Method for evaluating buffer performance of packaging material

Abstract

The invention discloses a method for evaluating the buffering performance of a packaging material. The method comprises the following steps: (1) determining a packaging structure; (2) determining working condition parameters; (3) sample preparation; (4) the falling height and the falling angle are adjusted; (5) carrying out drop test; (6) data acquisition; (7) extracting performance indexes; (8) verifying multiple samples; and (9) evaluating the buffer performance. The method has the following beneficial effects: (1) the verification cost is low; (2) the protective performance of the packaging material can be quantitatively analyzed; and (3) the device is suitable for various types of packaging materials and is wide in application range.

Description

Technical Field

[0001] The present invention relates to the field of packaging engineering technology, and in particular to a method for evaluating the cushioning performance of packaging materials, which is suitable for scientifically evaluating and comparing the cushioning and vibration reduction performance of cushioning packaging materials (such as foam, corrugated cardboard, bubble film, etc.). Background Art

[0002] During logistics and transportation, packaging materials play an important role in protecting products and preventing damage. The cushioning properties of packaging materials are particularly crucial for fragile, delicate, or high-value items.

[0003] Currently, the commonly used methods for evaluating the cushioning performance of packaging materials are mostly flat plate drop, free drop or actual machine verification. However, the above methods have the following defects and shortcomings:

[0004] (1) High cost of actual machine verification

[0005] Using real packaging structures and packaged objects for drop test verification will not only lead to the loss of a large amount of packaging materials and protected goods, but also make it impossible to verify certain products that require indestructible testing, resulting in high overall costs.

[0006] (2) Lack of quantitative analysis of the true mechanical state of packaging

[0007] Traditional flatbed drop, free fall and actual machine verification methods are difficult to accurately obtain the key motion states and force parameters of packaged goods during the impact process, and therefore cannot achieve quantitative analysis of the performance of cushioning materials in actual application environments.

[0008] (3) Difficulty in verifying the combined buffer solution of multiple materials and structures

[0009] Actual packaging often uses a combination of multiple cushioning materials and structures (such as corrugated cardboard + bubble film + carton inner packaging + pearl cotton, etc.). However, the existing free fall or drop hammer impact test methods are difficult to fully evaluate their synergistic cushioning performance, and there is a lack of low-cost, repeatable and quantitative evaluation solutions.

[0010] In summary, there is an urgent need for a standardized, quantifiable, and widely applicable method for measuring the cushioning performance of packaging materials to comprehensively reflect the cushioning performance of packaging materials. Summary of the Invention

[0011] Purpose of the invention: In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for evaluating the cushioning performance of packaging materials. The present invention can quantitatively evaluate the cushioning energy absorption capacity of packaging materials and the impact protection performance of packaging objects through standardized loading conditions and data processing methods.

[0012] Technical solution: A method for evaluating the cushioning performance of packaging materials, comprising the following steps:

[0013] (1) Determine the packaging structure

[0014] (11) Choice of outer packaging:

[0015] (12) Determination of equivalent packaging parameters: Determine the weight and size of the equivalent packaging based on the state of the goods to be tested;

[0016] (13) Packaging materials: Determine the shape, thickness, wrapping form and connection method of the packaging materials to be evaluated based on the usage of the packaging materials to be evaluated;

[0017] (2) Determine the operating parameters

[0018] Determine the test operating parameters based on the operating range of the packaging material to be evaluated;

[0019] (3) Sample preparation

[0020] (31) Material preparation: Prepare the required outer packaging, cushioning materials, and equivalent packaging materials according to the shape, thickness, wrapping form, and connection method of the packaging material with the goods determined in step (13);

[0021] (32) Sample assembly: Complete the assembly according to the packaging method of the packaging box to form a complete packaging box, and place it on the packaging box mounting base;

[0022] (4) Adjust the drop height and drop angle

[0023] Adjust the drop height h, drop angle α and drop angle β of the test according to the working condition parameters;

[0024] (5) Drop test

[0025] Release the package to be tested through the package mount, and flip the package mount downward 90 degrees, so that the package falls freely from the package mount and hits the drop platform;

[0026] (6) Data collection

[0027] During the box's drop, a triaxial accelerometer and a thin-film pressure sensor are used to measure the acceleration of the package and the bearing pressure on its surface, generating acceleration-time and pressure-time curves for the entire box's drop process.

