Textured Beverage Container Surface via Ink Varnish Interaction
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Solution Overview
Problem
Beverage containers often have slick outer surfaces that are difficult to grasp, especially when wet, and existing solutions like lithography-based texturing are complex and do not provide a sufficient 'textured-feel' or grip improvement.
Innovation Solution
The development of beverage containers with a textured graphic on their outer surface, featuring a plurality of protrusions that are randomly oriented, with lateral dimensions of at least 1 mm and heights between 40 microns and 80 microns, formed by applying ink and varnish with different surface tensions and exposing them to heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If lithography is used to apply ink patterns and varnish to create texture, then a textured surface is formed, but the manufacturing process becomes complicated
Solution Approach 1:
The patent extracts and eliminates the lithography step from the manufacturing process. Instead of using lithography to apply ink patterns followed by varnish, the invention applies varnish directly to the container surface without any preliminary ink pattern application, thereby removing the complex lithography equipment and multi-step process while still achieving textured surface formation through varnish application alone
Solution Approach 2:
The varnish serves multiple functions: it provides both the textured surface morphology and the protective coating, eliminating the need for separate ink and varnish layers. The varnish application process simultaneously creates the tactile texture and provides surface protection, simplifying the manufacturing process by consolidating multiple functions into a single material and process step
2Ease of operation
If small protrusions of 30-35 microns are formed by varnish migration, then some grip improvement is achieved, but the surface remains slick when wet
Solution Approach 1:
The patent changes the physical parameters of the surface protrusions by controlling varnish application and drying conditions to create larger, more pronounced textures that maintain structural integrity when wet. The varnish is applied in controlled amounts and allowed to dry形成 protrusions with optimized dimensions that provide reliable grip even in wet conditions, unlike the smaller 30-35 micron protrusions that become slick when wet
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
This solution significantly enhances the grip and tactile 'textured-feel' of beverage containers, providing a more secure hold even when wet, while simplifying the manufacturing process by eliminating the need for lithography.
Implementation Method 1
The reaction may be caused by a difference in surface tension between the wet ink and the varnish. The difference in surface tension between the wet ink and the varnish may be at least 20 mN/m2.
Implementation Method 2
Applying heat to the varnish and the wet ink may cause air bubbles to form and pop to form dimples in an upper surface of at least some of the plurality of protrusions. Applying heat to the varnish and the wet ink may include exposing the beverage container to a temperature of between 175° C. and 230° C. for between 10 seconds and 60 seconds.
Implementation Method 3
Applying heat to the varnish and the wet ink may cause air bubbles to form and pop to form dimples in an upper surface of at least some of the plurality of protrusions.
Data Source
AI summary
The subject matter is directed to decorating containers, preferably beverage containers, to create a textured surface, which may include randomly oriented and/or patterned protrusions extending outward from, for example, a can body. The textured effect may be accomplished without the use of lithography to generate randomly oriented and shaped protrusions of various sizes, or may be accomplished using lithography to apply a pattern of inks on the container to form protrusions of predefined shapes and/or sizes. Using the techniques described the decorated can bodies have an increased “textured-feel” than previous textured can bodies. The decorative effect is created using inks that in combination with a varnish antagonistic to the ink result in the generation of protrusions having lateral dimensions greater than 1 mm and/or having heights of between 40 microns and 80 microns.