POLYETHYLENE YARN AND METHOD OF ITS PULLING (VERSIONS) Russian patent published in 2010 - IPC D01F6/04 D01D5/12 

FIELD: machine building.

SUBSTANCE: method for pulling complex gel-formed yarn consists in forming source complex gel-formed yarn out of polyethylene with specified viscosity in deca-hydro-naphthalene at 135°C from approximately 5 dcl/g to 35 dcl/g with less, than approximately two throwing groups per thousand atoms of carbon and less, than approximately 2 wt % of other components. Further source yarn is run at velocity V₁ m/min through a hot chamber with forced convection; notably, one or more zones with temperature from 130° C to 160°C are located on the path of yarn. Then source yarn is continuously run through the hot chamber and outside it with velocity V₂ m/min at output whereat the following equations 1-4 are followed: 0.25 ≤ L/V₁ ≤ 20, min equation 1; 3 ≤ V₂/V₁ ≤ 20 equation 2; 1.7 ≤ (V₂-V₁)/L ≤ 60, min^-1 equation 3; 0.20 ≤ 2L/(V₁+V₂) ≤ 10, min equation 4.

EFFECT: facilitating production of yarn with high order of molecular micro-structures and items out of yarn with exceptional capability to protection from damage effect of gun.

44 cl, 12 dwg, 4 tbl, 17 ex