A method for preparing a highly adhesive environmentally friendly polymer packaging material

Abstract

The present invention relates to the technical field of packaging materials, and in particular to a method for preparing a highly adhesive environmentally friendly polymer packaging material, comprising: heating a PET coil and stretching it according to a first stretching ratio to obtain a substrate; grinding a single side of the substrate, cleaning and drying it after grinding; alternately coating a first colloid and a second colloid at equal intervals on the ground surface; heating the coated substrate and stretching it along the coating direction according to a second stretching ratio to obtain a coated strip; judging whether the preparation of the coated strip meets a preset standard based on surface roughness; performing an aging treatment on the coated strip that meets the preset standard; judging whether the preparation of the coated strip after aging meets the preset standard based on an adhesive performance evaluation value; and covering the adhesive-coated surface of the coated strip that meets the preset standard with a polytetrafluoroethylene film to complete the preparation of the packaging material, thereby significantly improving the adhesive performance of the packaging material.

Description

Technical Field

[0001] The present invention relates to the field of packaging materials, and in particular to a method for preparing a highly adhesive environmentally friendly polymer packaging material. Background Art

[0002] This highly adhesive, environmentally friendly polymer packaging material utilizes a special environmentally friendly polymer formula and advanced production processes, resulting in exceptional bonding performance. Its bond strength far exceeds that of traditional packaging materials, ensuring that packaged items are not easily dislodged or damaged during transportation and storage. This material provides stable adhesion to diverse packaging materials and in diverse environments, demonstrating its wide applicability.

[0003] Chinese Patent Publication No. CN114716931A discloses a process for preparing an adhesive tape, comprising the following steps: S1, preparing a substrate; S2, preparing an adhesive layer ingredient; S3, evenly coating the adhesive layer ingredient on one surface of the substrate to produce the tape; S4, winding, rewinding, cutting, spot-testing, and packaging the produced tape. In step S1, a super-hydrophobic PET film is used as the substrate; in step S2, a silicone pressure-sensitive adhesive is used as the adhesive layer ingredient. It can be seen that the above technical solution, due to the single adhesive material and the lack of necessary testing during the preparation process, can lead to a significant decrease in the adhesive properties of the product when exposed to environmental changes, thus affecting the overall quality and application effect of the product. Summary of the Invention

[0004] To this end, the present invention provides a method for preparing a highly adhesive environmentally friendly polymer packaging material, so as to overcome the problem in the prior art of insufficient adhesiveness of the tape due to changes in ambient temperature.

[0005] To achieve the above object, the present invention provides a method for preparing a highly adhesive environmentally friendly polymer packaging material, comprising:

[0006] heating the PET roll and stretching it according to a first stretching ratio to obtain a substrate;

[0007] grinding one side of the substrate, and then cleaning and drying the substrate;

[0008] Alternately coating the first colloid and the second colloid at equal intervals on the grinding surface;

[0009] heating the coated substrate and stretching it along the coating direction according to a second stretching ratio to obtain a coated tape;

[0010] obtaining the surface roughness of the adhesive-coated surface of the coated strip and determining, based on the surface roughness, that the preparation of the coated strip does not meet the preset standard, reducing the second stretch ratio for preparing the next batch of coated substrates, or determining, based on the colloid fusion characteristic distance, the reason why the preparation of the coated strip does not meet the preset standard;

[0011] performing an aging treatment on the coated strip when it is determined based on the surface roughness that the preparation of the coated strip meets a preset standard;

[0012] Obtaining an adhesive performance evaluation value and determining whether the preparation of the coated strip after curing meets a preset standard based on the adhesive performance evaluation value;

[0013] The glue-coated surface of the cured coated strip that meets the preset standards is covered with a polytetrafluoroethylene film to complete the preparation of the packaging material.

