Working Principle & Features RENDER’S offer to our clients superior range of sigma kneader machinery equipment. Our product is suitable for kneading, dispersing and mixing of highly viscous material. It is mostly used in the chemical, pharmaceutical, food, adhesives, dyestuff, paint, refractory, rubber, plastic and related industries. They comprise of a double u shaped container welded and machined together. We have kept the clearance between the blades and the walls of the container to the minimum for ensuring maximum efficiency in the kneading and mixing action.