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Thermoplastics are used in injection molding and they are the best suited material for injection molds because of their ability to melt and solidify back into compact shape.

Thermoplastics melt when subjected to heat allowing for plastic injection molding. Because of the versatility of thermoplastics, the majority of plastic products used today are made from them. Some thermoplastics are extremely strong and hard, whilst others are flexible and rubber-like. Some appear to be transparent while others are opaque. The versatility of thermoplastics is what makes them so enticing to producers.

About a century ago, the very first injection molding press was developed. The device was simple but effective, and it resulted in an industry that would permanently alter the manufacturing process. When compared to alternative manufacturing methods, injection molding can sometimes be less expensive while maintaining a wide range of sophisticated material qualities.