Ester-Based Lubricant for Circular Textile Machinery
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Solution Overview
Problem
Conventional lubricants used in circular textile machinery for hosiery suffer from high temperature-induced oxidation, leading to increased viscosity, wear, and energy consumption, while existing lubricants for synthetic yarns are unsuitable for mechanical parts due to swelling and oxidation issues, necessitating specific cooling systems and complex waste disposal.
Innovation Solution
A lubricating product comprising esters and alcohol ethoxylates with added coconut amide, providing low viscosity, high stability, and biodegradability, which reduces friction and wear, maintains low operating temperatures, and is easily washable, thereby minimizing energy consumption and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional mineral oils are used for lubrication, then friction between moving parts is reduced, but oxidation occurs at high temperatures leading to increased viscosity and wear
Solution Approach 1:
The patent changes the chemical composition parameters of the lubricant from conventional mineral oils to a specific formulation containing esters (2-ethylhexyl stearate, 2-ethylhexyl palmitate, isotridecyl stearate), alcohol ethoxylates, and coconut amide. This parameter change enables the lubricant to maintain stable viscosity and resist oxidation at high temperatures while providing effective lubrication, directly resolving the contradiction between friction reduction and temperature stability.
2Stability of the object's composition
If high percentages of additives are added to mineral oils to improve stability, then oxidation resistance improves, but manufacturing cost increases
Solution Approach 1:
The patent creates a composite lubricating composition by combining specific esters (2-ethylhexyl stearate, 2-ethylhexyl palmitate, isotridecyl stearate), alcohol ethoxylates, and coconut amide in optimized proportions. This composite formulation achieves superior oxidation stability and temperature resistance without requiring high percentages of expensive additives, as the synergistic combination of components provides inherent stability. The formulation balances performance and cost-effectiveness.
3Temperature
If cooling systems are installed to reduce operating temperature, then temperature control improves, but device complexity and energy consumption increase
Solution Approach 1:
The patent replaces the mechanical cooling system with a chemically-based solution by formulating a lubricant with exceptional thermal stability. The ester-based composition (2-ethylhexyl stearate, 2-ethylhexyl palmitate, isotridecyl stearate) inherently resists oxidation and maintains viscosity at high temperatures, eliminating or reducing the need for external cooling systems. This substitution of mechanical cooling with chemical stability resolves the contradiction between temperature control and system complexity.
4Force
If mineral oils are used for lubrication, then friction is reduced, but waste disposal becomes difficult and environmentally harmful
Solution Approach 1:
The patent fundamentally changes the chemical parameters of the lubricant from petroleum-based mineral oils to bio-based esters (2-ethylhexyl stearate, 2-ethylhexyl palmitate, isotridecyl stearate) combined with alcohol ethoxylates and coconut amide. This parameter change makes the lubricant biodegradable and environmentally friendly, allowing easy disposal while maintaining effective lubrication properties. The ester-based formulation provides the same friction reduction benefits as mineral oils without the environmental harm.
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 lubricating product significantly reduces friction and wear, decreases operating temperatures by up to 10°C, and is easily biodegradable, resulting in energy savings and reduced waste, while maintaining controlled viscosity and preventing oxidation, thus enhancing machine efficiency and environmental sustainability.
Implementation Method 1
lubricants adapted to substantially reduce friction between mutually moving metal parts and to minimize wear thereon
Implementation Method 2
The oil becomes more viscous and acids and sludges develop, compromising the efficiency of the machine... a high viscosity index indicates a smaller variation in viscosity as the temperature increases
Implementation Method 3
the high operating speeds reached by these circular machines cause, when operating at full speed, a considerable increase in temperature, which is damaging for the electronic components
Data Source
Figure 1A~1B
Figure 2A~2B
AI summary
The present invention relates to the field of lubricating products for the hosiery and knitwear machinery sector. In particular, the present invention concerns a lubricating product specifically for use on circular textile machinery for hosiery, comprising: - at least one ester having the following structural formula wherein linear or branched hydrocarbon functional groups, with R from C3 to C16 and R' from C12 to C18, are bonded to the ester functional group; - at least one alcohol ethoxylate.