ESD Dissipative Spiral Coil (ESD Spiral Wrap)

  1. Permanent Static Dissipative
  2. Insensitive to environment
  3. Special design for cleanroom application
  1. To wrap cable or wire inside cleanroom
  2. To coil pen inside cleanroom
  3. Other
 Decay time at end of tube 0.8 to 1.3 seconds
 Decay time at centre of tube  0.5 to 1.2 seconds
 Float voltage observed 0V to 3V
 Peel Off Voltage Observed 8 * 10 to the power of 8 

OUTGASSING – Three samples of Spiral Coil were used and placed in an outgassing vessel at 85 Degree C. It was then flushed continually for three hours at 50ml/min with grade 5 nitrogen. A carbotrap ‘B’ / carbotrap ‘C’ tube were then used to trap the outgassing constituents after which analyzing using GC/MS with ATD.

FTIR / SILICONE OIL / HYDROCARBONS – The presence of silicone oil and hydrocarbons were extracted in solvent soluble residue from one piece of 15.5 “ of ESD Bluish Spiral Coil. Both the inner and outer surfaces, a total of 121cm square, were rinsed with 10ml of hexane and isopropanol by mixing a portion of 1 : 1 (v/v) of the solvent solution. A clean 30ml glass beaker was used to collect the rinsate. The solvent solution was evaporated to dryness. Thereafter, FTIR / HATR was used to analyze for the presence of silicone oil and hydrocarbons on any residue rinsed from the sample.

IONIC CONTAMINATION – A ESD Bluish Spiral Coil sample were divided into three sections to test for ionic contamination. Three pre-clean glass beaker containing 10ml of de-ionized water was given one section of the spiral coil sample each and then capped off to prevent evaporation. The glass beakers were then placed in an 80 Degree C oven. The water extract was then analyzed using ion chromatography. A hand measured apparent surface area of 10.2cm square was used to calculate the results. 

Below are the data obtained from using the following chemical


 Section 1 Sample 

 Section 2 Sample 

 Section 3 Sample 

 BHT 12 ug/g 12 ug/g 13 ug/g 12 ug/g
 KETONES 28 ug/g 28 ug/g 21 ug/g 26 ug/g
 SILOXANE 1 ug/g 0 ug/g 0 ug/g 1 ug/g
 HYDROCARBON, OTHERS  19 ug/g 15 ug/g 14 ug/g 16 ug/g
 TOTAL 60 ug/g 55 ug/g 48 ug/g 54 ug/g


- Below shown was obtain from the analyzed result on one section of the Spiral Coil.


 Section 1 Sample 

 SILICONE OIL 10 As per customer's specification 
 HYDROCARBONS  160 As per customer's specification

Result for both the silicone oil and hydrocarbons are in nanograms/cm square surface area.

- The result tested as follows


 Section1 Sample (ug/cm square) 

Section 2 Sample  Section 3 Sample  Average  Limits
 AMMONIUM 0.015 0.014 0.020 0.016 As per customer's specification 
 BROMIDE 0.008 0.008 0.004 0.007
 CALCIUM 0.019 0.020 0.022 0.020
 CHLORIDE 0.008 0.010 0.014 0.010
 FLUORIDE 0.032 0.029 0.031 0.030
 MAGNESIUM 0.001 0.001 0.001 0.001
 NITRATE 0.003 0.004 0.004 0.003
 NITRITE 0.000 0.000 0.000 0.000
 PHOSPHATE 0.086 0.069 0.071 0.075
 POTASSIUM 0.010 0.012 0.011 0.011
 SODIUM 0.155 0.150 0.147 0.150
 SULFATE 0.000 0.005 0.000 0.001


 0.337 0.322 0.325 0.324

- On analysis, the following result were obtain:

 Test Parameter Digestion / Extraction Method Analysis Method  Result, ppm (w/w) 
 Mercury (Hg) AC/RoHS/0010 Ver1.1/05 Wet Acid Digestion (Microwave)  CVAAS ND
 Lead (Pb) AC/RoHS/0007 Ver1.0/05 Dry Ashing ICP-AES ND
 Cadmium (Cd) AC/RoHS/0007 Ver1.1/05 Wet Acid Digestion (Microwave) ICP-AES ND
 Hexavalent Chromium (Cr 6+) Ac/RoHS/0011 Ver1.0/05 EPA 3060A / 7196A (Modified) ND
 Polybrominated Biphenyls (PBB) AC/RoHS/0012 Ver1.1/05 (Microwave) GC-MS ND
 Plybrominated Diphenyl Ethers (PBDEs)  AC/RoHS/0012 Ver1.1/05 (Microwave) GC-MS ND
  1. Sample was prepared as in AC/ROHS/0006 Ver1.0/05 and all the methods listed above are reference to the IEC 111/24/CD/Ed.1- Procedure for determination of levels of regulated Substances in Electrotechnical Products.
  2. CVAAS = Cold Vapour Atomic Absorption  Spectrometry
    ICP – AES = Inductively- Coupled Plasma – Atomic Emission Spectrometry
    GC-MS = Gas Chromatography – Mass Spectrometry 
  3. The Method detection limits(MDL) for Lead, Cadmium, Polybrominated Biphenyls and Polybrominated Diphenyl Ethers = 1 ppm each
  4. The Method detection limits(MDL) for Hexavalent Chromium = 2ppm
  5. The Method detection limits(MDL) for Mercury = 0.5ppm
  6. “ND” = Not detected (Less than or equal to 5ppm)
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