Microencapsulated PCM Zones for Absorbent Article Thermal Regulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing absorbent articles do not effectively address temperature regulation in specific user areas, such as the crotch region, leading to discomfort due to temperature variations caused by body fluids and environmental conditions.
Innovation Solution
Incorporation of microencapsulated phase change materials (PCMs) in discrete, non-linear zones on the absorbent article, applied using an in-line synchronized printing technique, allowing for precise placement and concentration of PCM on the topsheet or backsheet layers to regulate temperature effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If microencapsulated phase change material is distributed throughout the entire absorbent core, then temperature regulation coverage is maximized, but manufacturing complexity and material consumption increase
Solution Approach 1:
The patent divides the absorbent article into multiple discrete zones (first zone, second zone, third zone) with different PCM concentrations or types, rather than uniform distribution. This segmentation allows targeted temperature regulation in specific areas (e.g., higher concentration in crotch region, lower in waist areas), reducing overall material consumption and simplifying manufacturing by treating different zones separately.
Solution Approach 2:
The patent applies different concentrations or types of microencapsulated PCM to different zones of the absorbent article based on local temperature regulation needs. The first zone may have higher PCM concentration for areas requiring stronger cooling, while the second zone has lower concentration for areas with moderate needs, optimizing both performance and manufacturing efficiency.
2Temperature
If microencapsulated phase change material is applied in large continuous zones, then temperature regulation effectiveness is improved, but precision of placement and material efficiency decrease
Solution Approach 1:
The patent divides the PCM application into discrete, separated zones rather than large continuous areas. Each zone is clearly defined with specific boundaries, allowing precise placement during manufacturing. The zones are positioned at specific locations (e.g., crotch portion, waist portion) with controlled dimensions, improving both placement precision and material efficiency.
3Ease of manufacture
If microencapsulated phase change material is distributed uniformly throughout the absorbent article, then manufacturing simplicity is maintained, but user comfort and temperature regulation performance decrease
Solution Approach 1:
The patent implements non-uniform PCM distribution with different concentrations or types in different zones tailored to specific user comfort needs. The first zone may target the crotch area for maximum comfort during active use, while the second zone addresses waist or hip areas. This local quality approach maintains manufacturing simplicity through a systematic zonation scheme while significantly improving user comfort through targeted temperature regulation.
4Adaptability or versatility
If discrete zones with non-linear boundaries are used for PCM placement, then user-specific temperature regulation is optimized, but manufacturing complexity increases
Solution Approach 1:
The patent divides the absorbent article into discrete zones with defined boundaries, where each zone can have different PCM properties. The non-linear boundaries are established based on the anatomical contours and thermal requirements of different body regions. This segmentation enables user-specific temperature regulation while maintaining manageable manufacturing complexity through systematic zone definition and replication.
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 precise placement of microencapsulated PCMs in absorbent articles provides enhanced thermal comfort by balancing temperature variations, offering cooling or heating as needed, thereby improving user experience and performance of the article.
Implementation Method 1
microencapsulated temperature-regulating phase change material
Implementation Method 2
phase change material (PCM)... microencapsulated phase change material
Data Source
Figure 1A~1B
Figure 2
AI summary
An absorbent article comprising at least a topsheet layer and a backsheet layer, each layer having a body facing surface and a garment facing surface, and longitudinal and transversal edges, the article having a longitudinal front portion, a longitudinal back portion and a crotch portion located between the front and the back portion, the article comprises a first zone of microencapsulated phase change material on a surface of a layer of the article, and wherein the first zone has a non-linear boundary in at least the transversal direction of the article.