Differences between single-screw and twin-screw blown film machines

Advantages of single-screw blown film machine：

1.Low equipment cost: Single-screw blown film machines have a simple structure, resulting in relatively low equipment purchase and maintenance costs.

2.Easy operation: Convenient and easy to learn, suitable for large-scale production of general-purpose films such as packaging films and agricultural mulch films.

3.Low shear protection: For materials with low melt viscosity and good thermal stability (such as LDPE), the single screw achieves melt homogenization through the compression section, avoiding excessive shear that could lead to molecular chain breakage and protecting the film's toughness.

4.Good economic efficiency: Suitable for high-volume (>1000 kg/h) production of general-purpose films, such as PE cling film and HDPE shopping bags, with lower energy consumption per ton compared to twin-screw extruders.

However, single-screw blown film machines also have disadvantages such as limited mixing effect, weak degassing capacity, and narrow process adaptability.

Compared with single-screw blown film machines, twin-screw blown film machines offer advantages such as high-efficiency mixing, precise venting, controllable shearing, and wide process adaptability.However, its disadvantages include high equipment cost, high operation difficulty, high energy consumption, and limited material adaptability.

In conclusion, purchase according to your needs.