What problems usually occur in the unqualified stainless steel water cup liner?

Since the beginning of October, I have been a little confused because of the busy work and the preparation of the content related to the water cup. So close to 20 days of time did not update, maybe let Editor brain rest enough. Today Editor suddenly thought of stainless steel water cup liner is not qualified what phenomenon, this may be some help to you. Editor also remember not very clear, the relevant article Editor is written before, if you write the content of the Editor today will be some different.

Many friends buy stainless steel water cup usually through three ways to judge whether the water cup is satisfactory, these three ways are respectively:

1, heat preservation and cold time, this is mainly for stainless steel thermos cup.

2, whether there is a smell, many friends will smell after opening.

3, the water cup is dirty, but most friends will see if it can be cleaned.

My friends, do you do the same?Editor first sure that we do so is no problem. But these three ways are the simplest, just through these three ways to judge the quality of the water cup is not enough, next Editor will share some other ways.

After purchasing the thermos cup, in addition to first checking whether the surface of the cup has paint off or deformation, we also need to check whether the function of the lid is normal. Besides these, it is the most important to check the tank inside the water cup, respectively dirty should see be smeary, dust, or rust spot?If it's rust, return it. Stainless steel cup rust what Editor do not need to talk about it?

Stainless steel cups, especially thermos cups, usually use electrolytic sandblasting process. Therefore, the qualified inner liner should be smooth, sandblasting uniform, full color, showing bright luster and not dark. Because the production process is different, some of the liner is used in the drawing process, and some are used in the drawing laser welding process. So some cups are complete without welding joints, and some have obvious welding joints.But none of this affects the judgment.

Water cup liner scratches, even very slight scratches for the listed water cup is not qualified. Some of the serious water cup will appear irregular convex marks, as if by sharp instrument scratch, such a tank must be unqualified. Believe at this time can a friend ask whether such inner liner unqualified can affect the use?

It depends on whether these scratches or convex marks are serious, and some non-serious ones really won't affect the use However, every industry has strict standards for the implementation of products, and the water cup industry is no exception. In the industry standard, this quality can only be regarded as defective products.

Not only should the liner be checked for internal problems, but also the position where the liner meets the shell. That's where the rim of the bottle is, to see if there's any paint left on it, which is definitely not allowed. Because at present the paint that cup industry uses mostly is not environmental protection paint, heavy metal content is high. Long-term use of such products on the body harm Editor in the previous article has detailed degradation.

These are just surface problems to check, the real need to check is the material of the inner tank. Many water cups will be marked with 304 stainless steel logo or 316 stainless steel logo. Editor mentioned in the previous article, these signs are not formulated by authorities, nor is any institution responsible for the water cup material produced by these factories, so shoddy phenomenon is common.

In order to reduce costs, many factories use non-food grade 201 stainless steel when writing 304 stainless steel. The water cup with 316 stainless steel is only marked with 316 symbol, and only 316 stainless steel is used at the bottom. Simple identification method Editor has also been shared in the previous article, want to know friends can read the article before the editor.

Finally, the purchase of stainless steel water cup, please fill with warm water (50℃ or so). Open the cover to stand for 5 minutes, through the reflection of the water to observe whether there is a layer of some you have some dust phenomenon, see this phenomenon, please pour out the water after a thorough cleaning.

After cleaning, fill it with warm water and let it stand for 5 minutes. If there is still this phenomenon, please return it decisively. These dust is caused by sandblasting process, sandblasting is not complete or uneven may cause this situation, at the same time, these sprayed into glass yarn is harmful to human body. If you have any more questions, please leave a comment and I will answer them carefully.