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.

公开(公告)号：US20230321467A1

公开(公告)日：2023-10-12

申请号：US18041895

申请日：2021-08-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: A62B18/08 ,  B32B27/06 ,  B32B27/20 ,  B32B27/08

CPC classification number: A62B18/08 ,  B32B27/065 ,  B32B27/205 ,  B32B27/08 ,  B32B2266/0214 ,  B32B2250/03 ,  B32B2305/022 ,  B32B2305/026 ,  B32B2307/7242 ,  B32B2571/00

Abstract: The present invention relates to a sealing foam, a respirator, and a method for manufacturing a sealing foam. The sealing foam includes: a main body part, the main body part being a porous foam; an air-proof film on a continuous surface; and an anchor layer, the anchor layer being continuously provided on the upper layer of the main body and provided between the air-proof film and the main body part, and the anchor layer being partially embedded in pores of the porous foam. The respirator includes a respirator main body and a sealing foam of the present invention. The method for manufacturing a sealing foam includes: providing a porous foam to prepare a main body part of a sealing foam, and providing an anchor layer and an air-proof film on the porous foam, so that the air-proof film is continuously provided on an upper surface of the main body part, wherein the anchor layer is provided between the air-proof film and the main body part, and is partially embedded in pores of the porous foam. The sealing foam, the respirator, and the method for manufacturing a sealing foam according to the present invention are convenient for subsequent cutting, can simplify the manufacturing process of the sealing foam, improve the sealing between the respirator and the face of a wearer, and improve the wearing comfort of the respirator.