Patent ID: 8227658

Claim:
An absorbent article comprising a generally liquid-impermeable, vapor-permeable layer, the layer comprising a microporous film that includes a biodegradable polymer blend, the biodegradable polymer blend containing from about 15 wt. % to about 85 wt. % of a first aliphatic-aromatic copolyester and from about 15 wt. % to about 85 wt. % of a second aliphatic-aromatic copolyester, wherein the first aliphatic-aromatic copolyester is formed from a first aromatic monomer that includes terephthalic acid or a derivative thereof and the second aliphatic-aromatic copolyester is formed from a second aromatic monomer that includes phthalic acid or a derivative thereof, isophthalic acid or a derivative thereof, or a combination of the foregoing, wherein the glass transition temperature of the first aliphatic-aromatic copolyester and the second aliphatic-aromatic copolyester is about 0° C. or less, and wherein the film exhibits a water vapor transmission rate of from about 800 to about 10,000 grams/m 2 -24 hours wherein the first aliphatic-aromatic copolyester is polybutylene adipate terephthalate, and wherein the second aliphatic-aromatic copolyester is polyethylene adipate isophthalate or polybutylene adipate isophthalate.