Welcome to ADF&PCD Paris 2018

Gerhard Passenegg (ex SCHEKOLIN AG)Technical DirectorSalchi Metalcoat S.r.l.Viale dell’Industria 3/A – 3/B20875 Burago di Molgora (MB)Italy

UV-curable packaging coatings for aluminiummonobloc cans

Agenda

1. Introduction Salchi Metalcoat

2. Technology in general

3. Process flow Aerosol-cans

4. Status of development

5. Outlook

Salchi Metalcoat

▪ Established in 1993

▪ Complete portfolio of coating solutions

▪ Coil coatings, including inks and adhesives forcolamination

▪ Packaging coatings, including metal decorationinks

▪ 130 employees in Burago Molgora, Italy

▪ 30% in R&D and Quality Control

▪ Production capacity of 27 000 tons/year liquid paints, inks and adhesives Burago di Molgora Plant 20 kms from Milan

Salchi Metalcoat and Schekolin

▪ Acquired metal packaging business of Schekolin AG in 2017▪ Metal Sheet▪ Aluminium Tubes and Monobloc▪ Complex Objects▪ Powder coatings

▪ Foundation of SMBB – Salchi Metalcoat Bendern Branch▪ 5 employees in Gamprin-Bendern, Principiality of

Liechtenstein▪ Focusing on R&D UV coatings for metal application

▪ SMBB acts as a service lab for customers, especially for thegerman speaking DACH-region

Sägastrasse 34, 9485 Nendeln, FL

TechnologyUV-curing coatings – Free radical curing technology

The photoinitiator decays intoradicals starting a chain reactionpolymerization with the doublebonds of the resins (acrylates)and monomers due to UV-radiation.

TechnologyUV-curing coatings – UV-cationic technology

The photoinitiator (a salt andblocked strong acid) decays intoan acid which starts the reaction(polymerization) due to UV-rays.This acid-curing reaction isstrongly influenced bytemperature.

TechnologyUV-curing coatings – Advantages and Disadvantages

+ Wide process window for application, curing and post-processes not time limited

+ No post-cure effect

+ Compatibility with UV printing inks

+ Fast curing

- Smell after curing

- Oxygen inhibition in thin layers

Free radical curing technology UV-Cationic technology

+ suitable for post-processes

+ Highly flexible

+ No smell after curing

+ Hot water resistant

- Post cure effect and overcuring can limitthe post processes

- Limited range of raw materials

- High raw material prices

Process flow Aerosol-can decoration

1. Impact-process, cutting, washing

2. Internal protection lacquer 8-12 µm

3. Stoving 5‘/260°C

4. Base coat clear, white 12-18 µm 6-9 µm

5. Stoving 5‘/100°C (pre drying) i.e. UV-Omega (10-12’’)

6. Printing UV-Inks

7. Stoving 5‘/150°C i.e. UV-Omega (10-12’’)

8. Overprint varnish, clear 6-9 µm 3-6 µm

9. Stoving 10‘160°C i.e. UV-Omega (10-12’’)

10. Necking and shaping

Significantchange

Thermal versus UV

Status of development

▪ UV-Basecoat, colourless cationic

▪ UV-Basecoat, white cationic

▪ UV-Basecoat, white-tinted cationic

▪ UV-Overprint varnish, semi-matt cationic

▪ UV-Overprint varnish, brilliant cationic

OutlookLED-curing coatings – Advantages and Disadvantages

Advantages Disadvantages

+ Pure UV-Light, low thermal stress

+ No warm-up period, energy efficient

+ No mercury, ecologically friendly

+ Long life span, approx. 20 000 h

- Small selection of functioning lacquers, expensive materials

- Only a few working initiators, danger ofyellowing

- Lacquers are extremely light sensitive

- Difficult to cure completely

Thank youfor your attention

Gerhard PasseneggSalchi Metalcoat s.r.l. Burago di MolgoraBendern-BranchIndustriestrasse 3FL 9487 Gamprin-Bendern

Mail: Gerhard.Passenegg@salchirh.itTel: 00 423 794 04 62