DuPontTM TYVEK DuPontTM TYCHEM - Global · PDF fileFabric particle barrier Protection against blood and blood-borne pathogens Particle barrier is measured by exposing a fabric to a

TyvekDuPontTM

Tychem

DuPontTM TYVEK® / DuPontTM TYCHEM®

CHEMICAL PROTECTIVE CLOTHING

TECHNICAL HANDBOOK

DPP-000 03/2007 HK

Copyright © 2007 DuPont. All rights reserved. The DuPont Oval Logo, DuPontTM,The miracles of scienceTM, TYVEK® and TYCHEM® are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.

Contents

*Please Note:All the testing data based onEN testing standard.

2 Fabric physical properties

3 Fabric particle barrier

3 Protection against blood and blood-borne pathogens

4 Liquid chemical penetration and repellency data

5 Chemical permeation

6 How to use the permeation data

7 Chemical permeation data*

18 Electrostatic charging and grounding

20 Chemical protective clothing “Types”*

21 Storage and shelf life

21 Disposal

Property Test method TYVEK® (Style 1422A) TYCHEM® C TYCHEM® F

Abrasion resistance EN 530 (method 2) 100 cycles (prEN 1512) 2000 cycles (prEN 1511) 2000 cycles (prEN 1511)

Air permeability ISO 5636-5 20 s Air impermeable Air impermeable

Basis weight ISO 536 41 g/m2 83 g/m2 118 g/m2

Burst resistance ISO 2960 (50 cm2) 108 kPa 145 kPa 227 kPa

Colour – white* yellow grey

Exposure to high – Melting point 135°C Garment seams open at 98°C Garment seams open at 98°Ctemperature

Exposure to low – Flexibility retained down Flexibility retained down Flexibility retained downtemperature to -73°C to -73°C to -73°C

Flex cracking resistance ISO 7854 (method B) > 100 000 cycles 100 000 cycles 2500 cycles (prEN 1511)

Linting propensity BS 6909 (Shirley Method 21) Pass rating: Excellent N/A N/A

Hydrostatic head ISO 811 120 cm >300 cm >300 cm

Ignition resistance EN 1146 Pass (prEN 1512) Pass (prEN 1511) Pass (prEN 1511)

Puncture resistance EN 863 10,8 N 18,5 N 24 N

Stability to heat ISO 5978 No blocking No blocking No blocking

Surface resistivity at EN 1149-1 4.8 x 109 Ohm 4.0 x 109 Ohm 5.9 x 109 Ohm25% relative humidity (rib surface) (inside white surface) (inside white surface)

1.7 x 1010 Ohm > 1 x 1013 Ohm > 1 x 1013 Ohm (smooth surface) (outside surface) (outside surface)

Thickness EN 20534 130 µm 170 µm 206 µm

Trapezoidal tear ISO 9073-4 26.1/30.6 N 37.9/54.5 N 37.2/47.5 resistance (MD/XD)

Water vapour ASTM E398 1700 g/m2. 24 h Water vapour impermeable Water vapour impermeablepermeability

2

Fabric physical properties

MD = Machine DirectionXD = Cross DirectionNT = Not TestedN/A = Not Applicable

* TYVEK ® (style 1422A) can be colour printed. Some of the property value of coloured TYVEK ® may differ slightly from those shown for white TYVEK ® (style 1422A).

FlammabilityTYVEK® (style 1422A), TYCHEM® C and TYCHEM® F fabrics are not flame resis-tant and should not be used close to fires, sparks, flames or sources of intense heat.

TYVEK® (style 1422A) melts at 135°C. The polymer coatings on TYCHEM® C and TYCHEM® F melt at 98°C.

Fabric particle barrier Protection against blood and blood-borne pathogens

Particle barrier is measured by exposing a fabric to a particle challenge and then determining the penetration of particles through the fabric by means of a particle counter. The particle counter determines the number of particles which have penetrated through the fabric per defined size range (see figure 1).

DuPont has measured the particle barrier of TYVEK® (style 1422A) to Aloxite dust according to a proposed European test method and to Chrysotile asbestos fibres according to a Haskell laboratory test method.

TYCHEM® C has passed penetration tests according to ASTM F1670 and ASTM ES22 at 2 psi (≈ 14 kPa) with synthetic blood and surrogate viruses so that it may be used to protect against body fluids, blood and blood-borne pathogens.

TYVEK® (style 1422A) passes ASTM F1670 and ASTM F1671 when conducted at a pressure of 1 psi (7 kPa).

(ASTM F1670 and ASTM F1671 test method numbers have been changed to ASTM F1670 and ASTM F1671 respec-tively.)

