Insulating Strip with Rubber-Plastic Composite for Adhesion and Dampening
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Solution Overview
Problem
Existing insulating sheets with a one-sided bitumen rubber layer on a polyethylene carrier film are not suitable for sealing between a rising wall and a tiled surface due to limited adhesion capabilities, and they fail to provide both effective water or vapor barriers and impact noise dampening simultaneously.
Innovation Solution
A plastic sheet bonded with rubber particles, specifically using ethylene vinyl acetate or polypropylene, where the rubber particles are integrated within the plastic matrix to create a durable and adhesive surface, allowing for easy adhesion of mortars and adhesives without additional measures, and incorporating recycled materials to enhance sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a one-sided bitumen rubber layer on a polyethylene carrier film is used, then the insulating sheet can serve as a sealant and adhesive, but it cannot provide effective adhesion to walls or tiles without additional laminated fleece layers
Solution Approach 1:
The patent uses a composite material consisting of thermoplastic granules (30-70 wt%) and rubber granules (30-70 wt%), where the thermoplastic provides adhesion and structural integrity while the rubber provides elasticity and sealing properties. This composite structure eliminates the need for separate carrier films and additional laminated fleece layers, achieving strong adhesion to walls and tiles directly.
2Reliability
If a carrier film structure is used, then the insulating sheet can provide thermal insulation, but it fails to form an effective water or vapor barrier
Solution Approach 1:
The patent changes the material parameters by using a homogeneous composite of thermoplastic and rubber granules with specific particle size distributions (0.5-5 mm for thermoplastic, 0.5-2 mm for rubber). This parameter optimization creates a dense, non-porous structure that effectively blocks water and vapor penetration while maintaining thermal insulation properties and manufacturing simplicity through direct compression molding.
3Object-affected harmful factors
If rubber particles are integrated in the plastic matrix, then the insulating sheet provides effective impact noise dampening, but it reduces the adhesion capability for mortars and adhesives
Solution Approach 1:
The patent applies local quality by creating a heterogeneous composite where rubber granules (providing noise dampening) are distributed within a thermoplastic matrix (providing adhesion). The thermoplastic component, comprising 30-70 wt% of the composite, ensures adequate adhesion to mortars and adhesives while the dispersed rubber granules (30-70 wt%) provide impact noise dampening throughout the material structure.
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 provides a robust vapor or water barrier with improved adhesion properties, effective impact noise dampening, and resource efficiency by utilizing recycled materials, while maintaining a uniform and dust-free surface suitable for various applications.
Implementation Method 1
If such films in particular are melted at temperatures of around 150°C, the EVA crosslinks three-dimensionally and, after cooling, there is a permanent bond of plastic and rubber particles.
Data Source
AI summary
The invention relates to an insulating strip formed by a plastic material baked with rubber particles.