Backing Layer Coating for Insulation Panels
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Solution Overview
Problem
Existing multi-layer insulation construction panels with mineral finishing layers have low fire-resistance, making them unsuitable for high fire-resistance classifications and lacking water-repellent properties, which are increasingly required in building construction.
Innovation Solution
A backing layer comprising a fibrous reinforcing layer coated with a compound containing polymer resin in aqueous dispersion, inorganic shell-powder fillers, and inorganic flame-retardant fillers like aluminum hydroxide or magnesium hydroxide, providing fire-resistance, water-repellence, and mechanical stability while maintaining flexibility and windability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mineral finishing layer is used for fire resistance, then fire-resistant properties are improved, but water-repellent properties deteriorate
Solution Approach 1:
The patent applies composite materials by combining organic polymer resin with inorganic fillers (calcium carbonate, talc, mica) and hydrophobic additives to create a coating layer that simultaneously achieves fire resistance, water repellency, and mechanical durability. This composite approach resolves the contradiction by integrating multiple functional properties into a single material system rather than using separate mineral and water-repellent layers.
Solution Approach 2:
The patent changes the chemical and physical parameters of the coating material by using polymer resin in aqueous dispersion with specific solid content ranges (30-70%), controlled particle size distributions of fillers (0.1-2 mm), and hydrophobic surface treatments. These parameter modifications enable the coating to exhibit both fire-resistant characteristics and water-repellent properties without the limitations of traditional mineral-based coatings.
2Ease of manufacture
If the backing layer is made thin and flexible for winding, then ease of manufacture and storage are improved, but mechanical resistance and dimensional stability deteriorate
Solution Approach 1:
The patent uses composite materials comprising polymer resin combined with reinforcing inorganic fillers (calcium carbonate, talc, mica) to achieve high mechanical strength in a thin coating layer. The synergistic interaction between the polymer matrix and filler particles provides exceptional tensile strength, flexural resistance, and dimensional stability while maintaining coating thickness within 0.5-5 mm, enabling both flexibility for winding and mechanical durability.
Solution Approach 2:
The patent applies local quality by creating a coating layer with non-uniform filler distribution and varying resin concentrations to optimize different regions for specific functions. The coating maintains flexibility in areas requiring bending while providing enhanced mechanical resistance in load-bearing zones, resolving the contradiction between thin-film flexibility and overall structural strength.
3Reliability
If traditional mineral coating materials are used, then fire resistance is improved, but water-repellent properties and adhesion to fibrous layer deteriorate
Solution Approach 1:
The patent employs composite materials where polymer resin serves as the binding matrix with inorganic fillers dispersed throughout. This composite structure provides superior adhesion to the fibrous reinforcing layer through the polymer's bonding capabilities while maintaining fire resistance through the inorganic filler content. The combination resolves the contradiction by integrating both adhesive functionality and fire-resistant properties within a single coating system.
Solution Approach 2:
The patent uses polymer resin as an intermediary material that bridges the fibrous reinforcing layer and the inorganic filler particles. This intermediary substance provides strong adhesion to the fibrous substrate while supporting and distributing fire-resistant inorganic materials, thereby achieving both good bonding strength and fire resistance without the poor adhesion characteristics of traditional mineral coatings.
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 achieves fire-resistance classification in high Euro-classes and significantly reduces water absorption, enhancing the panel's performance in thermal and acoustic insulation applications.
Implementation Method 1
inorganic fillers consisting of shell-powder corpuscles
Implementation Method 2
inorganic flame-retardant fillers selected from the group consisting of aluminum hydroxide, magnesium hydroxide
Implementation Method 3
at least one polymer resin in aqueous dispersion
Implementation Method 4
coating having water-repellent and fire-resistant properties
Data Source
Figure 1
AI summary
The invention relates to a backing layer (10) for a multi-layer insulation construction panel (100), and to the manufacturing method thereof. Such a backing layer comprising: - a reinforcing layer (1) made of fibrous material, - at least one coating layer (2) for the reinforcing layer. Such a coating layer (2) is obtained by applying a compound to the reinforcing layer (1) comprising: - at least one polymer resin in aqueous dispersion, - inorganic fillers consisting of shell-powder corpuscles, - inorganic flame-retardant fillers selected from the group consisting of aluminum hydroxide, magnesium hydroxide, and then drying.