2.4 importance of plastics. Polyethylene is a synthetic material known to man for over 130 years, individual use, instead of metal. Wood or other natural materials, such as fiber for textile production, casting is a boat or automotive parts and packaging material, containers, including many current equipment, plastics play a role in everyday life. We will see it in the form of plastic products range from early morning until the whole bed to sleep during the night shift, starting with the brush, comb, soap box, bottle, Cup, as well as home furnishings and medical equipment prosthetic parts, whether or not to go anywhere where it is always plastic.2.5 electrical wiring. A device that uses electric energy from one place to another place the electric flow was mostly into electric power, through the power line to the sky. The power cable is made with a substance that allows electric current through. Called conductivity and apply electric power is a metal that allows electric current through. Reduce each type of conductors let electricity pass through different. Conductive through as much. There's much conductive called to let electricity flow through a little.2.6 the meaning of lead.As an important raw material in the battery industry. The industry, which is a solder alloy Tin with lead solder in different ratios used in the electronics industry. Electrical appliances, car radiator components and circuit boards It also takes the lead in metal plating with zinc coated steel plant. Balls, balls, nets and purveyor of the fishing industry. Used in paper making lead pipe Lead sheets The typeface Ammo electric bridge Make a wall or radiation laboratory about the reactor. The use of lead in paint and powder coated red, yellow for the lead the lead containers.
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