HIGHLY ANTICORROSIVE METALLIC PIGMENTS Russian patent published in 2007 - IPC B29C53/56 B29L23/00 B29K101/12 

FIELD: chemical industry; mechanical engineering; shipbuilding industry; other industries; methods of production of the hermetic thin-walled glass-fiber pipes and pipelines.

SUBSTANCE: the invention is pertaining to the field of mechanical engineering, chemical industry and may be used in the engineering designs of the ship cryostats, the gaseous and cryogenic pipelines. The method of manufacture of the hermetic thin-walled glass-fiber pipes out of the prepreg provides for the prepreg coiling on the metallic mandrel, the prepreg heating, the thermal treatment of the prepreg-coiled glass-fiber pipe. The method also includes the preliminary heating of the metallic mandrel to the temperature ensuring the elastic state of the binding. The share of the binding is taken in the ratio of 38-42 %. Then conduct the prepreg coiling, and in the course of the coiling exercise arming-up through the whole depth of each coiled layer of the prepreg by means of the preheated mandrel at the technological stretching ensuring forcing the binder through each coiled layer of the fiber glass fabric, owing to what the air removal from the intercoil space of the glass-fiber fabric. Then after the coiling of the glass fiber pipe up to the preset depth the surplus of the binding squeezed out on the pipe surface is rolled out by means of the cold molding roller on all over the surface of the pipe creating the resin film. After that the glass-fiber pipe is subjected to the thermal treatment with rotation of the mandrel, and the ready glass-fiber pipe take out from the mandrel. The method ensures production of the hermetic glass-fiber pipes at the expense of the complete removal of the air from the prepreg glass-fiber fabric and filling this space up with the binder in the process of the pipe molding.

EFFECT: the invention ensures production of the hermetic glass-fiber pipes at the expense of the complete removal of the air from the prepreg glass-fiber fabric and filling this space up with the binder in the process of the pipe molding.