- Conference date: 13-17 June 2004
- Location: Columbus, Ohio (USA)
Bowing phenomenon throughout tenter is observed with successive biaxial stretching. This bowing phenomenon causes the unevenness of the properties in the transverse direction of film. Decreasing bowing phenomenon is one of principal technical problems under film processing and it is considered that necessity of this will go up still more in future. We have analyzed bowing phenomenon for amorphous cyclo‐olefin‐polymer (COP) film with practical processing conditions by finite element method (FEM). Considerably good agreement between analytical and experimental results was obtained under constant temperature. Furthermore we have considered temperature distribution in analysis of bowing phenomenon on the postulation that the film is heterogeneous anisotropic by making material constants which indicate mechanical characteristics of film a function of temperature. Temperature was distributed compulsorily to machine direction (MD). From the results, the following conclusions were obtained. Temperature distribution in MD strongly influences bowing phenomenon. Temperature distribution in stretching zone influences longitudinal force.
- Finite element methods
- Materials analysis
- Materials properties
- Mechanical properties
Data & Media loading...
Article metrics loading...