bottom surface upper surface cross-section inner walls
PLLA rare pores,  3–6 µm oval pores, 5–10 µm multiple, oval pores, 5–15 µm thickness 1–2 µm
PLLA+PVP rare, 5–15 µm oval pores, 2–20 µm multiple, oval pores, 5–15 and 20–30 µm thickness 1–2 µm, perforations
PLLA+PVP+Pluronic® rare pores, 10–15 µm and ~1 µm oval pores, 10–40 µm multiple, oval pores, 10–15 and 20–30 µm thickness 1–2 µm
PLLA+gelatin nano-non-woven rare pores, ~5 µm multiple, irregular pores, 20–50 µm multiple, irregular pores, 20–80 µm thickness 2–5 µm, perforations
PLLA+gelatin nano-non-woven+PVP rare pores, 5–10 µm multiple, irregular pores, 20–40 and 5–15 µm multiple, irregular pores, 20–70 µm thickness 1–2 µm, perforations
PLLA+gelatin nano-non-woven+PVP+Pluronic® rare pores, 5–10 and ~20 µm multiple, irregular pores, 20–40 µm multiple, irregular pores, 20–80 µm thickness 5–10 µm, perforations, segments
PCLA+gelatin nano-non-woven rare pores, <5 µm multiple, irregular pores, 20–50 µm multiple pores, nearly oval, 20–60 and 10–15 µm thickness 1–3 µm, perforations
PCLA+gelatin nano-non-woven+PVP rare pores, 5–10 and ~20 µm multiple, irregular pores, 20–40 µm multiple pores, nearly oval, 50–80 µm thickness 3–5 µm, perforations
PCLA+gelatin nano-non-woven+PVP+Pluronic® rare pores, 5–15 µm multiple, irregular pores, 20–40 µm multiple pores, nearly oval, 40–80 µm thickness 5–10 µm, perforations, segments
PCL+gelatin nano-non-woven rare pores, <5 µm irregular pores, 20–40 and ~5 µm oblong pores, 40–80 µm thickness 5–15 µm, twisted
PCL+gelatin nano-non-woven+PVP rare pores, 5–10 µm irregular pores, 20–40 µm Oblong pores, 40–80 µm thickness 5–15 µm, twisted
PCL+gelatin nano-non-woven+PVP+Pluronic® rare pores, 5–15 µm irregular pores, 20–40 µm oblong pores, 40–60 µm thickness 5–15 µm, twisted, segments