Sublimation Transfer Sheet Seam Absorption
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Solution Overview
Problem
In sublimation decoration, the visibility of seams and blurring issues arise due to manufacturing tolerances and the malleability of paper transfer sheets, which result in uneven dye distribution and image quality on objects with curved surfaces.
Innovation Solution
A sublimation transfer sheet with a paper release layer and an absorbent backing layer is used, where the backing layer is positioned between overlapping edge portions to absorb excess dye, reducing seam visibility and blurring by minimizing dye transfer to the object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the transfer sheet is wrapped around the object with overlapping edges to ensure complete coverage, then the decoration coverage is improved, but the seam becomes darker and wider due to doubled dye concentration
Solution Approach 1:
The patent extracts the problematic overlapping edge portions from the transfer sheet design. By making the transfer sheet width substantially equal to the object perimeter, the edges do not overlap, thereby eliminating the source of excess dye concentration and seam darkening while maintaining complete coverage through precise dimensional matching.
Solution Approach 2:
The patent applies local quality by creating a seam barrier layer specifically at the seam region where edges would overlap. This localized intervention prevents dye transfer only at the seam area while allowing normal dye transfer in the rest of the decoration area, thus resolving the seam visibility issue without affecting overall coverage.
2Ease of operation
If the transfer sheet is held loosely against the object to accommodate manufacturing tolerances, then the ease of application is improved, but the image becomes blurry due to greater distance between dyes and object surface
Solution Approach 1:
The patent employs a flexible transfer sheet made of thin film material that can conform to the object surface while maintaining close contact. The flexibility allows accommodation of manufacturing tolerances in both the transfer sheet and object, ensuring the sheet can be applied easily without requiring perfect dimensional matches, while the thin film nature maintains proximity to the surface for sharp image transfer.
3Manufacturing precision
If the transfer sheet dimensions are made exact to minimize seams, then the seam visibility is reduced, but the manufacturing precision requirements become impossible to meet due to zero tolerance needs
Solution Approach 1:
The patent changes the dimensional parameter of the transfer sheet width to be substantially equal to the object perimeter rather than slightly larger. This parameter adjustment eliminates the need for overlapping edges and the associated seam problems, while being achievable with normal manufacturing tolerances. The seam barrier layer is also introduced as a parameter change in the transfer sheet structure to further control seam formation.
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 effectively reduces the visibility of seams and blurring in the final image by preventing excess dye from reaching the object, resulting in a more uniform and clear decoration on objects.
Implementation Method 1
the backing layer is positioned between overlapping edge portions to absorb excess dye
Implementation Method 2
the sublimation dyes are transferred at the molecular level into the object substrate, by sublimation and/or liquification
Data Source
AI summary
A sublimation transfer sheet assembly including a first layer and an dye or ink layer positioned on a first side of the first layer. The first layer and the dye or ink layer being positioned such that when the sublimation transfer sheet assembly is wrapped about an object with the dye or ink layer facing the object, a first edge portion of the sublimation transfer sheet assembly is overlapped by a second edge portion of the sublimation transfer sheet assembly, and the first edge portion is interposed between the second edge portion and the object.