[0028] (7) Performance index extraction

[0029] Extracting key performance indicators based on the acceleration-time curve and pressure-time curve obtained in step (6);

[0030] (8) Multi-sample verification

[0031] Conduct multiple batch sample tests on the same type of packaging materials or packaging solutions to verify their repeatability and stability;

[0032] (9) Buffering performance evaluation

[0033] Evaluate the performance of packaging materials based on the key performance indicators, compare various cushioning materials and packaging solutions horizontally, use a certain packaging solution as a control group, and calculate the improvement or reduction rate of the protective performance of the experimental solution.

[0034] Furthermore, the specific steps of step (11) are as follows: select the outer packaging model and size, the outer packaging is a specific model of corrugated paper box, and the specific packaging size is as follows:

[0035]

[0036]

[0037] Furthermore, the wrapping form in step (13) is one of full lamination, half wrapping, and corner wrapping.

[0038] Furthermore, the working condition parameters in step (2) include the drop height and the drop angle; wherein:

[0039] The drop height refers to the distance between the lower surface of the packaging box and the upper surface of the test drop platform, and its value range is 20cm to 200cm;

[0040] The drop angle is based on the plumb line passing through the center point of the packaging box, and is a deflection angle relative to two orthogonal directions of the horizontal plane. The drop angle includes a first drop angle α and a second drop angle β, and the value range of α and β are both -180° to 180°.

[0041] Furthermore, the key performance indicators in step (7) include:

[0042] a) Peak acceleration of equivalent packaging;

[0043] b) Peak pressure on the surface of equivalent packaging;

[0044] c) The damage area and depth of packaging materials.

[0045] Furthermore, the buffer material in step (31) is one or more of bubble film filler, polyurethane foam filler, and corrugated cardboard.

[0046] Beneficial effects: The method for evaluating the cushioning performance of packaging materials disclosed in the present invention has the following beneficial effects:

[0047] (1) Low verification cost: Using equivalent packaging to replace actual cargo can significantly reduce the cost of cushioning material evaluation.

[0048] (2) Quantitative analysis of the protective performance of packaging materials: The real physical response of packaging materials under various drop conditions can be directly obtained, and the cushioning performance of packaging materials can be quantitatively analyzed through indicators such as acceleration and pressure. The test process is standardized, the test conditions are controllable, and the results are highly comparable.

[0049] (3) Applicable to various types of packaging materials, with a wide range of applications: It can evaluate the cushioning performance of various cushioning materials and structural combinations (such as corrugated cardboard + bubble film + paper box inner packaging + pearl cotton, etc.), and has the characteristics of repeatability and quantification for different packaging solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 Schematic diagram of a device for evaluating the cushioning properties of packaging materials used in the present invention.

[0051] Figure 2 This is a schematic diagram of the position change of the movable beam and the packaging box mounting seat when the solenoid valve changes from the open state to the disconnected state.

[0052] Figure 3 This is a schematic diagram of the internal structure of the packaging box in Example 1.

[0053] Figure 4 This is a curve diagram of the acceleration-time relationship of Example 1.

[0054] 1- Drop platform; 2- Rigid bracket; 3- Anti-drop fixture; 4- Movable crossbeam; 5- Clamp; 6- Packing box; 7- Packing box mounting base; 8- Signal conditioner; 9- Signal acquisition instrument;

[0055] 61-Equivalent packaging; 62-Corrugated cardboard box; 63-Thin film pressure sensor; 64-Triaxial acceleration sensor; 65-Bubble film filler; 66-Polyurethane foam filler. DETAILED DESCRIPTION

[0056] The specific embodiments of the present invention are described in detail below.

[0057] The "ranges" disclosed herein are defined in the form of lower and upper limits. A given range is defined by selecting a lower limit and an upper limit, and the selected lower and upper limits define the boundaries of the particular range. Ranges defined in this manner can be inclusive or exclusive and can be combined arbitrarily, i.e., any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a particular parameter, it is understood that ranges of 10 to 40 and 20 to 50 are also contemplated. Furthermore, if the minimum range values ​​listed are 1 and 2, and if the maximum range values ​​listed are 3, 4, and 5, then the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise specified, the numerical range "a to b" is an abbreviation for any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 to 5" are listed herein, and "0 to 5" is simply an abbreviation for these numerical combinations.

