Protective Drainage Wrap with Capillary Channels
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Solution Overview
Problem
Existing protective wraps for buildings lack enhanced fluid handling capabilities and additional features to effectively manage moisture and air infiltration, particularly in areas around windows and doors, where traditional wraps often fail to provide adequate drainage and vapor permeability.
Innovation Solution
A protective drainage wrap system incorporating cross-woven or cross-laminate materials with hydrophilic capillarity-driven flow elements and a three-dimensional structure, featuring oriented drainage channels and a breathable solid layer, which utilizes capillarity and gravity-driven flow mechanisms to enhance drainage and evaporative drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If non-woven wraps are used, then vapor permeability is improved, but strength properties deteriorate
Solution Approach 1:
The patent combines non-woven material with woven reinforcement layers to create a composite wrap structure. The non-woven layer provides vapor permeability while the woven layers provide tensile strength and structural integrity, resolving the contradiction between vapor permeability and strength properties.
2Strength
If woven wraps are used, then strength properties are improved, but vapor permeability deteriorates
Solution Approach 1:
The patent creates a multi-layer composite where woven reinforcement layers providing strength are combined with non-woven layers providing vapor permeability. This allows the wrap to simultaneously achieve high tensile strength and effective vapor transmission.
3Object-generated harmful factors
If micro-perforations are added to allow moisture vapor passage, then vapor permeability is improved, but liquid water resistance deteriorates
Solution Approach 1:
The patent uses hydrophobic coatings applied selectively to specific regions of the wrap material, particularly at the micro-perforations and drainage channels. This local application of water-repellent properties allows vapor to pass through while preventing liquid water infiltration, resolving the contradiction between vapor permeability and liquid water resistance.
4Object-generated harmful factors
If drainage channels are created, then fluid handling is improved, but structural integrity deteriorates
Solution Approach 1:
The patent incorporates drainage channels within a composite structure that includes reinforcing woven layers. These layers provide the structural integrity needed to maintain channel geometry and prevent collapse while allowing effective fluid drainage through the designed pathways.
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 system provides improved fluid handling and moisture management by increasing drainage efficiency and promoting evaporative drying through capillarity and gravity-driven flow, while maintaining structural integrity and preventing water intrusion.
Implementation Method 1
A plurality of spaced apart, elongated drainage strands are supported on the front of the web and extending in the drainage direction, wherein the strands are hydrophilic
Implementation Method 2
which utilizes capillarity and gravity-driven flow mechanisms to enhance drainage and evaporative drying
Implementation Method 3
which utilizes capillarity and gravity-driven flow mechanisms to enhance drainage and evaporative drying
Data Source
AI summary
The present disclosure provides for protective drainage wraps having improved properties, including fluid handling and structural integrity. The protective material barrier constructions, such as wraps, provide protection to surfaces, such as walls of buildings. The present disclosure provides for methods of making, using, and installing such protective material barrier constructions.