The Gas Tightness Study of Aerostat Envelope Material
The gas tightness of envelope material is one of the important technicalities of aerostat products.In order to study the gas tightness of materials after processing,three materials with bearing layer made of Vectran,nylon and polyimide fabric were chosen as the research objects,and processing parameters here was consistent with the actual working conditions.The helium permeability of materials that were original,after being used and the joint position were tested.The variation of helium permeability was further analyzed.The research results show that the helium permeability of envelope material increases with the increase of kneading times and the area of sealing gap.Besides,the helium permeability of the gap containing the external hot strip is equivalent to that of the bulk material.This study could guide the choice of materials,the product processing and the assessment of overall leakage.
万方数据
维普