[0014] Furthermore, whether the preparation of the coated strip meets the preset standard is determined based on the surface roughness, wherein:

[0015] If the surface roughness is less than a first preset roughness threshold, determining that the preparation of the coated strip does not meet a preset standard, and reducing the second stretch ratio for preparing a next batch of coated substrates based on the difference between the first preset roughness threshold and the surface roughness;

[0016] If the surface roughness is greater than or equal to the first preset roughness threshold and less than a second preset roughness threshold, it is determined that the preparation of the coated strip meets the preset standard, and the coated strip is subjected to an aging treatment;

[0017] If the surface roughness is greater than or equal to the second preset roughness threshold, it is determined that the preparation of the coated strip does not meet the preset standard, and the reason why the preparation of the coated strip does not meet the preset standard is determined based on the colloid fusion characteristic distance.

[0018] Furthermore, several stretching ratio adjustment methods are provided for reducing the second stretching ratio, and each stretching ratio adjustment method has a different adjustment range for the second stretching ratio.

[0019] Furthermore, under the first preset condition, a plurality of stretch ratio correction methods are provided for the second stretch ratio, and each stretch ratio correction method has a different correction range for the second stretch ratio;

[0020] The first preset condition is that the thickness of the coated strip after the adjustment of the second stretching ratio is greater than a preset thickness.

[0021] Further, the reason why the preparation of the coated strip does not meet the preset standard is determined based on the colloid fusion characteristic distance, wherein:

[0022] If the colloid fusion characteristic distance is less than a preset characteristic distance, it is determined that the reason for not meeting the preset standard is that the coating spacing between the first colloid and the second colloid does not meet the standard, and the coating spacing of the next batch of substrates is reduced according to the difference between the preset characteristic distance and the colloid fusion characteristic distance;

[0023] If the colloid fusion characteristic distance is greater than or equal to the preset characteristic distance, it is determined that the reason for not meeting the preset standard is that the heating temperature of the second stretching does not meet the standard, and the heating temperature of the second stretching is increased according to the difference between the colloid fusion characteristic distance and the preset characteristic distance.

[0024] Furthermore, the reduction amplitude of the coating spacing is positively correlated with the fusion characteristic difference, wherein the fusion characteristic difference is the difference between the preset characteristic distance and the colloid fusion characteristic distance.

[0025] Furthermore, it is determined whether the preparation of the coated strip after aging meets the preset standard according to the adhesive performance evaluation value, wherein:

[0026] If the adhesive performance evaluation value is less than a first preset evaluation threshold, it is determined that the preparation of the coated tape after aging does not meet the preset standard, and the coating amount of the first colloid and the second colloid is simultaneously increased according to the difference between the first preset evaluation threshold and the adhesive performance evaluation value;

[0027] If the adhesive performance evaluation value is greater than or equal to the first preset evaluation threshold and less than a second preset evaluation threshold, it is determined that the preparation of the coated tape after aging does not meet the preset standard, and the aging treatment time is increased according to the difference between the adhesive performance evaluation value and the first preset evaluation threshold;

[0028] If the adhesive performance evaluation value is greater than or equal to the second preset evaluation threshold, it is determined that the preparation of the coated strip after curing meets the preset standard, and the adhesive-coated surface of the cured coated strip that meets the preset standard is covered with a polytetrafluoroethylene film to complete the preparation of the packaging material.

[0029] Furthermore, the adhesive performance evaluation value is jointly determined by a first temperature adhesion coefficient and a second temperature adhesion coefficient, wherein the first temperature adhesion coefficient is jointly determined based on the initial adhesion, persistent adhesion and peeling force of the coated strip after aging at the first temperature, and the second temperature adhesion coefficient is jointly determined based on the initial adhesion, persistent adhesion and peeling force of the coated strip after aging at the second temperature.

[0030] Furthermore, the coating amounts of the first colloid and the second colloid are increased synchronously according to the difference between the first preset evaluation threshold and the adhesive performance evaluation value, wherein:

[0031] If the adhesive performance evaluation difference is less than the first preset evaluation difference, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using the first preset coating adjustment coefficient;

[0032] If the adhesive performance evaluation difference is greater than or equal to the first preset evaluation difference and less than the second preset evaluation difference, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using a second preset coating adjustment coefficient;

[0033] If the adhesive performance evaluation difference is greater than or equal to the second preset evaluation difference, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using a third preset coating adjustment coefficient;

[0034] The pasting performance evaluation difference is a difference between a first preset evaluation threshold and the pasting performance evaluation value.

