Slit and Embossed Polymer Films for Compression-Resistant Industrial Textiles
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Solution Overview
Problem
Existing industrial textiles for filtration and similar applications, made from woven synthetic yarns, are costly and time-consuming to produce, and their nonwoven alternatives lack sufficient resistance to compressive loading and adjustable permeability.
Innovation Solution
A nonwoven industrial fabric constructed from selectively slit and profiled polymer film layers, where protrusions are designed with curved end walls and reinforcing material under angled planar end walls, allowing for enhanced compressive resistance and adjustable permeability without changing the molding pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If woven synthetic yarns are used to manufacture industrial textiles, then the fabrics provide high stability and resistance to abrasive wear, but the production cost is high and the manufacturing process is time-consuming
Solution Approach 1:
The patent replaces expensive woven fabrics with disposable nonwoven films made from thermoplastic polymers. These films are designed to perform the required filtration and conveyance functions without needing to be durable enough for repeated weaving and re-weaving operations, thereby reducing manufacturing costs while maintaining operational reliability
Solution Approach 2:
The patent substitutes the mechanical weaving process with a thermal bonding process. Instead of interweaving yarns on industrial looms, the invention uses heat and pressure to bond thermoplastic film layers together, dramatically reducing manufacturing time and capital investment requirements
2Ease of manufacture
If nonwoven materials are used to reduce manufacturing costs, then the production becomes simpler and cheaper, but the fabrics lack sufficient resistance to compressive loading
Solution Approach 1:
The patent incorporates curved or arched protrusions into the film structure. These curved geometric features provide structural rigidity and resistance to compressive loading, allowing the nonwoven material to maintain its shape and function under compression without requiring complex woven constructions
Solution Approach 2:
The patent uses composite structures combining thermoplastic polymer films with specific geometric protrusions. The combination of the flexible polymer matrix with the structurally reinforcing curved protrusions creates a composite material that achieves both ease of manufacture and adequate compressive strength
3Adaptability or versatility
If film layers are slit to create apertures, then the permeability is increased, but the compression resistance is reduced due to removal of supporting material
Solution Approach 1:
The patent applies different qualities to different parts of the film structure. The protrusions maintain their full material integrity and curved geometry to provide compression resistance, while the land areas between protrusions are slit to create apertures for permeability. This local differentiation allows simultaneous achievement of both properties
Solution Approach 2:
The patent segments the film into distinct functional zones: protrusions that maintain structural integrity and compression resistance, and slitted land areas that provide permeability. This segmentation allows each zone to optimize its function without compromising the other
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 fabric maintains void volume under compressive loads and allows for easy adjustment of permeability, providing improved resistance to compression and fluid flow as needed for industrial applications.
Implementation Method 1
the film is pressed by application of heat and pressure using a chosen mold pattern so as to selectively and permanently deform portions out of plane
Implementation Method 2
which have been laser drilled to impart porosity
Implementation Method 3
when two similarly formed film layers are bonded together in alignment
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A film for conveying in an industrial process, industrial fabrics made from the film, and methods of manufacture. The film has a plurality of protrusions separated by land areas. Each protrusion comprises a top member having opposing lateral edges and is supported by opposed compression resistant first and second end walls, which with at least one of the lateral edges define an aperture extending through the film to provide a flow path. The base edge of each end wall has a configuration selected from at least one of the base edge being convexly curved away from the protrusion body; and each end wall extending below at least a part of each of the first and second lateral edges and being connected to each of the first and second lateral edges. The film structure provides physical properties equivalent to a woven fabric, with improved strength, stability and compression resistance.