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AssigneeToyo Boseki Kabushiki Kaisha
InventorsGodo Sakamoto, Syoji Oda, Hiroki Murase
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A filament having excellent incision resistance includes as a primary component a polyethylene filament having a weight-average molecular weight of 300,000 or less and a ratio of a weight-average molecular weight to a number-average molecular weight (Mw/Mn) of 4.0 or less as determined in the state of a filament as well as a modulus of 500 cN/dtex or more. This filament is useful to produce a fabric excellent in incision resistance, a fibrous material for reinforcing mortar or concrete, and a rope, each of which comprises the filament. The filament can be produced by drawing a non-drawn polyolefin filament which comprises a polyethylene having a weight-average molecular weight of 60,000-600,000, a ratio of a weight-average molecular weight to a number-average molecular weight (Mw/Mn) of 4.5 or less, and a rate of birefringence (Δn) of 0.008 or more, at a temperature not higher than the α-relaxation temperature of the non-drawn filament.
1-5. (canceled)
A fibrous material for reinforcing cement mortar or concrete, comprising as a primary component a polyethylene filament with a tensile strength of 15 cN/dtex or more and a tensile modulus of 500 cN/dtex or more which comprises a polyethylene having a weight-average molecular weight of 300,000 or less and a ratio of a weight-average molecular weight to a number-average molecular weight (Mw/Mn) of 4.0 or less as determined in a filamentary state.
A rope comprising a polyethylene filament with a tensile strength of 15 cN/dtex or more and a tensile modulus of 500 cN/dtex or more which comprises a polyethylene having a weight-average molecular weight of 300,000 or less and a ratio of a weight-average molecular weight to a number-average molecular weight (Mw/Mn) of 4.0 or less as determined in a filamentary state.
A process for producing a high strength polyolefin filament, comprising drawing a non-drawn polyolefin filament which comprises a polyethylene having a weight-average molecular weight of 60,000-600,000, a ratio of a weight-average molecular weight to a number-average molecular weight (Mw/Mn) of 4.5 or less, and a rate of birefringence (Δn) of 0.008 or more at a temperature not higher than an α-relaxation temperature of said non-drawn filament.
Dependencies are inferred from the claim text.