What are the safety standards for thermos cup materials?

What are the safety standards for Thermos cup materials?
When discussing the safety standards for thermos cup materials, we need to focus on multiple aspects, including material selection, production process, and the safety of the final product. The following are the safety standards for thermos cup materials compiled based on industry standards and professional information sources.

Material selection
Food grade stainless steel: The stainless steel material commonly used for the inner liner of a thermos cup should be food grade that meets national standards, that is, 304 or 316 grade. 304 stainless steel is a common food-grade stainless steel material, while 316 stainless steel is more corrosion-resistant, but relatively more expensive

National food safety standards: According to GB 4806.9-2016 "National Food Safety Standard Metal Materials and Products for Food Contact", food containers can be austenitic stainless steel, duplex stainless steel, and ferritic stainless steel

Production process
No odor: The inner liner of a normal thermos cup should be odorless, and inferior inner liner generally has a pungent smell

Material safety: The material of the thermos cup should comply with relevant national health and environmental standards, and materials containing heavy metals and harmful substances should not be used

Final product safety
GB/T 29606-2013 "Stainless Steel Vacuum Cup": This is a national standard for stainless steel vacuum Thermos Cups, bottles, pots and other beverages, which specifies the performance indicators and safety requirements of these products in detail

GB/T 40355-2021 "Stainless Steel Vacuum Insulated Container": Applicable to daily stainless steel vacuum insulated containers in contact with food, specifies the terms and definitions, classification and specifications, requirements, test methods, inspection rules, signs, labels, instructions for use, packaging, transportation and storage of stainless steel vacuum insulated containers

QB/T 5613-2021 "Stainless Steel Vacuum Porcelain Insulated Cup": Detailed provisions on the classification, requirements, test methods, inspection rules, signs, packaging, transportation and storage of insulated cups

T/QGCML 909-2023 "Stainless Steel Vacuum Insulated Cup": Specifies the terms and definitions, classification, requirements, test methods, inspection rules, signs, packaging, transportation and storage of insulated cups

GB/T 11416-2021 "Daily Insulated Containers": provides general standards for daily insulated containers, including thermos cups

Test items
Insulation efficiency: The insulation efficiency level of thermos cups is divided into five levels, with level I being the highest and level V being the lowest

Sealing: Fill the main body of the thermos cup with 50% of the volume of hot water above 90°C, seal it with the original cover (plug), and swing it up and down 10 times at a frequency of 1 time/second and an amplitude of 500mm to check for water leakage

Impact resistance: Fill the thermos cup with room temperature water, hang it vertically at a height of 400mm with a hanging rope, and drop it in a static state onto a horizontally fixed hardwood board with a thickness of more than 30mm to check for cracks and damage

In summary, the safety standards for thermos cup materials involve multiple aspects such as material selection, production process, and final product safety. These standards ensure the safety of thermos cups during production and use, and protect the health of consumers.