UV-Blocking Fluid Pouch Layering for Bonding Strength
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Solution Overview
Problem
Existing packaging bags with pattern-printed layers fail to provide sufficient light-shielding for UV-curable contents, leading to potential hardening due to insufficient bonding between layers and inadequate UV protection.
Innovation Solution
A fluid package design featuring a pouch with an outer layer, an inner layer, a light-shielding layer, and a bonding layer, where the light-shielding layer is positioned between the outer and inner layers to block UV rays, and the bonding layer ensures strong adhesion around the light-shielding layer, preventing UV-induced hardening and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a pattern-printed layer is arranged between the base layer and the middle layer to provide light-shielding function, then UV protection is improved, but bonding strength between layers deteriorates due to the intervening layer
Solution Approach 1:
The patent segments the light-shielding function from the bonding function by creating separate layers: a light-shielding layer with UV-blocking properties and a bonding layer with adhesive properties. This segmentation allows each layer to optimize its specific function without compromising the other, resolving the contradiction between UV protection and bonding strength.
Solution Approach 2:
The patent introduces a dedicated bonding layer as an intermediary between the light-shielding layer and the outer/middle layers. This intermediary layer specifically addresses the bonding weakness caused by the intervening light-shielding layer, maintaining strong adhesion while preserving the UV protection function of the light-shielding layer.
2Object-affected harmful factors
If the light-shielding layer is positioned to cover the entire container compartment for sufficient UV protection, then UV shielding is improved, but bonding between layers deteriorates over a larger area
Solution Approach 1:
The patent segments the functional responsibilities by creating a dedicated bonding layer that spans the entire surface area where adhesion is needed. This bonding layer compensates for the reduced bonding capability of the light-shielding layer, allowing the light-shielding layer to maintain full coverage without compromising overall bonding strength.
Solution Approach 2:
The patent employs a composite multi-layer structure where each layer has specialized properties: the light-shielding layer provides UV protection while the bonding layer provides adhesion. This composite structure allows the system to achieve both full UV shielding coverage and sufficient bonding strength across the entire surface area.
3Object-affected harmful factors
If a multi-layer structure with light-shielding layer is used to prevent UV hardening, then content protection is improved, but device complexity increases
Solution Approach 1:
The bonding layer serves multiple functions: it provides adhesion between layers, compensates for the non-bonding light-shielding layer, and maintains structural integrity. This multi-functionality reduces the need for additional specialized layers, thereby limiting the increase in device complexity while maintaining content protection.
Solution Approach 2:
The patent changes the functional parameters of each layer to optimize performance: the light-shielding layer is designed with UV-blocking properties while the bonding layer is designed with adhesive properties. This parameter specialization allows the multi-layer structure to achieve content protection with minimal necessary complexity.
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 shields UV-curable contents from light, maintains strong bonding between layers, and allows for easy visual detection of leaks, while reducing the rigidity of the pouch for easier rolling and handling.
Implementation Method 1
The light-shielding layer is configured to block ultraviolet rays
Implementation Method 2
The bonding layer bonds the outer layer and the inner layer, with the light-shielding layer interposed between the outer layer and the inner layer
Data Source
AI summary
A fluid package, having a pouch with a compartment apartment delimited by a film and a spout, is provided. The film includes an outer layer, an inner layer, a light-shielding layer, and a bonding layer. An outer periphery of the light-shielding layer is located at a position on an inner side of outer peripheries of the outer layer and the inner layer, at one of a position same as an outer periphery of the container compartment and a position on an outer side with respect to the outer periphery of the container compartment. The light-shielding layer covers an entirety of the container compartment and blocks ultraviolet rays. The bonding layer bonds the outer layer and the inner layer with the light-shielding layer interposed there-between. The bonding layer includes a directly-bonded area, in which the outer layer and the inner layer are directly bonded, in a range surrounding the light-shielding layer.