Study On The Use Of Antimicrobial Agent And Antimicrobial PE Film

Packing material is usually used to packing thing directly.Packing nourishments such as cooked food and candy etc.can cause the packing material being polluted by microorganism easily.Moreover in the warehouse things usually were heaped up together,the air circulates badly,the environment degree of humidity is big,it can also cause packing material being infected by microorganism easily.Therefore anti-virus plastics being used for packing the nourishments,such as:food,candy and vegetable etc.is very fitable.Nano-ZnOand nano-SiO₂ have good function with anti-virus,anti-mildewed, anti-deodorization etc.They are currently being studed by more and more peopre. They have various functions:super and strong anti-various effects,heat resisting,high safety coefficient,high service quality.In the meantime they have function to defend mildewed,deodorization,super getting close to surface water effect etc.In this paper,we chose two antimicrobial agents:ZnO antimicrobial agent,SiO₂(SYJ-W-SiO₂) composite antimicrobial agent.The SYJ-W-SiO₂ composite antimicrobial agent powder was self-prepared by optimization technology.The experiment studied on the antimicrobial activity of the two antimicrobial agents,and we applied them to the polymer film to prepare antimicrobial plastic films.Compared with other plasticses,PE have abundant raw material source,a craft synthesize,the price is low and process is simple etc.It is applied very extensively.Fill PE with the nano-ZnO or nano-SiO₂,anti-virus function of the compound material can be made,It can be used extensively has much market foreground.Making use of this characteristics,in this text the author fill the nano-powder into the LLDPE film, make some works as follows:1.In nano-powder Scattering aspect,I do some reaserch:discuss severalfactor, which can cause the scattering influence,find out a suitable dispersion method, Basically,nano-powder is dispersed into polymer with a average of nano class.2.Fill the LDPE film with nan-ZnO and self-made SYJ-W-SiO₂ respectively then carry on the test of the function of compound material.The results showed that, PE antimicrobial plastics showed high rate of properties to prices by adding 1% antimicrobial agents,and had excellent and long-acting antibacterial activities.Their antibacterial rates were all above 92%against Escherichia.Coli and Staphylococcus. Aureus,also the antibacterial effect against Escherichia.Coli was better than that of Staphylococcus.Aureus.3.With a dispersion of nano-class,I carry on a research to the factor that influence the thin film mechanics function and optical function,combined with the tiny view structure of the material and the relation of the macroscopic function, conclude the reasonable ratio and craft condition.The results showed that,the force function of PE antimicrobial plastic films had a little increasing by adding 1% antimicrobial agents,and PE crystal had been thinned.4.We chose two methods to prepare antimicrobial masterbatches:mediate -single screw extrusive method and twin screw extrusive method.The results showed that the best way was adopted mediate-single screw extrusive method to prepare antimicrobial masterbatches,then applied the antimicrobial masterbatches to polyethylene to prepare antimicrobial plastic films.The antimicrobial plastics had the best antimicrobial effect by this way.The method of preparing antibacterial plastic by adding antibacterial masterbatches could bring antimicrobial agent concentrated and symmetrical to the surface of matrix resin,and the mechanical property of matrix resin was not affected.