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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
  • 42 Downloads

Abstract

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.

Keywords

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

Abbreviations

R

Maximum radius ratio

Rw

Radius of wound roll

Rc

Radius of core

r

Variable on the radius ratio (= Rw/Rc)

εrr

Radial direction strain

εrr*

Residual strain in radial direction

u

Displacement in radial direction

u*

Displacement in radial direction by residual stress

εθθ

Hoop strain

εθθ*

Hoop strain due to residual stress

εθθ,b

Hoop strain due to bending stress

εθθ,b*

Hoop direction residual strain due to bending stress

ub

Displacement in the radial direction by bending stress

ub*

Residual displacement in radial direction by bending stress

σw

Winding stress

σrr

Radial stress

σR

Radial stress in core

σθθ

Hoop stress

ρ

Density of wound material

g

Acceleration due to gravity

τ

Angle between direction of radial stress and direction of gravitational force

S

Speed of substrate

D

Differential operator (= r(d/dr))

σ*

Residual stress

σg*

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

γ

Constant in σ g *

ν

Poisson’s ratio of wound material

Ec

Elastic modulus of core

sij

Compliance of wound material

µ

Friction coefficient between wound layers

W

Work done by the force of friction

V

Total volume of adhesive layer loss

K

Dimensionless constant

N

Total normal load

L

Sliding distance

Arr

Area in which radial stress was applied to the wound roll

H

Hardness of the softest contacting surfaces

Taper

Taper value

Tlinear

Linear taper tension profile

Thyperbolic

Hyperbolic taper tension profile

Notes

Acknowledgements

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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