Translucent Coated Paper for Food Packaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current transparent packaging materials, whether paper-based or plastic-based, face challenges such as insufficient recyclability, lack of strength, and inability to meet mechanical and barrier requirements, particularly for foodstuffs and toys, while also being non-biodegradable and costly to produce.
Innovation Solution
A coated paper with a base paper containing less than 5 wt% fillers and a heat-sealable coating layer, providing opacity less than 60%, suitable for food contact, biodegradable, and producible from renewable resources, which can be recycled and used in conventional packaging machines without significant modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent papers are made thinner to improve transparency, then transparency is improved, but strength and mechanical properties deteriorate
Solution Approach 1:
The invention uses a composite structure consisting of a transparent paper base and a plastic film layer bonded together. The transparent paper provides the necessary strength and mechanical properties, while the plastic film layer provides the transparency and sealing properties. This composite approach allows the packaging to be both strong and transparent without requiring the paper to be excessively thin.
2Illumination intensity
If plastic films are used to improve transparency and sealing properties, then transparency and sealability are improved, but recyclability via waste paper cycle deteriorates
Solution Approach 1:
The invention segments the packaging material into two distinct layers: a transparent paper layer that is recyclable via the waste paper cycle, and a plastic film layer that provides the necessary sealing and transparency properties. The paper layer can be separated and recycled independently, while the plastic layer provides the functional properties needed for packaging. This segmentation allows the packaging to meet both transparency and recyclability requirements.
3Illumination intensity
If conventional transparent papers are used to improve transparency, then transparency is improved, but heat-sealability and barrier properties deteriorate
Solution Approach 1:
The invention combines transparent paper with a plastic film layer that has excellent heat-sealability and barrier properties. The plastic film layer provides the necessary sealing capability while the transparent paper maintains the transparency. This composite structure allows the packaging to be both transparent and heat-sealable, resolving the contradiction between these two properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The coated paper offers sufficient strength, translucency, and recyclability, enabling it to replace plastic packaging while maintaining mechanical properties and being economically producible, thus addressing the limitations of existing materials.
Implementation Method 1
the coating color layer comprises or consists of at least one heat-sealable material
Data Source
AI summary
The invention relates to a coated paper, more particularly a translucent coated paper, comprising a base paper and a coating color layer applied thereto, wherein the coating color layer comprising a least one polymer and the coated paper having an opacity in the visible of less than 60%; a method for producing a coated paper of this kind, the use of said coated paper as a packaging material and to packaging comprising the coated paper.