The plastic industry is divided into two major sectors. The first sector comprises the raw material suppliers who manufacture polymers and moulding compounds from intermediates which they may also have produced themselves. In invested capital this is usually the largest sectors. The sector is made up of processors who convert the raw materials into saleable items using different processes such as extrusion and injection moulding. Other include machinery manufacturers who supply equipment to the processors and suppliers of particular specific additives for use within the industry.