Vacuum Infusion Polyurethane Composite Drying
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for preparing polyurethane composite materials are inefficient in drying core materials, leading to prolonged processing times and increased moisture reversion, which affects the production efficiency and quality of composite materials used in wind turbine blades and other applications.
Innovation Solution
A method involving the partial covering of core materials with desiccants, such as molecular sieves, during the drying process under vacuum conditions, followed by the introduction of a polyurethane resin reaction system, which reduces dehumidification time and maintains drying efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If core materials are dried in advance to remove moisture, then the quality of composite materials is improved, but the processing time is prolonged and production efficiency is reduced
Solution Approach 1:
Molecular sieves are placed on the core material surface before the vacuum infusion process begins. This preliminary placement of desiccant allows moisture removal to occur concurrently with other preparation steps, rather than requiring separate advance drying time. The molecular sieves actively adsorb moisture from the core material during the stand-by period, maintaining low moisture content without extending the overall processing schedule.
Solution Approach 2:
Molecular sieves act as an intermediary substance between the core material and the environment. These desiccants are placed in direct contact with the core material surface, creating a localized low-humidity microenvironment that prevents moisture reversion. The molecular sieves mediate the moisture transfer process by adsorbing water molecules from the core material pores, enabling effective drying without requiring prolonged exposure to vacuum or heat.
2Reliability
If core materials are dried thoroughly to prevent moisture reversion, then the reliability of the drying process is improved, but the time required for drying increases
Solution Approach 1:
Instead of applying uniform drying conditions across the entire core material volume, molecular sieves are placed specifically on the surface where moisture reversion is most likely to occur. This localized placement creates high-density desiccant zones at critical moisture-prone areas, providing targeted moisture protection where it is most needed. The surface placement ensures reliable moisture control at the interface between core material and environment without requiring prolonged drying of the entire material bulk.
Solution Approach 2:
The solution combines the core material with molecular sieves to create a composite drying system. The molecular sieves, with their unique porous structure and high surface area, provide superior moisture adsorption capabilities compared to conventional drying methods. This composite approach integrates the desiccant properties of molecular sieves with the structural properties of the core material, achieving reliable moisture control through the synergistic interaction between the two materials.
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
This approach significantly shortens dehumidification time, ensures high-quality composite materials with improved surface conditions, and enhances production efficiency while being environmentally friendly, particularly for large polyurethane products sensitive to water.
Implementation Method 1
at least partially covering the core material with at least a desiccant
Implementation Method 2
drying at least a core material
Implementation Method 3
drying for dehydrations required before introducing the resin reaction system
Data Source
AI summary
A method for treating a core material is provided. A method for preparing a composite material, the composite material prepared by the method, and the use thereof is also provided.