Technical Paper Overview
Optimal Processing of Polypropylene Films with CO₂ Lasers
Polypropylene film is the workhorse of modern flexible packaging and labels — clear or opaque, single-layer or laminated. Most converters cutting PP run the standard 10.6 µm CO₂ wavelength because that’s what most CO₂ lasers ship with. They also live with yellowed cut edges, scored bottom liners, and cut speeds that cap line throughput well below what the laser is theoretically capable of.
This technical paper from the Novanta Applications Lab derives the physics of why polypropylene’s C-C bond produces an absorption peak at 10.27 µm — and documents the gains from switching Synrad p150 lasers to the 10.2 µm wavelength: 22% speed gain on 140 µm laminated film, up to 80% on 80 µm PP, with yellowing and liner-scoring eliminated.
Key takeaways include:
- Why polypropylene’s C-C molecular chemistry produces an absorption peak at 10.27 µm — matched by the 10.2 µm laser wavelength
- How a Synrad p150 at 10.2 µm delivers 22-80% cutting-speed gains over the same laser at 10.6 µm on identical PP samples
- When 10.2 µm becomes essential: selective perforation of multi-layer pouches (PP top / LDPE liner) without breaching the liner
- What edge-quality differences look like in production: side-by-side comparisons of opaque and clear PP at both wavelengths
- A practical PP-thickness-vs-speed-gain table converters can use to project ROI before purchase
Download the full technical paper to get the polypropylene absorption-spectrum derivation, the thickness-versus-speed-gain table from the Novanta Applications Lab’s Synrad p150 testing, and side-by-side cut-edge comparisons — before specifying a CO₂ laser for your polypropylene label or packaging line.
