The fire happened at a factory between Phoenix Parkway and Bangrave Road in Corby.
At its height there were ten pumps in attendance and it's believed fire fighters will be on the scene for the rest of the day and into tomorrow.
No-one is thought to have been injured in the blaze.
It's unclear at this time what caused the fire.
More top news
Four individuals who were caught by police leaving a pub after celebrating a robbery they committed, have been jailed.
A haulage firm owner from Leicestershire says he expects the migrants crisis in Calais to be a problem for years to come.
Some showers, although many places will stay dry.