Low-Melting Polyester Fiber Layers for Recyclable Auto Trim
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Solution Overview
Problem
Existing automobile interior/exterior materials face challenges in processability and manufacturing costs, particularly when incorporating a soft polyurethane foam layer, which increases thickness and VOC emissions, and hinders recyclability.
Innovation Solution
The use of a low-melting-point polyester resin fiber layer, combining first polyester resin fibers with a melting point of 180 °C to 250 °C and second polyester resin fibers with a melting point higher than 250 °C, to enhance processability and reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional thermoplastic polymers are used for automotive interior and exterior parts, then durability and mechanical strength are improved, but heat resistance deteriorates and melting occurs at elevated temperatures
Solution Approach 1:
The patent combines polyester resin with inorganic fillers (such as alumina, silica, or calcium carbonate) to create a composite material that maintains mechanical strength while achieving superior heat resistance. The inorganic fillers form a refractory skeleton that prevents melting at elevated temperatures while the polyester matrix provides structural integrity.
Solution Approach 2:
The patent modifies the chemical composition and molecular structure of the polymer matrix by using crosslinking agents and specific polyester resin formulations with controlled molecular weights and functional groups. This changes the thermal parameters of the material, raising the decomposition temperature and maintaining mechanical properties at high temperatures.
2Temperature
If high-performance heat-resistant materials are developed, then temperature resistance is improved, but cost increases
Solution Approach 1:
The patent utilizes porous inorganic fillers and creates a porous structure in the composite material that reduces the amount of expensive polymer matrix required while maintaining heat resistance through the refractory inorganic framework. This lowers material costs while preserving thermal performance.
Solution Approach 2:
The patent employs cost-effective polyester resin formulations and readily available inorganic fillers such as calcium carbonate and silica, replacing expensive high-performance polymers. The material is designed for single-use automotive applications where recyclability is less critical, optimizing cost-performance ratio.
3Ease of manufacture
If traditional molding processes are used for producing automotive parts, then manufacturing simplicity is maintained, but production time increases
Solution Approach 1:
The patent incorporates all necessary reinforcements, fillers, and functional additives into the polymer matrix during compound preparation before molding. This preliminary mixing and pre-positioning of all components eliminates the need for secondary operations such as post-molding reinforcement attachment or multi-step assembly processes.
Solution Approach 2:
The patent combines multiple functions (structural support, heat resistance, dimensional stability, and surface finish) into a single integrated molding process by using multi-functional composite materials that perform all required functions simultaneously during one injection or compression molding cycle.
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
This approach enables excellent processability without compromising strength and durability, while lowering manufacturing costs and potentially improving recyclability by reducing VOC emissions.
Implementation Method 1
a polyester resin matrix bound to inorganic fillers and reinforcements
Implementation Method 2
low melting polyester resin
Data Source
AI summary
Provided are an automobile interior/exterior material including a low-melting-point polyester resin fiber layer, and a method of manufacturing the same. More particularly, an automobile interior/exterior material having excellent processability and price competitiveness without deterioration of properties, such as strength and durability, is provided.