Duct tape is with grease surface. It is made of polyethylene coated cloth and hot melt adhesive, can be tear easily by hand. Mainly used for carton sealing, duct wrapping, wall painting covering ect. 

Backing: polyethylene coated cloth 
Adhesive: hot melt adhesive / natural rubber adhesive 
Option: 27 / 35 / 50 / 70 mesh 
Color: silver / black / white / red / yellow / green / blue / pink / orange etc