US 11,732,161 B2
Masking film for protecting sensitive substrates
Gregory K. Jones, Richmond, VA (US); Bankim Bhupendra Desai, Chesterfield, VA (US); Carl Douglas Ray, Chesterfield, VA (US); Sukwoo Park, Richmond, VA (US); and Kevin A. Brady, Cary, IL (US)
Assigned to TREDEGAR SURFACE PROTECTION, LLC, N. Chesterfiel, VA (US)
Filed by TREDEGAR SURFACE PROTECTION, LLC, Richmond, VA (US)
Filed on Dec. 13, 2019, as Appl. No. 16/713,339.
Claims priority of provisional application 62/781,253, filed on Dec. 18, 2018.
Prior Publication US 2020/0190371 A1, Jun. 18, 2020
Int. Cl. C09J 7/40 (2018.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); C09J 7/38 (2018.01); C09J 7/24 (2018.01); C09J 7/20 (2018.01); B32B 7/06 (2019.01)
CPC C09J 7/401 (2018.01) [B32B 7/06 (2013.01); B32B 27/08 (2013.01); B32B 27/302 (2013.01); B32B 27/32 (2013.01); C09J 7/201 (2018.01); C09J 7/243 (2018.01); C09J 7/383 (2018.01); C09J 7/387 (2018.01); B32B 2250/246 (2013.01); B32B 2405/00 (2013.01); C09J 2203/31 (2013.01); C09J 2301/414 (2020.08); C09J 2423/04 (2013.01); C09J 2423/045 (2013.01); C09J 2423/046 (2013.01); C09J 2453/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A masking film comprising:
an adhesion layer comprising a blend of hydrogenated styrene block copolymer and low density polyethylene, the adhesion layer having an outer adhesion surface configured to contact a substrate, the outer adhesion surface having an average surface roughness Ra of between 100 nm and 350 nm, and an average spacing between peaks Sm of between 20 μm and 150 μm as measured by a profilometer in accordance with ANSI/ASME Test Method B46.1-1985; and
a release layer on a side of the adhesion layer opposite the outer adhesion surface.