[0058] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0059] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0060] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), indicating that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0061] Unless otherwise specified, the terms "include" and "comprising" used in this application may be open-ended or closed-ended. For example, "include" and "comprising" may mean that other components not listed may also be included or that only the listed components are included.

[0062] Unless otherwise specified, the reaction is carried out at room temperature and pressure.

[0063] Unless otherwise specified, all parts or percentages are by weight.

[0064] In the present invention, all substances used are known substances and can be purchased or synthesized by known methods.

[0065] In the present invention, the devices or equipment used are all conventional devices or equipment known in the art and are commercially available.

[0066] A method for evaluating the cushioning performance of packaging materials, which is based on an evaluation device for the cushioning performance of packaging materials for conducting experiments:

[0067] like Figure 1 As shown, the evaluation device based on the cushioning performance of packaging materials is composed of the following components:

[0068] Falling platform 1;

[0069] A rigid bracket 2, one end of which is fixedly connected to one side of the falling platform 1;

[0070] An anti-slip fixture 3 is sleeved on the rigid bracket 2. The anti-slip fixture 3 can move up and down along the rigid bracket 2 and is fixed by a locking screw;

[0071] A movable crossbeam 4, one end of which is fixedly connected to one side of the anti-slip fixture 3;

[0072] The packing box mounting seat 7 has one end connected to the other end of the movable crossbeam 4. The packing box mounting seat 7 and the movable crossbeam 4 are directly provided with a solenoid valve. When the solenoid valve is in the open state, the packing box mounting seat 7 and the movable crossbeam 4 are at a 180-degree angle; when the solenoid valve is in the disconnected state, the packing box mounting seat 7 flips downward, and it is at a 90-degree angle with the movable crossbeam 4 (such as Figure 2 As shown), for placing and releasing the packaging box 6;

[0073] A packing box 6 is arranged on the packing box mounting base 7. The packing box mounting base 7 is provided with a clamp 5 for fixing the packing box 6. An equivalent packaging object 61 is provided in the packing box 6. A triaxial acceleration sensor 64 is provided at the center of gravity of the equivalent packaging object 61. A thin film pressure sensor 63 is provided at the center of the bottom side of the equivalent packaging object 61.

[0074] The signal conditioner 8 has an output terminal of the three-axis acceleration sensor 64 and an output terminal of the thin film pressure sensor 63 connected to an input terminal of the signal conditioner 8;

[0075] A signal acquisition device 9, wherein the output end of the signal conditioner 8 is connected to the input end of the signal acquisition device 9;

[0076] The output end of a high-speed camera (not shown) is connected to the input end of the signal conditioner 8 and is used to record the entire experimental process of the packaging box 6; the installation position of the high-speed camera is adapted to the falling process of the packaging box 6.

[0077] Example 1

[0078] A method for evaluating the cushioning performance of packaging materials, using the above-mentioned evaluation device based on the cushioning performance of packaging materials, comprises the following steps:

[0079] (1) Determine the packaging structure

[0080] The outer packaging is a three-layer corrugated cardboard box of F3 size (30×25×20cm).

[0081] The goods to be tested are laptop computers, and the equivalent packaging 61 is a simulated laptop computer, designed as an aluminum alloy box with a size of 25×20×3 cm, a weight of approximately 2.0 kg, and a center of gravity located at the geometric center.

[0082] The cushioning material is a 20 mm thick polyurethane foam filler 66 and a bubble film filler 65 , which are protected by a four-corner wrapping method. The contact area of ​​the material wrapping corners is approximately 40% of the total surface area of ​​the packaging. The bubble film filler 65 is filled between the packaging box 6 and the polyurethane foam filler 66 .

[0083] (3) Determine operating parameters

[0084] To simulate the situation of falling from the shelf during transportation, the working conditions are set as follows:

[0085] Drop height h: 100cm;

[0086] Drop angle α: 45° (rotation around the X axis);

[0087] Drop angle β: 0° (no rotation around the Y axis).

