Composition for hot melt adhesive

2:

• The composition for hot melt adhesive according to claim 1, wherein the poly(3-hydroxyalkanoate)-based resin (A) is a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer.

3:

• The composition for hot melt adhesive according to claim 2, wherein an average content ratio of a 3-hydroxyhexanoate unit in the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer is from 3 mol % to 25 mol %.

4:

• The composition for hot melt adhesive according to claim 1, wherein the composition has a melt viscosity of 2,900 Pa·s or less, the melt viscosity being measured at a shear rate of 1.2×102s−1 and a temperature of 150° C.

5:

• The composition for hot melt adhesive according to claim 1, wherein the poly(3-hydroxyalkanoate)-based resin (A) has a weight-average molecular weight of from 100,000 to 1,000,000.

6:

• The composition for hot melt adhesive according to claim 1, wherein the polycaprolactone (B) has a weight-average molecular weight of from 20,000 to 250,000.

7:

• The composition for hot melt adhesive according to claim 1, wherein the polycaprolactone (B) comprises at least two polycaprolactones having different weight-average molecular weights from each other.

8:

• The composition for hot melt adhesive according to claim 1, wherein a weight ratio of the poly(3-hydroxyalkanoate)-based resin (A)/the polycaprolactone (B) is from 95/5 to 5/95.

9:

• The composition for hot melt adhesive according to claim 1, further comprising a glycerol fatty acid ester (C).

10:

• The composition for hot melt adhesive according to claim 9, wherein the glycerol fatty acid ester (C) is glycerol diacetomonolaurate.

11:

• The composition for hot melt adhesive according to claim 9, wherein a content of the glycerol fatty acid ester (C) is 50 parts by weight or less with respect to a total of 100 parts by weight of the poly(3-hydroxyalkanoate)-based resin (A) and the polycaprolactone (B).

13:

• The composition for hot melt adhesive according to claim 1, wherein a weight ratio of the poly(3-hydroxyalkanoate)-based resin (A)/the polycaprolactone (B) is from 90/10 to 10/90.

14:

• The composition for hot melt adhesive according to claim 1, wherein a weight ratio of the poly(3-hydroxyalkanoate)-based resin (A)/the polycaprolactone (B) is from 80/20 to 20/80

15:

• The composition for hot melt adhesive according to claim 9, wherein a content of the glycerol fatty acid ester (C) is from 0.1 to 50 parts by weight with respect to a total of 100 parts by weight of the poly(3-hydroxyalkanoate)-based resin (A) and the polycaprolactone (B).

16:

• The composition for hot melt adhesive according to claim 1, wherein the poly(3-hydroxyalkanoate)-based resin (A) has a weight-average molecular weight of from 150,000 to 800,000.

17:

• The composition for hot melt adhesive according to claim 1, wherein the polycaprolactone (B) has a weight-average molecular weight of from 20,000 to 250,000.

18:

• The composition for hot melt adhesive according to claim 9, wherein the glycerol fatty acid ester (C) is at least one selected from the group consisting of glycerol diacetomonolaurate, glycerol diacetomonooleate, glycerol diacetomonostearate, glycerol diacetomonocaprylate, and glycerol diacetomonodecanoate.

19:

• The composition for hot melt adhesive according to claim 1, wherein the composition further comprises at least one other resin selected from the group consisting of an aliphatic polyester-based resins and an aliphatic aromatic polyester-based resin.

20:

• The composition for hot melt adhesive according to claim 19, wherein a content of the at least one other resin is from 1 part by weight to 30 parts by weight, based on to the total of 100 parts by weight of the poly(3-hydroxyalkanoate)-based resin (A) and the polycaprolactone (B).