Fire-Resistant Resin Sleeve Composition for Short Wall Penetrations
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Solution Overview
Problem
Conventional fire-resistant sleeves for sealing wall penetration holes collapse before thermal expansion, allowing flames and smoke to spread, and require a minimum length of 150 mm for effective performance, limiting installation locations and increasing production costs.
Innovation Solution
A fire-resistant resin composition is manufactured by mixing pentaerythritol, ammonium polyphosphate, melamine resin, and silicone resin, with additives like platinum catalyst and graphite, which is extrusion-molded into a 50-70 mm sleeve shape, maintaining shape until thermal expansion at 160°C to seal holes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional foam materials are used for fire-resistant sleeves, then fire resistance function is provided, but the sleeves collapse before thermal expansion and require a minimum length of 150 mm
Solution Approach 1:
The patent uses a composite material system consisting of silicone resin as the base polymer, pentaerythritol as the foaming agent, ammonium polyphosphate as the flame retardant, and melamine resin as the curing agent. This composite structure provides both shape stability at room temperature and controlled thermal expansion at fire temperatures, resolving the contradiction between maintaining shape before expansion and achieving fire resistance function.
Solution Approach 2:
The patent modifies the chemical composition parameters of the foam material by incorporating specific ratios of pentaerythritol (10-50 parts by weight), ammonium polyphosphate (30-60 parts by weight), and melamine resin (5-30 parts by weight) relative to silicone resin (100 parts by weight). These parameter changes enable the material to maintain structural integrity at low temperatures while achieving controlled expansion at fire temperatures, eliminating the need for minimum length requirements.
2Ease of operation
If the sleeve length is reduced to 50-70 mm for easier installation, then installation constraints are reduced, but fire resistance performance may be compromised
Solution Approach 1:
The patent changes the material composition parameters to achieve higher expansion ratios and better thermal stability. The specific formulation with 10-50 parts pentaerythritol, 30-60 parts ammonium polyphosphate, and 5-30 parts melamine resin per 100 parts silicone resin enables short sleeves (50-70 mm) to achieve sufficient fire resistance through controlled thermal expansion, maintaining reliability while improving ease of operation.
Solution Approach 2:
The patent utilizes controlled thermal expansion of the foam material at fire temperatures to achieve fire sealing function. The pentaerythritol-ammonium polyphosphate-melamine resin system provides predictable and controlled expansion behavior that ensures effective fire resistance even in shortened sleeves (50-70 mm), resolving the contradiction between installation convenience and fire resistance performance.
3Reliability
If thermally expandable flame retardants are used to seal wall-penetrating holes, then fire spread prevention is achieved, but the materials must be applied in a compressed state which reduces workability
Solution Approach 1:
The patent employs a self-curing silicone resin system where the material automatically cures at room temperature after application without requiring compression or special handling. The silicone resin with platinum catalyst provides self-service functionality, eliminating the need for post-application compression operations and significantly improving workability while maintaining fire spread prevention capability.
Solution Approach 2:
The patent replaces the mechanical compression system with a chemical curing system. Instead of requiring mechanical compression to maintain the material in a compressed state, the silicone resin system uses chemical crosslinking to achieve the desired properties, substituting mechanical operations with chemical processes that improve ease of operation while maintaining fire resistance.
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 composition ensures effective fire resistance and heat insulation with shape retention, preventing flame and smoke spread, reducing production costs and installation constraints.
Implementation Method 1
In the event of a fire, the fire-resistant member is installed in a wire penetration hole of a wall structure and, in the event of a fire, foams and expands by the heat of the fire
Implementation Method 2
the fire-resistant member, despite being molded with a short length, exhibits excellent fireproofing and heat insulation, hardly collapses in shape until the fire-resistant member reaches its foam temperature in the event of a fire
Implementation Method 3
foams and expands by the heat of the fire
Implementation Method 4
hardly collapses in shape until the fire-resistant member reaches its foam temperature in the event of a fire
Data Source
AI summary
Disclosed is a method for manufacturing a fire-resistant resin composition, a fire-resistant member manufactured from the composition, and a method for manufacturing the fire-resistant member, wherein fire-resistant members are installed in a wire penetration hole of a wall structure and, in the event of a fire, foam and expand by the heat of the fire to prevent the spread of the fire across the wall structure.