A series of experimental runs were carried out on a small blown film line to investigate the effect of processing parameters on the mechanical properties of the film that was produced. Three different dies were used and for each die the throughput (mass flow rate), freeze line height and blow-up ratio were varied, with take-up velocity adjusted to give a fixed nominal gauge (film thickness). On...

Sheet and film processes are prevalent in the chemical and pulp and paper industries, and include paper coating, polymer film extrusion, and papermaking. A model predictive control algorithm is developed which is based on an off-line singular value decomposition of the plant. The input constraints are approximated by an ellipsoid whose size is optimized on-line to reduce conservatism. The contr...

The main objective of this study was to prepare colon-specific pellets of budesonide, using pectin as film coating. Pellet cores of budesonide were prepared by extrusion / spheronization technique. Pectin, in different ratios was combined with Eudragit RS30D, Eudragit NE30D or Surelease to produce film coating. The dissolution profiles of pectin coated pellets were investigated in pH of 1.2 (2 ...

Abstract The main objective of this study was to prepare colon-specific pellets of budesonide using pectin as film coating.  Pellet cores of budesonide were prepared by extrusion / spheronization technique. Pectin, in different ratios was combined with Eudragit RS30D, Eudragit NE30D or Surelease to produce film coating. The dissolution profiles of pectin coated pellets were investigated in pH o...

To elucidate the effect of extrusion ratio in hot-extrusion on deformation behavior during compression Mg97Zn1Y2 alloy containing about 25-vol% long-period stacking ordered phase (LPSO) HCP structured ? matrix (?Mg), situ neutron diffraction measurements were performed under compressive loading using four types samples: as-cast and after hot at 623 K with ratios 5.0, 7.5 12.5. The macroscopic y...

Mg-Bi binary alloys with concentrations of 1, 3, 6, and 9 wt% Bi ternary Mg-9Bi-2.5Zn alloy were prepared by casting hot extrusion. The results show that alloying refined as-cast grains Mg the refinement efficiency is in between Al Zr. It was also found a critical value for area fraction constituent 3 2 particles seems to appear, which influences dynamic recrystallization mechanism during This ...

A two part study utilizing polyoxymethylene (POM) was undertaken to investigate a three stage process (melt-extrusion/annealing/uniaxial-stretching) (MEAUS) utilized to produce microporous films. In this report, the thermal annealing (second stage) and subsequent uniaxialstretching (third stage) results of selected POM films from two commercial resins, labeled D & F, are discussed. Specifically...

UNLABELLED Total talar extrusion is an extremely rare injury that occurs after a high-energy trauma. There are few reported cases in literature and there is no consensus as to the appropriate treatment of the extruded talus. Historically, the treatment options for open total talar dislocation have been limited to talectomy and fusion or reimplantation after thorough debridement. We report a cas...

Solution-cast coating films of perchlorate-doped oligo(3-methoxythiophene) exhibited a gold-like luster similar to that metallic gold despite the involvement no metals. However, development mechanism remains ambiguous. To understand mechanism, we performed scanning electron microscopic analysis, variable-angle spectral reflectance measurements, and ellipsometry measurements on ClO4−-doped cast ...

Recently, optical data storage has been achieved via photobleaching of a fluorescent dye in co-extruded, multilayer, polymer films. Photobleaching, the decrease in fluorescence by exposure to light, can be caused by a number of different processes, including light-induced chemical reactions and thermal degradation. Although data has successfully been written using this method, the mechanisms co...