Intimate help on inspection methods and standards for stainless steel thermos cups

 

The stainless steel thermos cup is made of double-layered stainless steel inside and outside. Welding technology is used to combine the inner tank and the outer shell, and then vacuum technology is used to extract the air from the interlayer between the inner tank and the outer shell to achieve the effect of vacuum insulation. The quality of stainless steel thermos cups is determined by inspection. So how to inspect the stainless steel thermos cup? This article will give you a detailed introduction to the inspection methods and standards of stainless steel thermos cups, giving you some thoughtful help.

 

1. Inspection standards for stainless steel thermos cups

 

(1) Insulation efficiency: Insulation efficiency is the core indicator of insulation containers.

 

(2) Capacity: On the one hand, the capacity of the thermal insulation container is related to the ability to hold enough items, and on the other hand, it is directly related to the insulation temperature. That is, for the same diameter, the larger the capacity, the higher the insulation temperature required. Therefore, both the positive and negative deviations of the capacity of the thermal insulation container cannot be too large.

 

(3) Hot water leakage: The quality of the thermos cup involves the safety of use and affects the beauty of the use environment. To check whether there are serious problems with the quality of the thermos cup, just lift the thermos cup filled with water. If hot water leaks between the cup bladder and the cup shell, whether it is a large amount or a small amount, it means that the quality of the cup cannot pass the test.

 

(4) Impact resistance: The quality of the thermos cup directly affects the service life of the thermos cup. During the use of the product, bumps and bumps are inevitable. If the material used in the product accessories has poor shock absorption or the accuracy of the accessories is not enough, there will be a gap between the bottle bladder and the shell. Shaking and bumps during use may cause stones. Displacement of the cotton pad and cracks in the small tail will affect the thermal insulation performance of the product. In severe cases, it will also cause cracks or even breakage of the bottle bladder.

 

(5) Labeling: Regular thermos cups have relevant national standards, that is, the product name, capacity, caliber, manufacturer name and address, adopted standard number, usage methods and precautions during use are all clearly marked.

Stainless steel thermos cup

 

2. Simple inspection method for stainless steel thermos cup

 

 (1) Simple identification method of thermal insulation performance: Pour boiling water into the thermos cup and tighten the stopper or lid clockwise for 2-3 minutes. Then touch the outer surface of the cup body with your hand. If the cup body is obviously warm, especially If the lower part of the cup body heats up, it means that the product has lost its vacuum and cannot achieve good insulation effect. However, the lower part of the insulated cup is always cool. Misunderstanding: Some people use their ears to hear whether there is a sizzling sound to determine its thermal insulation performance. The ears cannot tell whether there is a vacuum.

 

 (2) Sealing performance identification method: After adding water to the cup, tighten the bottle stopper or cup lid clockwise, place the cup flat on the table, there should be no water seeping out; The response is flexible and there is no gap. Fill a cup of water and hold it upside down for four or five minutes, or shake it vigorously a few times to verify whether there is water leakage.

 

 (3) Plastic parts identification method: Features of new food-grade plastics: low odor, bright surface, no burrs, long service life and not easy to age. The characteristics of ordinary plastics or recycled plastics: strong smell, dark color, many burrs, and plastics are easy to age and break. This will not only affect the service life, but also affect drinking water hygiene.

 

 (4) Simple capacity identification method: the depth of the inner tank is basically the same as the height of the outer shell, (the difference is 16-18mm) and the capacity is consistent with the nominal value. In order to cut corners and make up for the missing weight of the material, some domestic brands add sand to the cup. , cement block. Myth: A heavier cup does not necessarily mean a better cup.

 

 (5) Simple identification method of stainless steel materials: There are many specifications of stainless steel materials, among which 18/8 means that this stainless steel material contains 18% chromium and 8% nickel. Materials that meet this standard meet the national food grade standards and are green and environmentally friendly products, and the products are rust-proof. ,preservative. Ordinary stainless steel cups are white or dark in color. If soaked in salt water with a concentration of 1% for 24 hours, rust spots will appear. Some of the elements contained in them exceed the standard and directly endanger human health.

 

(6) Cup appearance identification method. First, check whether the surface polishing of the inner and outer tanks is even and consistent, and whether there are bumps and scratches; second, check whether the mouth welding is smooth and consistent, which is related to whether the feeling of drinking water is comfortable; third, check whether the internal seal is tight and Check whether the screw plug matches the cup body; look at the mouth of the cup, the rounder the better.

 

(7) Check the label and other accessories of the cup. Check to see if the product's name, capacity, caliber, manufacturer's name and address, adopted standard number, usage method and precautions during use are marked. A manufacturer that attaches great importance to quality will strictly abide by relevant national standards and clearly indicate the performance of its products.

The above are the inspection methods and standards for stainless steel thermos cups. I hope it will be helpful to everyone.