You’ve seen the difference on the shelf. Two sachets of the same product — one with a back seal, one sealed on all four sides. The four-side seal looks cleaner. The edges are straight. The printed graphics line up perfectly on both sides. It looks like it belongs in a premium product line.
A powder packaging machine with four-side sealing does more than just look good. The four-side seal configuration creates sachets with seals on all four edges — top, bottom, and both sides. This delivers three advantages that back-seal or three-side designs can’t match: cleaner aesthetics, superior airtightness, and better tear-open convenience. The DXDO-F900E from SanYang Technology runs 4–6 lanes simultaneously at 30–50 cycles per minute, handling milk powder, coffee, flour, and pharmaceutical powders with servo-driven precision and PLC control. This guide covers what makes four-side seal packaging different, why it matters for powder products, and how the DXDO-F900E delivers consistent results at production speeds.
The sealing method determines how the finished sachet performs on the shelf and in the customer‘s hand. Four-side sealing offers distinct advantages over back-seal and three-side configurations.
A back-seal sachet has a seam running down the middle of one side — visible, often slightly raised, and sometimes with uneven edges. A three-side seal has one open edge that becomes the seal after filling. Four-side sealing creates sachets with seals on all four edges, resulting in perfectly straight, consistent edges. The printed graphics can wrap across both sides without interruption. On a retail shelf, that visual difference translates to perceived quality.
Milk powder, coffee, and pharmaceutical powders are hygroscopic — they absorb moisture from the air and degrade quickly. The four-side seal configuration provides a more robust barrier against moisture ingress than back-seal designs. With seals on all four sides, there’s no continuous seam running the length of the sachet where failure is more likely to start. The DXDO-F900E uses a high-precision integral rolling heat sealing roller system that ensures consistent seal strength across every sachet. The sealing temperature is controlled to ±1°C accuracy, maintaining seal integrity across thousands of cycles.
A four-side seal sachet opens cleanly along the designated tear line. The stress is distributed evenly across the seal, so the sachet doesn’t rip unpredictably. For consumers opening a sachet of milk powder or coffee, that predictable tear-open experience matters. A sachet that tears crookedly spills powder — and that’s a customer complaint you don’t want.
The numbers tell you what the machine can do. Here‘s what they mean in practice.
The DXDO-F900E runs 4–6 lanes simultaneously, depending on the configuration. Each lane produces sachets independently, so total output is the lane count multiplied by the cycle speed. At 30–50 cycles per minute with six lanes, that’s up to 300 sachets per minute. For a production manager, that throughput means fewer machines, less floor space, and lower capital investment.
The filling capacity ranges from 1ml to 30ml per sachet, covering small pharmaceutical sachets and single-serve coffee or milk powder portions. The auger filling system uses servo motor control with material level detection and a rotary feeding mechanism to ensure consistent fill weights across all lanes. Each lane can be adjusted independently through the touchscreen interface.
The pouch length is adjustable from 60mm to 120mm without changing molds, thanks to the stepless adjustment system. That means you can switch between product sizes quickly — from a short coffee sachet to a taller milk powder sachet — without stopping to swap tooling. The pouch width is 60-105mm and is fixed per configuration, so choose the width that matches your primary product.
The DXDO-F900E uses a five-axis servo synchronous drive system with PLC control. Each actuator — sealing, cutting, filling, film feed — is driven independently and synchronized electronically. Unlike mechanical drives that wear and drift, servo motors maintain precise positioning across the entire production run. The touchscreen interface allows operators to adjust parameters without stopping the machine.
Below is a quick reference table for the DXDO-F900E key specifications:
| Specification | DXDO-F900E |
|---|---|
| Pouch length | 60–120mm (adjustable, no mold change) |
| Pouch width | 60–105mm (fixed per configuration) |
| Packing speed | 30–50 cycles/min × 4–6 lanes |
| Filling capacity | 1–30ml |
| Applicable film | PET/AL/PE, PET/PE, NY/AL/PE, NY/PE |
| Max film width | 900mm |
| Max film diameter | Φ300mm |
| Film core diameter | Φ75mm |
| Total power | 14kW |
| Machine weight | 1500kg |
A powder packaging machine that only runs one material limits your market. The DXDO-F900E is designed for flexibility.
