FTTS-FA-009 Antistatic Textiles
Antistatic Textiles are mainly used to help human beings maintain work safety while working in an environment vulnerable to static interference. They are also used in operating rooms to prevent static electricity from interfering with major electronic medical devices. Moreover, in an environment with low humidity (very dry), garments on human body can produce a significant charge of static electricity due to friction. Antistatic textiles prevent human body from suffering the discomfort caused by static discharge.
Antistatic Textiles usually consist of metallic fiber blended with cotton, polyester, twisted or interwoven, as well as fiber containing “conductive carbon black“. For example, Nega-StatR by Barnet is a fine-filament bi-component yarn. Each filament has a unique, patented, “trilobal-carbon” conducting core surrounded by a sheath of polyester.
Four main measures are used to evaluate the antistatic function of textiles:
1. Surface resistance
2. Friction-charged electrostatic potential
3. Half-time
4. Decay time
With current technology in Taiwan, the friction-charged electrostatic potential of Antistatic Textiles can be as low as 1000 Volts or less (JIS L1094-B); their surface resistance can be as low as 1010Ω/sq or less (DIN 54345).
This criterion is applicable to textiles in all forms, including woven, knitted, coated/laminated fabric and non-woven. To consider the durability, the pretreatment, ex: repeated laundering, weathering, may be required.
Performance specification
3.1 Grade and Classification based on this specification
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Frictional charge (V)
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Grade
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Classification
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Knitted / Woven
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warp and weft
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V＜100
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3
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Excellent
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100≦V＜500
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2
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Good
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500≦V＜1000
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1
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Fair
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Surface resistance (Ω)
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Grade
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Classification
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1x104≦Ω＜1x106
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3
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Excellent
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1x106≦Ω＜1x109
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2
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Good
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1x109≦Ω＜1x1012
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1
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Fair
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Decay time (Second)
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Grade
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Classification
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S＜0.01
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3
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Excellent
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0.01≦S＜0.5
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2
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Good
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0.5≦S＜2
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1
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Fair
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3.2 General requirement for pretreatment
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Item
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General Requirement
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Test Method
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Washing
Durability
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tested in original state, after 20 washes, 50 washes (refer to note 1)
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(A) woven, coated/laminated fabric and non-woven fabric: washed based on AATCC 135 (1)Ⅲ(A)ii; knitted: washed based on AATCC 135 (2)Ⅲ(A)ii (refer to note 2)
(B)washed based on JIS L0217-103 (refer to note 2)
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Note 1
The treatment of washing durability may be varied upon agreement.
Note 2
The washing condition for Surface resistance and Decay time test should be based on AATCC 135; The washing method for Surface resistance test should be according to JIS L0217-103 |