[0035] Furthermore, the first colloid is polyurethane, and the second colloid is acrylic acid.

[0036] Compared with the prior art, the beneficial effect of the present invention is that: the present invention selects two colloids suitable for different ambient temperatures for alternating coating at equal intervals, and heats and stretches the coated strip to fuse the two colloids with each other, thereby enhancing the adaptability of the product and making it suitable for applications under different working conditions.

[0037] The present invention effectively improves the bonding performance of the packaging material through a sophisticated preparation process including stretching, grinding, alternating coating of double colloids and subsequent aging treatment.

[0038] The invention adopts environmentally friendly materials and does not use harmful solvents and additives in the preparation process, thereby reducing pollution to the environment.

[0039] The present invention obtains the surface roughness of the coated strip, and determines the reason why the preparation of the coated strip does not meet the preset standard based on the roughness, optimizes the preparation plan through parameter adjustment, and improves the preparation efficiency and product quality.

[0040] The present invention obtains an adhesive performance evaluation value through an adhesive performance test, determines the reason why the preparation of the coated strip after curing does not meet the preset standard based on the adhesive performance evaluation value, and further adjusts the relevant preparation parameters to ensure that the quality of each batch of products meets the preset standard, thereby improving the overall quality and stability of the product.

[0041] The present invention is provided with several deformation rate adjustment methods for reducing the deformation rate of the second stretching, and is provided with several deformation rate correction methods for the deformation rate of the second stretching under the first preset condition, so that the preparation parameters are more accurate and the high quality of the product is guaranteed.

[0042] The present invention can flexibly adjust preparation parameters such as the deformation rate of the second stretch, coating spacing, heating temperature, and glue output of the glue sprayer based on the test results. This makes the preparation process more flexible and can quickly respond to different production needs and environmental changes.

[0043] The present invention optimizes the preparation process and parameter settings to improve production efficiency while ensuring product quality. By precisely controlling parameters such as the stretching ratio and heating temperature, material waste and energy consumption can be reduced, thereby lowering production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a flow chart of a method for preparing a highly adhesive and environmentally friendly polymer packaging material according to an embodiment of the present invention;

[0045] Figure 2 This is a flow chart of determining whether the preparation of the coated strip meets a preset standard based on the surface roughness according to an embodiment of the present invention;

[0046] Figure 3 This is a flow chart of reducing the second stretching ratio according to the roughness difference according to an embodiment of the present invention;

[0047] Figure 4 This is a flow chart of an embodiment of the present invention for determining whether the preparation of the coated tape after curing meets the preset standard according to the adhesive performance evaluation value. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0049] Those skilled in the art will understand that the method of the present invention for determining a single parameter mentioned above can be to select the value with the highest proportion as the preset standard parameter based on the data distribution, use weighted summation to use the obtained value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by using the formula as the preset standard parameter or other selection methods, as long as the method of the present invention can clearly define the different specific situations in the single determination process through the obtained values.

[0050] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0051] See also Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown, they are respectively a flow chart of a method for preparing a highly adhesive environmentally friendly polymer packaging material according to an embodiment of the present invention; a flow chart of determining whether the preparation of the coated tape meets a preset standard according to the surface roughness according to an embodiment of the present invention; a flow chart of reducing the second stretching ratio according to the roughness difference according to an embodiment of the present invention; and a flow chart of determining whether the preparation of the coated tape after curing meets a preset standard according to the adhesive performance evaluation value according to an embodiment of the present invention.

[0052] A method for preparing a highly adhesive and environmentally friendly polymer packaging material according to an embodiment of the present invention includes:

[0053] Step S1, heating the PET coil and stretching it according to a first stretching ratio to obtain a substrate;

[0054] Step S2, grinding one side of the substrate, and then cleaning and drying it;

[0055] Step S3, alternately coating the first colloid and the second colloid at equal intervals on the grinding surface;

[0056] Step S4, heating the coated substrate and stretching it along the coating direction according to a second stretching ratio to obtain a coated strip;

[0057] Step S5, obtaining the surface roughness of the coated surface of the coated strip and determining that the preparation of the coated strip does not meet the preset standard based on the surface roughness, reducing the second stretch ratio for preparing the next batch of coated substrates, or determining the reason why the preparation of the coated strip does not meet the preset standard based on the colloid fusion characteristic distance;

[0058] Step S6, performing an aging treatment on the coated strip when it is determined based on the surface roughness that the preparation of the coated strip meets a preset standard;

[0059] Step S7, obtaining an adhesive performance evaluation value and determining whether the preparation of the coated strip after curing meets a preset standard based on the adhesive performance evaluation value;

[0060] Step S8, covering the adhesive coated surface of the cured coated strip that meets the preset standard with a polytetrafluoroethylene film to complete the preparation of the packaging material.

