Raised Pattern Cleaning Pad Using Interlayer Threads
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Solution Overview
Problem
Commercial cleaning and skin care articles, such as makeup remover pads, lack a pronounced relief in the wet state due to the difficulty in creating large amplitude hollows or reliefs without risking perforation or tearing, and the relief often loses amplitude when humidified.
Innovation Solution
A cleaning and skin care article with at least two outer layers of absorbent fibrous material bonded together and a series of threads between them, forming a raised pattern, where the thickness of the outer layers is less than the diameter of the threads, creating a stable relief pattern that maintains its amplitude even when wet, using techniques like hydrobonding or thermofusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If compression methods (embossing or calendering) are used to form relief, then relief amplitude is improved, but the risk of perforation or tearing increases and pad strength decreases
Solution Approach 1:
The relief structure is pre-formed by inserting rigid elements (stents, wires, or tubes) between the fiber layers before bonding. This preliminary action creates the desired relief amplitude without requiring post-compression that would weaken the pad. The rigid elements are positioned in advance to define the relief geometry, eliminating the need for damaging compression operations.
Solution Approach 2:
Rigid elements (stents, wires, or tubes) are introduced as intermediary structures between the fiber layers to create and maintain the relief. These intermediaries act as molds or frameworks that shape the fiber layers into the desired relief pattern without requiring compression that would compromise pad strength. The intermediaries are temporarily present during manufacturing and are removed or integrated afterward.
2Strength
If hydrobinding process is used to bind fiber layers, then pad cohesion is improved, but relief amplitude is reduced and relief loses amplitude when humidified
Solution Approach 1:
The relief structure is established by inserting rigid elements before the hydrobinding process. This preliminary structuring ensures that the relief amplitude is determined by the rigid elements rather than by compression during bonding. The rigid elements maintain their shape even when the pad is humidified, preventing the relief from losing amplitude.
Solution Approach 2:
The pad combines soft hydrophilic fiber layers with rigid structural elements (stents, wires, or tubes) to create a composite structure. This composite approach allows the fiber layers to provide cohesion and absorbency while the rigid elements maintain the relief amplitude. The combination resolves the contradiction between cohesion and relief stability.
3Strength
If thick outer layers are used to ensure pad strength, then tensile strength is improved, but the ability to create pronounced relief is reduced
Solution Approach 1:
Rigid elements are inserted between the outer layers before bonding to create the relief structure. This allows the outer layers to be made thin enough to allow relief formation while maintaining sufficient strength through the rigid element support. The preliminary insertion of structural elements enables relief creation without requiring thick fiber layers.
Solution Approach 2:
Rigid elements act as intermediaries that provide structural support to thin outer layers, enabling the creation of pronounced relief without requiring the outer layers to be thick. The rigid elements compensate for the reduced thickness of the fiber layers, maintaining tensile strength while allowing relief to be pronounced.
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 article achieves a pronounced relief without weakening the pad, maintaining structural integrity and enhancing makeup removal effectiveness, with increased tensile strength and friction index, especially in the wet state.
Implementation Method 1
the connection of the external layers is carried out by means of a technique chosen from hydrobonding, bonding and thermofusion
Implementation Method 2
the connection of the external layers is carried out by means of a technique chosen from hydrobonding, bonding and thermofusion
Implementation Method 3
the thickness of at least one of the outer layers being less than average diameter of the threads so as to create a raised pattern on the surface of the article
Data Source
Figure 1~2D
Figure 3A~3B
Figure 3C~3D
AI summary
The invention relates to a skin cleansing and/or care product, such as a makeup remover pad made of hydrophilic cotton fibers, intended for applying and/or removing liquid or semi-solid substances from the skin. The product comprises at least two outer layers (10a, 10b) of absorbent fibrous material bonded together and at least one series of threads (10d) arranged between said outer layers (10a, 10b). The thickness of at least one of the outer layers (10b) is less than the average diameter of the threads, so as to create a raised pattern on the surface of the product. Thus configured, the invention is capable of providing a skin cleansing and/or care product with a raised pattern on its surface, which is formed not by compression of the fiber layers, but by the presence of a series of large-diameter threads beneath the outer layers of the product.