Envelope window
IFS was the first film manufacturer in the world to develop a film based on polypropylene copolymers, specially designed for application in postal envelope windows.
The AW product range, due to its low density of 0.91 g/cm3, compared to traditional polystyrene-based films with a density of 1.05 g/cm3, allows a minimum reduction of 14% in the volume of plastic used for this application due to its higher yield.
AW films are 100% recyclable and 100% biodegradable in their RBC version and can be easily separated from paper allowing separate recycling. AW films have the main certifications for the postal market.

Products
BOPP
AW® - 12R
Description
AW-12R is an innovative BOPP film of very high stiffness, designed for envelope window application, according to the needs and requirements of the sector. It is 100% recyclable with low environmental impact, free of Bisphenol, Phthalates and heavy materials. Its formulation is based on Homopolymers and Copolymers.
Properties
- Static-free film
- High coefficient of friction
- Very high rigidity
- Perfect flatness, high resistance to tearing and perforation
- Two-dimensional stability coefficients adapted to all types of machines and speeds
- Excellent optical properties for use in postal sorters and OCR systems in inserters
- Excellent yield per square meter

AW® - LASER
Description
AW-LASER is a polyester film for application on envelope windows to be printed on digital printers. Its high transparency, low heat shrinkage and high stiffness make this film the best solution for this type of application.
Properties
- Low distortion
- Excellent rigidity
- Highly bioriented film for perfect cutting performance
- Excellent bonding behavior
- Very good dimensional stability
- Stable at temperatures between -30ºC and +80ºC.

AW® - RBC
Description
AW RBC is a Biodegradable and Recyclable polypropylene film, specially designed for postal envelope window. Free of Bisphenol, Phthalates and heavy materials, in addition to a low environmental impact.
Properties
- Static-free film
- High rigidity
- Perfect flatness, high resistance to tearing and perforation
- Two-dimensional stability coefficients adapted to all types of machines and manufacturing speeds
- Excellent optical properties for use in postal sorters and OCR systems in inserters
- Excellent yield per square meter
- High coefficients of friction
