Renewable Thermos Test Guide: Comprehensive Quality Assessment for International Wholesale Buyers
Introduction
With the increasing awareness of environmental protection, renewable thermos has become a popular product in the market. For international wholesale buyers, it is crucial to ensure that the renewable thermos purchased is of reliable quality and superior performance. This article will provide you with a comprehensive renewable thermos test guide to help you make wise decisions during the procurement process.
1. Appearance and material testing
Appearance inspection: Carefully check whether the surface of the thermos is clean and smooth, and whether there are obvious scratches, pores, cracks and other defects. There should be no burrs on the parts that can be touched by hands, and the printed text and patterns should be clear and complete without blurring, fading, etc.
Material inspection:
Metal materials: Through chemical composition analysis, check whether the metal materials meet the production requirements of renewable thermos, such as whether the stainless steel liner and accessories are 12Cr18Ni9, 06Cr19Ni10 grades or other stainless steel materials with corrosion resistance not lower than them. At the same time, check whether the thickness and hardness of the metal materials are uniform, and whether there are defects such as rust.
Plastic materials: Pay attention to the hardness, wear resistance and corrosion resistance of plastic materials to ensure that they are not easily damaged during long-term use. It is particularly important to detect whether plastic materials contain toxic and harmful substances to avoid harm to consumer health.
2. Thermal insulation performance test
Hot water insulation test: Fill the thermos cup with hot water above 96℃, cover it with the original lid, and place it at the specified ambient temperature for more than 30 minutes. When the actual measured temperature of the water in the cup reaches (95±1)℃, close the inner plug. After 6 hours±5 minutes, measure the water temperature in the cup. The thermal insulation performance of the thermos cup with an inner plug should not be lower than the corresponding level.
Cold water insulation test: Similar to the hot water insulation test, fill the thermos cup with cold water, cover it with a lid, measure the water temperature after a certain period of time, and record the difference between the initial water temperature and the water temperature after placement to evaluate its thermal insulation effect in a low temperature environment.
Temperature difference insulation test: hot water and cold water are placed in the thermos cup respectively, and the temperature change outside the cup is measured to simulate the temperature difference that the thermos cup may encounter in actual use, and its insulation performance under different temperature difference environments is evaluated.
3. Sealing performance test
Water leakage test: fill the thermos cup with water and place it upside down for 4 to 5 minutes to observe whether there is water seeping out from the cup lid or cup body. In addition, you can also tighten the cup lid after filling it with water, shake it a few times, and then place it upside down to further test the sealing performance.
Vacuum layer leakage test: evacuate the thermos cup into a vacuum state, turn off the vacuum pump, and observe the changes in the air pressure in the thermos cup. If the air pressure remains stable, it means that the vacuum layer is not leaking.
Sealing performance durability test: simulate the multiple opening and closing of the lid and repeated loading of liquids in daily use, observe the changes in the sealing performance of the thermos cup under a certain number of tests and conditions, and evaluate the durability of its sealing performance.
4. Impact resistance test
Free fall test: Hang the thermos cup filled with room temperature water vertically with a hanging rope at a height of 400mm, and drop it onto a horizontal fixed hard wooden board with a thickness of more than 30mm in a static state to check whether the thermos cup has cracks or damage, and whether the insulation performance meets the requirements.
Simulated transportation test: The thermos cup can be tested with equipment that simulates the transportation environment, such as a vibration table, collision tester, etc., to evaluate its impact resistance during transportation.
5. Stability test
Fill the thermos cup with water and place it on a non-slip flat wooden board tilted at 15° to observe whether it falls over. A qualified thermos cup should have good stability to ensure safety during use.
6. Other performance tests
Handle and lifting ring installation strength test: Hang the thermos cup by the handle or lifting ring, hang a weight equivalent to 6 times the weight of the thermos cup filled with water (including all accessories), hold it for 5 minutes, and check whether the handle or lifting ring is loose, deformed, or broken.
Strength test of shoulder straps and slings: Expand the shoulder straps to the longest point or hang the thermos cup by the slings, hang a weight equivalent to 10 times the weight of the thermos cup filled with water (including all accessories), hold it for 5 minutes, and check whether the shoulder straps, slings and their connections are slipping or breaking.
Coating adhesion test: Use a single-edged cutting tool with a blade angle of 20°~30° and a blade thickness of (0.43±0.03) mm to scratch 100 (10×10) 1mm² checkerboard grids on the coating surface with a depth of bottom, stick a 25mm wide pressure-sensitive adhesive tape with an adhesion of (10±1)N/25mm, and then peel it off at a right angle. Calculate the number of residual checkerboard grids that have not been peeled off. Generally, the coating is required to retain more than 92.
Adhesion test of surface printed text and patterns: Stick the same adhesive tape on the text and pattern, peel it off at a right angle, and check whether it falls off.
7. Food safety testing
Material safety test: Use spectral analysis, chromatographic analysis and other technologies to accurately determine the content of harmful substances in the insulation cup material, such as heavy metals, plasticizers, etc., to ensure that it meets food safety standards.
Specific migration substance test: Test whether the materials in contact with food in the thermos cup will release harmful substances during use, especially for plastic thermos cups, the content of specific migration substances should be strictly controlled to protect the health of consumers.
8. Environmental performance evaluation
Renewable material content test: Verify whether the content of renewable materials in the thermos cup meets the advertised standards to ensure that it meets environmental protection requirements.
Degradability test: For thermos cups that claim to be degradable, degradability tests are required to evaluate their degradation speed and degree under specific environmental conditions to verify their environmental performance.
9. Testing standards and certification
International standards: Understand and follow the internationally common thermos cup testing standards, such as the EU EN 12546 series of standards, the US FDA standards, and the German LFGB standards. These standards have strict requirements on the performance, safety, and environmental protection of thermos cups.
Importance of certification: Certification of thermos cups by authoritative third-party certification bodies, such as CE certification, FDA certification, LFGB certification, etc., can gain recognition in the international market, enhance product competitiveness, and provide quality assurance for international wholesale buyers.
10. Summary
Through comprehensive testing and evaluation of renewable thermos cups, including appearance and material testing, thermal insulation performance testing, sealing performance testing, impact resistance testing, stability testing, other performance testing, food safety testing, and environmental performance evaluation, international wholesale buyers can accurately understand the quality of the products and ensure that the purchased renewable thermos cups meet market demand and consumer needs. At the same time, it is expected that paying attention to product testing standards and certification status is also the key to ensuring product quality and smoothly entering the international market. I hope that this test guide can provide strong support for your purchasing decisions, help you find high-quality renewable thermos cup suppliers, and jointly promote the development of environmental protection.
Post time: Jun-02-2025