Polyamide 6,10 Cooling Components Hydrolysis Resistance
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Solution Overview
Problem
Automobile cooling system components made from glass-reinforced polyamide compositions face issues with hydrolysis resistance and high-temperature creep, particularly when exposed to higher engine cooling fluid temperatures, requiring enhanced resistance and toughness.
Innovation Solution
A polyamide 6,10 composition incorporating glass fiber, copper, and a nucleating agent, with specific weight percentages and a relative viscosity of 2.3 to 2.9, is used to create components with improved resistance to calcium chloride, hydrolysis, and high-temperature creep, while maintaining productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glass-reinforced polyamide compositions are used to produce automobile cooling system components, then productivity and ease of manufacture are improved, but resistance to hydrolysis and high-temperature creep deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by using polyamide 6,10 instead of conventional polyamide 6,6 or polyamide 6,12, and optimizes the relative viscosity to 2.3-2.9. This parameter change provides inherently better resistance to hydrolysis and high-temperature creep while maintaining productivity
Solution Approach 2:
The patent creates a composite material system by combining polyamide 6,10 with specific additives including copper (0.002-0.1 wt%), nucleating agents (0.01-1.5 wt%), and glass fiber (20-50 wt%). This composite approach enhances hydrolysis resistance and creep resistance while maintaining the productivity benefits of glass-reinforced compositions
2Ease of manufacture
If glass-reinforced polyamide compositions are used to produce automobile cooling system components, then ease of manufacture is improved, but resistance to high-temperature creep deteriorates
Solution Approach 1:
The patent optimizes the relative viscosity parameter of polyamide 6,10 to 2.3-2.9, which provides better high-temperature creep resistance while maintaining ease of manufacture through standard processing conditions
Solution Approach 2:
The patent develops a composite formulation combining polyamide 6,10 with copper compounds (0.002-0.1 wt%), nucleating agents (0.01-1.5 wt%), and glass fiber (20-50 wt%). This composite material achieves superior creep resistance at high temperatures while remaining easy to manufacture using conventional processes
3Reliability
If polyamide 6,10 composition is designed for high resistance to hydrolysis and creep, then reliability is improved, but manufacturing precision may deteriorate
Solution Approach 1:
The patent incorporates nucleating agents (0.01-1.5 wt%) in the composition formulation before manufacturing. These agents promote uniform and rapid crystallization during molding, ensuring high manufacturing precision and dimensional stability while maintaining the reliability benefits of polyamide 6,10
Solution Approach 2:
The patent optimizes the relative viscosity of polyamide 6,10 to 2.3-2.9, which balances hydrolysis resistance with manufacturability. This parameter optimization ensures both high reliability and good manufacturing precision by controlling crystallization behavior and dimensional stability
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 polyamide 6,10 composition enhances the service life and performance of automobile cooling system components by providing superior resistance to hydrolysis, calcium chloride, and high-temperature creep, addressing the limitations of previous materials.
Implementation Method 1
the half-crystallization time of the polyamide composition is 5 minutes or less
Implementation Method 2
containing polyamide 6,10, glass fiber, copper and at least one type of nucleating agent
Implementation Method 3
resistance to hydrolysis, toughness and resistance to high-temperature creep
Data Source
AI summary
A tank body 125 comprising header tanks 120 of a radiator is composed with a polyamide composition containing polyamide 6,10, glass fiber, copper and nucleating agent. At this time, the polyamide composition contains, based on the total weight of the polyamide 6,10, the glass fiber, the copper and the nucleating agent, (a) 48.9 to 79.988 percent by weight of the polyamide 6,10, (b) 20 to 50 percent by weight of the glass fiber, (c) 0.002 to 0.1 percent by weight of the copper, and (d) 0.01 to 1.5 percent by weight of the nucleating agent, and the result of measuring half-crystallization time of the polyamide composition is 5 minutes or less. In addition, the polyamide 6,10 used has a relative viscosity, as measured in 98 percent sulfuric acid, of 2.3 to 2.9.