Patent ID: 11898031
Assignee: ECOVANCE CO. LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. The biodegradable polyester resin composition according to claim 1, wherein a hydrolysis degree after one week is 35% to 60%, and
a hydrolysis degree after three weeks is 85% or more,
wherein the hydrolysis degree after one week and the hydrolysis degree after three weeks are measured by a measurement method below:
wherein in the measurement method,
the hydrolysis degree after one week is a number average molecular weight reduction rate, compared to an initial number average molecular weight of the biodegradable polyester film, of the biodegradable polyester film placed for one week under high-temperature and high-humidity conditions of 80° C. and a relative humidity of 100%, and
the hydrolysis degree after three weeks is a number average molecular weight reduction rate, compared to an initial number average molecular weight of the biodegradable polyester film, of the biodegradable polyester film placed for three weeks under high-temperature and high-humidity conditions of 80° C. and a relative humidity of 100%.