The production process of Terni Polimeri consists of the following phases:
All incoming materials are subjected to analysis by the internal laboratory which verifies the compatibility of the goods with the orders and certifies the mechanical and chemical-physical reference parameters of the raw materials.
The tests that are carried out are:
- Systematic sampling of samples;
- Specimen molding in accordance with;
- DSC analysis to highlight the presence of all polymers;
- MFI analysis to highlight the degree of injectability;
- IZOD resilience analysis;
- VICAT grade analysis;
- Dynamometer analysis (breaking load – percentage elongation – flexural modulus of elasticity, etc.);
- In-muffle analysis of the mineral filler quantity.
Based on the product expected by the customer, a formulation is produced that will be launched in production only after verification of economic compatibility and compliance with the expected physical, chemical and mechanical characteristics.
The mixing of the raw materials is carried out in Silos – mechanical mixers in order to obtain basic products with homogeneous characteristics. The products are transferred to the loading hoppers by vacuum suction systems
The gravimetric dosing systems dose and make the polymers, pigments and additives flow continuously into the extrusion cylinder, the mineral fillers are dosed and inserted through lateral introducers, in areas of the cylinder where the polymers have already reached the fusion.
In the extruder both due to the effect of thermal energy, conferred through the electric resistances, and due to the mechanical energy conferred through the extrusion screws, the formulation is brought to fusion and the plasticization of the compound is carried out.
The material, due to the pressure exerted by the extrusion screws, passes through a filtration system and a supply chain, taking the form of spaghetti, which, invested by a stream of cold water and by rotating blades, take the form of granules. Water has the function of cooling and transport to a centrifuge, where the product is dried quickly.
The final mixing of the finished product is always carried out in silos-mixers and allows obtaining homogeneous production lots.
The material, after the vibrating process, flows back into a final mixing silo which has the function of making the production batch homogeneous before certification. The material after being mixed again is packed in big bags.
The production is tested in the laboratory and is characterized by a certificate that guarantees its characteristics.
The transport to the silos takes place by pneumatic means, the packaging mainly in bigbag on the platform, protected by a polyethylene membrane, able to contain up to 1.5 tons of material.
Exceptionally the product is packaged by a bagging machine in 25 kg bags. on the platform.