Vacuum-Metallized Woven Fabric for Flexible Thermal Insulation
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Solution Overview
Problem
Existing metallized fabrics are inflexible and have an unpleasant texture, limiting their application in protective clothing and infrared reflector devices, which require both thermal insulation and a pleasant touch.
Innovation Solution
A process involving washing, calendering under high temperature and compressive force, followed by vacuum metallization of a woven substrate with fine synthetic fibers and a dense weave, to produce a flexible and shiny metallized fabric with improved thermal insulation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a metal film is bonded to a fabric support, then thermal insulation properties are improved, but flexibility and texture quality deteriorate
Solution Approach 1:
The patent replaces mechanical bonding of metal film with vapor phase deposition. Instead of physically bonding a separate metal film to the fabric, metal atoms are deposited directly onto the fabric surface in vapor form, creating a metallized fabric where the metal layer is intimately integrated with the textile structure, thereby maintaining flexibility while achieving thermal insulation.
Solution Approach 2:
The patent changes the physical state of metal application from solid film bonding to vapor phase deposition. By controlling deposition parameters such as vacuum level, deposition temperature, and metal source temperature, a thin, flexible metal layer is formed that conforms to the fabric structure, resolving the contradiction between thermal performance and flexibility.
2Object-affected harmful factors
If a metal film is bonded to a fabric support, then infrared reflection capability is improved, but the fabric becomes rigid and unpleasant to touch
Solution Approach 1:
The patent replaces mechanical film bonding with vapor phase metallization. The metal is deposited as vapor that condenses directly onto the fabric fibers, creating a discontinuous, fine metal layer that reflects infrared radiation while preserving the fabric's inherent softness and flexibility, unlike rigid bonded metal films.
Solution Approach 2:
The patent creates an ultra-thin metal layer through vapor deposition that acts as a flexible infrared-reflective coating. This thin metallized layer conforms to the fabric's flexibility and drape, unlike thicker bonded metal films that rigidify the material, thereby maintaining comfort and wearability while providing infrared protection.
3Quantity of substance
If electroless deposition of metallic particles is used, then metal coating is achieved, but the fabric loses flexibility and gains unpleasant texture
Solution Approach 1:
The patent replaces electroless deposition with vapor phase deposition. Instead of using chemical reactions to deposit metal particles that can clump and stiffen the fabric, metal vapor is deposited directly, forming a more uniform, thinner, and flexible metal layer that maintains fabric drape and comfort while achieving adequate coverage.
Solution Approach 2:
The patent changes the deposition mechanism from solution-based electroless deposition to vapor phase deposition. By controlling vapor deposition parameters, a thinner and more flexible metal layer is achieved compared to electroless deposition, which tends to produce thicker, more rigid coatings that compromise fabric flexibility.
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 process results in a metallized fabric with enhanced flexibility, pleasant texture, and effective thermal insulation, suitable for protective clothing and infrared reflector applications.
Implementation Method 1
calendering of the substrate by applying a compressive force under high temperature
Implementation Method 2
calendering of the substrate by applying a compressive force under high temperature
Implementation Method 3
vacuum metallization of the substrate by deposition a layer of metal under a rarefied atmosphere
Data Source
AI summary
The invention relates to a method for producing a metallised fabric, including a step of washing a woven substrate, the method including, after the washing step, the following steps: calendering the substrate by applying a compression force to the substrate, and vacuum-metallising the substrate in a rarefied atmosphere by depositing metal particles so as to form a layer of metal on the substrate.