Hideyuki Nakamura, Settu, Japan; Yukihiko Fujita, Settu, Japan; and Ayako Kita, Settu, Japan.
Assigned to Zuiko Corporation, Settu, Japan.

Filed: 12/17/18
Issued: 9/24/24

A method for producing an elastic composite sheet, comprising: a first step of stretching a strip-shaped or string-shaped elastic member in a longitudinal direction of the elastic member, the elastic member comprising a thermoplastic elastic resin; a second step of placing the stretched elastic member over a first base material sheet in a manner that a main surface of the first base material sheet comes into contact with the elastic member; and a third step of, with the stretched elastic member placed over the first base material sheet, bonding the elastic member to a first location of the first base material sheet, the first location overlapping the elastic member and located away from edges of the elastic member as viewed in a direction perpendicular to the main surface of the first base material sheet, wherein the first step further comprises disposing a plurality of the elastic members spaced from each other and stretching each said elastic member of the plurality of elastic members in the longitudinal direction, and in the third step the stretched elastic members are placed over the first base material sheet, bonding the stretched elastic members to the first base material sheet at the first location overlapping the stretched elastic members in a manner so the edges of the stretched elastic members are not bonded to the first base material sheet, and the bonding is ultrasonic bonding.