Polyurethane Foam for filter
1.Physical and chemical Character
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PU A
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PU B
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Appearance
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Ivory-white or achromatous liquid
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Brown liquid
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Hydroxide value
(KOHg)
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60±30
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N/A
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NCO Percent%
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N/A
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28±2
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Viscosity
25 mpa·s
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300±50
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120±50
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Density
20 gcm3
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1.0±0.15
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1.2±0.1
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2.Reactivity Character(component temperature 25 )
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Index
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Unit
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Manual Mix
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Low-tension machine
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High-tension machine
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Cream time
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S
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25-40
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25-35
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20-30
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Gel time
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S
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25-40
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25-35
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20-30
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Tack free time
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S
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75-85
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70-80
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60-70
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Free action Density
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S
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120-150
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110-150
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110-140
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Mixing ratio
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PU A: PU B=100:20~35(Weight ratio)
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Remark:Above index could be adjusted according to customers need
3.Capability Index
Production density (m3): 200800
Hardness: A1645
Tear StrengthNmm: ≥3.6
Tensile strength Mpa: ≥0.9
Elongation at break%: ≥120
40% Compressive strengthMpa:0.02-0.22
40% Compressive strength70110 hour,Mpa:0.06-0.20
Variable Compression set 7022 hour,%: ≤10
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