Graphene-Infused TPU Trim Panel Airbag Deployment
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Solution Overview
Problem
Conventional thermoplastic polyurethane (TPU) materials used in automotive interior trim panels tend to self-heal at airbag tear seams, become brittle with high heat exposure, and when graphene is added in high concentrations, they lose flexibility, making them difficult to mold and unsuitable for airbag deployments.
Innovation Solution
A graphene-infused thermoplastic polyurethane composition with a controlled concentration of graphene nanoparticles is used, combined with a grinding process for improved flowability and viscosity during molding, maintaining panel flexibility while providing electromagnetic interference shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high concentration of graphene (30-40% by weight) is added to TPU, then electromagnetic interference shielding properties are improved, but the TPU becomes hard and rigid, losing flexibility
Solution Approach 1:
The patent changes the concentration parameter of graphene from high (30-40%) to optimized low levels (0.1-5%), which maintains EMI shielding effectiveness while preserving the flexibility and softness required for automotive interior trim panels and airbag deployments
Solution Approach 2:
The patent creates a composite material system combining TPU with controlled amounts of graphene, where the synergistic interaction between the polymer matrix and graphene filler achieves both EMI shielding and mechanical flexibility without the rigidity problems of high-concentration graphene composites
2Ease of manufacture
If conventional TPU is used for airbag cover doors, then manufacturing is simplified, but the material self-heals at tear seams, preventing proper airbag deployment
Solution Approach 1:
The patent extracts or removes the self-healing property from the TPU material by incorporating graphene, which disrupts the polymer chain mobility and prevents the spontaneous rejoining of torn surfaces, thereby ensuring reliable airbag deployment while maintaining manufacturing simplicity
3Duration of action of stationary object
If TPU is exposed to high heat during its lifetime, then durability is tested, but the material becomes brittle and loses its original physical properties
Solution Approach 1:
The patent employs a composite material system where graphene reinforcement within the TPU matrix enhances thermal stability and prevents brittleness during high-temperature exposure, maintaining impact absorption and physical properties throughout the service lifetime
Solution Approach 2:
The patent modifies the thermal and mechanical parameters of TPU through graphene incorporation, raising the glass transition temperature and maintaining elongation and tensile strength even after prolonged exposure to high temperatures during the component's lifetime
4Quantity of substance
If conventional plastics are used, then material availability is good, but flow-ability and viscosity during molding are insufficient compared to the graphene-infused TPU
Solution Approach 1:
The patent optimizes the viscosity and flow characteristics of the TPU compound by controlling graphene concentration and particle size, achieving superior flow-ability during slush and rotational molding processes while maintaining adequate material availability
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 solution achieves enhanced heat performance, maintains flexibility, and ensures effective airbag deployment without self-healing, while providing superior electromagnetic interference shielding and improved material flowability.
Implementation Method 1
achieves desired electromagnetic interference shielding of electronic components, such as electronic controllers, sensors and the like
Implementation Method 2
The present method employs a grinding process which results in a final product having superior flow-ability and viscosity during slush or rotational molding
Implementation Method 3
the present graphene infused thermoplastic polyurethane produces enhanced heat performance along with improved electromagnetic interference shielding properties
Data Source
AI summary
A urethane and graphene interior trim panel is provided. In another aspect, the interior trim panel may be an automotive vehicle instrument panel, airbag cover, door trim panel, center console, knee bolster, seat mechanism cover, pillar cover or the like. A further aspect includes a graphene infused thermoplastic polyurethane compound and more particularly a TPU-graphene composition or mixture which can be ground, molded and then used in vehicle interior applications.