[0088] (4) Sample preparation

[0089] The outer packaging, cushioning materials (polyurethane foam filler 66 and bubble film filler 65) and equivalent packaging materials are all prepared in advance, including:

[0090] The polyurethane foam filler 66 is cut and shaped by a mechanical cutting machine, and the cutting error is less than 1mm.

[0091] The triaxial acceleration sensor 64 is glued near the center of gravity of the equivalent packaging with high-strength glue, and the sensor cable is led out from the top of the packaging box, fixed and passed through the outside of the box to connect to the signal conditioner 8.

[0092] The film pressure sensor 63 is placed at the center of the bottom of the equivalent packaging, sandwiched between the packaging and the cushioning material, with the sensing direction facing vertically downward.

[0093] (5) Adjust the drop height and angle

[0094] Adjust the movable crossbar to 100 cm and use an electronic goniometer to adjust the packaging box's position so that its lower front corner faces the ground, forming an inclination angle of α = 45° and β = 0°. Confirm that the clamp is locked.

[0095] (6) Drop test

[0096] Activating the release system instantly opens the electromagnetic clamps, allowing the box to freely fall onto the drop platform. The entire process is recorded with a high-speed camera (10,000 fps) to assist in analyzing the impact posture changes.

[0097] (7) Data Collection

[0098] The data collector records the entire falling process and generates the following curve:

[0099] a) Triaxial acceleration-time curve (such as Figure 4 The peak acceleration shown occurs at 27.6ms, which is 184.8g)

[0100] b) Contact surface pressure-time curve (maximum pressure occurs at 27.5ms, which is 356.4N)

[0101] The data is exported in CSV format for subsequent analysis and processing.

[0102] (8) Performance index extraction

[0103] Based on the shock response curve, the following data are extracted:

[0104] Peak acceleration: 184.8g

[0105] Peak pressure: 356.4N

[0106] Packaging material deformation: After the drop, the four corners of the polyurethane foam were deformed to a depth of 5 to 12 mm, without penetration, and the maximum damage area was 4.2 cm 2 .

[0107] (9) Multi-sample verification

[0108] Repeat the test 5 times for the above configuration, and calculate the average and standard deviation of key indicators:

[0109] index average value Standard deviation Peak acceleration (g) 183.7 5.6 Peak pressure (N) 358.4 9.2

[0110] The fluctuation of each indicator is controlled within ±6%, which verifies its good reliability.

[0111] (10) Buffering performance evaluation

[0112] Compared with the control group using a cushioning solution of bubble film + pearl cotton combination (average peak acceleration 207.5g, peak pressure 412.1N), the protective performance of this test solution is significantly improved.

[0113] Peak acceleration reduction rate: (207.5-183.7) / 207.5=11.5%

[0114] Peak pressure reduction rate: (412.1-358.4) / 412.1=13.0%

[0115] In summary, the 20mm polyurethane foam corner wrapping structure used in this embodiment and the bubble film filler 65 filled between the packaging box 6 and the polyurethane foam filler 66 have excellent cushioning performance under the current working conditions and are recommended as the preferred cushioning material solution for the transportation packaging of laptop products.

[0116] Example 2

[0117] A method for evaluating the cushioning performance of a packaging material comprises the following steps:

[0118] (1) Determine the packaging structure

[0119] (11) Choice of outer packaging:

[0120] (12) Determination of equivalent packaging parameters: Determine the weight and size of the equivalent packaging based on the state of the goods to be tested;

[0121] (13) Packaging materials: Determine the shape, thickness, wrapping form and connection method of the packaging materials to be evaluated based on the usage of the packaging materials to be evaluated;

[0122] (2) Determine the operating parameters

[0123] Determine the test operating parameters based on the operating range of the packaging material to be evaluated;

[0124] (3) Sample preparation

[0125] (31) Material preparation: Prepare the required outer packaging, cushioning materials, and equivalent packaging materials according to the shape, thickness, wrapping form, and connection method of the packaging material with the goods determined in step (13);

[0126] (32) Sample assembly: Complete the assembly according to the packaging method of the packaging box to form a complete packaging box, and place it on the packaging box mounting base;

[0127] (4) Adjust the drop height and drop angle

[0128] Adjust the drop height h, drop angle α and drop angle β of the test according to the working condition parameters;

[0129] (5) Drop test

[0130] Release the package to be tested through the package mount, and flip the package mount downward 90 degrees, so that the package falls freely from the package mount and hits the drop platform;

[0131] (6) Data collection

[0132] During the box's drop, a triaxial accelerometer and a thin-film pressure sensor are used to measure the acceleration of the package and the bearing pressure on its surface, generating acceleration-time and pressure-time curves for the entire box's drop process.

