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Hot Cold Bags

Hot cold bags Thermal delivery bags Insulated tote bags Reusable cooler bags

Hot cold bags keep hot food hot and cold food cold in the same bag design — the aluminum foil lining reflects radiant heat in either direction, so one bag style serves both hot catering routes and cold grocery programs. The build is a BOPP-laminated PP nonwoven shell with a 2–3 mm EPE foam core. Fleets and retailers stocking a single bag style for both duties simplify purchasing, artwork, and inventory.

• One bag style for hot and cold programs — one SKU, one artwork

• Foil lining + EPE foam core; 80–150 gsm shell

• Zipper closure restricts air exchange

• Cross-stitched handles for heavy catering trays

• Wipe-clean non-porous interior and exterior

• Folds flat for storage and dense bulk packing

Service & Delivery

OEM & ODM accepted
Free artwork support
Sample available before bulk order

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Hot Cold Bag Specifications

Parameter	Details
Material	BOPP laminated film over PP spunbond nonwoven
Fabric Weight	80–150 gsm, matched to payload
Insulation	2–3 mm closed-cell EPE foam
Inner Lining	Reflective aluminum foil coating
Closure	Nylon coil zipper / Velcro flap
Structure	Flat-bottom box base or standard tote
Printing	Reverse-printed rotogravure BOPP lamination, up to 7 colors
Applications	Hot catering delivery, grocery cold chain, promotional programs
MOQ	5,000–10,000 pieces per design; 10,000–20,000 pieces for laminated / rotogravure printing (cylinder setup). Trial orders negotiable when fabric is in stock
Lead Time	Samples: 3–5 days (unprinted) / 7–10 days (printed); Bulk: 20–30 days after sample approval and deposit

Hot Cold Bags by Application

How One Bag Handles Hot and Cold

A hot cold bag works in both directions because of the foil lining. Facing hot food, the reflective surface bounces radiant heat back into the bag; facing cold contents, it reflects ambient heat away. The EPE foam core underneath slows conductive transfer through the wall. One qualification matters for buyers: a single compartment equalizes temperature between its contents, so hot and cold items must travel in separate bags — the dual-direction capability means one bag design covers both duties across a fleet, not that hot and cold mix in one load.

Load Capacity and Construction

Load capacity is decided at the handles and seams. The PP spunbond core gives the shell its tensile strength, and the nylon webbing handles are cross-stitched down the full height of the bag so a full load of dense catering trays hangs on the stitching, not on one stress point. For the full size range including large-volume formats, see insulated cooler bags.

Cleaning, Waterproofing, and Print

Cleaning is fast because both working surfaces are non-porous: the foil interior and the laminated exterior wipe down with a damp cloth and standard food-safe sanitizer. Two care rules protect the bag: machine washing is off-limits because agitation breaks up the foam core, and loose ice is off-limits because stitched seams are not watertight — sealed gel packs are the correct cooling medium.

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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 hot cold bags need ice packs for cold transport?

The bags insulate passively and delay temperature change rather than actively cooling. For routes within a normal delivery window they work on their own; for longer transit, add sealed gel packs or ice bricks. Do not use loose ice — stitched seams are not watertight and meltwater will leak through the needle holes.

Can one bag carry hot and cold items at the same time?

No. A single enclosed compartment equalizes to one temperature, so hot and cold items must travel in separate bags. The dual-direction benefit is at the fleet level: the same bag design serves hot routes and cold routes, so you stock one style instead of two.

How should the bags be cleaned?

Wipe the foil interior and laminated exterior with a damp cloth and food-safe sanitizing solution between cycles. Do not machine wash — mechanical agitation breaks up the EPE foam core and ends the bag's insulation life.

How is the logo print applied?

The artwork is printed on the reverse side of a transparent BOPP film by rotogravure, up to 7 colors, then the film is laminated to the nonwoven shell. The print sits beneath the film, so abrasion and moisture never reach the ink directly.

Hot Cold Bags for Delivery and Retail Programs

Passive Insulation Inside a Delivery Window

Most food delivery runs complete within a 30–45 minute window, and that window is exactly what passive insulation is designed for. The bag does not refrigerate or heat — it slows all three heat transfer paths at once: conduction through the foam core, radiation off the foil lining, and convection through the closed shell and zipper. Orders arriving outside the safe temperature band are almost always an open-bag or overloaded-bag problem rather than a material problem, which is why closure discipline on the route matters as much as the bag specification.

One Bag Style for Both Duties

Operators running both hot catering and cold grocery can stock a single bag style instead of two. The same foil-and-foam structure serves either direction, so one SKU covers both programs: purchasing consolidates, artwork is printed once, and mixed fleets do not need separate storage bins for hot and cold inventory. Bags fold flat along their crease lines when empty, so even thousands of units palletize densely — a storage and inbound-freight saving over rigid coolers that occupy the same volume empty as full.

Replacing Single-Use Coolers

Fabric hot cold bags are the standard replacement where EPS foam coolers are being phased out. The shell and laminate survive hundreds of delivery cycles, and the wipe-clean surfaces meet daily sanitation requirements. For artwork, the design is reverse-printed on the BOPP film and bonded to the fabric, so the print sits under the laminate and survives the bag's full service life. Ordering follows the standard process — see how we work for sampling and lead times.