Taper Tension Profile in Roll-to-Roll Rewinder: Improving Adhesive Force of Pressure-Sensitive Adhesive Film

  • Jongsu Lee
  • Seongyong Kim
  • Changwoo LeeEmail author
Regular Paper


The roll-to-roll adhesive film manufacturing process has been widely used in the field of composite film manufacture. Thus far, many research groups have reported on the variation in characteristics of pressure sensitive adhesive film according to application environment characteristics, such as temperature and external forces, failure mechanism, and structures that improve the adhesive force of the film. However, there are few studies that analyze the effects of the manufacturing process conditions on the quality of the adhesive film. In this study, we find that hoop stresses due to winding tension may cause a decrease in the quality of the adhesive layer by generating wear on its surface. Moreover, radial and hoop stresses in the wound film affect the degree of wear. This suggests that the operating conditions of the film manufacturing machine affect the quality of the pressure sensitive adhesive (PSA) film, as do the properties of the film and the environment. To improve the adhesive force of PSA film, we applied two taper tension profiles that determine the distribution of the tension applied to the winding PSA film with respect to the wound ratio, followed by experimental verification of the effects of winding.


Roll-to-roll Winding Radial stress Adhesive force Taper tension profile 



Maximum radius ratio


Radius of wound roll


Radius of core


Variable on the radius ratio (= Rw/Rc)


Radial direction strain


Residual strain in radial direction


Displacement in radial direction


Displacement in radial direction by residual stress


Hoop strain


Hoop strain due to residual stress


Hoop strain due to bending stress


Hoop direction residual strain due to bending stress


Displacement in the radial direction by bending stress


Residual displacement in radial direction by bending stress


Winding stress


Radial stress


Radial stress in core


Hoop stress


Density of wound material


Acceleration due to gravity


Angle between direction of radial stress and direction of gravitational force


Speed of substrate


Differential operator (= r(d/dr))


Residual stress


Sum of residual stress and the gravitational term related to radial stress


Constant in σ g *


Poisson’s ratio of wound material


Elastic modulus of core


Compliance of wound material


Friction coefficient between wound layers


Work done by the force of friction


Total volume of adhesive layer loss


Dimensionless constant


Total normal load


Sliding distance


Area in which radial stress was applied to the wound roll


Hardness of the softest contacting surfaces


Taper value


Linear taper tension profile


Hyperbolic taper tension profile



This research was supported by the National Research Foundation of Korea (NRF-2017R1A1A1A05001027).


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Copyright information

© Korean Society for Precision Engineering 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringKonkuk UniversitySeoulSouth Korea
  2. 2.Department of Mechanical EngineeringChangwon National UniversityChangwon-siSouth Korea

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