Flexible Thermoplastic Backing Layers for Flame-Free Membrane Bonding

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Solution Overview

Problem

Existing insulating panels face challenges in achieving good adhesion and versatile fastening to both plastic and bitumen waterproofing membranes, while maintaining flexibility, windability, mechanical resistance, and suitability for a wide temperature range, especially when using bitumen-free coatings for environmental sustainability.

Innovation Solution

A support layer for insulating panels comprising a reinforcing layer made of fibrous material, coated with a thermoplastic compound, allowing adhesion to both plastic and bitumen membranes through hot air heating and gluing, without the need for open flames, and enabling flexibility and mechanical resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a bitumen support layer is used, then adhesion to bitumen membranes is improved, but environmental impact and emissions increase

Engineering Contradiction:

Improveadhesion to bitumen membraneVSAvoidemissions

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the material parameter from bitumen to thermoplastic resin, fundamentally altering the chemical composition while maintaining the adhesion function through different mechanisms (melting and bonding vs. torch application)

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the environmentally harmful bitumen with a more sustainable thermoplastic resin that can be processed without open flames, reducing environmental impact while achieving the same functional result

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Object-generated harmful factors

If a mineralized support layer is used, then environmental sustainability is improved, but adhesion versatility and fastening suitability deteriorate

Engineering Contradiction:

Improveenvironmental impactVSAvoidfastening suitability

Core Design Contradiction:

Object-generated harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent creates a universal support layer using thermoplastic resin that can bond with both plastic membranes and bitumen membranes, as well as provide mechanical fastening capability, making it adaptable to multiple waterproofing membrane types without requiring different support layer compositions

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Temperature

If a bitumen support layer is used, then thermal insulation properties are improved, but flexibility and windability deteriorate

Engineering Contradiction:

Improvethermal insulationVSAvoidflexibility and windability

Core Design Contradiction:

TemperatureVSEase of operation

Solution Approach 1:

The patent changes the material state and processing temperature parameters, using thermoplastic resin that can be processed at lower temperatures without open flames, maintaining flexibility and windability while achieving thermal insulation through the resin's thermal bonding properties rather than bitumen's torch application

Inventive Principle:

Principle #35Parameter changes

4Reliability

If open flame torch application is used, then adhesion to bitumen membranes is improved, but safety and environmental impact worsen

Engineering Contradiction:

Improveadhesion to bitumen membraneVSAvoidsafety risks

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the thermal-mechanical torch application process with a chemical bonding process using thermoplastic resin that bonds through melting and cooling without requiring open flames, substituting a safer chemical mechanism for a potentially dangerous thermal-mechanical one

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent eliminates the need for open flame torch application by using thermoplastic resin that can be processed without fire, reducing safety risks while achieving the same adhesion function through a safer processing method

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

Facilitates adhesion and fastening of waterproofing membranes to insulating panels without open flames, ensuring flexibility, mechanical strength, and wide temperature applicability, while reducing environmental impact.

Implementation Method 1

coated with a thermoplastic compound, allowing adhesion to both plastic and bitumen membranes through hot air heating

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

The thermoplastic compound used for the coating layer (3) is selected so that, when heating at an activation temperature higher than 130°, a softening of the coating layer (3) occurs

Methodology Applied

Scientific EffectMelting: Melting

Data Source

PatentEP3546208B1Flexible backing layer for insulating panels and insulating panel and manufacturing method

Publication Date: 2025.08.20 ELEMENTS

Figure 1~3

AI summary

A support layer (2) for an insulating construction panel (1) comprises a reinforcing layer (4) made of a fibrous material intended to face and be connected to the main layer (6) of the insulating panel (1), as well as a coating layer (3), in which the coating layer (3) is made by applying a dispersion of at least one thermoplastic polymer on the reinforcing layer (4), followed by drying. The at least one thermoplastic polymer of the coating layer (3) is selected so that, when heating at an activation temperature higher than 130°, a softening of the coating layer (3) occurs.