Padding Section Manufacturing Unit for Absorbent Sanitary Articles
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Solution Overview
Problem
Existing methods for manufacturing absorbent sanitary article padding sections face issues with cohesion and compactness due to the dispersion of superabsorbent material granules, leading to uneven compression and potential mechanical faults.
Innovation Solution
A unit and method that involves a multi-layer inner pad with two layers of absorbent material, including cellulose fibers and superabsorbent granules, and a single-layer outer pad with recesses, using adhesive layers and specific conveyor systems to ensure proper alignment and compression, reducing the thickness of the inner pad and enhancing overall compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a multi-layer inner pad with large quantity of superabsorbent granules is used to increase absorbency, then the absorbency of the padding is improved, but the cohesion between layers deteriorates due to granule dispersion preventing stable fiber interpenetration
Solution Approach 1:
The patent applies preliminary compression to the multi-layer inner pad before it is superposed on the outer pad. This pre-compression action compactsthe layers together, preventing granule dispersion and ensuring stable fiber interpenetration before the final assembly compression occurs.
Solution Approach 2:
The patent introduces adhesive as an intermediary substance between the layers of the multi-layer inner pad. The adhesive acts as a binding agent that holds the layers together, preventing granule dispersion and ensuring stable cohesion between the cellulose pulp fibers and superabsorbent granules.
2Quantity of substance
If the inner pad is made thicker than the supporting pad to increase absorbency, then the absorbency is improved, but the uniformity of compression deteriorates leading to unevenly compressed padding
Solution Approach 1:
The patent applies preliminary compression to the multi-layer inner pad before assembly with the outer pad. This pre-compression action reduces the thickness of the inner pad and ensures uniform density distribution, which enables uniform compression during the final assembly compression despite the initial thickness difference between inner and outer pads.
3Quantity of substance
If layers of absorbent material containing large quantity of granular superabsorbent material are superposed to make the inner pad thicker, then the absorbency is improved, but the compactness deteriorates due to lack of cohesion between layers
Solution Approach 1:
The patent applies preliminary compression to the multi-layer inner pad before assembly. This pre-compression action compactsthe layers together, ensuring uniform density and preventing granule dispersion, which results in a compact and cohesive structure that maintains high absorbency.
Solution Approach 2:
The patent introduces adhesive as an intermediary binding agent between the layers of the multi-layer inner pad. The adhesive ensures stable cohesion between layers, preventing granule dispersion and maintaining compactness while preserving the high absorbency provided by the large quantity of superabsorbent granules.
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 achieves greater cohesion and compactness of the padding sections, preventing granule dispersion and ensuring consistent, improved compression, thus enhancing the production process and product quality.
Implementation Method 1
a first suction drum for forming and conveying the multi-layer inner pad and a second suction drum for forming and conveying the outer supporting pad
Data Source
AI summary
In a unit for making sections of padding for absorbent sanitary articles comprising a first rotary conveyor for feeding and forming a continuous succession of outer pads, comprising at least one layer, a second rotary conveyor for feeding and forming a continuous succession of inner pads comprising two layers, a third rotary conveyor for the pads defining a position for superposing the outer pads and the inner pads, there are compressing means for the two-layer inner pads upstream of the superposing position and second compressing means for the superposed pads downstream of the superposing position.