Aerosol generator

Aerosol distribution duct

To particle counterTest jigFabric

Clean particule free air

3

Table 1 Particle barrier of TYVEK® (Style 1422A)

Table 2 Asbestos fibre barrier of TYVEK® (Style 1422A)

Particle Challenge Penetration fluxsize concentration (No. pcles.min-1.m-2

(µm) (No. pcles/litre) per 1000 pcles.l-1)

1.0 – 1.5 47 042 1

1.5 – 2.0 10 384 2

>2.0 7 054 0

Fibre length Mean fibre Mean asbestos challenge fibre barrier (fibres/mm2) efficiency (%)

All fibre 41 558 99.08

lengths

All fibres longer 36 584 99.18

than 0.5 µm

Particle barrier data for TYVEK® (style 1422A)Measured according to CEN/TC 162 WG3 N263 test method using Aloxite dust and a pressure differential across the fabric of 1 Pa. Data from the Institute of Occupa-tional Medicine (UK) (see table 1).

Asbestos fibre barrier data for TYVEK® (style 1422A)Haskell laboratory test method – data from the DuPont Haskell Laboratory using Chrysotile asbestos fibres (see table 2).

Fig. 1 Test chamber

Penetration RepellencyChemical index (%) index (%)

Acetic acid (30%) 0.0* 95.4

Acetic acid (50%) 0.0* 95.4

Ammonium hydroxide (30% NH3 in water) 0.0* 91.5

Cobalt sulphate saturated solution 0.0* 94.9

Ethylene glycol 0.0* 98.0

Formic acid (30%) 0.0* 95.4

Formic acid (50%) 0.0* 93.4

Glycerol 0.0* 94.9

Hydrochloric acid (30%) 0.0* 96.7

Hydrochloric acid (36%) 0.0* 95.4

Hydrogen peroxide (30%) 0.0* 95.5

Isopropanol 0.5 90.2

Mercuric chloride saturated salt solution 0.0* 95.0

n-Heptane 2.6 74.3

Nitric acid (30%) 0.0* 96.2

Nitric acid (50%) 0.0* 96.0

Olive oil 0.0* 80.0

Phosphoric acid (30%) 0.0* 97.7

Phosphoric acid (50%) 0.0* 97.6

Potassium chromate saturated solution 0.0* 96.0

Potassium hydroxide (40%) 0.0* 97.8

Sodium acetate saturated salt solution 0.0* 95.5

Sodium benzoate saturated salt solution 0.0* 93.9

Sodium cyanide (45%) 0.0* 94.3

Sodium hydroxide (10%) 0.0* 93.6

Sodium hydroxide (40%) 0.0* 99.0

Sodium hypochlorite solution (12% Chlorine) 0.0* 95.5

Sulphuric acid (30%) 0.0* 96.8

Sulphuric acid (50%) 0.0* 97.5

Water/surfactant (surface tension 0.03 N/m) 0.0* 99.5

4

Liquid chemical penetration and repellency data

Liquid chemical penetration is a physical process whereby a liquid penetrates a fabric by passing through pores or holes in the fabric.

The European standard EN 368 (referred to as the “gutter test”) measures liquid penetration through a fabric and liquid repellency by a fabric.

In this test, the protective fabric to be tested is placed in an inclined gutter (45°) which is lined with an absorptive fabric. 10 ml of liquid is poured in 10 seconds onto the top of the test fabric via a nozzle.

Any liquid which penetrates the fabric via the fabric pores within 1 minute is expressed as a percentage of the original quantity poured onto the fabric.

The amount of liquid collected in the detector beaker after 1 minute is also expressed as a percentage of the original quantity and is a measure of the repellency of the fabric.

Test material

Detector beaker to collect and measure repelled liquid

Absorptive detector material to measure penetrated liquid

Supportive gutter

Splash nozzle

Fig. 2 Gutter test

Table 3 Penetration data for TYVEK® (style 1422A) – EN 368

Caution must be applied when interpreting penetration results according to EN 368 which simulates exposure to small amounts of chemicals (10 ml) for 1 minute duration only.

For example, TYVEK® (style 1422A) easily absorbs n-Heptane and Isopropanol and when exposed to larger quantities for

longer than one minute, considerable percentages of these chemicals would pass through TYVEK® (style 1422A).

To determine whether a fabric with a low penetration index is really a barrier to a specific liquid chemical, please refer to the chemical permeation data.

Note: 0*= Below detection limit

5

Chemical permeation

What is permeation?Permeation is the process by which a hazardous liquid chemical moves through a protective clothing fabric on a molecu-lar level. Permeation can be represented by the following simplified diagram (see figure 3).

