Paper-plastic-aluminum heat-insulating container based on multi-layer composite barrier and preparation method thereof

Through a multi-layered composite structure design, including an inner layer, a heat-reflective layer, a fluffy layer, and an outer layer, the paper-plastic-aluminum insulated container solves the problems of insufficient insulation performance and high plastic consumption, achieving extended insulation time and environmental benefits, and is suitable for takeout and food storage.

CN122276292APending Publication Date: 2026-06-26HANGZHOU SHUANGHAI DEPT STORE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU SHUANGHAI DEPT STORE CO LTD
Filing Date
2025-12-08
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing disposable insulated boxes have insufficient insulation performance, short temperature control time, and high plastic consumption, resulting in poor user experience and huge environmental pressure.

Method used

It adopts a multi-layer composite structure design, including an inner layer of food-grade polypropylene or polyethylene, a heat-reflective layer of aluminum foil, a fluffy layer of paper, and an outer layer of hollow or micro-foamed PP. Through the synergistic effect of multiple layers, it enhances the heat insulation performance and reduces the use of plastics.

Benefits of technology

It significantly extends the heat preservation time, reduces plastic consumption, improves the user experience, meets environmental protection requirements, and is suitable for takeout and food storage.

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Abstract

This invention discloses a paper-plastic-aluminum insulated container based on multi-layer composite barrier and its preparation method. The insulated container includes a container body and a container lid connected to the container body through a concave-convex interlocking sealing structure. The container body has raised platforms on its edge and includes an inner layer, a heat-reflective layer, a fluffy layer, and an outer layer distributed from the inside out. The inner layer is a food-grade contact material layer, including food-grade PP, food-grade PE, or PP / PE composite material. The fluffy layer is made of food-grade paper or a material with the same properties. The heat-reflective layer is an aluminum foil layer or a material with strong heat reflection effect. The outer layer is a PP plastic protective layer. The fluffy layer forms a large number of closed air chambers, further blocking heat conduction and heat convection. The outer layer is a PP layer or micro-foamed PP or a PP hollow structure to form an additional heat barrier. Under the synergistic effect of the multi-layer structure, the heat preservation time is extended, improving the overall experience of takeout or delivery users and the shelf life of food factories.
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Citation Information

Patent Citations

  • Heat preservation box

    CN221820723U