Thermoplastic Polyurethane Membrane Surface Modification for Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional thermoplastic polyurethane (TPU) membranes exhibit temporary adhesion at high temperatures and inadequate adhesion and low elasticity at room temperature, leading to easy peeling from textiles.
Innovation Solution
A method involving the application of a modifying solution comprising diethylenetriamine, diethylaminopropylamine, and diaminodiphenylmethane on the TPU membrane surfaces, followed by a controlled temperature reaction to enhance adhesion and elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional TPU membrane is used for adhesive attachment, then the membrane can be applied to textile fabrics, but the adhesion is temporary and inadequate, causing easy peeling
Solution Approach 1:
The patent applies surface modification to the TPU membrane by treating it with a modifying solution containing diethylenetriamine, diethylaminopropylamine, and diaminodiphenylmethane. This chemical treatment changes the surface parameters of the membrane, introducing functional groups that enhance adhesion to textile fibers while maintaining the bulk properties of the TPU membrane.
Solution Approach 2:
The patent creates a composite structure by combining the TPU membrane with a modifying solution layer that contains multiple amine compounds. This composite approach integrates the adhesive properties of the modifying solution with the elastic properties of the TPU membrane, achieving both high adhesion and high elasticity simultaneously.
2Strength
If the TPU membrane relies solely on polymer chain adhesion, then the bonding mechanism is simple, but the elasticity is insufficient for room temperature adhesion
Solution Approach 1:
The patent modifies the surface chemistry of the TPU membrane by introducing amine functional groups through treatment with diethylenetriamine, diethylaminopropylamine, and diaminodiphenylmethane. This changes the adhesive parameters from simple polymer chain interaction to include chemical bonding capabilities, enabling room temperature adhesion while preserving the membrane's elasticity.
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 modified TPU membranes demonstrate significantly improved adhesion and elasticity, with enhanced peeling strength and elastic recovery, effectively adhering to textiles without easy detachment.
Implementation Method 1
subjecting the semi-finished product to a temperature of 50° C. ̃180° C., in order for the semi-finished product to undergo a reaction for a reaction time of 10 ̃120 seconds and consequently form the TPU membrane with high adhesion and high elasticity
Data Source
AI summary
A method of preparing a thermoplastic polyurethane membrane with high adhesion and high elasticity includes the following steps: (a) preparing a modifying solution, wherein the modifying solution is one or a mixture of at least two of diethylenetriamine, diethylaminopropylamine, and diaminodiphenylmethane; (b) preparing a semi-finished product by applying the modifying solution on at least one surface of a thermoplastic polyurethane membrane; and (c) subjecting the semi-finished product to a temperature of 50° C.˜180° C. in order for the semi-finished product to undergo a reaction and thus form the thermoplastic polyurethane membrane with high adhesion and high elasticity.