Measuring permeationThe resistance of a protective clothing fabric to permeation by a potentially hazardous chemical is determined by measuring the breakthrough time and the permeation rate of the chemical through the fabric.

Permeation tests are conducted following the ASTM F739, EN 369 or EN 374-3 test methods.

Schematic of a permeation test cellThe outside surface of a test fabric is expo-sed to a liquid chemical or gas using a permeation test cell (see figure 4). Break-through of the chemical to the inside fabric surface is monitored by sampling the collection side of the cell and analytically determining when the chemical has permeated across the fabric.

Permeation rateThe rate at which the hazardous chemical permeates through the test fabric. Permeation rate is expressed as a mass of hazardous chemical flowing through a fabric area per unit of time (see figure 5).

Steady state permeation rate (SSPR)The constant permeation rate that occurs after breakthrough when the chemical contact is continuous and all forces affect-ing permeation have reached equilibrium (see figure 5).

Minimum detectable permeation rate (MDPR)The minimum permeation rate that can be detected during a permeation test. MDPR is a function of the sensitivity of the analytical measurement technique, the volume into which the permeated chemical is collected and the sampling time. Minimum detectable permeation rates can be as low as 0.001 µg/cm2. min in certain cases.

Fill level

Reservoir for hazardous chemical

To analyser

Protective fabricFlushing of chamber or discrete sampling

Fig. 4 Permeation test cell

Fig. 3 Permeation Fig. 5 “Typical” permeation cell results

Sorption of molecules onto the contracted (out-side) surface of the fabric.

Diffusion of the sorbed molecules across the fabric.

Desorption of the molecules from the opposite (inside) surface of the fabric.

6

Actual breakthrough timeThe average time elapsed between initial contact of the chemical with the outside surface of the fabric and the detection of the chemical at the inside surface by the analytical device.

An actual breakthrough time of >480 minutes and a permeation rate of “nd” (not detected) does not mean break-through has not occurred. It means that permeation was not detected after an observation time of eight hours. Permeation may have occurred, but at a rate less than the minimum detectable permeation rate (MDPR) of the analytical device. MDPR can vary depending on the chemical or on the analytical device.

When selecting a chemical barrier fabric, the MDPR and expected exposure times are used to determine if the level of pro-tection is sufficient taking into account the toxicity of the chemical used.

Normalized breakthrough time – according to EN 369The average elapsed time between initial contact of the chemical with the outside surface of the fabric and the time at which the chemical is detected at the inside surface of the fabric at a permeation rate of 1 µg/cm2. min. Thus the breakthrough time is ‘normalized’ as it is independent of the analyser sensitivity.

A normalized breakthrough time of >480 minutes means that the average permeation rate never reached the defined rate of 1.0 µg/cm2. min. However the chemical may have actually broken through.

Performance classification of normalized breakthrough timesAccording to the European standards for Chemical Protective Clothing, the resistance of clothing materials to per-meation by chemicals must be measured according to EN 369 or EN 374-3. The normalized breakthrough times are classified into six performance classes. For the European standard, the correlation table between the normalized break-through time in minutes and the performance class is shown in table 4.

The permeation data on the following pages is organized alphabetically.

The data was generated for DuPont by independent accredited testing laboratories. Unless otherwise stated, permeation tests were conducted at room temperatures (25°C ± 2°C).

Permeation rates are temperature dependent and typically increase with temperature.

The results reported in this handbook are averages from at least three separate samples.

Permeation reportsCopies of the complete individual chemical permeation reports and supporting permeation curves (where supplied by the testing laboratory) for chemical data contained within the permeation tables are available from DuPont on request.

Chemical mixturesPermeation characteristics of a mixture of chemicals can often deviate consideably from the behaviour for the individual chemicals. If protection against a mixture of hazardous chemicals is required, we recommend you contact DuPont for expert advice.

Normalized breakthrought time (EN 369/EN 374-3) EN in minutes class

≥100 1

≥300 2

≥600 3

≥120 4

≥240 5

≥480 6

Table 4

How to use the permeation data

Chemical permeation data

Physical stateThe phase of the challenge chemical during the test being reported:

Solid Liquid Gas

CAS no.Chemical Abstract Service Number. The number is unique for each chemical.

