Conductive NBR Textile Roller Rubber for Static Dissipation
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Solution Overview
Problem
Textile rollers using nitrile butadiene rubber (NBR) experience static electricity buildup due to friction with special fibers, leading to fiber-winding-around-roller phenomena, as existing solutions fail to effectively export static electricity.
Innovation Solution
A rubber composition for textile rollers is developed using carboxylated nitrile butadiene rubber with added conductive powder and conductive bands, forming a net-node structure to enhance conductivity and mechanical performance, comprising specific mass ratios of NBR, conductive powder, conductive bands, plasticizer, anti-aging agent, vulcanizing agent, and zinc oxide, and processed through a pre-mixing and vulcanizing method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NBR is used as the main material for textile roller, then excellent oil resistance, high wear resistance, and good aging resistance are achieved, but static electricity cannot be timely exported due to friction with special fibers
Solution Approach 1:
The patent uses composite materials by combining NBR with conductive powder (carbon black or metal powder) and conductive bands (carbon nanotubes or nano silver wires) to create a rubber composition that maintains the excellent wear resistance and aging resistance of NBR while adding electrical conductivity to export static electricity. The conductive components form a net-node structure within the NBR matrix, providing both mechanical integrity and electrical pathways.
Solution Approach 2:
The patent changes the electrical parameter of the NBR by incorporating conductive additives. Specifically, it adjusts the conductivity parameter by controlling the content and distribution of conductive powder (10-40 parts per 100 parts NBR) and conductive bands (0.5-8 parts per 100 parts NBR), transforming the originally insulating NBR into a conductive material that can dissipate static electricity while maintaining its mechanical properties.
2Object-generated harmful factors
If conductive powder and conductive bands are added to NBR to export static electricity, then conductivity is improved, but mechanical performance may deteriorate
Solution Approach 1:
The patent optimizes the concentration parameters of conductive additives to balance conductivity and mechanical performance. It specifies precise ranges: conductive powder at 10-40 parts per 100 parts NBR and conductive bands at 0.5-8 parts per 100 parts NBR. Within these ranges, the material achieves sufficient electrical conductivity while maintaining adequate tensile strength, elongation, and tear resistance. The dual-component conductive system allows synergistic effects where conductive bands provide electrical pathways with minimal mechanical disruption.
Solution Approach 2:
The patent creates a composite material system where conductive bands (carbon nanotubes or nano silver wires) form a three-dimensional network structure that provides electrical conductivity with minimal impact on mechanical properties. The conductive powder fills the spaces between bands, creating a synergistic effect. This composite structure allows the material to achieve both electrical functionality and mechanical integrity, as the bands and powder work together to provide conductivity while the NBR matrix maintains structural strength.
3Ease of manufacture
If conventional mixing method is used, then manufacturing process is simple, but conductive powder and conductive bands cannot form effective net-node structure
Solution Approach 1:
The patent applies preliminary action by pre-mixing the conductive powder with a portion of the NBR before combining with conductive bands in the final mixing stage. This preliminary dispersion of conductive powder in the rubber matrix prevents agglomeration and ensures uniform distribution. When conductive bands are subsequently added, they can effectively connect with the pre-dispersed powder to form the desired net-node conductive structure, achieving reliable conductivity without overly complicating the manufacturing process.
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 effectively exports static electricity and maintains high mechanical performance, suitable for spinning machines, with improved conductivity and wear resistance, ensuring uniform fiber output.
Implementation Method 1
added with conductive powder and conductive bands; via a pre-mixing process flow, the conductive powder and the conductive bands form a net-node structure in the NBR
Data Source
Figure 1~3
AI summary
Provided is a rubber for a textile roller and a preparation method therefor. The main material of the rubber for a textile roller is a nitrile butadiene rubber, added with conductive powder and conductive bands to form a net-node structure in the nitrile butadiene rubber by means of a mixing process, so that the rubber for a textile roller has a high electric conductivity, can timely export static electricity, and has good mechanical performance suitable for a textile roller, applicable in components of a spinning frame, a roving frame, a drawing frame and other textile machines.