公开(公告)号：US20230374736A1

公开(公告)日：2023-11-23

申请号：US17983399

申请日：2022-11-09

Applicant: KOREA RAILROAD RESEARCH INSTITUTE

Inventor： Dae Sang Kim ,  Ungjin Kim

IPC: E01B3/36 ,  B32B25/10 ,  B32B5/02 ,  B32B3/08 ,  B32B25/14 ,  B32B37/20 ,  B32B7/12 ,  B32B37/12 ,  B32B38/00 ,  E01B19/00

CPC classification number: E01B3/36 ,  B32B25/10 ,  B32B5/022 ,  B32B3/08 ,  B32B25/14 ,  B32B37/203 ,  B32B7/12 ,  B32B37/12 ,  B32B38/0004 ,  E01B19/003 ,  B32B2260/021 ,  B32B2260/044 ,  B32B2305/20 ,  B32B2319/00 ,  B32B2250/40 ,  B32B2250/03 ,  E01B2204/01

Abstract: The present disclosure provides, as a sleeper pad for railroad sleepers in which a nonwoven fabric is attached to a rubber pad by a thermal fusion process, a nonwoven fabric-integrated sleeper pad using a rubber pad embedded with a stiffener and methods of manufacturing and constructing the same, which can adjust vertical support stiffness of the rubber pad by the stiffener embedded in the middle of the rubber pad and which can secure the flatness of the rubber pad by resisting bending deformation due to a difference in shrinkage between rubber and nonwoven fabric.