In Napag we are diversifying into sourcing, supplying and marketing of petrochemical products in those specific markets where we have experience and enough knowledge to provide a value-added service to our customers. We aim to provide a satisfying customer service, which often includes the transport and the delivery of good.
It usually refers to benzene derivatives. The term was coined as such simply because many of the compounds have a sweet or pleasant odour. The configuration of six carbon atoms in aromatic compounds is known as a benzene ring, after the simplest possible such hydrocarbon, benzene. Nevertheless, many non-benzene aromatic compounds exist.
Polymers are classified in four groups, based on their network structure: thermoplastics, elastomers, duromers and thermoplastic elastomers (TPEs). Thermoplastics consist of long linear one-dimensional polymer chains that are held together by weak physical forces such as intermolecular interactions. When exposed to heat or shear forces, they become free flowing and formable. When cooled down, the material becomes again rigid. As this process is purely physical, it can be repeated at any time and as often as necessary (example: polypropylene). Duromers are tightly cross-linked polymers that do not melt under high temperature and retain their network structure. At room temperature, they are hard and brittle (example: epoxy resin). Elastomers, often referred to as rubbers, are chemically cross-linked and extremely elastic. They are not formable after vulcanisation. The material can be temporarily deformed by compression and stress forces and returns to its original structure as soon as the forces are no more applied (example: NR). Thermoplastic elastomers consist of thermoplastic end blocks (e.g. polystyrene) and an elastic midblock (e.g. ethylene-butylene). This makes the material free flowing and formable. When the material is cooled down, physical cross-links are established, which bond the elastic blocks into rigid three-dimensional networks. Thermoplastic elastomers thus have the properties of elastomers but can be processed in the same way as thermoplastics.
The main polymers that we can supply are:
- Polyethylene (PE)
- Polystyrene (PS)
- Polypropylene (PP)
- Acrylonitrile butadiene styrene (ABS)
- Polyvinyl chloride (PVC)
- Polyethylene terephthalate (PET)
A fertilizer is any material of natural or synthetic origin (other than liming materials) that is applied to soils or to plant tissues (usually leaves) to supply one or more plant nutrients essential to the growth of plants.
The importance of fertilizers in raising soil fertility is well known. Fertilizers, indeed, are one of the main factors behind the important increases achieved in average crop yelds in European countries over the past decades.