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Pad Printing Inks for Polypropylene
UNIPAD-12PP, a high-gloss speciality ink formulated for untreated polypropylene.
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Overview
UNIPAD-12PP series
UNIPAD-12PP is a high-gloss speciality ink designed for printing on untreated polypropylene, offering excellent adhesion to most polypropylene-based substrates. The purer the substrate, the greater the adhesion without pre-treatment. Additional applications include treated polypropylene, treated polyester, metal, lacquered surfaces and polyurethane.
With the addition of hardener the series offers exceptional abrasion resistance and an extended pot life of 8–9 hours, and is formulated with pigments free from heavy metals.
Owing to the production process, some polypropylene materials show lubricant residues on the surface which can reduce adhesion of the ink film. Since printability varies even within an individual substrate type, preliminary trials are essential to determine suitability for the intended use.
Product data
| Chemistry | Two-component solvent-based pad printing ink |
|---|---|
| Pot life | 8–9 hours with hardener |
| Pigments | Free from heavy metals |
| Applications | Stadium cups, frisbees, syringes, medical devices, measuring cups, cosmetics, industrial housings |
| Pack size | 1 kg and 5 kg |
White paper
Why polyolefins are hard to print
Pad printing puts a very thin ink film, typically 5–10 µm wet, onto the substrate. An ink can only adhere where it first wets, and wetting requires the substrate surface energy to exceed the ink surface tension by a margin of roughly 10 mN/m.
Pad-printing inks are formulated at about 28–32 mN/m. Untreated polypropylene and polyethylene sit near 29–31 mN/m, which is why they normally need flame, corona or plasma treatment. UNIPAD-12PP is formulated to bite into the polymer directly, so that clean, pure PP can be printed without pre-treatment.
Downloads
Technical documents
Download the Technical Data Sheet, Safety Data Sheet and Regulatory Summary for every product in this range. Technical data sheets are provided as standard for all Uniform Industries printing inks and coatings.
| Product | Description | Documents |
|---|---|---|
| UNIPAD-12PP | Pad printing ink series for polypropylene | TDSSDSRegulatory |
TDS = Technical Data Sheet. SDS = Safety Data Sheet (MSDS) according to Regulation (EC) 1907/2006 Annex II and UN GHS. The Regulatory Summary lists the compliance status of each product. Click a document to read it online in the viewer; each document can also be downloaded as PDF (up to 5 downloads per location). Product catalogues are available to read online. For a controlled copy, a declaration of compliance for your specific application, or documents for a product not listed here, write to sales@ufindustries.com.
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Science Technology Innovation & Application. Printing inks and coatings for packaging, label and graphic printing since 2006.
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