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This is the free Material Data Center Datasheet of PLEXIGLAS® 7N - 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® 7N is an amorphous thermoplastic molding compound (PMMA).

Typical properties of PLEXIGLAS® molding compounds are:

good flow
high mechanical strength, surface hardness and mar resistance
high light transmission
very good weather resistance
free colorability due to crystal clarity.

Special properties of PLEXIGLAS® 7N molding compound are:

very good mechanical properties
high heat deflection temperature
very good flow / melt viscosity
AMECA listing.

Application:

Used for injection molding optical and technical items.

Example:

optical waveguides, luminaire covers, automotive lighting, instrument cluster covers, optical lenses, displays, etc.

Processing:

PLEXIGLAS® 7N can be processed on injection molding machines with 3-zone general purpose screws for engineering thermoplastics.

Physical Form / Packaging:

PLEXIGLAS® molding compounds are supplied as pellets of uniform size, packaged in 25kg polyethylene bags or in 500kg boxes with PE lining; other packaging on request.

Processing/Physical Characteristics

Value

Unit

Test Standard

ISO Data

Melt volume-flow rate, MVR

cm³/10min

ISO 1133

Temperature

230

°C

Load

3.8

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

°C

Mechanical properties

Value

Unit

Test Standard

ISO Data

Tensile Modulus

3200

MPa

ISO 527

Stress at break

MPa

ISO 527

Strain at break

3.5

ISO 527

Tensile creep modulus, 1h

2800

MPa

ISO 899-1

Tensile creep modulus, 1000h

2200

MPa

ISO 899-1

Charpy impact strength, +23°C

kJ/m²

ISO 179/1eU

Thermal properties

Value

Unit

Test Standard

ISO Data

Glass transition temperature, 10°C/min

110

°C

ISO 11357-1/-2

Temp. of deflection under load, 1.80 MPa

°C

ISO 75-1/-2

Temp. of deflection under load, 0.45 MPa

100

°C

ISO 75-1/-2

Vicat softening temperature, B

103

°C

ISO 306

Coeff. of linear therm. expansion, parallel

E-6/K

ISO 11359-1/-2

Burning Behav. at 1.5 mm nom. thickn.

class

IEC 60695-11-10

Thickness tested

1.6

Yellow Card available

yes

Burning rate, FMVSS, Thickness 1 mm

72.3

mm/min

ISO 3795 (FMVSS 302)

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

Comparative tracking index

600

IEC 60112

Optical properties

Value

Unit

Test Standard

ISO Data

Luminous transmittance

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

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

243

°C

ISO 294

Injection Molding, mold temperature

°C

ISO 294

Injection Molding, injection velocity

195

mm/s

ISO 294

Diagrams

Viscosity-shear rate , PLEXIGLAS® 7N, PMMA, Röhm

Shearstress-shear rate , PLEXIGLAS® 7N, PMMA, Röhm

Dynamic Shear modulus-temperature , PLEXIGLAS® 7N, PMMA, Röhm

Stress-strain , PLEXIGLAS® 7N, PMMA, Röhm

Secant modulus-strain , PLEXIGLAS® 7N, PMMA, Röhm

Stress-strain (isochronous) 23°C, PLEXIGLAS® 7N, PMMA, Röhm

Creep modulus-time 23°C, PLEXIGLAS® 7N, PMMA, Röhm

Creep curve 23°C, PLEXIGLAS® 7N, PMMA, Röhm

Tensile modulus-temperature , PLEXIGLAS® 7N, PMMA, Röhm

Characteristics

Processing

Injection Molding

Delivery form

Pellets

Special Characteristics

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

Features

Amorphous

Applications

Automotive

Regional Availability

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

Other text information

Injection molding

PREPROCESSING
Predrying temperature: max. 93 °C
Predrying time in a desiccant-type drier: 2 - 3 h
PROCESSING
Melt temperature: 220 - 260°C
Mold temperature:60 - 90°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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