Anyone can coat film once. The difference between a good roll and a bad one is measured in microns and in degrees of cure — and it is decided every hour, not once.
Coating width 1,650 mm. Line speed 18 m/min. Two shifts, five days, with a weekly deep-clean shutdown.
Every TPU master roll is tested for thickness, haze and tensile before it is allowed onto the line. Non-conforming rolls are returned to the supplier, not downgraded into a cheaper series.
Corona and plasma treatment raise the surface energy of the TPU so the clear coat anchors chemically rather than mechanically. This is the step most often skipped to save cost — and the reason cheap film delaminates in year three.
Sub-micron gravure application of our self-healing top layer, followed by a three-zone graduated cure. Film thickness is monitored inline at 1,000 points per metre.
Low-tack acrylic adhesive applied under controlled temperature and tension, then married to a silicone-coated PET liner. Tension deviation above 2% triggers an automatic reject.
100% visual inspection under 45° raking light, plus spot measurement of gloss, adhesion and thickness. Each roll is labelled with its batch, line and operator, and retained for 24 months.
Every series is released only after the full programme below. Results are published per batch, not per marketing claim.
| Test | Method | Duration | Acceptance |
|---|---|---|---|
| Accelerated weathering | QUV / ASTM G154 | 3,600 h | Δb* < 2, no cracking |
| Salt spray | ASTM B117 | 1,000 h | No undercut, no blistering |
| Impact resistance | ASTM D2794 | — | No penetration at 2 kg·m |
| Peel adhesion | ASTM D3330 | — | 1,200–1,500 g / 25 mm |
| Elongation | ASTM D882 | — | > 300%, no whitening |
| Self-healing | In-house, 40 °C | 30 min | Full recovery of 50 µm scratch |
| Hydrophobic recovery | Contact angle | — | > 105° after 500 abrasion cycles |
Each carton carries a batch code that resolves to the TPU master roll, the coating run, the operator and the QC record. If a field failure appears, we can tell you within the hour whether it is a film problem, an installation problem, or a batch problem.
It also means we can stop a suspect batch before it reaches your warehouse — not after your customer has already posted a photo of it.
Tell us your market, your volume and the brand you sell. We will send a sample, a price list and a straight answer within 12 working hours.