Reinforced Element for Industrial Textiles Using Composite Filaments
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Solution Overview
Problem
Industrial textiles used in papermaking and filtration applications often have non-uniform physical properties, leading to premature failure under load due to inadequate tensile strength and flexibility, which is not sufficient for robust performance.
Innovation Solution
A reinforced element comprising a fibrous material encapsulated in a thermoplastic polymer matrix, with continuous filaments oriented in specific directions and a temperature difference between the polymer matrix and filaments to enhance tensile strength, along with optional NIR laser energy absorption for improved welding capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polymeric film layers are used to make industrial textiles, then the textiles can be manufactured with uniform thickness and structure, but the tensile strength is insufficient (maximum 350-525 N/cm) and the textiles fail prematurely under load
Solution Approach 1:
The patent applies composite materials by combining polymeric film layers with fibrous reinforcing materials (such as glass fibers, aramid, or high-tenacity polyethylene) to create a hybrid structure. The fibrous material provides the necessary tensile strength and load-bearing capacity, while the polymeric film provides uniformity and structural integrity. This composite approach resolves the contradiction by achieving both high strength and reliability simultaneously.
Solution Approach 2:
The patent applies local quality by strategically placing fibrous reinforcing materials at specific locations within the industrial textile structure, particularly in high-stress areas. The reinforcement is not uniformly distributed but concentrated where needed to maximize tensile strength while maintaining overall uniformity of the polymeric matrix. This allows the textile to withstand higher loads without premature failure.
2Strength
If the polymeric film thickness is increased to improve tensile strength, then the strength increases, but the flexibility and ability to conform to machine surfaces deteriorates
Solution Approach 1:
The composite structure allows thin polymeric film layers to be used while achieving high tensile strength through the fibrous reinforcement. The thin film maintains flexibility and conformability to machine surfaces, while the embedded fibrous material provides the necessary strength. This resolves the contradiction by decoupling the functions of flexibility (provided by the thin film) and strength (provided by the fibers).
Solution Approach 2:
The fibrous reinforcement is strategically positioned to provide strength only where needed, allowing the majority of the textile structure to consist of thin, flexible polymeric film. This localized reinforcement approach maintains overall flexibility while achieving high tensile strength in critical load-bearing directions.
3Strength
If multiple polymeric film layers are used to increase tensile strength, then the strength improves, but the manufacturing complexity and risk of layer separation increases
Solution Approach 1:
The patent uses a composite material approach where fibrous reinforcement is embedded within or between polymeric film layers during a single manufacturing process. This integrated construction method avoids the need for separate assembly steps and reduces the risk of layer separation, while still achieving the desired tensile strength through the composite structure.
Solution Approach 2:
The patent merges the reinforcement function and the structural film function into a single integrated component. The fibrous material and polymeric film are combined in one manufacturing step, eliminating the need for separate assembly operations and reducing manufacturing complexity while maintaining strength.
4Adaptability or versatility
If dissimilar polymeric materials are used in multiple layers to optimize properties, then the functional performance improves, but the manufacturing complexity increases due to the need for tie layers
Solution Approach 1:
The patent uses composite materials with fibrous reinforcement that can bond to different polymeric materials, simplifying the interface between dissimilar layers. The fibrous material acts as a common bonding medium that adheres to various polymeric films, eliminating the need for complex tie layer designs while maintaining functional performance.
Solution Approach 2:
The fibrous reinforcement material serves multiple functions: it provides tensile strength, acts as a bonding interface between dissimilar polymeric layers, and maintains structural integrity. This multi-functionality reduces the need for additional tie layers and simplifies the overall manufacturing process while maintaining adaptability to different polymeric materials.
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 enhanced tensile strength and uniformity in industrial textiles, enabling them to withstand higher loads and maintain robustness, thus extending their service life and performance in demanding applications.
Implementation Method 1
applying heat and pressure to a planar woven precursor material
Implementation Method 2
applying heat and pressure to a planar woven precursor material
Implementation Method 3
the element may include an NIR laser energy absorbent material that absorbs energy in the near-infrared (or "NIR", e.g., from 800 nm to 1200 nm) and mid-infrared (or "MIR", e.g., from 1500 nm to 2000 nm) range
Data Source
AI summary
A reinforced element for use in the construction and assembly of an industrial textile, the element comprising a fibrous reinforcing material encapsulated by a thermoplastic polymer matrix, wherein: the thermoplastic polymer matrix comprises an amorphous polyester, a low-crystallinity polyester, polyphenylene sulphide (PPS), or a mixture thereof; the fibrous reinforcing material comprises continuous filaments selected from the group consisting of thermoplastic polymeric filaments, thermosetting polymeric filaments, glass fibers and a mixture thereof such that a majority of the continuous filaments are oriented in a first direction and the remainder of the continuous filaments are oriented in a second direction that is generally perpendicular to the first direction; a temperature at which the amorphous polymer substantially enters a liquid state, or the melting point of the low-crystallinity polyester, is at least 10° C. less than the melting point of the thermoplastic polymeric filaments; and the polymer matrix and the fibrous reinforcing material are both substantially transparent to radiant laser energy in a range of from about 800 nm to about 1200 run.