[0061] Specifically, the first stretching ratio in step S1 is the ratio of the stretched thickness of the PET coil to the thickness before stretching. The first stretching ratio is set to 0.6, for example, the thickness of the coil is stretched from 0.05 mm to 0.03 mm.

[0062] Specifically, the coating distance between the first colloid and the second colloid in step S3 is not specifically limited and can be set according to actual production conditions.

[0063] Specifically, the coating amounts of the first colloid and the second colloid are not specifically limited and can be set according to actual production conditions.

[0064] Specifically, the second stretching ratio in step S4 is not specifically limited and can be set according to actual production conditions. For example, the second stretching ratio is 0.2.

[0065] Specifically, the polytetrafluoroethylene film in step S8 is an anti-adhesive film used to protect the colloid from external pollution and damage.

[0066] Specifically, whether the preparation of the coated strip meets the preset standard is determined based on the surface roughness, wherein:

[0067] If the surface roughness is less than a first preset roughness threshold of 120 μm, determining that the preparation of the coated strip does not meet the preset standard, and reducing the second stretch ratio for the preparation of the next batch of coated substrates based on the difference between the first preset roughness threshold and the surface roughness;

[0068] If the surface roughness is greater than or equal to the first preset roughness threshold and less than a second preset roughness threshold of 150 μm, it is determined that the preparation of the coated strip meets the preset standard, and the coated strip is subjected to an aging treatment;

[0069] If the surface roughness is greater than or equal to the second preset roughness threshold, it is determined that the preparation of the coated strip does not meet the preset standard, and the reason why the preparation of the coated strip does not meet the preset standard is determined based on the colloid fusion characteristic distance.

[0070] Specifically, the second stretching ratio for preparing the next batch of coated substrates is reduced according to the difference between the first preset roughness threshold and the surface roughness, wherein,

[0071] If the roughness difference is less than the first preset roughness difference of 12 μm, the second stretching ratio is reduced to a corresponding value using the first roughness adjustment coefficient of 0.992;

[0072] If the roughness difference is greater than or equal to the first preset roughness difference and less than a second preset roughness difference of 25 μm, the second stretching ratio is reduced to a corresponding value using a second roughness adjustment coefficient of 0.985;

[0073] If the roughness difference is greater than or equal to the second preset roughness difference, the second stretching ratio is reduced to a corresponding value using a third roughness adjustment coefficient of 0.980;

[0074] The roughness difference is the difference between the first preset roughness threshold and the surface roughness.

[0075] Specifically, the second stretching ratio is corrected according to the correction difference under the first preset condition, wherein,

[0076] If the correction difference is less than the first preset correction difference of 0.015 mm, the second stretching ratio is increased to a corresponding value using the first preset roughness correction coefficient of 1.007;

[0077] If the correction difference is greater than or equal to the first preset correction difference and less than the second preset correction difference of 0.020 mm, the second stretching ratio is increased to a corresponding value using a second preset roughness correction coefficient of 1.016;

[0078] If the correction difference is greater than or equal to the second preset correction difference, the second stretching ratio is increased to a corresponding value using a third preset roughness correction coefficient of 1.022;

[0079] The correction difference is the difference between the thickness of the coated strip after the adjustment of the second stretching ratio and the preset thickness;

[0080] The first preset condition is that the second stretching ratio is adjusted and the thickness of the coated strip after adjustment is greater than a preset thickness.

