| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polylactic acid-based polymer sheet material having slipperiness suitable for a process for producing a film, etc., while taking a secondary processability of film, etc., into consideration. SOLUTION: This polylactic acid-based polymer sheet material has a relation of Tg<Tm2<Tm1 where the glass transition temperature and the melting point of the polylactic acid-based polymer are Tg( deg.C) and Tm1( deg.C), respectively and the melting point of an antiblocking agent is Tm2( deg.C) and is obtained by heat-treating a sheet material comprising a resin composition prepared by compounding 100 pts.wt. of the polylactic acid-based polymer with 0.01-0.3 pt.wt. of the antiblocking agent, at a temperature ranging from (Tm2-30) deg.C to Tm1 deg.C.
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