Segmented Foam Sealing Tape for Uneven Masonry Walls

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Solution Overview

Problem

Existing sealing tapes with interior barrier layers suffer from reduced water vapor impermeability due to gaps formed between the barrier layer and the uneven masonry wall surface, leading to incomplete contact and compromised sealing performance.

Innovation Solution

A method for producing a sealing tape roll with a foam-barrier layer web, where a cover layer is applied and then parted to form subsections that cover the interior barrier layers, ensuring direct contact with the masonry wall and increased contact area, thereby preventing water vapor diffusion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a barrier layer is added to increase water vapor resistance, then water vapor impermeability is improved, but the ability to conform to uneven wall surfaces deteriorates due to the stiff nature of the barrier layer

Engineering Contradiction:

Improvewater vapor impermeabilityVSAvoidconformability to uneven surfaces

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The sealing tape is divided into multiple foam strips arranged next to each other, with barrier layers positioned between adjacent foam strips. This segmentation allows the foam strips to independently conform to surface irregularities while the barrier layers maintain their water vapor resistance function, resolving the contradiction between impermeability and conformability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the sealing tape are assigned different functions: foam strips provide flexibility and conformability to uneven surfaces, while barrier layers positioned between them provide water vapor resistance. This local differentiation allows each component to optimize its specific function without compromising the other.

Inventive Principle:

Principle #3Local quality

2Reliability

If the barrier layer is made stiffer to improve barrier performance, then water vapor diffusion resistance is improved, but contact with uneven masonry wall surfaces deteriorates

Engineering Contradiction:

Improvewater vapor diffusion resistanceVSAvoidcontact uniformity with wall surface

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The sealing structure is segmented into alternating foam strips and barrier layers. The foam strips act as flexible elements that can deform to match wall surface irregularities, ensuring uniform contact, while the barrier layers maintain their rigid structure for effective water vapor diffusion resistance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sealing tape combines different materials with complementary properties: flexible foam material for conformability and rigid barrier material for water vapor resistance. This composite structure allows the sealing tape to simultaneously achieve both contact uniformity and diffusion resistance.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS12311628B2Method for producing a sealing tape roll and sealing tape

Publication Date: 2025.05.27 ISO CHEM GMBH

AI summary

A method for producing a sealing tape roll comprises the steps of providing a foam-barrier layer web comprising a plurality of foam strips, wherein a barrier layer is arranged between each pair of adjustment foam strips; applying a cover layer to the foam-barrier layer web; parting the cover layer in the longitudinal direction in an area of at least two foam strips and a certain distance away from each barrier layer adjacent to these foam strips, thus forming subsections of the cover layer, wherein a subsection of the cover layer at least partially covers two adjacent foam strips; and forming a sealing tape roll from the coated foam-barrier layer web.