Thermoform scrapless

Dow s patented scrapless forming process is identified as the SFP process. An extruder produce a biaxially oriented sheet (Chapter 5). In turn the sheet is slit and cut into square blanks. These blanks are heated and pressed into circular disc with a lip. Immediately or latter after reheating, the disc is thermoformed into a shape such as a cup. 

Figure 11. Coextruded sheet and container formed via scrapless thermoforming process.

Figure 10.10 Scrapless thermoforming (reprinted with permission from [1])...

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