Fibers, nonwoven fabrics and absorbent articles comprising a biodegradable polyhydroxyalkanoate comprising 3-hydroxybutyrate and 3-hydroxyhexanoate
AssigneeThe Procter & Gamble Company
InventorIsao Noda
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Abstract
The present invention relates to fibers, and nonwovens comprising said fibers, comprising a biodegradable copolymer, wherein the copolymer comprises at least two randomly repeating monomer units (RRMU) wherein the first RRMU monomer unit has the structure ##STR1## and the second RRMU has the structure ##STR2## wherein at least 50% of the RRMUs have the structure of the first RRMU. The present invention further relates to an absorbent article comprising a liquid pervious topsheet, a biodegradable liquid impervious backsheet comprising the above fibers and/or nonwovens, and an absorbent core positioned between the topsheet and the backsheet.
Claims14
An absorbent article comprising:
- a) a topsheet;
- b) a nonwoven backsheet comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR9## the second monomer unit has the structure ##STR10## and wherein at least 50% of the random repeating monomer units have the structure of the first randomly repeating monomer unit, and wherein said biodegradable copolymer has a melt temperature of from about 30.degree. C. to about 160.degree. C.;
- and
- c) an absorbent core positioned between the topsheet and the backsheet.
An absorbent article comprising:
- a) a topsheet comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR16## the second monomer unit has the structure ##STR17## and wherein at least 50% of the random repeating monomer units have the structure of the first randomly repeating monomer unit, and wherein said biodegradable copolymer has a melt temperature of from about 30.degree. C. to about 160.degree. C.;
- and
- b) a backsheet;
- and
- c) an absorbent core positioned between the topsheet and the backsheet.
An absorbent article comprising:
- a) a topsheet;
- b) a backsheet;
- and
- c) an absorbent core positioned between the topsheet and the backsheet, the absorbent core comprising fibers comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR19## the second monomer unit has the structure ##STR20## and wherein at least 50% of the random repeating monomer units have the structure of the first randomly repeating monomer unit, and wherein said biodegradable copolymer has a melt temperature of from about 30.degree. C. to about 160.degree. C.
Dependencies are inferred from the claim text.