Silicon Coating for Fiber-Based Beverage Containers
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Solution Overview
Problem
Existing fiber-based containers, such as carton packages, lack moldability and have poor barrier properties against gases, light, and moisture, leading to reduced shelf life of beverages and environmental concerns due to plastic usage.
Innovation Solution
A silicon-containing coating material, such as SiOx, is applied to the inner and outer walls of fiber-based containers using plasma-enhanced chemical vapor deposition, forming a thin glass-like layer that enhances barrier properties and is free of plastic constituents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fiber-based containers are used instead of plastic or glass, then environmental friendliness and moldability are improved, but barrier properties against gases, light, and moisture deteriorate
Solution Approach 1:
The patent applies a silicon-containing coating layer to the fiber-based container to create a composite structure. This coating provides the necessary barrier properties against oxygen, carbon dioxide, moisture, and light penetration, while the fiber-based material maintains its environmental friendliness and moldability. The composite structure resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The silicon-containing coating acts as an intermediary layer between the fiber-based container and the beverage contents. This intermediate layer prevents direct interaction between the beverage and the fiber material, blocking the penetration of gases and moisture while allowing the container to maintain its eco-friendly characteristics.
2Object-affected harmful factors
If plastic materials are used for coating fiber-based containers, then barrier properties are improved, but environmental friendliness deteriorates due to plastic pollution
Solution Approach 1:
The patent changes the material parameter of the coating from plastic-based to silicon-containing material. This parameter change maintains the barrier functionality while eliminating the harmful environmental effects associated with plastic pollution, recycling difficulties, and microplastic contamination.
Solution Approach 2:
The silicon-containing coating provides a durable barrier layer that can be applied to disposable fiber-based containers. This approach allows the container to be single-use while maintaining barrier properties without relying on plastic materials that cause long-term environmental pollution.
3Object-affected harmful factors
If conventional coating materials like wax or LDPE are used, then barrier properties are improved, but environmental compatibility and recyclability deteriorate
Solution Approach 1:
The patent changes the chemical composition parameter of the coating material from organic-based (wax, LDPE) to inorganic silicon-containing material. This change improves both barrier properties and recyclability, as silicon-based coatings can be more easily separated and do not contaminate recycling streams of fiber-based materials.
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 coating method provides a liquid-tight, gas-tight, and moisture-tight container that is environmentally friendly, with reduced plastic content, allowing for separate recycling of components and improved shelf life.
Implementation Method 1
a silicon-containing coating material, which is produced from a flowable precursor in a plasma process, is applied to an inner wall and/or an outer wall of the container
Implementation Method 2
a silicon-containing coating material, which is produced from a flowable precursor in a plasma process
Data Source
AI summary
Provided is a method for coating containers, and in particular beverage containers which are suitable and intended to receive a liquid, wherein the container to be coated has a main body, a shoulder region, a base region and a mouth region, wherein for coating of an inner wall and/or an outer wall of the container a silicon-containing coating material is produced from a flowable precursor, which is applied to the inner wall and/or the outer wall of the container. The container to be coated is a container made from a fiber-based material.