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,.,.. .. - ' ' 0 .. /)

Sl Pro pe.rty N o.

i) Hardness, IRHD

ii ) Dim en sio n a lch anges ,perce nt, Macii i) Tensil est reng th , k Pa t iniv ) Com press ibil ity at2 800kPa,percen tv Recovery,pe rce nt, ir t

vi) Com press ionse t, percent, axvi i) Che m ic al te stonwaterextract :

a)pH , w here app licab leb) Chl ori de con tent asch lo rid eion)c)Su lph a te content ssu lp ha te ion

T A B L E I PROPERTIES OFCORKCOMPOSI F ipNSHClauses4, 5, 7 .4 , 7 .5 .2, 7.6 .2 and7.9 .1f

Typ e A TypeB(Non-Oil Res ist ant ) G oo d Oil Resi st ant)RC 50 - A RC70 - A RC80-A RC50-B RC70 -B RC80 B RC

505 70:t5 805 50: t5 705 805

1.5 1.5 15 1.5 1.5 1.5650 900 1250 70 0 1 250 155045 65 30 - 45 15 - 30 45 - 60 35 - 50 25 35 35

80 80 75 80 80 7590 90 90 80 86 905.0 to 8.5 5. 0 to8.60 2 percent ax 0.2pe rcent ax0.2 perce nt ax 0. 2p ercen t ax

Gaske tssuitable for G P * *abbrev ia ti on symbols) G P *Meth ods of test for vul can iz edrubbers: Part l H ardness.t1 kgflcm 2 =98.066 5 kPa*P

= Lig ht ele ctr ica landgen e ra la utom ot ive indus tries

,. G en er al purp oseon ly l=Autom ob ile industry

=Heavy elect ric alin dustr y T

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: 4253 Part II)- 1980.ens ion a l s tab il i ty , resistanceto l iqu ids and chem ical te sts o n water ex trac t . The lo t shall bed confo rming to the above requirements if all the cork composit ion sheets sa t i s fy theevant requirements.

The lot shall be dec lared conformin g to the requirements of this standard if itis foundsfac to ry accord ing to A -2.1, A-2.2 and A-2.3.

EXPLANATORY NOTEThis st andardwasoriginally issued in 1968.Basedo n the experience gained by the useof thisndard,the com m ittee decided to rev ise thisstandard .In this revision:a) d ifferent abbre v ia t ions for the use of particular type and grade of materialhave been

incorp ora ted fo r the b enef i t ofthe cons u m er;andb) rev ised f lu id resistancetest has been inc luded .The materials covered bythis standard are , ingene ra l , stronger and m oreresilient th an therk composition sheetsspecified in Part I ofthis standard and in some cases possess a highsistanceto oil and petro l . Theyare also moreresistance to d im e n s iona l change s undervaryingiccond it ions ofsto rage, but itisrecom m e n d edthatgasketscut fr om these sheet sshouldnotstored under condit ions of hightempera ture and high humidity or stress, or for pe riods whichel ikely to cause de te r io rat io n .This edit ion 2.3 incorporates Amendment No. 1 September 19 87), Amendment No. 2ug ust 1988)and Amendment No.3 N ovem b e r1993). S ide ba rind ica te s m odificationof the textthe resul t of inco rporat io n ofthe amendments.

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