FSK Insulation Facing Laminate Moisture Resistance
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Solution Overview
Problem
Current FSK facing sheet material laminates for insulation products experience deformation and wrinkling, known as 'dimpling', when exposed to high heat and humidity due to moisture absorption by the kraft paper layer, leading to a visually unappealing surface and reduced dimensional stability.
Innovation Solution
The FSK facing sheet material laminate incorporates a paper composite sheet layer with humectants, synthetic, and/or inorganic fibers, which reduces moisture absorption and internal stresses, maintaining dimensional stability and preventing wrinkling, while also including flame retardants and fungi growth inhibitors for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If kraft paper sheet layer is used in FSK facing sheet material laminate, then the laminate provides good surface aesthetics and handleability, but the kraft paper sheet layer absorbs moisture under high heat and humidity conditions causing deformation and wrinkling (dimpling)
Solution Approach 1:
The patent modifies the paper sheet layer by incorporating synthetic fibers (polyester, polypropylene, acrylic) and inorganic fibers (glass fibers) to change the material composition parameters. This hybrid fiber composition reduces moisture absorption while maintaining surface aesthetics, preventing the dimpling effect that occurs with pure kraft paper under high heat and humidity conditions.
Solution Approach 2:
The patent creates a composite paper sheet layer by combining natural kraft paper fibers with synthetic and inorganic fibers. This composite structure leverages the advantages of each material: the aesthetic and handleability qualities of kraft paper combined with the dimensional stability and moisture resistance of synthetic and inorganic fibers, thereby preventing deformation and wrinkling under humid conditions.
2Object-affected harmful factors
If foil or metallized polyester film layer is used as inner layer, then the laminate provides flame spread resistance, but the rigid foil layer creates internal stresses when bonded with expanding kraft paper under humidity
Solution Approach 1:
The patent changes the properties of the paper sheet layer by adding synthetic and inorganic fibers, which significantly reduces moisture absorption and expansion under humidity. This parameter change in the paper layer's dimensional stability prevents the development of internal stresses that would otherwise occur between the rigid foil layer and the expanding kraft paper, while maintaining flame spread resistance.
3Stability of the object's composition
If humectants are added to paper composite sheet layer, then moisture absorption is reduced and dimensional stability is enhanced, but the laminate requires additional components and processing
Solution Approach 1:
The patent incorporates synthetic and inorganic fibers directly into the paper sheet layer composition during the paper manufacturing process. This approach integrates the moisture resistance function into the base material itself rather than adding separate humectant layers or coatings, thereby achieving dimensional stability without significantly increasing laminate composition complexity.
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 laminate retains its initial smooth appearance under high heat and humidity conditions, reducing deformation and wrinkling, and exhibits improved flame spread resistance and mold/mildew resistance, making it suitable for frequent exposure to such conditions.
Implementation Method 1
the paper composite sheet layer includes synthetic and/or inorganic fibers so that when the facing sheet material is exposed to conditions of high heat and humidity, the paper composite sheet layer exhibits enhanced dimensional stability and reduced deformation and wrinkling
Implementation Method 2
an adhesive bonding the foil or metallized polymeric film sheet, the paper composite sheet layer, and the scrim together
Implementation Method 3
The faced insulation products of the subject invention that are faced with the FSK facing sheet material laminate of the subject invention include pipe insulation, duct board, duct wrap insulation, metal building insulation, and other building insulation products
Data Source
AI summary
A facing laminate for insulation products includes: a foil or metallized polymeric film sheet layer forming an inner layer of the laminate that is adapted be bonded directly to a surface of an insulation product; a paper composite sheet layer, which may include synthetic and/or inorganic fibers, forming an outer exposed layer of the laminate; and a scrim intermediate and bonded to the foil or metallized polymeric film sheet and paper composite sheet layers. The facing laminate may include a humectant and/or a water, oil, and/or grease repellant component. The paper composite sheet layer of the laminate exhibits greater dimensional stability and reduced wrinkling when the laminate is exposed to conditions of high humidity. Insulation products to be faced with this facing laminate include pipe insulation, duct board, duct wrap insulation, metal building insulation, and other building insulation products.