This standard specifies the test principle, test equipment, test samples, test procedures and test reports of the dynamic compression test method for cushioning materials for packaging. This standard is applicable to the evaluation of the cushioning performance of cushioning materials under impact and their ability to protect the products contained in them during circulation. This standard replaces GB/T8167-1987 "Dynamic Compression Test Method for Cushioning Materials for Packaging". Compared with GB/T8167-1987, this standard has the following major changes: - The requirements for dynamic compression tests to be performed by test equipment have been refined; - The requirements for random sampling of test samples have been specified; - The number of test samples for the test has been modified; - The recommended test sample size specifications have been added; - The calculation method for speed and test drop height has been added; - The requirements for test thickness measurement values ​​have been added in the test report. GB/T 8167-2008 Dynamic Compression Test Method for Packaging Cushioning Materials GB/T8167-2008 Standard download decompression password: www.bzxz.net
This standard specifies the test principle, test equipment, test samples, test procedures and test reports for the dynamic compression test method for packaging cushioning materials. This standard is applicable to the evaluation of the cushioning performance of cushioning materials under impact and their ability to protect the products contained in the circulation process.
This standard is modified to adopt the American Society for Testing and Materials standard ASTM D1596-1997 "Test Method for Shock Absorption Performance of Packaging Materials".
Compared with the American Society for Testing and Materials standard ASTM D1596-1997, the main differences between this standard and the standard are as follows:
--- The compression load for measuring the thickness of the cushioning material has been modified;
--- The precision values ​​for measuring the length, width and thickness of the cushioning material have been modified;
--- The application conditions of the test system have been expanded;
--- The test method for the use of compression boxes has been added.
This standard replaces GB/T8167-1987 "Dynamic Compression Test Method for Packaging Cushioning Materials".
Compared with GB/T8167-1987, the main changes of this standard are as follows:
--- The requirements for dynamic compression test of the test equipment are refined;
--- The requirements for random sampling of test samples are specified;
--- The number of test samples for the test is modified;
--- The recommended test sample size specifications are added;
--- The calculation method of speed and test drop height is added;
--- The requirements for the test thickness measurement value are added in the test report.
Appendix A and Appendix B of this standard are informative appendices.
This standard is proposed and managed by the National Technical Committee for Packaging Standardization (SAC/TC49).
The drafting units of this standard are: China Machinery Productivity Promotion Center, Shenzhen Meiyingsen Environmental Protection Technology Co., Ltd., and China Export Commodity Packaging Research Institute.
The main drafters of this standard are: Huang Xue, Liu Ping, Cai Shaoling, Li Jianhua, and Zhang Xiaojian.
The previous versions of the standards replaced by this standard are:
---GB/T8167-1987.
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, its latest version applies to this standard.
GB/T4857.2 Basic tests for packaging and transport packages Part 2: Temperature and humidity conditioning treatment (GB/T4857.2-2005, ISO2233:2000, MOD)

ICS55.040
National Standard of the People's Republic of China
GB/T8167-2008
Replaces GB/T8167-1987
Test method of dynamic compression for packagingcushioningmaterials
Issued on 2008-07-18
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Standardization Administration of the People's Republic of China
Implemented on 2009-01-01
GB/T8167-—2008
This standard adopts the American Society for Testing and Materials standard ASTMD1596-1997 "Test method for shock absorption performance of packaging materials", compared with the American Society for Testing and Materials standard ASTMD1596-199T, the main differences are as follows: The compression load for measuring the thickness of cushioning materials has been modified; The precision values ​​for measuring the length, width and thickness of buffer materials have been expanded. The application conditions of the test system have been expanded. The test method for using compression boxes has been added. This standard replaces GB/T8167-1987 "Dynamic compression end test method for punching materials for packaging". Compared with GB/T8167-1987, the main changes in this standard are as follows: The requirements for dynamic compression tests to be performed by test equipment have been refined. The requirements for random sampling of test samples have been specified. The number of test samples for the test has been modified. The recommended test sample size specifications have been added. The calculation method for speed and test drop height has been added. The requirements for test thickness measurement values ​​have been added to the test report. Appendices A and B of this standard are informative appendices. This standard was proposed and signed by the National Packaging Standardization Technical Committee (SAC/TC49). The drafting units of this standard are: China Machinery Productivity Promotion Center, Shenzhen Meiyingdian Environmental Protection Technology Co., Ltd., and China Export Commodity Packaging Research Institute. The main drafters of this standard are Huang Xue, Liu Zang, Cai Shaoling, Li Jianhua, and Zhang Xiaojian. The previous versions of the standards replaced by this standard are: CB/T8167-1987. 