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Wednesday, December 12, 2018

Material

Rubber Sponge

Rubber Sponge after different pressing and shaping process, are used in audio speaker, office appliances, OA, car and other industrial products.

Rubber quality form

Test menu / material Hardness Rubber material Specific gravity Strength Stretch Heat resistant Cold resistant
Natural rubber (NR) 30 - 90 0.91 - 0.93 30 - 300 100 - 850 70 -50 ~ -70
Styrene Butadiene Rubber (SBR) 40 - 95 0.93 - 0.94 50 - 200 100 - 600 100 -30 ~ -60
Buty1 rubber (UR) 40 - 90 0.91 - 0.93 50 - 150 100 - 900 100 -30 ~ -55
Athylen propylene rubber (EPDM) 60 - 80 0.86 - 0.87 50 - 200 100 - 600 120 -40 ~ -60
Chloroprene rubber (CR) 40 - 95 1.15 - 1.25 50 - 250 100 - 900 100 -35 ~ -55
Nitril rubber (NBR) 40 - 95 1 - 1.20 50 - 250 100 - 700 100 -10 ~ -20
Silicon rubber (SI) 10 - 80 0.95 - 0.98 40 - 100 50 - 500 200 -70 ~ -120
Urethan (U) 60 - 100 1.23 160 750 70 -300 ~ -60

Sponge quality form

Test menu / material Hardness C type Specific gravity Pulling strength Stretch Tear strength 25% Compression Reference
C25 (CR) 25 0.25 15.5 160 3.2 0.77 UL-94HBF
C19 (CR) 22 0.20 7 150   0.63 UL-94HBF
C24 (CR) 34 0.24 12 170 2.8 0.90 Hard type
C27 (CR) 15 0.19 9.3 210 2.5 0.44 Soft type
C15 (CR) 8 0.15 7.1 410 3.1 0.28 Very soft type
C22 (CR) 35 0.27 13.9 110   1.03 Non movetype
N19 (NB) 20 0.18 5 150   0.40  
NB23 (NBR) 22   6.8 210   0.71 Stand oily type
E20 (EPT) 22 0.30 12. 360   0.4 Stand ozone type
N09 (compose) 5 0.10 3.2 220   0.23