Non-foamed aqueous composition, coated textile and method of making
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Solution Overview
Problem
There is a need to improve the quality of solar irradiance control and reduce glare inside a room from incident outside light, especially for white or near-white woven textiles used as window screens, without compromising the original visual appearance or changing the openness of the weave.
Innovation Solution
A non-foamed aqueous composition is applied to one side of a fabric substrate, comprising porous particles, a film-forming binder material with chlorinated polymers, a white inorganic particulate filler material, and white low-density particulate hydrated alumina, which forms a light-attenuating coating that reduces glare while maintaining privacy and original appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-colored window treatment is used, then more light is transmitted and the view from inside is improved, but glare increases and privacy is reduced
Solution Approach 1:
The patent applies a light-attenuating coating containing white inorganic filler materials (such as titanium dioxide) and hydrated alumina to the fabric substrate. These materials scatter and reflect light to reduce glare while maintaining a light-colored appearance that preserves the view from inside. The coating modifies the optical properties of the fabric to achieve both glare reduction and view maintenance simultaneously.
Solution Approach 2:
The invention uses a composite coating formulation combining multiple components: chlorinated polymer binder, porous particles, white inorganic filler materials, and hydrated alumina. This composite structure creates a multifunctional coating that reduces glare through light scattering while maintaining light transmission and preserving the fabric's original appearance and weave openness.
2Object-affected harmful factors
If a dark-colored window treatment is used, then glare is reduced and privacy is improved, but less light is transmitted and the view quality deteriorates
Solution Approach 1:
The patent employs light scattering particles (titanium dioxide and hydrated alumina) that create a bright, light-reflecting surface layer. This allows the treatment to appear light-colored and transmit sufficient light for good views while the scattering effect reduces glare by diffusing direct sunlight into diffuse light.
3Object-affected harmful factors
If a coating is applied to reduce glare, then solar irradiance control is improved, but the original visual appearance and openness of the weave may be compromised
Solution Approach 1:
The coating is applied selectively to control solar irradiance on the outer surface of the fabric while maintaining the original weave structure and openness factor. The light-attenuating properties are concentrated in the coating layer without altering the fundamental fabric architecture, preserving breathability and visual appearance.
Solution Approach 2:
The patent modifies the optical parameters of the fabric surface by adding a coating with specific refractive index materials (titanium dioxide with RI > 2.0 and hydrated alumina). This changes the light interaction properties (scattering and reflection) without changing the physical structure, openness, or visual appearance of the underlying fabric weave.
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 glare from incident sunlight while maintaining privacy and original visual appearance, without significantly altering the openness factor or weave of the fabric, thus providing improved solar irradiance control.
Implementation Method 1
a white inorganic particulate filler material having a refractive index (RI) greater than 2
Implementation Method 2
a white inorganic particulate filler material having a refractive index (RI) greater than 2
Implementation Method 3
porous particles present in an amount of at least 0.1 weight % and up to and including 20 weight %, each porous particle comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase
Implementation Method 4
a white low-density particulate hydrated alumina having a density of less than 4 and a median particle size of less than or equal to 3 μm
Data Source
AI summary
A non-foamed aqueous composition is applied to fabric substrates to provide non-foamed light-attenuating coatings in resulting coated fabric substrates that produce reduced outside light glare. The non-foamed aqueous composition has a 5-50% solids and a zero shear viscosity of 100-1000 mPa-sec at 25℃. This composition has: i) porous particles at 0.1-20 weight %, and optionally an opacifying colorant; ii) a film-forming binder material comprising at least a chlorinated polymer at 4-20 weight %; iii) a white inorganic particulate filler material having a refraction index (RI) greater than 2 and a median particle size of less than 1 µm, at 2-12 weight %; and iv) a white low-density particulate hydrated alumina having a median particle size of less than or equal to 3 µm, at 5-16 weight %. This non-foamed aqueous composition can be applied to fabric substrates to reduce outside light glare without changing inside light coloration and light-blocking properties.