Disposable Absorbent Mat Sealing Structure for Side Leak Prevention
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Solution Overview
Problem
Traditional disposable absorbent mats suffer from significant liquid leakage along their sides due to inadequate sealing, particularly when produced in-line, and existing solutions only partially address this issue.
Innovation Solution
A disposable absorbent mat design featuring a liquid-impermeable material sheet turned up on one side of the absorbent pad and additional strips of impermeable material applied orthogonally to seal all four sides, combined with a simplified absorbent pad structure using hydrophilic non-woven fabric instead of additional tissue layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gluing or welding of edges is used to join layers, then manufacturing is simple, but liquid leakage occurs along the sides
Solution Approach 1:
The sealing solution is divided into two independent parts: turned-up edges for two sides and separate strips for the other two sides. This segmentation allows each component to be optimized independently and simplifies the manufacturing process by enabling modular assembly.
Solution Approach 2:
The sealing approach transitions from a two-dimensional planar seal to a three-dimensional structure by turning up the edges vertically. This adds a vertical dimension to the seal, creating a barrier that prevents liquid leakage more effectively than flat glued edges.
2Reliability
If turned-up edges are used to close two sides, then sealing improves for those sides, but the other two sides cannot be sealed due to in-line production constraints
Solution Approach 1:
The sealing solution is divided into two independent parts: turned-up edges for two sides and separate strips for the other two sides. This segmentation allows each component to be optimized independently and simplifies the manufacturing process by enabling modular assembly.
Solution Approach 2:
The strips serve multiple functions: they seal the absorbent pad on two sides, connect the impermeable and permeable sheets, and can be integrated into the in-line production process. This multi-functionality resolves the contradiction by providing a single component that addresses multiple sealing needs.
3Loss of substance
If absorbent pad is entirely contained with coupling edges, then material usage is optimized, but liquid leakage risk increases
Solution Approach 1:
The sealing approach transitions from a two-dimensional planar seal to a three-dimensional structure by turning up the edges vertically. This adds a vertical dimension to the seal, creating a barrier that prevents liquid leakage more effectively than flat glued edges.
Solution Approach 2:
The mat combines multiple materials with different properties: hydrophobic turned-up edges for external sealing, hydrophilic strips for internal sealing and liquid distribution, and absorbent pad materials. This composite structure achieves both material efficiency and reliable leakage prevention.
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 design ensures complete liquid-tight sealing along all sides, reducing production costs and material usage while maintaining effective absorption, and allows for efficient in-line manufacturing.
Implementation Method 1
a sheet of liquid-impermeable material, having a predefined length and width greater than the length and width of said absorbent pad, coupled laid under said absorbent pad
Implementation Method 2
a sheet of liquid-permeable material, coupled superimposed on said absorbent pad on the opposite side with respect to said sheet of liquid-impermeable material
Implementation Method 3
Said absorbent pad comprises cellulose, technically called FLUFF, optionally mixed with granules of superabsorbent material, technically called SAP, or polymers.
Implementation Method 4
Said absorbent pad comprises cellulose, technically called FLUFF
Data Source
AI summary
The present invention relates to the field of sanitary devices and in particular it relates to a disposable absorbent mat. usable in general to protect any surface which may come into contact with urine or other type of organic liquid. Said disposable absorbent mat (100) comprises: a liquid absorbing pad (1) having a predefined length and width delimiting an effective area (23); a sheet of liquid-impermeable material (2), coupled laid under said absorbent pad (1), so as to define a first (21) and a second (22) pair of opposite free edges. arranged outside the effective area (23) occupied by said absorbent pad (1); a sheet of liquid-permeable material (3), coupled superimposed on said absorbent pad (1) on the opposite side with respect to said sheet of liquid-impermeable material (2); first lateral closing means of said absorbent pad (1) against the leakage of liquids. Said absorbent mat (100) comprises a first (4) and a second (5) strip of liquid-impermeable material to define second lateral closing means of said absorbent pad (1) against the leakage of liquids, arranged orthogonally with respect to said first lateral closing means. The invention also relates to a process for manufacturing said disposable absorbent mat.