Definition of terms

7

8

L CAS-no. 79-10-7 Actual ASTM EN 369 EN SSPR MDPR min min min Class mg/cm2·min

TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm nm – 5.4 nmTYCHEM® F 348 >480 >480 6 0.001 0.001

Acrylic acid


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm nm – >0.1 nmTYCHEM® F 4 12 >480 6 0.57 0.001

Acrylonitrile


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F 3 >480 >480 6 0.04 0.001

Allyl alcohol


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F imm – >480 6 <0.1 0.05

Allyl chloride

G CAS-no. 7664-41-7 Actual ASTM EN 369 EN SSPR MDPR min min min Class mg/cm2·min

TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 3.1 0.001TYCHEM® F 55 79 >480 6 0.76 0.001

Ammonia


TYVEK® (style 1422A) imm imm imm – 16.7 0.014TYCHEM® C imm imm imm – 62 nmTYCHEM® F >480 >480 >480 6 <0.1 0.1

Ammonium hydroxide (30% NH3 in water)



Amyl acetate-n


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 2.1 0.14TYCHEM® F >480 >480 >480 6 <0.05 0.05

Aniline


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F 38 109 >480 6 0.56 0.001

Acetaldehyde


TYVEK® (style 1422A) imm imm imm – 13.5 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Acetic acid (30%)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm nm – 3 nmTYCHEM® F 73 >480 >480 6 0.08 0.02

Acetic acid (glacial)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 10 nmTYCHEM® F 125 >480 >480 6 0.06 0.001

Acetone


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 16 nmTYCHEM® F 84 157 >480 6 0.19 0.003

Acetronitrile



Acrolein


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F >480 >480 >480 6 <0.01 0.01

Acrylamide (50%)

Permeation data

Key: imm = immediate nm = not measured > = greater than L = liquid S = solid nt = not tested nd = nothing detected < = less than G = gas – = not applicable


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 22 0.006TYCHEM® F nt nt nt – nt nt

9

Butyl aldehyde



Butyl ether n-

L CAS-no. – Actual ASTM EN 369 EN SSPR MDPR min min min Class mg/cm2·min

TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 3.3 0.01TYCHEM® F nt nt nt – nt nt

California crude oil


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – high nmTYCHEM® F 44 >480 >480 6 0.05 0.001

Carbon disulphide



Carbon tetrachloride


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – >50 0.2TYCHEM® F >480 >480 >480 6 <0.2 0.2

Chlorine



Chloroacetic acid (68%)



Chlorobenzene



Anthracene (sat. sol. in toluene)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F 15 15 15 1 10 0.1

Antimony pentachloride



Benzene



Benzonitrile


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – high nmTYCHEM® F imm imm 2 – 105 0.001

Bromine


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 12 0.001TYCHEM® F imm >480 >480 6 0.07 0.001

Butadiene 1,3


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 1.6 nmTYCHEM® F nt nt nt – nt nt

Butanol n-


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 3.1 nmTYCHEM® F >480 >480 >480 6 0.001 0.001

Chloroethanol 2-

10


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – high 0.001TYCHEM® F 3 5 8 – 8 0.001

Dichloromethane



Diesel fuel


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 64 nmTYCHEM® F >480 >480 >480 6 <0.001 0.001

Diethylamine



Di(2-ethylhexyl) phthalate


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F nm nm >480 6 nm 0.05

Dimethylacetamide N,N



Dimethylformamide N,N-



Dimethyl nitrosamine



Dimethyl sulphide


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 350 nmTYCHEM® F 7 7 7 – 10 0.001

Chloroform



Chloromethyl methyl ether

S CAS-no. 1333-82-0 Actual ASTM EN 369 EN SSPR MDPR min min min Class mg/cm2·min

TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C >480 >480 >480 6 <0.1 0.1TYCHEM® F nt nt nt – nt nt

Chromic acid



Creosote


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F 140 180 206 4 2.7 0.001

Creosol 0-



Cyclohexane



Dichloro-propene 2,3-

Permeation data


11



Ethylene dibromide


TYVEK® (style 1422A) imm imm imm – 6.6 0.002TYCHEM® C >480 >480 >480 6 nm nmTYCHEM® F >480 >480 >480 6 <0.001 0.001

Ethylene glycol


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 168 0.02TYCHEM® F 55 65 120 4 1.4 0.01

Ethylene oxide


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F imm imm imm – nm 0.001

Fluorobenzene

L CAS-no. 50-00-0 Actual ASTM EN 369 EN SSPR

min min min Class mg/cm2·min

TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm >480 6 0.31 0.14TYCHEM® F >480 >480 >480 6 <0.001 0.001

Formaldehyde (37%)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm >480 >480 6 0.003 0.001TYCHEM® F nt nt nt – nt nt

Formalin (10%)


TYVEK® (style 1422A) imm imm imm – nm 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Formic acid (30%)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 2.3 0.001TYCHEM® F 172 260 >480 6 0.24 0.001

