People use cups to drink water. As a necessary product for filling water, cups are widely used in life. There are many styles and materials. Different types of cups have different functions. In winter, we all want to be able to drink a cup of hot water anytime, anywhere, so we can only rely on the thermos to help us achieve it. Most of the thermos cups are made of stainless steel, but some people think that the stainless steel thermos is poisonous. Here we will take a look at whether the stainless steel thermos is toxic and some of its characteristics.
First of all, it is safe to say that in some cases, stainless steel will indeed corrode and cause some chromium to dissolve. However, it must be emphasized that under normal use, the precipitation of chromium in stainless steel tableware that meets the national standard is very small, and there is no need to worry about it affecting human health.
Features of stainless steel vacuum flask
In fact, the vacuum insulation cup, the length of the insulation time depends on the structure of the cup body and the thickness of the cup material.
Generally speaking, the thinner the cup material, the longer the heat preservation time. However, the cup body is easily damaged and deformed, which affects the service life; measures such as coating the outer layer of the vacuum cup with metal film and copper plating can also increase the degree of heat preservation; large-capacity, small-diameter vacuum cups have a longer heat preservation time, on the contrary, small-capacity vacuum cups , The large-diameter vacuum insulation cup has a short holding time; the service life of the vacuum cup also depends on the cleaning of the inner layer of the cup and the time of vacuuming, and the most important thing is the structure of the vacuum furnace.
The vacuum equipment used in the society for vacuuming the vacuum flask includes a vacuum exhaust table and a vacuum brazing furnace, and there are about two types and four types. One type is benchtop with tail vacuum exhaust; the other type is brazing furnace type. The brazing furnace type is further divided into: single chamber, multi-chamber, and multi-chamber with increased pumping speed.
Single furnace type integral vacuum brazing furnace. The vacuuming cycle of the furnace is long. If the manufacturer wants to improve production efficiency and shorten the vacuuming time, it will affect the service life of the cup. The service life of the cup is only about 8 years. The vacuum cup exhaust table with tail and its advantages: the vacuum cup produced by the vacuum exhaust table with tail exhaust, the heating temperature during vacuuming is about 500 ℃, the shell of the vacuum cup is not easy to deform, but the copper pipe welding place is easy to touch Leakage, special protection is required when processing semi-finished products.
Whether the stainless steel thermos cup is good or bad depends on the specific situation, but it is certain that as long as it conforms to the national standard, there will be no problem with the produced cup, no matter what material it is, it has passed the national standard. After inspection, if it is covered with a qualified label, you can use it with confidence, without worrying about whether it will harm the human body, unless it is run by some black-hearted merchants. Stainless steel thermos is relatively better, it is more resistant to high temperature than plastic, so you can rest assured during use.
Post time: Mar-01-2022