PTFE Roll Coating for Paper, Tissue, Converter, and Lamination Lines

Rolls fail. They wear, they pick up product, they need recoat on a cycle that drives the maintenance schedule for the entire line. AEGIS Advanced coats rolls up to 60 feet face length with PTFE, PFA, and FEP fluoropolymer systems engineered for the specific service. We coat in our Elkton Maryland facility for rolls that ship, and we coat on site for rolls that cannot leave the machine.

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Roll types AEGIS coats

• Tissue and paper machine rolls: yankee dryer rolls, press rolls, calendar rolls, and reel drum rolls. PTFE chemistry tuned to the moisture and temperature service.
• Converter rolls: tissue converter embossing rolls, lamination rolls, and slitter rewinder rolls.
• Flex packaging line rolls: laminator drums, adhesive transfer rolls, and pull rolls on bagging lines.
• Adhesive transfer rolls: hot melt transfer rolls, PSA transfer rolls, and label adhesive applicators.
• Steel mill caster rolls: high temperature PTFE chemistry for slab and bloom casters.
• Coating line rolls: gravure and metering rolls in liquid coating applications where release is required.

The roll length problem

Most PTFE coating shops have an oven length limit around 12 feet. Anything longer requires either a custom oven or a different cure approach. AEGIS solved this with in situ heat activation. Portable induction cure equipment lets us cure rolls up to 60 feet face length in place. Three implications:

• Roll length is not the constraint. If the substrate is metal and the induction coil can access the surface, we can cure it.
• Roll removal is optional. Some customers ship the roll. Others stay on site. The choice depends on freight cost versus down time cost.
• Cure profile is controlled and documented. Surface thermocouples track the cure temperature within plus or minus 10 F across the full roll length.

Read more about in situ heat activation.

Roll PTFE coating chemistry by application

Different roll service environments require different fluoropolymer chemistry:

• Yankee dryer rolls: PTFE plus ceramic primer system that survives the steam and abrasive doctor blade environment.
• Lamination rolls: PFA top coat for the higher temperature service of solvent based adhesive lamination.
• Adhesive transfer rolls: surface energy tuned PTFE that releases adhesive cleanly without picking up cured residue.
• Steel mill caster rolls: high temperature stable PTFE with thermal shock resistance for the casting environment.
• Food contact converter rolls: FDA 21 CFR 175.300 compliant PTFE for direct food contact applications.

Recoat cadence for industrial rolls

Roll PTFE coating recoat intervals vary widely by application:

• Tissue converter rolls: 9 to 12 months on heavy duty embossing service
• Paper machine yankee dryers: 36 to 60 months depending on doctor blade aggressiveness
• Adhesive transfer rolls: 6 to 12 months depending on adhesive chemistry and line speed
• Steel mill caster rolls: 12 to 18 months on continuous casting service
• Lamination rolls: 18 to 24 months on standard duty

AEGIS provides dimensional inspection at every recoat so customers can trend roll surface condition over time and plan major recoat events around shutdown calendars.

Roll geometry inspection and balance

Coating thickness is a structural input on a precision roll. AEGIS measures pre coating dimensions on every roll, plans the coating thickness to meet the finished diameter spec, and inspects post coating dimensions before release. For rolls that require dynamic balance (high speed converter rolls especially), we coordinate balancing with the customer or with a balancing partner before the roll returns to service.

Request a roll PTFE coating quote

Send the roll drawing or specifications including face length, diameter, substrate material, service description, line speed, and current coating spec. Engineering responds with a recommendation and quote inside 24 hours for shop work, 48 hours for field work.