GEHR PMMA XT® (ACRYL)

Chemical Family: Methacrylates

GEHR PMMA XT® (ACRYL) is amorphous material belongs to the polymer group of standard plastics, due to its thermal and mechanical properties. In addition to its high mechanical strength and rigidity, it certainly has an extraordinarily brilliant transparency. Its weather and UV resistance as well as its surface hardness are also very high. PMMA is also scratch-resistant and polishable. The continuous operating temperature ranges between -40 °C and +70 °C. The chemical resistance to most solvents, the resistance to stress cracking as well as the toughness is clearly subordinate compared to other materials from the group of standard polymers.

Properties

Physical Form: Bars, Custom, Rods, Tube
Bars
Custom
Rods
Tube

Other characteristics

Brand: GEHR PMMA XT
Color: Transparent
Density: 1150.0 - 1200.0 kg/m³
Features: Amorphous, Chemical Resistant, Easy To Paint, Excellent Mechanical Strength, Excellent Surface Hardness, Excellent Transparency Properties, Good Mechanical Properties, Good Scratch Resistance, Good Thermal Stability, Good UV Resistance, Good Weather Stability, High Hardness, High Rigidity, High Temperature Insulation Properties, Low Water Absorption
Polymer Name: Polymethyl Methacrylate (PMMA)
Odor: Odorless
Markets: Agriculture & Feed
Automotive & Transportation
Building & Construction
Consumer Goods
Electrical & Electronics
Food & Nutrition
Industrial
Storage: The products shall be stored indoor to keep away from ionizing radiation, chemicals, …
Machining: The product can be machined with standard machinery and tools. Before machining the product should be stored at room temperature 24 h. Evacuate swarf to prevent slipping or tripping. Observe the maximum allowable concentration of dust levels on the working area which apply in your country. Wear safety goggles during machining.
Properties: Very high mechanical strength and hardness
High mechanical rigidity
Excellent transparency
Easy to polish
Good thermal stability
Good insulation properties
Low water absorption
Excellent weather resistance
Flame Rating: UL 94 HB
Insoluble In: Water
Technology: Plastics
Safety Measures: The general industrial safety measures should be considered. A thermal damage during machining should be avoided.
Product Families: Plastics — Parts, Shapes & Films
Form and Condition: Rods. Profiles. Tubes / Solid

Technical data

Table 1 of 6

5 rows

Characteristic	Value	Unit	Method
Tensile Strength at Yield	72	MPa	ISO 527
Elongation at Break (R)	8	%	ISO 527
Impact Strength (an)	20	kJ/m2	ISO 179
Hardness	90	Shore D	ISO 868
Modulus of elasticity (Et)	3215	MPa	ISO 527

Table 2 of 6

4 rows

Characteristic	Value	Unit	Method
Specific Gravity	1.19	—	ISO 1183
Water Absorption	2.1	%	ISO 62
Humidity Absorption	0.4	%	ISO 62
Maximum Permissible Service Temperature	70	°C	UL746B

Table 3 of 6

7 rows

Characteristic	Value	Unit	Method
Vicat Softening Point (VST/B/50)	103	°C	ISO 306
Heat Deflection Temperature (HDT/B)	100	°C	ISO 75
Heat Deflection Temperature (HDT/A)	95	°C	ISO 75
Coefficient of Linear Thermal Expansion	0.8	K-1.10-4	ISO 11359
Thermal Conductivity (20°C)	0.19	W/(m.K)	ISO 22007-4
Glass Transition Temperature (Tg)	106	°C	ISO 3146
Melting Temperature (Tm)	106	°C	ISO 3146

Table 4 of 6