Abstract:
PROBLEM TO BE SOLVED: To provide a readily producible annular metal cord and endless metal belt having excellent breaking strength. SOLUTION: The annular cord has an annular core part 3 and an outer layer part 4. The annular core part 3 is formed by bonding both ends of a first strand material 1 prepared by laying six first metal wires 5. The outer layer part 4 is formed by helically winding a second strand material 2 obtained by laying six second metal wires 6 six turns around the annular core part 3. The second strand material 2 is wound at a prescribed winding angle relatively to the central axis of the annular core part 3. The winding starting end part is bonded to the winding terminal end part. Since six second strand materials 2 are not wound but the second strand material 2 is wound six turns, only one second strand material 2 is sufficient and the number of the binding site is one. As a result, the breaking strength of the annular metal cord can be increased and production can be facilitated. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a bulletproof/protective clothes comprising a high strength polyethylene fiber having comparable or larger strength and elastic modulus than those of conventional high strength polyethylene, excellent in resistance to fatigue from flexing and abrasion resistance, hardly fibrillated and having high surface hardness. SOLUTION: The bulletproof/protective clothes comprises a high strength polyethylene fiber having recurring units of substantially ethylene, ≥5 intrinsic viscosity and ≥22 cN/dtex average strength, wherein the measurement of the fiber by differential scanning calorimetry (DSC) exhibits a temperature-increasing DSC curve having at least one endothermic peak at a temperature range of 140°C to 148°C. (on the low temperature side) and at least one endothermic peak at a temperature range of ≥148°C (on the high temperature side) or the number of frictions until the fiber being broken in an abrasion test according to method B for measuring abrasion resistance in the Testing Methods for Spun Yarn (JIS L 1095) is 100,000 or larger. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide ropes comprising a high strength polyethylene fiber having comparable or larger strength and elastic modulus than those of conventional high strength polyethylene, excellent in resistance to fatigue from flexing and abrasion resistance, hardly fibrillated and having high surface hardness. SOLUTION: The ropes comprises a high strength polyethylene fiber having recurring units of substantially ethylene, ≥5 intrinsic viscosity and ≥22 cN/dtex average strength, wherein the measurement of the fiber by differential scanning calorimetry (DSC) exhibits a temperature-increasing DCS curve having at least one endothermic peak over a temperature region of 140°C to 148°C. (on the low temperature side) and at least one endothermic peak over a temperature region of ≥148°C (on the high temperature side) or the number of frictions until the fiber is broken in an abrasion test according to method B for measuring abrasion resistance in the Testing Methods for Spun Yarn (JIS L 1095) is 100,000 or larger. COPYRIGHT: (C)2005,JPO&NCIPI