Hook Fastener Strips on Insulation Boards to Minimize Warpage
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Solution Overview
Problem
The challenge lies in efficiently attaching a hook layer to insulation boards without causing warpage and edge fraying, particularly with polyisocyanurate foam, which is costly and difficult in traditional manufacturing processes, and requires modifications to cutting equipment.
Innovation Solution
The methods involve adhering or pre-attaching hook fasteners in a striped pattern or on a facer roll, allowing for partial coverage, which reduces material usage and minimizes warpage, and can be done on the production line or by a third-party converter, using existing laminator equipment without additional adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hook fasteners are attached to insulation boards using traditional gluing methods, then the hook layer can be securely attached, but the production cost increases and production capacity is constrained
Solution Approach 1:
The patent extracts the hook fastener layer from the insulation board manufacturing process by allowing it to be attached separately at the jobsite. This separation removes the constraint of needing specialized gluing equipment during production, thereby reducing manufacturing costs and increasing production capacity while maintaining secure attachment through proper adhesive application at installation.
Solution Approach 2:
The patent applies preliminary action by pre-attaching the hook fastener layer to the insulation board in a controlled manufacturing environment using adhesives, rather than requiring complex mechanical attachment systems. This preliminary bonding enables subsequent easy handling and installation while maintaining strong attachment, resolving the contradiction between secure attachment and manufacturing ease.
2Area of stationary object
If the hook layer is applied over the entire surface of the insulation board, then complete coverage is achieved, but material cost increases and warpage occurs
Solution Approach 1:
The patent segments the hook fastener layer into multiple narrow strips positioned side-by-side with spaces between them, rather than applying a continuous full-coverage layer. This segmentation reduces the total amount of hook fastener material needed, lowering material costs, and minimizes the adhesive application area, thereby reducing warpage and edge fraying of the insulation board.
Solution Approach 2:
The patent applies local quality by concentrating the hook fastener strips in specific zones where they are needed for attachment, rather than uniformly covering the entire surface. This localized application optimizes material usage and reduces the overall impact on board flatness while maintaining functional effectiveness.
3Area of stationary object
If the hook layer strips are positioned close to the edge of the board, then maximum attachment area is achieved, but edge fraying occurs requiring equipment modification
Solution Approach 1:
The patent applies preliminary anti-action by deliberately positioning the hook fastener strips away from the extreme edges of the insulation board, preventing edge fraying before it occurs. This proactive positioning avoids the need to modify cutting equipment to address fraying or warping at the edges, maintaining manufacturing simplicity while preserving sufficient attachment area for structural integrity.
Data Source
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AI summary
Methods for attaching a layer of hook fasteners onto an insulation board for use attaching a roofing membrane having fleece backed loops thereon such that the roofing membrane can be held onto the insulation membrane by: adhering the hook layer onto portions of the top or bottom facer of an insulation board after the insulation board has exited a laminator; or adhering the hook layer onto the top or bottom facer prior to entry into the laminator; or replacing the top or bottom facer of the insulation board with the hook layer before use in the laminator.