公开(公告)号：US20170131444A1

公开(公告)日：2017-05-11

申请号：US15308853

申请日：2015-04-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Ying XIA ,  Shri NIWAS ,  Michael A. MCCOY ,  Yongshang LU

IPC: G02B5/128 ,  B32B37/12 ,  A41D13/01 ,  G02B1/04 ,  A41D27/08

Abstract: Retroreflective articles include a layer of optical elements, and a bead bond layer (140). The optical elements include transparent microspheres (110), a transparent polymeric polyurethane layer (120), and at least one reflective layer (130), where the transparent polymeric polyurethane layer (120) comprises a dried layer prepared from an aqueous polyurethane dispersion. The retroreflective articles have improved wash durability.