Insulated cups are an essential drinking water container in the cold weather. Every winter, consumers will pay attention to how to choose a thermos cup? What brand of thermos cup has better thermal insulation effect? With the continuous improvement of living standards, we also begin to pay attention to it. Environmental protection issues of thermal insulation cup materials. Thermos cups are utensils in contact with water, so they have received widespread attention from consumers in terms of material health.
What are the materials of the thermos cup?
First of all, the liner for making the thermos can be divided into two types: glass liner and 304 stainless steel liner. Glass liner is generally used to make tea bottles. This liner is fragile, but we know that the stability of glass material is better, so the thermos cup with glass liner can hold water, milk, tea, etc. But stainless steel can only be used to hold water, because stainless steel is a corrosion-resistant material and not acid-resistant. Therefore, if the stainless steel is loaded with acidic substances, it is easy to produce chemical reactions.
The stainless steel commonly used to make thermos cups can be divided into 304 stainless steel and 201 stainless steel. In terms of composition, 304 stainless steel has strict requirements on chromium and nickel elements. The chromium content is greater than 18% and the nickel content is greater than 8%. Therefore, this stainless steel is also called 18/8 stainless steel. However, 201 stainless steel does not have strict requirements for the content of chromium and nickel, and the main function of stainless steel is corrosion resistance. The most important elements that can play a role in corrosion resistance are chromium and nickel. Therefore, the corrosion resistance of 201 stainless steel is worse than that of 304 stainless steel, but the price is relatively cheap.