US 12,067,903 B2
Method for manufacturing food indicator
Grace Kim, Suwon-si (KR); Do Wan Kim, Suwon-si (KR); Kyoung Sik Cho, Suwon-si (KR); and Seok Jun Hong, Suwon-si (KR)
Assigned to CJ CHEILJEDANG CORPORATION, Seoul (KR)
Appl. No. 17/788,575
Filed by CJ CHEILJEDANG CORPORATION, Seoul (KR)
PCT Filed Dec. 24, 2020, PCT No. PCT/KR2020/019089
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2021/133098, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 10-2019-0173831 (KR), filed on Dec. 24, 2019.
Prior Publication US 2023/0043581 A1, Feb. 9, 2023
Int. Cl. G01N 33/12 (2006.01); B32B 7/06 (2019.01); B32B 7/12 (2006.01); B32B 27/36 (2006.01); B32B 37/12 (2006.01); B65D 65/38 (2006.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); G01N 21/78 (2006.01); G01N 31/22 (2006.01); G09F 3/00 (2006.01); G09F 3/10 (2006.01); G09F 3/02 (2006.01)
CPC G09F 3/0291 (2013.01) [B32B 7/06 (2013.01); B32B 7/12 (2013.01); B32B 27/36 (2013.01); B32B 37/12 (2013.01); C09J 7/255 (2018.01); C09J 7/38 (2018.01); G01N 31/221 (2013.01); G09F 3/10 (2013.01); B32B 2250/02 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2307/4023 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/724 (2013.01); B32B 2307/7242 (2013.01); B32B 2439/70 (2013.01); B32B 2519/00 (2013.01); B32B 2553/00 (2013.01); G09F 2003/021 (2013.01); G09F 2003/0225 (2013.01); G09F 2003/023 (2013.01); G09F 2003/0257 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for manufacturing an indicator for food, the method comprising:
bonding a first film, on which an indicator layer comprising a pH-sensitive indicator is formed on one surface thereof,
and a second film, on which an adhesive layer is formed on one surface thereof, so that the indicator layer of the first film and the adhesive layer of the second film face each other,
wherein the indicator layer further comprises a white ink layer on one surface facing the adhesive layer, and
in the bonding of the first film and the second film, the first film and the second film are bonded so that the white ink layer and the adhesive layer are brought into contact.