What tests should be done on stainless steel thermos bottles before leaving the factory?

Hello everyone, "Dong Dong Talk Cup" is here. As more and more people responded to the article about the bottom and body materials of thermos cups published by the editor, more and more friends began to pay attention to whether thermos cups were tested before leaving the factory and what the tests were done. http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlBecause some friends suspect that the quality of the water cups they bought is very poor. If they were tested before leaving the factory, such water cups might not flow into the market.

I have been working in the cup and kettle industry for many years. Strictly speaking, 100% of manufacturers will test the cups before they leave the factory. However, due to different requirements for product quality and different quality standards adopted by different manufacturers, the test items and the strictness of the test are also different. http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlBelow I will tell you roughly what tests should be done before stainless steel thermos cups leave the factory. These tests are also necessary, but I will not share some tests that have high quality requirements. First, they are too professional, and second, I am worried that my peers will think that I am exaggerating and there is no need to do these tests.

Material testing

Stainless steel thermos cups are usually made of food-grade stainless steel (such as 304 stainless steel, 316 stainless steel). But in fact, no matter what kind of stainless steel thermos cup it is, it is impossible to use only stainless steel. There will also be plastic and silicone. http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlThe material testing should include all materials in the whole cup that come into contact with water except stainless steel. A more stringent test is to test all materials of the whole cup, including the materials of accessories such as straps.

Structural integrity testing

In order to ensure the integrity of the thermos cup's function, the cup's structure and workmanship need to be tested. This includes:

Welding point inspection: Check whether the welding is firm and whether there are obvious weld nodules or weld scars.

Leakage test: http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlFill the container with hot and cold water and turn it upside down for 15-30 minutes to check for leaks or liquid spills.

Thermal insulation performance test

The heat preservation and cold preservation test will be carried out using professional vacuum effect testing equipment to ensure that the water cup maintains good heat preservation and cold preservation functions when it leaves the factory.

Safety performance testing

Safety performance testing includes functional testing and material safety testing:

Functional tests include the number of times plastic accessories are used, http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlsilicone tensile tests, etc. Material safety tests include stainless steel salt spray tests, and tests on whether plastic and silicone materials in contact with water release harmful substances.

Spraying and printing inspection

Spraying inspection mainly observes the uniformity of spraying and whether there are dirty spots or variegated colors. http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlDetecting dirty spots and variegated colors does not mean that there can be no dirty spots and variegated colors on the surface of the stainless steel thermos cup leaving the factory. It must be controlled within a reasonable range according to national standards.

The printing inspection mainly checks whether there is any missing printing, missing printing, ghosting, etc., and also checks whether there is any serious color cast in the printed pattern. http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlProducts with color cast within a reasonable range are allowed to be put on the market for sale.

Packaging and transportation inspection

Package strength testing: Ensures that the packaging design can protect the product from damage during transportation.

Packaging material safety testing: http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlEnsure that the packaging materials used meet environmental protection and safety standards.

Through the above tests and inspections, manufacturers can ensure that every stainless steel thermos bottle shipped meets the standard quality requirements and provide consumers with safe, http://www.zhanyict.com/en/ProductsDetail-VB-10441.htmlreliable and high-performance products. The testing items for higher quality standards will be more and more comprehensive.