The sealed rollers are used as a kind of accumulator as a volume of paper is rolled up in each strand and this paper is rolled out right afterwards in the rewinder. So, its function is to be a lung for the transition from a continuous process to a discontinuous process, which is the operation of rewinders.
Waterproof rollers are manufactured differently when used for toilet tissue, because in this case the paper is rolled over tubes and the stanchion is placed inside the tube, needing adequate machines to insert and remove the caps from inside the tubes. In other papers, they are rolled directly onto the roll, which may or may not be coated with rubber, although faster machines the normal is coated.
We manufacture waterproof rollers for all uses, designed for manufacturing process efforts, with coupling gloves or not, with bearings suitable for use.