Invention Grant
- Patent Title: Polyvinyl alcohol resin film, method for discriminating polyvinyl alcohol resin film, and method for manufacturing polyvinyl alcohol resin film
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Application No.: US17868862Application Date: 2022-07-20
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Publication No.: US12054606B2Publication Date: 2024-08-06
- Inventor: Osamu Kazeto , Yasutaka Inubushi
- Applicant: KURARAY CO., LTD.
- Applicant Address: JP Kurashiki
- Assignee: KURARAY CO., LTD.
- Current Assignee: KURARAY CO., LTD.
- Current Assignee Address: JP Kurashiki
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP 20173926 2020.10.15
- Main IPC: C08L29/04
- IPC: C08L29/04 ; C08F10/06 ; C08F216/06 ; C08J5/18 ; C08F116/06
Abstract:
A method for discriminating a polyvinyl alcohol resin film containing a polyvinyl alcohol resin in which all or a part of carbon is derived from bio-derived ethylene from a polyvinyl alcohol resin film containing only a polyvinyl alcohol resin derived only from fossil fuel-derived ethylene by measuring an abundance ratio 14C/C of carbon 14 (14C) in total carbon.
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