公开(公告)号：US20230320440A1

公开(公告)日：2023-10-12

申请号：US18041888

申请日：2021-08-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Hui Juan Chen ,  Thomas J. Xue ,  You San Qian ,  Xujun Yu ,  Zhigang Yu

IPC: A41D13/11 ,  B26D7/34 ,  B26D3/10

CPC classification number: A41D13/1138 ,  B26D7/34 ,  B26D3/10

Abstract: The present invention relates to a sealing strip, a respirator, and a method for manufacturing a sealing strip. The sealing strip includes a main body part, the main body part having an upper surface, a lower surface, a first side surface, and a second side surface opposite to the first side surface. The main body part includes a curved surface part. The curved surface part includes a first convex part and a second convex part, and the first convex part and the second convex part are connected to each other in the lengthwise direction of the sealing strip to define a concave part located therebetween. The concave part is configured to accommodate the nose of a wearer. The first convex part and the second convex part are symmetrical about the concave part. A first side surface of the curved surface part is a sinusoidal curved surface with a constant amplitude extending in the lengthwise direction of the sealing strip. By the sealing strip, the respirator and the method for manufacturing a sealing strip according to the present invention, a manufacturing process of the sealing strip can be simplified; a maximum utilization rate of materials can be achieved; sealing between the respirator and the face of the wearer can be improved, and the wearing comfort of the respirator can be increased.