Cellulose Beverage Container Moisture Barrier Coating
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Solution Overview
Problem
Cellulose-based beverage containers lack a moisture barrier, which is essential for maintaining flavor and shelf life, due to difficulties in applying a moisture barrier that is both effective and compostable, as existing materials are prone to mechanical stress and poor adhesion with cellulose.
Innovation Solution
A layered structure comprising a cellulose body with a surface coating and a moisture barrier coating, where the surface coating ensures adhesion and the moisture barrier coating, made from materials like PVDC, nanocellulose, or Silicon nitride, provides a reliable moisture barrier without compromising compostability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a moisture barrier coating is applied to a cellulose beverage container, then the shelf life and flavor retention are improved, but the structural integrity is compromised due to mechanical stresses and poor adhesion
Solution Approach 1:
The patent applies a composite coating structure consisting of a primer layer and a moisture barrier coating layer. The primer layer is specifically designed to improve adhesion between the cellulose substrate and the moisture barrier coating, while the moisture barrier coating provides the necessary barrier function. This composite approach allows both adhesion and barrier performance to be optimized simultaneously.
Solution Approach 2:
The primer layer acts as an intermediary between the cellulose beverage container and the moisture barrier coating. It provides a bonding interface that ensures strong adhesion, preventing the moisture barrier coating from peeling or detaching under mechanical stress during filling and transportation operations.
2Ease of manufacture
If a thin layer of moisture barrier material is applied to maintain compostability, then the environmental friendliness is improved, but the barrier effectiveness is reduced due to susceptibility to mechanical stresses
Solution Approach 1:
The patent uses a composite coating system where a thin moisture barrier coating layer is combined with a primer layer. This allows the moisture barrier function to be maintained with minimal material thickness, preserving compostability while the primer layer provides the mechanical strength and adhesion needed to prevent coating failure under stress.
Solution Approach 2:
The patent optimizes the thickness and material properties of the coating layers to achieve the right balance. The moisture barrier coating is applied as a thin layer to maintain compostability, while the primer layer compensates for mechanical strength, allowing the system to meet both environmental and functional requirements.
3Reliability
If existing moisture barrier materials like metals or PVDC are applied, then the moisture barrier function is improved, but the adhesion to cellulose body is poor due to dissimilar material characteristics
Solution Approach 1:
The primer layer serves as a bonding intermediary that is compatible with both the cellulose substrate and the moisture barrier coating materials (such as metals or PVDC). It provides surface activation and adhesion promotion, enabling strong bonding between dissimilar materials that would otherwise be incompatible.
Solution Approach 2:
The patent employs a composite coating structure with a primer layer specifically formulated to bond with cellulose and a moisture barrier coating layer that provides the barrier function. This composite approach resolves the adhesion problem between dissimilar materials by introducing an intermediate bonding layer.
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 effectively provides both oxygen and moisture barriers, enhancing the shelf life and flavor retention of beverages while maintaining the compostability of the container, regardless of its design or shape.
Implementation Method 1
a surface coating (310) being a base coating that forms a layer of the layered construction closest to the cellulose body
Implementation Method 2
a moisture barrier coating (320) to provide a moisture barrier function
Implementation Method 3
The layered structure (101) comprises a cellulose body (200), which defines a cavity (102). The layered structure (101) comprises coating layers (300), which are applied on the cellulose body (200) as a layered construction
Data Source
AI summary
The invention relates to a beverage container (too) for preparing a beverage by injecting a fluid into a cavity (102) inside the beverage container (too). The cavity (102) is defined by a cellulose body (200) and encloses a substance for beverage preparation. The beverage container (too) has a layered structure (101) with a moisture and oxygen barrier function. The layered structure (101) comprises the cellulose body (200) and coating layers (300) that are applied on the cellulose body (200) as a layered construction. The coating layers (300) comprise a moisture barrier coating (320), which provides the layered structure (101) with the moisture barrier function. The coating layers (300) further comprise a surface coating (310) as a base coating, which forms the layer of the layered construction that is closest to the cellulose body (200). The invention also relates to a method for producing the beverage container (too).