METHOD OF PRODUCING ORIENTED POLYMER STRIPS Russian patent published in 2011 - IPC B29C55/06 

FIELD: process engineering.

SUBSTANCE: invention relates to production of oriented polymer strips and their use in production of reinforced tubes. Proposed method satisfied the requirement (V₂-V₁)/L>0,22 s^-1. Elongation is performed at temperature approximating to fusion point by, at least, three independent-drive drawing rolls. Axes of rotation of said rolls are perpendicular to polymer film translation. Rolls revolve in one direction at different tangential speeds V_1, V₂ and V₃. Third drawing roll revolves at speed V₃ exceeding that of second roll V₂.

EFFECT: hardened structural integrity, higher drawing speeds, ruling out of film slippage.

7 cl, 1 dwg