Composite Plastic Adhesion Using Polyethyleneimine
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Solution Overview
Problem
Current plastic composite components require complex processes and additional adhesion promoter layers to achieve satisfactory adhesion between first and second plastic components, which increases production costs and cycle times.
Innovation Solution
A plastic composite component comprising a first plastic component with a polyamide matrix polymer and fiber reinforcement, and a second plastic component with a polyamide molding polymer, where polyethyleneimine (PEI) is used in the surface composition or second plastic component to enhance adhesion between the two components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an adhesion promoter layer is used to improve adhesion between plastic components, then adhesion strength is improved, but device complexity and production cost increase
Solution Approach 1:
The patent uses polyethyleneimine (PEI) as an intermediary substance that chemically modifies the surface of the first plastic component to improve adhesion. The PEI forms amino groups on the plastic surface that create strong chemical bonds with the second plastic component, eliminating the need for separate adhesion promoter layers while achieving superior bonding strength.
Solution Approach 2:
The patent changes the surface chemistry parameters of the plastic component by treating it with polyethyleneimine. This chemical treatment modifies the surface energy, polarity, and functional groups of the plastic surface, enabling direct strong adhesion to the second plastic component without additional promoter layers.
2Strength
If preheating is used to achieve good bond strength between plastic components, then adhesion is improved, but production cycle time increases
Solution Approach 1:
The patent applies polyethyleneimine treatment to the first plastic component in advance, before the bonding process. This preliminary chemical modification creates a permanently active surface that maintains high adhesion capability without requiring continuous thermal preheating, thereby reducing production cycle time while preserving bond strength.
3Strength
If deep partial melting of the surface is used to achieve stable weld bond, then adhesion is improved, but energy consumption and production time increase
Solution Approach 1:
The patent replaces the thermal-mechanical bonding mechanism (deep partial melting through heating) with a chemical bonding mechanism. The polyethyleneimine-treated surface creates strong chemical bonds with the second plastic component through amino group interactions, eliminating the need for high-energy thermal processing while achieving stable weld bonds.
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 use of polyethyleneimine (PEI) simplifies the production process, reduces costs, and achieves excellent mechanical properties and adhesion between the first and second plastic components, allowing for efficient and cost-effective manufacturing.
Implementation Method 1
SC and/or C2 comprise a polyethyleneimine (PEI) for improving the adhesion between C1 and C2
Data Source
AI summary
The present invention relates to a plastic composite component (CC) which has a first plastic component (C1) and a second plastic component (C2) and comprises a polyethyleneimine (PEI) for improving the adhesion between C1 and C2. The present invention further relates to a process for producing this plastic composite component (CC), to a process for improving the adhesion between a first plastic component (C1) and a second plastic component (C2) in a plastic composite component (CC) and to the use of polyethyleneimine for improving the adhesion between a first plastic component (C1) and a second plastic component (C2) in a plastic composite component (CC).