# What is the primary difference between Microporous and Monolithic films?

> Source: https://breathablefilm.com/news/knowledge-center/microporous-vs-monolithic-films/
> Author: kh_sales02
> Published: 2026-04-28
> Updated: 2026-08-28

## Key takeaways

- Microporous films (PE/PP) are engineered through mechanical stretching to create billions of micro-scale pores that block liquid water while letting vapor pass through.
- Monolithic films (TPEE) are non-porous, solid-state membranes that transfer moisture via molecular diffusion through hydrophilic polymers.
- Monolithic films give a more consistent barrier against viruses and chemicals, while microporous films offer higher air permeability and lower cost.

## Frequently asked questions

### What is the primary difference between Microporous and Monolithic films?

Microporous films (PE/PP) are created through mechanical stretching that produces billions of micro-scale pores, physically blocking liquid water while letting vapor molecules pass through open channels, making them well suited to medical gowns, hygiene backsheets, and construction wraps. Monolithic films (TPEE) are instead a non-porous, solid-state membrane that transfers moisture through molecular diffusion, using hydrophilic polymer chains to absorb and pass moisture chemically rather than physically, which is why they excel in high-performance outdoor gear and viral-barrier applications where an absolute physical barrier plus breathability is needed.

### Which film type is better for medical protective gowns?

Microporous films suit standard medical gowns and hygiene backsheets, while monolithic films are preferred for viral-barrier surgical gowns that need a stronger, more consistent barrier.