Vacuum insulation panel is a new type of super insulation material, which achieves extremely low thermal conductivity and good insulation effect. Due to the unique characteristics of vacuum inside the vacuum insulation panel, its thermal conductivity can be as low as one-tenth of that of traditional thermal insulation materials. Its raw materials are all inorganic materials, and it is a non-combustible and safe thermal insulation material. Due to the above advantages of vacuum insulation panels, the application prospects are very wide, and they are currently widely used in household appliances, storage and transportation, construction and other fields. However, the vacuum insulation panel products on the market have a wide variety of manufacturing processes, the product quality is uneven, and there are difficulties in effective thermal conductivity, life evaluation, etc., there is no unified test method and index, resulting in difficulties in product acceptance and promotion, and limitations. development of this product. Therefore, the national standard GB/T 37608-2019 "Vacuum Insulation Panel" has been successfully completed and released in 2019, and will be implemented on May 1, 2020.
The vacuum insulation panel is a plate-like material for building thermal insulation made by the composite gas barrier film as the external wrapping material, and the core material and the getter as the filling material inside. Its products can effectively avoid air convection, radiation and heat conduction, and the low thermal conductivity can reach below 0.002w/m.k; it does not contain any ODS (Ozone Depleting Substances) materials. The fire rating is A1. The national standard GB/T 37608-2019 "Vacuum Insulation Panel" mainly includes scope, terms and definitions, classification and marking, technical requirements, test methods, etc. The main scope of application of the standard is the vacuum insulation panels used in the construction and industrial fields for a long time at -40℃~70℃. The standard puts forward key terms such as thermal conductivity in the central area, effective thermal conductivity and service life, and presents the key concepts of vacuum insulation panels to users and manufacturers in a true and objective manner. The standard provides a detailed description of the classification and marking of products. The information included in the marking description includes: 1) application; 2) type of thermal conductivity in the central area; 3) core material; 4) gas barrier membrane bag; 5) size, length × Width×thickness; 6) Other marks, such as commercial code, etc.; and give an example expression. With marking instructions and examples, we can clearly understand the relevant information of the product.
The standard specifies the appearance of the vacuum insulation panel. For example, except for the getter or desiccant area, the surface of the vacuum insulation panel should be flat, without bulging, scratches and damages that affect the use. Dimensional length, width, thickness tolerances (above table), warpage and diagonal differences and many other physical properties (below table) are also specified. These physical properties mainly include: thermal conductivity in the central area, puncture strength; thermal conductivity after puncture; damp heat aging performance, etc.
The standard also specifies the tensile strength, dimensional stability, combustion performance, etc. of vacuum insulation panels. The concept of effective thermal conductivity and service life is put forward, and the scientific method of testing is given, so as to provide a reliable means for objectively evaluating the performance of vacuum insulation panels. The implementation of this standard fills the blank of the national standard for domestic vacuum insulation panels, regulates the vacuum insulation panel market, and promotes the healthy development of my country’s vacuum insulation panel industry. Jishang vacuum insulation panels have the characteristics of good thermal insulation effect, high protection performance, high space utilization, long service life, light unit weight, etc. All products meet the scope of national standards.
