Wear-Resistant Nylon Roller Composite for Airport Freight Vehicles
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Solution Overview
Problem
Airport freight vehicle rollers made of aluminum alloy experience excessive wear, skidding, and noise due to poor friction properties, especially in wet conditions, leading to safety and operational issues.
Innovation Solution
A high wear-resistant nylon composite material comprising 60-80 wt% nylon 6 or nylon 66, 5-13 wt% glass beads, 6-14 wt% glass fiber powder, 5-7 wt% lubricating anti-wear agent, 3-5 wt% graft type toughening modifying agent, 0.3-1 wt% antioxidant, and 0.2-0.5 wt% nucleating agent, with surface treatments and specific formulations to enhance friction and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aluminum alloy is used for rollers, then the rollers have good strength and wear resistance, but they experience excessive wear, skidding, and noise due to poor friction properties
Solution Approach 1:
The patent uses a composite material consisting of polyamide 66 resin as the base polymer, combined with glass fibers for reinforcement, graphite for self-lubrication, and other additives. This composite structure provides both the strength needed for roller durability and the friction properties needed to prevent skidding and wear.
Solution Approach 2:
The patent modifies the friction parameters of the roller material by incorporating graphite particles that provide self-lubrication properties, and adjusting the composition ratios of various components to optimize the balance between wear resistance and friction characteristics for different operating conditions.
2Strength
If aluminum alloy rollers are used, then they provide structural strength, but they generate too much noise when friction occurs
Solution Approach 1:
The composite material combines polyamide 66 with glass fibers and graphite, where the polyamide matrix provides shock absorption and noise reduction, while glass fibers maintain structural strength, and graphite reduces friction-induced noise through self-lubrication.
3Strength
If glass fibers are added to enhance nylon performance, then the mechanical properties improve, but the water absorbing capability increases
Solution Approach 1:
The patent carefully controls the glass fiber content within specific ranges (5-20 wt%) and uses surface treatment on the glass fibers to reduce their hygroscopicity, thereby maintaining improved mechanical properties while limiting the increase in water absorption.
Solution Approach 2:
The patent uses coupling agents as intermediaries between the glass fibers and the polyamide matrix, which improve the interfacial bonding and reduce the tendency of glass fibers to absorb moisture, thereby maintaining mechanical strength while reducing water absorption.
4Reliability
If the surface of aluminum alloy forms oxide film, then it provides some protection, but the oxide film ruptures and falls off under friction forces causing wear debris
Solution Approach 1:
The patent incorporates graphite particles in the composite material that provide self-lubrication properties, allowing the roller surface to self-protect by reducing friction and preventing the formation and rupture of weak oxide-like surface layers that occur with aluminum alloy.
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 composite material provides high toughness, stiffness, and exceptional impact resistance, reducing wear and skidding, while the frosted texture enhances skid resistance, ensuring safe and controlled freight transport with reduced noise and environmental impact.
Implementation Method 1
A high wear-resistant nylon composite for rollers of airport freight vehicle and preparation method thereof... 5-13 wt% glass beads, 6-14 wt% glass fiber powder
Implementation Method 2
5-7 wt% lubricating anti-wear agent... small friction coefficient, good self-lubricating and silencing properties
Implementation Method 3
amide groups of the polyamide are polarized and can form a hydrogen bond, and hence polyamide has excellent mechanical properties, and is a type of engineering plastics with good shock resistance and relatively strong toughness
Implementation Method 4
6-14 wt% glass fiber powder whose surface has been treated by a silane coupling agent
Data Source
Figure 1
AI summary
A high wear-resistant nylon composite material for rollers of an airport freight vehicle and a preparation method thereof are disclosed. The composite material includes the following materials as the main components, 60-80 wt% of nylon 6 or nylon 66 or a mixture of nylon 6 and nylon 66, 5-13 wt% of glass beads, 6-14 wt% of glass fiber powder, 5-7 wt% of lubricating anti-wear agent. The composite material further includes the following materials as the auxiliary materials, 3-5 wt% of graft type toughening modifying agent, 0.3-1 wt% of antioxidant, 0.2-0.3 wt% of lubricating dispersant and 0.2-0.5 wt% of nucleating agent. The composite has characteristics such as high wear resistance, high heat resistance, relatively high toughness and skid resistance.