Thread Sealants with Engineered Fibers for Leakage Control
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Solution Overview
Problem
Conventional thread sealants suffer from inconsistencies in application, leakage issues due to fiber separation, susceptibility to vibrations and temperature changes, and difficulty in disassembly, leading to significant economic and environmental losses.
Innovation Solution
The use of engineered fibers such as melamines and polyaramids in a mineral oil matrix provides a consistent, high-strength sealant that can be easily applied, resistant to high pressures and temperatures, and allows for easy disassembly without damage, while eliminating the need for thickeners and improving gap-filling capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural fibers are used in conventional thread sealants, then the sealant can provide leak-proof resistance, but the inconsistency in fiber density and length leads to batch-to-batch variation and minute leak paths
Solution Approach 1:
The patent changes the critical parameters of the fibers by using engineered synthetic fibers with controlled density (1.3-2.5 g/cm³) and length (0.5-5 mm) instead of natural fibers. This parameter control ensures uniform distribution and consistent performance across batches while maintaining leak-proof resistance.
Solution Approach 2:
The patent creates a composite material system combining synthetic fibers with specific mineral fillers (calcium carbonate, barium sulfate) and lubricants. This composite approach allows optimization of both consistency and sealing performance by selecting materials with complementary properties.
2Strength
If high levels of fibers (6%-25%) are used to improve pressure and temperature resistance, then the sealant can withstand high pressure, but the sealant becomes thick and difficult to apply uniformly
Solution Approach 1:
The patent optimizes the fiber content parameter to a specific range (1%-10%) rather than using high levels (6%-25%). This parameter reduction, combined with selecting fibers of specific length (0.5-5 mm) and density (1.3-2.5 g/cm³), maintains pressure resistance while improving applyability and uniformity.
Solution Approach 2:
The patent applies fibers with specific local properties (controlled length, density, and aspect ratio) to different functional requirements. The fiber dimensions are optimized to provide reinforcement where needed while maintaining overall sealant smoothness for easy application.
3Stability of the object's composition
If synthetic fibers like PTFE are used to improve uniformity, then the sealant becomes more consistent, but the sealant becomes too pasty and hard to apply
Solution Approach 1:
The patent selects synthetic fibers with specific density (1.3-2.5 g/cm³) and length (0.5-5 mm) parameters that balance uniformity and applyability. This parameter optimization prevents the paste-like consistency caused by PTFE while maintaining synthetic fiber uniformity benefits.
Solution Approach 2:
The patent combines synthetic fibers with mineral fillers and lubricants in a composite formulation. This composite approach mitigates the pasty effect of pure synthetic fibers by incorporating materials that adjust rheology and improve flow characteristics for easier application.
4Ease of operation
If clay and mineral fillers are used in conventional sealants, then the sealant can be applied smoothly, but the components separate under pressure from tightening or internal pipe pressure
Solution Approach 1:
The patent creates a stabilized composite material where synthetic fibers are combined with mineral fillers (calcium carbonate, barium sulfate) and lubricants in specific proportions. This composite structure prevents component separation under pressure while maintaining application smoothness through the lubricating components.
Solution Approach 2:
The patent uses lubricants as intermediary materials between the mineral fillers and the base compound. These lubricants prevent direct contact and separation of mineral particles under pressure, maintaining composition stability while allowing smooth application.
Data Source
AI summary
A sealant is provided that possesses many or all of the characteristics of conventional thread sealants, and allows application with improved smoothness and uniformity of application. Sealants in accordance with the invention utilize engineered fibers such as melamines like Basofill and polyaramids such as Kevlar in its composition. Engineered fibers offer consistency and uniformity that other previously used sealants lack. Engineered fibers can improve the gap filling characteristics of the sealant, as well as the resistance of the sealant to chemicals and high pressures. Engineered fibers tend to have very high strength and low density.