Ultrasonic Sewing Machine for PP Woven Bags – Optimal Solution for Modern Production

Introduction to PP Woven Bags

PP Woven Bags (Polypropylene woven bags) are durable, lightweight, and cost-effective packaging, commonly used for packing grains, fertilizers, chemicals, sugar, salt, and agricultural products due to their high load-bearing capacity, easy reusability, and high safety standards.

Ultrasonic Sewing Technology – Superior Advantages

The VietSonic ultrasonic sewing machine for PP woven bags utilizes high-frequency ultrasonic technology (20–40 kHz) to seal PP film edges without needles, thread, or glue. Thanks to friction generating mild heat, PP fibers melt to form a strong bond while the seam remains aesthetic, clean, and fray-free.

Key Benefits:

  • High production speed, reaching up to 60 bags/minute.
  • Uniform, sharp sealed edges, good tensile strength, no fiber tearing.
  • Clean operation, no smoke or dust, suitable for medical and food standards.
  • Labor cost savings, threadless operation, compact and reliable machine.

PP Woven Bag Production Process with Ultrasonic Machine

  1. Prepare PP woven fabric rolls with a density of 40–120 g/m², maximum width up to 1.6 m.
  2. The ultrasonic machine seals the bag edges without using thread or excessive heat.
  3. Cutting and sealing can be performed in a single step.
  4. Create products with customized dimensions (width 100–800 mm, length 200–650 mm) with high precision.

PP Woven bag sewing steps
Step 1: Folding and sewing bag edges
Step 2: Folding and sewing bottom
Step 3: Sewing bag sides

Sample Machine Configuration:

  • Ultrasonic Frequency: 20 kHz with 2000 W power.
  • Support Heat: 60–120 °C.
  • Capacity: Approx. 60 bags/minute.
  • Machine Dimensions: ~2.2 × 1.4 × 7 m, Weight ~2000 kg

Introduction to ultrasonic sewing machine
Technical specifications

Technology Comparison: Traditional Sewing, Thermal Glue & Ultrasonic

Method Aesthetic Edge Speed Cleanliness Cost
Manual / Mechanical Sewing Often frayed, easy to tear Low No High
Thermal Glue / Adhesive Thread Edges may be uneven Medium Glue fumes present Medium
Ultrasonic Machine ✅ Beautiful, durable ✅ High ✅ Very clean ✅ Low

Multi-Industry Applications – Suitable for All Scales

Ultrasonic PP woven bag machines are suitable for:

  • Industrial packaging: chemicals, fertilizers, cement, plastics.
  • Agro-food products: rice, seeds, grains, sugar, salt.
  • Advertising bags, gift bags, branded bags requiring logo printing.
  • Medium and large-scale production – effective for international orders.

🧠 Why Choose VietSonic?

  • Specialized manufacturing in Vietnam, competitive price, fast delivery.
  • Consultation & Customization according to needs: size, capacity, bag style.
  • After-sales support: 12-month warranty, available spare parts, rapid technical service.
  • Free Sample Testing: Send fabric samples, VietSonic will test weld and send back results via video.
  • Meets Clean Standards, suitable for use in medical bag or clean food production.

Conclusion

The VietSonic Ultrasonic PP Woven Bag Sewing Machine is a strategic choice for businesses needing efficient, high-quality, and eco-friendly production solutions. From agricultural packaging to commercial bags – everything can be processed quickly, uniformly, and aesthetically without the need for thread or glue.

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