PMMA

Technische karakteristieken

• Hoog transparant, lichtdoorlatendheid tot 92%
• Weerbestendig en UV-stabiel zonder additieven
• Goede krasbestendigheid (beter dan polycarbonaat)
• Relatief stijf en brosser dan PC
• Goede chemische bestendigheid tegen veel zuren en basen
• Gemakkelijk te verwerken: snijden, lijmen, polijsten
• Laag soortelijk gewicht
• Beperkte slagvastheid, kan breken bij impact

Typische toepassingen

• Glasvervangers, ramen en lichtkoepels
• Reclameborden en displaymateriaal
• Lampen, lenzen en optische toepassingen
• Badkamers en sanitair onderdelen
• Automotive interieuronderdelen
• Meubilair en decoratieve toepassingen
• Beschermkappen en afschermingen

Guideline Datasheet: PMMA (Acrylaat, Plexiglas)

Property	Test method	Unit	Value
General properties
Density	ISO 1183	g/cm³	1.19
Water absorption (normal climate)	-	%	0.5
Flammability	DIN 4102	-	B 2
Specific heat capacity	-	kJ/kg·°C	1.32
Mechanical properties
Tensile strength	DIN 53455	N/mm²	74
Elongation at break	DIN 53455	%	5
Elastic modulus (23 °C)	DIN 53457	N/mm²	3000
Flexural strength	DIN 53452	N/mm²	120
Impact strength (Charpy, 23 °C)	DIN 53453	kJ/m²	10
Shore hardness	-	Shore D	80
Coefficient of friction	-	-	0.54
Electrical properties
Dielectric constant (100 Hz)	DIN 53485	-	3.7
Dissipation factor (100 Hz)	DIN 53483	-	0.06
Volume resistivity	DIN 53482	Ω·cm	10¹⁶
Surface resistivity	DIN 53482	Ω	10¹³
Comparative tracking index	DIN 53480	KC	600
Dielectric strength	DIN 53481	kV/mm	23
Thermal properties
Melting temperature	-	°C	103
Thermal conductivity	DIN 52162	W/m·K	0.19
Coefficient of linear thermal expansion	DIN 53762	mm/m·°C	0.07
Continuous use temperature (unloaded)	-	°C	-30 to 80
Max. short-term use temperature	-	°C	100
Heat deflection temperature	DIN 53461	°C	102
Temperature range
Minimum temperature	-	°C	-30
Maximum temperature	-	°C	+80

Comparison Polycarbonate, Acrylaat and PET-G

Property	Acrylic (PMMA)	PET-G	Polycarbonate (PC)
Transparency / Clarity	Excellent	High	High
Density / Weight	Low	Low	Low
Tensile Strength vs Glass	30x stronger	150x stronger	250x stronger
Weather Resistance	Excellent	Good	Good
Cold Bending	Limited	Medium	Good
Hot Bending	Good	Good	Good
Printability	Good	Good	Good
Fire Rating* (DIN 4102)	B2 (normally flammable)	B1 (hardly flammable)	B1 (hardly flammable)

* Fire rating according to DIN 4102 (German fire safety standard):

Class	Description
A1	100% non-combustible
A2	98% non-combustible
B1	Hardly flammable
B2	Normally flammable
B3	Easily flammable