Formic acid (96%)



Dimethyl sulphoxide



Dioxane 1,4-



Epichlorohydrin



Ethanolamine


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 12.7 nmTYCHEM® F >480 >480 >480 6 <0.001 0.001

Ethyl acetate



Ethyl cellosolve acetate



Ethylenediamine



Furaldehyde 2-

MDPR

12


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 60 nm nm – 110 nmTYCHEM® F nt nt nt – nt nt

Hydrocyanic acid


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 180 >480 >480 6 nm 0.1TYCHEM® F >480 >480 >480 6 nm 0.1

Hydrofluoric acid (48%)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 180 >480 >480 6 <0.08 0.024TYCHEM® F >480 >480 >480 6 0.13 <0.08



TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm 2 20 1 12.3 0.1TYCHEM® F 10 39 140 4 1.2 0.1




Hydrogen chloride


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 60 nm nm – 0.11 nmTYCHEM® F nt nt nt – nt nt

Hydrogen cyanide liquid


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm nm – 6 nmTYCHEM® F imm imm 48 2 nm 0.01

Hydrogen fluoride (anhydrous)


TYVEK® (style 1422A) imm 15 15 1 >0.11 0.04TYCHEM® C >480 >480 >480 6 <0.1 0.1TYCHEM® F nt nt nt – nt nt

Hydrogen peroxide (30%)



Glutaraldehyde (5% aqueous solution)


TYVEK® (style 1422A) 450 >480 >480 6 0.03 0.01TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Glycerol



Hexamethylene diisocyanate


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – high nmTYCHEM® F >480 >480 >480 6 <0.001 0.001

Hexane



Hydrazine


TYVEK® (style 1422A) 30 30 30 1 50.3 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Hydrochloric acid (30%)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 30 93 235 4 1 0.0007TYCHEM® F >480 >480 >480 6 <0.1 0.1

Hydrochloric acid (37%)

Permeation data


13


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 50 190 >480 6 0.18 0.04TYCHEM® F >480 >480 >480 6 <0.04 0.04

Mercury


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 2.2 nmTYCHEM® F 35 77 >480 6 0.26 0.001

Methanol



Methyl-t-butyl-ether



Methyl cellosolve®


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm >480 6 0.27 0.001TYCHEM® F 77 >480 >480 6 0.004 0.002

Methyl chloride



Methyl ethyl ketone


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F imm 3 >480 6 0.42 0.001

Methyl isocyanate



Methyl mercaptan



Hydrogen peroxide (70%)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F imm imm imm – >0.11 0.003

Hydrogen phosphide


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 440 nm 440 5 30 nmTYCHEM® F nt nt nt – nt nt

Iodine



Isopropyl alcohol



Kerosene (Jet A fuel)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F >480 >480 >480 6 >0.65 0.65

Lupranate (MDI)


TYVEK® (style 1422A) imm imm imm – 10.2 0.05TYCHEM® C 100 100 >480 6 0.8 0.1TYCHEM® F >480 >480 >480 6 <0.1 0.1

Mercuric chloride sat. solution



Methyl methacrylate

14


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 18 0.001TYCHEM® F >480 >480 >480 6 <0.001 0.001

Nitrobenzene


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 15 15 15 – 4.1 0.1TYCHEM® F nt nt nt – nt nt

Nitrochlorobenzene o-


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 2.3 0.1TYCHEM® F nt nt nt – nt nt

Nitrochlorobenzene p-


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F 1 14 14 1 >0.2 0.01

Nitrogene dioxide



Nitromethane


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 14 0.1TYCHEM® F nt nt nt – nt nt

Nitrotoluene p-


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 348 350 >480 6 0.2 0.04TYCHEM® F nt nt nt – nt nt

Oleum (40% free SO3)



Methyl vinyl Ketone



Methyl -2-pyrrolidone n-


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F nm nm 36 2 nm 0.02

Methylene bromide


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F 3 5 8 – 8 0.001

Methylene chloride



Naphthalene


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F 14 14 14 1 >50 0.1

Nitric acid (>90% fuming)


TYVEK® (style 1422A) 55 80 80 2 4.6 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Nitric acid (30%)

Permeation data



TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C 240 >480 >480 6 0.01 0.01TYCHEM® F >480 >480 >480 6 nm 0.01

Nitric acid (70%)

15



Phosphorus oxytrichloride



Phosphorus trichloride



Polychlorinated biphenyl (PCB) in transformer oil


TYVEK® (style 1422A) >480 >480 >480 6 <0.001 0.001TYCHEM® C >480 >480 >480 6 <0.1 0.1TYCHEM® F >480 >480 >480 6 <0.1 0.1

