Stand-up Pouch Inspection Area for Light-Protected Visual Quality Control
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Solution Overview
Problem
Stand-up pouches for detergents and cleaning agents that protect contents from light hinder visual quality control, as they become non-transparent, making it impossible to inspect the contents after packaging.
Innovation Solution
A stand-up pouch made from a composite film with a transparent or translucent inspection area at the bottom, where the side walls are opaque and metallized to prevent light penetration, allowing for visual inspection while protecting the contents from light exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the bag is made opaque to protect contents from light, then light protection is improved, but visual quality control becomes impossible
Solution Approach 1:
The bottom wall is segmented into two distinct zones: an inspection area that is transparent or translucent to allow visual quality control, and a protected area that remains opaque to protect light-sensitive contents. This spatial segmentation resolves the contradiction by allowing both functions to coexist in different regions of the same bag.
Solution Approach 2:
Different optical properties are applied to different locations of the bag. The inspection area has high light transmittance (T > 0.5 in visible range) to enable visualization, while the side walls and protected areas have low light transmittance (T < 0.1 in UV+visible range) to protect contents. This local differentiation of material properties resolves the contradiction between protection and inspection.
2Difficulty of detecting and measuring
If the inspection area is made transparent, then visual quality control is improved, but light protection of contents is reduced
Solution Approach 1:
The bottom wall is divided into an inspection area with transparent or translucent properties and a protected area with opaque properties. This segmentation allows the inspection area to provide visual access while the protected area maintains light barrier function, resolving the contradiction between transparency for inspection and opacity for protection.
Solution Approach 2:
The bag employs locally differentiated optical properties: the inspection area uses materials with high transmittance (T > 0.5) for visibility, while surrounding areas use materials with low transmittance (T < 0.1) for light protection. This local quality approach allows both transparent inspection and light protection to coexist without compromising either function.
3Difficulty of detecting and measuring
If the side walls are made translucent for inspection, then visual quality control is improved, but light protection is reduced
Solution Approach 1:
The side walls are designed with low light transmittance (T < 0.1 in UV+visible range) to maintain light protection, while the bottom inspection area uses high transmittance materials (T > 0.5 in visible range) for visualization. This local differentiation resolves the contradiction by concentrating inspection functionality in the bottom area while preserving light protection in the side walls.
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 effective visual quality control of the contents without exposing them to light, ensuring product integrity and allowing for detection of liquid presence through contrast, even in pre-portioned packs with low material usage and reduced environmental impact.
Implementation Method 1
the side wall has a transmittance in the entire UV+ visible wavelength range of less than 0.1, preferably less than 0.01
Implementation Method 2
the inspection area has a transmittance (T) in the entire visible wavelength range of more than 0.5, preferably more than 0.8
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a self-standing bag for receiving washing and/or cleaning agents, comprising a cavity (2) which is delimited by at least one side wall (3) and a bottom wall (4), characterized in that the bottom wall (4) has an inspection region (7) for the detection of liquid when said liquid is in contact with the inner side of the bottom wall (4), and wherein the side wall (3) is opaque, the bag being formed from a one-piece film composite (8).