高真空多层绝热是一种高效的低温绝热型式。国内以往普遍采用6~10微米(μ)双面喷铝涤纶薄膜作辐射屏,以25微米脱脂无碱玻璃布作间隔物,这种组合材料具有良好的绝热性能,但价格昂贵(见表1)。目前,部分材料(6~10微米涤纶薄膜)还需要进口。显然,这既不符合对于低温绝热材料日益增多的需求量,更不符合“独立自主,自力更生”的原 High-vacuum multi-layer insulation is an efficient low-temperature insulation type. In the past, 6 to 10 micrometers (μ) double-sided aluminum spray polyester film was commonly used as a radiation screen and 25 μm non-alkali non-alkali glass cloth as a spacer. This composite material has good thermal insulation properties but is expensive (see Table 1 ). At present, some materials (6 ~ 10 micron polyester film) also need to be imported. Obviously, this is neither in line with the growing demand for low-temperature insulation materials, but also does not meet the “independent, self-reliance,” the original