Warming Material Temperature Control Using Phase-Change Aliphatic Compounds

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Solution Overview

Problem

Existing warming materials face challenges in achieving stable temperature control, leading to safety issues such as low temperature burns and variations in heating temperatures due to environmental factors, and are costly to produce with conventional air-permeable films.

Innovation Solution

A temperature control agent comprising aliphatic compounds with specific melting points and solubility is used to regulate heat generation, combined with a heat-generating composition containing metallic powder, salt, water, and activated carbon, within a packaging material that can be air-permeable or airtight, allowing for precise temperature control and safety enhancements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If air-permeable packaging material is used to control oxygen inflow, then heat generation characteristics can be controlled, but production cost increases and temperature stability deteriorates

Engineering Contradiction:

Improvetemperature stabilityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent uses a disposable temperature control agent (sacrificial metal powder) that reacts with oxygen and is discarded after use, replacing expensive and complex air-permeable films while achieving reliable temperature control at lower cost

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the approach from controlling physical parameters of packaging material (air permeability) to controlling chemical reaction parameters (oxygen consumption rate via temperature control agent), achieving better temperature stability without increasing production cost

Inventive Principle:

Principle #35Parameter changes

2Reliability

If air-permeable packaging material with controlled ventilation is used, then heat generation characteristics improve, but temperature control precision deteriorates due to pin holes and usage variations

Engineering Contradiction:

Improveheat generation characteristicsVSAvoidtemperature control precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The temperature control agent acts as an intermediary between oxygen and the heat-generating composition, chemically mediating the oxygen supply to achieve precise temperature control without relying on physical packaging precision

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical control system (air-permeable film with controlled porosity) with a chemical control system (temperature control agent that reacts with oxygen), eliminating issues related to pin holes and manufacturing precision

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If conventional temperature control methods are used, then heat generation can be managed, but safety deteriorates due to temperature variations from environmental factors

Engineering Contradiction:

Improveheat generation managementVSAvoidsafety risk from temperature variation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The temperature control agent provides negative feedback by consuming excess oxygen when temperature rises, automatically regulating the heat generation process and eliminating safety risks from environmental temperature variations

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The temperature control agent preliminarily reacts with oxygen to prevent excessive heat generation before it occurs, counteracting the harmful effect of temperature variation from the start

Inventive Principle:

Principle #9Preliminary anti-action

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 warming material with stable temperature control, reducing the risk of low temperature burns and ensuring consistent heating regardless of environmental conditions, while being cost-effective and safe for various applications, including medical use.

Implementation Method 1

one or more aliphatic compounds having a melting point of 35° C. to 65° C.

Methodology Applied

Scientific EffectPhase change: Phase Change

Implementation Method 2

generates heat by oxidation heat generation upon reaction of metal with oxygen

Methodology Applied

Scientific EffectOxidation heat generation: Oxidation

Data Source

PatentUS12551367B2Temperature control agent, and heating composition, packaging material, and warming material each comprising same

Publication Date: 2026.02.17 FERRIC INC

AI summary

A means for controlling the temperature of a warming material includes an air-permeable film or the like. The warming material includes the temperature control means and a heating composition. The temperature control means for controlling the heating temperature of the warming material includes one or more aliphatic compounds that have a melting point of 35-65° C. and a solubility in water (g/100 mL) at 20° C. of 5 or less.