BS EN 15702 2008 ICS 83 100 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Cellular Plastics — Cell count procedure for flexible and rigid polyurethane This Br[.]
Trang 1ICS 8 1 0
Trang 2This Bri sh Stan ar d
was published u der the
authoriy of the Stan ard s
Policy an Strateg y
Commi e on 3 J n ary
2 0
© BSI 2 0
ISBN 9 8 0 5 0 5 9 3 6
Am endments/cor ig enda is ued sinc publ cation
This British Stand rd is the UK implementation of EN 15 02:20 8 It
super edes BS4 4 -1:19 8 which is withdrawn
The UK p rticip tion in its prep ration was entrusted to Tech ical
Commit e PRI/ 24, Testing of rig id and flexible celular materials
A lst of org anizations represented on this commit e can be obtained on
request to its sec etary
This publ cation do s not purport to include al the neces ary prov isions
of a contract User are responsible for its cor ect a plcation
Compl anc with a British Standard cannot confer imm unity
f om leg al o l g ations
Trang 3EU ROPEAN STAN DARD
Decemb r 2 0
ICS 8 10
En ls Version
Cel ular Plastics - Cel count pr ocedure for flexible and rigid
poly urethane
Pla tiq e alv éolair es - Mo e o ér atoire d d n mbreme t
d s alv éole d s p ly uréth n s s u le et ri id s
Sc a mstofe - Verfa ren z r Zele z hlu g für w eic
-ela tis h u d h r te Sc a mstofe a s Poly ur eth n
T his Europ a Sta d rd wa a prov ed b CEN o 15 Nov emb r 2 0
CEN memb rs are b u d to c mply w ith th CEN/CENELEC Internal Re ulatio s whic stip late th c n itio s for giv in this Europ a
Sta d r d th statu of a n tio al sta d rd w ith ut a y alter atio Up-o-d te lsts a d biblo r ap ic l referen e c n er nin s c n tio al
sta d rds ma b o tain d o a plc tio to th CEN Ma a eme t Ce tre or to a y CEN memb r
T his Europ a Sta d r d ex ists in three oficial v er sio s (En ls ,Fr en h, Germa ) A v ersio in a y oth r la g a e ma e b tran latio
u d r th r es o sibi ty of a CEN memb r into its ow n la g a e a d n tifie to th CEN Ma a eme t Ce tr e h s th s me statu a th
oficial v ersio s
CEN memb r s are th n tio al sta d rds b die of Au tri , Belgium,Bulg r i ,Cy prus,Cz c Re u lc, De mar k,Esto ia,Finla d,
Fran e, Germa y , Gree e,Hu g ry , Ic la d,Irela d, Italy , L tv ia,Lith a ia, L x emb urg, Malta, Neth rl n s, Norway ,Pola d, Portu al
Roma ia,Slov akia, Slov enia, Sp in,Swe e , Switz rl n a d Unite K in d m
E U R OP E A N COMMITT E E FO STA N DA R DIZ ATION
COMIT EUROPÉ N DE NORMALISATION
EUROPÄISCHES KOMIT E FÜR N RMUN
Management Cente: rue de Sta s r, 3 B-10 0 Brus els
© 2 0 CEN Al ri hts of ex ploitatio in a y form a d b a y me n res rv ed Ref No.EN 15 0 :2 0 : E
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Foreword
3 1 Sco e 4
2 Terms a d Definit ions 4
3 Apparat us 4
4 Te t spe ime s
4 4.1 Prepara on 4
4.2 Sh pe a d dime sions 4
4.3 Number of t est spe ime s 4
5 Proc d re 4
6 Pre ision 5
6.1 Ge eral 5
6.2 R es lts 5
7 Te t rep rt 5
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Foreword
This doc ment (EN 15 0 :2 0 ) has b en pre ared by Tec hnic al Commit t ee CEN/TC 2 9 “Plast ic s”, the
secret ariat of whic is held by NBN
This Euro e n St an ard s al b giv en t he st atu of a nat ional stan ard, eit her by publc at ion of an ident ical
t ex t or by en orsemen at t he lat est by Ju e 2 0 , an conflct in national st an ard s al b w it hdrawn at
t he lat est by Ju e 2 0
At t ent ion is draw n to t he p s ibi ty that some of t he element s of t his doc ment may b t he s bject of p t ent
rig t s CEN [an /or CENELEC] s al not b held resp n ible for ident ifyin an or al s c p t ent rig t s
Ac ordin t o t he CEN/CENELEC Internal R eg lat ion , t he national st an ard organiz at ion of t he folow in
cou t ries are b u d to implement t his Euro e n St an ard: Aust ria, Belgium, Bulga a, Cypru , Czec
R epublc, Denmark, Est onia, Finlan , Fran e, German , Gre c e, Hu gary, Icelan , Irelan , It aly, L t via,
Lit huania, Lux emb urg, Malt a, Net herlan s, Norway, Polan , Port ugal, Romania, Slov akia, Slov enia, Sp in,
Sweden, Sw it zerlan an the Unit ed K in dom
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This Euro e n St an ard sp cifies a met hod for det erminin t he cel cou t of flex ible an rigid celular
