Multi-layer Composite Wall Covering for Kitchen Surfaces
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Solution Overview
Problem
Existing wall coverings for kitchens, particularly in kitchenettes, face issues with mechanical flexural rigidity, leading to material settling and detachment from uneven surfaces, and inadequate adhesion on structured surfaces like woodchip wallpaper, due to low rigidity and material shrinkage over time.
Innovation Solution
A multi-layer composite wall covering comprising an upper and lower hard plastic layer, a pressure-resistant plastic core layer, and a softer foam layer, with an adhesive layer, enhancing mechanical flexural rigidity and adhesion by conforming to the wall surface, while reducing material shrinkage and shear forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a homogeneous flexible foil is used for wall covering, then the material can conform to wall surfaces, but the mechanical flexural rigidity is low causing the material to settle into joints and bumps
Solution Approach 1:
The patent applies composite materials by combining a flexible foil layer with a reinforcement layer made of spaced-apart profile elements (such as aluminum or plastic profiles). This composite structure provides both the conformability of the flexible material and the mechanical rigidity of the reinforcement profiles, preventing the wall covering from settling into joints and bumps while maintaining adaptability to wall surfaces.
Solution Approach 2:
The reinforcement layer is segmented into spaced-apart profile elements rather than a continuous rigid structure. This segmentation allows the reinforcement to provide mechanical strength and prevent sagging while still permitting the flexible foil to conform to wall irregularities. The spaced profiles create zones of flexibility between them, resolving the contradiction between rigidity and conformability.
2Volume of moving object
If the foil is made thicker to cover wall structures, then some coverage is achieved, but local bumps still show through and adhesive bonding is insufficient
Solution Approach 1:
Instead of increasing foil thickness, the patent uses a composite structure with a flexible foil layer combined with a reinforcement layer of spaced profiles. This provides structural support to bridge over wall irregularities without requiring excessive foil thickness, while the profiles themselves create a mechanically robust substrate for adhesive bonding that is more reliable than thick foil alone.
Solution Approach 2:
The patent transitions from a two-dimensional flat foil to a three-dimensional composite structure with vertically extending profile elements. These profiles create a raised framework that physically bridges over wall bumps and joints, providing coverage through dimensional elevation rather than increased material thickness, thereby maintaining thin-profile advantages while achieving reliable coverage.
3Ease of manufacture
If plastics are used for wall covering, then material shrinkage occurs over time causing shearing forces that can detach the film from the wall
Solution Approach 1:
The patent combines plastic or vinyl flexible foil with reinforcement profiles made of dimensionally stable materials such as aluminum or rigid plastic. The reinforcement layer compensates for the shrinkage and dimensional changes of the flexible foil over time, maintaining the overall structural integrity and preventing detachment from the wall while retaining the manufacturing simplicity of plastic-based materials.
Solution Approach 2:
The reinforcement profiles act as a counteracting structural element that resists the shrinkage forces generated by the flexible plastic foil. As the foil attempts to shrink over time, the rigid profiles provide opposing mechanical support, balancing the dimensional changes and preventing the accumulation of shearing forces that would lead to adhesive failure and detachment.
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 ensures a flat surface coverage, improved adhesion, and reduced risk of detachment, even on irregular surfaces, with increased mechanical flexural rigidity and effective adhesive bonding, allowing for easier installation and long-term stability.
Implementation Method 1
The foam layer is plastically deformable and fills in elevations and depressions in the wall surface, thereby enhancing the flatness effect
Implementation Method 2
A further advantage is that the adhesive layer also conforms to the structured surface of the wall surface, which increases the effective adhesive surface. This improves the adhesion of the wall covering to the wall surface
Implementation Method 3
Due to the multi-layer composite of the two layers of hard plastic and the middle core layer, the mechanical flexural rigidity increases considerably, approximately threefold compared to a film of the same strength but homogeneous or single layer
Data Source
Figure 1~2
AI summary
The invention relates to a wall covering (1) for a kitchen. To ensure a flat surface of the wall covering and to improve the adhesion of the wall covering to the wall surface, it is proposed that it comprises a multilayer composite with the following layers: a) an upper layer (2) made of hard plastic, b) a similar lower layer (4) made of hard plastic, c) a core layer (3) made of pressure-resistant plastic arranged between these two layers (2, 4), d) a softer foam layer (5) arranged on the lower layer (4) made of hard plastic, and e) a lower adhesive layer (6) arranged on the foam layer (5) for bonding to a kitchen wall (7).