Plastics are a staple in our world today, but where do they come from?  As a leader in custom plastic injection molds in MissouriLeVic Plastics has nearly 50 years of engineering experience.  So, we know exactly what makes up quality plastic products.  This article will cover the fine details when it comes to the core of plastic products. 

What is plastic made of?

Plastics are human-made, synthetic polymers that consist of long carbon chains, and some other elements.  A process known as “cracking” is when crude oil and gases are converted to monomers such as ethylene, propylene, and others.  These are then mixed with other chemicals to make the desired product.   

Items that can be added to make different layers of plastic are:

  • Phthalates – make PVC soft 
  • Butadiene – make plastic tougher 
  • Additional additives – bacteria, heat, light, color, and friction 


When it comes time to shape the plastic to the desired size for custom plastic injection molds in Missouri, the materials are cast, spun, fabricated, molded, extruded, or applied on another material as a layer of coating. 

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There are two distinct categories of plastics based on their chemical composition: Polymers and Heterochain Polymers.  


Polymers are a type of plastic that only has carbon atoms in their backbone chains.  They are used for many commodity plastics.  

Heterochain Polymers 

The second category of plastics is heterochain polymers.  These contain atoms such as nitrogen, oxygen, and sulfur in their backbone chains.  They also contain carbon.  Many engineering plastics are made up of heterochain polymers.  One example would be polycarbonate.   

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LeVic Plastics’ Promise to You 

Our mission at LeVic Plastics is to supply our customers with quality parts on time and at a fair price.  Our practices and methods are designed to provide the most overall satisfaction to every one of our customers.  We handle orders of all sizes, so limited production runs in Missouri are the least of your worries. 

Our customer–oriented quality and service has been our entire focus at LeVic Plastics since day one.  We take pride in our company’s great history and use those original values, plus some modern touches, to be successful with our business today.  

With years of experience, LeVic Plastics has had time to perfect our strategies and become an industry leader in custom injection molding in Missouri.  We also offer CNC Machining in Missouri, as well as overmolding services in Missouri. Since 1971, we have continually strived to offer the most precise, workable, and economical prototype research and production facilities available.