[0081] Specifically, the reason why the preparation of the coated strip does not meet the preset standard is determined based on the colloid fusion characteristic distance, wherein:

[0082] If the colloid fusion characteristic distance is less than the preset characteristic distance of 0.03 mm, it is determined that the reason for not meeting the preset standard is that the coating spacing of the first colloid and the second colloid does not meet the standard, and the coating spacing of the next batch of substrates is reduced according to the difference between the preset characteristic distance and the colloid fusion characteristic distance;

[0083] If the colloid fusion characteristic distance is greater than or equal to the preset characteristic distance, it is determined that the reason for not meeting the preset standard is that the heating temperature of the second stretching does not meet the standard, and the heating temperature of the second stretching is increased according to the difference between the colloid fusion characteristic distance and the preset characteristic distance.

[0084] Specifically, the colloid fusion characteristic distance is the vertical distance from the highest point where the first colloid and the second colloid fuse to the surface of the substrate.

[0085] Specifically, the coating distance between the first colloid and the second colloid is reduced according to the fusion feature difference, wherein,

[0086] If the fusion characteristic difference is less than the first preset fusion difference of 0.007 mm, the coating spacing between the first colloid and the second colloid is reduced to a corresponding value using a low-amplitude fusion adjustment coefficient of 0.995;

[0087] If the fusion characteristic difference is greater than or equal to the first preset fusion difference and less than the second preset fusion difference of 0.012 mm, the spacing between the coatings of the first colloid and the second colloid is reduced to a corresponding value using the mid-range fusion adjustment coefficient of 0.988;

[0088] If the fusion characteristic difference is greater than or equal to the second preset fusion difference, the high-amplitude fusion adjustment coefficient of 0.982 is used to reduce the coating distance between the first colloid and the second colloid to a corresponding value;

[0089] The fusion feature difference is the difference between the preset feature distance and the colloid fusion feature distance.

[0090] Specifically, whether the preparation of the coated strip after aging meets the preset standard is determined based on the adhesive performance evaluation value, wherein:

[0091] If the adhesive performance evaluation value is less than a first preset evaluation threshold of 0.82, it is determined that the preparation of the coated tape after aging does not meet the preset standard, and the coating amount of the first colloid and the second colloid is increased synchronously according to the difference between the first preset evaluation threshold and the adhesive performance evaluation value;

[0092] If the adhesive performance evaluation value is greater than or equal to the first preset evaluation threshold and less than a second preset evaluation threshold of 0.90, it is determined that the preparation of the coated tape after aging does not meet the preset standard, and the aging treatment time is increased according to the difference between the adhesive performance evaluation value and the first preset evaluation threshold;

[0093] If the adhesive performance evaluation value is greater than or equal to the second preset evaluation threshold, it is determined that the preparation of the coated strip after curing meets the preset standard, and the adhesive-coated surface of the cured coated strip that meets the preset standard is covered with a polytetrafluoroethylene film to complete the preparation of the packaging material.

[0094] Specifically, the adhesive performance evaluation value is determined by a first-temperature adhesion coefficient and a second-temperature adhesion coefficient, wherein the first-temperature adhesion coefficient is determined based on the initial adhesion, persistent adhesion, and peeling force of the coated strip after aging at the first temperature, and the second-temperature adhesion coefficient is determined based on the initial adhesion, persistent adhesion, and peeling force of the coated strip after aging at the second temperature.

[0095] Specifically, the adhesion performance evaluation value is calculated by the following formula:

[0096]

[0097] In the formula, E represents the adhesive performance evaluation value, K1 represents the first temperature adhesive coefficient, and K2 represents the second temperature adhesive coefficient.

[0098]

[0099] In the formula, α represents the first evaluation coefficient, which is set to 0.32; T1 represents the initial tack at the first temperature; Ty represents the initial tack threshold; Ty is set to 15 mm; H1 represents the sustained tack at the first temperature; Hy represents the sustained tack threshold; Hy is set to 35 MPa; F1 represents the peel force at the first temperature; Fy represents the peel force threshold; Fy is set to 2 N / cm; β represents the first evaluation coefficient; β is set to 0.35; γ represents the first evaluation coefficient; γ is set to 0.28;

[0100]

[0101] In the formula, T2 represents the initial tack at the second temperature, H2 represents the sustained tack at the second temperature, and F2 represents the peel force at the second temperature;

[0102] Specifically, the values of initial tack, persistent tack and peel strength are obtained by testing in accordance with GB / T 4852 "Initial tack of pressure-sensitive tapes - Inclined ball method", GB / T 4851 "Test method for persistent tack of pressure-sensitive adhesive tapes" and GB / T2792 "Test method for 180° peel strength of pressure-sensitive adhesive tapes", respectively.

