Hybrid Paper-Plastic Package Frame for Edge Moisture Protection
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Solution Overview
Problem
Existing packaging technologies often fail to effectively protect paper-based materials from moisture ingress and physical damage, particularly at exposed edges, leading to potential degradation and loss of functionality.
Innovation Solution
A hybrid package design incorporating a frame formed from plastics material and a wall formed from paper or paper-based material, with the frame covering all exposed edges of the wall to prevent moisture entry and physical damage, using a combination of materials like polypropylene and paperboard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If paper-based material is used for packaging walls, then environmental benefits are achieved, but moisture ingress and physical damage occur at exposed edges
Solution Approach 1:
The patent combines paper-based material with plastics material to create a hybrid package. The paper-based wall is coated or laminated with a plastics layer, creating a composite structure that provides both environmental benefits and moisture protection. This composite approach resolves the contradiction by maintaining the eco-friendly characteristics of paper while adding the moisture-resistant properties of plastics.
Solution Approach 2:
The patent applies a thin film or coating of plastics material over the paper-based wall. This flexible barrier layer prevents moisture ingress while allowing the package to maintain its structural integrity and environmental appeal. The thin film acts as an effective moisture barrier without compromising the overall package design.
2Object-affected harmful factors
If paper-based material is used for packaging walls, then environmental benefits are achieved, but physical damage occurs at exposed edges
Solution Approach 1:
The hybrid composite structure combines the mechanical strength of plastics with the environmental benefits of paper. The plastics coating or laminate provides physical protection against damage while the paper-based material maintains its eco-friendly characteristics, resolving the contradiction between environmental benefits and physical durability.
Solution Approach 2:
The plastics coating or laminate is applied beforehand to the paper-based wall, creating a protective barrier that cushions against physical damage. This pre-applied protective layer absorbs and distributes mechanical stresses, preventing direct damage to the paper-based material while maintaining the package's environmental appeal.
3Reliability
If frame covers all exposed edges of wall, then protection from moisture and damage is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the frame structure with the wall formation process. The plastics frame is integrated into the molding process that forms the paper-based wall, combining two protective functions into a single manufacturing operation. This merging approach provides comprehensive edge protection while avoiding the complexity of separate frame assembly steps.
Solution Approach 2:
The frame structure is formed preliminarily during the molding process before the package is assembled. The plastics frame is created as part of the molding operation that shapes the paper-based wall, providing pre-formed protection against moisture and physical damage. This preliminary formation eliminates the need for subsequent frame assembly steps, reducing overall manufacturing complexity.
Data Source
AI summary
A hybrid package is provided and comprises a wall formed from a paper or paper-based material and a frame formed from a plastics material. The frame includes a step which is positioned against a free edge of the wall, whereby one or more exposed edges of the wall are protected by the frame.