Concave Arc Elastic Wainscot for Sanitary Product Side Leakage
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Solution Overview
Problem
Existing sanitary napkins and panty-shape diapers face issues with side leakage and discomfort due to convex arc designs that do not effectively reduce contact surface area with the female pudendum and fail to efficiently manage menstrual flow.
Innovation Solution
A folded side-leakage-proof arc-shaped sanitary product wainscot is designed using an elastic air-permeable membrane with numerous holes, compounded with non-woven fabric strips without hot melt adhesive, forming a concave arc shape that reduces contact area and enhances air permeability, combined with a production line featuring high-temperature resistant anti-adhesion nano-coatings and controlled compounding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a convex arc wainscot is used to guide liquid to two sides, then liquid guidance is achieved, but the contact surface between the female pudendum and the sanitary napkin cannot be reduced and side leakage is not solved
Solution Approach 1:
The patent inverts the traditional convex arc wainscot design into a concave arc shape. This inversion allows the wainscot to wrap around the pudendum, creating a nest-shaped structure that reduces contact surface area while effectively preventing side leakage through the folded side wall configuration.
Solution Approach 2:
The patent creates a nest-shaped wainscot structure where the folded side wall forms a nested configuration around the pudendum. This nested structure reduces the contact surface between the sanitary napkin and the body while maintaining effective side leakage protection.
2Strength
If hot melt adhesive is used to compound non-woven fabric with elastic membrane, then bonding is achieved, but air-permeable holes are blocked
Solution Approach 1:
The patent extracts and removes the hot melt adhesive from the compounding process. Instead of using adhesive, the patent employs hot pressing to directly bond the non-woven fabric with the elastic membrane, thereby preserving the air-permeable holes and maintaining breathability.
Solution Approach 2:
The patent replaces the chemical bonding mechanism (hot melt adhesive) with a mechanical bonding mechanism (hot pressing). This substitution allows the non-woven fabric and elastic membrane to be compounded without blocking the air-permeable holes, maintaining both bonding strength and air permeability.
3Ease of manufacture
If elastic membrane is stretched during compounding, then compounding is achieved, but the non-woven fabric is stretched and distorted
Solution Approach 1:
The patent performs preliminary stretching of the elastic membrane before the compounding process. By pre-stretching the membrane to the desired shape and tension, the subsequent hot pressing compounding can be performed without additional stretching, thereby preventing distortion of the non-woven fabric and maintaining manufacturing precision.
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 effectively prevents side leakage, reduces contact area with the body, improves air permeability, and enhances comfort by using a concave arc shape and non-woven fabric compounding without hot melt adhesive, addressing the limitations of existing designs.
Implementation Method 1
the elastic air-permeable membrane rebounds and resets to impel the non-woven fabric strips located on two sides of the elastic air-permeable membrane to form a folded side-leakage-proof side wall
Implementation Method 2
two non-woven fabric strips are compounded without using a hot melt adhesive and without stretching a non-woven fabric when the elastic air-permeable membrane is under a tensile state
Data Source
AI summary
The present invention relates to a folded side-leakage-proof arc-shaped elastic sanitary product wainscot and a production line therefor. After two sides of an elastic membrane under a tensile state are compounded with nonwoven fabric strips by hot pressing respectively, the elastic membrane rebounds and resets to impel the nonwoven fabric strips located on two sides of the elastic membrane to form a folded side-leakage-proof side wall. The elastic membrane is in the shape of a concave arc. The present invention has the following advantages: 1, the nonwoven fabric strips may be compounded with two sides of the elastic air-permeable membrane without a hot melt adhesive so as to ensure that the air permeability of the elastic air-permeable membrane and the nonwoven fabric strips is not affected by the hot melt adhesive; and 2, after two sides of the elastic air-permeable membrane under a tensile state are compounded with the nonwoven fabric strips, the elastic air-permeable membrane rebounds to impel the nonwoven fabric strips to form a required elastic folded side-leakage-proof side wall with the rebound and reset of the elastic air-permeable membrane. This side wall not only has a function of preventing liquid from flowing, but also greatly reduces a contact area between a sanitary napkin or a panty-shape diaper and a human body, such that the comfort level of the human body is greatly improved.