasonicating, eluting, and drying to obtain acidified nano-silica; 2) Dissolve carboxymethyl fiber in water, heat until the carboxymethyl fiber is completely dissolved, cool to 50-60°C, add hydroxy silicone oil and emulsifier, stir evenly, then add crosslinking agent, heat to 90-110°C to react for 3-4 hours, dry to obtain modified nano-silica; The weight parts of the raw materials used to prepare the modified nano-silicon dioxide are as follows: 10-20 parts of nano-silicon dioxide 10-15 parts concentrated acid solution 5-10 parts of carboxymethyl cellulose 20-30 parts water 2-8 parts of hydroxy silicone oil Emulsifier 1-2 parts 1-2 parts of crosslinking agent.

2. The packaging tape that is easy to print according to claim 1, characterized in that: The polyester polyol has a number average molecular weight of 1000-8000 and a functionality of 2-3.

3. The printing-friendly packaging tape according to claim 1, characterized in that: The number average molecular weight of the polyether polyol is 2000-5000 and the functionality is 2-4.

4. The printing-friendly packaging tape according to claim 1, characterized in that: The diffusing agent is at least one of stearic acid, stearyl alcohol, montanic acid and its derivatives, trihydroxystearin, ultrafine calcium carbonate powder and ethylene bis stearyl phthalamide.

5. A method for preparing a packaging tape that is easy to print as claimed in any one of claims 1 to 4, characterized in that: The method comprises the following preparation steps: According to parts by weight, PET masterbatch, unsaturated polyester resin, diffusing agent, nano silicon dioxide, polyester polyol, polyether polyol, silane coupling agent and other additives are dehydrated and extruded to obtain a packaging tape that is easy to print.

6. The method for preparing a packaging tape that is easy to print according to claim 5, characterized in that: In the extrusion molding step, the temperature of the first heating zone is 140-150°C, the temperature of the second heating zone is 160-170°C, the temperature of the third heating zone is 160-180°C, the temperature of the fourth heating zone is 180-190°C, the temperature of the fifth heating zone is 170-180°C, and the temperature of the sixth heating zone is 150-160°C.

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