When selecting a water-borne adhesive for hot stamping foil production, start with three points: the substrate, the coating process, and the stamping temperature.

Check the Substrate

Hot stamping foil may be used on paper, OPP, PET, PVC, leather, and other materials. These substrates do not have the same surface properties or heat resistance.

Before choosing an adhesive, confirm:

• The final stamping substrate
• Any surface treatment on the substrate
• The required adhesion
• The stamping temperature and pressure

A laboratory test is recommended because the same adhesive may perform differently on different foil and substrate combinations.

Consider Drying and Back Tack

On a continuous coating line, the adhesive must dry before the foil is rewound. If the coating is not fully dried, the roll may block during storage.

Drying performance is affected by coating weight, oven temperature, airflow, and line speed. The adhesive should also remain non-tacky after proper drying.

Confirm the Activation Temperature

A lower stamping temperature can be useful for thin films and delicate papers. It may help reduce shrinking, warping, or other heat-related damage.

The recommended range provides a starting point, but the final setting should be confirmed on the customer’s equipment. Pressure, contact time, production speed, and foil construction can all affect the result.

PU-8441 Water-Borne Adhesive for Hot Stamping

PU-8441 is a modified polyurethane adhesive manufactured by Sinograce Chemical for hot stamping applications.

Its main features include:

Fast drying

Good anti-back-tack performance

Excellent heat resistance

Suitable for hot stamping at 95–135°C

Good adhesion to paper, OPP, PET, PVC, leather, and other substrates

Typical Properties

These are typical values, not guaranteed specifications. Please refer to the latest technical data sheet before production.

FAQ

What substrates can PU-8441 be used on?

PU-8441 provides good adhesion to paper, OPP, PET, PVC, leather, and other commonly used substrates. A trial is recommended before commercial production.

What is the recommended hot stamping temperature?

The typical range is95–135°C. The final setting depends on the substrate, foil construction, pressure, speed, and equipment.

What are the MOQ, packaging, and lead time?

The MOQ is 200 kg. Packaging options include 200 kg drum sand1,000 kg IBC totes. Standard production lead time is generally within30 days after order confirmation.

For samples, technical data, quotations, or application support, please contactSinograce Chemical.