Fiber-Reinforced Cellular PVC for Thermal Expansion Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Previous attempts to improve the suitability of cellular PVC for exterior systems, particularly its resistance to temperature-induced expansion and contraction, were unsuitable as the reinforcement used did not effectively convey the desired resistance, and the bonding of reinforcement to cellular PVC was deficient.
Innovation Solution
The use of continuous fibers bonded to cellular PVC, oriented in a specific direction within the material, provides resistance to temperature-induced expansion and contraction by being coated with a bonding agent and integrated during the extrusion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If continuous fibers are added to cellular PVC to improve rigidity and temperature stability, then resistance to temperature-induced expansion and contraction is improved, but manufacturing complexity increases
Solution Approach 1:
The patent creates a composite material by embedding continuous fibers within the cellular PVC matrix. This composite structure combines the temperature stability and rigidity of fibers with the durability and weather resistance of cellular PVC, directly resolving the contradiction by achieving improved temperature stability through material composition rather than complex manufacturing processes.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the cellular PVC by incorporating fibers at specific orientations and densities. By changing the material composition parameters (fiber content, fiber orientation, fiber type), the patent achieves enhanced temperature stability while maintaining manufacturability through controlled parameter adjustment rather than complex manufacturing changes.
2Strength
If reinforcement is added to cellular PVC to improve rigidity, then strength is improved, but bonding between reinforcement and cellular PVC becomes deficient
Solution Approach 1:
The patent introduces a bonding agent or surface treatment as an intermediary between the fiber reinforcement and the cellular PVC matrix. This intermediary layer ensures effective adhesion and stress transfer between the reinforcement and the base material, resolving the bonding deficiency while maintaining the strength benefits of fiber reinforcement.
Solution Approach 2:
The patent develops a composite material system where the interface between fiber and matrix is optimized for bonding. By carefully selecting fiber types, surface treatments, and matrix composition, the patent achieves both high strength through reinforcement and reliable bonding between the components.
3Duration of action of stationary object
If cellular PVC is used for exterior siding, then durability and rot resistance are improved, but dimensional stability under temperature changes deteriorates
Solution Approach 1:
The patent creates a composite material that combines cellular PVC with continuous fibers having low thermal expansion coefficients. This composite structure maintains the durability and rot resistance of cellular PVC while the fiber reinforcement compensates for thermal expansion, achieving both durability and dimensional stability simultaneously.
Solution Approach 2:
The patent addresses thermal expansion by incorporating fibers with complementary thermal expansion properties into the cellular PVC matrix. The fiber reinforcement constrains the thermal expansion of the PVC, maintaining dimensional stability while preserving the durability benefits of the cellular PVC material.
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 fiber-reinforced cellular PVC exhibits enhanced stability against temperature-induced changes, maintaining dimensional integrity and performance in exterior applications.
Implementation Method 1
the at least one continuous fiber is coated with a bonding agent that bonds the at least one continuous fiber to the cellular PVC
Data Source
AI summary
The present invention relates to exterior siding, trim and rigid architectural assemblies for buildings.