A neck-in model in extrusion lamination process

Seiji Shiromoto, Yasushi Masutani, Masaaki Tsutsubuchi, Yoshiaki Togawa, Toshihisa Kajiwara

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


In this study, the experiment of the extrusion lamination process using high-pressure process low-density polyethylene (LDPE) was performed. The nonisothermal viscoelastic simulation of the extrusion lamination experiment was also carried out. The simulation results were in good agreement with the experimental data within wide range of take up velocity and air gap length. We developed the theoretical model based on force balance and deformation type of a film to predict the neck-in behavior in the extrusion lamination or cast film process. It was suggested from the neck-in model that the neck-in correlates with the ratio of planar to uniaxial elongational viscosity. It was confirmed that the neck-in model could predict the film edge shape and neck-in properly for conventional LDPE.

Original languageEnglish
Pages (from-to)22-31
Number of pages10
JournalPolymer Engineering and Science
Issue number1
Publication statusPublished - Jan 2010

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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