Foamed Opacifying Layer for Thermal Transfer Blackout Fabrics
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Solution Overview
Problem
Traditional blackout materials for draperies are multi-layered, unsuitable for thermal transfer printing, prone to off-gassing, and suffer from delamination and poor image quality due to heat absorption by carbon black layers, which complicates the transfer of sublimable inks.
Innovation Solution
A foamed, opacifying element with a single dry opacifying layer on a porous substrate, composed of porous particles, a binder material, surfactant, low water content, and opacifying colorants, allowing for thermal colorant transfer without carbon black, ensuring durability and efficient light blocking while minimizing noxious fumes and image quality issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional multi-layered blackout materials with carbon black are used, then light blocking is achieved, but thermal transfer printing quality deteriorates due to heat absorption and delamination
Solution Approach 1:
The patent removes carbon black and other problematic materials from the blackout layer composition. The specification explicitly states that the blackout layer comprises 'no carbon black, no titanium dioxide, no metal flake, no glass bead, no plasticizer, no volatile organic compound (VOC)' and is 'substantially free of' these substances. This extraction eliminates the heat absorption and delamination issues that plagued traditional multi-layered blackout materials, enabling successful thermal transfer printing while maintaining light blocking performance.
Solution Approach 2:
The patent employs a composite blackout layer formulation combining acrylic polymer, acrylic copolymer, and acrylic oligomer in specific proportions (acrylic polymer 20-40%, acrylic copolymer 30-50%, acrylic oligomer 10-30%). This composite material achieves both light blocking and thermal transfer compatibility without requiring carbon black or multiple layers, resolving the contradiction between illumination blocking and manufacturing precision.
2Illumination intensity
If traditional blackout materials are used, then light blocking is provided, but off-gassing and delamination occur during thermal processing
Solution Approach 1:
The patent fundamentally changes the compositional parameters of the blackout layer by eliminating VOCs, plasticizers, and carbon black that cause off-gassing and delamination. The specification requires the blackout layer to be 'substantially free of' these problematic substances and to contain specific polymer components in controlled proportions. This parameter change ensures material stability during thermal processing while maintaining light blocking functionality.
Solution Approach 2:
The patent applies local quality by creating a blackout layer with uniform, controlled composition throughout, avoiding the heterogeneous structure of traditional multi-layered materials. The specification defines precise compositional ranges for each component (acrylic polymer 20-40%, acrylic copolymer 30-50%, acrylic oligomer 10-30%) to ensure consistent local properties that prevent delamination and off-gassing during thermal transfer printing.
3Illumination intensity
If carbon black is included in blackout materials, then opacity is improved, but thermal transfer printing becomes difficult due to heat absorption
Solution Approach 1:
The patent explicitly extracts and removes carbon black from the blackout layer composition. The specification states the blackout layer comprises 'no carbon black, no titanium dioxide, no metal flake' and is 'substantially free of' these substances. This extraction eliminates the heat absorption problem that prevented successful thermal transfer printing while maintaining opacity through alternative acrylic-based formulations.
Solution Approach 2:
The patent replaces carbon black with a composite acrylic-based material system (acrylic polymer, acrylic copolymer, acrylic oligomer) that provides opacity without the heat absorption characteristics of carbon black. This composite material achieves the desired optical properties while being compatible with thermal transfer printing processes.
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 provides a self-lined, durable, and efficient light-blocking drapery with improved flexibility and drapeability, enabling effective thermal transfer printing without delamination or off-gassing, while maintaining desired opacity and image quality.
Implementation Method 1
each porous particle comprising a continuous polymeric phase and a first set of discrete pores dispersed within the continuous polymeric phase
Implementation Method 2
the dry opacifying layer has a light blocking value of at least 4
Implementation Method 3
The inks used for preparing the printed pattern contain colorants that are selected to sublime at a temperature that does not compromise the integrity of the fabric or textile substrate
Implementation Method 4
a dry foamed composition disposed on the internal surface, the dry foamed composition comprising: (a) at least 0.1 weight % and up to and including 40 weight % of porous particles
Data Source
AI summary
A foamed, opacifying element has a thermal colorant image on either an opposing external surface and an internal surface of a porous substrate. The internal surface has a dry foamed composition disposed thereon as a dry opacifying layer that comprises: (a) 0.1-40 weight % of porous particles; (b) at least 10 weight % of an at least partially cured binder material; (c) at least 0.2 weight % of one or more additives comprising a surfactant; (d) less than 5 weight % of water; and (e) at least 0.002 weight % of an opacifying colorant different from all of the one or more (c) additives, which opacifying colorant absorbs predetermined electromagnetic radiation. The thermal colorant image is derived from thermal colorant transfer of sublimable colorants from a thermal donor element.