[0133] (7) Performance index extraction

[0134] Extracting key performance indicators based on the acceleration-time curve and pressure-time curve obtained in step (6);

[0135] (8) Multi-sample verification

[0136] Conduct multiple batch sample tests on the same type of packaging materials or packaging solutions to verify their repeatability and stability;

[0137] (9) Buffering performance evaluation

[0138] Evaluate the performance of packaging materials based on the key performance indicators, compare various cushioning materials and packaging solutions horizontally, use a certain packaging solution as a control group, and calculate the improvement or reduction rate of the protective performance of the experimental solution.

[0139] Furthermore, the specific steps of step (11) are as follows: select the outer packaging model and size, the outer packaging is a specific model of corrugated paper box, and the specific packaging size is as follows:

[0140]

[0141]

[0142] In this embodiment, box F6 is selected.

[0143] Furthermore, the wrapping form in step (13) is full lamination.

[0144] Furthermore, the working condition parameters in step (2) include the drop height and the drop angle; wherein:

[0145] The drop height refers to the distance between the lower surface of the packaging box and the upper surface of the test drop platform, and its value range is 20 cm;

[0146] The drop angle is based on the plumb line passing through the center point of the packaging box, and is a deflection angle relative to two orthogonal directions of the horizontal plane. The drop angle includes a first drop angle α and a second drop angle β. The first drop angle α is -180°, and the second drop angle β is 180°.

[0147] Furthermore, the key performance indicators in step (7) include:

[0148] a) Peak acceleration of equivalent packaging;

[0149] b) Peak pressure on the surface of equivalent packaging;

[0150] c) The damage area and depth of packaging materials.

[0151] Furthermore, the buffer material in step (31) is a bubble film filler.

[0152] Example 3

[0153] A method for evaluating the cushioning performance of a packaging material comprises the following steps:

[0154] (1) Determine the packaging structure

[0155] (11) Choice of outer packaging:

[0156] (12) Determination of equivalent packaging parameters: Determine the weight and size of the equivalent packaging based on the state of the goods to be tested;

[0157] (13) Packaging materials: Determine the shape, thickness, wrapping form and connection method of the packaging materials to be evaluated based on the usage of the packaging materials to be evaluated;

[0158] (2) Determine the operating parameters

[0159] Determine the test operating parameters based on the operating range of the packaging material to be evaluated;

[0160] (3) Sample preparation

[0161] (31) Material preparation: Prepare the required outer packaging, cushioning materials, and equivalent packaging materials according to the shape, thickness, wrapping form, and connection method of the packaging material with the goods determined in step (13);

[0162] (32) Sample assembly: Complete the assembly according to the packaging method of the packaging box to form a complete packaging box, and place it on the packaging box mounting base;

[0163] (4) Adjust the drop height and drop angle

[0164] Adjust the drop height h, drop angle α and drop angle β of the test according to the working condition parameters;

[0165] (5) Drop test

[0166] Release the package to be tested through the package mount, and flip the package mount downward 90 degrees, so that the package falls freely from the package mount and hits the drop platform;

[0167] (6) Data collection

[0168] During the box's drop, a triaxial accelerometer and a thin-film pressure sensor are used to measure the acceleration of the package and the bearing pressure on its surface, generating acceleration-time and pressure-time curves for the entire box's drop process.

[0169] (7) Performance index extraction

[0170] Extracting key performance indicators based on the acceleration-time curve and pressure-time curve obtained in step (6);

[0171] (8) Multi-sample verification

[0172] Conduct multiple batch sample tests on the same type of packaging materials or packaging solutions to verify their repeatability and stability;

[0173] (9) Buffering performance evaluation

[0174] Evaluate the performance of packaging materials based on the key performance indicators, compare various cushioning materials and packaging solutions horizontally, use a certain packaging solution as a control group, and calculate the improvement or reduction rate of the protective performance of the experimental solution.

