Process for creating a sublimated printed heat-sealable applique
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Solution Overview
Problem
Existing appliques applied to polyester garments using dye sublimation face issues with dye migration and visible adhesive edges, leading to graphic degradation and undesirable appearance.
Innovation Solution
A three-layer adhesive composite comprising clear or pigmented polyurethane layers with a dye-migration-resistant and absorbing polymer layer, preventing dye migration and minimizing adhesive visibility, applied to a polyester fabric base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single-layer opaque adhesive is used to prevent dye migration, then dye migration is blocked, but the adhesive edge becomes visible and aesthetically undesirable
Solution Approach 1:
The adhesive system is divided into three distinct layers: a first adhesive layer for bonding, a second adhesive layer for opacity and dye migration resistance, and a third adhesive layer for heat sealing. This segmentation allows each layer to perform its specific function without the drawbacks of a single-layer system, preventing visible edges while blocking dye migration.
Solution Approach 2:
The invention uses a composite adhesive structure combining multiple adhesive layers with different properties. The first layer provides bonding strength, the second layer provides opacity and dye migration resistance, and the third layer provides heat sealing capability. This composite approach resolves the contradiction by integrating multiple functions into a unified system.
2Strength
If heat is applied to activate the adhesive, then the applique bonds to the garment, but dye migration from the garment to the applique occurs causing discoloration
Solution Approach 1:
The second adhesive layer acts as an intermediary barrier between the garment and the applique. This layer with high dye migration resistance intercepts and blocks dye molecules attempting to migrate from the garment through the adhesive system, allowing heat activation and bonding while preventing discoloration.
3Weight of moving object
If a lightweight single-layer adhesive is used, then the applique is lightweight and simple, but it cannot provide sufficient opacity to prevent show-through of garment material
Solution Approach 1:
The adhesive system is segmented into three functional layers, with the second layer specifically designed to provide opacity and prevent show-through. This segmentation allows the adhesive system to achieve sufficient opacity without requiring a single thick layer, maintaining lightweight properties while blocking garment material visibility.
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 maintains graphical integrity and aesthetic appeal by inhibiting dye migration and reducing adhesive visibility, ensuring a durable and visually pleasing applique application.
Implementation Method 1
thermally activated adhesive coating on one side
Implementation Method 2
thermally activated adhesive can be provided with a filler that can provide opacity
Implementation Method 3
the heat converts the solid ink dye into a gas for diffusion into the fibers of the fabric
Implementation Method 4
the heat converts the solid ink dye into a gas for diffusion into the fibers of the fabric
Implementation Method 5
temperatures in the range of 370-420° F. (188-216° C.) with dwell times of approximately 1 minute are typically required
Implementation Method 6
it causes the pores of the polyester fabric to open up
Data Source
AI summary
A process for producing a colorfast thermal applique using a polyester fabric blank, dye-sublimation printing a graphic image on the fabric blank, and calendar or heat-press laminating a multi-layer composite consisting of two opposing outer layer polyurethane adhesive sides with a middle layer or layers of die impeding and absorbing polymers adhered onto the unprinted side of the printed fabric blank. The multi-zone composite comprises a first layer of clear or pigmented polyurethane adhesive followed by a pigmented disperse die impeding and absorbing polymer layer or layers and a third clear layer of polyurethane adhesive. The first layer of the triple-layer adhesive is fused under combined temperature and pressure to the polyester blank until said first layers impregnates into said fabric blank. The fabric blank is then cut into a discrete finished applique which, upon application to a fabric substrate, does not substantially change the physical and visual characteristics of that substrate, including performance fabric substrates to which the applique is applied.