Fabrication process for molecular sieve bag

Abstract

The invention discloses a fabrication process for a molecular sieve bag. The fabrication process comprises the following steps of batching, molding, high sintering, vacuum activating, inner packagingand outer packaging. According to the molecular sieve bag fabricated adopting the fabrication process, a sealing bag will isolate air when the molecular sieve bag is not in use, a molecular sieve cannot absorb gases, and the adsorption property of the molecular sieve is guaranteed; the sealing bag needs to be torn and stripped when the molecular sieve bag is used, then the molecular sieve with a packaging bag is placed into an interlayer directly, when the sealing bag is torn, because of protection of the packaging bag, the molecular sieve will not be exposed to the air directly, so that the adsorption property of the molecular sieve is guaranteed; and meanwhile, because of the low air release rate and the high air permeability characteristics of the packaging bag, the excess gases will not be generated to destroy vacuum in use under the vacuum environment, and the effect of adsorbing impurity gases under the vacuum also will not be reduced because of isolation of the packaging bag.

Description

technical field [0001] The invention relates to the field of vacuum cryogenic heat insulation containers, in particular to a manufacturing process of a molecular sieve bag used for absorbing impurity gas in a high vacuum environment so as to maintain vacuum. Background technique [0002] Vacuum cryogenic insulation containers generally have a double-layer structure, the inner layer stores low-temperature medium, the outer layer is in contact with the environment, and the interlayer space between the inner and outer layers is the insulation layer for the vacuum environment. The container must achieve super insulation performance and maintain the vacuum in the interlayer space Environment matters. [0003] Molecular sieve is a solid with a porous structure, which can quickly adsorb various gas molecules smaller than its internal pore size, and is used to adsorb gas in a high vacuum environment to maintain a vacuum. [0004] At present, the manufacturing process of molecular s...

AI Technical Summary

Problems solved by technology

However, molecular sieves with incomplete desorption will outgas more than inhale in a vacuum environment, resulting in failure to maintain a high vacuum environment, and even accelerate the destruction of the high vacuum environment.