Polymer Composite Sheathing Board Structural Design
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Solution Overview
Problem
Current building wall and ceiling systems face challenges with sheathing boards that are heavy, difficult to handle, and cut, lacking durability, moisture resistance, flame spread resistance, and good bonding surfaces, which affect installation and service life.
Innovation Solution
Polymer-based composite structural sheathing boards with a polymer core layer and facers for reinforcement, including a low-density insulation layer and higher-density reinforcement layers, along with nonwoven reinforcement mats and bonded facers, provide enhanced dimensional stability, strength, and improved physical properties such as thermal and acoustical performance, moisture resistance, and flame spread resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional sheathing boards (plywood, hardboard, particleboard, gypsum board) are used, then structural strength is achieved, but weight increases and handling difficulty increases
Solution Approach 1:
The patent applies composite materials by combining polymer foam core layers with fabric reinforcement layers and facer layers to create a sheathing board that achieves structural strength without the weight penalty of traditional wood-based or gypsum boards. The polymer foam provides lightweight structural support while the fabric and facer layers add strength and surface quality.
2Area of stationary object
If traditional sheathing boards are used, then coverage is achieved, but moisture absorption increases and fungus growth resistance decreases
Solution Approach 1:
The patent changes the material parameters by using polymer foam instead of traditional wood-based or gypsum materials, which fundamentally alters the moisture absorption characteristics. The polymer foam structure inherently resists moisture absorption and fungus growth while maintaining coverage capability.
3Reliability
If traditional sheathing boards are used, then flame spread rating is achieved, but flame spread resistance decreases
Solution Approach 1:
The patent changes the material composition to polymer foam with inherent fire-resistant properties, improving flame spread resistance while maintaining acceptable flame spread ratings. The polymer material and its structure provide better fire performance compared to traditional wood-based sheathing boards.
4Stability of the object's composition
If polymer-based composite sheathing boards with facers are used, then dimensional stability improves and fastener pull through strength increases, but device complexity increases
Solution Approach 1:
The patent uses composite materials with fabric reinforcement layers embedded within the polymer foam and facer layers bonded to the surfaces. This composite structure provides dimensional stability and fastener pull-through strength while the layers work together as an integrated system.
5Use of energy by moving object
If polymer-based composite sheathing boards are used, then thermal and acoustical properties improve, but manufacturing complexity increases
Solution Approach 1:
The patent employs composite materials where the polymer foam core provides thermal and acoustical insulation properties, while the fabric reinforcement and facer layers are integrated during the manufacturing process. The multi-layer composite structure achieves superior thermal and acoustical performance through the combined properties of its components.
Data Source
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AI summary
A polymer-based composite structural sheathing board for use in the formation of a building wall and/or ceiling system by overlaying and being secured to a structural building wall and/or ceiling frame, comprising: (i) a polymer material foam insulation core layer (60,70); (ii) a first polymer material solid or foam reinforcement layer (72,62) having a higher density than the insulation core layer; (iii) the insulation core layer and the first reinforcement layer each having a length, a width, and a thickness; (iv) the insulation core layer and the first reinforcement layer each having a first major surface and a second major surface that are defined by the length and the width of the insulation core layer and the first reinforcement layer respectively; and (v) a reinforcement sheet (64,74) located between the insulation core layer and the first reinforcement layer.