Coreless coil savings calculator
Technical Analysis: Cored vs. Coreless Rolls
The Definitive Comparison of Stretch Film Efficiency
The transition from traditional technology to Coreless technology (without a cardboard core) represents one of the most significant innovations in the industrial packaging sector. This comparison scientifically analyzes why the cardboard core has become an element of economic and environmental inefficiency.
In traditional rolls, the internal cardboard core can weigh on average 300–800 g per single roll. This means that a significant portion of the purchased (and transported) weight is not usable film, but material destined for immediate disposal.
1. Structural Differences and Environmental Costs
| Parameter | Cored Roll | CORELESS Roll |
|---|---|---|
| Internal Core | Cardboard tube (300-800g) | ABSENT (0g) |
| CONAI Contribution | Mandatory (258€/ton) | EXEMPT (0€) |
| Waste Produced | Disposal of used tubes | ZERO WASTE |
| Usable Film | Limited by tube weight | 100% OF PURCHASED WEIGHT |
2. Load Analysis: Example 2.4 kg Roll
To understand the inefficiency, let's analyze the weight distribution in a standard roll compared to a coreless one with the same film yield:
Traditional Roll
Stretch Film: 1.6 kg
Cardboard Core: 0.8 kg
Usable: 66.7%
Coreless Roll
Stretch Film: 1.6 kg
Cardboard Core: 0 kg
Usable: 100%
3. Logistics and Productivity Efficiency
The impact of the core heavily affects transportation costs and operational speed:
| Logistics (per 1,000 kg) | Coreless rolls allow for the transport of +50% of usable film for the same gross weight, eliminating 333kg of cardboard per ton. |
| Operability | Eliminating cores reduces dead time needed for collecting and disposing of tubes. Operator productivity: +5% / +12%. |
Annual Impact (Example 10,000 rolls)
A company that consumes 10,000 cored rolls per year (800g core) achieves the following benefits by switching to Coreless:
Cardboard eliminated
CONAI Savings
CO₂ avoided
In summary: +33% Usable Film | -100% Waste | -100% CONAI Taxes
The Coreless system is not just an ecological choice, but an immediate competitive advantage for logistics and the company balance sheet.