CMC-Coated Barrier Paper for Oxygen Barrier Without Brittleness
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Solution Overview
Problem
Existing biodegradable packaging materials, particularly those with high oxygen barrier properties, face challenges in maintaining mechanical strength and efficiency due to high parchmentization, which leads to brittleness and increased production costs, while non-biodegradable coatings or processes compromise sustainability.
Innovation Solution
A barrier paper comprising a cellulosic paper base material with a carboxymethyl cellulose (CMC) coating layer, where the CMC constitutes 80-100% by weight, providing excellent oxygen barrier properties and improved mechanical strength without the need for high parchmentization or additional non-biodegradable layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cellulosic paper is highly parchmentized to achieve oxygen barrier properties, then the oxygen barrier property is improved, but the mechanical strength deteriorates
Solution Approach 1:
The invention combines a cellulosic base paper with a carboxymethyl cellulose coating layer to create a composite material that achieves oxygen barrier properties without requiring high parchmentization of the base paper, thereby maintaining mechanical strength
Solution Approach 2:
The invention changes the chemical structure of cellulose by introducing carboxymethyl groups through etherification, creating carboxymethyl cellulose with different properties that provide oxygen barrier functionality while maintaining flexibility and strength
2Reliability
If a cellulosic paper is highly parchmentized to achieve oxygen barrier properties, then the oxygen barrier property is improved, but the productivity deteriorates
Solution Approach 1:
The carboxymethyl cellulose coating is applied in advance to the cellulosic base paper, providing oxygen barrier properties without requiring extensive parchmentization processing, thereby streamlining production and improving productivity
Solution Approach 2:
The invention uses carboxymethyl cellulose coating which can be applied under milder and more efficient process conditions compared to traditional high-temperature parchmentization, reducing production time and increasing productivity
3Reliability
If a cellulosic paper is highly parchmentized to achieve oxygen barrier properties, then the oxygen barrier property is improved, but the manufacturing cost deteriorates
Solution Approach 1:
The invention uses a cellulosic base paper combined with a carboxymethyl cellulose coating layer, which can be produced under milder conditions with lower waste generation, reducing manufacturing costs compared to highly parchmentized papers
Solution Approach 2:
The carboxymethyl cellulose coating process operates under more efficient and less costly parameters compared to traditional high-temperature parchmentization, reducing energy consumption and waste treatment costs
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 solution results in a biodegradable packaging material with enhanced oxygen barrier and mechanical properties, produced efficiently and at lower costs, suitable for oxygen-sensitive items, while maintaining sustainability.
Implementation Method 1
a barrier paper comprising a paper base material and a carboxymethyl cellulose coating layer formed on a surface of the base material... providing excellent oxygen barrier properties
Data Source
AI summary
This invention relates to a barrier paper comprising a paper base material and a carboxymethyl cellulose coating layer formed on a surface of the paper base material, wherein the paper base material is a cellulosic paper and the carboxymethyl cellulose coating layer comprises 80-100% by weight of carboxymethyl cellulose, based on dry weight.