The SJ series Mini Film Blowing Machine (SJ-40, SJ-45, SJ-50) is designed for stable and efficient production of plastic films in small to medium-scale manufacturing environments.
This Mini Film Blowing Machine is widely used for LDPE, HDPE, and LLDPE film production, including shopping bags, packaging film, garbage bags, and agricultural film applications.
Key Advantages
Stable Alloy Steel Extrusion System
The screw, barrel, and extruder components are made of high-quality alloy steel. After nitriding (desalination treatment) and precision machining, the system provides:
- High hardness and wear resistance
- Strong corrosion resistance
- Stable plasticizing performance under continuous operation
Reliable Production Performance
- Uniform film thickness control
- Stable extrusion output
- Smooth and consistent film surface quality
Compact Industrial Design
The SJ series Mini Film Blowing Machine is designed for space-saving installation, suitable for:
- Small factories
- Start-up production workshops
- Limited-space industrial environments
Application Scope
The machine is suitable for producing:
Shopping bags (T-shirt / vest bags)
Food packaging film
Industrial wrapping film
Garbage bags
Agricultural film and mulch film
Compatible materials:
LDPE
HDPE
LLDPE
Some biodegradable film materials (depending on formulation)
Technical Parameters
SJ-45 Mini Film Blowing Machine
|
Item |
Specification |
|
Model |
SJ45 |
|
Screw diameter |
Φ45 |
|
Screw L/D ratio |
28:1 |
|
Screw speed |
15–100 r/min |
|
Main motor power |
7.5 kW (6-pole) |
|
Extrusion output (single) |
25 kg/h |
|
Die size |
Φ50 |
|
Film thickness (single side) |
0.008–0.08 mm |
|
Max film folding width |
400 mm |
|
Total electric capacity |
18 kW |
|
Overall dimension |
2400 × 2100 × 2800 mm |
|
Machine weight |
1.8 T |
SJ-50 Mini Film Blowing Machine
|
Item |
Specification |
|
Model |
SJ50 |
|
Screw diameter |
Φ50 |
|
Screw L/D ratio |
28:1 |
|
Screw speed |
15–100 r/min |
|
Main motor power |
11 kW (6-pole) |
|
Extrusion output (single) |
30 kg/h |
|
Die size |
Φ60 |
|
Film thickness (single side) |
0.008–0.08 mm |
|
Max film folding width |
500 mm |
|
Total electric capacity |
24 kW |
|
Overall dimension |
2500 × 2150 × 2800 mm |
|
Machine weight |
2.2 T |
Working Principle
The Mini Film Blowing Machine SJ series operates through a standard extrusion film process:
Plastic pellets are fed into the extruder
Screw rotates and melts material uniformly
Molten plastic is pushed through the die head
Air inflation forms film bubble
Cooling system stabilizes film thickness
Haul-off unit pulls and winds finished film
Screw & Plasticizing Technology
The SJ series adopts a 28:1 L/D optimized screw design, ensuring:
Stable melting of LDPE / HDPE materials
Reduced thermal degradation of raw materials
Improved film transparency and tensile strength
For biodegradable materials (PLA / PBAT blends), screw configuration can be adjusted to improve thermal stability during processing.
Electrical System & Components
To ensure industrial reliability, key components can be configured with internationally recognized brands:
- Main motor: Siemens / ABB (optional)
- Inverter: Delta (stable speed control & energy saving)
- Temperature controller: Omron digital system
- Heating system: High-efficiency stainless steel heater rings
Pre-Shipment Quality Testing
Each Mini Film Blowing Machine is tested before delivery under real production conditions:
- 72-hour continuous operation test
- Film thickness uniformity verification
- Electrical load stability inspection
- Full machine running video provided for buyer confirmation
Industry Applications
The SJ series is widely used in:
- Plastic packaging factories
- Film extrusion workshops
- Small to medium bag manufacturing plants
- Export-oriented packaging producers
Packaging
Export standard wooden case packaging
Anti-rust oil protection before shipment
FAQ
Q: What is the MOQ for the Mini Film Blowing Machine?
A: MOQ is 1 set.
Q: Can the machine voltage be customized?
A: Yes, voltage can be customized to 220V / 380V / 415V / 440V, 50Hz or 60Hz.
Q: Do you support OEM or customization?
A: Yes, we support customization of screw, die head, film width, and production capacity.
Q: What payment terms are available?
A: T/T, L/C at sight, and Alibaba Trade Assurance.
Q: What trade terms do you support?
A: EXW, FOB, CIF, CFR.
Q: What is the delivery time?
A: 20–30 working days after deposit confirmation.
Q: What is the warranty period?
A: 12 months warranty for manufacturing defects.
Q: Do you provide spare parts?
A: Yes, we provide a standard spare parts kit including heater rings, thermocouples, and sensors.
Q: What happens after warranty?
A: Lifetime technical support and original spare parts supply at factory price.
Q: Can it produce biodegradable film?
A: Yes, depending on raw material formulation and processing conditions.
Hot Tags: mini film blowing machine, China mini film blowing machine suppliers