[0175] Furthermore, the specific steps of step (11) are as follows: select the outer packaging model and size, the outer packaging is a specific model of corrugated paper box, and the specific packaging size is as follows:

[0176] Corrugated carton models Size (cm) F1 box 20×15×10 F2s box 20×20×15 Box F2 30×20×15 Box F3 30×25×20 Box F4 40×30×20 Box F5 40×30×30 F6s box 60×40×30 Box F6 70×40×32 .

[0177] In this embodiment, box F3 is selected.

[0178] Furthermore, the wrapping form in step (13) is half wrapping.

[0179] Furthermore, the working condition parameters in step (2) include the drop height and the drop angle; wherein:

[0180] The drop height refers to the distance between the lower surface of the packaging box and the upper surface of the test drop platform, and its value range is 200cm;

[0181] The drop angle is based on the plumb line passing through the center point of the packaging box, and is a deflection angle relative to two orthogonal directions of the horizontal plane. The drop angle includes a first drop angle α and a second drop angle β. The first drop angle α is 180° and the second drop angle β is -180°.

[0182] Furthermore, the key performance indicators in step (7) include:

[0183] a) Peak acceleration of equivalent packaging;

[0184] b) Peak pressure on the surface of equivalent packaging;

[0185] c) The damage area and depth of packaging materials.

[0186] Furthermore, the cushioning material in step (31) is a combination of bubble film filler, polyurethane foam filler, and corrugated cardboard. The equivalent packaging is first wrapped with polyurethane foam filler, then a second wrapping is performed on the outer surface of the equivalent packaging with corrugated cardboard, and finally the space between the packaging box and the corrugated cardboard is filled with bubble film filler.

[0187] Example 4

[0188] A method for evaluating the cushioning performance of a packaging material comprises the following steps:

[0189] (1) Determine the packaging structure

[0190] (11) Choice of outer packaging:

[0191] (12) Determination of equivalent packaging parameters: Determine the weight and size of the equivalent packaging based on the state of the goods to be tested;

[0192] (13) Packaging materials: Determine the shape, thickness, wrapping form and connection method of the packaging materials to be evaluated based on the usage of the packaging materials to be evaluated;

[0193] (2) Determine the operating parameters

[0194] Determine the test operating parameters based on the operating range of the packaging material to be evaluated;

[0195] (3) Sample preparation

[0196] (31) Material preparation: Prepare the required outer packaging, cushioning materials, and equivalent packaging materials according to the shape, thickness, wrapping form, and connection method of the packaging material with the goods determined in step (13);

[0197] (32) Sample assembly: Complete the assembly according to the packaging method of the packaging box to form a complete packaging box, and place it on the packaging box mounting base;

[0198] (4) Adjust the drop height and drop angle

[0199] Adjust the drop height h, drop angle α and drop angle β of the test according to the working condition parameters;

[0200] (5) Drop test

[0201] Release the package to be tested through the package mount, and flip the package mount downward 90 degrees, so that the package falls freely from the package mount and hits the drop platform;

[0202] (6) Data collection

[0203] During the box's drop, a triaxial accelerometer and a thin-film pressure sensor are used to measure the acceleration of the package and the bearing pressure on its surface, generating acceleration-time and pressure-time curves for the entire box's drop process.

[0204] (7) Performance index extraction

[0205] Extracting key performance indicators based on the acceleration-time curve and pressure-time curve obtained in step (6);

[0206] (8) Multi-sample verification

[0207] Conduct multiple batch sample tests on the same type of packaging materials or packaging solutions to verify their repeatability and stability;

[0208] (9) Buffering performance evaluation

[0209] Evaluate the performance of packaging materials based on the key performance indicators, compare various cushioning materials and packaging solutions horizontally, use a certain packaging solution as a control group, and calculate the improvement or reduction rate of the protective performance of the experimental solution.

[0210] Furthermore, the specific steps of step (11) are as follows: select the outer packaging model and size, the outer packaging is a specific model of corrugated paper box, and the specific packaging size is as follows:

[0211]

[0212]

[0213] In this embodiment, box F4 is selected.

