| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a wiper blade by integral molding and the wiper blade obtained by the manufacturing method and satisfying desired characteristics such as wiping-off performance, restraint of generation of a chattering sound and durability. SOLUTION: This wiper blade is an integral mold of body and reinforcing materials composed of a thermoplastic elastomer composition, and is set not more than 1×10-3 in a curving factor K determined by an expression (i) when substantially regarding the wiper blade as a two-layer structure of a body layer and a reinforcing material layer when (1) deflection when applying a concentrated load of 50 g to one end of the wiper blade having the length of 200 mm is 20 to 80 mm, (2) Young's moduli of the body material and the reinforcing material are respectively E1 and E2 and a difference in a shrinkage factor between the respective layer materials isδr. The integral molding is desirably performed by co-extrusion.
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