Caps and Closures
The use of additives in plastic caps and closures is a practical requirement to allow for easier processing and handling. Performance restrictions and requirements in consumer sensitive applications, such as food and drinks, increases the demand for more advanced additives that will offer an improved quality to reduce impact on the final product.
Why Use Additives in Caps & Closures?
Slip, torque and mold release additives allow plastic screw caps and closures to be produced and used more efficiently. Our torque release additives not only offer processors and end-users flexibility, performance and better quality plastics as expected, they also provide exceptional stability with reduced odour and colour degradation.
Key benefits
- High slip performance with improved stability
- High temperature performance
- Low taste
- Low odour
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Oxidative Stability and Organoleptic Properties
Standard torque release additives can demonstrate poor oxidative stability that can result in poor odour, taste and taint. This can have a huge impact on the finished article, for example bottled water.
Our range of highly stable additives have been shown to significantly reduce odour and taste issues in more challenging environments, such as in warmer climates or when exposure to UV light.
In particular, Incroslip SL, is extremely stable and therefore less prone to oxidation. This can add value in caps and closure applications such as water bottle caps where taste and odour is critical.
Case Study : Reduce taste and taint issues in caps
A manufacturer of bottled water approached Croda to reduce poor organoleptic properties that were present due to using a standard fatty acid amide torque release agent for the bottle cap.
The manufacturer was using an ozone sterilisation process so Croda suggested using Incroslip Q, a tailored solution that can minimise taint and taste issues while providing the level of torque release force required to remove caps.
Incroslip Q helped the manufacturer to balance good organoleptic properties through the ozone sterilisation process and good cap closure properties to ensure a well-received consumer product.