Potassium chromate (saturated salt solution)


TYVEK® (style 1422A) 190 >480 >480 6 >0.07 0.07TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Potassium cyanide (saturated salt solution)



Potassium cyanide (10%)


TYVEK® (style 1422A) 133 340 >480 6 0.26 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Potassium hydroxide (40%)



Propylene oxide 1,2-



PCB gas condensate


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – high nmTYCHEM® F imm 30 >480 6 0.32 0.001

Petrol, leaded



Petrol, unleaded


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm nm – nm nmTYCHEM® F 182 238 280 5 4 0.001

Phenol (85%)



Phosgene


TYVEK® (style 1422A) >480 >480 >480 6 nm 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Phosphoric acid (50%)


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C >480 >480 >480 6 <0.1 0.1TYCHEM® F >480 >480 >480 6 <0.1 0.1

Phosphoric acid (85%)


TYVEK® (style 1422A) >480 >480 >480 6 <0.001 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Sodium acetate (saturated salt solution)

16



Sodium hypochlorite (30% Chlorine)



Styrene


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – >29 0.14TYCHEM® F 38 38 55 2 2.0 0.34

Sulphur dioxide


TYVEK® (style 1422A) >480 >480 >480 6 0.004 0.001TYCHEM® C >480 >480 >480 6 nm nmTYCHEM® F nt nt nt – nt nt

Sulphuric acid (16%)


TYVEK® (style 1422A) 230 >480 >480 6 0.012 0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt



TYVEK® (style 1422A) nt nt nt – nt nt TYCHEM® C >480 >480 >480 6 nd nmTYCHEM® F nt nt nt – nt nt






TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt – – nt ntTYCHEM® F >480 >480 >480 6 <0.1 0.1




Sodium cyanide (45%)



Sodium fluoride (saturated salt solution)


TYVEK® (style 1422A) >480 >480 >480 6 <0.001 <0.001TYCHEM® C nt nt nt – nt ntTYCHEM® F nt nt nt – nt nt

Sodium hydroxide (40%)



Sodium hydroxide (50%)



Sodium hydroxide conc.


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C >480 nm >480 6 nm nmTYCHEM® F nt nt nt 6 nm nm

Sodium hypochlorite (5.25% Chlorine)



Sodium hypochlorite (12% Chlorine)

Permeation data


17



Trichloroacetic acid



Trichloroacetone 1,1,3-



Trichlorobenzene 1,2,4-


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – high nmTYCHEM® F nt nt nt – nt nt

Trifluoroethanol 2,2,2-



Trimethyl chinon



Vinyl acetate


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C nt nt nt – nt ntTYCHEM® F imm >480 >480 6 0.02 0.001

Vinyl chloride



Xylene (iso-mix)






Tetrachlorobiphenol 2,2’, 6,6’-



Tetrachloroethylene


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 183 nmTYCHEM® F 103 464 >480 6 0.12 0.001

Tetrahydrofuran



Toluene


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 42 nmTYCHEM® F 376 >480 >480 6 0.037 0.001

Toluene 2,4- diisocyanate


TYVEK® (style 1422A) nt nt nt – nt ntTYCHEM® C imm imm imm – 1 0.03TYCHEM® F >480 >480 >480 6 <0.001 0.001

Toluidine o-

18

Electrostatic charging and grounding

The charging of fabricsThe rubbing of a synthetic material such as TYVEK® against the skin or undergar-ments is sufficient to permit electrostatic charges to build up on the fabric. The charge dissipation via a tiny spark from a coverall to a surface of opposite electrical potential in a flammable environment can cause an explosion!

Adding a conductive coating or anti-static finishing treatment to the fabric helps prevent charge accumulation. Such finishes usually function by absorbing moisture from the surrounding air. By absorbing moisture, the treatment becomes charge dissipative. If the coverall and wearer are connected to an earthed surface, the electrostatic charge is carried away through the coating to the ground (see figure 6).

Basic safety rules for the grounding of the complete range of TYVEK® garmentsGarments must be correctly and contin-uously grounded via conductive safety shoes, floor and/or grounding cable. If the wearer of an antistatically coated garment is not connected to a grounded surface, the wearer/garment will remain charged.

Electrostatic charges may also build up on ancillary equipment. Breathing appa- ratus and other devices must therefore be separately grounded when being worn in conjunction with a garment from the TYVEK® range of coveralls.

Garment is only part of total PPE solu-tion. An antistatic protective garment is not enough to keep safe under certain dan-gerous working condition. End-user shall evaluate what kind protective garment is needed.

