US 11,655,118 B2
Film roll and film bundle
Kaya Tokuda, Otsu (JP); Masahiro Yamashita, Otsu (JP); Tetsuo Okuyama, Otsu (JP); Toshiyuki Tsuchiya, Otsu (JP); Naoki Watanabe, Otsu (JP); and Shunsuke Ichimura, Otsu (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 16/631,957
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Jul. 13, 2018, PCT No. PCT/JP2018/026478
§ 371(c)(1), (2) Date Jan. 17, 2020,
PCT Pub. No. WO2019/017287, PCT Pub. Date Jan. 24, 2019.
Claims priority of application No. JP2017-140914 (JP), filed on Jul. 20, 2017.
Prior Publication US 2020/0180888 A1, Jun. 11, 2020
Int. Cl. B65H 18/28 (2006.01); C09J 7/40 (2018.01); B32B 7/06 (2019.01)
CPC B65H 18/28 (2013.01) [C09J 7/403 (2018.01); B32B 7/06 (2013.01); B32B 2307/538 (2013.01); C09J 2423/005 (2013.01); C09J 2463/00 (2013.01); C09J 2467/005 (2013.01); C09J 2467/006 (2013.01); C09J 2479/086 (2013.01); C09J 2483/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A film roll comprising:
a first polymer film having a reactive compound layer on at least one surface and
a second polymer film having a rough surface with a surface roughness Ra of 0.1 μm or more and 5 μm or less on at least one side, the second polymer film having a modulus of elasticity of 300 MPa or more and 10 GPa or less,
wherein
the first polymer film and the second polymer film are co-wound in a state that the surface having the reactive compound layer of the first polymer film and the rough surface of the second film contact each other, and
a reactive compound forming the reactive compound layer is a silane coupling agent, an epoxy resin, a multifunctional acrylate, or a combination thereof.