Document nmBZr1wLO15wder7mnYb4Qkp8
FILE NAME Manville JMA
DATE 1966 Dec 30 DOC JMA067
DOCUMENT DESCRIPTION Report - Brake Decomposition Products
eta > Uteek yah Saved ay BE Mart
tg
;
;
Nescane ge ders ind SA toe yh
Thm owe
on utene Research iieteha: bags
Hy eh eR,
he. gph ved ae Med
twat, fae a
ad
ha ete thse il
ye,
5, eet? tote
otto.
de cepthe our race
yh
oe
sos
ars
*s dt i
Ct as ad.
male, Bye "oes
:oe SAD
and
guineas re Ye "gst $e 1966 cht es
ote
|
re Agee en sare pk gay Nyt ape
Engineering Center
ey Se December 30
be
traeti
fs
a,
for empe -$
** Koch Sant infetrdfeet ae G.
meetingon asbestosand During a recent
health at the Public Health Service
_ I learned that the Public Health Service had performed brake wear studies
dynamometer equipment at the American Brake Shoe Company in
utilising Mahwah New Jersey These data were reported on April 8 1966 to the
Studies 7Assistant to the Chief for Spidemiology and Field
Department of
- Health by Jeremiah Ignah Senior Banitary Engineer Engineering Bection
>. Research and Technical Services Branch Briefly the results showed
practically se fiber in the
t
decomposition up to
, mierograph
oo oe pnts
product at test temperatures
Bample evaluation was by electrom
thetest temperature When
approximated 700F in called panic stops
the overload condition apparently deteriorated the resin bond permitting
. fibte o r be riop ut op f the e brd ake ins of bt eina g von rn od ff
Approximately 15 per cent of the fiber was visible in this decomposition
The results sumarized below " material
are7m ron inks 7 ty
wooo,
. aks
8
4 sc s.
cCiotnydition normal Type of Brake
Test
*
Per Cent Fiber
. Disc brake
driving
less than %
^'
;
an Bus brake 1"
0
mamlal city driving Auto brak 4...
Auto brake
600-700F Auto bruke =~o
*n ; | 600-700F
0 few fibers
less than 15 .
15
on Auto clutch -
mal city driving
)
brake
Dus Auto bruke
Aute brake
Bus broke
tie 450-5508
04 / -*-, 400-6007
:
100-3001
450-5508
0
_
~~0 few fibers 0
oy.
i
4
tee
r
PRODUCED
J-M 83
)
Mr. Lynch believes that the results clearly indicate that wear of brake
Linings is not a significant factor in contributing fiber to the atmosphere
Be intends to publish his data as a brief note very shortly
I have invited ;
him to visit the Research Center to review our results with you and have
indicated that we would give him permission to quote our figures
I believe that publication under the suspices of a government would be far more beneficial than by Hanville I shall
as soon as a firm date has been established for this visit zarey SKUUN47 100px
Public Health Service
laboratory
notify you
{
Rouvtaete nweest meet Det e:e
" '
a
. i
C. H
Reet eat
bea <r, needa ed
MLN .
:
eh Pak!
be ee hedge
os,
Se
ye
.
@.
*
me
whoa 1 cope
em
ore Paritgtbah tpa* a*
an
1
el e Parit SOL fsador otk : .
@
,
..BS 19 . a . Sar
19
5 bey
eee
Lo lapeleng Beach
Tete ry
,
ene 001. eyes
L.
Pundeck
Pundeck
L. Pundeck oe 001. F. -
V. C. Streib
Aeoraserises ey oe
te Saple o i
J. P. Leineweber
Sp hears
Attn 0 Melnsebussel 1 moey
s
eect . "se
he e.
Bue IT.
Bae,
.
'
the
most
pu t most of the 1
a:
{
oR peg aha ery erp e 1 bate.
1
ot@iay
a
e
! 1
.f
~
Roe
afios -
ee
row
ar
1
ray,
Soe
:
im aS
:
ca aE
Gt...
.
wsyer: cots ue
Pa
Peestr, giv ger:
134 879
800.70 800.70 * nl ef's
1529985 1529985 1529985
60: 63603077
100-3035 100-3035
58 5810-305
e
PRODUCED