How to create the multiple files based on segment.

Hi Experts,

sender side and receiver side i am using  same idoc. IDOC to  sFTP  Scenario (1:1 mapping)

sender side IDOC

IDOC

    E1STATE

    E1STATE  

for two segments E1STATE  i need to create  two files based on E1STATE. i need to split the idoc based on E1STATE segment and for each E1STATE segment i need to create one file.

please provide me solution for this requirement

Thanks,

Aadi