Heating implement
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Solution Overview
Problem
Conventional heating implements with fragrances face issues of reduced scent intensity due to location-dependent perfuming amounts and fragrance volatilization, leading to imbalanced heat generation, adhesive force, and aroma delivery.
Innovation Solution
A heating implement design featuring a first air-permeable sheet, a second air-impermeable sheet, a heating element with oxidizable metal and carbon, and a specific fragrance-to-carbon mass ratio, with adhesive layers strategically positioned to enhance air supply and prevent adhesive overlap, ensuring balanced fragrance, heat generation, and adhesive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fragrance content is increased to enhance aroma delivery, then aroma intensity is improved, but heat generation balance deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the fragrance-to-carbon component mass ratio within 0.05-0.5 and carbon component content within 0.5-2.0 mg/cm². This quantitative parameter optimization enables the heating implement to achieve both sufficient aroma delivery and balanced heat generation, resolving the contradiction between these two requirements.
2Strength
If adhesive layer is applied to enhance attachment, then adhesive force is improved, but air supply to heating element deteriorates
Solution Approach 1:
The patent applies local quality by creating a peripheral region without adhesive layer around the heating element, while maintaining adhesive layers in other areas for secure attachment. This localized adhesive distribution ensures sufficient air supply to the heating element for oxidation reactions while maintaining adequate adhesive force for body attachment.
3Temperature
If carbon component content is increased to improve heat generation, then heat generation is improved, but fragrance release deteriorates
Solution Approach 1:
The patent resolves this contradiction through parameter changes by establishing an inverse relationship control: when carbon component content is increased for improved heat generation, the fragrance content is proportionally adjusted to maintain the fragrance-to-carbon ratio within 0.05-0.5. This coordinated parameter optimization ensures both adequate heat generation and sufficient fragrance release.
4Object-affected harmful factors
If adhesive layer covers entire surface to prevent irritation, then skin contact comfort is improved, but positioning precision deteriorates
Solution Approach 1:
The patent applies local quality by providing adhesive layers in specific regions away from the peripheral region, creating distinct functional zones. The peripheral region without adhesive ensures air supply and reduces skin irritation, while adhesive regions provide secure attachment and positioning. This spatial differentiation resolves the contradiction between comfort and precision.
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 solution provides a heating implement that effectively balances fragrance release, heat generation, and adhesive force, maintaining aroma intensity and thermal performance across different body locations while minimizing irritation and improving user experience.
Implementation Method 1
heating implements, which are capable of generating heat through oxidation reactions of oxidizeable metals
Implementation Method 2
fragrance volatilization
Data Source
AI summary
A heating implement (1) for body of the present embodiment includes a first sheet (11) having air-permeability; a second sheet (12); a heating element (13), intermediately arranged between the first sheet (11) and the second sheet (12) and containing an oxidizeable metal and a carbon component; and a first adhesive layer (14) and a second adhesive layer (15) provided in one of external surfaces of the first sheet (11) which is applied to a wearer side, in which a region without adhesive layer, in which none of the first adhesive layer (14) and the second adhesive layer (15) is disposed, is provided in at least a part of an external circumference section of the first sheet (11), the following relations (a) and (b) are satisfied, and the heating implement is perfumed with a fragrance:(a) a mass ratio of a content of the fragrance to a content of the carbon component in the aforementioned heating implement (fragrance/carbon component) is equal to or higher than 0.2 and equal to or lower than 0.52; and(b) the content of the carbon component in the aforementioned heating implement is equal to or larger than 0.89 mg/cm2.