Research And Development Of Glass-fiber Reinforced Polyoxymethylene

Polyoxymethylene(POM) is a kind of thermoplastic engineering plastics with high crystallinity and high melting point.The engineering plastics can have high strength,good rigidity,strong impact resistance,fatigue resistance,wear resistance,low creep properties with excellent physical and mechanical properties,which is able to compared with the metal material.However,there are still some drawbacks,such as low impact toughness,high notch sensitivity,poor thermal stability,high friction coefficient and so on,which severely limits its practical application in various fields.In the current study we aimed to achieve improved impact strength and tensile strength of POM.By comparing the physical properties of POM with different formula and experimental conditions,the optimal formula design and production conditions can be found.The effect of four factors,including POM raw material,glass fiber,coupling agent and production equipment,on the physical properties of the product was investigated.The experimental results showed that:(1)The medium liquidity of polyformaldehyde raw material in company A can improve the physical properties of glass-fiber-polyformaldehyde to reach the expected goal.Especially,the significant improvement of the liquidity of glass-fiber-polyformaldehyde makes its physical properties and liquidity to be accordant.(2)The performance of chopped glass fiber is better than long fiber.(3)Model CG0817 is the best coupling agent in all respects.(4)Short glass fiber reinforced POM product that A company produced with the improved formula has made a breakthrough in large size and high strength gear field,which the performance has been recognized by customers and has provided customers with the products stably so far.