Resin composition and film formed from said resin composition

1. A resin composition comprising

a polyamide resin (A) and

a polyvinyl alcohol-based resin (B), which includes 2-10% by mole of a structural unit represented by formula (1) and has a degree of saponification of 70-89% by mole

wherein R 1 , R 2 , and R 3 each independently represents a hydrogen atom or an alkyl group having 1-4 carbon atoms, X represents a single bond, and R 4 , R 5 , and R 6 each independently represents a hydrogen atom or an organic group; and

wherein the weight ratio (A/B) of the polyamide resin (A) to the polyvinyl alcohol-based resin (B) is from 90/10 to 51/49.

2. The resin composition according to claim 1 , wherein the content of the structural unit represented by formula (1) in the polyvinyl alcohol-based resin (B) is 4-8% by mole.

3. The resin composition according to claim 1 , wherein the structural unit represented by formula (1) is the structural unit represented by formula (1′)

4. The resin composition according to claim 1 , wherein the polyamide resin (A) has a melting point of 150-240° C.

5. The resin composition according to claim 1 , which gives a film that has a water vapor transmission rate of 900-1,500 g/m 2 ·24 hr·30 μm.

6. A film which is formed from the resin composition according to claim 1 .