Properties and application of polymers and composites materials in manufacturin of agricultural techniques parts

Od davnina su se materijali kao što su kamen i drvo koristili u poljoprivredi, te su se od njih izraĎivali razni dijelovi poljoprivredne tehnike koji su čovjeku kroz prošlost pomagali u obavljanju poslova. Poljoprivredna tehnika je izraĎena od raznih materijala, ali u današnje vrijeme posebno se ističu polimerni i kompozitni materijali. Polimerni materijali se tako danas pronalaze u izradi raznih dijelova poljoprivredne tehnike kao što su spremnici, ručice, sjedala, krovovi, brtve i razni drugi dijelovi poljoprivredne tehnike. Zbog svojih dobrih svojstava i praktičnosti, polimeri su nezamjenjivi dio poljoprivredne tehnike. Unatoč rasprostranjenosti polimernih materijala, u izradi poljoprivredne tehnike javljaju se novi materijali, puno boljih svojstava, a to su kompoziti. Kako bi se što bolje upoznali s kompozitnim materijalima i njihovoj ulozi u poljoprivredi, potrebno je shvatiti što su kompoziti, koja je njihova važnost, kakva su njihova svojstva, te ono najvažnije, a to je izvedba u radu. Kompoziti se tako danas koriste pri izradi ležajeva, provodnika za sjeme, grana traktorskih prskalica, spremnika za gorivo i sl. Polimerni i kompozitni materijali dobivaju se, obraĎuju i spajaju raznim tehnologijama obrade i spajanja materijala, kao što je: tokarenje, piljenje, bušenje, laserska obrada, zavarivanje.Since ancient times, materials such as stone and wood have been used in agriculture, and various parts of agricultural technology has been made from them, which has helped man through his past to perform his jobs. Agricultural technology is made out of various materials, but nowadays polymer and composite materials are especially emphasized. Polymeric materials can be nowadays found in the production of various parts of agricultural machinery such as tanks, handles, seats, roofs, seals and various other parts of agricultural machinery. Due to their good properties and practicality, polymers are an indispensable part of agricultural technology. Despite the prevalence of polymeric materials, new materials with much better properties, namely composites, are emerging in agricultural engineering. In order to become more familiar with composite materials and their role in agriculture, it is necessary to understand what composites are, what is their importance, what are their properties, and what is the most important thing and that is their performance at work. Composites are now used in the manufacture of bearings, seed conductors, tractor sprayer branches, fuel tanks, etc. Polymeric and composite materials are obtained and processed by various types of material processing, such as: turning, sawing, drilling, laser processing and welding