Light-colored full-shading blind fabric and preparation method therefor
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Solution Overview
Problem
Existing light-colored blinds effectively reflect solar radiant heat but cause glare due to high visible light transmittance, while dark-colored blinds absorb heat but block light, creating a trade-off between thermal insulation and glare reduction.
Innovation Solution
A light-colored full-shading blind fabric is developed using shading warp and weft yarns made of polyester core threads with matte PVC coating, forming a plain weave with apertures less than 1%, combining high tension and matte finish to achieve both solar heat reflection and light absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light-colored blind fabrics are used, then solar radiant heat reflection is improved, but visible light transmittance increases causing glare
Solution Approach 1:
The patent applies different surface qualities to different parts of the fabric structure. The outer surface uses light-colored PVC coating for heat reflection, while the inner woven structure creates local shading zones that block visible light. This local differentiation allows the fabric to reflect solar heat while simultaneously blocking glare-causing visible light transmission.
Solution Approach 2:
The patent combines multiple materials with complementary properties: light-colored PVC coating for thermal reflection, dark-colored fibers for light absorption, and a woven structure for geometric shading. This composite approach enables the fabric to achieve both heat reflection and glare reduction functions that single materials cannot provide alone.
2Illumination intensity
If dark-colored blind fabrics are used, then visible light absorption is improved, but solar radiant heat absorption increases reducing thermal insulation
Solution Approach 1:
The patent restricts dark-colored light-absorbing materials to specific local zones within the fabric structure, rather than using them throughout. The dark fibers are embedded within the woven structure where they provide glare blocking, while the outer light-colored surface maintains thermal reflection. This localized application prevents excessive heat absorption.
Solution Approach 2:
The patent creates a composite structure where dark-colored absorbing fibers are combined with light-colored reflective coating. The dark fibers absorb visible light to prevent glare, while the light-colored outer layer reflects solar radiant heat. This material combination resolves the trade-off between light absorption and heat reflection.
3Illumination intensity
If fabric density is increased to reduce apertures for full shading, then light-blocking performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes the aperture ratio parameter to less than 1% while maintaining a practical woven structure. By carefully controlling the warp and weft yarn densities and their arrangement, the fabric achieves full shading performance without requiring overly complex weaving patterns. The parameter optimization balances performance requirements with manufacturing feasibility.
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 fabric achieves full shading by minimizing gaps and eliminating gloss, resulting in a light-colored blind that balances thermal insulation and glare reduction, with improved tension and smooth surfaces.
Implementation Method 1
the matte PVC coating layer has a color that is 1/12 standard depth scale less than that of the knitted product... a color difference ΔE is formed between the polyester core thread and the matte PVC coating layer, and values of ΔE are all greater than 1.0
Implementation Method 2
a contact surface between the polyester core thread and the matte PVC coating layer forms melt bonding
Implementation Method 3
enabling an extrudate to pass through cooling water, where the cooling water has a temperature of 8-25° C.
Implementation Method 4
the shading warp yarns and the shading weft yarns are woven to form gaps with apertures less than 1%
Data Source
AI summary
The present invention discloses a light-colored full-shading blind fabric, including shading warp yarns and shading weft yarns which form a plain weave with the shading warp yarns, where they are both made of shading core threads, each shading core thread includes a polyester core thread with a color that is 1/12 standard depth scale greater than that of a knitted product and a matte PVC coating layer coating the polyester core thread, a contact surface between the polyester core thread and the matte PVC coating layer forms melt bonding, and the shading warp yarns and the shading weft yarns are woven to form gaps with apertures less than 1%. The light-colored full-shading blind fabric and a preparation method therefor can achieve the effect of reflecting solar radiant heat, maintaining room temperature provided by light-colored blinds, absorbing visible light and forming full shading provided by dark-colored blinds.