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Hot Cold Bags

Temperature maintenance during transit requires packaging capable of managing both heat retention and cold preservation. We manufacture hot cold bags utilizing a three-tier material construction. The exterior is a laminated BOPP film, the middle layer consists of tensile PP spunbond nonwoven fabric, and the interior utilizes EPE foam bonded with reflective aluminum foil.
This structural configuration allows the same bag to function effectively for transporting heated restaurant meals or frozen supermarket goods. Supplied directly to logistics fleets, supermarkets, and commercial catering businesses, these bags are customizable in dimensions, thermal thickness, and exterior printing to align with specific operational requirements.

Material Composition: BOPP Lamination + PP Nonwoven + EPE Foam + Aluminum Foil.
Dual Functionality: Reflective interior manages both heat retention and cold insulation.
Water Resistance: Laminated exterior repels external moisture and prevents condensation leaks.
Volume Reduction: Fabric construction allows bags to fold flat for warehouse storage.
Closure Mechanisms: Configurable with nylon zippers for airtight sealing or Velcro for rapid access.

Service & Delivery

Factory direct wholesale pricing
Custom dimensions and printing
Prototype sampling available

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Thermal Bag Technical Data

Component	Specification
Material Build	BOPP Film + PP Nonwoven + 2mm/3mm EPE Foam + Aluminum Foil
Fabric Density	80gsm to 150gsm (Depending on dimensional volume)
Thermal Liner	Metallic reflective foil coating
Closure Options	Standard nylon zipper, double-pull zipper, or Velcro flap
Structural Design	Square box base, standard tote bag, or custom dimensions
Print Technology	Lamination Gravure Printing (Up to 7 colors)
Application Scope	Restaurant delivery, grocery cold chain, catering, pharmaceuticals

Standard Configurations for Transport

Dual-Directional Thermal Barrier

The thermodynamic efficiency of hot cold bags depends on the interior aluminum lining. This metallic layer functions as a radiant barrier. When transporting hot items, it reflects radiant heat back toward the food source. When transporting chilled items, it reflects external ambient heat away from the bag interior. The adjacent EPE foam layer suppresses conductive heat transfer, ensuring stable internal temperatures regardless of external weather conditions.

Structural Integrity and Load Capacity

Commercial transport bags are subjected to constant friction and heavy loads. The core of our bags is constructed from PP spunbond nonwoven fabric, known for its high machine-direction and cross-direction tensile strength. Handles are manufactured from heavy-duty nylon webbing and are cross-stitched down to the base of the bag, allowing large catering insulated bags to support heavy aluminum food trays and beverage containers without tearing.

Waterproof Exterior and Sanitation

Hygiene is a primary requirement in food logistics. The exterior of the bag is sealed with a BOPP laminated film, which creates a 100% waterproof barrier against rain and environmental contaminants. Internally, the aluminum foil provides a smooth, non-porous surface. If food leaks or condensation occurs from frozen goods, the interior can be wiped clean and sanitized rapidly, preparing the bag for its next delivery cycle.

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About Changyuan Nonwoven

We are a nonwoven fabric and bag manufacturer based in Changzhou, China, running a full production line from raw material to finished goods since 2012. Our factory handles fabric extrusion, 7-color gravure printing, lamination, and bag making in-house, serving clients in 20+ countries with a daily output of 200,000 pieces.

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FAQs

Do these bags require ice packs for cold transport?

The bags provide passive insulation. They delay temperature equalization but do not generate cold. For extended transit times, sealed gel packs or ice bricks are required. Loose ice is not recommended as the sewn seams are not watertight.

Can a single bag transport hot and cold items simultaneously?

No. A single compartment will equalize the temperature of its contents. Separate hot cold bags must be utilized to transport heated and chilled items independently.

What is the recommended cleaning procedure?

Both the BOPP exterior and the aluminum foil interior are wipeable. Use a damp cloth with mild detergent or standard food-safe sanitizing wipes. Machine washing is not recommended as it may degrade the EPE foam layer.

How is the logo printing applied?

We utilize a lamination gravure process. The ink is printed onto the reverse side of the transparent BOPP film before it is bonded to the nonwoven fabric. This protects the ink from external abrasion and moisture.

Learn More About Thermal Transport Packaging

Passive Temperature Control in Food Delivery

The rapid expansion of the food delivery sector necessitates reliable packaging that bridges the distance between commercial kitchens and consumers. Passive temperature control relies entirely on the packaging materials to restrict heat flow. By combining reflective foil with insulating foam, insulated bags for food delivery effectively manage convection, conduction, and radiation. This material synergy is what allows logistics providers to maintain safe food consumption temperatures during the standard 30 to 45-minute delivery window.

Transitioning to Reusable Logistics Assets

Regulatory changes and corporate sustainability goals are driving a shift away from single-use EPS foam coolers and plastic bags. Fabric-based thermal packaging offers a durable, multi-use alternative. Because the PP nonwoven core and BOPP exterior resist tearing and environmental wear, these bags can endure hundreds of delivery cycles. Supermarkets transitioning to reusable insulated shopping bags find that the initial procurement cost is quickly amortized, resulting in lower long-term packaging expenditures and reduced landfill waste.

Storage Efficiency in Commercial Warehousing

For catering companies and grocery distributors, the physical footprint of packaging inventory is a measurable operational cost. Rigid thermal containers occupy maximum cubic volume at all times. Conversely, soft-sided thermal bags are manufactured to be collapsible. When empty, they fold flat along pre-defined creases. This flexibility allows thousands of units to be shipped and stored on a single pallet, optimizing warehouse space and lowering inbound freight costs for high-volume purchasers.