Why did not the thermos cup keep warm for a long time?
A friend asked me that the insulation performance of the thermos cup be very good when it was first bought, but the insulation performance deteriorated soon after use? What caused it?
Before understanding this problem, let me talk about the principle and technology of the water cup for insulation. The insulated water cup must first be double-layered. Secondly, the water cup needs to be vacuumed. At the same time, in order to ensure the heat preservation effect and increase the heat preservation time, the inner wall between the two layers needs to be copper-plated.
Then the effect of vacuuming first determines whether the water cup can be kept warm for a long time. If the vacuuming time is not enough, and there is still air between the two walls, the cup has a good insulation effect at the beginning. Over time, due to the hot water being filled, the air between the two walls will expand due to heat conduction, which will affect the heat preservation effect of the water cup. This is one of the reasons.
Another reason is that there is a problem with the welding of the water cup itself. There was no vacuum leakage at the beginning of the trial. After a period of use, the welding position was damaged, resulting in vacuum leakage and reducing the insulation performance of the water cup;
Another is the poor sealing of the lid of the water cup, which will affect the heat preservation effect over time. Dongguan Zhanyi Commodity Technology Co., Ltd. produces products in strict accordance with international standards. The entire production process implements a full inspection system, especially before packaging, a comprehensive inspection of the cup vacuum effect is required to ensure that every product entering the market is a good product. We have an advanced production line of stainless steel water cups, with a daily production of 25,000 stainless steel water cups.