412 TECHNICAL INFORMATION 2Features of Low Rebound Urethane and Low Elasticity Rubber (Hanenaito®) t Low Rebound Urethane It has the same properties as urethane, and excels in shock absorption. With more resistance to permanent compression than standard urethane, it is hard to deform. Not suitable for absorption of large impact energy because its tensile strength and elongation resistance are weaker than that of urethane of the same hardness. t Low Elasticity Rubber (Hanenaito®) &Hanenaito® is a registered trademark of Naigai Rubber Industry Co., Ltd. It is used as cushioning material for pallet damper, conveyor machine, precision instrument etc, because of its good elongation and shock absorption. Also it is used as vibration absorption materials of various precision instruments because of its excellent vibration absorption. 50 40 30 20 10 0 -30 Impact Resilience (%) Acceleration (m/s 2) Acceleration (m/s 2) -20 -10 0 10 20 30 40 50 Listed values are for reference, not guaranteed. Ambient Temperature (°C) Low Rebound Urethane Low Elasticity Rubber 30 0 –30 30 0 –30 100 300 500 700 900 Z Z Characteristic Values Natural Rubber Low Rebound Urethane Time after Shock (msec) Low Elasticity Rubber Z Z 2Impact Resilience Variation by Temperature of Low Elasticity Rubber and Low Rebound Urethane 2Shock Absorption Comparison of Low Elasticity Rubber and Low Rebound Urethane With Hanenaito® Without Hanenaito® 0.015 0.035 0.055 -1.0 0.0 1.0 Time (sec.) Acceleration (0.1G) Measurement Results: Sample: Hanenaito® Shore A 32, 1mm Thickness Measurement Method: An iron plate is struck with hammer and the vibration is measured by an FFT at the center of the plate. Hanenaito® Steel Platev Acceleration Sensor FFT Analyzer Iron Stand Hanenaito® Comparison of Damping Effects Reference: Compression Set of Low Rebound Urethane * The above data is measured at room temperature 23°C. * 70°Cx24H 25% Compression Low Rebound Urethane 1% Urethane (Shore A70) 25% 2Rubber Properties Item Unit Nitrile Rubber (NBR) Chloroprene Rubber (CR) Ethylene Rubber (EPDM) Butyl Rubber (IIR) Fluororubber (FPM) Silicon Rubber (SI) Low Elasticity Rubber (Hanenaito®) Natural Rubber (NR) Standard High Strength Hardness Shore A 70 50 65 65 65 80 60 70 50 50 57 32 45 Specific Gravity - 1.6 1.3 1.6 1.2 1.5 1.8 1.9 1.2 1.2 1.3 1.2 0.9 Tensile Strength MPa 12.7 4.4 13.3 12.8 7.5 12.5 10.8 7.4 8.8 7.8 8.3 10.3 16.1 Elongation % 370 400 460 490 380 330 270 300 330 400 810 840 730 Maximum Operating Temperature °C 90 99 100 120 120 230 230 200 200 60 60 70 Temperature of Continuous Use °C 80 80 80 80 80 210 210 150 150 30 30 70 Low Temp. Resistance °C -10 -10 -35 -40 -30 -10 -10 -70 -50 10 10 0 &The characteristic values of tensile strength and elongation are tested based on the JIS standard K6251. 2Features of Shock Absorbing Foam Excellent sound damping and vibration absorbing characteristics. Flexible material can be pasted on curved surfaces with ease. Lightweight material can be applied on large panel areas. Best suited for human body protection. Can be pasted in multi-layers where more protection is needed. 2Features of Special Urethane Foam SOFRAS® This special urethane foam excels in water retention and abrasion resistance allowing it to be used in industrial purposes such as application and moisture absorption. SOFRAS® excels in abrasion resistance and requires less concerns about dust shedding, whereas the use of sponges and felts may result in shedding of dust and felt fiber. t Enlarged Photo of Grease-impregnated Special Urethane *Above figures are the measured values for the shock absorbing gel as a material, and there are slight differences between the values for the bumping products made with this material featured. t 1SPQFSUJFT PG 4IPDL "CTPSCJOH (FM Item Unit Shock Absorbing Gel Specific Gravity - 1.0 Hardness Asker F 75 Tensile Strength MPa 0.81 Elongation % 885 Heat resistance °C 100 Low Temp. Resistance °C -10 2Elasticity of Shock Absorbing Gel P.410, 435 t 4IPDL "CTPSCJOH (FM t 6SFUIBOF 4IPSF " Normal State When Applied Force Normal State When Applied Force A major characteristic is the three-dimensional slow recovery, the function to recover after compression slowly and in multiple directions. Pressed as thin as shown in the photo and recovers to the original shape gradually after being released from pressure. * The double-layer structure of the gel part reduces stickiness. Steel Ball Collision Noise Level Test *A steel ball (Ø20, 36g) is dropped on a wooden base from a 55cm height, and the sound pressure level is measured with a microphone at a distance of 50m, positioned 50cm above the ground. 71.6 67.0 63.3 40 160 630 2.5k 10k 80 315 1.25k 5k 20k 80 70 60 50 40 30 20 'SFRVFODZ Hz PRGCW $PNQBSJTPO %BUB PG 13($8 $PQQFS #BMM $PMMJTJPO /PJTF /P "CTPSCFS PRGCW 5t PRGCW10t $PQQFS #BMM 'BMM $PMMJTJPO /PJTF dB Item No Absorber PRGCW5 PRGCW10 Collision Noise (dB) 71.6 67 63.3 Sound Pressure - 40% Reduced Sound Pressure 60% Reduced Sound Pressure t Correlation of Hardness and Rebound Force of Shock Absorbing Materials Hardness Extra Low (F Hardness) High (A Hardness) Rebound Low Shock Absorbing Gel Low Rebound Urethane Low Elasticity Rubber Large General Purpose Urethane General Purpose Rubber 2Drop Comparison of Rubber Ball and Hanenaito® Ball Height Rubber Ball Time Hanenairo® Ball After Impregnation Before Impregnation
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