Everything You Need to Know About Acrylic and Its Uses - Xometry

As far as the list of versatile plastics goes, it wouldn’t be complete without mentioning acrylic. It gets worked into vastly different uses, from canopies for aircraft to supplies for manicures. Grouped into a category called engineering plastics, acrylic has proven its worth for several reasons. Here’s what you should know about its composition, properties, how it’s made, and what it can be made into.

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What Is Acrylic? 

Acrylic is the shortened name for polymethyl methacrylate (PMMA), which is a type of rigid plastic with a great level of transparency—so impressive it’s often used in place of glass. It also happens to be the number-one plastic for laser cutting. 

You may see both PMMA and MMA out in the world, and they are related. PMMA is a polymerized version of MMA, which is methyl methacrylate and is a vital part of creating acrylic polymers.

How It’s Made

This synthetic resin is made through polymerization and it’s a breeze to mold it into numerous shapes. The process starts with filling methyl methacrylate into a mold with a catalyst. This causes its structure to form (into long polymer chains) and once this process is finished, the acrylic will be extruded or cast and go through post-processing. 

Properties and Features

There are a few key features that make acrylic stand out from other types of plastic, which we’ve put in the table below:

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Types of Acrylic

There are two common types of acrylic that you’ll come across when looking for manufacturing materials. Their differences come down to how they’re made, which in turn gives them different characteristics. 

• Cast Acrylic: This style comes to life by pouring liquid MMA and PMMA pellets into a vat, and that liquid is then transferred to a mold made of glass sheets. This gets heated up and the acrylic goes through polymerization. Then it cools and you have cast acrylic. It’s known for being a little more expensive, but it’s strong, durable, clear, stable, and has great thermal properties. 
• Extruded Acrylic: This other type of acrylic gets created through extrusion. First pellets will be turned into resin, then this will be poured into an extruder that will melt it down and push or extrude the material out where it will cool. This is a more affordable process, and it’s great as a glass substitution because it’s consistent and easy to machine. Although its strength is lower, this actually makes it easier to shape. 

Outside of these two types, there are many other grades, colors, and formats of acrylic. Some have special coatings to help them resist fogging, flare, and scratches. Others come in paint form, which can be rolled onto walls, products, and even fingernails and cured with UV light. 

Uses and Applications

Acrylic can be used in so many different ways across a vast range of industries. Here are some of the most common applications you’ll find:

• Lights for cars, trucks, and other automotives
• Lenses for eyeglasses
• Signs and displays
• Skylights and windows
• DIY projects
• LCD screens
• Bathtubs, furniture, storage containers, and other home goods
• Acrylic for manicures 
• Bulletproof security barriers
• Coatings that remain stable in various conditions 
• Medical and dental applications, like hip joint replacements, bone cement, and intraocular lenses
• As an alternative to glass and polycarbonate 

FAQs About Acrylic

Here are a few other handy answers to common questions that come up about acrylic.

Disclaimer

The content appearing on this webpage is for informational purposes only. Xometry makes no representation or warranty of any kind, be it expressed or implied, as to the accuracy, completeness, or validity of the information. Any performance parameters, geometric tolerances, specific design features, quality and types of materials, or processes should not be inferred to represent what will be delivered by third-party suppliers or manufacturers through Xometry’s network. Buyers seeking quotes for parts are responsible for defining the specific requirements for those parts. Please refer to our terms and conditions for more information.

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