[0214] Furthermore, the wrapping form in step (13) is corner wrapping.

[0215] Furthermore, the working condition parameters in step (2) include the drop height and the drop angle; wherein:

[0216] The drop height refers to the distance between the lower surface of the packaging box and the upper surface of the test drop platform, and its value range is 100cm;

[0217] The drop angle is based on the plumb line passing through the center point of the packaging box, and is a deflection angle relative to two orthogonal directions of the horizontal plane. The drop angle includes a first drop angle α and a second drop angle β. The first drop angle α is 90° and the second drop angle β is 60°.

[0218] Furthermore, the key performance indicators in step (7) include:

[0219] a) Peak acceleration of equivalent packaging;

[0220] b) Peak pressure on the surface of equivalent packaging;

[0221] c) The damage area and depth of packaging materials.

[0222] Furthermore, the buffer material in step (31) is a polyurethane foam filler.

[0223] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments, and various modifications can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A method for evaluating the cushioning performance of packaging materials, characterized in that: The following steps are involved: (1) Determine the packaging structure: (11) Choice of outer packaging; (12) Determination of equivalent packaging parameters: Determine the weight and size of the equivalent packaging based on the state of the goods to be tested; (13) Packaging materials: Determine the shape, thickness, wrapping form and connection method of the packaging materials to be evaluated based on the usage of the packaging materials to be evaluated; (2) Determine the operating parameters: Determine the test operating parameters based on the operating range of the packaging material to be evaluated; (3) Sample preparation: (31) Material preparation: Prepare the required outer packaging, cushioning materials, and equivalent packaging materials according to the shape, thickness, wrapping form, and connection method of the packaging material with the goods determined in step (13); (32) Sample assembly: Complete the assembly according to the packaging method of the packaging box to form a complete packaging box, and place it on the packaging box mounting base; (4) Adjust the drop height and drop angle: Adjust the drop height h, drop angle α and drop angle β of the test according to the working condition parameters; (5) Drop test: Release the package to be tested through the package mount, and flip the package mount downward 90 degrees, so that the package falls freely from the package mount and hits the drop platform; (6) Data collection: During the box's drop, a triaxial accelerometer and a thin-film pressure sensor are used to measure the acceleration of the package and the bearing pressure on its surface, generating acceleration-time and pressure-time curves for the entire box's drop process. (7) Performance index extraction: Extracting key performance indicators based on the acceleration-time curve and pressure-time curve obtained in step (6); (8) Multi-sample verification: Conduct multiple batch sample tests on the same type of packaging materials or packaging solutions to verify their repeatability and stability; (9) Buffering performance evaluation: Evaluate the performance of packaging materials based on the key performance indicators, compare various cushioning materials and packaging solutions horizontally, use a certain packaging solution as a control group, and calculate the improvement or reduction rate of the protective performance of the experimental solution.

2. A method for evaluating the cushioning performance of packaging materials according to claim 1, characterized in that: The specific steps of step (11) are as follows: Select the outer packaging model and size. The outer packaging is a specific model of corrugated paper box. Please refer to the following table for specific packaging dimensions: 。 3. The method for evaluating the cushioning performance of packaging materials according to claim 1, wherein: The wrapping form in step (13) is one of full lamination, half wrapping and corner wrapping.

4. The method for evaluating the cushioning performance of a packaging material according to claim 1, wherein: The working condition parameters in step (2) include the drop height and the drop angle; wherein: The drop height refers to the distance between the lower surface of the packaging box and the upper surface of the test drop platform, and its value range is 20cm to 200cm; The drop angle is based on the plumb line passing through the center point of the packaging box, and is a deflection angle relative to two orthogonal directions of the horizontal plane. The drop angle includes a first drop angle α and a second drop angle β, and the value range of α and β are both -180° to 180°.

5. The method for evaluating the cushioning performance of packaging materials according to claim 1, wherein: The key performance indicators in step (7) include: a) Peak acceleration of equivalent packaging; b) Peak pressure on the surface of equivalent packaging; c) The damage area and depth of packaging materials.

6. The method for evaluating the cushioning performance of packaging materials according to claim 1, wherein: The buffer material in step (31) is one or more of bubble film filler, polyurethane foam filler, and corrugated cardboard.

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