1 Scope Dynamic compression test method for cushioning materials for packaging CB/T8167-2008 This standard specifies the test principle, test equipment, test samples, test procedures and test reports for the dynamic compression test method for cushioning materials for packaging. This standard is applicable to the assessment of the cushioning performance of cushioning materials under impact and their ability to protect the products contained in them during circulation. The packaging cushioning materials applicable to this standard may be in the form of blocks, sheets, filaments, granules, and molded parts, such as EPS, EPE and other soft and hard cushioning materials. It does not apply to corrugated cardboard, EPE film, metal elastic material and shock-proof rubber. 2 Normative reference documents
The provisions in the following documents become the provisions of this standard through reference in this standard. For any dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to explore whether the latest versions of these documents can be used. For any undated referenced documents, the latest versions are applicable to this standard. GB/T4857.2 Basic test for packaging and transport packages Part 2 Temperature and humidity conditioning treatment (GB/T4857.22005SO2233:2000.MOD)
3 Test principle
Use a free-skinned weight to apply impact load to the packaging cushioning material, calculate the dynamic compression performance of the thermal shock material, and the test results are expressed as the dynamic compression characteristics of the cushioning material. 4 Test equipment
4.1 Test machine
4.1.1 The test machine should have a free-falling weight and a large mass seat. 4.1.2 The weight chain should be equipped with an acceleration sensor
4.1.3 The weight chain should be flat and able to completely cover the impact surface of the tested sample. The weight mass can be adjusted. If the weight consists of multiple mass blocks, they should be fixed as a whole. 4.14 The weight should be hard and have enough brushness to ensure that the test waveform is not distorted due to the vibration of the weight itself during the impact process.
4.1.5 The impact surface of the weight should be parallel to the surface of the test machine base and impact the test sample at the specified speed. The impact speed error should not exceed ±2%. At the same time, the weight chain should be able to impact continuously at intervals of not less than 1 minute. 4.1.6 The base of the test machine should have sufficient rigidity. The impact surface of the maximum weight should be smaller than the bottom pressure surface of the test machine. The base mass of the test machine should be at least 50 times the mass of the maximum weight.
4.1.7 If the mass of the test machine base is less than 50 times the mass of the maximum weight chain, the width and height of the weight should be less than half the length of the base. 4.2 Test system
The test system includes acceleration sensors, amplifiers, display or recording devices, etc. The test system should have sufficient frequency response. Within the measurement range, the accuracy of the test system should be within ±5%. 5 Test samples
5.1 Sampling
Test samples shall be randomly selected from finished products that have been stored for more than 24 hours. When their size cannot meet the specified requirements, it is permitted to manufacture test samples under the same conditions as the production conditions. 1
GB/T8167-2008
5.2 Size
The test sample shall be in the shape of a regular rectangular cube, with the area of ​​the upper and lower bases at least 100mm×100mm. If conditions permit, it is recommended to select test samples with an upper and lower base area of ​​200mm×200mm. In general, the thickness of the test sample shall not be less than 25mm (when the thickness is less than 25mm, it is allowed to stack and use 2. When the test material is in the form of thin flakes or granules, a compression box (see Appendix A) may be used for the test. Area is 150mm×150rmm, thickness is more than 100mm 5.3 Quantity
The number of test samples is generally selected according to the accuracy required by the test results and the test sample materials. The number of test samples in a group should be no less than 3 pieces
5.4 Measurement
5.4.1 Length and width
Along the length and width of the test sample, use a measuring tool with a minimum division value of no more than 0.05 to measure the dimensions of the two ends and the three positions in the middle, and calculate the average value, accurate to 0.1mm, 5.4.2 Thickness
Place a brush plate on the upper surface of the test sample, so that the sample is subjected to a compressive load of (0.80 ± 0.42) kP. 305 After that, under load, use a measuring tool with a value of no more than 5 per bone to measure the pain The thickness of the sample is calculated and the average value is obtained with an accuracy of 0.1 mm.
The size of the test sample such as filaments and particles should be measured using a compression box. 5.4.3 Density
Use a balance with a sensitivity of 0.001 ton
to weigh the sample and record the value. Calculate the density of the sample using formula (1):
PThe unit of the test sample quality is gram per cubic millimeter (g/mm). The unit of the test sample quality is gram:
The unit of the test sample length is millimeter (m);
The unit of the test sample width is millimeter (mm); The unit of the test sample thickness is millimeter (mm).
