Mechanism of the sealing of immobile joints with thermoplastic gaskets
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We describe two methods of theoretical study of sealing of a joint between surfaces with complex geometric shapes. The first method is based on a model of a medium flow through a system of microslits; the second method is based on the model of an intersurface cavity having the form of a porous layer—the model uses the flow equations of filtration theory. A model of the sealing of flat immobile flanges by hot-melt adhesives is proposed. The advantages of this method are considered, and it is shown that application of hot-melt adhesives onto the flat surface of one of the flanges eliminates all possible leakage channels. In addition, the formation of a gasket directly on the surface of a butt joint also makes it possible to markedly simplify the sealing technology. Methods of increasing the durability of joints with polymeric sealants are proposed.
KeywordsContact Pressure Polymer Science Series Porous Layer Butt Joint Leakage Channel
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