Competek outlines PET bottle lightweighting process

Reducing the weight of a PET bottle involves more than lowering the amount of material used. Manufacturers seeking to reduce raw material consumption, improve efficiency and meet sustainability objectives must also maintain bottle performance and production line reliability. This requires a targeted approach covering preform design, bottle geometry and material distribution.

Through its Packaging Optimization approach, Competek supports manufacturers and brand owners throughout the lightweighting process. The company acts as a single partner from packaging design and development to industrialisation, line implementation and ongoing production optimisation.

"Successful lightweighting requires a clear understanding of the production process, line requirements and bottle lifecycle", said Luca Baldessin, Research and Development Manager at Competek. "As a single partner throughout the process, we combine engineering expertise with testing, validation and production support to help customers develop lighter bottles that are optimised for real manufacturing environments while maintaining performance and quality."

Turning lightweight designs into production-ready bottles

When designing a lightweight bottle, it is essential to determine how packaging changes will affect production performance. Competek has developed a set of procedures and tests intended to verify feasibility and performance throughout the development process.

Drawing on more than 30 years of experience in PET packaging, the company identifies optimisation opportunities aimed at balancing weight, strength, processability, cost efficiency and sustainability. The process begins with a technical assessment of customer requirements and continues through design, simulation, testing and performance validation.

The approach extends beyond bottle development. Through in-house packaging tests, line trials and on-site assistance, Competek works with customers during the industrial process. As a single point of contact, it supports the optimisation of blowing parameters, production recipes and overall packaging performance.

Measurable results in production

According to Competek, this end-to-end approach can help manufacturers reduce raw material consumption, lower production and logistics costs, optimise PET use and decrease the environmental impact of packaging.

Projects developed by the company indicate that bottle weight can be significantly reduced while maintaining the required functionality, strength and performance. Competek's technical teams also support customers in selecting a suitable mould solution to achieve the required production performance, efficiency and packaging quality. The objective is to transfer improvements achieved during development into reliable and efficient industrial production.