METHOD AND A DEVICE FOR REGULATION OF PLASTIC MATERIALS VISCOSITY Russian patent published in 2005 - IPC

FIELD: chemical industry; methods and devices for regulation of viscosity of plastic materials.

SUBSTANCE: the invention is pertaining to the field of molding of polymers, in particular, to the new efficient device and the method of regulation of viscosity of different polymeric materials using a shifting thinning and-or untwisting. The device for decreasing viscosity of polymeric melt by means of the melted material shift vibratory pulling through with formation, at least, of a shifting deformation, contains: a loading gear, an inlet and outlet of the technological cavity, the technological cavity formed by the first and the second surfaces separated from each other with formation between them of a technological cavitary spacing, and an engine for movement at least of one of the surfaces in respect to another. One of the surfaces is made with a capability of motion relative to another with formation of a shifting deformation of the melt of the polymer, and at least on one of surfaces there is a ribbed construction having a contour for movement of the melted material on it and is made with a capability of a local speeding-up of stretching and braking of the melted material simultaneously with a periodical change of the shifting speed of the melted material deformation. The invention provides for a method of production of a polymeric material by means of its shifting vibration, at which the process of untwisting of the melt is realized by a means of shifting vibrations at a fatigue deformation of stretching just up to the given level of untwisted state of the untwisted condition of macromolecules of the polymer. Then adjust the temperature of the polymer crystallization due to dynamic action of the speed of cooling of the beginning of the crystallization, with removal of barriers for such a transformation and conduct the polymer after-treatment till its hardening. The invention ensures decrease of viscosity pf the extruded material, what favorably affects the further operations of the polymeric material casting.

EFFECT: the invention ensures decrease of the polymeric extruded material viscosity, what favorably affects on the further operations of the polymeric material casting.

57 cl, 32 dwg