POLYMERIC MATERIALS Russian patent published in 2017 - IPC C08J3/205 B29C47/00 B29C47/36 D01F1/02 

FIELD: chemistry.

SUBSTANCE: method includes: selecting of liquid composition, containing the additive and the carrier; bringing it into contact with the polymeric material; melt processing form the polymeric material. At that the liquid composition is dosed into the polymeric material, when it is melted. The carrier is selected from tri- or tetraethers of pentaerythritol. The ether is produced or can be prepared by pentaerythritol reaction with the carboxylic acid with the carbon chain length C₁₂-C₂₂. Downstream relative to the contact point of the liquid composition and the polymeric material, there is the spinning device for spinning the polymeric material to produce the fiber.

EFFECT: prevention of the carrier decomposition, the pressure drop, the smoke emission in the extrusion die and degradation of the polymeric material properties after the additive introduction, the resulting fiber has increased tensile strength.

17 cl, 1 dwg, 2 tbl, 14 ex