We have printed on nylon backpacks, using special transfer materials like this which SPECIFICALLY say they can be applied to nylon. In this case you only need 305 degrees for 5 seconds, a setting most nylon bags can handle.
We have had small quantities printed for us by Wellington House, and were very satisfied, as were our customers.
Stahls CAD-COLOR Digital Media
Solutions™ OPAQUE
This innovative digital media for heat transfer application is perfect for printing high quality, full-color custom graphics. Featuring STX2™ adhesive with amazing stretch and rebound properties, Solutions™ Opaque will not crack or peel. It can be used with solvent, eco solvent or thermo-resin print and cut systems and is specially formulated to work on dark colored garments.
Time: 5 seconds, peel COOL, cover and seal 5 seconds
Temperature: 305ºF / 152ºC
Pressure: Firm (#7) Based on Stahls’ Hotronix® Heat Presses
Comment: Preheat garment; Solutions™ mask required
Recommended fabrics:
• Lycra®/spandex
• Woven nylons
• Knit nylons • 100% cotton
• 100% polyester
• Poly/cotton blends • Fleece
• Mesh
• Vinyl • Waterproof nylons
• Synthetic Leather
• Leather