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ZDF-300 Fully Automatic Microwave Popcorn Kraft Bag Forming Machine
Description
ZDF-300 Fully Automatic Microwave Popcorn Kraft Bag Forming Machine
Industrial-grade, servo-driven bag former engineered exclusively for microwave popcorn kraft paper packaging. Central heat seal, PLC touchscreen control, 300 bags/min — zero operator intervention once running.
✓ CE Certified ✓ Fully Automatic ★ 300 bags/min Central Seal Kraft / MPET
300 Bags / Minute
±1°C Seal Temp Precision
99.2% Uptime Rate
<15min Format Changeover
Complete Technical Specifications
All specifications are measured under standard operating conditions (23°C ambient, regulated air supply, standard kraft/MPET laminate). Performance may vary by film type and ambient conditions.
Model
ZDF-300
Production Speed
Up to 300 bags/min
Bag Type
Microwave popcorn bag — central fin seal (flat + expandable gusset)
Bag Size Range
L: 160–320 mm · W: 90–160 mm · Gusset: 20–50 mm
Film Materials
Kraft paper, MPET/Kraft laminate, greaseproof paper laminates (30–120 g/m²)
Film Roll Width
Max 450 mm
Film Roll Outer Diameter
Max 600 mm
Seal Type
Central fin seal (heat seal) + bottom seal
Seal Temperature Range
80–220°C (PID controlled, ±1°C)
Control System
Siemens / Mitsubishi PLC + 10" color touch screen HMI
Drive System
Full servo motor (5-axis independent servo)
Positioning System
Photoelectric eye (EPC) color mark registration
Power Supply
3-phase 380V / 50Hz (custom 220V/60Hz available)
Power Consumption
≤ 8.5 kW
Air Pressure
0.4–0.6 MPa · ≥ 200 L/min
Machine Dimensions
3,600 × 900 × 1,700 mm (L × W × H)
Machine Weight
≈ 1,800 kg
Frame Material
SUS304 stainless steel (food-grade contact parts)
Certification
CE · ISO 9001:2015
Warranty
12 months (parts & labor) + lifetime technical support
What Makes the ZDF-300 Different
Unlike generic VFFS bag makers, the ZDF-300 was purpose-engineered for the specific demands of microwave popcorn packaging: aggressive grease resistance, precise expandable gusset formation, and a consistent central fin seal that withstands microwave steam pressure.
5-Axis Full Servo Drive
Every motion axis — film feed, seal pressure, cutter, gusset former, and conveyor — is independently servo-controlled. This eliminates mechanical cam wear and allows instant speed adjustment without stopping the line.
PID Seal Temperature Control
Dedicated PID loops hold seal bar temperature within ±1°C. Critical for kraft/MPET laminates where over-sealing degrades the microwave susceptor layer and under-sealing causes bag burst during cooking.
Central Fin Seal Precision
The ZDF-300 creates a symmetrical fin seal centered on the bag's back panel — the premium presentation standard for retail microwave popcorn. Competing machines using offset seals require additional trimming.
Tool-Free Format Change
Bag width and length adjustments are made via the touchscreen and hand-wheel dials — no wrenches, no replacement parts. Full format change from 160 g to 280 g bag in under 15 minutes.
Auto Splice + Fault Detection
Dual-roll unwind with automatic splice alert minimizes downtime at roll change. Integrated film break detection, seal temperature alarm, and jam detection halt the line before scrap accumulates.
Downstream Line Integration
Standardized discharge conveyor interface (400 mm belt width) is pre-wired for direct handshake to rotary filling machines and linear weighers. No custom integration engineering required for standard configurations.
"The single most overlooked specification in microwave popcorn bag forming is seal bar dwell time consistency. At 300 bags/min, each seal cycle completes in 200 milliseconds. A machine relying on mechanical cams will show dwell time variance of ±15 ms as the cam wears — translating directly to inconsistent seal strength and field returns. The ZDF-300's servo-driven seal jaw eliminates this variable entirely, maintaining dwell time within ±2 ms across the full production run."
