Introduction

PMMA (acrylic) is a transparent thermoplastic and one of the world's most widely used plastics thanks to its processability and ease of coloration. Acrylic is also chemically stable with good mechanical properties and resistance to the elements.

Applications: Lenses, light shades, light pipes, optical fibers, signage.

Behavior: Acrylic has poor chemical resistance, and can be brittle and vulnerable to stress cracks. If this poses problems, PC can be substituted in. Extra draft is required during tooling.

PropertiesMetricOther
Density1.01 – 1.20 g/cc0.0365 – 0.0434 lb/in³
Hardness68 – 11368 – 113
Tensile Strength (Yield)13.0 – 65.0 MPa1890 – 9430 psi
Tensile Strength (Ultimate)22.1 – 49.0 MPa3210 – 7110 psi
Elongation at Yield0.62 – 30 %0.62 – 30 %
Elongation at Break3.0 – 150 %3.0 – 150 %
Dielectric Strength18.0 – 50.0 kV/mm457 – 1270 kV/in
Melt Temperature180 – 274 °C356 – 525 °F

Surface Finish

Painting

Painting the surface of a part improves its aesthetic appearance and can provide brand recognition to consumers. In addition, painting can have a protective effect on parts.

Painting Image
Screen Printing

Screen printing is a printing technique where a mesh is used to transfer ink onto a substrate, except in areas made impermeable to the ink by a blocking stencil.

Screen Printing Image

Design Guideline

Wall Thickness

Between 1 mm and 3 mm

Keeping walls as thin and constant as possible will reduce warping and sinking

Thickness gradient

Wall thickness should increase by no more than three times

Transition between thicknesses can be made smoother with fillets

Internal edges

Rounded, more than half wall thickness

Add fillet with largest possible radius

External edges

Rounded, full wall thickness plus internal fillet

Add fillet with largest possible radius

Draft angle

Increase draft by 1° for every 25 mm (for parts taller than 50 mm)

Add draft to ease ejection and avoid drag marks

Textured finish

Increase draft angle by 1-2°

Increase draft to ease ejection and avoid drag marks

Get Your Parts Into Production Today

Only 4 simple steps to complete your project. Follow the instruction and give it a try!

file upload icon

Upload Files

arrow down
quotation icon

Get Quotation

arrow up
place order icon

Place an Order

arrow down
start production

Start Production

Latest news and stories

Top Reasons to Use Vacuum Casting for Rapid Prototyping.
29 Oct

Top Reasons to Use Vacuum Casting for Rapid Prototyping.

Summary: Should you choose vacuum casting for your prototyping needs? Here is everything you need […]

Now You Can Have Tips for Speeding Up Manufacturing.
27 Oct

Now You Can Have Tips for Speeding Up Manufacturing.

All companies want their parts manufactured as quickly as possible. Speeding up manufacturing means shorter […]

All You Need to Know About CNC Machining Service:
21 Oct

All You Need to Know About CNC Machining Service:

CNC Milling VS CNC Turning. CNC machining service come in different shapes and forms. This […]