Transmission belt
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Solution Overview
Problem
Power transmission belts face challenges in achieving optimal wear resistance and temperature management, with existing rubber compositions often resulting in excessive heat generation and wear during dynamic use.
Innovation Solution
A rubber composition incorporating cellulose nanofibers and carbon black, where the cellulose nanofibers are added in amounts from 0.1 to 20 parts by mass and carbon black from 5 to 80 parts by mass relative to 100 parts of the rubber component, is used to improve wear resistance and reduce temperature increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber compositions are used in power transmission belts, then the belts can transmit power effectively, but the wear resistance is insufficient and temperature increase occurs during dynamic use
Solution Approach 1:
The patent applies composite materials by combining rubber components with cellulose nanofibers and carbon black in specific proportions. The cellulose nanofibers (0.1-20 parts by mass per 100 parts rubber) provide reinforcement and wear resistance, while carbon black (5-80 parts by mass per 100 parts rubber) contributes to heat dissipation and structural stability. This composite formulation resolves the contradiction by integrating multiple materials with complementary functions to simultaneously improve wear resistance and control temperature increase.
Solution Approach 2:
The patent employs parameter changes by optimizing the concentrations of cellulose nanofibers and carbon black within specific ranges. By adjusting the amount of cellulose nanofibers (0.1-20 parts by mass) and carbon black (5-80 parts by mass), the composition achieves optimal balance between wear resistance and temperature management. This systematic parameter optimization allows the rubber composition to perform reliably under dynamic loading conditions.
2Duration of action of stationary object
If carbon black is added to improve wear resistance, then the belt durability increases, but the composition complexity and manufacturing difficulty increase
Solution Approach 1:
The patent establishes specific parameter ranges for carbon black (5-80 parts by mass per 100 parts rubber) and cellulose nanofibers (0.1-20 parts by mass per 100 parts rubber) to optimize both durability and manufacturability. These defined ranges provide clear manufacturing guidelines, making it easier to control the composition formulation while achieving the desired belt durability through proven effective concentrations.
Data Source
AI summary
A power transmission belt is at least partially formed of a rubber composition. The rubber composition contains a rubber component, cellulose nanofibers, and carbon black. The amount of the cellulose nanofibers to be added is from 0.1 parts by mass to 20 parts by mass, relative to 100 parts by mass of the rubber component. The amount of the carbon black to be added is from 5 parts by mass to 80 parts by mass, relative to 100 parts by mass of the rubber component. The sum of the amount of the carbon black to be added and three times the amount of the cellulose nanofibers to be added is from 15 to 90.