LGEXPOL, Expandable polystyrene manufactured by LGPI offers versatility of usefulness over wide application range. Grades are made to suite all requirements with strict emphasis on quality.
Various applications of LGEXPOL:
-Packing for electrical and electronic equipment
-Fruits and food packing
-Building construction
-Roads and bridges construction
Expandable Polystyrene Grades
|
Grade code
|
Bead size range
(Ø mm)
|
Min. achievable density (gpl)
|
Molded density range (gdl)
|
Typical applications
|
|
LGE 121
|
1.8 - 2.5
|
14.0
|
14 - 30
|
Low density blocks
|
|
LGE 221
|
1.2 - 1.8
|
14.5
|
14.5 - 30
|
Medium low density blocks
|
|
LGE 321
|
1.0 - 1.2
|
16.0
|
16 - 30
|
Medium / low density blocks
|
|
LGE 325
|
0.7 - 1.2
|
16.0
|
16 - 40
|
Shape molding / high density blocks
|
|
LGE 422
|
0.7 - 1.0
|
18.0
|
18 - 40
|
Thin wall shape molding
|
|
LGE 425
|
0.5 - 1.0
|
19.0
|
19 - 40
|
Thin wall shape molding
Insulation blocks and boards
|
|
LGE 522
|
0.5 - 0.7
|
20.0
|
20 - 40
|
Thin wall shape molding
|
|
LGE 624
|
0.3 - 0.5
|
55.0
|
55 - 70
|
Thin wall disposable containers
|
|
LGE 155 SE
|
1.8 - 2.5
|
15.0
|
15 - 30
|
Flame retardant insulation boards, building panels etc.
|
|
LGE 255 SE
|
1.2 - 1.8
|
15.0
|
15 - 30
|
Flame retardant insulation boards, building panels etc.
|
|
LGE 355 SE
|
0.7 - 1.2
|
18.0
|
18 - 30
|
Flame retardant, pipe insulation, ceiling tiles
|
PS: It is is possible to get prepuf densities lower than above
on multiple expansion. Quality of molding depends upon densities, maturation
time and steaming conditions.
Typical properties of expanded polystyrene
| Density range |
Kg/cm²
|
15 - 20
|
20 - 25
|
25 - 30
|
| Comprehensive strength |
Kg/cm²
|
0.8 - 1.0
|
1.0 - 1.6
|
1.6 - 2.2
|
| Tensile strength |
Kg/cm³
|
3 - 4
|
4 - 5
|
5 - 6
|
| Application range |
°C
|
(-200) - (+90)
|
(-200) - (+90)
|
(-200) - (+90)
|
|
Water absorption:
|
|
|
|
|
| 1 day in water |
Vol%
|
0.2 - 0.5
|
0.2 - 0.4
|
0.2 - 0.4
|
| 7 days in water |
Vol%
|
0.4 - 0.8
|
0.3 - 0.7
|
0.3 - 0.7
|
| 240 days in water |
Vol%
|
2 - 4
|
2 - 3
|
2 - 3
|
| Capillary suction |
-
|
none
|
none
|
none
|
|
Thermal conductivity at 10°C:
|
|
|
|
|
| Average specimen temp. |
W/m.K°
|
0.031 - 0.034
|
0.030 - 0.031
|
0.029 - 0.030
|
| Self ignition point (approx.) |
°C
|
300
|
300
|
300
|
| Melting range |
°C
|
100 - 120
|
100 - 120
|
100 - 120
|
| Dimensional stability at 80°C |
%
|
0.5
|
0.5
|
0.5
|
| Flexural strength |
Kg/cm²
|
2.5 - 3.0
|
3.0 - 3.5
|
3.5 - 4
|
