Multilayer Film Web with Perpendicular Flocking for Plaster Adhesion
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Solution Overview
Problem
Existing multi-layer film webs used in the construction sector for sealing and insulation, such as those between windows and structures, face challenges with insufficient plaster adhesion, particularly when attempting to plaster over or attach to surfaces, leading to suboptimal sealing and adhesion strengths.
Innovation Solution
A multi-layer film web with a planar plastic first layer and a second layer, where particulate material, specifically flocking, is applied to at least one surface in a perpendicular orientation, enhancing plaster adhesion by eliminating direct particle bonding and improving adhesion strength to both exterior and interior plaster.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer film web with plastic layers is used for sealing, then watertight and airtight sealing is achieved, but plaster adhesion is insufficient
Solution Approach 1:
The patent applies a particulate material (flocking) to only one surface of the film web, creating local quality differentiation. The flocking layer is applied selectively to the surface that requires plaster adhesion, while the other surface maintains its sealing properties. This localized application resolves the contradiction by providing enhanced adhesion only where needed without compromising the overall sealing performance of the film web.
Solution Approach 2:
The patent creates a composite structure by combining the plastic film web with a particulate material (flocking). This composite material integrates the sealing properties of the plastic layer with the adhesion properties of the flocking particles. The composite structure achieves both watertight/airtight sealing and improved plaster adhesion simultaneously, resolving the technical contradiction between these two requirements.
2Reliability
If self-adhesive butyl tapes with fleece are used for sealing, then airtight and windproof sealing is achieved, but the thickness is large and additional mechanical fastening is required
Solution Approach 1:
The patent uses a thin film web structure instead of thick butyl tapes. The film web provides the necessary sealing function while maintaining a thin profile that eliminates the need for additional mechanical fastening. The flexibility of the thin film allows it to conform to surfaces and provide effective sealing without the complexity of fastening systems required by thicker materials.
3Reliability
If diffusion-blocking film webs are used for window frames, then watertight and airtight sealing is achieved, but plaster adhesion is insufficient
Solution Approach 1:
The patent applies particulate material (flocking) to one surface of the film web to create local quality differentiation. The flocking is applied to the surface that contacts the plaster, providing enhanced adhesion properties only where needed. This resolves the contradiction by maintaining the diffusion-blocking sealing properties of the film while adding adhesion capability at the specific interface with plaster.
Solution Approach 2:
The patent creates a composite structure by combining the diffusion-blocking film web with a particulate material layer. This composite provides both the vapor diffusion blocking properties of the film and the improved plaster adhesion of the particulate material, simultaneously resolving both requirements without compromising either function.
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 film web achieves significantly improved plaster adhesion, doubling the usual values, with adhesive forces exceeding 11 N/cm² for exterior plaster and 15 N/cm² for interior plaster, allowing for easier and more effective plastering and sealing.
Implementation Method 1
a particulate material is attached to at least one of these surfaces at least in sections and over a large area, the particulate material being flocking, the particulate material being oriented with a longitudinal direction perpendicular to the surface to be stained
Data Source
Figure 1a~2a
Figure 2b~2c
AI summary
A multilayer film web (1), particularly for use in the construction sector, comprising a planar, film-like first layer (2) extending in a first direction (E) and made of a plastic, and a planar second layer (4) arranged on this film-like support layer (2), wherein this composite has a first surface (12) extending in the direction (E) and a second surface (14) extending in the direction (E), and this second surface (14) is opposite the first surface (12). According to the invention, a particle material (6) is attached to at least one of these surfaces, at least sectionally and planarly.