Non-halogen Multilayer Insulating Wire Flame Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-halogen insulating wires using metal hydroxides face challenges in maintaining mechanical and electrical insulation characteristics while providing excellent flame resistance, as high filler content can degrade these properties.
Innovation Solution
A non-halogen multilayer insulating wire design featuring a conductor covered by an insulating inner layer made of a first non-halogen resin composition containing metal hydroxide and polyolefin, and an insulating outer layer made of a second non-halogen resin composition with polyester resin and/or polyester elastomer, optimized with specific metal hydroxide content and aromatic structure, achieving balanced flame resistance, mechanical, and electrical insulation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal hydroxide is highly filled to achieve flame resistance, then flame resistance is improved, but mechanical characteristics and electrical insulation characteristics are degraded
Solution Approach 1:
The insulating layer is divided into two distinct layers: an insulating inner layer (first resin composition) and an insulating outer layer (second resin composition). The inner layer contains metal hydroxide at 20-100 parts by mass per 100 parts by mass of base polymer (A) to provide flame resistance, while the outer layer contains metal hydroxide at 5-50 parts by mass per 100 parts by mass of base polymer (B) to maintain mechanical and electrical properties. This segmentation allows each layer to be optimized for its specific function.
Solution Approach 2:
Different regions of the insulating layer are assigned different material compositions and metal hydroxide concentrations. The insulating inner layer has higher metal hydroxide content (20-100 parts by mass per 100 parts by mass of base polymer) for maximum flame resistance, while the insulating outer layer has lower metal hydroxide content (5-50 parts by mass per 100 parts by mass of base polymer) to preserve mechanical strength and electrical insulation characteristics.
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 provides a non-halogen insulating wire with enhanced flame resistance, mechanical wear resistance, and electrical insulation characteristics, while avoiding environmental concerns associated with halogen and phosphorus-based flame retardants.
Implementation Method 1
a first non-halogen resin composition containing a metal hydroxide and a base polymer (A) including polyolefin... a second non-halogen resin composition containing a metal hydroxide and a base polymer (B) including a polyester resin and/or polyester elastomer resin
Data Source
Figure 1
AI summary
A non-halogen insulating wire with excellent flame resistance as well as high mechanical characteristics (wear resistance) and electrical insulation characteristics is provided. A non-halogen two-layer insulating wire includes: a conductor; and an insulating layer having an insulating inner layer which covers an outer circumference of the conductor and an insulating outer layer which covers an outer circumference of the insulating inner layer. The insulating inner layer is made of a first non-halogen resin composition which contains metal hydroxide and a base polymer (A) including polyolefin, and has a thickness of 20% to 58% of an entire thickness of the insulating layer. The insulating outer layer is made of a second non-halogen resin composition which contains metal hydroxide and a base polymer (B) including polyester resin and/or polyester elastomer resin.