Adhesive Tape With Barrier Layer Preventing Compound Migration
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Solution Overview
Problem
Existing adhesive systems face challenges with optical quality, handling issues, and reduced storage stability due to adhesive migration between different layers, particularly when combining reactive or activatable adhesives with other adhesive compositions, which affects bonding strength and stability.
Innovation Solution
A surface element featuring a first partial area of a first adhesive, a second partial area of a second adhesive, and a barrier layer arranged perpendicularly between them, preventing adhesive migration and maintaining storage stability while allowing for the combination of adhesive properties without reducing adhesive strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different adhesives are applied side by side on one adhesive tape to fulfill multiple functions (sealing, damping, stiffening), then the adhesive tape can perform additional functions besides permanent bonding, but adhesive components may migrate from one adhesive to another, resulting in reduced adhesive strength and storage stability
Solution Approach 1:
A barrier layer is introduced as an intermediary element between different adhesive compounds on the adhesive tape. This barrier layer prevents direct contact and migration of adhesive components between different adhesive zones, thereby maintaining storage stability and adhesive strength while allowing the tape to carry multiple different adhesives for various functions.
Solution Approach 2:
The adhesive tape is segmented into distinct adhesive zones separated by barrier layers. Each adhesive compound is confined to its own designated area, preventing mixing and migration. This segmentation allows each adhesive to maintain its specific properties and function without interfering with other adhesives on the same tape.
2Adaptability or versatility
If multiple different adhesives are applied side by side on one adhesive tape to fulfill multiple functions, then the adhesive tape can perform additional functions besides permanent bonding, but adhesive components may migrate from one adhesive to another, resulting in reduced adhesive strength
Solution Approach 1:
The barrier layer acts as a mediator that physically separates different adhesive compounds, preventing the migration of adhesive components between zones. This ensures that each adhesive maintains its original composition and bonding strength, while the tape as a whole provides multiple functions through the different adhesives.
3Ease of manufacture
If liquid adhesive is used to join two substrates, then bonding can be achieved, but bubbles or shrinkage can occur which significantly reduces optical quality, and liquid adhesive can leak between the substrates
Solution Approach 1:
The adhesive system transitions from liquid adhesive to pressure-sensitive adhesive in the form of a tape. This parameter change eliminates the fluidity issues of liquid adhesives (bubbles, shrinkage, leakage) while maintaining effective bonding capability. The pressure-sensitive adhesive provides immediate adhesion without the defects associated with liquid adhesive application.
4Ease of operation
If double-sided self-adhesive tapes are used to join two substrates, then ease of handling and processing is achieved with high tackiness, but the adhesive tapes must fulfill additional functions (sealing, damping, stiffening) which requires combining multiple different adhesives
Solution Approach 1:
Multiple different adhesive compounds are merged onto a single adhesive tape, each serving different functions (permanent bonding, sealing, damping, stiffening). The barrier layers are integrated into the tape structure to separate these adhesives, creating a unified product that combines multiple functions while maintaining ease of handling and processing.
Data Source
Figure 1a~1b
Figure 2
Figure 3a~3c
AI summary
The present invention relates to a two-dimensional element, which comprises a first subarea T1 of a first adhesive compound K1, at least one second subarea T2 of a second adhesive compound K2, which is different from the adhesive compound K1, and at least one barrier layer, wherein the at least one first subarea T1 and the at least one second subarea T2 are arranged next to one another in one plane and wherein the barrier layer is arranged perpendicularly between the at least one first subarea T1 and the at least one second subarea T2. The present invention also relates to a method for adhesively bonding two parts to be joined, wherein a two-dimensional element according to the invention is applied to a first part to be joined and then a second part to be joined is joined to the first part to be joined, provided with the two-dimensional element. The present invention also relates to a kit of parts, which contains a part to be joined and a two-dimensional element according to the invention, or two subareas T1 and T2, which are separate from one another, wherein one subarea comprises a barrier layer. Finally, the present invention relates to the use of a two-dimensional element according to the invention for the application of an active substance.