Invision® resins are based on enhanced polyolefin compositions that have been specifically designed to provide high melt strength for sheet and profile extrusion, and thermoforming applications. Sheet products produced with Invision resins may consist of smooth or textured surfaces, in low or high gloss, and in mono and multilayer sheet structures. Although many of the practices and equipment used in extruding sheet produced with other resins apply to extruding sheet produced with Invision resins, provided are general start-up conditions and points of consideration more specific to Invision resins. Consult with your representative for further detailed information regarding equipment design, regrind usage, and potential sheet structures which can be extruded using Invision enhanced polyolefin resin technology.
| PARAMETER | VALUE | ||||||
| TPO Resins | Color and Cap Resins | Color Concentrates | |||||
| Drying | |||||||
| Time (hours) | 4 - 8 | 4 - 8 | 4 - 8 | ||||
| Temperature, °F (°C) | 160 -180 (70 - 80) | 160 -180 (70 - 80) | 120 - 160 (50 - 70) | ||||
| Dew Point, Maximum, °F (°C) | -40 (-40) | -40 (-40) | -40 (-40) | ||||
| Maximum Moisture %, (ppm) | 0.02 (200) | 0.02 (200) | 0.05 (500) | ||||
| Screen Pack | |||||||
| Mesh | As Needed | As Needed | |||||
| Temperatures | |||||||
| Melt Temperature, °F (°C) | 390-450 (200-230) | 390-450 (200-233) | |||||
| Typical Barrel Temperatures | |||||||
| Feed Throat, °F (°C) | 70-100 (20-40) | 70-100 (20-40) | |||||
| Rear Zone (Hopper), °F (°C) | 345-410 (175-210) | 345-410 (175-210) | |||||
| Intermediate Zones, °F (°C) | 360-430 (180-220) | 360-430 (180-220) | |||||
| Front Zone, °F (°C) | 390-450 (200-230) | 390-450 (200-230) | |||||
| Screen Changer/Adaptor | 390-450 (200-230) | 390-450 (200-230) | |||||
| Feed tubes | 390-450 (200-230) | 390-450 (200-230) | |||||
| Feed block | 390-450 (200-230) | 390-450 (200-230) | |||||
| Die Temperature, °F (°C) | 390-450 (200-230) | 390-450 (200-230) | |||||
| Chill Roll Temperature, °F (°C) | 140-200 (60-95) | 140-200 (60-95) | |||||
| Pressure | |||||||
| Head Pressure psi (bar) | 1,500-3,500 (100-240) | 1,500-3,500 (100-240) | |||||
| Roll stack, pli (KN/m) | 800 pli minimum (140) | 800 pli minimum (140) | |||||
| Die and Roll Stack Settings | |||||||
| Die Gap | 0 - 20% Greater than targeted sheet thickness | ||||||
| Die Lip to First Nip | Minimize Distance | ||||||
| Die and Roll Stack Settings | |||||||
| Trim speed ratio, % | -1.5 to -2.0 | ||||||
| Edge Trimming and Cutting | |||||||
| Suggested Edge Trim Method | Razor Knives | ||||||
| Suggested Cut off Method | Traveling Shear | ||||||
