Tiêu chuẩn iso 12625 5 2016

© ISO 2016 Tissue paper and tissue products — Part 5 Determination of wet tensile strength Papier tissue et produits tissue — Partie 5 Détermination de la résistance à la rupture par traction à l’état[.]

Tissue paper and tissue pr oducts —

Part 5:

Pa ier tissue et produits tissue —

Partie 5: Déte mination de la résista c à la ru tur p r traction à

l’état h mide

S con edition

2 16-1 -0

Refer ence n mb r

ISO 1 62 -5:2 16(E)

COPYRIGHT PROTECTED DOCUMENT

© ISO 2016, P blshed in Sw itz rlan

A ll rig hts r eserved Unles otherw ise spe ified, nopar of this p blc tion ma y be r epr od c d or utilz d otherw ise in an form

or b an me ns, ele tr onic or me hanic l, inclu in p oto opying , or postin on the internet or an intranet , w ithout prior

written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

the r eq eser

ISO c pyrig ht ofic

C de Blan on et 8 • C 4 1

CH-1 14 Vernier, Geneva, Sw itzerlan

Tel + 12 7 9 011

F reword i v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms an definitions 1

4 Principle 2

5 A pparatus 2

6 Co ditioning 5

7 Preparatio 5

7.1 General

5 7.2 A cc lerated ag eing (curing ) 5

7.3 Dimensions 6

7.3.1 Ve tical tes ing a p ratus 6

7.3.2 Horizontal tes ing a p ratus 6

7.4 Numbe of tes pie es 6

8 Proc ed re .6

8.1 Calbration an adjus ment of the tes ing a p ratus 6

8.2 Ve tical tes method 7

8.2.1 Mou ting the Finch Cup so king devic 7

8.2.2 Measur ement 7

8.3 Horizontal tes method 8

8.3.1 Measur ement 8

9 Calculation 9

9.1 General 9

9.2 Wet tensie s r eng th 9

9.3 Wet tensie s r eng th r etention 1

10 Test rep r t 10

A nne x A (informative)Precisio 11

Biblog raphy 15

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

For an ex lanation on the meaning of ISO spe ific t erms an ex r s ions r lated to conformity as es ment,

as wel as information a out ISO’s adhe enc to the Wor ld Trade Org nization (WTO) principles in the

Te h ical Bar ie s to Trade (TBT) se the folowing URL: www.iso.org/ iso/for word.html

This document was pr p r d b the Euro ean C mmitt ee for Stan ardization (CEN) Te h ical

Committ ee CEN /TC 1 2, Pulp, p pe a d b ard, in col a oration with ISO Te h ical C mmitt ee TC 6,

Pa e , b ard a d p lps , Subcommitt ee SC 2, Tes t meth ds a d q alt y s pec ific atio s fr p pe a d b ard,

in ac ordanc with the Agr ement on t echnical co pe ation betwe n ISO an CEN (V ienna Agr ement)

This se on edition canc ls an r plac s the f irs edition (ISO 1 6 5-5:2 0 ), w hich has be n

t ech icaly r vised with the folowing chang es:

a) in Cla use 7, a mor detaied desc iption of the pr paration of thet es pie es was inclu ed;

b) in Cla use 8, the proc d r for measur ment was clarif ied;

c) in Cla use 1 , ad itional information is t o be inclu ed in the t es r p rt ;

d) mor detaied pr cision data in An ex A;

e) this document has be n edit orialy updat ed

A l s of al p rt in theISO 1 6 5 se ies can be fou d on theISO websit e

Tissue paper and tissue products —

Part 5:

This document spe if ies a t es method for the det ermination of the wet t ensie s r ngth of tis ue pa e

an tis ueprod ct aft er so king with wat er, using a t ensi e-s r ngth-t es ing a paratus o e ating with

a cons ant rat e of elong tion

Cur ently, two ty es of t ensi e-s r ngth-t es ing a p ratus ar comme cialy a aia le, one w he e

the t es pie e is p sitioned ve ticaly an , for the othe , horizontal y This document a ples for b th

