High-clarity thermoplastic for transparent plastic components

Acrylic (PMMA), or polymethyl methacrylate, is a widely used transparent thermoplastic commonly known by trade names such as Plexiglass. It is valued for its exceptional optical clarity, transmitting up to 92% of visible light, making it an ideal alternative to glass in applications requiring clear visibility.

At Eck Plastic Arts, acrylic is frequently selected for applications where aesthetics, weather resistance, and lightweight durability are critical, including display components, windows, and protective barriers.

Benefits of Acrylic (PMMA)

Acrylic is widely used due to its strong combination of optical and physical properties, making it suitable for both functional and visual applications.

Key benefits include:

• Excellent optical clarity (up to 92% light transmission)
• Approximately 50% lighter than glass
• 10–17 times more impact-resistant than glass
• Strong UV and weather resistance without yellowing
• Good scratch resistance with the ability to be polished
• Ability to retain clarity while incorporating color

These characteristics make acrylic especially effective in applications where transparency and long-term visual performance are required.

For projects where material performance must align with process requirements, selecting the right resin early is critical.

Common Applications of Acrylic Parts

Acrylic is commonly used across industries where clarity, durability, and visual appeal are essential.

Typical applications include:

• Automotive lenses and lighting components
• Retail signage and display cases
• Protective barriers and covers
• Medical device components
• Aquarium viewing panels
• Skylights and architectural glazing

Its UV resistance and ability to maintain clarity over time make it particularly well-suited for both indoor and outdoor applications.

Depending on part geometry, wall thickness, and production requirements, these components may also be supported by Eck’s broader manufacturing capabilities, including plastic fabrication and injection molding.

Acrylic vs. Other Engineering Plastics

Material selection depends on the specific performance requirements of the application.

Acrylic vs. Polycarbonate

• Acrylic offers higher optical clarity (~92% vs. ~88%)
• Acrylic is more scratch-resistant and can be polished
• Polycarbonate has significantly higher impact resistance (~250x glass vs. 10–17x for acrylic)
• Polycarbonate may yellow over time without UV protection, while acrylic maintains clarity
• Acrylic offers far greater chemical resistivity over Polycarbonate

Acrylic is best suited for applications prioritizing clarity, aesthetics, and UV stability, while polycarbonate is preferred for high-impact or safety-critical applications.

For customers evaluating multiple material options, Eck Plastic Arts can help identify the most economical and technically suitable fit for the application.

Design Guidelines for Acrylic Parts

Proper part design is critical to achieving optimal performance and manufacturability.

Recommended design considerations:

• Maintain uniform wall thickness
• Avoid sharp corners to reduce stress concentration
• Apply adequate draft angles for mold release
• Allow for thermal expansion and contraction in assemblies
• Do not over-tighten fasteners to prevent stress cracking
• Consider annealing to relieve internal stresses after machining or molding

Following these guidelines helps ensure consistent quality, durability, and production efficiency.

If your part requires support beyond material selection, Eck Plastic Arts also provides design-informed manufacturing support across multiple processes, including injection molding and thermoforming.

Material Properties of Acrylic (PMMA)