p ly rethane
2 Terms and Definit ions
F r t he purp ses of t his doc men t he folow in t erm an definit ion a ples:
c l cou t
n mb r of c els p r 2 mm in t he celular p ly ret hane u der sp cified con it ion
3 Apparat us
3.1 The a p rat us s al con ist of a mag ifyin dev ice (of s ficient p w er t o alow iden ficat ion of e c
cel) with a s ale, calbrat ed in mi imet res, ca a le of me s rin a len t h of 2 mm t o an ac urac of at le st
± 0,1 mm A 2 mm clot h-cou t i g glas is normaly adeq at e
3.2 In t he case of very fine celed fo ms o t ical fat ig e may b ex perienc ed an in this ev ent t he u e of a
smaler glas (10 mm or 15 mm) an arit hmet ic con er sion is p rmit t ed
3.3 A X 10 mag ifyin dev ice is adeq ate for a cel cou t of 4 or les
4 Test specimens
4.1 Pre ara on
If t he mat erial s ows a predominant dir ec t ion of t he celular st ruc t ure (orient at ion of t he cels), t he t est
sp cimen s al b c t in s c a w ay t hat b th ax es of t he cels can b me s red
4.2 Sha e and dime sions
The t est sp cimen may con ist of an sample whic is fe of s in an has a plane s rac e large enou h t o
ac ommodat e t he cou tin glas A 5 mm x 5 mm x 3 mm sample is rec ommen ed Samples s al b c t
w it h a s arp blade in s c a man er t hat t he cels are not damaged
Sp cimen s rac es s owin marked v ar i t ion in t he celular st ru t ure fom place t o plac e s al not b
me s red u les sp cificaly req ired
4.3 Number of test spe ime s
Fiv e t est sp cimen s al b u ed
If t here is a notice ble diferen e in t he cel cou t in sp cimen t aken fom diferent loc at ion in t he sample,
t he sp cimen locat ion s al b as agre d up n by t he int erest ed p rties
5.1 L y the test sp cimen on a flat horizont al s race, w it hout st rain Plac e the cou t i g dev ice on t he
s race of t he t est sp cimen an c ou t t he act ual n mb r of c els again t t he cou t in ed e of t he glas
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5.2 Where t here is marked anisot ro y in t he cel dimen ion , at le st two cou ts s al b made The
direct ion s al b c osen s c h t hat t he max imum an minimum dimen ion of t he cels are u ed t o p rorm
t his t es
5.3 Some in ivid als can fin it dific lt t o cou t ver y fine celed fo ms Therefore t he to s race of t he
celular st ruc t ure may b lg tly s aded F r u -pigment ed or p le coloured mat erials, a blac felt -t ip ed
marker s ould b u ed The to s rac e of dark coloured fo ms may b lg tly c oat ed wit h w hite typ writer
corect ion fluid Su h fluid do not normaly cau e sw el n or dist ortion of t he celular st ru t ure but s ould b
left t o dry t horou hly b fore t he cou tin proced re is p rormed
6 Precision
6.1 General
The precision of CEN proced re was det ermined in ac ordanc e w it h ISO/TR 9 7 The ITP (Int erla orat or y
t est programme) was con u t ed in 2 0 Six p rt icip nt s fom UK la orat ories t est ed tw o grades of flex ible
p lyest er uret hane fo m Bot h grades w ere w hite (u -pigment ed), Fo m typ “A” w as of fine u iform c el
st ru t ure an Fo m t yp “B” had muc h larger cels Al samples were c t horizont aly fom commercialy
prod ced bloc an w ere cou ted in t w o direc t ion – p ralel t o the ax is of t he fo min conv eyor an at rig t
an les Cel cou t s were p rormed on t wo se arat e day A ll la orat or i s fou d it b neficial t o lg t ly s ade
t he t op layer of cels u in a blac felt-t ip ed marker
6.2 R esults
The precision res lt s for t he t w o mat erials are giv en in Ta les 1 an 2 The n mb r of t est piec es in e c
me s rement was five
Table 1 — Pre ision re ults Foam Ty pe ―A‖
r
S
R
Table 2 — Pre ision re ult s Foam Type ―B‖
r
S
R
7 Test report
The t est re ort s al in lu e t he folow in informat ion:
a) direc t ion(s) in w hic t he cel cou t w as made;
b) av erage n mb r of cels p r 2 mm;
c) p wer of t he mag ifyin device an size of cou tin glas ;
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d) w het her s race s adin w as u ed to as ist t he c ou t in ;
e) an dev iat ion fom t he t est in an con itionin proced res sp cified
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