Cleanroom Garment - BCW · 2017-09-24 · Cleanroom Garment Contamination Source ... Carsten...
Transcript of Cleanroom Garment - BCW · 2017-09-24 · Cleanroom Garment Contamination Source ... Carsten...
Cleanroom Garment
Contamination Source
“Human”
or how efficient is
Cleanroom Garment
Different aspects around the theme „Cleanroom Garment“
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Speaker: Carsten Moschner
since 1992 active in the segment „Cleanrooms“,et al. in the area Cleanroom Garments
Managing Director of Dastex Reinraumzubehör GmbH & Co. KG
Chairman of the committee of experts inside VDI for the guidelines “cleanroom consumables” (no. 2083 part 9.2) which is available since end of 2016 (garments, gloves, wipers etc.)
Author of different professional articles and chapters in books about cleanroom garments
Reinraumbekleidung
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Summary &
Conclusion
General
Body-Box Testincl. a
live Demo
Cleanroom-suitable
Undergarment
Cleanroom Garment
Cleanroom Garment:
Protection against contamination
released by the wearer
Personal Protection Equipment (PPE):
the wearer has to be protected against
contamination coming from the process
or environment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
The main job of the cleanroom garment is,to protect the product or the processagainst contamination released by humansand their private garment.
[VDI 2083, Blatt 9.2]
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
In this case the cleanroom garment does notbecome a particle source by itself. (Not becauseof aging effects – not because of worse productfeatures.)
In general cleanroom garment can be comparedwith a “filter” � you have to handle it like a filter,you have take care like a filter and if necessaryyou have to change “the filter”.
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
The cleanroom garment are to be understood as a
system where the single parameters can
interact.
care
material properties
environmental conditions
Special workplace
conditionsundergarment
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (our own test facility „in house“ Dastex)
Measurement points are in back air
Cleanroom: ISO 3/ISO 4
Dimensions: 1200 x 1200 x 2400 mm(basic)
Body Box Test
nach
IEST-RP-CC-003.4
Cleanroom Garment
Carsten Moschner ©
Dastex Reinraumzubehör GmbH & Co. KG
FFU / H14
2 Particle Counter
á 28l (1 ft³)
connected to a computer
to transfer the measurement
results incl. the analyses of
the results
Temp. and Humanity.-Sensor
Air Speed:
between 0,33
and 0,45 m/s
Without a person
inside the Body Box
we will reach a cleanliness level
ISO-3 / ISO 4 after 30 min
Body – Box – Test (our own test facility „in house“ Dastex)
Cleanroom Garment
Carsten Moschner ©
Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (our own test facility „in house“ Dastex)
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (our own test facility „in house“ Dastex)
a typical test:
the person enters the „Body-Box“ with different garment systems
and
has to do defined movements in defined time frames
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (our own test facility „in house“ Dastex)
The most important points are during a study “comparing different garment systems in a Body-Box”
You can compare only results from the
same persons
• Because every person does release different numbers of particles
Stabile conditions (humanity, temperature etc.)
• If the temperature is higher the person feels more unhealthy and will release more particle
Enough repeats (to reproduce results)
• Because the measurement results differs very strong – the risk automatically increase to misinterpret these results (based on less repeats)
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (our own test facility „in house“ Dastex)
General questions:
a) How many particles release a person under „normal conditions“?
b) How may particles does a person release in different cleanroom garments?
This was a „goal“ of a study
„in house“ in our own test facility
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Contamination Source: “Human”
Numbers of released particles per minute; „persons warring different garment systems“ in relation to their grade of movement
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Contamination Source: “Human”
Garment
standing walking standing walking standing walking
≥ 0,5 µm ≥ 0,5 µm ≥ 1 µm ≥ 1 µm ≥ 5 µm ≥ 5 µm
Cotton-
Jogging-Suit873.304 34.955.780 657.312 25.114.780 17.077 448.638
Coat 331.742 6.304.946 130.901 2.506.4
95
9.795 101.172
Coverall 28.827 106.328 10.396 32.135 331 851
Numbers of released particles per minute; „persons warring different garment systems“ in relation to their grade of movement
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
„particle trail“ behind a person
TURBULENTair flow(stirring)
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Contamination Source: “Human”
and how does it look like with germs and bacteria?
