Non-Porous Adhesive Firestop for Penetration Sealing
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Solution Overview
Problem
Existing firestop systems for construction assemblies with penetrations often compromise the fire rating of building materials, and current methods for sealing these penetrations are cumbersome, especially in dirty or wet conditions, and may not effectively prevent the spread of fire and gases.
Innovation Solution
A firestop system comprising a non-porous adhesive article and a packing material, where the adhesive article is fixedly attached to the perimeter of the penetration, providing a seal that withstands high temperatures and movement, and the packing material acts as a thermal barrier to maintain the fire rating of the construction assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional firestop materials and methods are used to seal penetrations, then fire rating can be maintained, but the application process becomes cumbersome and difficult in dirty or wet conditions
Solution Approach 1:
The firestop system is divided into two functional segments: a non-porous adhesive article for sealing the penetration opening and a packing material for filling the penetration space. This segmentation allows each component to be optimized independently - the adhesive article provides easy application like tape while the packing material provides fire stopping capability.
Solution Approach 2:
The non-porous adhesive article acts as an intermediary barrier between the penetration opening and the environment. It provides a reliable seal that is not affected by dirty or wet conditions, mediating the connection between the packing material inside and the external environment, thereby ensuring consistent fire stopping performance regardless of application conditions.
2Reliability
If penetrations are sealed to prevent fire spread, then fire rating is maintained, but the system must withstand high temperatures and movement while remaining easy to apply
Solution Approach 1:
The adhesive article utilizes pressure-sensitive adhesive technology that changes its properties based on temperature and pressure conditions. At application temperatures, the adhesive is soft and conformable for easy application. At fire temperatures, the adhesive maintains its bonding strength while the non-porous substrate provides thermal resistance, effectively changing the system's thermal parameters to withstand fire conditions.
Solution Approach 2:
The firestop system employs composite materials combining a non-porous substrate (providing fire resistance and structural integrity) with a pressure-sensitive adhesive layer (providing bonding and conformability). This composite structure achieves both fire resistance and ease of application without requiring complex installation procedures or additional components.
3Ease of operation
If a non-porous adhesive article is used to seal penetrations, then ease of application improves, but the material must effectively prevent passage of flame and hot gases
Solution Approach 1:
The system deliberately uses a non-porous (low porosity) adhesive article to prevent the passage of flame and hot gases through the seal. The non-porous nature of the substrate and adhesive combination creates an effective barrier that blocks the transport of combustion products, while the pressure-sensitive adhesive provides ease of application similar to conventional tape materials.
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 system effectively maintains the fire rating of construction assemblies by preventing the spread of fire and gases, passing rigorous fire tests such as ASTM E814 and UL 1479, and can be applied easily in various conditions without prior cleaning or priming, ensuring a reliable seal even in the presence of dust or water.
Implementation Method 1
a non-porous adhesive article comprising a substrate and an adhesive disposed on a first major surface of the substrate; wherein the non-porous adhesive article is fixedly attached to the first attachment area
Implementation Method 2
the packing material acts as a thermal barrier to maintain the fire rating of the construction assembly
Data Source
AI summary
Described herein is a firestop for construction assemblies comprising a penetration wherein a packing material and a non-porous adhesive article are used to fill and seal the opening.