What is the international standard for the insulation time of stainless steel thermos cups?

Stainless steel water cups are a common heat preservation container, but due to the large number of products on the market, the heat preservation time varies. This article will introduce the international standards for the insulation time of stainless steel water bottles and discuss the factors that affect the insulation time.

As a common thermal insulation container, stainless steel water cups are favored by consumers. However, different brands and models of stainless steel water bottles have differences in the length of time they can be kept warm, which brings some trouble to consumers in choosing the right product. In order to ensure product quality and provide accurate reference indicators, the International Standards Organization has formulated standards for the insulation time of stainless steel water bottles.

According to international standards, the heat preservation time of stainless steel water bottles should meet the following requirements:

1. Hot beverage insulation standards: For stainless steel water cups loaded with hot beverages, the insulation time should be more than 6 hours. This means that after 6 hours after being filled with hot drink, the temperature of the liquid in the water cup should still be higher than or close to the standard setting temperature.

2. Cold drink insulation standards: For stainless steel water cups loaded with cold drinks, the insulation time should be more than 12 hours. This means that after 12 hours after being filled with cold drink, the temperature of the liquid in the water cup should still be lower than or close to the standard setting temperature.

It should be noted that international standards do not stipulate specific temperature values, but set time requirements based on common drink needs. Therefore, specific insulation lengths may vary depending on factors such as product design, material quality and environmental conditions.

The factors that affect the heat preservation time of stainless steel water bottles mainly include:

1. Cup structure: The double-layer or three-layer structure of the water cup can provide better heat preservation effect, reduce heat conduction and radiation, thereby extending the heat preservation time.

2. Sealing performance of the cup lid: The sealing performance of the cup lid directly affects the heat preservation effect. Good sealing performance can prevent heat loss or cold air from entering, ensuring longer heat preservation time.

3. External ambient temperature: The external ambient temperature has a certain impact on the heat preservation time of the water cup. In extremely cold or hot environments, insulation may be slightly less effective.

4. Liquid starting temperature: The starting temperature of the liquid in the water cup will also affect the holding time. Higher temperature liquids will have a more significant temperature drop within a certain period of time.

In short, international standards stipulate the heat preservation time requirements of stainless steel water cups, providing reference indicators for consumers. However, the actual heat preservation time is also affected by many factors, including cup body structure, cup lid sealing performance, external ambient temperature and liquid starting temperature. When purchasing stainless steel water cups, consumers should consider these aspects comprehensively and purchase stainless steel thermos cups based on their needs for heat preservation time.