This paper studied the influence of different modification methods of hemp fiber on the strengthening effect of natural rubber. By using hemp fiber to reduce the carbon black content in the system

the heat generation of hemp fiber reinforced natural rubber composite (HF/CB/NR) was reduced while the mechanical properties of rubber material were guaranteed. The results showed that the three parts of carbon black could be reduced by adding one part of alkali treatment to hemp fiber

and the mechanical properties of the two materials are equivalent. Through the compression heat generation test

it was found that HF/CB/NR heat generation was significantly reduced by 5.6% after adding hemp fiber treated with alkali treatment and coating with natural rubber latex. The addition of hemp fiber can significantly reduce Payne effect

so that the material can maintain a higher stiffness under higher strain