F or ve tical t ensie-s r ngth-t es ing a p ratus, a devic w hich is held in the lowe grip of the t ensi

e-s r ngth-t es ing a p ratus, caled a Finch Cup, is used t o achieve the wet ing F or horizontal t ensi

e-s r ngth-t es ing a p ratus, the so king devic is plac d betwe n the clamps

In cases w he e impurities an contraries ha e t o be det ermined, ISO 1 7 5

[6]

a ples for these

det ections in tis ue pa e an tis ue prod ct

2 Normati ve r eferences

The folowing document ar r fe r d t o in the t ext in such a wa that some or al of their cont ent

cons itut es r q ir ment of this document F or dat ed r fe enc s, only the edition cit ed a ples F or

un at ed r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment ) a ples

ISO 1 6, Pa e a d b ard — S mpln to dete mine a e a e q alt y

ISO 1 7, Pa e , b ard a d p lps — Sta dard atmos phe e fr c onditio in a d tes tin a d procedur fr

mo itorin the atmos phe e a d c onditio in o s amples

ISO 1 24- 2, Pa e a d b ard — Dete min tio o tens ile pro erties — Part 2 : Co s ta t rate o elo g tio

meth d (2 mm/min )

ISO 7 00-1, Metal c materials — Calbratio a d verific atio o s tatic u iax ial tes tin machines — Part 1:

Tens ion/c ompr s s ion tes tin machines — Calbratio a d ve ific atio o the frc e -meas urin sys tem

3 Terms and definitions

For the purp ses of this document, the t erms an definitions given in ISO 1 6 5-1 an the folowing a pply

ISO an IEC maintain t erminolo ical data ases for use in s an ardization at the folowing ad r s es:

— IECEle tro edia: a aia le at ht p:/ www.ele tro edia.org

— ISO Onlne brow sing plat orm:a ai a le at ht p:/ www.iso.org o p

3.1

wet tensie strength

ma imum t ensie for e pe u it width that a t es pie e so ked with wat er wi withs an befor

br aking in a t ensie t es

Note 1t o entry: T e wet ensile strength is e pres ed in newtons per metre (N/m)

wet-tensie-strength retentio

ratio, ex r s ed asa pe c ntag e, of the t ensie s r ngth of the wet t es pie e t o the t ensi e s r ngth of a

dife ent t es pie e from the same sample in the dry, con itioned s at e

Not e 1t o entry: A ccording to ISO 1 7

A t es pie e of tis ue p pe or tis ue prod ct of given dimensions, so ked in wat er for a given pe iod of

time un e spe ified con itions, is s r t ched (elong t ed)t o br ak at a cons ant rat e of elong tion, using

a t ensie-s r ngth-t es ing a p ratus that measur s an r cords the t ensie for e as a fu ction of the

elong tion of the t es pie e

The t es can be car ied out b a ve tical or a horizontal t ensie-s r ngth-t es ing a p ratus

In orde t o wet the t es pie es for a ve tical t ensi e-s r ngth-t es ing a paratus, a devic caled a Finch

Cup, w hich is held t o the lower clamp, is used F or a horizontal t ensie-s r ngth-t es ing a paratus, a

so king cup is inse t ed betwe n the clamps

From the wet t ensie s r ngth an the t ensie s r ngth of the same sample in the dry con itioned s at e,

the wet-t ensi e-s r ngth r t ention can be calculat ed

Pr cision data ar a aia le in An ex A

5.1 Vertical tensie-str eng th-testing ap aratus

5.1.1 Tensie-streng th-testing apparatus

The t ensie-s r ngth-t es ing a p ratus shal be in ac ordanc with ISO 1 24- 2 It is ca a leof s r t ching

a t es pie e of tis ue p pe or tis ue prod ct of given dimensions at a cons ant rat e of elong tion of

(5 ± 2)mm/min, an r cording thet ensi e for e as a function of elong tion on a s rip chart r corde or

any eq iv lent devic

The for e-measuring sy st em shal measur lo ds with an ac uracy of ± % of the r ading or ± ,1 N,

w hicheve is gr at er, and shal be calbrat ed an ve ified ac ording t o the r q ir ment of ISO 7 0 -1

