Paste extrusion of polytetrafluoroethylene (PTFE) powders through tubular and annular dies at high reduction ratios
Bibliographic record
Abstract
Abstract Paste extrusion experiments are reported for three different polytetrafluoroethylene (PTFE) fine powders using both capillary and annular dies having a high reduction ratio (cross‐sectional area of reservoir to cross‐sectional area of die at the exit) varied from 1000 up to 4000. The extrusion pressure is reported as a function of the apparent shear rate for various resins and dies. The approximate mathematical model for paste extrusion through capillary dies developed by Ariawan et al. (Ariawan et al., Can Chem Eng J, 2002, 80, 1153) was used to describe the experimental data by best fitting the five material constants of the constitutive model. Using these constants, the model developed by Patil et al. (Patil et al., AIChE J., 2006, 52, 4028) was used to predict the extrusion pressure for all three resins in annular dies. The model predictions are found to be consistent with experimental results and the analogy between the rod and tube extrusion models is demonstrated. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".