Protruded Varnish Layer Prevents Adhesive Film Water Stains
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Highly adhesive films, such as shrink films, adhere to smooth glossy printing surfaces, causing water-stained patterns when wrapped around packages with high smoothness, particularly those with glossy coatings or varnishes, leading to aesthetic issues.
Innovation Solution
A package design featuring a smooth glossy layer with a protruded transparent varnish layer printed in a specific shape and size to prevent film adhesion, maintaining the glossy appearance while preventing water-stained patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a smooth glossy layer is applied to provide a glossy feeling to the color ink layer, then the aesthetic appearance is improved, but water-stained patterns occur when wrapped with highly adhesive films
Solution Approach 1:
The invention applies a protruded varnish layer with specific surface characteristics (protrusions of 3-10 μm height) only in the glossy layer region, creating local quality differentiation. This allows the glossy feeling to be maintained in specific areas while preventing film adhesion problems only where needed, without affecting the overall aesthetic appearance.
Solution Approach 2:
The invention changes the physical parameters of the varnish layer by creating protrusions with controlled height (3-10 μm) and surface area ratios (5-20%). This parameter modification prevents direct contact between the film and the smooth glossy surface, eliminating water-stained patterns while preserving the glossy aesthetic through careful control of the protrusion dimensions.
2Object-affected harmful factors
If transparent varnish is printed to prevent film adhesion, then water-stained patterns are eliminated, but the glossy feeling of the color ink layer may be affected
Solution Approach 1:
The invention carefully controls the protrusion height (3-10 μm) and surface area ratio (5-20%) of the varnish layer to prevent film adhesion while minimizing impact on glossy appearance. These precise parameter settings ensure the protrusions are sufficient to prevent water-stained patterns but small enough to maintain the overall glossy feeling when viewed from a distance.
Solution Approach 2:
The invention applies protruded varnish coverage at a controlled ratio (5-20% of total surface area), which is partial coverage rather than complete coverage. This partial action is sufficient to prevent water-stained patterns through strategic placement of protrusions while leaving enough smooth glossy surface visible to maintain the aesthetic glossy feeling.
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 protruded varnish layer effectively prevents film adhesion to the glossy surface, eliminating water-stained patterns and maintaining the glossy appearance even when wrapped with highly adhesive films, ensuring a consistent aesthetic and functional outcome.
Implementation Method 1
When wrapping the package having a printing surface having high smoothness with a highly adhesive film such as a shrink film, the film is adhered to the printing surface
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention addresses the problem of providing a package that does not develop a water-stained appearance even when a package with a very smooth printed surface is wrapped with a closely adhesive film, and a printing method therefor. The package is provided with: a base sheet, which configures the main body of the package; a colored ink layer, which is obtained from at least one colored ink that has been applied on the base sheet; a smooth gloss layer that confers a glossy feel to the colored ink layer; and a protrusion layer in which a transparent varnish is printed as protrusions on the gloss layer under prescribed conditions that preserve the glossy feel of the colored ink layer.