5.1.2 Tensie-testing apparatus clamps

The t ensi e-s r ngth-t es ing a paratus (5.1.1) shal ha e an up e clamp with a minimum of 5 mm

width, for holding b th en s of the t es pie e f irmly an without slp ag e To avoid dama ing the t es

pie es, the clamp surfac s that t ouch the pie es should be smo th an ha e rou ded edg es, i.e fr e

from bur s The lowe clamp shal be designed t o grip the Finch Cup so king devic (5.1.3) f irmly The

clamps shal ha e means for adjus ing the clamping for e

During the t es , the up e clamping lne an the Finch Cup so king devic (5.1.3) rod shal be p ralel

t o each othe They shal also be pe pen icular t o the dir ction of the a pled t ensie for e an t o the

length a is of the t es pie e

The dis anc betwe n A an B is the t otal sp n length an shal be (1 0 ± 1) mm The dis anc betwe n

A and B divided b two is the t es sp n length an shal be (5 ± 1)mm

Dimensions in milimetr es

Key

A clamping line on one en of the test piece

B clamping line on the other en of the test piece

Figure 1 — Positio ing of a test piece

5.1.3 Finch C p soaking devic e

A Finch Cup so king devic ( e Figur 2)consis s of a sup ort sy st em that holds a horizontal cy lin rical

rod of (5,0 ± 0,1) mm diamet er, an a pro imat ely 6 mm length, an a wat er containe

The wat er containe shal be cons ruct ed such that it can be mo ed ve tical y and locked in a raised

position In the locked raised p sition, the wat er in the containe shal complet ely sur oun the

cy lin rical rod w hich is the eb imme sed in the lq id t o a depth of (2 ± 1) mm, as in icat ed in

Figur 2

Proje ting downwards, from the bott om of the devic , is a rigid metal t ongue b means of w hich the

devic can be held in the lowe clamp of the t ensie-s r ngth-t es ing a paratus

Dimensions in milimetr es

Key

1 liq id levelmark

2 positioning g r oove

3 r od, d (5,0 ± 0,1)mm

4 water container (mova le)

5 tong ue

Figure 2 — Finch Cu soaking device (example)

5.2 Horizo tal tensie-streng th-testing apparatus

5.2.1 Tensie-streng th-testing apparatus

Thet ensie-s r ngth-t es ing a p ratus shal be in ac ordanc with ISO 1 24- 2 It is ca a leof s r t ching

a t es pie e of tis ue p pe or tis ue prod ct of given dimensions at a cons ant rat e of elong tion of

(5 ± 2) mm/min, an r cording the t ensie for e as a function of elong tion on a s rip chart or any

eq iv lent devic

The for e-measuring sy st em shal measur lo ds with an ac uracy of ± % of the r ading or ± ,1 N,

w hicheve is gr at er It shal be calbrat ed and ve if ied t o con rm the r q ir ment of ISO 7 00-1

5.2.2 Tensie-testing apparatus clamps

The t ensie-s r ngth-t es ing a p ratus shal ha e two clamps for holding the t es pie e Each clamp

shal be designed t o grip the t es pie e f irmly along a s raight l ne ac os the ful width of the t es pie e,

without causing any damag e, an shal ha e means for adjus ing the clamping for e The ta le betwe n

the clamps shal be r mo a le

During the t es , the clamping l nes shal be p ralel t o each othe within an angle of 1° The clamping

l nes shal be pe pen icular t o the dir ction of the a pled t ensie for e an t o the long es dimension of

the t es pie e t o the same level of ac uracy

The dis anc betwe n the clamping l nes ( i.e the t es span length) shal be adjust ed t o (1 0 ± 1) mm,

ex cept that a t es sp n length of (5 ± 1) mm shal be used for finished p pe prod ct of w hich one or

b th of the dimensions isinsuff icient t o pro ide a t es pie e of the length r q ir d in 7.3

5.2.3 Soaking devic e

A so king devic can be inse t ed betwe n the clamps of the t ensie-s r ngth-t es ing a p ratus (5.2.2),

as shown in Figur 3

The so king devic ma be eq ip ed with a devic that, betwe n the measur ment , wi l adjus the

wat er t o a cons ant level

5.3 C t ing devic e

The cut ing devic shal be ca a le of r peat edly cut ing t es pie es (5 ,0 ± 0,5) mm wide an at leas