Like most finishes of this type, the anti-static finish applied to the TYVEK® range of garments works through moisture absorption. Attention must be paid to the

local humidity levels. In extremely dry environments with a relative humidity below 25%, the antistatic finish may no longer function effectively.

Special safety precautions for grounding TYCHEM® C and TYCHEM® FBoth TYCHEM® C and TYCHEM® F fabrics have an antistatic treatment applied to the inside white TYVEK® surface of the fabric and meet the electrostatic charging performance criteria for non-homogenous materials (EN 1149-1). The outside surfaces of the fabrics are not antistatically treated.

DuPont sponsored tests at DMT and BTTG laboratories confirmed that while the antistatic treatment of TYCHEM® C and TYCHEM® F limits to a large extent the electrostatic charging of the fabric, it can not totally prevent it.

Electrostatic discharging which may occur does not create sparks with enough energy to ignite organic gas/air or solvent/ air mixtures providing special precautions are taken to continuously ground the inside white surface of the coveralls either via conductive safety shoes/floor system and/or a grounding cable.

When properly and continuously grounded, the antistatic properties of TYCHEM® C and TYCHEM® F fabrics are such that any electrostatic discharges which may occur are of insufficient energy to ignite gas/air or solvent/air mixtures.

TYVEK®, TYCHEM® C and TYCHEM® F coveralls are not recommended for use in very sensitive flammable atmospheres such as hydrogen atmospheres (>4% hydrogen in air) and oxygen enriched atmospheres.

The results for the electrostatic proper-ties of TYCHEM® C and TYCHEM® F fabrics were determined by BTTG UK Ltd. (British Textile Technology Group) at 23°C ± 1°C and at 25% ± 1% relative humidity.

Fig. 6

Untreated garment not grounded

Antistatically treated garment but not grounded

Antistatically treated garment and grounded

Table 5

Test results according to EN 1149-1 performed at a relative humidity 25% ± 1% and at 23°C ± 1°C.

EN 1149-1 TYVEK® TYVEK® TYCHEM® C TYCHEM® C TYCHEM® F TYCHEM® F (style 1422A) (style 1422A) inside white polymer coated inside white outside laminated rib surface smooth surface surface outside surface surface surface

Surface resistivity 4.8 x 10 9 1.7 x 10 10 4.0 x 10 9 > 1 x 10 13 5.9 x 10 9 > 1 x 10 13

(Ohm)

Antistatic treatment Yes Yes Yes No Yes No

19

Table 5

Test results according to EN 1149-1 performed at a relative humidity 25% ± 1% and at 23°C ± 1°C.

EN 1149-1 TYVEK® TYVEK® TYCHEM® C TYCHEM® C TYCHEM® F TYCHEM® F (style 1422A) (style 1422A) inside white polymer coated inside white outside laminated rib surface smooth surface surface outside surface surface surface

Surface resistivity 4.8 x 10 9 1.7 x 10 10 4.0 x 10 9 > 1 x 10 13 5.9 x 10 9 > 1 x 10 13

(Ohm)

Antistatic treatment Yes Yes Yes No Yes No

Key: ✓ = Garment can be worn in this environment ✗ = Garment not recommended for use

* For personal protection against organic chemicals TYCHEM ® F garments should be considered

Environment TYVEK® TYCHEM® C TYCHEM® F

Non explosive ✓ ✓ ✓

Explosive ✗ ✗ ✗Relative humidity <25%

Dust explosive atmospheres ✓ ✓ ✓Relative humidity >25% Continuously ground the garment by: Continuously ground the garment Continuously ground the garment

inside surface by: inside surface by:

Wearing conductive shoes and Wearing conductive shoes and Wearing conductive shoes and Walking on grounded floor and Walking on grounded floor and Walking on grounded floor and Connect garment to shoes Connect garment inside surface Connect garment inside surface to shoes to shoes

or or or Attach grounding cable Attach grounding cable Attach grounding cable to garment to garment inside surface to garment inside suface

Explosive organic and inorganic ✓* ✓* ✓gases and vapours Continuously ground the garment by: Continuously ground the garment Continuously ground the garment

Relative humidity >25% inside surface by: inside surface by:

Wearing conductive shoes and Wearing conductive shoes and Wearing conductive shoes and

Walking on grounded floor and Walking on grounded floor and Walking on grounded floor and Connect garment to shoes Connect garment inside surface Connect garment inside surface to shoes to shoes

or or or Attach grounding cable Attach grounding cable Attach grounding cable to garment to garment inside surface to garment inside suface

Very sensitive flammable atmospheres ✗ ✗ ✗ e.g. hydrogen atmospheres (> 4% hydrogenin air) and oxygen enriched atmospheres

20

Chemical protective clothing “Types”

According to European Standards, chem-ical protective clothing is subdivided into six levels or “Types“ of protection. In order to be certified as offering a particular “Type“ of protection the fab-ric's physical and barrier properties must meet minimum performance requirements.

