Labeled Molded Container Light Contrast via Crushed Label Voids
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Solution Overview
Problem
Existing in-mold labeling methods for containers lack a high eye-catch effect due to limited stereoscopic visual effects and light transmission, primarily relying on thermal adhesiveness and surface decorations.
Innovation Solution
A labeled container with a thermally fused label featuring a flat portion, concave-convex pattern, and edge portion, where the label includes voids that are crushed during in-mold forming, enhancing light transmission and contrast by varying porosity levels, resulting in a brighter edge portion and increased eye-catch effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a protrusion is formed on an in-mold molded product by denting a mold, then stereoscopic visual effects are achieved, but the eye-catch effect is limited
Solution Approach 1:
The label is designed with a void structure that is crushed during in-mold forming, creating light transmission differences between the convex portion (with remaining voids) and the flat portion (with crushed voids). This porosity variation produces the desired light contrast and eye-catch effect while maintaining the stereoscopic shape.
Solution Approach 2:
The invention uses light transmission variation (optical property change) rather than color printing to create visual contrast. The convex portion appears brighter due to light transmission through voids, while the flat portion appears darker due to crushed voids, achieving a dynamic visual effect that responds to lighting conditions.
2Strength
If thermal adhesiveness resin layer is used to fuse the label, then the label is securely attached to the container, but light transmission and contrast are insufficient
Solution Approach 1:
The label incorporates a void structure that differentiates between the convex portion (with voids for light transmission) and the flat portion (with crushed voids for darkness). This porous design maintains adhesion strength while creating the necessary light contrast effect.
Solution Approach 2:
The label has different void structures in different regions: the convex portion retains voids for light transmission, while the flat portion has crushed voids for light blocking. This local quality variation achieves both adhesion and visual contrast requirements.
3Manufacturing precision
If the label surface is made flat for uniform printing, then printing quality is improved, but stereoscopic visual effects and light contrast are lost
Solution Approach 1:
The label surface has different characteristics in different regions: the convex portion has a void structure for light transmission, while the flat portion has a crushed void structure for light blocking. This allows uniform printing on the flat portion while creating light contrast through the void structure difference.
Solution Approach 2:
The label combines a base material layer with a void structure and a thermal adhesiveness resin layer. This composite structure enables both uniform printing on the flat portion and light contrast through the void structure in the convex portion.
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 achieves a significant increase in light contrast and eye-catch effect, with a void decrease ratio of 15-99%, making the convex and concave portions stand out brightly, thereby enhancing the container's design and visual appeal.
Implementation Method 1
the void in the label of the edge portion is likely to be crushed by heat and pressured applied from the resin
Implementation Method 2
the void in the label of the edge portion is likely to be crushed by heat and pressured applied from the resin
Implementation Method 3
the light transmission is improved at the edge portion of the obtained labeled molded container and the light contrast is obtained
Data Source
AI summary
Disclosed is a labeled molded container having a container main body and a label, wherein a label surface is provided with a flat portion, a concave-convex pattern, and an edge portion between the convex portion or concave portion and the flat portion, and wherein when observing the labeled molded container from a surface-side thereof by illuminating light from a backside of the container, the edge portion is seen brighter than the flat portion and the concave-convex pattern.