| 摘要 |
A thermoforming window of a rectangular sheet of a thermoplastic material is determined by calculating its Sag Number during heating. The Sag Number is a function of the sheets length (L), width (W) and apex depth (h) at the center of sag. Upon the Sag Number being between 10 and 40, preferably 15 and 35, and more preferably 19 and 28, the sheet is ready for forming into an end product. |
