Why You Should Use Twin Screw Extruder ?
The introduction of twin screw extruder into sheet/film production is a revolutionary break. For many products, the noticeable advantages in technical and cost containment have been making twin screw extruder a trend in sheet/film production. Not only has it enhanced competitiveness, but made contribution for environment.
Generally speaking twin screw extruder direct extrusion has following benefits:
- More energy-saving
for many products twin screw direct extrusion technology turns two-step process into one-step so that the electricity consumption has been saved significantly. For some resins that requires pre-dry, direct extrusion can save electricity up to 40%.
- Higher productivity
there are productivity issues in each step of two-step process. One-step way eliminated the first step; therefore the whole productivity has been brought up.
- Smaller footprint
comparing with two-step, one-step way takes less space, saves logistic and labor turnover cost.
- Flexible recipe change
thanks to excellent mixing and dispersing performance of twin screw extruder, the recipe can be changed inline without having to make masterbatch or pre-treatment. The innovation circle time has been shortened dramatically.
- Save more additives
generally speaking, comparing with single screw extruder, some additives like flame retardant can be saved up to 20%.
- Better quality end products
due to its excellent mixing and dispersing performance of twin screw extruder, all sorts of additives can be distributed evenly into the products. Pairing with flexible and potent vacuum degassing system, most of the low molecular particles can be removed from the molten polymer and thus the inner quality has been raised.
- More accurate control in RTD
for some resins, RTD (residence time distribution) is a very critical factor related to quality. Modular design and the nature of self-wiping of twin screw extruder can help control RTD by changing screw profile.
- Wider tolerance in raw materials
comparing with single screw extruder, twin screw extruder has inimitable advantage in raw material adaptability. Thanks to its born self-wiping performance, twin screw extruder is able to intake pellets, powder, flakes, films and yarns without problem.
