Many different food and drink products need to be hot-filled to ensure a long shelf-life in their packaging (glass or PET). RESILUX has a long experience with hotfill PET preforms and bottles. Until now, we have focused on beverages and sauces (juice, ice-tea, flavoured water, sport drinks, ketchup, etc..) which are filled up to a temperature of 85°C.
As PET is a thermoplastic polymer with a glass-transition temperature of approximately 70°C, it is important to use specific techniques to avoid deformations during and after filling and storage. These techniques include: special hotfill resin, special finish design, dedicated blowing machines and moulds. In addition to these specific techniques, RESILUX is working with world-leading producers of hotfill caps and hot-filling blowing and filling machines in order to offer our customers state-of-the-art preforms and bottles for their hotfill application. Thanks to this co-operation, we are not only producing the classic bottles with vacuum panels but also panel-free and lightweight nitrogen hot-fillable PET bottles.
Although there is general decline in refilling in most parts of the world, RESILUX remains a strong name in this field. Beverage companies bring refillable PET bottles, which are temporally stored at retailers, back to their plants and they deliver new products to the retail store. In the refilling plant, the bottles are washed inside and out at 60°C for 15 minutes. These bottles pass a sniffer and a X-ray check, which can make sure that the bottles are clean and intact. If any bottles are scuffed too much or too damaged, they are then sorted out of the process. Because of this cleaning process at a higher temperature, these PET bottles are specially designed, produced with special PET resins and blown via a special blowing process. Usually the refillable PET bottle is refilled approximately 20 times (the average rate of re-use is 3.3 times a year). Although a refillable container initially costs the bottler more than its one-way counterpart, the cost-per-filling of the refillable container is less.
Natural and artificial light alike can affect dairy product quality, especially long-life milk and yoghurt, but also soya drinks. Light exposure causes chemical reactions that can modify the proteins and fats in these products, damaging flavour and vitamin content.
Since its foundation, the production of PET (polyethylene terephthalate) preforms and bottles has been the core business of RESILUX. The preforms are blown into bottles by RESILUX or by the customer and then filled with water, soft drinks, edible oils, ketchup, detergents, milk, beer, fruit juices, etc. The distinctive characteristic of the Belgian company is the high quality of the products and reliability of supply.