BIODEGRADABLE ALIPHATIC POLYESTER DRAWN YARN AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To stably provide a biodegradable aliphatic polyester drawn yarn having high strength and high toughness.

SOLUTION: (A) A biodegradable aliphatic polyester drawn yarn has a molecular weight retention of 75% or more with respect to a biodegradable aliphatic polyester resin raw material; (B) the biodegradable aliphatic polyester drawn yarn is formed by drawing a biodegradable aliphatic polyester undrawn yarn whose extension rate λssatisfies the condition represented by the following formula (i): 1.0≤λs≤2.0 (i); (C) the draw ratio relative to the undrawn yarn λrelsatisfies the condition represented by the following formula (ii): 3.3≤λrel(ii); (D) the network draw ratio λnetsatisfies the condition represented by the following formula (iii): 3.5≤λnet≤20.0 (iii); and (E) the tensile strength (unit: cN/dtex) and the tensile elongation (unit: %) satisfy the condition represented by the following formula (iv): (tensile strength)×(tensile elongation)(1/2)≥30 (iv).

COPYRIGHT: (C)2013,JPO&INPIT