[0103] Specifically, the first temperature setting range is -20-20°C, and the second temperature setting range is 20-60°C. There is no specific limitation. In this embodiment, the first temperature setting is set to -20°C and the second temperature setting is set to 60°C.

[0104] Specifically, the coating amounts of the first colloid and the second colloid are increased synchronously according to the difference between the first preset evaluation threshold and the adhesive performance evaluation value, wherein,

[0105] If the adhesive performance evaluation difference is less than the first preset evaluation difference of 0.06, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using the first preset coating adjustment coefficient of 1.05;

[0106] If the adhesive performance evaluation difference is greater than or equal to the first preset evaluation difference and less than the second preset evaluation difference of 0.12, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using the second preset coating adjustment coefficient of 1.12;

[0107] If the adhesive performance evaluation difference is greater than or equal to the second preset evaluation difference, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using a third preset coating adjustment coefficient of 1.25;

[0108] The pasting performance evaluation difference is the difference between the first preset evaluation threshold and the pasting performance evaluation value.

[0109] Specifically, the first colloid is polyurethane, which has good low-temperature resistance. Within the temperature range of -20-20°C, polyurethane colloid can maintain sufficient bonding strength and elasticity, and is suitable for bonding a variety of materials. The second colloid is acrylic acid. Within the temperature range of 20-60°C, acrylic acid colloid can maintain a stable bonding effect, making it an ideal choice for many daily and industrial applications.

[0110] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0111] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for preparing a highly adhesive environmentally friendly polymer packaging material, characterized in that: include: heating the PET roll and stretching it according to a first stretching ratio to obtain a substrate; grinding one side of the substrate, and then cleaning and drying the substrate; Alternately coating the first colloid and the second colloid at equal intervals on the grinding surface; heating the coated substrate and stretching it along the coating direction according to a second stretching ratio to obtain a coated tape; obtaining the surface roughness of the coated surface of the coated strip and determining, based on the surface roughness, that the preparation of the coated strip does not meet the preset standard, reducing the second stretch ratio for preparing the next batch of coated substrates, or determining the reason why the preparation of the coated strip does not meet the preset standard based on the colloid fusion characteristic distance, where the colloid fusion characteristic distance is the vertical distance from the highest point of fusion of the first colloid and the second colloid to the substrate surface; performing an aging treatment on the coated strip when it is determined based on the surface roughness that the preparation of the coated strip meets a preset standard; Obtaining an adhesive performance evaluation value and determining whether the preparation of the coated strip after curing meets a preset standard based on the adhesive performance evaluation value; The glue-coated surface of the cured coated strip that meets the preset standards is covered with a polytetrafluoroethylene film to complete the preparation of the packaging material.

2. The method for preparing a highly adhesive environmentally friendly polymer packaging material according to claim 1, characterized in that: Determining whether the preparation of the coated strip meets a preset standard based on the surface roughness, wherein: If the surface roughness is less than a first preset roughness threshold, determining that the preparation of the coated strip does not meet a preset standard, and reducing the second stretch ratio for preparing a next batch of coated substrates based on the difference between the first preset roughness threshold and the surface roughness; If the surface roughness is greater than or equal to the first preset roughness threshold and less than a second preset roughness threshold, it is determined that the preparation of the coated strip meets the preset standard, and the coated strip is subjected to an aging treatment; If the surface roughness is greater than or equal to the second preset roughness threshold, it is determined that the preparation of the coated strip does not meet the preset standard, and the reason why the preparation of the coated strip does not meet the preset standard is determined based on the colloid fusion characteristic distance.

3. The method for preparing a highly adhesive environmentally friendly polymer packaging material according to claim 2, characterized in that: Several stretching ratio adjustment methods are provided for reducing the second stretching ratio, and each stretching ratio adjustment method has a different adjustment range for the second stretching ratio.

