The middle layer of the paper tape carrier base paper is very important. It should not only ensure a good combination with the surface and bottom layer, but also have a certain softness, loose thickness and resilience, so as to minimize the damage of mechanical vibration to electronic components during transportation.

The intermediate layer is also made of kraft softwood pulp and hardwood pulp, appropriately increasing the proportion of hardwood pulp and reducing the amount of chemicals to improve the softness of the paper. A softener of 0.5% ~ 1.5% relative to the absolute dry pulp, such as polysiloxane quaternary ammonium salt, polysiloxane phospholipid, fatty acid alkoxy compound, etc., can be added to make the softness reach 100 ~ 150MN