How to choose the spoke core of winding films or types or various metal foil? 

3inch ABS core, 6inch ABS core, 8inch ABS core, 10inch ABS core

ID 3inch with OD 6inch,ID 3inch with OD 8inch,,ID 3inch with OD 10inch.

3inch PE core, 6inch PE core, 8inch PE core, 10inch PE core
....

With the increasing requirements of customers for winding film.The accuracy of products (including straightness, roundness, etc.).
So what is the relationship between the accuracy of products and the quality of winding?
Every customer who has used the plastic core can obviously see that the deviation of straightness or roundness is large,also the size consistency of ID and OD is poor,when is actual roll-up.It can be clearly seen from the run out test that the tube core with small dimensional accuracy will be very stable,and it up and down runout is almost invisible to the naked eye. However, the core with inaccurate size can be very obvious You will know that the amplitude of the beat is very large. Therefore, the accuracy of the core affects the winding efficiency and yield to a great extent.