The DXDO-F900E is specifically designed for milk powder packaging, with features that address the challenges of fine, moisture-sensitive powders. The rotary feeding mechanism ensures consistent material flow, and the ±1°C temperature control maintains seal integrity without overheating the powder. For dairy processors, the four-side seal configuration keeps product fresh longer and looks premium on the shelf.
Coffee powder, instant tea, and drink mixes all benefit from four-side sealing. The clean edges and consistent sachet dimensions stack neatly in display boxes. The machine handles free-flowing powders with minimal dust, reducing waste and keeping the production area clean.
Pharmaceutical powders require precise dosing and contamination-free packaging. The DXDO-F900E uses stainless steel contact parts (SS304/316) with GMP-grade hygiene standards. The filling accuracy and seal integrity meet the requirements of pharmaceutical and nutraceutical applications.
The machine adapts to a variety of packaging films produced at home and abroad, such as PET/AL/PE, PET/PE, NY/AL/PE, NY/PE, and more. Multi-layer laminates with aluminum foil provide the barrier properties that moisture-sensitive powders need.
Q: What‘s the difference between four-side seal and back-seal packaging?
A: Four-side seal sachets have seals on all four edges — top, bottom, and both sides. Back-seal sachets have a seam running down the middle of one side. Four-side seals deliver cleaner aesthetics, better airtightness, and more consistent tear-open performance. For premium products like milk powder and coffee, the four-side seal is the standard.
Q: How does the DXDO-F900E handle different powder types?
A: The machine uses a rotary feeding mechanism with material level detection to ensure consistent flow for both free-flowing and slightly cohesive powders. The auger filling system is servo-driven, with each lane adjustable independently. For sticky or hygroscopic powders, the optional filling nozzle lifting mechanism helps prevent clogging. The machine handles flour, coffee powder, starch, milk powder, and various pharmaceutical powders.
Q: What is the typical production speed for the DXDO-F900E?
A: The machine runs at 30–50 cycles per minute, with 4–6 lanes operating simultaneously. Total output depends on the number of lanes and the pouch size. At 50 cycles per minute with 6 lanes, the machine produces up to 300 sachets per minute. Actual output varies based on the material, pouch size, and product density.
Q: Can I change pouch sizes without buying new tooling?
A: Pouch length is adjustable from 60mm to 120mm without changing molds, using the stepless adjustment system. Pouch width is fixed per configuration — choose the width that matches your primary product when ordering. For significant size changes, you may need to configure the machine for a different width.
SanYang Technology has been manufacturing powder packaging machines with a focus on precision, durability, and automation. The DXDO-F900E four-side seal multi-line powder packaging machine is designed for continuous production in food, pharmaceutical, and chemical environments.
The machine features a five-axis servo synchronous drive system with PLC control and a touchscreen interface. The high-precision integral rolling heat sealing roller achieves four-side sealing and multi-row bag shapes with fast packaging speed and consistent quality. The photoelectric tracking system ensures automatic alignment of double-sided printed patterns, with an automatic counting function for production monitoring.
For powder packaging operations, the combination of four-side sealing, multi-lane output, and servo-driven precision makes the DXDO-F900E a practical choice for high-volume production. Before you commit to a powder packaging machine, evaluate your target sachet size, production volume, and film requirements — the right machine ensures consistent quality and efficient production.
Ready to evaluate a four-side seal powder packaging machine for your operation? Contact SanYang Technology for a quote or product consultation on the DXDO-F900E. Share your target sachet size, powder type, and output requirements — their team can recommend the right configuration for your specific application.
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