The SJ40×2 / SJ45×2 PE Double Color Strip Film Blowing Machine is designed for manufacturers producing color stripe vest bags and shopping packaging films that require stable mass production, consistent stripe quality, and reduced processing cost.
By using a dual-masterbatch extrusion system, this machine enables direct production of striped film without printing, helping packaging factories reduce production steps while increasing product value in competitive markets.
Main Technical Parameters
|
Item |
SJ40×2-700 |
SJ45×2-900 |
|
Screw Diameter |
Φ40+40 |
Φ45+45 |
|
L/D Ratio |
28:1 |
28:1 |
|
Screw Speed |
15–100 r/min |
15–100 r/min |
|
Main Motor Power |
15 kW |
18.5 kW |
|
Output Capacity |
45 kg/h |
55 kg/h |
|
Die Diameter |
Φ80 |
Φ100 |
|
Film Thickness |
0.01–0.10 mm |
0.01–0.10 mm |
|
Max Film Width |
600 mm |
800 mm |
|
Total Power |
34 kW |
38 kW |
|
Machine Size |
3000×2500×4200 |
3500×3000×4500 |
|
Machine Weight |
2.5 T |
3.5 T |
Engineering & Structure Highlights
Dual-Screw Co-Extrusion System
The machine adopts a two-sided three-tool screw barrel design with dual masterbatch feeding, ensuring:
Stable stripe distribution during high-speed production
Reduced color deviation during long operation cycles
Consistent film appearance in mass production
Screw & Barrel
The screw and barrel are made of 38CrMoAl steel, processed with nitriding treatment and precision machining.
This ensures:
High wear resistance for continuous production
Strong corrosion resistance for masterbatch processing
Die Head System
Hard chromium plated surface
Spiral mandrel structure
Uniform melt distribution system
Result:
Stable stripe definition
Smooth film surface quality
Reduced material waste during extrusion
Cooling & Winding Stability System
Maze-style air cooling ring ensures uniform bubble cooling
Torque motor controlled winding system ensures:
Flat roll formation
Stable tension control
Easy roll change during continuous production
Application Scenarios
This machine is widely used in:
Plastic vest bag manufacturing factories
Supermarket shopping bag production lines
Packaging film wholesale suppliers
Industrial packaging manufacturers
It is especially suitable for businesses targeting high-value retail packaging markets.
Quality Assurance & Manufacturing Standard
To ensure industrial reliability, each machine is tested before delivery:
24-hour continuous operation test
Stripe stability inspection under load conditions
Electrical safety system verification
Film thickness uniformity testing
Quality Commitment
Standard warranty: 12 months for main components
Lifetime technical support via remote guidance
Spare parts supply availability for long-term operation
Frequently Asked Questions
Q: What is the minimum order quantity (MOQ)?
A: MOQ is 1 set.
Q: What is the delivery time?
A: Standard production time is 30–45 days depending on configuration.
Q: What payment terms are accepted?
A: T/T 30% deposit, 70% balance before shipment.
Q: What trade terms are available?
A: EXW, FOB, CIF, and CFR are supported.
Q: How is the machine packaged for export?
A: Machines are packed with protective film, reinforced wooden case, and steel frame for sea shipment safety.
Q: What certifications can be provided?
A: CE certification and export compliance documents are available upon request.
Q: Can the machine be customized?
A: Yes, output, width, and screw configuration can be adjusted based on production needs.
Q: Do you provide installation support?
A: Yes, remote guidance and optional overseas engineer installation are available.
Q: What is the service life of the machine?
A: 8–10 years under proper maintenance and industrial operation.
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