— Application Engineering Note | ZDF-300 Technical Brief, Rev. 4ZDF-300 vs. Standard Bag Forming Options
Not all bag forming machines handle microwave popcorn requirements equally. The table below highlights the capabilities that matter specifically for this application.
| Capability | ZDF-300 (This Machine) | Generic VFFS Machine | Semi-Auto Former |
|---|---|---|---|
| Purpose-built for kraft/MPET microwave bags | ✓ Yes | ✗ General purpose | ✗ No |
| Central fin seal (not offset) | ✓ Standard | ✗ Optional / extra cost | ✗ Manual |
| Expandable gusset formation | ✓ Integrated | ✗ Add-on module | ✗ No |
| Full servo drive (all axes) | ✓ 5-axis servo | ✗ Cam/motor hybrid | ✗ Manual/pneumatic |
| PID seal temp control (±1°C) | ✓ Standard | ± 5–8°C typical | Manual dial |
| Production speed | 300 bags/min | 60–150 bags/min | 20–40 bags/min |
| Format changeover time | < 15 min | 30–60 min | 60–120 min |
| Downstream line integration | ✓ Standard interface | Custom engineering | ✗ Manual transfer |
| CE Certification | ✓ Certified | Varies | ✗ Typically not |
How the ZDF-300 Forms a Microwave Popcorn Bag
1
Film Unwind
2
Register Mark Detection
3
Forming Collar Wraps Film
4
Central Fin Seal Applied
5
Gusset Folding
6
Bottom Seal + Cut
7
Bag Count & Discharge
Each formed bag is ready for downstream filling. The bottom seal is applied and the bag is cut to length in the same station, maintaining a continuous flow. Bag count is tracked per shift and stored in the HMI for production reporting.
What Buyers Often Miss When Selecting a Popcorn Bag Forming Machine
⚠ Susceptor Compatibility
Microwave popcorn bags use a metallic susceptor layer (usually MPET) that reaches 200°C+ during cooking.
Seal bar temperature programs must be validated against each specific MPET/kraft laminate — not just rated for "kraft."
The ZDF-300 ships with pre-loaded seal profiles for the 6 most common microwave popcorn laminates.
⚠ Gusset Accuracy at Speed
Expandable side gussets must be folded symmetrically or bags will not expand properly during microwaving.
At 300 bags/min, mechanical fold guides drift. The ZDF-300 uses servo-positioned fold arms corrected every cycle.
Asymmetric gusset failure is the #1 cause of consumer complaints in microwave popcorn.
✓ Total Cost of Ownership
Full servo drive replaces consumable cams and followers. Projected maintenance saving: 40–60% vs. cam-driven machines over 5 years.
Format change in <15 min vs. 45–90 min on competitors — recovers >200 hr/year on multi-SKU lines.
Ask for the TCO comparison worksheet when requesting a quote.
✓ Regulatory Readiness
CE marking covers the complete machine, not individual modules separately.
SUS304 food-contact parts comply with FDA 21 CFR §177 and EU Regulation 10/2011.
Electrical panel is UL-listed as standard on export models.
Suitable Product Applications
While the ZDF-300 is optimized for microwave popcorn, its forming and sealing system handles a broader range of similar products requiring heat-sealable kraft or paper laminate bags:
ZDF-300 — Questions Buyers Ask
What is the actual production speed, and what affects it?
The rated speed is 300 bags/min on standard 225 mm × 130 mm bags with MPET/kraft laminate at 23°C. Larger bags (320 mm length) reduce throughput to ~240 bags/min due to longer seal dwell requirement. Thicker laminate (>90 g/m²) may require reduced speed to maintain seal integrity. The PLC auto-adjusts safe maximum speed based on entered bag dimensions and film type.
What is the difference between a central seal and a back seal for microwave popcorn bags?
A central fin seal (used by the ZDF-300) runs down the geometric center of the bag's back surface, creating a visually symmetrical package. Both faces look identical to consumers. A back seal is offset to one side — faster and cheaper to produce, but results in an asymmetric bag that premium brands avoid. Retail buyers for supermarket chains typically require center-sealed bags for shelf appearance standards.
Can the ZDF-300 handle both flat-bottom and expandable gusset bags?
Yes. The ZDF-300 ships standard with servo-driven side gusset formers. Switching between a flat-bottom and an expandable side-gusset configuration is done via a parameter change on the HMI plus a quick mechanical adjustment — no tooling swaps. Gusset depth is adjustable from 20 to 50 mm.
What are the installation requirements for the ZDF-300?
Floor space: minimum 5.0 m × 2.0 m clear area (allowing 700 mm service access on all sides). Power: 3-phase 380V/50Hz, 32A dedicated circuit (16A continuous draw). Compressed air: clean dry air at 0.5 MPa, min 200 L/min flow. Ambient temperature: 5–40°C. Humidity: 20–85% non-condensing. Factory acceptance testing and remote commissioning support are included in the standard package.
Is spare parts availability a concern for buyers outside China?
The ZDF-300 uses Siemens (PLC, drives) and SMC (pneumatics) components, which are stocked by distributors in over 60 countries. Seal bars and forming collars are machine-specific; a standard 2-year wear-parts kit is recommended at purchase. We maintain a regional spares depot in Latin America with 48-hour courier to most major cities.