产品介绍
• Introduction
The main component of silica gel is amorphous silicon dioxide, transparent or milky white irregular shape grain or ball type solid. By using sodium silicate react with vitriol, then adopts a series of post-processing of especial aging treatment and acid foam. The water molecule exhibits good affinity. The most favorable moisture absorbing environment for silica gel is room temperature 20~32%, high humidity 60~90%, and it can make relative humidity decreased by 40%. Silica gel is non-crystalline substance, with the features of porous structure, strong ability of absorption, the ability of adsorbing more substances, it is a kind of high-powered active adsorbent.
• Classify & Features
a. Macro-porous silica gel desiccant (A type silica gel): ball shape and block shape, colorless or light yellow translucence glassy grain
Feature: the adsorb ability is high when the relative humidity is low, point reaches -40℃～-70℃
B type silica gel: translucence ball shape or translucence irregular block shape grain
Feature: the adsorb ability is high when the relative humidity is high, optimum for controlling humidity
c. Macro-porous silica gel (C type silica gel): macro-porous ball shape silica gel is milky white glassy ball shape grain, macro-porous block shape silica gel is milky white glassy irregular grain
Feature: the adsorb ability is high when the relative humidity is high, optimum for high humidity dehydration
d. Tiny ball silica gel: white glassy transparent ball shape grain
Feature: used mainly for precision instrument and machinery dryness, the adsorb ability is high when the relative humidity is low, point can be reduced below -70℃ at ordinary temperature.
e. Blue gel indicator, discoloration silica gel and cobalt free discoloration silica gel: to indicate environmental relative humidity or judge the desiccant is effective or not by means of a color change. With the capability of blue silica gel, without cobalt chloride, green environment protection product
f.FNG silica gel: it does not crack or flake off when wet, used for air dryness in air separation unit and as a buffer desiccant in general silica gel protective layer
• Capability Index
a. Micro-porous silica gel
Index Item Index High-class First-class Quality part Granularity Pass Rate，% Agreement Stacking Density，g/L Agreement Vapor adsorb ability when 25℃ RH=20% ≥ 10.5 10.0 8.0 RH=50% ≥ 23.0 22.0 20.0 RH=90% ≥ 34.0 32.0 30.8 Ball Shape Pass Rate，% ≥ 80 一 一 Heating Reduction，% ≤ 2.0 4.0 6.0 PH 4～8 一 一 Specific Resistance，Ω·cm ≥ 3000 Silicon Dioxide，% ≥ 98 Remarks:HG-T2765.1 each item test methods refers to HG-T2765.5 b. B type silica gel
Index Item Index High-class First-class Granularity Pass Rate，% Agreement Stacking Density，g/L Agreement Vapor adsorb ability when 25℃，% RH=20% ≥ 4.0 3.0 RH=50% ≥ 11.0 10.0 RH=90% ≥ 70.0 50.0 Ball Shape Pass Rate，% ≥ 82 一 Heating Reduction，% ≤ 2.0 2.0 PH 5.5~7.5 4~8 Specific Resistance，Ω·cm ≥ 5000 3000 Silicon Dioxide，% ≥ 98 98 Remarks:HG-T2765.6 each item test methods refers to HG-T2765.5 c. Macro-porous silica gel
Index Item Macro-porous ball shape silica gel Macro-porous block shape silica gel High-class First-class Quality part Granularit，mm 4.0~8.0 2.0~5.6 4.0~8.0 2.0~5.6 4.0~8.0 2.0~5.6 >5.6 2.8~8.0 1.4~4.0 0.25~2.0 Granularity Pass Rate，%≥ 94 90 90 Rate of wear，%≤ 4 6 6 8 8 10 10 10 30 — Stacking Density，g/L≥ 400 400 Pore Volume，ml/g≥ 0.85 0.75 0.72 0.76 Grain Pass Rate，%≥ 78 75 Heating Reduction，%≤ 5 5 Remarks:HG-T2765.2 each item test methods refers to HG-T2765.5 d. Tiny ball silica gel
Index Item Index High-class First-class Quality part Granularity，μm 300~850 125~425 300~850 125~425 300~850 125~425 Granularity合格率，%≥ 94.5 94.5 90 85 85 80 Rate of wear，% ≤ 14 10 14 10 14 10 Stacking Density，g/L ≥ 300 Pore Volume，ml/g 0.8~1.3 Surface area㎡ ≤ 300~550 Heating Reduction，% ≤ 4 Remarks:HG-T2765.3 each item test methods refers to HG-T2765.5
e. Indicator silica gel
Index Item Index Blue gel indicator Discoloration silica gel Cobalt free discoloration silica gel Appearance Blue, light blue Blue, light blue Graphical representation or agreement color Granularity Pass Rate，% ≥ 96 90 90 Rate of wear，% ≤ 10 10 10 Vapor adsorb ability，% RH=20% ≥ 8 — — RH=35% ≥ 13 — — RH=50% ≥ 20 — — Heating Reduction，% ≤ 5 5 5 Coloration RH=20% Blue, light blue RH=35% Purple or amaranth RH=50% Light amaranth Amaranth or light amaranth Graphical representation or agreement color Remarks:HG-T2765.4 each item test methods refers to HG-T2765.5 • Product Specification
Parts Name Specification Each Error(±g) Each Outer Size(±5mm) Pack/Bag Pack/Box 1 g 0.1 30*40 4*5000 20000 1.5 g 0.1 35*40 4*4000 16000 2 g 0.1 35*50 4*2500 10000 3 g TM Paper 0.1 50*55 4*2000 8000 other 0.1 45*50 4*2000 8000 5 g TM Paper 0.1 45*65 5*1000 5000 other 0.1 45*55 5*1000 5000 7.5 g 0.1 60*70 5*800 4000 10 g TM Paper 0.1 50*80 4*500 2000 other 0.1 60*70 4*500 2000 15 g 0.2 60*90 5*400 2000 20 g 0.2 60*95 4*250 1000 25 g 0.2 80*90 4*250 1000 30 g 0.2 80*97 4*200 800 40 g 0.2 70*115 4*150 600 50 g 0.5 80*120 5*100 500 60 g 0.5 70*135 5*100 500 100 g 0.5 100*137 5*50 250 • Mode of Packaging
I,One carton +2PE isolation bag (desiccant is packed in two PE bag respectively, covered a PE bag again, then boxed up)
II,Carton +10PE isolation bag (desiccant is packed in ten PE bag respectively, covered a PE bag again, then boxed up)
III,One carton +2PE isolation bag +2 metal bucket (desiccant is packed in PE bag, then stored in metal bucket, two metal buckets are packed in carton