Insulated Wire Resin Composition for Low Die Drool and Clean Stripping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing resin compositions for insulated wires face issues with die drool formation, wire stripping difficulties, and contamination due to high adhesion or low adhesion to conductors, as well as abrasion resistance challenges, impacting appearance and productivity.
Innovation Solution
A resin composition combining low density polyethylene, ethylene-vinyl acetate copolymer, and specific amounts of thioether compounds and fluororubber is used to enhance film-forming properties, reducing die drool and contamination while maintaining flame retardancy and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyolefin resin coating is applied to provide heat resistance and chemical inertness, then durability is improved, but adhesion to the base wire and flexibility deteriorate due to electrostatic charging
Solution Approach 1:
The patent applies a composite coating structure consisting of a polyolefin resin layer (providing heat resistance and chemical inertness) combined with a silane-modified polyolefin resin layer or silane coupling agent (improving adhesion and reducing electrostatic charging). This composite material approach allows the wire to simultaneously achieve durability through the polyolefin's protective properties and flexibility through the silane component's ability to reduce electrostatic charging and improve adhesion to the base wire.
2Reliability
If polyolefin resin is used for coating to ensure chemical inertness and heat resistance, then reliability is improved, but adhesion to the base wire deteriorates
Solution Approach 1:
The patent introduces local quality by creating a multi-layer coating structure where the polyolefin resin layer provides chemical inertness and heat resistance, while a separate silane-modified polyolefin resin layer or silane coupling agent layer provides improved adhesion to the base wire. Each layer performs its specific function locally, allowing the coating as a whole to achieve both chemical inertness/heat resistance and strong adhesion simultaneously.
3Ease of operation
If silane-modified polyolefin resin or silane coupling agent is added to improve adhesion and reduce electrostatic charging, then flexibility is improved, but coating uniformity and surface quality deteriorate due to aggregation
Solution Approach 1:
The patent applies preliminary action by performing silane modification on the polyolefin resin before the coating process, or by pre-mixing the silane coupling agent with the polyolefin resin under controlled conditions to ensure uniform distribution. This preliminary preparation prevents aggregation during coating application, allowing the silane component to uniformly reduce electrostatic charging and improve flexibility while maintaining coating uniformity and surface quality.
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 resin composition improves film-forming properties, enhances wire appearance, and ensures excellent flame retardancy and mechanical characteristics, reducing production line contamination and improving productivity.
Implementation Method 1
it has gradually come to light by experimentation that electrostatic charging occurs in a polyolefin resin coating
Data Source
AI summary
A resin composition, including the following components (A) and (B); and at least one kind of the following components (C) and (D): (A) a low density polyethylene resin; (B) an ethylene-vinyl acetate copolymer resin; (C) a thioether compound; and (D) fluororubber, in which: a content of the component (A) is 5 to 40 parts by mass and a content of the component (B) is 60 to 95 parts by mass in 100 parts by mass of a total content of the components (A) and (B), a total content of the components (C) and (D) is 0.05 to 1 part by mass with respect to 100 parts by mass of the total content of the components (A) and (B), and a proportion of a vinyl acetate component in the component (B) is 40 mass% or less.