Every year, more than 20 billion seals for preserving jars are produced in Europe. Until only a few years ago, the requisite sealant material was exclusively made of PVC, a fact which was given little or no attention for many years. But regardless of whether boxes, jars, cans or plastic bags are involved, wherever packaging comes into contact with food, the quality of the contents must not be compromised. The food authorities and consumer protection groups were increasingly focused on the seals of preserving jars. The time had come to take action. Actega DS collaborated with seal and specialty food manufacturers to develop a PVC-free alternative.
Over a period of six years of research and development work, the to date unique seal solution was developed which – thanks to the PROVALIN® sealant material based on thermoplastic elastomers – dispenses entirely with PVC and phthalates or plasticizers classified as harmful. Developed on the basis of the know-how concerning PVC-free solutions collated in the areas of crown corks, aluminium seals and bandguard, PROVALIN® complies with all of the requisite requirements governing glass as a packaging material. Jars are easy to open and can be closed again.
They can withstand high stacking pressure and fluctuating temperatures. Meanwhile, the PVC-free PROVALIN® sealant compound is available for all types of food packaged hot or cold, including those types which are subsequently heat-treated, pasteurized or sterilised. Since the initial pilot tests with PVC-free seals many companies, successively converted their ranges. This is acknowledged by retailers and consumers alike. The summary after four years of PVC-free lid seals is exceedingly positive.
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