Segmented Adhesive Separation Tape for Drywall
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Solution Overview
Problem
Existing separating strips in dry construction often bend due to environmental changes, leading to incomplete or unsatisfactory filler joints and difficulty in removal, resulting in a visually unsatisfactory impression.
Innovation Solution
A release tape with two main surfaces, where one surface is divided into areas with different adhesive strengths, and the carrier material is either coated or fleeced with synthetic fibers, allowing for controlled adhesion and reduced bending, featuring a pressure-sensitive adhesive and an adhesive-free area for easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the separating tape is made with a self-adhesive strip, then the tape can be easily applied to the solid component, but the non-adhesive part of the tape curls up under changing environmental conditions causing incomplete filler joints and visual defects
Solution Approach 1:
The adhesive area is segmented into two distinct zones: a first adhesive area with strong adhesion for securing the tape to the solid component, and a second adhesive area with weak adhesion that allows the non-adhesive part to remain flat and controllable during filler application and removal
Solution Approach 2:
Different adhesive strengths are applied to different locations on the tape. The first adhesive area (near the edge) provides strong bonding to prevent tape movement, while the second adhesive area (central region) provides controlled, weaker bonding that prevents curling and allows precise filler application
2Reliability
If the separating tape curls up due to environmental changes, then the tape cannot be completely filled with joint compound, but using stronger adhesive to prevent curling makes removal difficult
Solution Approach 1:
The adhesive bonding is segmented into strong and weak areas, allowing the tape to remain stable during filler application while enabling easy removal after the filler dries. The strong first adhesive area prevents tape displacement, while the weak second adhesive area allows clean removal without damaging the filler joint
Solution Approach 2:
The adhesive strength parameter is varied across different areas of the tape. The first adhesive area uses high-strength adhesive for reliable bonding, while the second adhesive area uses low-strength adhesive that allows easy removal after serving its function of preventing curling during filler application
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 effectively reduces bending of the separating strip, ensures complete and clean filler application, and facilitates easy removal, resulting in a precise and visually appealing connection.
Implementation Method 1
a self-adhesive strip on one side of the front side in the direction of travel
Data Source
Figure 1~5
AI summary
Disclosed is a separation strip comprising two main surfaces that include a backing material and adhesive; a first main surface is subdivided into at least two regions along an axis in the direction of the web, and the at least two regions are at least partly coated with adhesive (2, 3) and have adhesive forces that are different from one another.