Polypropylene Resin Composition Flame Retardancy
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Solution Overview
Problem
Olefin-based resins used in cables face challenges in achieving sufficient flame retardancy while maintaining insulation performance and processability, particularly when using halogen-free flame retardants, as they require excessive amounts, affecting the cable's appearance and properties.
Innovation Solution
A polypropylene resin composition comprising 25-35% polypropylene polymer, 15-25% styrene block copolymer, 15-25% poly(arylene ether) resin, 26-35% phosphorus flame retardant, and 0-10% processing additive, which balances flame resistance, insulation, and processability without excessive flame retardant usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal hydroxide-based flame retardant is introduced to achieve flame retardancy, then flame resistance is improved, but the amount required (70% or more) deteriorates cable appearance and maintains fundamental problems of olefin-based resin
Solution Approach 1:
The patent uses a composite resin system combining polypropylene, poly(arylene ether), and styrene block copolymer that works synergistically with phosphorus flame retardant. This composite approach allows achieving flame retardancy with only 20-40 wt% flame retardant content, resolving the contradiction between flame resistance and excessive flame retardant quantity.
Solution Approach 2:
The patent changes the chemical composition parameters of the resin system by introducing poly(arylene ether) and styrene block copolymer in specific ratios (10-40 wt% and 5-30 wt% respectively). These parameter changes enable the system to achieve adequate flame resistance at reduced flame retardant levels, solving the contradiction between flame safety and material composition balance.
2Object-affected harmful factors
If halogen-free flame retardant is introduced to achieve eco-friendly flame retardancy, then environmental compatibility is improved, but the amount required deteriorates cable appearance and properties
Solution Approach 1:
The patent employs a composite resin formulation with polypropylene, poly(arylene ether), and styrene block copolymer that enhances flame retardant efficiency. This composite system allows using eco-friendly phosphorus-based flame retardants at reduced levels (20-40 wt%), simultaneously achieving environmental compatibility and avoiding appearance degradation.
Solution Approach 2:
The patent modifies the resin composition parameters by incorporating specific amounts of poly(arylene ether) (10-40 wt%) and styrene block copolymer (5-30 wt%), which synergistically enhance the efficiency of halogen-free phosphorus flame retardants. This parameter optimization enables achieving adequate flame protection with reduced flame retardant content, maintaining both eco-friendliness and material properties.
Data Source
AI summary
The present invention relates to a polypropylene resin composition and a cable cladded with the same. More particularly, the present invention relates to a polypropylene resin composition, including 25 to 35% by weight of a polypropylene polymer, 15 to 25% by weight of a styrene block copolymer, 15 to 25% by weight of a poly(arylene ether) resin, 26 to 35% by weight of a phosphorus flame retardant, and 0 to 10% by weight of a processing additive.In accordance with the present invention, a polypropylene resin composition including a small amount of flame retardant but exhibiting excellent flame resistance, insulation performance, processability, and property balance, and a cable cladded with the same are provided.