The use of calcium/zinc stabiliser systems has been common in PVC applications for over 25 years.
These materials are generally based on metal carboxylates and will sometimes incorporate other elements to boost performance such as aluminium or magnesium.
Properties and Applications
Because of the characteristics of calcium/zinc stabilised materials they are widely used in many flexible and rigid PVC applications. This type of stabilising system can give products which have a high degree of clarity, good mechanical and electrical properties, excellent organoleptic properties and good outdoor weatherability.
This type of stabilising system can give products which have a high degree of clarity, good mechanical and electrical properties, excellent organoleptic properties and good outdoor weatherability.
As a result, calcium/zinc stabilisers have been incorporated and established in a wide range of applications. These include toys, healthcare products, such as blood bags, semi-rigid and flexible foil for food packaging, bottles for potable water, as well as for potable water pipe.
So far, the penetration of calcium/zinc stabilisers in these three sectors is almost complete in drinking water pipes, well advanced in cables but still limited in other pipes and profiles. Sales of formulated Ca based stabilizers in Western Europe and Turkey , including Ca/Zn, have increased from 18 kt in 2000 to 56 kt in 2007.
Further growth is expected as a result of the progressive phasing out of lead-based systems. In the sector of flexible foils where the main stabiliser used is a barium/zinc soap, substitution by calcium/zinc materials is also taking place although, again, there are technical issues which need to be overcome.
Contact Person: Mr. Jim