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This is the free Material Data Center Datasheet of PLEXIGLAS® Heatresist hw55 - PMMA - Röhm GmbH

Material Data Center offers the following functions for PLEXIGLAS® Heatresist hw55:
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Processing/Physical Characteristics - Mechanical properties - Thermal properties - Electrical properties - Optical properties - Other properties - Material specific properties - Test specimen production - Processing Recommendation Injection Molding - Diagrams
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Product Texts

Productprofil:

PLEXIGLAS® Heatresist hw55 clear is a copolymer based on methyl methacrylate (MMA) with comonomer constituents.

 

Besides showing the familiar properties of standard PLEXIGLAS® molding compound, such as

 

  • high light transmission,
  • good flowability,
  • high mechanical strength, surface hardness and abrasion resistance, as well as
  • excellent weatherability,

 

PLEXIGLAS® Heatresist hw55 clear offers the additional benefits of

 

  • increased heat deflection temperature under load and
  • improved resistance to stress cacking
  • optimised inherent color,
  • AMECA listing.

Application:

PLEXIGLAS® Heatresist hw55 clear is particularly suitable for injection molding of technical items.

Example:

lighted keys, luminaire covers, fiber optics.

Processing:

PLEXIGLAS® Heatresist hw55 clear can be processed on injection molding machines with 3-zone general purpose screws for thermoplastics.

Physical Form / Packaging:

PLEXIGLAS® Heatresist hw55 is supplied as pellets of uniform size, packaged in two-ply, 25kg polyethylene bags; other packaging on request.

Processing/Physical CharacteristicsValueUnitTest Standard
ISO Data
Melt volume-flow rate, MVR 1.2 cm³/10min ISO 1133
Temperature 230 °C -
Load 3.8 kg -
Density of melt 1080 kg/m³ -
Thermal conductivity of melt 0.19 W/(m K) -
Spec. heat capacity of melt 2440 J/(kg K) -
Eff. thermal diffusivity 7.22E-8 m²/s -
Ejection temperature 100 °C -
Mechanical propertiesValueUnitTest Standard
ISO Data
Tensile Modulus 3600 MPa ISO 527
Stress at break 80 MPa ISO 527
Strain at break 3.5 % ISO 527
Tensile creep modulus, 1h 3300 MPa ISO 899-1
Tensile creep modulus, 1000h 2700 MPa ISO 899-1
Charpy impact strength, +23°C 20 kJ/m² ISO 179/1eU
Thermal propertiesValueUnitTest Standard
ISO Data
Glass transition temperature, 10°C/min 122 °C ISO 11357-1/-2
Temp. of deflection under load, 1.80 MPa 106 °C ISO 75-1/-2
Temp. of deflection under load, 0.45 MPa 109 °C ISO 75-1/-2
Vicat softening temperature, B 119 °C ISO 306
Coeff. of linear therm. expansion, parallel 70 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 18 % ISO 4589-1/-2
Electrical propertiesValueUnitTest Standard
ISO Data
Relative permittivity, 100Hz 3.5 - IEC 62631-2-1
Relative permittivity, 1MHz 2.9 - IEC 62631-2-1
Dissipation factor, 100Hz 400 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 propertiesValueUnitTest Standard
ISO Data
Luminous transmittance 90 % ISO 13468-1, -2
Other propertiesValueUnitTest Standard
Water absorption 2.2 % Sim. to ISO 62
Humidity absorption 0.6 % Sim. to ISO 62
Density 1190 kg/m³ ISO 1183
Material specific propertiesValueUnitTest Standard
ISO Data
Viscosity number 60 cm³/g ISO 307, 1157, 1628
Test specimen productionValueUnitTest Standard
ISO Data
Injection Molding, melt temperature 250 °C ISO 294
Injection Molding, mold temperature 82 °C ISO 294
Injection Molding, injection velocity 195 mm/s ISO 294
Processing Recommendation Injection MoldingValueUnitTest Standard
Pre-drying - Temperature 109 °C -
Pre-drying - Time 2 - 3 h -
Melt temperature 220 - 250 °C -
Mold temperature 60 - 90 °C -
Diagrams
Viscosity-shear rate , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Shearstress-shear rate , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Dynamic Shear modulus-temperature , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Stress-strain , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Secant modulus-strain , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Specific volume-temperature (pvT) , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Spec. enthalpy/mass-temp. (DSC) , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Tensile modulus-temperature , PLEXIGLAS® Heatresist hw55, PMMA, Röhm
Characteristics
Processing
Injection Molding
Delivery form
Pellets
Special Characteristics
Light stabilized or stable to light, U.V. stabilized or stable to weather, Heat stabilized or stable to heat, Transparent
Features
Copolymer
Chemical Resistance
Environmental Stress Crack Resistance
Regional Availability
North America, Europe, Asia Pacific, South and Central America, Near East/Africa
Other text information
Injection molding
PREPROCESSING
Predrying temperature: max. 109 °C
Predrying time in a desiccant-type drier: 2 - 3 h
PROCESSING
Melt temperature: 220 - 250°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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