Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A highly oriented, undrawn, conductive, composite filament which is a sheath-core composite filament comprising a sheath of a fiber-forming thermoplastic polymer (A) and a core of a composition (B) comprising a conductive material which comprises a conductive metal oxide(s) and a thermoplastic polyamide, having a critical elongation of at least 5% and a shrinkage in hot water at 100°C of not higher than 20%, said core having a core resistance at a D.C. voltage of 1 kV of less than 9 x 10¹⁰Ω/cm·filament; wherein the critical elongation means an elongation reached in the course of extending a composite filament at which the core resistance exceeds 1 x 10¹¹Ω/cm·filament at a D.C. voltage of 1 kV.
Claim 2
Dependent Claim
115 words
A highly oriented, undrawn, conductive, composite filament which is a sheath-core composite filament comprising a sheath of a fiber-forming thermoplastic polymer (A) and a core of a composition (B) comprising a conductive material which comprises a conductive metal oxide(s) and a thermoplastic polyamide, having a critical elongation of at least 5% and a shrinkage in hot water at 100°C of not higher than 20%, said core having a core resistance at a D.C. voltage of 1 kV of less than 9 x 10¹⁰Ω/cm·filament; wherein the critical elongation means an elongation reached in the course of extending a composite filament at which the core resistance exceeds 1 x 10¹¹Ω/cm·filament at a D.C. voltage of 1 kV.
Claim 3
Dependent Claim
95 words
The highly oriented, undrawn, conductive, composite filament of Claim 1, wherein said conducive material is a particulate conductive material (W₁) having an average particle diameter of 0.01 to 0.3µ comprising titanium dioxide or barium sulfate coated on the surface thereof with a metal oxide (D) selected from stannic oxide and zinc oxide containing antimonium oxide (C), the ratios by weight of said antimonium oxide (C) and said metal oxide (D) to said particulate conductive material (W₁) satisfying the following formulae (1) and (2) C/W₁ = 0.01 to 0.10 (1) D/W₁ = 0.05 to 0.20 (2).
Claim 4
Dependent Claim
28 words
The highly oriented, undrawn, conductive, composite filament of Claim 1, wherein said conducive material is incorporated in said polyamide in an amount of 60 to 75% by weight.
Claim 5
Dependent Claim
38 words
The highly oriented, undrawn, conductive, composite filament of Claim 1, wherein the ratio by weight of said fiber-forming thermoplastic polymer (A) and said composition (B) comprising a conductive material and a polyamide is: (B)/(A) = 8/92 to 22/78.
Claim 6
Dependent Claim
122 words
A process for producing a highly oriented, undrawn, conductive, composite filament which is a sheath-core composite filament comprising a sheath component of a fiber-forming thermoplastic polymer (A) and a core component of a composition (B) comprising a conductive material which comprises a conductive metal oxide(s) and a thermoplastic polyamide, which comprises extruding said fiber-forming thermoplastic polymer (A) having an intrinsic viscosity, [η], of at least 0.55 and said composition (B) having a moisture content adjusted by drying to 100 to 1,200 ppm separately through different extruders, and conducting high orientation melt spinning using a composite spinning apparatus at at least 2,500 m/min so that the filaments thus spun will have a shrinkage in hot water of 100°C of not more than 20%.
Claim 7
Dependent Claim
122 words
A process for producing a highly oriented, undrawn, conductive, composite filament which is a sheath-core composite filament comprising a sheath component of a fiber-forming thermoplastic polymer (A) and a core component of a composition (B) comprising a conductive material which comprises a conductive metal oxide(s) and a thermoplastic polyamide, which comprises extruding said fiber-forming thermoplastic polymer (A) having an intrinsic viscosity, [η], of at least 0.55 and said composition (B) having a moisture content adjusted by drying to 100 to 1,200 ppm separately through different extruders, and conducting high orientation melt spinning using a composite spinning apparatus at at least 2,500 m/min so that the filaments thus spun will have a shrinkage in hot water of 100°C of not more than 20%.