How to improve the insulation effect of the pop-up lid thermos

How to improve the insulation effect of the pop-up lid thermos
In today’s highly competitive international market, as an indispensable item in people’s daily life, the market demand for thermos continues to grow. For international wholesale buyers, it is very important to choose a pop-up lid thermos with excellent insulation performance. This article will explore the insulation principle of the pop-up lid thermos in depth, and elaborate on a variety of methods to improve its insulation effect, aiming to help buyers provide customers with better products.

1. The insulation principle of the pop-up lid thermos
The pop-up lid thermos mainly achieves insulation in the following ways:
(I) Vacuum insulation layer
A vacuum layer is formed between the inner liner and the outer shell of the thermos. Since there are very few gas molecules in the vacuum environment, the heat loss caused by air convection and conduction is greatly reduced. This is the core principle of the thermos insulation.
(II) Liner material and surface treatment
High-quality liner materials such as 304 stainless steel or 316 stainless steel have good thermal conductivity and corrosion resistance. Copper or silver plating on the surface of the inner liner can effectively reflect heat radiation and reduce heat loss in the form of radiation.
(III) Sealing design of the cup lid
The pop-up lid adopts a special sealing structure, such as a silicone sealing ring, which can fit tightly to the cup mouth when the pop-up lid is closed, preventing air from flowing in and heat from dissipating, thereby maintaining a stable temperature inside the cup.

2. Material selection to improve the insulation effect of the pop-up lid thermos
(I) Optimization of the inner liner material
Application of 316 stainless steel
Compared with the common 304 stainless steel, 316 stainless steel has added molybdenum to make it more corrosion-resistant, especially when facing liquids containing chlorides, such as seawater and certain beverages, which can effectively prevent the inner liner from being corroded, extend the service life of the thermos, and better maintain its insulation performance.
The inner liner of this material can also maintain good gloss and thermal conductivity after long-term use, which is conducive to heat reflection and preservation.
High-purity copper or silver plating
Copper and silver have extremely high thermal conductivity. When a high-purity copper layer or silver layer is plated on the surface of the inner liner, the heat in the inner liner can be more effectively reflected back to the liquid in the cup, reducing the heat radiation loss outward.
For example, some high-end thermos brands use multi-layer silver plating technology to significantly improve the insulation effect, and can maintain good insulation performance even in extreme temperature environments.
(II) Improvement of shell material
Aviation-grade aluminum alloy shell
Aviation-grade aluminum alloy has the advantages of light weight, high strength and low thermal conductivity. Using it to make the outer shell of the thermos cup can effectively block the external heat from being conducted into the cup while ensuring the overall structural stability of the thermos cup.
The low thermal conductivity makes it difficult for the outer shell of the thermos cup to be affected by the external temperature and change the temperature when it is used in a high or low temperature environment, thereby indirectly improving the insulation effect.
Innovative application of environmentally friendly plastic shell
The new environmentally friendly plastic has good thermal insulation and impact resistance. In the design of some outdoor sports pop-up cover thermos cups with extremely high weight requirements, this plastic shell can provide a certain degree of thermal insulation protection without adding too much weight, reducing the impact of external temperature on the liquid in the cup.
(III) Sealing material upgrade
Food-grade silicone seal ring
Choose a high-quality food-grade silicone seal ring, which has good elasticity and temperature resistance. A tighter seal is formed between the pop-up cover and the cup mouth, which can effectively prevent air from entering the cup and reduce heat loss caused by air convection.
Even when the pop-up cover is repeatedly opened and closed, it can still maintain good sealing performance to ensure a continuous and stable insulation effect.
Rubber-plastic composite sealing material
This composite sealing material combines the elasticity of rubber and the shape stability of plastic. On the contact surface between the cup cover and the cup mouth, the rubber part fits tightly, and the plastic part plays a supporting and positioning role, further enhancing the sealing effect and improving the insulation performance.

3. Optimize the structural design of the pop-up lid thermos to improve the insulation effect
(I) Increase the thickness of the vacuum layer
Principles and advantages
Appropriately increasing the thickness of the vacuum layer can further reduce the loss of heat through conduction and convection. Because a thicker vacuum layer means that the distance of heat transfer increases, under the same temperature difference conditions, the rate of heat loss will slow down, thereby extending the insulation time.
Design considerations
However, increasing the thickness of the vacuum layer will also increase the overall weight and cost of the thermos. Therefore, when designing, it is necessary to comprehensively consider factors such as insulation effect, portability and production cost, and determine the optimal range of vacuum layer thickness through experiments and simulation calculations.
(II) Improve the shape of the liner
Conical liner design
The liner is designed to be conical, so that the space at the bottom of the liner is relatively small, which can reduce the area of ​​heat conduction from the bottom of the liner to the outside. At the same time, when the liquid is full, the conical liner can make the liquid more concentrated, and the heat is not easy to diffuse to the vicinity of the liner wall, which is conducive to maintaining the temperature of the liquid.
Wave-shaped inner wall
The inner wall adopts a wave-shaped design, which can increase the surface area of ​​the inner wall, thereby improving the inner wall’s ability to reflect and store heat. When heat radiation encounters the wave-shaped wall, it will be reflected and refracted multiple times, increasing the residence time of heat in the inner liner and reducing heat loss.
(III) Optimize the connection structure between the cup lid and the cup mouth
Threaded sealing connection
The threaded sealing connection method is adopted. Compared with the simple press-type sealing, the threaded connection can provide a tighter fit. By rotating the cup lid to make the threads tightly bite, multiple sealing lines are formed between the cup lid and the cup mouth, effectively preventing the exchange of air and heat.
Magnetic sealing connection
Magnetic materials are installed on the cup lid and the cup mouth respectively. When the cup lid is closed, the magnetic force will tightly adsorb the cup lid on the cup mouth to enhance the sealing. This structure is not only convenient to use, but also ensures that the cup lid remains well sealed when subjected to a certain external force impact, thereby improving the insulation effect.

