Antimony-Free PET Resin in Absorbent Articles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Absorbent articles, such as diapers and sanitary napkins, face challenges in using antimony-free PET resin due to the yellowish color it produces, which consumers perceive as low quality, especially when in direct contact with delicate skin, and concerns about environmental and health impacts from antimony traces.
Innovation Solution
Incorporating a nonwoven material with PET resin that has less than 150 ppm of antimony, covered by one or more layers on both the wearer-facing and garment-facing surfaces to conceal the yellowish color, ensuring the PET resin does not form the surface of the absorbent article, thereby maintaining skin safety and consumer acceptance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If antimony-free PET resin is used to reduce health and environmental risks, then the harmful factors are reduced, but the PET resin develops a yellowish color that consumers perceive as low quality
Solution Approach 1:
A white nonwoven material is introduced as an intermediary layer between the yellowish antimony-free PET resin and the wearer's skin. This intermediate layer optically masks the yellowish color while allowing the antimony-free PET resin to fulfill its protective function. The white nonwoven material acts as a visual barrier that conceals the undesirable coloration without interfering with the resin's safety benefits.
Solution Approach 2:
The patent applies color masking by introducing a white colored layer (the nonwoven material) that counteracts the yellowish color of the antimony-free PET resin. This color modification approach changes the overall appearance from yellowish to white, making the product acceptable to consumers while preserving the antimony-free composition.
2Illumination intensity
If the PET resin is covered by white nonwoven material to conceal the yellowish color, then the color appearance is improved, but the device structure becomes more complex
Solution Approach 1:
The white nonwoven material serves multiple functions simultaneously: it acts as a structural component of the absorbent article, provides the desired white color appearance, and functions as a barrier that masks the yellowish color of the antimony-free PET resin. By combining these functions in a single material layer, the patent avoids adding extra complexity while achieving the color improvement goal.
3Object-affected harmful factors
If antimony-free PET resin is used, then health and environmental safety is improved, but the manufacturing cost increases due to the specialized resin
Solution Approach 1:
The white nonwoven material, which is a standard industry material already in use for other purposes in absorbent articles, is leveraged to simultaneously address the color issue. This allows the manufacturing process to maintain efficiency while achieving the dual benefit of using antimony-free resin and maintaining acceptable appearance, thereby minimizing the additional manufacturing cost.
Data Source
AI summary
The present disclosure relates to absorbent articles comprising a nonwoven material, the nonwoven material comprising PET resin having less than 150 ppm of antimony. One or more layers of cover materials are covering the nonwoven material both on the wearer-facing surface and on the garment-facing surface, such that the nonwoven material does not form a wearer-facing or garment-facing surface of the absorbent article.