Cooling System Hose Composition for Flame and Electrical Insulation
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Solution Overview
Problem
Conventional cooling system hoses for data centers lack sufficient flame resistance and insulation properties, failing to meet UL-94 V-0 flammability and non-conductive requirements, posing a risk to data center operations during fires.
Innovation Solution
A composition comprising a blend of ethylene-propylene-diene monomer, chlorinated polyethylene, silica, kaolinite, alumina trihydrate, antimony trioxide, and zinc borate, which provides enhanced flame resistance and non-conductivity, meeting UL-94 V-0 and ISO 8031 standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ethylene-propylene-diene monomer cover compounds are used in cooling system hoses, then the hoses maintain good mechanical properties and flexibility, but they fail to achieve sufficient flame resistance and insulation properties required for data center applications
Solution Approach 1:
The patent applies composite materials by combining EPDM elastomer with multiple flame retardant additives (silica, kaolinite, alumina trihydrate, antimony trioxide, zinc borate) and chlorinated polyethylene to create a multi-component composition that achieves UL-94 V-0 flame resistance while maintaining mechanical properties. This composite approach resolves the contradiction by integrating multiple functional materials into a single hose composition that simultaneously provides flexibility and flame resistance.
Solution Approach 2:
The patent changes the chemical composition parameters of the cover compound by incorporating chlorinated polyethylene (4-20 phr) and specific ratios of flame retardants (silica 8-15 phr, kaolinite 20-35 phr, alumina trihydrate 80-120 phr, antimony trioxide 10-25 phr, zinc borate 5-15 phr). These parameter changes transform the conventional EPDM compound into a flame-resistant composite that meets UL-94 V-0 standards while preserving mechanical flexibility.
2Reliability
If conventional polymeric materials are used to achieve flame resistance, then fire resistance improves, but insulation properties and non-conductive requirements are not sufficiently met
Solution Approach 1:
The patent applies local quality by selecting specific flame retardant materials (silica, kaolinite, alumina trihydrate) that provide both flame resistance and electrical insulation properties. These materials are distributed throughout the EPDM matrix to create localized insulating zones that collectively provide overall non-conductive protection, resolving the contradiction between flame resistance and insulation requirements.
Solution Approach 2:
The composite composition combines EPDM elastomer with electrically insulating flame retardants (silica, kaolinite, alumina trihydrate) and chlorinated polyethylene to create a material that simultaneously provides flame resistance (UL-94 V-0) and electrical insulation (≥10^6 ohms at 500V DC). This multi-material approach resolves the contradiction by integrating materials that fulfill both safety requirements.
3Reliability
If halogen-containing flame retardants are used to achieve UL-94 V-0 standard, then flame resistance is improved, but environmental concerns and potential toxicity increase
Solution Approach 1:
The patent converts the potential harm of halogen-containing flame retardants into benefit by using halogen-free alternatives (silica, kaolinite, alumina trihydrate, antimony trioxide, zinc borate) that provide equivalent or superior flame resistance without toxicity. The chlorinated polyethylene component provides flame retardancy through chlorine content (30-40%) while the overall composition maintains environmental compatibility by balancing halogen content and using eco-friendly additives.
Solution Approach 2:
The patent changes the chemical composition by specifying chlorine content in chlorinated polyethylene (30-40%) and limiting overall halogen content while incorporating halogen-free flame retardants. This parameter optimization achieves UL-94 V-0 flame resistance through non-toxic mechanisms, resolving the contradiction between flame safety and environmental health.
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 high resistance to flames, electric current, and static electricity, protecting data units by preventing damage from sparks, while maintaining mechanical integrity and flexibility, thus ensuring safe operation of data centers.
Implementation Method 1
90 to 120 parts by weight of alumina trihydrate (Al2O3•3H2O)
Implementation Method 2
5 to 20 parts by weight of silica; 25 to 50 parts by weight of a kaolinite Al2Si2O5(OH)4
Implementation Method 3
20 to 40 parts by weight of chlorinated paraffins; 15 to 30 parts by weight of antimony trioxide
Data Source
Figure 1
AI summary
Disclosed is a composition for a cooling system hose, the composition containing an elastomer compound (EC) containing a blend of a terpolymer of ethylene, propylene and a diene elastomer (EPDM terpolymer) and a chlorinated polyethylene (CPE); the composition further containing: silica, kaolinite Al2Si2O5(OH)4, chlorinated paraffins, alumina trihydrate (Al2O3•3H2O), antimony trioxide; and zinc borate. Further disclosed is a hose for a cooling system containing the composition.