Laminated Packaging Material Customization via Print Substrate
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Solution Overview
Problem
Current laminated packaging materials for liquid food containers lack flexibility and differentiation options, requiring costly changes in paperboard manufacturing to achieve varying appearances, which is not economically viable for frequent customization.
Innovation Solution
A laminated packaging material comprising a cellulose-based bulk layer with a transparent thermoplastic polymer outer layer, a print substrate paper with a decorative pattern, and an inner heat-sealable polymer layer, allowing for easy exchange of outer layers to customize the appearance without stopping production, and using a print substrate paper with specific density and surface roughness for improved print quality and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the paperboard structure is modified to achieve different appearances, then the packaging differentiation is improved, but the manufacturing cost increases significantly
Solution Approach 1:
The patent divides the packaging material into separate functional layers: a standard paperboard bulk layer and a separate print substrate layer. This segmentation allows the print substrate to be customized independently without modifying the paperboard manufacturing process, thus achieving packaging differentiation while maintaining standard manufacturing costs.
Solution Approach 2:
The patent extracts the printing function from the paperboard bulk layer by introducing a separate print substrate layer. This extracted layer can be easily customized with different decorative patterns while the main paperboard structure remains unchanged, resolving the contradiction between differentiation and manufacturing cost.
2Adaptability or versatility
If a separate print substrate layer is added to enable easy customization, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the print substrate layer with the bulk layer through lamination, creating a unified packaging material that combines the structural benefits of paperboard with the customization benefits of printable surfaces. This merging achieves adaptability without requiring separate assembly steps.
Solution Approach 2:
The print substrate layer serves multiple functions: it provides a printable surface for decoration, acts as an adhesive carrier to bond the bulk layer to outer layers, and enables customization. This multi-functionality reduces the need for additional components, thereby limiting complexity increase.
3Strength
If the print substrate paper has high density for mechanical stability, then the strength is improved, but the print quality may be affected by surface roughness
Solution Approach 1:
The patent applies local quality by treating the print substrate layer differently from the bulk layer. The print substrate is designed with high density and controlled surface roughness specifically in the printing area to ensure both mechanical stability and print quality, while other layers maintain their own optimized properties.
Solution Approach 2:
The patent specifies precise parameter ranges for the print substrate: density between 650-850 kg/m³, surface weight of 70-100 g/m², and Cobb value of 20-30 g/m². These parameter changes optimize both mechanical stability and surface smoothness for high-quality printing, resolving the contradiction between strength and print quality.
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
Enables cost-effective differentiation of packaging materials with maintained mechanical strength and print quality, allowing for late customization and varying appearances without increasing production costs or material waste, while ensuring package integrity and long-term storage capabilities.
Implementation Method 1
a print substrate paper, adhered to the outer side of the bulk material layer by means of 1-4 g/m2 adhesive, dry weight
Implementation Method 2
an outermost, transparent and protective thermoplastic polymer layer arranged on the outside of the bulk material layer
Implementation Method 3
an innermost, heat sealable and liquid-tight thermoplastic polymer layer
Data Source
AI summary
The present invention relates to a laminated liquid food packaging material, comprising a bulk layer of paper or carton or other cellulose-based material and outer layers of thermoplastic polymers on both sides, having a decorative print pattern arranged beneath one of the outer thermoplastic polymer layers. The invention further relates to the method for manufacturing the laminated packaging material and to a packaging container for liquid food packaging, comprising the laminated packaging material.