Urethane Rubber Sponge

View the MISUMI urethane, rubber, and sponge material properties.

Urethane, Rubber, and Sponge Properties

The values ​​shown are representative values, not guaranteed values.

Urethane Properties

item unit Urethane
standard Brucolan® Abrasion resistance Antistatic urethane Heat resistant Memory foam Ultra low hardness Ceramic urethane
hardness Shore A 95 90 70 50 30 92 68 90 70 90 70 50 90 70 15 95 90 70 50
specific gravity - 1.13 1.13 1.2 1.2 1.2 1.26 1.2 1.13 1.2 1.2 1.13 1.03 1.02 1.13 1.13 1.2 1.2
Tensile strength MPa 44 27 56 47 27 46.5 60 44.6 31.3 26 53 45 44.6 11.8 0.6 42 26 53 45
Growth % 380 470 720 520 600 690 650 530 650 440 680 490 530 250 445 360 440 680 490
Volume specific resistivity (Ω ・ cm) 10 9-12 - - 2.1 × 10 8 - - - - -
Heat-resistant 70 80 (120 degrees for a short time) 70 70 120 70 80 70 70
Cold resistance -40 -20 -20 -20 -20 -20 -20 -40 -40 -20

Each characteristic value of tensile strength and elongation is tested based on JIS standard K6251.

Rubber Properties

item unit Nitrile rubber Chloroprene rubber Ethylene rubber Butyl rubber Fluorine rubber Silicon rubber (SI) Low elasticity rubber Natural rubber
(NBR) (CR) (EPDM) (IIR) (FPM) standard High strength (Hane Night ®) (NR)
hardness Shore A 70 50 65 65 65 80 60 70 50 50 57 57 32 45
specific gravity - 1.6 1.3 1.3 1.6 1.2 1.5 1.8 1.8 1.9 1.2 1.2 1.3 1.3 1.2 0.9
Tensile strength MPa 12.7 4.4 13.3 12.8 7.5 7.5 12.5 10.8 7.4. 8.8 7.8 8.3 10.3 16.1
Growth % 370 400 460 490 380 330 270 300 330 400 810 840 730
Volume resistivity (Ω ・ cm) 10 10 10 9 10 8 10 8 10 6 10 6 10 11 10 13 10 14 - - -
Maximum operating temperature 90 90 100 120 120 230 230 200 200 60 60 70
Continuous operating temperature 80 80 80 80 80 210 210 150 150 30 30 70
Cold resistance -Ten -Ten -35 -40 -30 -Ten -Ten -70 -50 Ten Ten 0

Each characteristic value of tensile strength and elongation is tested based on JIS standard K6251.

The characteristic value of volume resistivity is tested based on JIS-K6271-1.

Sponge Properties

item unit Polyurethane
sponge
Chloroprene rubber
sponge
EPDM
sponge
NBR
sponge
Silicone rubber sponge Fluorine rubber
sponge
HS35 HS15
Apparent density g / cm 3 0.022 0.18 0.09 to 0.15 0.21 0.35 ~ 0.37 0.3 0.45
Bubbles - Open cell Closed cell Closed cell Closed cell Closed cell Closed cell Closed cell
Tensile strength MPa
{kgf / cm 2 }
≧ 0.076
{≧ 0.77}
0.9
{9}
0.4
{4}
0.8
{8}
1.6-1.8
{16-18}
1
{10}
2.7
{27}
Growth % ≧ 120 170 Over 180 200 200-250 250 280
25% compressive load MPa
{kgf / cm 2 }
- 5.3 × 10 -2
{0.54}
3.1 × 10 -2
{0.32}
6.5 × 10 -2
{0.66}
-(* 1) -(* 3) -(* 1)
Continuous use temperature * 2 -10-70 -35-130 -40-130 -10 to 140 -70-200 -20-230
Abrasion resistance
Aging resistance
water resistant
chemical resistance Oil (gasoline) ×
acid × ~ △ × ~ ○ △ ~ ○ △ ~ ○
alkali × △ ~ ○
Organic solvent × × ~ △ × × ~ △ × × ~ ○

In the case of the type with a seal, the adhesiveness of the seal decreases at high temperatures (about 80 ° C or higher).

  • * 1 Compressed permanent strain <40% compression> (100 ° C / 24h) 29%
  • * 2 The continuous use temperature is a temperature at which there is no sudden deterioration in quality even after long-term use.
  • * 3 Compressed permanent strain <40% compressed> (150 ° C / 24h) 8% (based on JIS K 6250)
item unit Low elasticity rubber sponge Memory foam sponge Low strain sponge
Apparent density g / cm 3 0.3 0.097 0.26
Bubbles - Closed cell Closed cell Closed cell
Tensile strength MPa
{kgf / cm 2 }
0.9
{9}
0.9
{9}
0.32
{3.2}
Growth % 480 210 73
25% compression permanent strain * 1 % 62 5.1 0.2
Continuous use temperature * 2 20-60 10-50 -40-150
Abrasion resistance
Aging resistance
water resistant
chemical resistance Oil (gasoline) × × ×
acid ×
alkali ×
Organic solvent × × ×
  • * 1 Compressed permanent strain JIS K6262
  • * 2 The continuous use temperature is a temperature at which there is no sudden deterioration in quality even after long-term use.
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