Packaging optimization: small details, big impact

Wall thickness determines the material volume of a plastic package. Reducing it in a targeted way can significantly lower the weight. Mechanical and protective properties must be carefully evaluated to ensure that material is not reduced in critical areas. Modern materials testing and lab trials help determine the minimum required wall thickness. Switching the production technology – for example, from injection molding to thermoforming – can also enable thinner walls. 

Topology optimization refers to the targeted distribution of material within a package, adjusted to the actual load. Material is reduced where less is needed and reinforced where it’s critical. The result is a design that combines high stability with minimal material usage. This requires deep understanding of mechanical loads and plastic behavior. The outcome is lightweight, stable packaging that can be flexibly tailored to various requirements. 

Packaging sometimes contains elements of limited benefit, such as secondary closures or inserts. Additionally, many packages are larger or more robust than necessary, either out of caution or for historical reasons. A critical analysis allows for targeted reduction of overengineering and superfluous components.

To promote the recyclability of plastic packaging, the use of monomaterials or easily separable materials is essential. This facilitates sorting and processing during recycling. Complex multilayer composites made of different plastics or materials hinder separation and reduce or even prevent the efficiency of recycling. Permanently bonded materials can contaminate recycling streams and impair the quality of the recycled plastic. The consistent use of monomaterials or easily separable components significantly improves circularity and enables effective recycling.

Decorative elements such as labels and sleeves are important components of packaging. To ensure high recyclability, they must support the recovery process. Ideally, they are made from the same material as the packaging body or can be easily separated during sorting, for example through density differences or mechanical removal. Particularly advantageous are integrated solutions such as in-mold labeling, in which the decoration is directly fused with the packaging body during manufacturing. This creates a mono-material solution that facilitates single-grade recycling and significantly improves circularity. Ideally, a label is chosen that detaches completely from the main plastic component in the shredder without leaving any residue, thereby achieving a higher purity of the recycled material.

Washable printing inks, coatings, and adhesives leave no problematic residues and can be easily and completely removed during the recycling process. This helps ensure that the quality of the recycled plastic is preserved and its range of potential
applications is not limited. The use of soluble or washable inks and adhesives is therefore an important lever in packaging optimization.

Reducing wall thickness, eliminating unnecessary components, or improving geometry can significantly reduce material usage. Cost advantages also result from using more economical materials, such as plastics with better availability. In addition to price, factors like processability, long-term supply security, and sustainability play key roles. 

More compact designs, improved stackability, and reduced void space enhance spatial efficiency in storage and logistics. This lowers transport costs per unit, reduces the number of trips, and saves fuel and labor. Warehouse space is used more
economically, and both logistics providers and retailers benefit from compact, easy-to-handle packaging. 

Standardized dimensions, simplified shapes, and improved machine compatibility streamline the packaging process. Packaging that can be easily filled, sealed, stacked, and palletized through automation saves labor time, increases process reliability, and reduces reject rates. Better handling also lowers effort during picking and repacking.

For temperature-sensitive products, shape and volume directly affect energy consumption. Compact packaging with minimal empty space can be cooled more efficiently – in warehouses, during transport, and at the point of sale. This reduces energy usage per unit, optimizes refrigeration capacity, and improves the product’s carbon footprint.

In many markets, packaging fees, such as those under extended producer responsibility (EPR), are calculated based on material usage, recyclability, or carbon footprint. Optimized designs reduce material volume and disposal costs while improving classification within EPR systems. This helps reduce fee-related expenses for manufacturers and retailers. 

Many individual measures within packaging optimization – such as reducing packaging weight, eliminating unnecessary components, or improving stackability – add up to a significant reduction in climate-relevant emissions. Less material means less CO2 during production. More compact packaging reduces transport-related emissions. And improved recyclability lowers CO2 compared to producing virgin materials. Through smart packaging strategies, companies and entire industries can make meaningful contributions to their climate targets.

Optimizing material usage and geometry makes it possible to produce packaging using significantly less plastic without compromising functionality or product protection. This not only reduces the consumption of fossil-based raw materials but also lowers energy demand across production, processing, and transport. Downstream environmental impacts – such as during collection and disposal – are also reduced. Every unit of packaging saved directly contributes to resource conservation and emissions reduction.

The recycling rate of packaging depends largely on how well it can be sorted and reprocessed. Improvements that enhance material separability, avoid problematic additives, or promote the use of pure plastic types significantly increase the likelihood of reintroducing materials into the circular economy. This not only reduces the amount of waste that ends up in landfills, is incinerated, or – worst of all – carelessly discarded into the environment. At the same time, it enables the production of high-quality secondary raw materials that can be reused in new packaging. This actively supports the transition from a linear to a circular packaging system.

Reduced material usage and improved recyclability help achieve environmental goals and meet legal requirements. They are also valued by environmentally conscious consumers, strengthening the brand’s credibility in terms of sustainability. 

Even aside from sustainability considerations, optimized packaging with streamlined designs, improved functionality, and attractive aesthetics can enhance visibility at the point of sale. This sets the brand apart from competitors and boosts customer satisfaction.

Geometric refinements and the removal of unnecessary components can improve packaging usability – for example, by making it easier to open, reseal, or dispense. This improves the user experience and strengthens customer loyalty.

Savings in materials and production create financial flexibility for pricing or marketing. Standardized packaging formats also allow quick adaptation to evolving market demands, speeding up time-to-market and reducing costs.