Thermoplastic Facemask with Glass Transition for Custom Fit
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Solution Overview
Problem
Existing facemasks often cause discomfort due to pressure, obscure the mouth, and are disposable, leading to high turnover and environmental issues.
Innovation Solution
A custom-fit, reusable facemask made from a clear thermoplastic polymer with adjustable shape and removable filters, allowing airflow and visibility of the mouth, reducing pressure and waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure is applied to deform the facemask to fit a user's face, then the air seal is improved, but user comfort deteriorates
Solution Approach 1:
The patent applies parameter changes by utilizing the glass transition temperature of thermoplastic polymer to enable the facemask to be heated and reshaped. The facemask body is made from a thermoplastic polymer with a glass transition temperature between 60-90°C, allowing it to be softened by heat (e.g., from hot water or a hair dryer) and molded to conform to the user's face, creating a custom fit without requiring excessive strap tension.
2Object-affected harmful factors
If the facemask is made opaque to ensure privacy, then privacy is improved, but communication ability deteriorates
Solution Approach 1:
The patent applies local quality by making the facemask body transparent rather than opaque. The facemask is constructed from a transparent thermoplastic polymer that allows observers to see through it, thereby maintaining the ability to understand speech and read facial expressions while still providing protection. This transparency is applied uniformly across the entire facemask body, eliminating the need for opaque sections.
3Reliability
If disposable facemasks are used to reduce contamination risk, then hygiene is improved, but environmental impact and cost deteriorate
Solution Approach 1:
The patent applies discarding and recovering by making the facemask body reusable and washable. The facemask can be removed, washed, and reused multiple times, reducing waste and environmental impact compared to disposable facemasks. Additionally, the filter element is designed to be removable and replaceable, allowing users to discard only the contaminated filter while retaining the reusable facemask body, thus optimizing resource utilization and reducing overall waste.
4Strength
If the facemask is made from rigid material to maintain structure, then structural integrity is improved, but adaptability to different face shapes deteriorates
Solution Approach 1:
The patent applies parameter changes by utilizing the thermal properties of the thermoplastic polymer. The facemask body is made from a thermoplastic polymer with a glass transition temperature between 60-90°C, allowing it to be softened by heat and molded to different face shapes. After cooling, the polymer retains the new shape, providing both structural integrity and adaptability to various face geometries.
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 facemask provides a comfortable, adjustable fit, improves communication by keeping the mouth visible, and reduces environmental impact through reusability and minimized material use.
Implementation Method 1
the thermoplastic polymer has a glass transition temperature of less than about 100 degrees Celsius, such that the facemask is configured to be heated by a user in order to adjust the facemask from a first shape to a second shape
Data Source
AI summary
A facemask is provided that is made from a clear thermoplastic polymer with a sufficiently low glass transition temperature that a customer may engage in post-sale customization of the facemask. The facemask is configured to be heated and then reshaped by the customer, so as to better fit the customer's face. The facemask may include filter cavities or filter adaptors that conveniently hold removable filters. Methods of manufacturing a set of a plurality of facemasks, matching a customer to an appropriately sized facemask, and then enabling the customer to engage in post-sale customization are also provided.