PMMA Material Plastic Part

PMMA

Material Type

Plastic

Material Full Name

Polymethyl methacrylate

Process Compatibility

Injection Molding, CNC Machining

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PMMA Description

Price

$$$$$

Strength

Relatively low scratch resistance, limited chemical resistance, poor impact resistance.

Weakness

Poor resistance to acids and bases, limited resistance to high temperatures, and challenges in achieving high-quality surface finishes.

Common Application

Headlight lenses, windows, illuminated signs, electronic screens, dental materials

PMMA Properties

PMMA, commonly known as acrylic, is a transparent and rigid thermoplastic derived from the monomer methyl methacrylate. It exhibits high resistance to UV light and weathering, making it ideal for various applications, including car windows, smartphone screens, and aquariums. PMMA is valued for its toughness, ease of shaping, and cost-effectiveness compared to glass. It serves as an excellent alternative to polycarbonate, offering desirable properties such as tensile strength, flexural strength, and transparency at a lower cost.

Properties at a Glance

*Pease note: The following material properties are for reference only. Actual values may vary depending on the selected material brand.
Property Metric English
Density 1.17-1.2 g/cm³ 73.01-74.89 lb/ft³
Shore Hardness D 90-99 90-99
Transparency 80-93% 80-93%
Max Temp. Air 70~90 °C 158~194 °F
Flammabilitiy, UL94 HB HB
Elongation at Break 2-10% 2-10%

Chemical Properties

  • Resistant to most alkalis and acids.
  • Exhibits good resistance to many organic solvents.
  • Susceptible to attack by some polar solvents such as acetone and chloroform.

How Additives Improve PTFE Properties

By incorporating suitable additives into PMMA formulations, its properties can be tailored to meet the requirement of various applications, some of the common additives including:

  • Plasticizers increase the flexibility and impact resistance of PMMA, making it less brittle.
  • Silica or glass microspheres can be added to PMMA to enhance its mechanical properties, such as strength, stiffness, and dimensional stability.
  • UV stabilizers enhance the weatherability of PMMA by protecting it from degradation.
  • Colorants are added to PMMA formulations to achieve specific aesthetic requirements.
  • Flame retardants increase the fire resistance of PMMA.

However, the addition of additives to PMMA formulations can sometimes compromise certain properties of PMMA. While plasticizers can increase flexibility and impact resistance, they many also reduce the tensile strength and stiffness of PMMA. UV stabilizers and colorants may affect the optical clarity of PMMA. Therefore, careful consideration is necessary when selecting and incorporating additives to ensure that any changes do not significantly compromise the overall performance of PMMA.

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FAQs of PTFE Materials

View our FAQ center for more questions.
Polymethyl methacrylate is highly biocompatible. Recycled Acrylic can be formed into sheets. They are used in:
  • The construction of windows and doors,
  • The medical sector,
  • The advertising industry, and more.
Acrylic, a BPA-free alternative to PC, is non-toxic in its solid state and naturally compatible with human tissue. In the past, it was commonly used for contact lenses and is now utilized for dental implants and bone replacements.
PMMA is transparent, rigid, and less impact-resistant compared to PC. PC, on the other hand, is stronger, more impact-resistant, and has higher temperature resistance than PMMA.

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