US 12,312,511 B2
Mask film and method for manufacturing polarizing plate by using same
Byung Sun Lee, Daejeon (KR); Jaehong Park, Daejeon (KR); Kyun Il Rah, Daejeon (KR); and Du Jin Choi, Daejeon (KR)
Assigned to Shanjin Optoelectronics (Suzhou) Co., LTD., (CN)
Appl. No. 17/259,487
Filed by Shanjin Optoelectronics (Suzhou) Co., Ltd., Jiangsu (CN)
PCT Filed Aug. 22, 2019, PCT No. PCT/KR2019/010695
§ 371(c)(1), (2) Date Jan. 11, 2021,
PCT Pub. No. WO2020/040568, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 10-2018-0097778 (KR), filed on Aug. 22, 2018.
Prior Publication US 2021/0292604 A1, Sep. 23, 2021
Int. Cl. C09J 133/08 (2006.01); B32B 37/26 (2006.01); B32B 38/10 (2006.01); B32B 38/14 (2006.01); C09J 7/25 (2018.01); C09J 7/40 (2018.01); G02B 1/04 (2006.01); G02B 1/14 (2015.01); G02B 5/30 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01); G02F 1/1335 (2006.01)
CPC C09J 7/255 (2018.01) [B32B 37/26 (2013.01); B32B 38/10 (2013.01); B32B 38/14 (2013.01); C09J 7/401 (2018.01); C09J 133/08 (2013.01); G02B 1/04 (2013.01); G02B 1/14 (2015.01); G02B 5/305 (2013.01); B32B 27/306 (2013.01); B32B 27/36 (2013.01); B32B 2307/20 (2013.01); B32B 2307/402 (2013.01); B32B 2551/00 (2013.01); C09J 2301/18 (2020.08); C09J 2467/005 (2013.01); G02F 1/133528 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A mask film comprising:
a protective film;
an adhesive layer disposed on one surface of the protective film; and
a perforated portion integrally passing through the protective film and the adhesive layer,
wherein the adhesive layer comprises an adhesive including two different types of acryl-based copolymer resins,
wherein the adhesive layer comprises a first acryl-based copolymer resin, a second acryl-based copolymer resin and a crosslinking agent,
wherein the first acryl-based copolymer resin comprises alkyl (meth)acrylate, hydroxyalkyl (meth)acrylate and (meth)acrylic acid,
wherein the second acryl-based copolymer resin comprises alkyl (meth)acrylate, hydroxyalkyl (meth)acrylate, (meth)acrylic acid and polyalkyl (meth)acrylate,
wherein a content of the first acryl-based copolymer resin is 6 parts by weight to 12 parts by weight, based on 1 part by weight of the second acryl-based copolymer resin,
wherein a thickness (a) of the protective film and a thickness (b) of the adhesive layer have a ratio (a/b) of 1 to 30;
wherein a modulus (c) of the protective film and a modulus (d) of the adhesive of the adhesive layer have a ratio (c/d) of 200 to 17,000, and
wherein the perforated portion of the mask film has an edge roughness of 30 μm or less.