Phase Change Agent Tissue for Skin Cooling
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Solution Overview
Problem
Existing skin cooling products, such as lotions and creams, often require direct contact with the skin and may not provide a consistent cooling sensation, whereas dry tissue products can offer a novel method to impart cooling without direct skin contact, leveraging phase change agents to absorb body heat and provide comfort.
Innovation Solution
Incorporating a temperature change composition with phase change agents into dry tissue products, such as facial or bath tissues, which undergo a phase change when heated by the body, allowing for a cooling sensation without transferring chemicals to the skin, and potentially evoking a sensation of wetness for improved cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If phase change agents are incorporated into dry tissue products, then cooling sensation is provided without direct chemical contact with skin, but the product complexity increases
Solution Approach 1:
The dry tissue product acts as an intermediary carrier that delivers cooling sensation through phase change agents without requiring direct application of chemicals to the skin. The tissue web serves as a mediator between the cooling agent and the skin, allowing heat absorption through the tissue barrier.
Solution Approach 2:
Phase change agents are incorporated into the tissue product that undergo phase transition (solid to liquid) at skin temperature ranges (20-35°C). This phase change absorbs heat from the skin, providing cooling sensation without the need for direct chemical contact or active pumping mechanisms.
2Ease of operation
If phase change agents are used in bath tissue, then sensation of wetness is evoked for improved cleaning perception, but the product may become less effective for its primary drying function
Solution Approach 1:
The cooling composition is applied selectively to specific areas of the bath tissue rather than uniformly throughout. This allows localized cooling and wetness sensation where it provides cleaning perception benefits, while other areas of the tissue maintain their absorbent drying capabilities.
Solution Approach 2:
The phase change agents in the composition undergo phase transition during use, absorbing heat and creating a sensation of wetness that enhances perceived cleaning. This phase change occurs after the primary drying function is accomplished, allowing both functions to coexist effectively.
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 dry tissue products effectively provide a cooling sensation and comfort to irritated skin, enhancing user experience by absorbing body heat and maintaining a cooling effect, while also potentially improving the perception of cleaning when used as bath tissues.
Implementation Method 1
a temperature change composition which includes at least one phase change agent that undergoes a phase change when heated by the body
Implementation Method 2
the phase change agent absorbs body heat given off by the user and undergoes a phase change which, in turn, provides a cooling sensation to the skin
Data Source
AI summary
Wiping products, such as facial tissues, contain a temperature change composition that can provide a cooling sensation when contacted with the skin of a user. The temperature change composition, for instance, can contain one or more phase change agents that undergo a phase change at slightly elevated temperatures. The phase change agents, in one embodiment, can have a relatively high heat of fusion. When undergoing a phase change, the phase change agents absorb heat and thereby provide a cooling feeling to the skin of a user. In one embodiment, the phase change agent comprises a straight chain hydrocarbon. Hydrocarbons useful as phase change agents include an octadecane, a nonadecane, a heptonoate, or mixtures thereof.