Patent ID: 11918036
Assignee: R.J. REYNOLDS TOBACCO COMPANY
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 12:
13. A filter material configured for use as part of a smoking article, comprising:
a plurality of bi-component fibers assembled as fibrous filter tow, each fiber including a core comprising a first degradable polymer material including polylactic acid or a polyhydroxyalkanoate and a sheath comprising a second polymer material including at least one of a cellulose ester and a plasticizer;
wherein the core comprises a higher melt temperature than the sheath;
wherein the fibrous filter tow comprises particles of starch and/or particles of cellulose; and
where the second polymer material further comprises a degradable material selected from the group consisting of polyhydroxypropionate, polyhydroxyvalaerate, polyhydroxybutyrate, polyhydroxyoctanoate, polylactic acid, polycaprolactone, polybutylene succinate adipate, polyvinyl alcohol, starch, polyesteramide, and regenerated cellulose.