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Description

PRINTABLE RELEASE COAT FOR PP ADHESIVE TAPES

RELEASE ST4 M is a heterogeneous solution of synthetic resins in alcoholic/hydrocarbon solvents.

Application

RELEASE ST4 M is a new compound in solvent solution, designed to replace the standard release coat (RELEASE PP 25) in the production of PP tapes which will be printable with a single-pass printing machine. Process is similar to PVC tapes, without using primer and release, and requires using only suitable inks (see notes below). No corona treatment is necessary.

Technical Specifications

Handling

• RELEASE ST4 M must be well stirred before use, till it becomes perfectly liquid.
• Product temperature before application should never go below 20°C (preferably between 25-35°C).
• Dilution: 1 pp with 15 pp of a blend of toluene and isopropyl alcohol (70:30).
• The final solution will be applied on untreated BOPP film of 32-35 micron for 4-5 g/sqm wet.
• Coating must be perfectly dried and adhesive must retain less than 0.6 g/sqm of residual solvent.
• Pick up rolls must carry 80 lines/cm.
• Rubber cliché must be resistant to aromatic hydrocarbons.
• Drying system must be very efficient.

Packing

Metal drums, 50 / 200 liters.

Storing

RELEASE ST4 M gels at low temperatures and must be kept at 20°C or above.
In case of freezing, good heating and stirring will be necessary. Product must also be stirred every time before removing partial quantities from containers.

Notes

Polypropylene tapes coated with RELEASE ST4 M can be easily printed in a single-step process.

Ichemco can also supply a wide range of polyamidic inks (COLOR INK PP PAM+ADD. series - one component inks, ready for use). See our web site (www.ichemco.it/inks) for a full list.