At the first attempts in the plastics, Material properties obtained with test procedures applied for metals and design rules were used. Because there are very large differences between metals and plastics, this condition may lead to low quality though.
In addition to production ease, lightness and economic, aesthetic and being coloured properties are the biggest advantages. So the appropriate method selection and optimum desing method needs to happen in order that plastic materials perform the desired function in today’s highly competitive environment.
Today's plastics is a very important position in industry. Now plastics, for packaging of foods, are successfully used in almost every field up to transportation.
You must be careful at geometric design of the parts. You must follow the rules about scaling of parts like holes, ribs, teeth so that there would never be such problems as electrocution, spaces.
During design, Knowing about the basic information about chemical and physical properties of plastics will be also useful. Thus, the most available material helping that the part was successfully able to perform the desired function can be chosen.