Set-up with Solidworks® on the left and with a 3D scanner on the right. 3D scanning is the only solution to generate the true geometry of a crown cork with each corrugation being freely drawn during the forming. Copyright: ArcelorMittal.
Packaging solutions are continuously evolving and are becoming increasingly sophisticated, not least with a strong focus on sustainability. The varied expectations of the packaging manufacturers, fillers, retailers and the end consumer are driving change – as the value chain seeks reduced environmental impacts, less raw materials, and greater manufacturing efficiency, through to increased brand differentiation, customer convenience and value for money.
Watch here the March webinar "Sustainable steel closures: redefining packaging innovation" or click here to watch the October session "Slim and smart 3-piece can bodies made with ArcelorMittal steels".
ArcelorMittal Global R&D team shone a light on their capabilities in collaborating with customers on sustainable steel closures and 3-piece can bodies earlier this year in two dedicated webinars hosted by The Canmaker - presented by Gilles Mangin, Packaging Product Development Engineer, ArcelorMittal Global R&D.
Steel is already recognised as one of the most sustainable solutions for packaging food and products. It is infinitely recyclable. Its magnetic properties make it the easiest and most economical type of packaging to sort and recover, and no matter how many times it is recycled steel never loses its strength or inherent properties.
At ArcelorMittal we're constantly exploring new ways to innovate steel for packaging, working to support our customers with their current challenges:
“The world of steel closure solutions is diverse and challenging, offering everything from easy-open ends, twist-off caps to crown cork and that is what we have seen in our first webinar” says Gilles. “The real challenge? It is to find the right compromise between reliability, convenience and sustainability. How do we and our customers ensure closures withstand sterilisation, remain easy for consumers to open and minimise material use and impacts without sacrificing performance? Our Global R&D technical teams work on these challenges day-by-day, so if you want a new cutting-edge steel packaging solution…we are here to collaborate and offer our expertise”.
One promising avenue is thinning or downgauging the steel closures. Through clever design and the use of high-strength steel grades like 620, 650 and 700 MPa, we are creating closures that are thinner, yet just as robust, reducing the quantity of steel used, whilst maintaining performance.
In our second webinar Gilles presented solutions for 3-piece can body, the core component for food, aerosol and general line steel packaging. “In fact, the 3-piece can body represents around 2/3 of the total metal packaging weight. It is used in a variety of packaging forms going from the tiny 1/10 food can to the big pail can” says Gilles.
In his presentation Gilles Mangin described the importance of reliability and material usage in packaging, including downgauging, as innovation and lightweighting of 3-piece can bodies have been a motto of the steel packaging industry for a while now. “Nowadays with the need to keep on reducing the environmental footprint of any packaging, the path is far from reaching its end” underlined Gilles.
Gilles explains in the webinars that at the heart of ArcelorMittal's collaborative approach are its advanced digitalisation capabilities and R&D tools (for example 3D scanner and meshing using Zeiss®, and Finite Element Analysis (FEA) supported by Abaqus®). Digitalisation can reduce the time taken to scope out the geometry of a new component from seven days down to one day. Ultimately such advances can significantly speed up product development, slash time-to-market and minimise trial and error. Our Finite Element Modelling (FEM) can model and refine the gauging of steel thickness, and design and manufacturing variables required to match your product requirements, on aspects such as panel pressure tolerance, axial load resistance and rivet forming dynamics. FEM can identify and address potential weaknesses in component integrity even before trial production.
Set-up with Solidworks® on the left and with a 3D scanner on the right. 3D scanning is the only solution to generate the true geometry of a crown cork with each corrugation being freely drawn during the forming. Copyright: ArcelorMittal.
Real life vs Finite Element Modelisation: Finite Element Modelisation is able to reproduce the real life axial crushing of a 3-piece can.
Gilles illustrates the potential CO2 savings from case studies of downgauging an easy-open end, a twist-off cap and a crown cork solution, compared to typical examples in the market. To get more details, read the full article below. Using ArcelorMittal’s analysis, and proposed downgauging steel thickness by between -15 and -20 µm on these components, would deliver CO2 savings of circa 8.5 to 12.5%, whilst retaining product and manufacturing integrity.
|
Component |
Typical |
Proposal |
Lightweighting potential |
CO2 savings |
|
|---|---|---|---|---|---|
|
Designation |
Designation |
||||
|
Easy open end |
TH550 |
ML550 |
Maléis® range 600/620/650 |
- 20 µm |
-10.5% |
|
Twist-off cap |
TH580/620 |
TH580/620 |
TH680 |
- 20 µm |
-12.5% |
|
Crown |
TH580/620 |
TH580/620 |
TH700 |
-15 µm |
-8,5% (ref. 0.18 to 0.165 mm) |
Captions: About 10% of CO2 savings available now for steel closures using ArcelorMittal’s high strength steels.
|
Component |
Typical |
Lightweighting potential |
|---|---|---|
|
Food body |
YS 480-550 MPa |
Case by case |
|
Aerosol body |
YS < 340 MPa |
- 20 µm or more |
|
General line body / Shaped |
TS260EX |
0.170 mm |
Caption: Any steel thickness reduction is a direct CO2 savings for the component available now using hard strength steels from ArcelorMittal.
Under the EU’s REACH legislation, Chromium Cr(VI) chemicals must be eliminated from the existing tinplate passivation process by 2027. ArcelorMittal has been preparing for the change for some time, and has built up its Chromium-Free Passivation Alternative (CFPA) production capacity to accommodate full customer demand from 2025. So if your products are affected by REACH the clock is ticking to take action. We are actively developing a range of different surfaces and coatings for the future – aiming for better sustainability performance and improved energy management.
We’re keen to collaborate with you on your next packaging project or product upgrade, and can bring with us deep-seated global experience and technical expertise:
We are ready to offer you our expertise in co-developing your future products. Do not hesitate to contact us for more information.
For any enquiries please contact Gilles Mangin gilles.mangin@arcelormittal.com
Copyright: Banner image: ArcelorMittal Left & right columns images: ArcelorMittal