US 12,168,340 B2
Formable films, laminate structures, and related methods
Ashok Chaturvedi, New Delhi (IN); Steven Sargeant, Elizabethtown, KY (US); Sudhir Naik, Noida (IN); Sanjeev Gupta, Noida (IN); Dipak Boral, Noida (IN); and Pramod Sirsamkar, Noida (IN)
Assigned to Flex Films (USA), Inc., Elizabethtown, KY (US)
Appl. No. 17/614,855
Filed by Flex Films (USA), Inc., Elizabethtown, KY (US)
PCT Filed May 26, 2020, PCT No. PCT/IN2020/050469
§ 371(c)(1), (2) Date Nov. 29, 2021,
PCT Pub. No. WO2020/240584, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 201911021324 (IN), filed on May 29, 2019.
Prior Publication US 2022/0234803 A1, Jul. 28, 2022
Int. Cl. B32B 27/36 (2006.01); B32B 15/09 (2006.01); B32B 15/20 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01)
CPC B32B 27/36 (2013.01) [B32B 15/09 (2013.01); B32B 15/20 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 2250/03 (2013.01); B32B 2255/06 (2013.01); B32B 2264/102 (2013.01); B32B 2307/31 (2013.01); B32B 2307/518 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A laminate structure comprising:
a multilayer film comprising:
a first formable layer comprising biaxially-oriented PET having a metaphase evidenced by a metaphase transition at about 180° C. to about 200° C. as measured by differential scanning calorimetry (DSC) upon a first heating; and
a sealing layer comprising a copolyester material, the sealing layer overlying the first formable layer and having an outer surface opposite the first formable layer, the sealing layer having a crystallinity from 10% to 20% as measured by differential scanning calorimetry (DSC);
a core structure comprising a first PET layer, a second PET layer, and a silica-containing PET layer interposed between the first PET layer and the second PET layer, wherein at least one layer of the core structure has a metaphase transition at about 180° C. to about 200° C. as measured by differential scanning calorimetry (DSC) upon a first heating and has a molded volume of greater than or equal to about 200%; and
an intermediate layer comprising a soft metal foil interposed between the multilayer film and the core structure.