What Is Cast Film Extruder?
Direct Answer
A cast film extruder melts plastic resin and casts it into a flat film, the starting material for diaper backsheets.
Key Takeaways
- A cast film extruder melts plastic resin and casts it into a flat film, the starting material for diaper backsheets.
- How it works: Resin pellets are melted and extruded through a flat die onto a chill roll, forming a thin uniform film that can then be micro-perforated for breathability..
- PE backsheet film for diapers
- Film thickness uniformity drives leak protection and cost
How Cast Film Extruder Works
Resin pellets are melted and extruded through a flat die onto a chill roll, forming a thin uniform film that can then be micro-perforated for breathability.
Examples and Applications
- PE backsheet film for diapers
- Film base for breathable micro-porous backsheets
Cast Film Extruder vs. Related Terms
| Term | What it is | Key difference |
|---|---|---|
| Micro-porous film | Cast Film Extruder | The extruder makes the film; perforation makes it breathable |
Limitations and Common Misconceptions
- Film thickness uniformity drives leak protection and cost
- Breathability comes from a separate perforation step, not extrusion alone
How is diaper backsheet film made?
A cast film extruder melts PE resin and casts it into a thin flat film, which is later micro-perforated to become breathable.
References
- JP CIA (industry) - Baby diaper material: key components and their functions — 行业媒体 (accessed 2026-08-02)
- EDANA - What are nonwovens? (ISO 9092 / CEN EN 29092 definition) — EDANA (accessed 2026-08-02)