Nittel liners are manufactured from different types of plastics in line with specific requirements. The recommended material is determined by the type of filling product and how it is discharged or further processed. Our staff will happily advise you in the selection of the right material.
A small sample of the type of materials we offer can be found below.
Low density polyethylene (LDPE) is produced under high-pressure when ethylene gas polymerises. The material produced is extremely flexible, provides an excellent barrier to water vapour and is particularly versatile. Additives can be introduced to generate smooth, non-blocking and antistatic LDPE. This makes for better handling when inserting in the surrounding container, e.g. barrel, pail or drum.
High density polyethylene (HDPE) is produced at low pressure and is characterised by its very high density. It is more stable and more resistant to heat than LDPE and is therefore used predominantly for hot fillings at up to 100°C.
Polyamides (PA) are semi-crystalline thermoplastic polymers and characterised by a high level of stability, rigidity and toughness. They have a good chemical resistance and are used for products with a solvent content and hot fillings of up to 170°C, predominantly for round bottom liners which can be sterilised and in barrier materials.
Polypropylene (PP) is a further type of plastic. It has a higher level of rigidity, hardness and stability than polyethylene. However, it is not as rigid, hard or stable as other plastics, e.g. polyamide. PP is resistant to alcohols, organic solvents and greases. It is suitable for hot fillings of up to 125°C.
Coextrusion foils are made up of several layers of plastic, joined together in the foil’s manufacturing process. Multi-layered foils combine the different qualities of individual plastics. Polyamide, for example, contains an oxygen barrier and a chemical barrier. A foil made up of polyamide and polyethylene has the characteristics of both components.
Aluminium compound foils
Aluminium foils consist of one or more layers of polyethylene and aluminium which are combined with each other. The aluminium layer prevents water vapour from entering and stops flavourings escaping. Aluminium compound foils provide a good barrier effect and are particularly suited for hygroscopic goods.
We can offer a wide range of films which are to EU and FDA food grade standards. These include films that can be combined with some of the further specialist properties necessary for the food industry.
A range of films that comply with all levels of the pharmacopoeia regulations. The demands of the pharmaceutical industry placed upon us mean we only use films of the highest quality.
Moisture, Light & Gas Barrier
We have a great range of material which can protect your product from contamination, damage and degradation usually caused by the effects of moisture, light and gases coming into contact with the packed product. These films include aluminium laminated and EVOH based Co-Ex foils.
Conductive films are available for use when the product, container and liner need to have minimum amount of static thereby preventing risk of a spark which can be a severe health and safety issue.
When used within an appropriately earthed system our anti-static liners will ensure that any static charge does not build up to unsafe levels
We have films with a wide range of resistance to solvents including nylon based which can withstand exposure to solvents over a significant length of time.
Standard LDPE films are safe for use up to 80°C, however, when using our nylon based films the temperature resistance will rise to 180°C.