6 Test procedure
6.1 Pretreatment of the test sample
Before the test, select a condition for the test sample according to GB/T4857.2. The product shall be pre-treated for 24 hours. 6.2 Temperature and humidity conditions during the test
The test shall be carried out under the same temperature and humidity conditions as the pre-treatment. If the same conditions cannot be achieved, it shall be carried out under the same conditions as possible.
6.3 Test procedures
6.3.1 Before the test, measure the thickness of the test sample and use it as the original thickness (T) of the dynamic compression test. 6.3.2 Place the test sample on the base of the test machine and make its center and the center of the weight on the same vertical line. Fix the test sample appropriately and do not deform the test sample during fixation. 6.3.3 Make the weight of the test machine impact the test sample from the predetermined drop height for 5 consecutive impacts. The interval between each impact pulse shall not be less than 1 minute. Record the acceleration-time history of each impact. If the test is required to be carried out under specific conditions, it shall be ensured that the test conditions during each impact meet the specific conditions. During the test, if it is confirmed that the test sample is damaged or loses its buffering capacity before the 5th impact, the test shall be interrupted.
GB/T81672008
6.3.4 3 minutes after the impact test, measure the thickness of the test sample according to the method in 5.4.2, and use it as the thickness after the dynamic compression test (T). 6.3.5 Carry out impact tests on the remaining test samples in the group in the same way as in 6.3.1 to 6.3.4.6 If necessary, the weight of the hammer, the thickness of the test sample and the equivalent drop height can be changed, and the test can be carried out in the same way as in 6.3.16.3.5. In order to accurately depict the maximum acceleration-static stress curve, more than 5 weights should be reasonably selected for testing. If the dynamic compression residual strain of the test sample after 5 impacts under a certain test condition has reached 10%, a new test sample should be used in the test under other test conditions. 6.4 Test calculation
6.4.1 Final velocity and drop height
The calculation of final velocity and drop height is shown in formula (2) h=-V7/2g
ViV2gh
where ·
V is the specific velocity of the hammer impact, the unit height of the hammer drop is (m)) The unit of gravity increase is ()
6.4.2 Maximum acceleration
The maximum acceleration is the maximum acceleration of the shield in one continuous impact, the absolute value 6.4.3 Static stress
Static stress Before calculation, see formula (3):
Where:
Static stress is CPao.
M Mass of the weight (weight mass is Sg, single value) g Gravity force is in units of square (m/s) A Test sample impact surface precision #uu single value millimeter (mm force
6.4.4 Dynamic compression residual stress
Dynamic compression residual strain is shown in formula (4),
Where:
T Original thickness of the test sample, single value is millimeter (mm) Ta
Test sample after dynamic compression test Thickness, in millimeters (mm). 2
(3)
6.4.5 With the maximum acceleration as the ordinate and the static stress as the abscissa, draw the maximum acceleration-static stress curve. For an example, see Appendix B. 7 Test report
The test report should include the following:
a) Detailed description of the test sample, such as the name, type, shape, size, density, manufacturer, brand, date of manufacture, etc. of the material, and the number of test samples:
c) Pretreatment conditions of the test sample:
Temperature and humidity conditions during the test;||tt ||Relevant description of the test equipment;
GB/T8167—2008
Measured value of the thickness of the test sample before and after the test: g)
The mass of the test hammer;
Acceleration-time history of each test sample: h)
Maximum acceleration-static stress curve, and indicate the drop height during the test, i
Dynamic compression residual strain of the test sample; Explain the difference between the test method used and this standard; Other detailed records and descriptions;
Test date, signature of the test personnel, and seal of the test unit. m)
GB/T81672008
Appendix A
(Informative Appendix)
The shape and size of the compression box are shown in Figure A, 1. The compression box should have sufficient rigidity and not deform due to the applied load. Compression box
Compression box example
GB/T8167-2008
Appendix B
(Informative Appendix)
Maximum acceleration-static stress curve
Drop coefficient H=900mm
7=50mm
Static stress/kPa
T=100mm
T=125mm
Maximum acceleration-static stress curve example
GB/T8167-2008
People's Republic of China
National Standard
Dynamic compression test method for cushioning materials for packaging GB/T81672008
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Word count: 13,000
First edition in October 2008
First printing in October 2008
Book number: 1550661-33878
Price: 14.00 yuan
If there is any printing error, the publishing center of our company will replace it. Copyright infringement will be investigated
Report phone: 010) 6853353375Www.bzxZ.net
Word count: 13,000
First edition in October 2008
First printing in October 2008
Book number: 1550661-33878
Price: 14.00 yuan
If there is any printing error, the publishing center of our company will replace it. Copyright infringement will be investigated
Report phone: 010) 68533533
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