Blown Film Machine——Frequently Asked Questions (FAQ)

1. What is a blown film machine and what does it do?

A blown film machine is used to melt plastic pellets (such as PE or PP), extrude them through a die head, and form plastic film through air inflation, cooling, and winding. It is widely used for producing shopping bags, agricultural films, and packaging films.

3 Layer Blown Film Machine

2. What types of films can a blown film machine produce?

· Mono-layer film (e.g. standard PE film)

· Multi-layer co-extruded films (e.g. 3-layer, 5-layer, 7-layer composite films)

· Biodegradable films (e.g. PLA, PBAT)

· Printed film, courier bag film, agricultural mulch film, etc.

3. What raw materials can be processed?

· Commonly used materials include:

· LDPE (Low-Density Polyethylene)

· HDPE (High-Density Polyethylene)

· LLDPE (Linear Low-Density Polyethylene)

· PP, EVA, EPI, PLA, PBAT and other biodegradable materials

4. What's the difference between mono-layer and multi-layer blown film machines?

· Mono-layer: Simple structure, lower cost, suitable for basic packaging films

· Multi-layer: Combines different materials to enhance strength, barrier properties, and functionality

5. Is the machine easy to operate? Are there automation options?

Modern machines offer:

· Automatic winder & film cutting

· Temperature and thickness control

· Touch screen PLC operation

· Optional gravimetric dosing and IBC (internal bubble cooling)

6. What are common problems during operation?

· Uneven film thickness: caused by improper cooling or temperature settings

· Brittle or low-strength film: may be due to poor material or wrong parameters

· Unstable bubble: check the air pressure or die cleanliness

7. What after-sales service do Guotai&Mingyuexing Machine provide?

· Free installation and commissioning

· Operator training

· Remote technical support

· Long-term spare parts supply and optional upgrades

Let’s see How does a Blown Film Machine work?