Additionally, for protection levels of Types 3, 4, 5 & 6, the whole suit itself must be tested to a minimum of one of the whole suit “Type” tests and pass a dynamic movement test. TYVEK®, TYCHEM® C and TYCHEM® F models typically surpass the minimum

performance requirements specified in the European standards.

The following table is a summarized description of the conditions of the whole suit “Type” tests (Types 3 through to 6 only).

DuPont European Test Description of the test methodPictogram standard name and test conditions

Type 3 EN 14605 Liquid jet test

This test involves exposing a whole suit to a series of short jets of a water based liquid (with a low surface tension of 30-35 mN/m) aimed at various critical parts of the suit. The pressure of the jet when leaving the firing nozzle is 3 bar and the firing nozzle is situated at a distance of 1m away from the garment.

The liquid is coloured, so that any inward leak-age will visibly stain the undergarment. A suit has passed the test when the total stained area on the undergarment is smaller than three times the calibration stain. (The calibration stain is the stain area produced by 0.02 ml of the test liquid.)

Type 4 EN 14605 Spray test

This test involves exposing a whole suit to an intense spray of a water based liquid (with a low surface tension of 30-35 mN/m). A total quantity of 4.5 litres is sprayed as an aerosol for one minute. There is no pressure exerted by the fine spray on the suit. While being sprayed, the wearer of the suit will perform gentle movements while rotating.

The liquid is coloured, so that any inward leakage will visibly stain the undergarment. A suit has passed the test when the total stained area on the undergarment is smaller than three times the calibration stain. (The calibration stain is the stain area produced by 0.02 ml of the test liquid.)

Type 5 Draft testEN 13982 method A

Particle

test

This test involves exposing a whole suit to coloured epoxy coated polyurethane resin particles. The particle size distribution ranges from 5 to 100 microns, with an average of 25 microns. The particles are electrostatically charged and are attracted to the wet undergarment worn by the grounded wearer. 45 g of test dust are sprayed over the suit during one minute while the wearer gently moves.

Any inward leakage will visibly stain the undergarment. A suit has passed the test when the total stained area on the undergarment is smaller than 3 times the calibration stain area generated by 20 mg of the test dust.

Draft test EN 13982 method B

Particle

test

This test involves exposing a whole suit to a dry aerosol of sodium chloride. The particle size is 0.6 µm. While being exposed to the dry aerosol, the wearer of the suit performs the following sequence of movements: 9 minutes standing, 9 minutes walking, 9 minutes squatting. The total inward leakage is expressed as a

percentage of the concentration of sodium chloride outside the suit. In order to pass the test the proposed total inward leakage must be less than 30%.

Type 6 EN 468 modified byprEN 13034

Low level spray test

This test is essentially the same as the Type 4 spray test however the liquid now has a slightly higher surface tension of 57 mN/m and the quantity sprayed is reduced to 1.9 litres.

Chemical protective clothing

Storage and shelf life Disposal

21

The range of TYVEK® garments should be stored according to customary storage practices. Store in a dry location and avoid direct contact with sunlight for prolonged periods.

The projected shelf life of TYVEK® (style 1422A), TYCHEM® C and TYCHEM® F fabrics based on accelerated ageing tests according to ASTM 573-88 conducted at 100 °C and 100 psi is 5 years.

Coveralls contaminated with hazardous materials should be treated as hazardous waste and be disposed of according to national regulations applying to the nature of the contamination.

TYVEK® is made of pure high density polyethylene and does not contain halogens in its structural formula. Depending on the chemical nature and the amount of contamination on the garments, TYVEK® garments could be incinerated after use without harming the environment, or they may be buriedin a responsible way.

TyvekDuPontTM

Tychem

DuPontTM TYVEK® / DuPontTM TYCHEM®

CHEMICAL PROTECTIVE CLOTHING

TECHNICAL HANDBOOK

DPP-071 03/2007 HK

Copyright © 2007 DuPont. All rights reserved. The DuPont Oval Logo, DuPontTM,The miracles of scienceTM, TYVEK® and TYCHEM® are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.

DuPontTM TYVEK DuPontTM TYCHEM - Global · PDF fileFabric particle barrier Protection against blood and blood-borne pathogens Particle barrier is measured by exposing a fabric to a

Documents