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.

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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.

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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.

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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.

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Product Specifications

<span style={{color: "var(--color-fg-default)"}}>Application	<span style={{color: "var(--color-fg-default)"}}>Typical Structure	<span style={{color: "var(--color-fg-default)"}}>Thickness (µm)	<span style={{color: "var(--color-fg-default)"}}>Size Range (W×H)	<span style={{color: "var(--color-fg-default)"}}>Seal Type	<span style={{color: "var(--color-fg-default)"}}>Special Options
<span style={{color: "var(--color-fg-default)"}}>Pharmaceutical Blister Backing	<span style={{color: "var(--color-fg-default)"}}>PET/AL/PE	<span style={{color: "var(--color-fg-default)"}}>90–120	<span style={{color: "var(--color-fg-default)"}}>80×100 mm	<span style={{color: "var(--color-fg-default)"}}>Hermetic Heat Seal	<span style={{color: "var(--color-fg-default)"}}>Easy-tear Notch
<span style={{color: "var(--color-fg-default)"}}>Gourmet Spices	<span style={{color: "var(--color-fg-default)"}}>PET/VMPET/PE	<span style={{color: "var(--color-fg-default)"}}>80–110	<span style={{color: "var(--color-fg-default)"}}>60×80 mm	<span style={{color: "var(--color-fg-default)"}}>Peelable Top Seal	<span style={{color: "var(--color-fg-default)"}}>Round Corners
<span style={{color: "var(--color-fg-default)"}}>Single-Serve Coffee	<span style={{color: "var(--color-fg-default)"}}>PET/PE	<span style={{color: "var(--color-fg-default)"}}>70–90	<span style={{color: "var(--color-fg-default)"}}>90×130 mm	<span style={{color: "var(--color-fg-default)"}}>Standard 4-Side Seal	<span style={{color: "var(--color-fg-default)"}}>Degassing Valve
<span style={{color: "var(--color-fg-default)"}}>Organic Snack Trial	<span style={{color: "var(--color-fg-default)"}}>Recyclable PE/PE	<span style={{color: "var(--color-fg-default)"}}>85–110	<span style={{color: "var(--color-fg-default)"}}>100×120 mm	<span style={{color: "var(--color-fg-default)"}}>Resealable Zipper	<span style={{color: "var(--color-fg-default)"}}>Laser Score Line
<span style={{color: "var(--color-fg-default)"}}>Custom Options	<span style={{color: "var(--color-fg-default)"}}>Custom Material	<span style={{color: "var(--color-fg-default)"}}>Customizable	<span style={{color: "var(--color-fg-default)"}}>Customizable	<span style={{color: "var(--color-fg-default)"}}>Customizable	<span style={{color: "var(--color-fg-default)"}}>Customizable

Note: Custom sizes and structures available.