Abstract
There is a correlation between the radial stress and the adhesive force of a wound roll in an industrial scale roll-to-roll manufacturing system. The system considered in this study is used for the fabrication of wide-width (2235 mm) adhesive film of 30 μm thickness. This manufactured adhesive film is used for protection in one manufacturing step of a liquid crystal display line. The radial stress, which is measured in this study using force sensitive resistor sensors, is a major factor influencing the degradation of adhesive force. The adhesive forces were measured based on the tape method with the direct pull-off test. It is confirmed that the radial stress has an inversely proportional effect on the adhesive forces of the film. To improve the resulting adhesive value of the film, adjustments to operating tension and taper value are employed. Statistical analysis shows that low tension conditions result in less adhesive deviation, and that low taper values at high tensions can reduce the deviation of adhesive forces. The tension control guidelines contribute to an improvement in mass production of roll type adhesive film products used in displays and other applications.
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Abbreviations
- σ w :
-
web stress in winding
- σ 0 :
-
initial web stress
- taper :
-
decrement of the taper tension
- r :
-
dimensionless roll radius ratio (i.e., the radius divided the core radius)
- R :
-
current radius of the roll
- ψ :
-
volume of adhesive tape lost
- k w :
-
coefficient of the adhesive tape
- F L :
-
total load normal to the adhesive tape
- ν :
-
distance the adhesive is dragged across the substrate surface
- H :
-
hardness of the adhesive tape
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Park, J., Lee, C. Effect of Radial Stress on the Adhesive Force of a Wound Roll in Industrial Roll-to-Roll Manufacturing System. Int. J. Precis. Eng. Manuf. 19, 411–415 (2018). https://doi.org/10.1007/s12541-018-0049-4
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DOI: https://doi.org/10.1007/s12541-018-0049-4