Paper–film–aluminium lamination technology transforms the liquid packaging carton for long shelf life into a gable-top liquid packaging carton with exceptional oxygen- and light-barrier performance. It keeps beverages and sauces shelf-stable at room temperature for the long term, reduces plastic usage, and aligns with the global shift toward paper-based solutions. The pack tolerates both ambient and 70–90 °C hot-fill processing, then travels without cold-chain, and is suitable for high-proof spirits as well as flavor-sensitive condiments. Variations beyond the gable-top profile—such as flat-top cartons—are also available to meet diverse filling and pouring requirements.

• What is "liquid packaging carton for long shelf life"?
• Key features & functions
• Sustainability in focus
• Key applications & uses
• Detailed specifications
• Configuration options
• Frequently asked questions

Typical milk packs cannot preserve their contents at room temperature for long periods. The liquid packaging carton solves this issue: DNP’s proprietary converting technology*1 gives the paper pack perfect seal integrity and the right barrier layers, preventing quality loss and enabling long-term storage*2 without refrigeration. Thanks to these features, the liquid packaging carton for long shelf life is especially suitable for high-proof alcohol and flavor-sensitive condiments that demand both durability and aroma protection.

Ordinary milk packs cannot stay airtight long enough for room-temperature storage. The liquid packaging carton for long shelf life overcomes this with several DNP innovations. The entire carton is finished with skiving and hemming—trimming and folding the board edge into a seamless seal that shuts off permeation paths. In addition, a layer stack engineered with DNP’s film know-how, together with proprietary filling-machine expertise, eliminates leaks and pin-holes. Together, these technologies provide the liquid packaging carton with the hermetic performance required for extended ambient shelf life.

Adding a barrier layer protects the contents of the liquid packaging carton from oxygen, water vapour, and other external factors that shorten shelf life. Light-shielding and aroma-retention functions can also be incorporated. Three barrier materials are available — aluminium foil, transparent vapor-deposited film, and aluminium vapor-deposited film. For the transparent vapor-deposited film, we employ DNP’s Transparent Barrier Pouch.

By replacing plastic bottles, glass bottles or cans, the flat-shipped paperboard carton cuts material-storage space before filling to about 1/50 that of equivalent glass bottles. After filling, its efficient rectangular shape lets one pallet carry roughly twice as many units as glass, improving transport efficiency. The resulting logistics savings also help lower CO₂ emissions. At end-of-life, consumers can crush the carton to minimise household waste volume.

The liquid packaging carton for long shelf life is available from 200 ml to 3000 ml, including the standard 1 litre size. While our standard offering is the classic gable-top profile, flat-top versions or custom silhouettes may be explored as potential design candidates upon request—each built on the same high-performance liquid packaging carton platform. Closure options include caps engineered to resist chemical-stress cracking for products such as shampoo or hand soap, as well as DNP’s easy-open cap for effortless opening. This line-up allows brands to match any usage scene and deliver the user experience required.

Beyond ambient filling, the liquid packaging carton for long shelf life withstands hot-filled at 70–90 °C. The liquid packaging carton withstands the thermal cycle without panel distortion or seal failure, letting you heat-pasteurise low-acid, low-salt sauces, and dressings while keeping their subtle tastes intact. By combining shelf-stable performance with hot-fill capability, the pack unlocks new opportunities for condiments and other value-added foods that demand both flavor fidelity and microbiological safety.

Plastic reduction is vital to addressing ocean pollution and broader environmental issues. The liquid packaging carton for long shelf life replaces conventional plastic formats with a paper-based solution: a liquid packaging carton that cuts plastic by making paper the main structural material. When sourced from certified forests and paired with plant-based plastics, this liquid packaging carton achieves an even smaller environmental footprint while still delivering the performance global brands require.

・High-proof spirits such as whisky, vodka, rum, gin, and other distilled liquors

・Soy sauce, noodle-soup base, vinegar, edible oils, salad dressings

Panel width : 50 – 95 mm
Fill volume : 200 – 3000 ml
Shapes : gable-top, flat-top (other shapes on request)
Spouts/Caps : DNP easy-open cap, stress-cracking resistance cap, standard cap

With aluminium-foil barrier:
PE / Paper / PE / Aluminium foil / Adhesive / PET / PE

With vapour-deposited film barrier:
PE / Paper / PE / Vapour-deposited PET / PE

The liquid packaging carton for long shelf life features a cap and inner plug that open together—no pull-ring required. Existing cartons rely on a pull-ring inside the spout, which demands extra strength and frustrates users. With DNP’s design, you simply twist the cap and the inner plug clicks off the spout in one smooth action.

1.One-twist opening
Simply twist the cap once; the inner plug clicks off the spout at the same time, confirming that the carton is open.

2. Solves pull-ring hassles
The design eliminates the hard-to-grip ring, the force needed to pull it out, and the splashing that often occurs with conventional pull-ring closures.

3. Hygienic handling
Fingers never touch the pouring surface because the inner plug remains attached to the cap.

4. No loose waste
The pull-ring-free mechanism leaves no ring debris after opening, keeping the package and surroundings clean.

By adding DNP’s proprietary low-adsorption layer to the product-contact side of the liquid packaging carton for long shelf life, aroma compounds remain in the product instead of migrating into the inner layers.This makes the carton ideal when flavour integrity is critical—for example, premium sauces or spirits whose bouquet must be preserved. A typical structure is:

By incorporating a transparent slit into the liquid packaging carton for long shelf life, consumers can check both fill level and product colour at a glance—functionality previously available only with glass or plastic bottles.
These configuration options allow brand owners to tailor the liquid packaging carton to specific product needs while retaining the sustainable paper-based body of the liquid packaging carton family.