Most micro-nano insulating materials mainly use three external sealing materials: plastic film, glass fiber cloth, and aluminum foil. The purpose of the sealing is to provide convenience for installation and operation. Although the usage temperature of the sealing materials is lower than the maximum usage temperature of the micro-nano core materials, the sealing materials will melt and evaporate at high temperatures or form a molten ceramic layer on the surface of the core materials, which does not affect the overall performance of the micro-nano insulation materials. In most applications, micro-nano insulating materials may also be encapsulated or combined with other materials to form a static inner lining insulation environment. 
Regarding the classification of micro-nano insulating materials: 
According to the different usage temperatures, micro-nano heat insulation materials are mainly divided into three temperature grades: 1000 type, 1100 type and 1200 type. According to the product form, they can be classified into various specifications of products such as molded plates, direct pressure plates, flexible plates, flexible blankets, combined pipe shells, flexible felts, high-strength sheets, special-shaped parts, vacuum plates, etc. 
1) Micro-nano hard insulation board: 
The micro-nano rigid plates (Type I) are mainly supplied in two forms. The first type is commonly referred to as a molded block or molded plate, which is a square-cornered plate-shaped insulation material formed under high pressure in a mold cavity. The compression density is typically 250-400 Kg/m³, and the production thickness ranges from 6mm to 50mm. For ease of use and to reduce damage, micro-porous molded plates are generally encapsulated with plastic film, glass fiber, or aluminum foil. 
The second type, known as the direct-pressure plate, is a flat-shaped insulating material that is completely encapsulated by a woven fabric under high temperature. It is designed to reduce dust and facilitate installation operations, with a density typically ranging from 220 to 300 kg/m. The direct-pressure plate has excellent compressive strength, but it is usually not suitable for bending due to its tendency to rupture or fracture. The production thickness of micro-nano direct-pressure plates varies from 3mm to 50mm, depending on the specific type. 
2) Micro-nano flexible heat insulation panel: 
The production density of micro-nano flexible plates is approximately 150-250 Kg/m³. Just like the direct-pressed plates, they are also fully encapsulated with high-temperature woven fabric, and often have high-temperature threads segmented sewn in one or two directions. The lower density design and the segmented partition sewing enable the micro-nano flexible plates to produce a kind of moderately curved effect like a louver, which can adapt to cylindrical or curved surface usage scenarios. The production thickness range of micro-nano flexible plates is usually between 3 and 20 mm. 
3) Micro-nano Flexible Insulation Blanket: 
The production density of the micro-nano flexible blanket is approximately 200-240 Kg/m³. It is also made by overall encapsulation using high-temperature weaving. In both directions, high-temperature threads are used for grid stitching. Due to the low density and the grid partitioned overlock sewing process, the micro-nano flexible blanket also has moderate bending characteristics, enabling it to meet the requirements of pipeline or curved surface installation. The production thickness range of the micro-nano flexible blanket is typically 5-10 mm. 
4) Micro-nano assembled tube shell: 
The micro-nano spliced tube shell can be assembled into a cylindrical hollow tube. During the manufacturing process, it is usually divided into two parts along the circumferential length direction or into multiple curved segments. The density design of the insulation tube shell for the pipeline is approximately 240-300 Kg/m³. The standard specification length is mostly 500mm, and the standard thickness is generally 25mm. For most pipeline sizes, thicker tube shell designs can be provided. The micro-nano tube shell is encapsulated with glass fiber or other high-temperature woven fabric to facilitate installation operations. 
The micro-nano tubes can also be combined with micro-nano flexible plates to meet specific thickness requirements. 
In addition, micro-nano thermal insulation materials also include high-strength thermal insulation sheets, special-shaped thermal insulation components, vacuum insulated panels and other products of different specifications and forms. Among them, the vacuum insulated panel (Nasheng Insulation Panel) adopts vacuum encapsulation technology, and its thermal conductivity can be further reduced to 0.005W/m.K, which is suitable for extremely demanding cold chain transportation insulation scenarios.