Why does the thinner the wall thickness of the thermos cup

Starting in 2017, lightweight cups began to appear in the water cup market, and soon after, ultra-light measuring cups began to appear in the market. What is a lightweight cup? What is an ultra-light measuring cup?

Taking a 500 ml stainless steel thermos cup as an example, the approximate net weight produced according to traditional processes is between 220g and 240g. When the structure remains the same and the lid is the same, the weight of the lightweight cup is between 170g and 150g. The weight of the lightweight cup will be between 100g-120g.

How are lightweight and ultra-light measuring cups made?

At present, the processes adopted by various companies are basically the same, that is, the cup body that has a normal weight according to the traditional process is processed again through the thinning process. Depending on the product structure, different thinning thicknesses can be achieved. After removing the material that is rotary cut within the scope allowed by the process, the existing cup body will naturally become lighter.

Well, we have made another popularization of lightweight cups in the past. At present, we are answering the question of why the thinner the wall thickness of the thermos cup, the better the insulation effect. Many previous articles have mentioned the process of thermal insulation of thermos cups. So since thermal insulation is achieved through vacuum process, how does it have anything to do with the thickness of the cup wall? When the same production process is used and the technical parameters of vacuuming are exactly the same, the wall thickness of the thermos cup will conduct heat faster, and the thicker wall material will have a larger heat-absorbing contact volume, so the heat dissipation will be faster. The heat-absorbing contact volume of the thin-walled thermos cup will be relatively small, so the heat dissipation will be slower.

But this question is relative. It cannot be said that a thermos cup with a thin wall must be very insulating. The quality of the insulation effect depends more on the quality of the production technology and the standards of production process management. At the same time, not all water cups are suitable for spin-thinning process. There are also products with larger capacity such as 1.5-liter thermos bottles. Even if their structure can meet the production of spin-thinning process, it is not recommended to use spin-thin technology. Spin-thin technology is not recommended. Thinning the wall thickness also needs to be within a reasonable range.

If the wall thickness is too thin, the tensile force it can withstand is lower than the suction force generated by vacuuming, and the slight result will be deformation of the cup wall. In serious cases, the inner wall and outer wall will hit each other, so that the heat preservation effect will not be achieved. The suction force generated by a large-capacity thermos cup or thermos cup after being evacuated is greater than that of a small-capacity water cup. The wall of a small-capacity water cup that can achieve stability after being thinned will deform on a large-capacity kettle.