4. Methods to improve the thermal insulation effect based on advanced technology
(I) Laser welding technology
Precise welding of the liner and the vacuum layer
Laser welding technology can be used to achieve precise welding of the liner and the vacuum layer, and the welding point is firm and has good sealing. Compared with traditional welding methods, laser welding has a small heat-affected zone and will not have a significant impact on the material properties around the welding, thereby ensuring the quality of the liner and the vacuum layer and improving the overall thermal insulation performance of the thermos cup.
Welding quality detection and control
Equipped with an advanced laser welding quality detection system, it can monitor the parameters in the welding process in real time, such as laser energy, welding speed, etc., and adjust them in time to ensure the stability of the welding quality. Through strict control of welding quality, heat leakage caused by welding defects can be effectively prevented and the insulation time can be extended.
(II) Plasma treatment technology
Surface modification of the liner
Using plasma to treat the surface of the liner can change the microstructure and chemical composition of the surface of the liner. The treated surface of the liner can better reflect thermal radiation, while improving the flatness and smoothness of the surface and reducing the loss of heat on the surface of the liner.
Enhance coating adhesion
Before copper plating, silver plating and other coating treatments, use plasma to treat the surface of the inner liner to enhance the adhesion between the coating and the inner liner. Make the coating more evenly and firmly adhere to the surface of the inner liner, and improve the thermal insulation effect and durability of the coating.
(III) Nano thermal insulation coating technology
Application of nano aerogel coating
Nano aerogel is a material with extremely high thermal insulation performance. It is made into a coating and coated on the inner liner or outer shell of the thermos cup to effectively block heat conduction. The porosity of the nano aerogel coating is extremely high, and air molecules are difficult to flow in this porous structure, thereby greatly reducing the heat loss through conduction and convection.
Research and development of nano composite thermal insulation coating
Develop nano composite thermal insulation coatings, and use nano thermal insulation materials in combination with other thermal insulation materials, such as nano silicon dioxide and ceramic powder. This composite coating not only has good thermal insulation performance, but also has certain wear resistance and corrosion resistance, which can improve the overall performance and service life of the thermos cup.

5. Guarantee of thermal insulation effect by quality inspection and standard certification
(I) Thermal insulation performance inspection standard
International standard reference
Refer to international standards such as ISO 9754 for the inspection methods and requirements of thermal insulation performance of thermal insulation containers. This standard specifies the steps and indicators for thermal insulation performance testing of thermal insulation containers under specific environmental conditions, such as temperature and humidity. For example, at an ambient temperature of 20°C, pour hot water of a certain temperature into a thermos cup, and measure the drop in water temperature after a certain period of time to evaluate the thermal insulation effect of the thermos cup.
National standard compliance
Different countries and regions also have their own national standards, such as China’s GB/T 26656-2011 “Stainless Steel Vacuum Insulation Container” standard, which clearly stipulates the thermal insulation performance, appearance quality, safety performance, etc. of thermos cups. Thermos cup manufacturers need to strictly follow these national standards to ensure that product quality meets market access requirements.
(II) Establishment of quality control system
Raw material inspection
Establish a strict raw material inspection system to conduct quality inspections on stainless steel, plastics, sealing materials, etc. used in the production of thermos cups. Ensure that the quality of raw materials meets the standard requirements and ensure the thermal insulation performance of the thermos cup from the source. For example, test the composition, thickness and other indicators of stainless steel, as well as the heat resistance, toxicity and other properties of plastics.
Production process monitoring
During the production process of the thermos cup, each process is monitored in real time, such as liner molding, welding, assembly, etc. By setting quality control points, random inspections or full inspections are carried out on products in each link, and quality problems in the production process are promptly discovered and corrected to prevent the decline of thermal insulation effect due to quality fluctuations in the production links.
(III) Third-party testing and certification
Cooperation with professional testing institutions
Cooperate with professional third-party testing institutions to conduct comprehensive testing and evaluation of the thermal insulation performance of the pop-up lid thermos cup. These professional institutions usually have advanced testing equipment and professional testing personnel, and can conduct testing in accordance with strict standards and specifications and issue authoritative test reports.
Acquisition and application of certification marks
After passing third-party testing and certification, thermos cup products can obtain corresponding certification marks, such as CE certification, FDA certification, etc. These certification marks are not only a symbol of product quality, but also an important pass for products to enter the international market. In the international wholesale market, thermos cups with certification marks are more likely to gain the trust of buyers and consumers, which is conducive to product sales and market promotion.

In summary, improving the insulation effect of the pop-up lid thermos cup requires multiple aspects such as material selection, structural design, advanced process application, and quality inspection and certification. For international wholesale buyers, when choosing a pop-up lid thermos cup supplier, they should focus on its technical strength and product quality control capabilities in the above aspects, so as to provide customers with pop-up lid thermos cup products with excellent insulation performance and reliable quality, and occupy an advantageous position in the fierce international market competition.