Various hazards in polymer plants: 1. Chemicals like formaldehyde and caprolactam cause burning in eyes, nose and throat. 2. High temperature and pressure of thermic fluid may cause burn and sometimes fire 3. Extrusion machines have hot surfaces which need insulation to prevent burn injury. 4. Cutting machines for plastic , rubber and other hard substances need safety guard on cutting blade and machine drives. 5. Charging of toxic materials need enclosed system with local and room exhaust fans and necessary respirators. 6. Polyamides used to manufacture epoxy resin are skin irritant. 7. Acrylonitrile used in polyacrylonitrile fibre is toxic, skin irritant and carcinogenic. 8. Dimethyl formamide causes digestive effects, abdominal pain, skin effect and pancreatitis to workers exposed to it. 9. Styrene monomer, acetone and organic peroxide catalyst used in making polyester resins may cause fire and explosion. Styrene vapour may cause narcosis.