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This is the free Material Data Center Datasheet of PLEXIGLAS® 7M - PMMA - Röhm GmbH

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Processing/Physical Characteristics - Mechanical properties - Thermal properties - Electrical properties - Optical properties - Other properties - Material specific properties - Test specimen production - Diagrams

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Product Texts

Productprofil:

PLEXIGLAS® 7M molding compound is based on polymethyl methacrylate (PMMA).

 

Besides showing the familiar properties of PLEXIGLAS® 7H molding compounds, such as

 

• excellent light transmission and brilliance
• excellent weatherability
• high mechanical strength, surface hardness and abrasion resistance.

 

PLEXIGLAS® 7M is special in that it

 

• better flowing behavior,
• AMECA listing.

Application:

PLEXIGLAS® 7M is particularly suitable for extruding profiles and panels for use in lighting engineering.

Example:

lighting fixtures, displays and similar extruded items for technical purposes.

Processing:

PLEXIGLAS® 7M can be processed on extruders with 3-zone general purpose screws for thermoplastics.

Physical Form / Packaging:

PLEXIGLAS® molding compound is supplied as pellets of uniform size in two-ply, 25kg polyethylene bags; other packaging on request.

Processing/Physical Characteristics	Value	Unit	Test Standard
ISO Data
Melt volume-flow rate, MVR	2.9	cm³/10min	ISO 1133
Temperature	230	°C	-
Load	3.8	kg	-
Density of melt	1060	kg/m³	-
Thermal conductivity of melt	0.181	W/(m K)	-
Spec. heat capacity of melt	2440	J/(kg K)	-
Eff. thermal diffusivity	6.99E-8	m²/s	-
Ejection temperature	85	°C	-

Mechanical properties	Value	Unit	Test Standard
ISO Data
Tensile Modulus	3200	MPa	ISO 527
Stress at break	69	MPa	ISO 527
Strain at break	4	%	ISO 527
Charpy impact strength, +23°C	20	kJ/m²	ISO 179/1eU

Thermal properties	Value	Unit	Test Standard
ISO Data
Glass transition temperature, 10°C/min	108	°C	ISO 11357-1/-2
Vicat softening temperature, B	104	°C	ISO 306
Coeff. of linear therm. expansion, parallel	80	E-6/K	ISO 11359-1/-2
Burning Behav. at 1.5 mm nom. thickn.	HB	class	IEC 60695-11-10
Thickness tested	1.6	mm	-
Yellow Card available	yes	-	-
Oxygen index	17.2	%	ISO 4589-1/-2

Electrical properties	Value	Unit	Test Standard
ISO Data
Relative permittivity, 100Hz	3.7	-	IEC 62631-2-1
Relative permittivity, 1MHz	2.8	-	IEC 62631-2-1
Dissipation factor, 100Hz	500	E-4	IEC 62631-2-1
Dissipation factor, 1MHz	200	E-4	IEC 62631-2-1
Volume resistivity	>1E13	Ohm*m	IEC 62631-3-1
Surface resistivity	1E13	Ohm	IEC 62631-3-2

Optical properties	Value	Unit	Test Standard
ISO Data
Luminous transmittance	92	%	ISO 13468-1, -2

Other properties	Value	Unit	Test Standard
Water absorption	2	%	Sim. to ISO 62
Humidity absorption	0.6	%	Sim. to ISO 62
Density	1190	kg/m³	ISO 1183

Material specific properties	Value	Unit	Test Standard
ISO Data
Viscosity number	62	cm³/g	ISO 307, 1157, 1628

Test specimen production	Value	Unit	Test Standard
ISO Data
Processing conditions acc. ISO	8257	-	ISO ....-2
Injection Molding, melt temperature	254	°C	ISO 294
Injection Molding, mold temperature	64	°C	ISO 294
Injection Molding, injection velocity	195	mm/s	ISO 294

Diagrams

Characteristics

Processing

Injection Molding, Profile Extrusion, Sheet Extrusion, Other Extrusion

Delivery form

Pellets

Special Characteristics

Light stabilized or stable to light, U.V. stabilized or stable to weather, Transparent

Regional Availability

North America, Europe, Asia Pacific, South and Central America, Near East/Africa

Other text information

Profile extrusion

PREPROCESSING
Predrying temperature: max. 94 °C
Predrying time in a desiccant-type drier: 2 - 3 h
PROCESSING
Melt temperature: 220 - 260 °C
Die temperature: 220 - 260 °C

Sheet extrusion

PREPROCESSING
Predrying temperature: max. 94 °C
Predrying time in a desiccant-type drier: 2 - 3 h
PROCESSING
Melt temperature: 220 - 260 °C
Die temperature: 220 - 260 °C

Chemical Media Resistance

Acids
	Citric Acid solution (10% by mass) (23°C)
	Lactic Acid (10% by mass) (23°C)
	Nitric Acid (40% by mass) (23°C)
	Sulfuric Acid (38% by mass) (23°C)
	Sulfuric Acid (5% by mass) (23°C)
Bases
	Sodium Hydroxide solution (35% by mass) (23°C)
	Sodium Hydroxide solution (1% by mass) (23°C)
	Ammonium Hydroxide solution (10% by mass) (23°C)
Hydrocarbons
	n-Hexane (23°C)
	iso-Octane (23°C)
Standard Fuels
	Standard fuel without alcohol (pref. ISO 1817 Liquid C) (23°C)
	Standard fuel with alcohol (pref. ISO 1817 Liquid 4) (23°C)
	Diesel fuel (pref. ISO 1817 Liquid F) (23°C)
Salt solutions
	Sodium Carbonate solution (20% by mass) (23°C)
	Sodium Carbonate solution (2% by mass) (23°C)
Other
	50% Oleic acid + 50% Olive Oil (23°C)
	Water (23°C)

Disclaimer

Copyright Altair Engineering GmbH. Altair Engineering GmbH assumes no liability for the system to be free of errors. The user takes sole responsibility for the use of this data under the exclusion of every liability from Altair Engineering GmbH; this is especially valid for claims of compensation resulting from consequential damages. Altair explicitly points out that any decision about the application of materials must be double checked with the producer of this material. This includes all contents of this system. Copyright laws are applicable for the content of this system.

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