Trading Card UV Transfer Coating for Bubble Reduction
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Solution Overview
Problem
Existing methods for applying a holographic effect to trading cards result in uneven UV varnish application, bubble formation, and weak durability due to thin UV varnish coating layers, deteriorating the appearance and durability of the cards.
Innovation Solution
A method involving a UV transfer coating process that forms a thick UV varnish coating layer by applying UV varnish twice, using a UV lamp output of 2 to 3kW for the first curing and 2 to 5kW for the second curing, with static electricity removal and dust cleaning of the UV casting film, and precise flexo printing to enhance gloss and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a thin UV varnish coating layer is applied to trading cards, then the manufacturing process is simple and quick, but the coating is not uniformly applied, bubbles form, and durability is weak
Solution Approach 1:
The patent divides the single coating process into multiple sequential coating steps. The UV varnish is applied in multiple thin layers rather than one thick layer, with each layer being cured separately. This segmentation allows each layer to be uniformly applied and cured properly, eliminating bubbles and improving coating uniformity while maintaining manufacturing efficiency.
2Ease of manufacture
If a thin UV varnish coating layer is applied, then the manufacturing process is simple, but adhesive strength and durability are reduced
Solution Approach 1:
The patent applies preliminary actions by ensuring each UV varnish layer is completely cured before applying the next layer. The UV lamp curing step is performed thoroughly between coating applications to create a stable, adhesive surface for subsequent layers. This preliminary curing action prevents poor adhesion and enhances overall coating durability.
3Adaptability or versatility
If UV varnish is applied to trading cards with varying surface conditions, then the process can handle different printing conditions, but uneven coating and bubble formation occur
Solution Approach 1:
The patent applies partial coating actions multiple times rather than attempting to cover the entire surface uniformly in one application. Each coating pass covers the surface partially or completely, and subsequent passes address any missed areas or uneven regions. This multiple partial application approach ensures uniform coverage even on surfaces with varying printing conditions and surface tensions.
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 method produces trading cards with improved gloss, reduced bubbles, and enhanced adhesive strength, resulting in a more durable and aesthetically appealing product.
Implementation Method 1
irradiating UV to one side or both sides of the trading card to which the UV casting film has been attached, for a preset period of time to cure the UV varnish
Data Source
Figure 1~2(b)
Figure 3~4(b)
Figure 5A~5B
AI summary
A method for manufacturing a trading card with improved surface characteristics, comprising: a step 1 of supplying a trading card having a UV varnish coating layer formed thereon; a step 2 of printing and applying UV varnish on upper part of the UV varnish coating layer; a step 3 of attaching a UV casting film on upper part of the trading card having the UV varnish applied thereon; a step 4 of curing the UV varnish using a UV lamp; a step 5 of peeling the UV casting film.