Adhesive Tapes - Printable Packaging Tapes - PR International Ltd

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PR INTERNATIONAL Ltd
Unit 2, Aerial Park, Asheridge road, Chesham, HP5 2ZE, United Kingdom
Telephone : +44 (0) 20 8050 8069
Email : pr@printernational.co.uk

PRINTABLE POLYPROPYLENE TAPES

Available in standard or heavy duty, with a wide range of adhesives. Polypropylene tapes offer a wide selection of choice to optimise performance. Particularly suitable for semi and fully automatic case sealing.

Can be applied by hand or machine

Clear Polypropylene tape has excellent clarity

Strong biaxially oriented film

Glossy finish

Requires a dispenser or knife to cut

Available with low noise or noisy adhesives

	*Specifications*
Carriers Thickness From	19 - 50mu
Adhesive Types	Noisy Acrylic, Low Noise Acrylic, Hot Melt, Solvent, Freezer Grade
Base Colour of Tape	White / Buff / Clear
Available Widths	12mm - 144mm
Available Lengths	Hand Rolls: 66m - 200m, Machine Rolls: 330m - 1056m
Lead Time (10 days, 20 days)	Yes

The best method of printing on Polypropylene tapes is by selecting appropriate tapes which have been specially surface treated (Corona treatment). Additionally it requires:

Special Printing Inks.

Printing Cylinders, which can be heated up to 50 ° C.

An extended Drying Tunnel with good ventilation.

Printing the tape within 6 months of receipt.

PR International offer the following Polypropylene Tapes for printing:
Polypropylene Printable Standard
Polypropylene Printable Silent Quality
Polypropylene Printable Hot Melt

Conditions of the printing machine:

The best results are obtained when the printing cylinder is heated up:
50 ° C for Polypropylene Standard
40 ° C for Polypropylene Printable Silent Quality
30 ° C for Polypropylene Printable Hot Melt

The drying tunnel should have good ventilation and the air temperature has to be between 50 and 60 C, except for the printing of Polypropylene Printable Hot Melt where the drying tunnel should not be heated.

Ideally the printing should be carried out on printing machines designed for Polypropylene Tape printing. For PP Printable Hot Melt it is possible to use a PVC printing machine, provided the printing cylinder can be heated to 30 ° C and has an extended drying tunnel with ventilation and blowing capacity.

Printing Inks:
To-day inks are available which are ready for use, e.g. the PU inks of Supercolor, which are very generally used. If no special inks are available, it is possible to use polyamide inks mixed with isopropylc alcohol and heptane.

Stereos:
Recommend is red Semperit or photopolymer. For Polypropylene Printable Hot Melt rubber stereos as used for PVC printing can also be used.

Working procedure:
The print rolls Polypropylene Printable Silent Quality should be stored at a temperature of 20 °C to 30 °C. before using them since this makes the unwinding lighter and enables a higher speed on the printing machine.
Where required heat up the printing cylinders. Install the ventilation system and make sure that the air in the drying tunnel has the right temperature. For Polypropylene Printable Hot Melt the drying tunnel must not be heated and ventilation has to be at maximum blowing capacity.
Though it is not imperative it is recommend that the tape is cleaned by mounting on the machine a piece of felt which rubs off possible dirty spots.
Adjust the friction of the winding system in order to avoid that the cores will be crushed.
The speed of the machine stays in close connection with the capacity of the ventilation and the drying tunnel.
In case the tape is insufficiently dried a problem with off-setting of the ink may arise. This can be noticed immediately.
The recommended speed of the machine is 80 to 100m. per minute.
In case there is a problem like ink transfer, too high unwinding resistance or tape splitting, this indicates that the drying is insufficient. In this case it is recommend that the speed of the machine be reduced or the performance of the drying tunnel will have to be improved.
To check the print quality, a method generally used is to place a roll in a refrigerator for 15 minutes. By means of a fast unwinding any problem will be noticed. In case there is a problem like ink transfer, too high unwinding resistance or tape splitting, this indicates that the drying is insufficient. In this case it is recommend that the speed of the machine be reduced or the performance of the drying tunnel will have to be improved. The problem may also be resolved by adding to the ink a solvent of isopropylic alcohol and heptane.

General Remarks:

During cold periods the inks should be stored at a temperature of 18 ° C to 20 ° C. In case the inks have become solid this can be resolved by immersing the container in a vessel with luke warm water.Before using the ink it has to be stirred thoroughly in order to obtain a perfect mix. Make sure that the containers of ink are well closed in order to avoid evaporation.

At the end of the day the ink which remains in the containers of the machine should be placed back in the original container.During a stop of the production the heating system of the printing cylinder should be disconnected since a too high temperature will create problems with the proper winding of the tape.
Floodcoat printing has to be avoided.

Contact us by phone, e-mail for any adhesive tape requirement
Web: www.printernational.co.uk ~ Tel: +44 (0)20 8050 8069 ~ E-mail: pr@printernational.co.uk