Satatuote uses plastic film manufactured with the extrusion technique in its production, which is based on thermoforming technology. The grades of plastic most often used are PET, PS and PP. The quality of the raw materials used in these grades is ensured by our selected suppliers.
PET (polyethyleneterephtalate) is made from ethylene and terephtalic acid. There are two main types of PET material, amorphous PET (APET) and crystallized PET (CPET). With a working temperature of -40°C / +70°C, APET offers an excellent barrier against acid, water, CO2 and nitrogen, thanks to its viscosity and high density. The structure of the material also enables a transparency close to that of glass, giving high visibility of the product within the APET packaging.
The rPET film used by Satatuote corresponds in its mechanical characteristics to APET film, and the middle layer of the film contains at least 50% recycled PET material. The purity of the surface layers guarantees the suitability of the packaging for foodstuffs. There is a range of colors to choose from.
The packaging, trays and containers made from APET materials can be recycled by granulating and manufacturing new film. If necessary the packaging can be disposed of by energy-efficient incineration, whereupon components of CO2, H2O and CO are freed against the energy obtained, and small amounts of ash are formed.
PS (polystyrene) is made from styrene, which is a mixture of GPPS (General Purpose PS) and HIPS (High Impact PS) materials. Being very brittle, pure GPPS material offers a glass-like clearness. HIPS also contains butadiene rubber, giving the material a softness, impact resistance and grease resistance, which is important for the packaging of foodstuffs. The operating temperature of PS is -40°C / +85°C. There is a choice of colors.
The packaging, trays and containers made from PS materials can be recycled by granulating, and new film can be manufactured. If necessary the packaging can be disposed of by burning, whereupon components of CO2, H2O and CO are freed against the energy obtained, and very small amounts of by-products are formed.
PP (polypropene) is typically a mixture of homopolymers (Ho-PP) and copolymers (Co-PP), the former being manufactured from propylene and the latter from propylene and small amounts of ethylene. It is possible to reinforce – according to requirements, and case by case – the clearness of the homopolymer film or the milky effect of the copolymer by adjusting the mixing ratio. In addition, the homopolymer is more rigid than the copolymer, which in turn is softer and thereby has a higher impact resistance. The working temperatures are Ho-PP +2°C / +121°C and Co-PP –40°C / +121°C. There are a number of colors to choose from. Packaging made from PP is microwave-ovenproof, and containers made from copolymers also withstand freezing. Additionally, PP material offers an excellent barrier to steam.
The packaging, trays and containers made from PP materials can be recycled by granulating and new film can be manufactured. If necessary the packaging can be disposed of by burning, whereupon components of CO2, H2O and CO are freed against the energy obtained, and very small amounts of by-products are formed.
Biodegradable polymers can be divided into two groups - synthetic polymers and natural polymers. The majority of synthetic polymers are polyesters, of which the most important are polyactides (PLA), which are based on natural raw materials. The film produced from these is transparent and brittle. Biodegradable plastic film is made from renewable raw materials such as maize, cellulose and sugar cane. Satatuote is actively involved in monitoring the development of commercially exploitable, biodegradable plastics, and we have also carried out various pilot runs on materials for our customers’ testing needs.