- in relation to the garment- in relation to the movement - airborne
This was the goal of another study,performed in our own Body-Box,2014, with a new measurement equipment
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Numbers of released germs per minute„Person in different “garment systems“ in relation to the movement
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Contamination Source: “Human”
Measurements with BioTrak from TSI – in a controlled area
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
≥ 1 µm
standing walking
garment particles germs particles germs
coverall 5.350 18 93.125 263
coat 183.672 623 3.560.002 12.492
jogging suit 571.364 1.379 8.430.884 17.887
≥ 5 µm
standing walking
garment particles germs particles germs
coverall 107 2 1.547 36
coat 8.426 373 174.650 6.472
jogging suit 30.659 757 456.802 9.364
≥ 10 µm
standing walking
garment particles germs particles germs
coverall 17 2 132 10
coat 1.344 86 25.879 4.845
jogging suit 5.839 557 76.980 7.364
reduction – particles: 1,10 %reduction - germs: 1,47%
reduction - particles: 0,34 %reduction - germs: 0,39%
reduction - particles: 0,17 %reduction - germs: 0,14%
Numbers of released germs per minute
„Person in different “garment systems“ in relation to the movement
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Detection method used by the Bio Trak counter
Supported by photomultiplier
Spectroscopy= physical method� the weave length of the lightwill be modified � fluorescence
scattered light
Fluorescence AFluorescence B
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Detection method used by the Bio Trak counter
Ex
cit
ati
on
wa
ve
le
ng
th
emission wave length
Laser Induced Fluorescence (LIF)
Viable cell metabolites tryptophan, NADH, and flavin’s
(riboflavin) fluoresce when excited by ultra-violet light
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (our own test facility „in house“ Dastex)
Beside of studies „How many particles does a human release“
you can use the Body Box for example:
As a test facility to control complete garment systems and to
optimize such a system, to compare different system, or to
optimize components of a system
For example: is a complete closed fabric useful? Maybe
through other leaks particles can leave the system garment
and are a high potential risk for the product?
the so called: “Pump Effect”
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (our own test facility „in house“ Dastex)
During different studies it was
proofed, that fabrics with a very
low air permeability release
through other „openings“ much
more contamination, than fabrics
with a middle range air
permeability!
product / process
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Qualitative
representation of the
local particle emission
of a person wearing
conventional cleanroom
garments
Collar area + the part above the facemask – boosted by the „pump effect“
Contamination by breath, in connection to the fit , material and the wearing time of the mask;a big part of the contamination are particles which „pass around“ the mask!
Migration procedures (by friction) + diffusion (air born) through the fabric
Migration procedures (most mechanical stressed area) + zipper
Particle emission from/through the seams
Arm cuffs – boosted by the „pump effect“+ but also from the knitted material added particle release, because the decontamination of the knitted material is much inferior than cleanroom fabric
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
cleanroom suitable undergarmenta major part of the garment system
In the system „Cleanroom Garment“ in many
times end user pay no or only a little attention
to the undergarment (in the most cases normal
street wear), although a huge share of
contamination will be generated by this source
of pollution.
With the help of a defined undergarment it is
easily possible to reduce particles and germs in
the system cleanroom garments.
� At least: 50% !
.
Cleanroom Garment
cleanroom suitable undergarmenta major part of the garment system
study / investigation� subject:particle/ germ releaseby humans with
different undergarment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
cleanroom suitable undergarmenta major part of the garment system
0
50
100
150
200
250
Pers. A Pers. B Pers. A Pers. B Pers. A Pers. B
cfu
per
100 c
m²
Influence of the undergarment on the microbiologicalcontamination of cleanroom garments
Cotton
Light Tech
directly after having having made simulation of
dressed the 1. time several exercises repeated wears
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
cleanroom suitable undergarmenta major part of the garment system
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
> 0,3 µm > 0,5 µm > 1 µm
Cotton, 1. Set, Neck-Level
Light Tech, 1. Set, Neck-Level
Cotton, 1. Set, Working-Level
Light Tech, 1. Set,Working-Level
Influence of the undergarment on the contamination of the cleanroom air
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Contamination Source: “Human”
Garment
standing walking standing walking stand. walk.
