PURPOSE: To provide a polyethylene filament having specific molecular weight, O/C atomic ratio, tensile strength, initial modulus, dynamic visco-elastic characteristics and small angle X-ray scattering characteristics, useful as a light-weight reinforcing material for polar polymeric matrix material and exhibiting high adhesive strength.
CONSTITUTION: The objective polyethylene filament has a weight-average molecular weight of ≥1,000,000; ratio of the number of oxygen atom to carbon atom of 0.05W0.20 on the filament surface (determined by ESCA); a single filament tensile strength of ≥40g/d; a single filament initial modulus of ≥1,200g/d; the height of γ-dispersion peak of tanδ of ≤0.017 and a dynamic viscoelastic modulus E' of ≥600g/d (at 100°C) determined by dynamic viscoelastic measurement; and is free from long-period structure by small-angle X-ray scattering. The filament can be produced by extruding a hot solution through a nozzle, introducing the extrudate into a spinning bath composed of an upper coolant layer and a lower coagulant layer thereby coagulating the filament after gelation, drawing the coagulated filament and passing through a low-temperature plasma.
MITSUYOSHI TAKEHIKO
OKAMOTO HIDEHIRO
| JPS60146078A | 1985-08-01 | |||
| JPS585228A | 1983-01-12 | |||
| JPS6075606A | 1985-04-30 | |||
| JPS57207854A | 1982-12-20 |