Test method for impact resistance of thermal insulation film
Abstract: Impact resistance is an important parameter for the safety of insulation film. In this paper, Labthink FIT-01 Film impact tester on an automobile production was tested with the impact resistance of the insulation film, and by the introduction of the test principle content, scope and parameters of the device, testing processes, etc., for the enterprise A reference is provided for detecting the impact resistance of the thermal insulation film.
Keywords: thermal insulation film, impact resistance, automotive, construction, film impact tester
1 , meaning
The heat-insulating film is composed of a plastic composite material and a water-soluble pressure-sensitive adhesive. It can effectively filter ultraviolet rays and infrared rays and block the heat of solar radiation. It is used in the automotive and construction industries. With the continuous development and advancement of the thermal insulation film, its function has evolved from a single shading resistance to an explosion-proof function, that is, when the glass is broken by external force, the thermal insulation film can fix the debris and prevent the debris from splashing. In order to meet this explosion-proof function, the thermal insulation film should have good impact resistance, and it can produce good protection to the glass under the action of strong external force, keep the glass intact, and if the impact resistance is poor, the impact on the external force Underneath, the insulation film is destroyed, unable to protect and prevent the broken glass from splashing, threatening personal safety.
Figure 1 insulation film
2 , test samples
The test sample tested in this test is a brand of automotive thermal insulation film.
3 , the test basis
In this paper, the anti-pendulum impact energy of the sample is tested to characterize its impact resistance. The standard is GB/T 8809-2015 "Plastic film anti-pendulum impact test method".
4 , the principle of testing
The test equipment used in this test is the FIT-01 film impact tester, which is independently developed and produced by Jinan Languang Electromechanical Technology Co., Ltd.
Figure 2 FIT-01 film impact tester
4.1 Test principle
The pendulum of a certain specification is lowered from the fixed height to impact the sample at a certain speed, and the pendulum impact energy of the sample is obtained by testing the loss of energy of the pendulum before and after breaking the sample.
4.2 Scope of application
- Film type: It is suitable for anti-pendulum impact energy testing of plastic film, sheet and composite film, such as PP/PE composite film for food and pharmaceutical packaging bags , aluminized film, aluminum-plastic composite film, nylon film and so on.
- Paper: It is suitable for the anti-pendulum impact energy test of paper and paperboard, such as cigarette coated aluminum paper, Tetra Pak aluminum-plastic composite material.
- Standard: This equipment meets many national and international standards, such as GB/T 8809 , ASTM D3420 , NF T54-116, etc.
4.3 Equipment parameters
- 1 J , 2 J , 3 J three kinds of impact energy range can be selected, and can be extended to 5 J , the test accuracy is 0.001J , which can easily and accurately test under various test conditions; the punch size of the equipment is divided into There are three kinds of Φ25.4 mm , Φ19 mm and Φ12.7 mm . The diameter of the sample is Φ89 mm and Φ60 mm , which meets the test requirements of different samples. The equipment adopts pneumatic clamping method and pendulum pneumatics. Release and level adjustment auxiliary system can effectively avoid systematic errors caused by human factors; equipment automatically calculates and calculates test data, and displays the test results intuitively to users; supports Lystem TM laboratory data sharing system, unified management test results and tests report.
5 , the test process
5.1 Cutting 10 pieces of 100 mm × 100 mm specimens were cut from the surface of the film to be tested .
5.2 Equipment leveling According to the impact resistance of the sample, choose to install the B -type punch and the corresponding fixture, and level the equipment according to the instructions of the equipment.
5.3 Test Raise and fix the pendulum, and take one of the specimens into the fixture of the equipment to ensure that the corners of the specimen are clamped and the tension is suitable. Click on the test, the device automatically releases the pendulum so that it can freely drop the impact sample and calculate the test result after the test is over.
5.4 Repeat the test process until all 10 samples have been tested.
6 , test results
The anti-pendulum impact energy of the 10 samples tested in this test were 1.569 J , 1.627 J , 1.591 J , 1.588 J , 1.719 J , 1.584 J , 1.627 J , 1.693 J , 1.599 J , 1.609 J , average to 1.621 J.
7 , conclusion
The impact resistance of the thermal insulation film is a prerequisite for its good explosion-proof performance and has an important influence on its performance. In this paper, the anti-pendulum impact energy of automotive insulation film samples is tested to evaluate its impact resistance. The test process is simple, the equipment is easy to operate, and the test results are accurate and reliable, which can truly reflect the impact resistance of the tested samples. In addition, the impact resistance of the sample can be obtained by the free dart method to test the weight of the darts that breaks the sample, that is, the impact damage quality. The test equipment is the BMC-B1 dart impact tester . The more you understand, the more you trust! Jinan Languang Electromechanical Technology Co., Ltd. is looking forward to enhancing technical communication and cooperation with enterprises and institutions in the industry.
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