Exothermic Heating Composition for Odor-Stable Body Warmers
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Solution Overview
Problem
Disposable body warmers generate unpleasant odors and changes in aroma due to their exothermic composition, which affects user experience and fragrance retention, especially during storage.
Innovation Solution
Incorporating a metal ion sequestrant into the exothermic composition housed in an air-permeable container bag, along with an oxidizable metal powder, water-soluble salt, and optional oxidation accelerators or water-retaining agents, to suppress odor generation and aroma changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fragrance is added to a heating tool that uses a disposable body warmer, then the desired aroma can be enjoyed, but the aroma changes over time and unpleasant odors are generated
Solution Approach 1:
A metal ion sequestrant is introduced as an intermediary substance between the fragrance and the exothermic composition. This sequestrant binds metal ions that would otherwise catalyze degradation reactions, thereby protecting the fragrance from changing while allowing the heating function to operate normally.
Solution Approach 2:
The harmful metal ions are effectively removed from the reactive system by the metal ion sequestrant, which selectively binds them. This extraction of the harmful catalytic agents prevents them from causing aroma degradation and unpleasant odor generation.
2Ease of operation
If the heating tool is stored for a certain period before use, then it can be used conveniently later, but unpleasant odors and aroma changes occur during storage
Solution Approach 1:
The metal ion sequestrant is pre-added to the exothermic composition before storage. This preliminary action ensures that metal ions are bound and neutralized before any degradation reactions can occur during storage, preventing unpleasant odors and aroma changes in advance.
Solution Approach 2:
The metal ion sequestrant performs a preliminary anti-action by binding metal ions that would otherwise catalyze harmful reactions during storage. This preemptive binding prevents the generation of unpleasant odors and aroma degradation before they can occur.
3Power
If the exothermic composition is designed for effective heat generation, then the heating effect is sufficient, but characteristic odors are generated that are unpleasant to users
Solution Approach 1:
The metal ion sequestrant converts the harmful effect of metal ions (which cause unpleasant odors) into a beneficial effect by binding these ions. This allows the exothermic composition to maintain its effective heating performance while eliminating the unpleasant odor generation.
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
Effectively maintains desired aromas and suppresses unpleasant odors even after storage, while maintaining sufficient exothermic heating effects, ensuring a pleasant user experience.
Implementation Method 1
the use of a metal ion sequestrant in a heating tool can suppress the generation of unpleasant odors, as well as changes in aroma in the heating tool even after storage
Implementation Method 2
disposable body warmers use an exothermic composition that generates heat in the presence of air
Implementation Method 3
an exothermic composition containing a metal ion sequestrant, an oxidizable metal powder, a water-soluble salt, and water
Implementation Method 4
at least the exothermic composition is housed in an air-permeable container bag
Data Source
AI summary
The present invention provides an excellent heating tool in which the generation of unpleasant odors is suppressed. The present invention also provides an excellent heating tool in which changes in aroma are suppressed. The present invention further provides an excellent heating tool in which the generation of unpleasant odors and changes in aroma are suppressed even after storage. The present invention provides a method for suppressing the generation of unpleasant odors and changes in aroma in a heating tool. The present invention provides a heating tool comprising an exothermic composition containing a metal ion sequestrant, an oxidizable metal powder, a water-soluble salt, and water, wherein at least the exothermic composition is housed in an air-permeable container bag.