≥ 0,5 µm ≥ 0,5 µm ≥ 1 µm ≥ 1 µm ≥ 5 µm ≥ 5 µm
Cotton-Garment 873.304 34.955.780 657.312 25.114.780 17.077 448.638
Coat 331.742 6.304.946 130.901 2.506.495 9.795 101.172
Coverall 28.827 106.328 10.396 32.135 331 851
Coverall +
Undergarment< 14.000 < 50.000 < 5.000 < 16.000 < 150 < 400
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test (other studies done in our test facility)
Comparing different garment systems
like e.g. disposable garments
vs. washable cleanroom
garment
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test / Study „disposable - vs. washable cleanroom garment“
0
100
200
300
400
500
600
700
800
900
material material 1 material material material CR-Fabric CR-Fabric1 laundered 2 3 4 laundered
during walking
No movement
(pa
rtic
les≥ 0
,5 µ
m )
x 1
.00
0
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test / Study „disposable - vs. washable cleanroom garment“
results:
- only pre-laundered disposable garment are recommended to use as standard cleanroom garment
(� but the costs will be much higher)
- between the different basic materials for disposable garments are huge differences in particle shedding / in particle release
- reusable cleanroom garments has to be laundered before they will be used the first time in the cleanroom
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test / Study „disposable - vs. washable cleanroom garment“
0
100
200
300
400
500
600
700
800
900
material material 1 material material material CR-Fabric CR-Fabric1 laundered 2 3 4 laundered
during walking
No movement
(pa
rtic
les≥ 0
,5 µ
m )
x 1
.00
0
Garments, directly from the production � means NOT
laundered
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Body – Box – Test / Study „disposable - vs. washable cleanroom garment“
Disposable garments are produced in non controlled areas without any protection against any contamination
Cleanroom Garment
Carsten Moschner ©
Dastex Reinraumzubehör GmbH & Co. KG
The real numbers of particleshow to calculate the factor:
The problem:We get much more “clean air” through the FFU into the Body Box than a typical particle counter can convert.
Approx. 2000 m³/h (through the FFU � 3,36 m³/h (a particlecounter can collect)
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
The real numbers of particleshow to calculate the factor:
width b 1,2 m
length t 1,2 m
surface A = b x t 1,44 m2
Airflow/airspeed w 0,4 m / s
Quantity of air Vo = A x w x 3600 2073,6 m3 / h
Quantity of air per minute Vo min = Vo : 60
34,56 m3 / min
the volume the particle counter is working VoP
28 l / min
these volume in m3
VoP m3 = VoP : 10000,028 m3 / min
factor F = Vo min : VoP m3 1.212
Cleanroom Garment
Let´s have a look forthe results today, transmitted from Muggensturm?
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Cleanroom Garment
Carsten Moschner ©
Dastex Reinraumzubehör GmbH & Co. KG
summary
The Body Box Test, is still the only actual existing test method to answer questions like:
� does “my” cleanroom garment system work?� how effective is my cleanroom garment system?� does it make sense to change parts of my cleanroom
garment system?� is the cleanroom garment system A better than B
Body – Box – Test (other studies done in our test facility)
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Cleanroom garment as a system
A cleanroom garment system includes beside of
coveralls , hoods etc. also:
Cleanroom Garment
Carsten Moschner © Dastex Reinraumzubehör GmbH & Co. KG
Cleanroom Garment System
Textile characteristics
Process requirements
Wearerissueses
Concept for the changing area
Cleanroom Garment
Dastex Reinraumzubehör GmbH & Co. KGDraisstrasse 23
76461 Muggensturm
Tel.: +49 (0)7222 9696 60e-mail: [email protected]
internet: www.dastex.com
Carsten Moschner
Thank You