Sublimation Printing Temperature Gradient for Heat-Sensitive Polymers
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Solution Overview
Problem
Sublimation printing processes damage heat sensitive polymer layers due to high temperatures, resulting in compromised color depth and color fastness, particularly in multilayer systems used for military, commercial, and aerospace applications.
Innovation Solution
A sublimation printing process for multilayer systems comprising a polyester top layer and a heat sensitive polymer layer, where a temperature gradient is applied to maintain the heat sensitive polymer layer below its melting temperature while the polyester top layer is above its glass transition temperature, ensuring dye diffusion without damaging the heat sensitive layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high temperature is applied for sublimation printing, then dye transfer efficiency is improved, but heat sensitive polymer layer is damaged
Solution Approach 1:
The patent applies different temperature conditions to different layers of the multilayer system. The polyester top layer is heated to sublimation temperature (180-230°C) to enable dye transfer, while the heat sensitive polymer layer is maintained at a lower temperature through thermal insulation or spacing, preventing damage to the polymer layer while ensuring effective dye transfer to the polyester layer.
Solution Approach 2:
The patent segments the thermal treatment process by spatially separating the heat sensitive polymer layer from the polyester top layer during sublimation printing. This segmentation allows independent temperature control - the polyester layer receives full sublimation heat while the polymer layer is protected through physical separation or insulating barriers.
2Manufacturing precision
If high temperature is applied for sublimation printing, then dye diffusion into polyester is improved, but color fastness deteriorates due to polymer layer damage
Solution Approach 1:
The patent implements local quality control by applying heat selectively to the polyester top layer while protecting the heat sensitive polymer layer. This localized thermal treatment ensures optimal dye diffusion into the polyester layer for high manufacturing precision, while simultaneously preserving the polymer layer's integrity to maintain color fastness and print reliability.
Solution Approach 2:
The patent introduces an intermediary protective measure between the heat source and the heat sensitive polymer layer. This intermediary (such as an insulating layer or spatial gap) allows the polyester top layer to reach sublimation temperatures for effective dye diffusion, while preventing excessive heat from reaching the polymer layer, thereby preserving both dye quality and color fastness.
3Manufacturing precision
If high temperature is applied for sublimation printing, then print quality is improved, but heat sensitive material integrity deteriorates
Solution Approach 1:
The patent applies local quality principles by creating a differentiated thermal environment within the multilayer system. The polyester top layer is heated to sublimation temperatures to achieve high print quality, while the heat sensitive polymer layer is maintained at lower temperatures through thermal insulation or spacing, preserving material integrity and preventing degradation.
Solution Approach 2:
The patent segments the multilayer system to allow independent thermal management. By physically separating or insulating the heat sensitive polymer layer from the polyester top layer, the system enables the polyester to undergo sublimation printing at high temperatures while the polymer layer remains thermally protected, maintaining both print quality and material stability.
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 approach allows for undamaged heat sensitive polymer layers with good print quality, color depth, and color fastness in multilayer systems, maintaining the integrity and performance of heat sensitive materials during the sublimation process.
Implementation Method 1
the polyester top layer is maintained at a temperature above its glass transition temperature to allow diffusion of the sublimation dye into the polyester top layer
Implementation Method 2
Sublimation refers to a process where a substance such as a dye moves from a solid to a gas state
Implementation Method 3
a temperature gradient is applied during sublimation printing such that the heat sensitive polymer layer is maintained at a temperature below its melting temperature
Data Source
AI summary
The present invention further relates a sublimation printing process of a multilayer system comprising a polyester top layer and at least one heat sensitive polymer layer whereby a temperature gradient is applied during sublimation printing such that the heat sensitive polymer layer is maintained at a temperature below its melting temperature and the polyester top layer is maintained at a temperature above its glass transition temperature to allow diffusion of a sublimation dye into the polyester top layer. The temperature gradient is maintained by using a heat sink element beneath the heat sensitive polymer layer. The temperature gradient can also be maintained by cooling the heat sink element. The cooling preferably occurs with a circulating coolant. The heat sink element comprises a polymer, a ceramic or a metal. The invention further relates to a sublimation printed multilayer system comprising a polyester top layer and at least one heat sensitive polymer layer. The present invention also relates to the multilayer system in the manufacturing of textile, tents, outdoor gear, apparel, clothing, bags, jackets, gloves.