What is the Similarity and Difference Between Blown Film Extrusion and Extrusion Blow Molding?

What is blown film extrusion？

Blown film extrusion is a processing technology that uses an extruder to melt plastic particles or granular materials and then passes them through a mold to form a film. During the blown film extrusion process, plastic particles are put into the feeding system of the extruder. After melting, they are pushed forward by the screw in the extruder barrel, and form the required film through the specific die holes in the machine head. shape. After the film is formed, it enters the cooling system for cooling and solidification, and is finally rolled up through the winding device.

Blown film extrusion is a common plastic processing technology, usually used to produce plastic bags, cling film, agricultural covering film, construction film and other film products. This process has the advantages of high production efficiency and low production cost, so it is widely used in the packaging industry and agricultural fields.

What are the advantages of blown film extrusion?

Blown film extrusion, as a common plastic processing process, has many advantages, including:

1. High production efficiency:

Blown film extrusion adopts a continuous production process, which can achieve high-speed production and improve production efficiency.

2. Low production cost:

Compared with other processing methods, the production cost of blown film extrusion is lower because the process can complete multiple steps on a single equipment, reducing production costs.

3. Stable product quality:

Blown film extrusion can achieve precise control and adjustment to produce film products with stable quality and good uniformity and mechanical properties.

4. Strong plasticity:

Blown film extrusion can produce film products of different materials, thicknesses and widths. It has strong plasticity and is suitable for a variety of application fields.

5. Environmental protection and energy saving:

There is no need to use solvents during the blown film extrusion process, which reduces environmental pollution; at the same time, this process can realize resource recycling by recycling and reusing waste materials, which meets environmental protection requirements.

6. Wide range of applications:

Blown film extrusion can produce various plastic film products, such as packaging bags, cling film, agricultural covering films, etc., which are widely used in packaging, agriculture, construction and other fields.

In general, blown film extrusion has the advantages of high production efficiency, low production cost, stable product quality, strong plasticity, environmental protection and energy saving, and wide application range. It is a widely used plastic processing technology.

Blown Film Extrusion VS Extrusion Blow Molding

Blown film extrusion and extrusion blow molding are both commonly used processes in plastic processing. They have some similarities and differences:

Same point:

1. The principles are basically the same: blown film extrusion and extrusion blow molding both use an extruder to melt the plastic and then form the desired product through the mold.
2. All require plastic particles or granular materials as raw materials.
3. All require processing under high temperature and high pressure conditions.

Key Difference Between Blown Film Extrusion and Extrusion Blow Molding:

1. Different product forms:

Blown film extrusion mainly produces films, while extrusion blow molding mainly produces hollow plastic products, such as bottles, containers, etc.

2. Different process steps:

blown film extrusion includes extrusion, cooling and winding steps; extrusion blow molding includes extrusion, blow molding and cooling steps.

3. Different equipment:

The blown film extruder mainly includes the extruder, die head and cooling system; while the extrusion blow molding machine includes the extruder, mold and blowing device.

4. Product uses are different:

blown film extruded products are mainly used in the packaging industry, such as plastic bags, cling film, etc.; extrusion blow molded products are mainly used in the production of hollow containers in food, medicine, chemical industry and other fields.

In general, blown film extrusion and extrusion blow molding have some similarities in principles and processing processes, but due to different product forms and uses, there are also major differences in their process steps, equipment and application fields.