Technomelt PUR 3317 Adhesive Pellets for PUR Perfect Binding

Print & Finishing Solutions supplies Technomelt PUR 3317 pellets for open-tank PUR perfect binders running coated, digitally printed, and difficult-to-bond stocks. Applied by roller or nozzle, this moisture-curing adhesive develops 50% to 80% of its final bond strength within 12 to 24 hours. Before production, confirm the binder’s adhesive format, actual application temperature, glue-film thickness, stock treatment, and required cure time. The pellets come in 1 kg bags for controlled loading and storage.

FAQs

Is Technomelt PUR 3317 compatible with my perfect binder?

Print & Finishing Solutions stocks PUR 3317 pellets for open-tank PUR binders, including the Horizon BQ-160PUR and other compatible systems. Confirm that the binder accepts pelletized reactive PUR. Sealed-package and drum-fed systems may require a different format.

What application temperature should operators use for Technomelt PUR 3317?

The manufacturer recommends an actual roller or nozzle temperature of 115°C to 130°C, or 239°F to 266°F. The PFS pellet listing specifies a 135°C machine setting. Verify the adhesive with an external thermometer because the displayed temperature may differ from the measured temperature.

How thick should the PUR adhesive film be?

Apply a 0.3 to 0.6 mm adhesive film, adjusting for book size, weight, paper, and spine preparation. For book blocks thicker than 10 mm, work toward the upper end of that range. Check pull strength and page flex with the actual production stock.

How long does Technomelt PUR 3317 take to cure?

The adhesive can reach 50% to 80% of final bond strength within 12 to 24 hours. Final strength usually develops within one to two days. Humidity, paper moisture, film thickness, substrate permeability, and storage temperature affect the cure rate.

Can PUR-bound books be trimmed before the adhesive reaches final strength?

Books can generally move to downstream processing after the initial physical set, though final pull strength develops later. Set finishing and shipment timing through tests with the actual stock and spine preparation, especially when short-turn work is scheduled for same-day dispatch.

Which stocks are suited to Technomelt PUR 3317?

PUR 3317 bonds to many paper grades, including difficult coated stocks. It also adheres to PVC and acetate films. Polypropylene and polyethylene films require recent corona treatment above 40 mN/m. Test each toner, ink, coating, and film combination before releasing the job.

How should opened PUR 3317 pellets be handled?

Limit exposure to atmospheric moisture and reseal unused adhesive promptly. Do not mix PUR 3317 with other adhesives. Follow the current safety data sheet, binder cleaning procedure, ventilation requirements, and protective-equipment instructions when working with molten reactive adhesive.

Why can PUR curing slow down in a cold bindery?

Keep freshly bound products at or above 18°C, or 64°F. Lower storage temperatures slow the moisture-curing reaction, and dry paper can delay it further. Account for bindery humidity, paper moisture, and post-bind storage when planning production.

This table compares Technomelt PUR 3317 pellets with the adhesive formats most often evaluated when matching glue to a perfect-binding system.