Glossy Gradient Color Open Top Metallic Custom Mylar Bags #1152

Glossy Gradient Open Top Metallic Mylar Bags

Engineered for structural integrity and high-level barrier defense. Features a multi-layered composite construction with a high-visibility glossy gradient outer finish.

Built for rapid processing through high-speed manual or automated thermal impulse sealing systems. Flat open-top format eliminates filling bottlenecks.

Material & Barrier Specifications

Film Thickness: 110 Microns / 4.5 mil (Per side). Total 220 Microns.

Structure: PET (Outer Print Layer) + VMPET (Vacuum Metallized Aluminum Barrier) + PE (Inner Food-Safe Sealant).

OTR (Oxygen Transmission): < 0.5 cc/m²/24hrs.

MVTR (Moisture Vapor): < 0.5 g/m²/24hrs.

FDA Compliance: Inner PE layer complies with FDA CFR Title 21 regarding direct food contact safety.

Chemical Safety: 100% BPA-Free, Phthalate-Free, and heavy-metal compliant.

Manufacturing: Produced in an ISO 9001:2015 certified facility ensuring consistent batch-to-batch quality.

Hardware Compatibility: Standard thermal impulse sealers or continuous band sealers.

Temperature Parameters: 150°C – 180°C (300°F – 356°F) depending on machine dwell time.

Seal Width: Minimum 5mm seal band recommended to guarantee airtight closure.

Q: Are these bags compatible with vacuum sealing systems?

A: Yes. The flat open-top format functions with commercial nozzle-style vacuum sealers prior to heat sealing, optimizing long-term preservation.

Q: Can artwork bleed off the edge of the bag?

A: For pre-made low-MOQ runs, standard print zones require a 5mm safe margin from all edges. Full-bleed edge-to-edge printing is available for custom extrusion orders >10,000 units.

Q: How does the gradient finish affect scannability of barcodes?

A: We recommend printing barcodes using high-contrast opaque inks (White base with Black print) on flat locations to prevent infrared reflection from the underlying metallized layer.

Q: Do these bags provide a complete odor and UV light barrier?

A: Yes. The VMPET aluminum barrier layer provides near-zero transmission of UV light and volatile organic compounds (VOCs), ensuring product freshness and discreet storage.

Q: Are these pouches suitable for liquid or highly viscous products?

A: These specific flat open-top pouches are engineered for dry goods, powders, and solid items. For liquids, we recommend specialized spouted or heavy-duty foil liquid-grade pouches to prevent hydraulic pressure blowouts.

Q: What is the recommended storage condition for unfilled bags?

A: Unfilled inventory should be stored in a climate-controlled environment between 15°C–25°C (59°F–77°F) with relative humidity below 60% to prevent static build-up and preserve the inner PE sealant layer.