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Home >> Products Specification >> Polystyrol 495 F
Polystyrol 495 F
 
Product description
Polystyrol 495 F is a high flow, high impact polystyrene with a good heat resistance and a high stiffness
 
Processing
Polystyrol 495 F can be injection molded under different conditions depending on machinery available and articles molded. Mass temperature can be as high as 260°C. Polystyrol 495 F is suitable for gas assisted injection molding.
 
Applications
Consumer electronics: TV-front and back; chassis for VCR and CD player. Household: internal parts of vacuum cleaners; refrigerator parts; drawers Audio- and video cassettes; printer housings, keyboards, computers, copier parts
 
Form supplied and storage
Polystyrol 495 F is supplied as cylindrical shaped granules. It has to be kept in its original containers in a dry, cool place. Avoid direct exposure to sunlight. Polystyrol 495 F can also be stored in silos.
 
Food legislation
If used unmodified and under appropriate processing conditions parts from Polystyrol 495 F comply with the usual requirements for food packaging. Detailed written confirmations (e.g. BgVV, FDA) are given on request. Please contact our regional sales office
 
Product safety
During processing of Polystyrol 495 F small quantities of styrene monomer may be released into the atmosphere. At styrene vapor concentrations below 20 ppm no negative effects on health are expected. In our experience, the concentration of styrene vapour does not exceed 1 ppm in well ventilated areas - that is where five to eight air changes per hour are made.
 
Note
The statements in this document are based on our present technical knowledge and experience. They do not relieve processors of the responsibility of carrying out their own tests, and purchasers of our products are expected to carry out receiving inspections. Neither do they imply any binding assurence of suitability for a particular purpose. Any proprietary rights should be respected and existing legislation observed.
 
Typical Properties for uncoloured products
  Test method Unit Value
 
ISO ASTM
 
ISO ASTM
Mechanical Properties      
Tensile stress at yield / at break
527 D 638
MPa
26 27
Strain at yield
527 D 638
%
1.5  
Strain at break
527 D 638
%
40 40
Young modulus
527 D 638
MPa
2000 2000
Flexural strength
178 D 790-1
MPa
40 35
Flexural modulus
178 D 790-1
MPa
2100

2000

Shear modulus
6721-2  
MPa
   
Charpy impact strength 23°C / - 30°C
179/1eU -
kJ/m²
NB/130  
Charpy notched impact strength 23°C / - 30°C
179/1eA  
kJ/m²
17  
Izod notched impact strength 23°C
180/1A D 256-A
kJ/m²
140 -
Izod notched impact strength 23°C
180/1A D 256-A
kJ/m²
   
Ball indentation hardness H 132/30, H 358/30
2039-1  
MPa
74  
Rockwell hardness, - Scale
2039-2 -
 
   
       
Thermal properties      
Vicat softening temperature VST/A/50
306  
°C
87  
Vicat softening temperature VST/B/50
306  
°C
98  
Temp.of deflection under load 1.8 MPa/HDT A
75  
°C
85  
DTUL 0.45 MPa/ HDT B
75  
°C
89  
       
Processing      
Melt volume rate MVR 200/5
1133  
ml/10 min
9.5  
Melt temperature range
   
°C
180-260  
       
Dielectric properties      
Dielectric constant at 100 Hz - 1MHz
IEC 250  
 
2.50  
Volume resistivity
IEC 93  
W cm
>10 E 16  
Surface resistivity
IEC 93  
W
>10 E 13  
Dielectric strength
IEC 243/1  
kV/mm
155  
       
Optical properties      
Specular gloss (smooth surface; DIN 67530)
   
%
45  
UV colour fastness (D E) acc.to IBM 7.17
   
 
   
       
Flammability      
UL 94 ( 1,6 mm )
   
class
94HB  
UL 94 ( 3,2 mm )
   
class
94HB  
IEC 65 ( 2,4 mm )
IEC 65  
+ / -
+  
IEC 695-2-1 ( 1,0 mm )
IEC 695-2-1  
°C
   
       
Miscellaneous properties      
Density
1183  
g/cm³
1.05  
Water adsorption (Method A)
62  
%
<0,1  
Moisture adsorpt. (23°C/50% r.h.)
   
%
<0,1