■ What's Plastic?＞Familiar Plastic Goods
Familiar Plastic Goods
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There are lots of things called "plastic" around us, what on earth is "plastic"? |
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| It originally comes from a Greek word "Plastikos", which means to build an image with soft materials, such as clay. |
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| I think "plastic" originally has a meaning of property of material. |
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| From now on, you're going to learn more about plastic! |
What is another name of plastic?
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| Sae, do you know "plastic" has another name? |
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Oh? I don't know. Does it really have another one? |
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| Yes, it seems to have one. But I don't know･･･. |
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| You don't know that?! The "plastic" is also called "synthetic resin". |
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| It's just like you to know it! |
Types of plastic
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| Do you know you can classify plastic into two types according to its property? |
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I don't know. How about you, Mr. Tic? |
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| Of course, yes! Are those "Thermoplastic resin" and "Thermosetting resin", Mr. Usukawa? |
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| That's right! You know really well. |
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| I'd like to know more about them. |
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| We make use of one of the characteristics of plastic. It changes its shape if some power is added. It’s called reversibility of thermoplastic resin. The same phenomenon happens to clay. |
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And we also make use of a characteristic of thermosetting resin. It’ll get hard you heat it. |
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| I see. |
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| These days, plastic called "elastomer" is generally used. It has elasticity like rubber. |
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| I didn't know that. |
