In the daily rolling shutter using, there is big noise. The noise normally is from your roller shutters sliding from bottom to top. Now we have one type rolling shutter rails with the rubber seals online and by this way, it can make the anti noise rail. Here is some drawing profile for your reference.
For the hydraulic shearing, it is good for safety but there will be some wasted coil. And the shape will change a little bit. For the disk shearing, there will be some big noise when shearing but it is cost a little lower and the working speed will be a little faster. But you can choose according to your own design.
Together with this profile, the following profile as the shutter bottom slat is also popular also.
