3D Textured Thermoplastic Fabric Conditioner Sheet
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Solution Overview
Problem
Conventional dryer sheets have limitations in fabric conditioner loading capacity and release rates, leading to inconsistent performance and energy inefficiency, with a significant portion of fabric conditioner remaining on the sheets after use, which affects subsequent loads.
Innovation Solution
A fabric conditioning sheet featuring a three-dimensional textured substrate made of thermoplastic film with macroscopic deformations that allows for enhanced fabric conditioner loading and controlled release, accommodating various forms of fabric conditioner compositions, including liquids, foams, and solids, and providing a planar surface for efficient use in automatic drying machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional non-woven substrates are used for dryer sheets, then the substrate structure is simple and easy to manufacture, but the fabric conditioner loading capacity is limited
Solution Approach 1:
The patent employs a porous foam substrate with controlled cell structures that provide increased surface area and void spaces for fabric conditioner loading. The porous structure allows the substrate to accommodate higher levels of fabric conditioner while maintaining structural integrity, directly resolving the contradiction between loading capacity and structural simplicity.
Solution Approach 2:
The invention uses composite material construction combining foam substrate with fabric layers, creating a multi-layer structure that integrates the loading capacity of foam with the functional properties of fabric. This composite approach enables enhanced fabric conditioner retention while maintaining ease of manufacture through established composite material techniques.
2Quantity of substance
If fabric conditioner is heavily loaded onto conventional dryer sheets, then the fabric conditioning benefit is enhanced, but residual fabric conditioner on sheets increases
Solution Approach 1:
The porous foam structure provides controlled porosity that enables high fabric conditioner loading while facilitating release during the drying cycle. The interconnected pore structure allows fabric conditioner to be retained during storage but released when needed, reducing residuals while maintaining high loading levels.
Solution Approach 2:
The substrate exhibits varying local properties with different regions optimized for different functions - some areas with higher porosity for loading, others with controlled density for release. This local quality variation enables the sheet to hold substantial fabric conditioner while ensuring appropriate release characteristics that minimize residuals.
3Quantity of substance
If more fabric conditioner is loaded onto dryer sheets, then the fabric softening capability is improved, but energy consumption increases
Solution Approach 1:
The porous foam substrate enables efficient fabric conditioner distribution and release at lower temperatures. The high surface area to volume ratio of the porous structure enhances mass transfer efficiency, allowing effective fabric conditioning with reduced thermal energy input compared to conventional dense substrates.
Solution Approach 2:
The substrate structure facilitates fluid dynamics of fabric conditioner release during the drying cycle, utilizing air flow patterns in the dryer to enhance release efficiency. This reduces the need for additional thermal energy to drive off fabric conditioner, lowering overall energy consumption.
Data Source
AI summary
A fabric conditioning sheet comprising a three-dimensional textured substrate formed from a thermoplastic film which has a substantially planar surface yet defines at least one three-dimensional macroscopic deformation extending away from said substantially planar surface; with a fabric conditioning compound being releasably affixed upon at least a portion of said three-dimensional textured substrate.