Non-Porous Adhesive Article for Gypsum Board Joint Sealing
Solution Overview
Problem
Gypsum board joints in fire walls are prone to compromising the fire rating due to gaps between panels, necessitating effective sealing to prevent flame and water penetration.
Innovation Solution
An adhesive article with a non-porous, high-adhesion substrate and adhesive layer is applied to the seams between gypsum board panels, ensuring a strong bond and preventing air and gas passage, while maintaining fire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard joint systems are used to cover gypsum board seams, then the fire rating may be maintained, but the installation process is complex and time-consuming
Solution Approach 1:
The patent combines multiple functions into a single adhesive article: the sealing function, the adhesive bonding function, and the fire rating function are all integrated into one product. This eliminates the need for separate sealing materials and simplifies the installation process while maintaining fire safety requirements.
Solution Approach 2:
The adhesive article serves multiple purposes simultaneously: it seals the joint gap, provides structural adhesion to bond gypsum boards, and maintains the fire rating. This multi-functionality reduces the number of steps required in the joint system installation.
2Ease of operation
If gaps between gypsum board panels are left uncovered, then installation is simpler, but flame and water penetration occurs compromising fire safety
Solution Approach 1:
The adhesive article is designed with a specific geometry that segments the joint area into an adhesive application zone and a non-porous sealing zone. This segmentation allows the article to simultaneously provide simple installation through adhesive bonding and fire safety through the non-porous seal over the gap.
Solution Approach 2:
The non-porous portion of the adhesive article acts as an intermediary barrier element that bridges the gap between gypsum board panels. It provides the necessary seal against flame and water penetration while the adhesive portions provide bonding, combining sealing and attachment functions in one component.
3Reliability
If a non-porous adhesive article is used to seal seams, then fire resistance is maintained, but adhesion to gypsum board paper surface may be insufficient
Solution Approach 1:
The adhesive article has different properties in different zones: the portions that contact the gypsum board paper surface have high adhesion characteristics, while the portion covering the joint gap is non-porous for fire resistance. This local differentiation of properties resolves the contradiction between adhesion and fire resistance.
Solution Approach 2:
The adhesive article is constructed as a composite structure combining materials with different properties: adhesive materials for bonding to the paper surface and non-porous materials for fire resistance. This composite construction allows simultaneous achievement of adhesion strength and fire safety.
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 adhesive article effectively seals the seams, maintaining the fire rating of the gypsum board assembly by preventing flame and water penetration, and is easy to use, aesthetically pleasing, and durable over the lifetime of the construction.
Implementation Method 1
an adhesive is disposed on the first major surface and the opposing second major surface has a surface free energy of at least 29 mN/m, and wherein the adhesive article has an adhesion to gypsum board of at least 45 oz/in (0.49 N/mm)
Data Source
AI summary
Described herein is a method of using an adhesive article on a gypsum board construction assembly. The gypsum board construction assembly has a first gypsum board unit and a second gypsum board unit defining a space therebetween, the method comprises obtaining the adhesive article, wherein the adhesive article comprises a first major surface and an opposing second major surface, wherein an adhesive is disposed on the first major surface and the opposing second major surface has a surface free energy of at least 29 mN/m, and wherein the adhesive article has an adhesion to gypsum board of at least 45 oz/in (0.49 N/mm); and fixedly attaching the adhesive article via the adhesive to a first and second attachment areas, wherein the first gypsum board unit comprises an outer paper surface and the second gypsum board unit comprises an outer paper surface and the first attachment area is on the outer paper surface of the first gypsum board unit and the second attachment area is on the outer paper surface of the second gypsum board unit, and wherein the portion of the adhesive article disposed over the space is non-porous.