Non-slip Cotton Sanitary Pad with Silicone Friction Layer
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Solution Overview
Problem
Conventional disposable sanitary napkins contain harmful chemical substances that can cause skin irritation and menstrual irregularities, and cotton sanitary pads face issues with preventing longitudinal movement, leading to menstrual blood leakage during daily activities.
Innovation Solution
A non-slip cotton sanitary pad design featuring a stacked cotton lining, absorption pad, and waterproof cover with thermally fused silicone non-slip members on the waterproof cover to prevent movement in all directions, using snap buttons or hook-and-loop closures for wing fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If cotton material is used for the sanitary pad to reduce harmful chemical substances, then skin safety and comfort are improved, but the pad loses adhesive capability and becomes prone to movement
Solution Approach 1:
The sanitary pad is divided into distinct functional layers: a cotton lining layer for skin contact, an absorption layer for menstrual blood, and a waterproof cover layer for leakage prevention. The wings are separated as independent fastening components. This segmentation allows each layer to optimize its specific function without compromising others.
Solution Approach 2:
The waterproof cover layer acts as an intermediary between the absorption layer and the underwear. It provides a non-slip surface that contacts the underwear to prevent longitudinal movement, while the cotton lining provides a safe skin-contact surface. This intermediary structure resolves the contradiction by decoupling the skin safety function from the fixing function.
2Reliability
If disposable adhesive materials are used to fix the pad to underwear, then fixing capability is improved, but harmful chemical substances increase
Solution Approach 1:
The harmful adhesive component is extracted and removed from the system. Instead of using chemical adhesives, the invention uses mechanical fastening components (wings with snap buttons or hook-and-loop closures) that provide fixing capability without introducing harmful chemicals into contact with the skin or underwear.
Solution Approach 2:
The wings and fastening components are designed as simple, inexpensive mechanical elements that can be easily attached and detached. This disposable-style mechanical fastening system provides reliable fixing during use without the need for persistent chemical bonding agents.
3Ease of manufacture
If the pad structure is simplified for ease of manufacture, then manufacturing cost is reduced, but the ability to prevent movement in all directions deteriorates
Solution Approach 1:
The wing structure is designed asymmetrically, extending from the sides of the pad body at specific angles and lengths optimized for fastening. The non-slip members are positioned asymmetrically on the waterproof cover to specifically address longitudinal movement. This asymmetric design provides enhanced movement prevention in critical directions while maintaining manufacturing simplicity.
Solution Approach 2:
Non-slip members are applied locally to specific areas of the waterproof cover rather than uniformly across the entire pad. This localized application provides targeted friction enhancement where it is most needed (at the interface with underwear) while minimizing additional manufacturing complexity and material costs.
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 prevents menstrual blood leakage during various activities by limiting movement in all directions, reducing skin irritation, and promoting comfort and convenience similar to wearing cotton underwear.
Implementation Method 1
The non-slip member is made of a silicone material, and may be thermally fused to the waterproof cover
Implementation Method 2
the pair of wings protruding from both sides of the pad body includes a fastener so that the wings are fastened together in a folded state on the same surface
Implementation Method 3
an absorption pad and a waterproof cover are sequentially stacked
Data Source
AI summary
Disclosed is a non-slip cotton sanitary pad, including a pad body, configured such that a cotton lining, an absorption pad and a waterproof cover are sequentially stacked, and a pair of wings protruding from both sides of the pad body, wherein the pair of wings protruding from both sides of the pad body includes a fastener so that the wings are fastened together in a folded state on the same surface, the cotton sanitary pad is disposed such that the waterproof cover contacts underwear, and the waterproof cover includes a non-slip member on the surface contacting the underwear.