Pressure-Sensitive Adhesive Waterproof Membrane for Vertical Surfaces

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Solution Overview

Problem

Existing methods for waterproofing vertical surfaces, such as parapet walls, using flashing membranes are challenging due to the high weight of membrane rolls, environmental concerns related to solvent-based adhesives, and the need for complex contact bonding processes that are time-consuming and prone to errors.

Innovation Solution

A method involving the use of an adhesive element with a pressure-sensitive adhesive layer and a release liner, applied to a vertical substrate surface, followed by the installation of a waterproof membrane, which eliminates the need for contact bonding and reduces environmental impact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If contact bonding with solvent-based adhesives is used to fasten flashing membranes to vertical surfaces, then the membrane can be securely attached, but volatile organic compound emissions occur and the process becomes complex and time-consuming

Engineering Contradiction:

Improvemembrane attachment securityVSAvoidvolatile organic compound emissions

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention changes the chemical composition parameter of the adhesive from solvent-based to water-based, eliminating volatile organic compound emissions while maintaining adhesive performance for securing flashing membranes to vertical surfaces

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention replaces the complex contact bonding process with a self-adhering membrane system that uses pressure-sensitive adhesive layers, simplifying the installation process and eliminating the need for solvent-based adhesives

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If contact bonding process is used for installing flashing membranes, then the membrane can be fastened to vertical surfaces, but the installation becomes time-consuming and prone to errors

Engineering Contradiction:

Improvemembrane fastening capabilityVSAvoidinstallation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The flashing membrane is pre-equipped with a pressure-sensitive adhesive layer and release liner during manufacturing, so that at the time of installation, the user simply needs to peel the release liner and press the membrane against the substrate, eliminating the need for time-consuming contact bonding processes

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The membrane's self-adhering property through the pressure-sensitive adhesive layer allows it to bond to vertical surfaces through simple pressure application, without requiring complex adhesive application processes or specialized equipment

Inventive Principle:

Principle #25Self-service

3Reliability

If solvent-based adhesives are used to secure flashing membranes, then the membrane can be attached to vertical surfaces, but environmental impact increases

Engineering Contradiction:

Improvemembrane attachment strengthVSAvoidenvironmental impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention changes the adhesive formulation from solvent-based to water-based, fundamentally altering the chemical composition to eliminate harmful volatile organic compound emissions while preserving the membrane's attachment strength to vertical surfaces

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention converts the potential harm of requiring strong adhesive bonding into a benefit by using water-based adhesives that provide sufficient bond strength while being environmentally friendly and eliminating harmful emissions

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

This method enables efficient and error-reduced installation of waterproof membranes on vertical surfaces, avoiding volatile organic compound emissions and allowing for use in cold temperatures, thereby improving installation efficiency and reducing application errors.

Implementation Method 1

an adhesive element (2) comprising a pressure sensitive adhesive layer (3) having first and second primary exterior surfaces

Methodology Applied

Scientific EffectPressure-sensitive adhesive bonding: Adhesive

Data Source

PatentUS20250052064A1Method for installing a waterproof membrane on a vertical surface

Publication Date: 2025.02.13 SIKA TECH AG

AI summary

A method for waterproofing a substrate having a substantially vertical surface using an adhesive element and a waterproof membrane. The adhesive element includes a pressure sensitive adhesive layer coated and a release liner covering one of the primary exterior surfaces of the adhesive layer. In the method, the adhesive element is applied to the surface of the substrate followed by adhering the waterproof membrane to the substrate via the pressure sensitive adhesive layer.