4. The method for preparing a highly adhesive environmentally friendly polymer packaging material according to claim 3, characterized in that: Under the first preset condition, a plurality of stretch ratio correction methods are provided for the second stretch ratio, and each stretch ratio correction method has a different correction range for the second stretch ratio; The first preset condition is that the thickness of the coated strip after the adjustment of the second stretching ratio is greater than a preset thickness.

5. The method for preparing a highly adhesive environmentally friendly polymer packaging material according to claim 4, characterized in that: The reason why the preparation of the coated strip does not meet the preset standard is determined based on the colloid fusion characteristic distance, wherein: If the colloid fusion characteristic distance is less than a preset characteristic distance, it is determined that the reason for not meeting the preset standard is that the coating spacing between the first colloid and the second colloid does not meet the standard, and the coating spacing of the next batch of substrates is reduced according to the difference between the preset characteristic distance and the colloid fusion characteristic distance; If the colloid fusion characteristic distance is greater than or equal to the preset characteristic distance, it is determined that the reason for not meeting the preset standard is that the heating temperature of the second stretching does not meet the standard, and the heating temperature of the second stretching is increased according to the difference between the colloid fusion characteristic distance and the preset characteristic distance.

6. The method for preparing a highly adhesive environmentally friendly polymer packaging material according to claim 5, characterized in that: The reduction range of the coating spacing is positively correlated with the fusion characteristic difference, wherein the fusion characteristic difference is the difference between the preset characteristic distance and the colloid fusion characteristic distance.

7. The method for preparing a highly adhesive environmentally friendly polymer packaging material according to claim 6, characterized in that: The preparation of the coated strip after aging is judged according to the adhesive performance evaluation value whether it meets the preset standard, wherein: If the adhesive performance evaluation value is less than a first preset evaluation threshold, it is determined that the preparation of the coated tape after aging does not meet the preset standard, and the coating amount of the first colloid and the second colloid is simultaneously increased according to the difference between the first preset evaluation threshold and the adhesive performance evaluation value; If the adhesive performance evaluation value is greater than or equal to the first preset evaluation threshold and less than a second preset evaluation threshold, it is determined that the preparation of the coated tape after aging does not meet the preset standard, and the aging treatment time is increased according to the difference between the adhesive performance evaluation value and the first preset evaluation threshold; If the adhesive performance evaluation value is greater than or equal to the second preset evaluation threshold, it is determined that the preparation of the coated strip after curing meets the preset standard, and the adhesive-coated surface of the cured coated strip that meets the preset standard is covered with a polytetrafluoroethylene film to complete the preparation of the packaging material.

8. The method for preparing a highly adhesive environmentally friendly polymer packaging material according to claim 7, characterized in that: The adhesion performance evaluation value is determined jointly by a first-temperature adhesion coefficient and a second-temperature adhesion coefficient, wherein the first-temperature adhesion coefficient is determined jointly based on the initial adhesion, persistent adhesion, and peeling force of the coated strip after aging at the first temperature, and the second-temperature adhesion coefficient is determined jointly based on the initial adhesion, persistent adhesion, and peeling force of the coated strip after aging at the second temperature.

9. The method for preparing a highly adhesive and environmentally friendly polymer packaging material according to claim 8, characterized in that: The coating amounts of the first colloid and the second colloid are increased synchronously according to the difference between the first preset evaluation threshold and the adhesive performance evaluation value, wherein: If the adhesive performance evaluation difference is less than the first preset evaluation difference, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using the first preset coating adjustment coefficient; If the adhesive performance evaluation difference is greater than or equal to the first preset evaluation difference and less than the second preset evaluation difference, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using a second preset coating adjustment coefficient; If the adhesive performance evaluation difference is greater than or equal to the second preset evaluation difference, the coating amounts of the first colloid and the second colloid are simultaneously increased to corresponding values using a third preset coating adjustment coefficient; The pasting performance evaluation difference is a difference between a first preset evaluation threshold and the pasting performance evaluation value.

10. The method for preparing a highly adhesive and environmentally friendly polymer packaging material according to claim 9, characterized in that: The first colloid is polyurethane, and the second colloid is acrylic acid.

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