PROCESSING AIDS FOR OLEFINIC CANVAS IN PARTICULAR ELECTRET CANVAS Russian patent published in 2013 - IPC D04H1/42 D04H3/14 D04H3/16 

FIELD: textiles, paper.

SUBSTANCE: method of production of canvas in one version comprises the stages: preparing a mixture comprising a thermoplastic resin and processing aid containing N-substituted amine hindered succinimide oligomer, stirring the mixture in the melt, and the melt viscosity of the mixture of the processing aid and the thermoplastic resin is lower than the melt viscosity of the thermoplastic resin without processing aid and forming the canvas of molten mixture. Also a second version of the method of manufacturing an electret canvas is provided, comprising the stages: preparing a mixture of a thermoplastic resin and processing aid containing N-substituted amine hindered succinimide oligomer, stirring the mixture in the melt, forming the canvas of molten mixture and electrostatic charging of the canvas. The electret filter material comprises microfiber nonwoven canvas comprising a mixture of thermoplastic resin and an additive that promotes charging, containing N-substituted amine hindered succinimide oligomer. This provides processing of polymer olefin materials used in production of products of hot melt extrusion, namely polymer canvas, which include film and non-woven fiber canvas, and also polymer canvas in the form of electret products, especially film for food, air filters, filtering protective masks, respirators and electrostatic elements used in electro-acoustic devices, such as microphones, headphones and electrostatic recording devices.

EFFECT: co-administration of a thermoplastic resin and a processing aid in the form of N-substituted amine hindered succinimide oligomer provides facilitation of canvas forming.

25 cl, 4 tbl, 26 ex