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How to make plastic products
This page will summarize various questions in plastic molding!
There is a lot of plastic around us, but we use it without really knowing what it is.
Plastic was first introduced to the world in the late 19th century. At that time, the material was called celluloid, but it had the disadvantage of being highly flammable.
☜ Celluloid dolls
Time has passed since then, and it was about 100 years ago that plastics with thermoplastic properties, which we use all around us, were born.
? Thermoplastic? What is that?
Thermoplasticity is a property that softens when heated and hardens when cooled. This property can be described as being just like that of chocolate.
Chocolate...so you need some kind of mold to make it, right?
Yes, it is! In the case of plastic, it takes a tremendous amount of force to mold it, so most molds are made of metal. They are also called "molds" in the molding industry!
Speaking of which... what is plastic made of in the first place?
The main raw material for plastics is petroleum (crude oil), which is heated and broken down into gasoline, kerosene, naphtha, light oil, etc. Plastics are made by further heating and breaking down naphtha.
So gasoline, plastic, and kerosene are actually the same raw material! Surprising! Finally, what are the advantages and disadvantages of plastic?
The advantages of plastic are that it is lightweight, does not rust, and is easy to shape. Conversely, its disadvantages are that it is weak against heat, soft (compared to metal), and electrically charged. On the other hand, plastic is weak against heat, soft (compared to metal), and electrically charged, etc. Although plastic is very light compared to metal, its strength is also low.
This strength design is the key to manufacturing with plastics! I think I understand a little more about plastics now! Thank you very much!