This standard specifies the pendulum impact test methods for various plastic films. GB 8809-1988 Pendulum impact test methods for plastic films GB8809-1988 Standard download decompression password: www.bzxz.net

Subject content
National Standard of the People's Republic of China
Test method for pendulum impact resistance of plastic films
This standard specifies the pendulum impact resistance test method for various plastic films. 2 Principle
UDC 678.5/7.076
620.178.7
GB8809—88
Make the hemispherical punch of the pendulum film impact tester impact and pass through the plastic film at a certain speed, and measure the energy consumed by the punch. This energy is used to evaluate the pendulum impact resistance energy of the plastic film. 3 Test instrument
3.1 Pendulum film impact tester. As shown in the figure. Operating mechanism
Schematic diagram of pendulum film impact tester
Approved by the Ministry of Light Industry of the People's Republic of China on February 13, 1988
Specimen support
Implementation on July 1, 1988
3.2 Thickness gauge
GB8809-88
The thickness gauge shall comply with the provisions of GB6672 "Mechanical measurement method for the determination of thickness of plastic film and sheet". 4 Specimens
4.1 Specimen cutting
Specimens shall be cut uniformly in the width direction of the film with qualified appearance, with an external dimension of 100mm×100mm or a diameter of 100mm. The number of specimens in each group is 10.
4.2 Conditioning of specimens
The specimens shall be placed in an environment with a temperature of 23±2℃ and a relative humidity of 45% to 55% for at least 4 hours, and the test shall be carried out in this environment. 5 Test steps
5.1 Measure the thickness of the sample according to GB6672. Measure one point at the center of each sample and take the arithmetic mean of the test results of 10 samples. 5.2 Select the punch according to the required pendulum impact energy of the sample so that the reading is between 10% and 90% of the full scale. 5.3 Calibrate the instrument according to the instrument usage rules.
5.4 Place the sample flat in the clamp and clamp it. The sample should not have wrinkles or excessive tension around it. The impact surfaces of the 10 samples should be consistent.
5.5 Move the pointer to the maximum scale, quickly release the hook of the pendulum, let the pendulum impact the sample, and record the reading. 6 Results
6.1 The test results are expressed as the arithmetic mean of the pendulum impact energy of 10 samples. Accurate to 0.02J. 6.2 Calculate the standard deviation S according to the following formula when necessary. S
Where: X,-
7Test reportWww.bzxZ.net
Single measured value;
Arithmetic mean of a group of measured values;
Number of measured values.
The test report shall include the following items:
Standard number:
E(X, - x)2
Name, material, specification, manufacturer of the sample, and indicate the impact surface of the sample, the model, specification and punch size of the instrument used, and the average thickness of each group of samples;
Arithmetic mean of the anti-pendulum impact energy of each group of samples; if necessary, give the standard deviation of the anti-pendulum impact energy of each group of samples; abnormal conditions during the test,
Test date, test personnel.
Additional instructions:
GB8809—88
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. This standard is under the jurisdiction of the Plastic Processing Applied Science Research Institute of the Ministry of Light Industry. This standard was drafted by the Plastic Processing Applied Science Research Institute of the Ministry of Light Industry. The main drafters of this standard are Wang Xiuhua and Wu Xiaobing. This standard refers to the American Society for Testing and Materials standard ASTMD3420-84 "Standard test method for pendulum impact resistance of plastic films" and the French national standard NFT54-116 "Determination of the puncture resistance of plastic films".
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.