Layered Firestop Seal with Directed Intumescence for Passage Openings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fire protection elements suffer from 'negative intumescence' due to random orientation of physically acting blowing agents, leading to inefficient sealing of passage openings and increased material loss during expansion.
Innovation Solution
A fire protection element with a layered body comprising a fire protection layer and a functional layer, where the fire protection layer includes a carrier material and a structurally anisotropic, physically intumescent material with particles aligned in parallel, and the functional layer is semi-rigid to counteract compression and control expansion direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If physically acting blowing agents are randomly distributed in fire protection elements, then the material expands uniformly in all three spatial directions, but this leads to lateral pushing out of the passage opening and reduced compression rate of conduits
Solution Approach 1:
The blowing agents are oriented asymmetrically with their expansion direction aligned perpendicular to the inner wall surface of the passage opening. This asymmetric orientation ensures that expansion force is directed toward closing the passage opening rather than pushing material laterally outward, thereby improving closure ability while maintaining controlled expansion.
Solution Approach 2:
The blowing agents are selectively oriented in different directions depending on their location within the fire protection element. Those closer to the inner wall surface are oriented perpendicular to it, while others may have varying orientations. This local quality variation optimizes the expansion direction at each location to maximize passage opening closure effectiveness.
2Productivity
If physically acting blowing agents are randomly oriented, then the expansion occurs in all three spatial directions, but this causes material to be pushed laterally out and exposes it to mechanical stresses
Solution Approach 1:
By orienting blowing agents asymmetrically with expansion direction perpendicular to the inner wall surface, the expansion is channeled in a controlled manner toward the passage opening closure. This prevents lateral pushing out of material that would otherwise be exposed to damaging mechanical stresses from extinguishing water jets and air currents, thereby reducing material loss.
3Stability of the object's composition
If blowing agents expand in all three spatial directions, then uniform expansion is achieved, but this reduces the compression rate of conduits and extends closure time
Solution Approach 1:
The blowing agents are oriented asymmetrically so that their expansion direction is predominantly perpendicular to the inner wall surface of the passage opening. This asymmetric orientation concentrates expansion force in the direction needed for rapid closure, increasing the compression rate of conduits and reducing closure time compared to isotropic expansion in all directions.
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 effectively reduces lateral pushing out of expanded material, enhances the closure ability of passage openings, and minimizes material loss, while also reducing the amount of physically acting blowing agent required.
Implementation Method 1
a fire protection layer (2) comprising a carrier material (4) and a large number of particles of at least one layered, physically acting blowing agent (5)
Implementation Method 2
the functional layer (3) comprises at least one semi-rigid material
Data Source
AI summary
A fire protection element containing a layered body can be utilized for sealing passage openings in components, such as building components, through which conduits are guided. A method can be used for producing the fire protection element. The fire protection element can be used for sealing passage openings and/or joints in components against fire and flue gases.