Tyvek®andTychem® ProtectiveClothing
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Tyvek®andTychem® ProtectiveClothing - 1

Tyvek®andTychem® ProtectiveClothing TechnicalHandbook

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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 Howto 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 Contents

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2 Fabric physical properties MD = Machine Direction XD = Cross Direction NT = Not Tested N/A = Not Applicable * Tyvek® (style 1431N) can be colour printed. Some of the property value of coloured Tyvek®may differ slightly fromthose shown forwhite Tyvek® (style 1431N). Flammability Tyvek®(style 1431N), Tychem® C and Tychem® F fabrics are not flame resistant and should not be used close to fires, sparks, flames or sources of intense heat. Tyvek® (style 1431N)melts at 135°C. The polymer coatings on Tychem® C and Tychem® Fmelt at 98°C. Property Testmethod Tyvek®1431N Tychem®C Tychem® F Abrasion...

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Fabric particle barrier Protection against blood and blood-borne pathogens Particle barrier ismeasured by exposing a fabric to a particle challenge and then determining the penetration of particles through the fabric bymeans of a particle counter. The particle counter determines the number of particleswhich have penetrated through the fabric per defined size range (see figure 1). In the absence of a European test method for particle barrier of breathable fabrics for protective clothing, DuPont has measured the particle barrier of Tyvek® (style 1431N) to Aloxite dust according to a proposed...

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4 Liquid chemical penetration and repellency data Liquid chemical penetration is a physical processwhereby a liquid penetrates a fabric by passing through pores or holes in the fabric. The European standard EN368 (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 linedwith an absorptive fabric. 10ml of liquid is poured in 10 seconds onto the top of the test fabric via a nozzle. Any liquidwhich penetrates the fabric via the fabric...

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5 Chemical permeation What is permeation? Permeation is the process bywhich a hazardous liquid chemicalmoves through a protective clothing fabric on amolecular level. Permeation can be represented by the following simplified diagram (see figure 3). Measuring permeation The 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 have been conducted following the ASTMF739, EN369, EN374-3 or ENISO 6529 (method A or B) testmethods....

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6 Actual breakthrough time The average time elapsed between initial contact of the chemicalwith 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 >480minutes and a permeation rate of “nd” (not detected) does notmean breakthrough has not occurred. Itmeans that permeationwas not detected after an observation time of eight hours. Permeationmay have occurred, but at a rate less than theminimumdetectable permeation rate (MDPR) of the analytical device.MDPR can vary depending on the chemical or on the...

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Chemical permeation data Physical state The phase of the challenge chemical during the test being reported: Solid Liquid Gas CAS no. Chemical Abstract ServiceNumber. The number is unique for each chemical. Definition of terms 7 All our permeation data are available on ourwebsite at: http://www.dpp-europe.com/Chemicalpenetration- data.html?lang=en

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8 Electrostatic charging and grounding The charging of fabrics The rubbing of a syntheticmaterial such as Tyvek® against the skin or undergarments is sufficient to permit electrostatic charges to build up on the fabric. The charge dissipation via a tiny spark froma coverall to a surface of opposite electrical potential in a flammable environment can cause an explosion! Adding a conductive coating or antistatic finishing treatment to the fabric helps prevent charge accumulation. Such finishes usually function by absorbingmoisture fromthe surrounding air. By absorbingmoisture, the treatment...

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9 ing to EN1149-1 performed at a relative humidity 25%± 1%and at 23°C ± 1°C. Tychem® C Tychem® C Tychem® F Tychem® F insidewhite polymer coated insidewhite outside laminated surface outside surface surface surface 4.0 x 109 > 1 x 1013 5.9 x 109 > 1 x 1013 Yes No Yes No Key: = Garment can beworn 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...

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10 Chemical protective clothing “Types” According to European Standards, chemical protective clothing is subdivided into six levels or “Types“ of protection. In order to be certified as offering a particular “Type“ of protection the fabric's physical and barrier propertiesmustmeet minimumperformance requirements. Additionally, for protection levels of Types 3, 4, 5&6, thewhole suit itself must be tested to aminimumof one of thewhole suit “Type” tests and pass a dynamicmovement test. Tyvek®, Tychem® C and Tychem®Fmodels typically surpass theminimumperformance requirements specified in the...

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Storage and shelf life Disposal The range of Tyvek® and Tychem® garments should be stored according to customary storage practices. Store in a dry location and avoid direct contactwith sunlight for prolonged periods. The projected shelf life of Tyvek® (style 1431N), Tychem® C and Tychem® F fabrics based on accelerated ageing tests according to ASTM573-88 conducted at 100°C and 100 psi is 5 years. Tyvek®, Tychem® C and Tychem® F do not contain any halogenated compounds, and thereforemay be incinerated or buried in a controlled landfill. Contaminated garments should however be disposed of in...

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