Poly-3-hydroxyalkanoate resin composition and molded article
A poly-3-hydroxyalkanoate resin composition having excellent ductility and transparency, and a molded article thereof. The poly-3-hydroxyalkanoate resin composition includes: a poly-3-hydroxyalkanoate resin (A); and an ethylene-vinyl acetate copolymer resin (B) having a vinyl acetate content of 65 to 95 wt %, wherein the resin (A) and the resin (B) are miscible and a ratio of resin (A)/resin (B) is 90/10 to 55/45 (wt/wt). The molded article is produced using such a poly-3-hydroxyalkanoate resin composition.
1. A resin composition, comprising:
a poly-3-hydroxyalkanoate resin (A); and
an ethylene-vinyl acetate copolymer resin (B) having a vinyl acetate content of 70 to 90 wt %,
wherein:
the poly-3-hydroxyalkanoate resin (A) and the ethylene-vinyl acetate copolymer resin (B) are miscible, and a weight ratio of the poly-3-hydroxyalkanoate resin (A) with respect to the ethylene-vinyl acetate copolymer resin (B) is from 85/15 to 70/30 in wt/wt; and
the ethylene-vinyl acetate copolymer resin (B) has a melt flow rate of from 5 to 8 g/10 min.
2. The resin composition according to claim 1 , wherein the poly-3-hydroxyalkanoate resin (A) has a 3-hydroxybutyrate content of 80 mol % or more.
3. A molded article, comprising:
the resin composition according to claim 1 .
4. A molded article, comprising:
the resin composition according to claim 2 .
5. The resin composition according to claim 1 , wherein the poly-3-hydroxyalkanoate resin (A) has a 3-hydroxybutyrate content of 85 mol % or more.
6. The resin composition according to claim 1 , wherein the poly-3-hydroxyalkanoate resin (A) comprises at least one selected from the group consisting of a poly(3-hydroxybutyrate) homopolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxypropionate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyheptanoate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyoctanoate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxynanoate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxydecanoate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyundecanoate) copolymer resin, and a poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymer resin.
7. A resin composition, comprising:
a poly-3-hydroxyalkanoate resin (A); and
an ethylene-vinyl acetate copolymer resin (B) having a vinyl acetate content of 65 to 95 wt %,
wherein:
the poly-3-hydroxyalkanoate resin (A) and the ethylene-vinyl acetate copolymer resin (B) are miscible, and a weight ratio of the poly-3-hydroxyalkanoate resin (A) with respect to the ethylene-vinyl acetate copolymer resin (B) is from 90/10 to 55/45 in wt/wt; and
the poly-3-hydroxyalkanoate resin (A) comprises at least one selected from the group consisting of a poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer resin, and a poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymer resin.
8. The resin composition according to claim 7 , wherein the weight ratio of the poly-3-hydroxyalkanoate resin (A) with respect to the ethylene-vinyl acetate copolymer resin (B) is from 90/10 to 70/30.
9. The resin composition according to claim 7 , wherein the weight ratio of the poly-3-hydroxyalkanoate resin (A) with respect to the ethylene-vinyl acetate copolymer resin (B) is from 85/15 to 70/30.
10. The resin composition according to claim 7 , wherein the vinyl acetate content in the ethylene-vinyl acetate copolymer resin (B) is from 70 to 90 wt %.
11. The resin composition according to claim 7 , wherein the poly-3-hydroxyalkanoate resin (A) has a 3-hydroxybutyrate content of 80 mol % or more.
12. The resin composition according to claim 7 , wherein the poly-3-hydroxyalkanoate resin (A) has a 3-hydroxybutyrate content of 85 mol % or more.
13. The resin composition according to claim 7 , wherein the vinyl acetate content in the ethylene-vinyl acetate copolymer resin (B) is from 70 to 90 wt %.
14. The resin composition according to claim 7 , wherein the ethylene-vinyl acetate copolymer resin (B) has a melt flow rate of from 0.1 to 1000 g/10 min.
15. The resin composition according to claim 14 , wherein the melt flow rate is from 0.5 to 500 g/10 min.
16. The resin composition according to claim 14 , wherein the melt flow rate is from 1 to 100 g/10 min.
17. The resin composition according to claim 14 , wherein the melt flow rate is from 5 to 60 g/10 min.
18. The resin composition according to claim 14 , wherein the melt flow rate is from 5 to 8 g/10 min.
19. The resin composition according to claim 18 , wherein the vinyl acetate content in the ethylene-vinyl acetate copolymer resin (B) is from 70 to 90 wt %.
20. A molded article, comprising:
the resin composition according to claim 7 .