Why can a newly purchased stainless steel thermos only keep heat for 3 months?

Do some of you feel the same way when you see this title? As summer turns to autumn, the weather will gradually become cooler with the passage of time. http://www.zhanyict.com/en/ProductsDetail-VB-10422.htmlAt this time, many friends want to buy a favorite thermos cup to satisfy their desire to drink hot water at any time in the severe cold, but some friends have encountered the situation that the thermos cup they bought can only be used for three months and no longer keeps warm, so they are a little confused about how to choose a thermos cup with stable heat preservation performance and good heat preservation effect after a long time of use. Today, the editor will share with you how to choose a thermos cup with excellent heat preservation effect and durability.

Before sharing, let me first tell you why stainless steel water cups can be used as thermos cups or how thermos cups are produced? The thermos cup uses a double-layer stainless steel structure. http://www.zhanyict.com/en/ProductsDetail-VB-10422.htmlIt is baked in a vacuum furnace at a temperature of 600°C for 6 hours to expand the air in the interlayer and discharge it through the small holes at the bottom of the cup. When vacuuming, a glass bead for sealing is placed on the small hole at the bottom. The glass bead will gradually melt at high temperature and seal the small hole. In this process, the getter welded at the bottom of the interlayer is affected by the high temperature to produce a chemical reaction, which causes the air to be completely discharged. The double-layer stainless steel water cup that completes these processes has the function of heat preservation.

However, thermos cups that have only completed these processes cannot leave the factory. The water cups also need to undergo polishing, spraying, assembly and other processes. At the same time, batch sampling inspections must also be completed, and qualified products can be sold to the market. http://www.zhanyict.com/en/ProductsDetail-VB-10422.htmlSo why can the newly purchased thermos cup only keep warm for 3 months? How long is the service life of a thermos cup usually?

The reasons for the 3-month insulation of the water cup are divided into two aspects. On the one hand, it is caused by the manufacturer's production management, and on the etiquette side, it is caused by improper use by consumers. http://www.zhanyict.com/en/ProductsDetail-VB-10422.htmlBefore sharing this content, the editor will first answer that if the service life of a stainless steel thermos cup is set as the stability of the thermos cup's performance, a qualified stainless steel thermos cup should still be insulated for at least 2 years if used properly. The insulation durability of a high-quality thermos cup is about 2-4 years, which is 24 months to 48 months.

The reasons why manufacturers cause the stainless steel thermos to have a short service life are:

1. The operation is not standard, and the process time is shortened. For example, it needs to be baked in a vacuum furnace at high temperature for 6 hours, but it is only done for 4 hours or even shorter, which artificially reduces energy consumption, reduces costs, and improves production efficiency. http://www.zhanyict.com/en/ProductsDetail-VB-10422.htmlSuch a water cup has a good insulation effect when it is first used, but because the air inside is not completely removed, it is used for a long time with hot water. The temperature of the hot water will cause the air inside to expand repeatedly, and the insulation performance will drop sharply after a period of time.

2. Quality management is not standardized. Many factories produce stainless steel thermos cups that have passed the vacuum test and are then put into storage before being shipped out. Due to the different storage times in the warehouse and the limited storage conditions, no quality inspection is performed when the cups are shipped out. http://www.zhanyict.com/en/ProductsDetail-VB-10422.htmlThis results in some cups that are not completely vacuumed entering the market. Although vacuum tests are performed when they are put into storage, some defective cups have tiny sand holes that are invisible to the naked eye. As the storage time increases, the interior gradually becomes incompletely vacuumed.

3. Transportation problems. The handling and shaking during transportation can also cause collision and extrusion of the stainless steel thermos cup. Similarly, some water cups that cannot withstand such external forces will be deformed and damaged.

The above are the main reasons for the short insulation time of stainless steel thermos cups caused by poor production management by water cup manufacturers. Of course, there are some other reasons, but the impact of other reasons is very small, so I will not list them one by one. http://www.zhanyict.com/en/ProductsDetail-VB-10422.htmlToday I will share here first, and tomorrow I will continue to share another part, the reasons why improper use by consumers causes the insulation time of stainless steel thermos cups to be shortened.