Overview

The 4-seal bag is the preferred packaging format for construction materials and industrial chemicals. Its four-side sealed structure provides complete protection against moisture, dust, and contamination—critical for products used in wet or outdoor environments.

With a top-mounted handle, it allows easy carrying and stacking on shelves or construction sites. The stand-up design keeps the bag upright when filled, improving visibility and accessibility.

Perfect for retail stores, hardware shops, and industrial suppliers, this bag combines durability, functionality, and cost-efficiency.

Product Features

• Four-Side Sealing: Top, bottom, and both sides are heat-sealed—creates a robust "pocket" that resists bursting, leakage, and tampering.

• Material Options:

  • Standard Barrier: PET/PE (for non-sensitive products)

  • High Barrier: PET/AL/PE (blocks O₂, moisture, light—ideal for sensitive formulations)

  • Eco-Friendly: PLA-based or compostable films (certified by OK Compost)

• Sealing Technology: Four-side heat seal with reinforced edges—resists tearing during handling.

• Print Excellence: Full-color offset printing; supports Chinese characters, English text, barcodes, and regulatory symbols.

• Finishing Options: Peelable seal, tear notch, or child-resistant closure.

• Structure Types:

  • Flat Bottom: Lays flat on shelves

  • Stand-Up: Self-supporting when filled (requires gusseted bottom)

• Certifications: FDA-compliant, BRCGS, ISO 22000, REACH-compliant materials.

Product Advantages

• Retail Ready: Stand-up design makes it perfect for supermarket and hardware store displays.

• Consumer Trust: Full surface branding with bilingual labels enhances professionalism.

• Hygiene Protection: Sealed environment prevents contamination during storage and transport.

• Automation Ready: Compatible with high-speed HFFS lines at speeds up to 100 bags/min.

Quality Assurance

• Seal Strength: ≥30 N/mm (tested per ASTM F88)

• Moisture Barrier: WVTR ≤3 g/m²/24h (with PE liner)

• Oxygen Barrier: OTR ≤2 cc/m²/day (with AL layer)

• Color Accuracy: ΔE ≤3 for critical colors

• Production Control: In-line inspection, metal detection, and batch traceability via QR code.

Product Specifications

Note: Custom sizes and structures available.