1 0 mm in length, with un amag ed, s raight, smo th an p ralel edg es

Condition the samples ac ording to ISO 1 7 an k eep them in the s an ard atmosphe e throughout

the tes

Con itioning shal be done prior t o the pr paration of t es pie es

7 Preparation

7.1.1 If the tes s ar e being made to ev luate a lo the sample shal be sele ted in ac or danc with

ISO 1 6

If the t es s ar being made on anothe ty e of sample, make sur that the spe imens taken ar

r pr sentative of the sample Each t es pie e shal be fr e from pe forations an fault not normaly

inhe ent t o the tis ue

Han lng of wet samples shal be a oided

7.1.2 F r conve ted tis ue pr od cts, testing shal be done on the pr od ct as r ec ived, r egar dles of

the n mbe of ples which ar e sup led as a prod ct u it Generaly, a sing le finished pr od ct she t is

suita le for use as a tes pie e

7.1.3 Tis ue that has not be n conve ted into a finished pr od ct shal be tes ed as a single ply, u les

othe wise ag reed betwe n the p rties conc rned

7.2 Ac c elerated ag eing (curing )

7.2.1 T e wet s r eng th of tis ue p pe is freq ently en anc d b addition of a wet streng th ag ent A n

ac elerated ag eing with hea also caled curing , is fr eq ently used to develo the ma imum wet treng th

that a tis ue p pe or tis ue pr oduct wil achieve afe a pe iod of natural ag eing at ambient con itions,

which ma y v ry fr om a few da ysto several we ks b sed on the wet s r eng th ag ent used

NOTE T e decision of whether or not to use ac elerated a eing wil b determined by the user of this

document, b sed u on the information a out he tis ue paper or tis ue prod ct sample b ing t ested.A ccelerat ed

a eing is not a req irement of this document, but is an al owed option

The e is no rule for det ermining w hethe t o ra id ag e or not, but the folowing principles ar g ene aly

a pled

7.2.2 Pr od ction tes pie es which ha ve not lef the man facturing environment ar e g eneraly rapid

ag ed To rapid ag e a tis ue p pe or tis ue pr od ct , it is r ecommended to heat it in an o en at (8 ± 2) °C

for 3 min A fte heating , con ition the tes pie e in a s an ard atmospher e at (2 ± 1) °C an (5 ± 2) %

relative h midity for at leas 1 h prior to testing

F or prod ction inspe tions w he e data shal be a aia le q ickly, ac ele at ed ag eing con itions of

(1 5 ± 2) °C for 1 min ma be used

7.2.3 Tes pie es which ha ve be n delver ed into the mar keting chain, an espe ialy those a vaia le

for sale to the ultimate consume , ar e g eneraly not ag ed

It shal be u de st ood that he wet s r ngth of t es pie es aft er ac ele at ed ag eing ma be dife ent han

that w hich wi l be ex e ienc d b the en use of the prod ct

The t es r p rt shal s at e w hethe the t es pie e isra id ag ed or not an , if so, b w hat proc d r

7.3.1 Ver tical testing apparatus

Each t es pie e shal be (5 ,0 ± 0,5) mm in width an at leas 1 0 mm in length F or f inished tis ue

prod ct it ems of ve y short dimensions, cut the long es t es pie e p s ible an r d c the dis anc

betwe n the t op edg e of the rod of the Finch Cup so king devic an the b tt om edg e of the up e

clamp of the t ensi e-s r ngth-t es ing a p ratus from (43,5± 1,0) mm t o (2 ,5 ±1,0)mm

7.3.2 Hor izo tal testing apparatus

Cut t es pie es of (5 ,0 ± 0,5) mm width an , pr fe a ly, a pro imat ely 1 0 mm length, a oiding

pe forations an fault

If the spe imens ar so smal that t es pie es of 1 0 mm length can ot be o tained, cut t es pie es as

long as the spe imens alow an , w hen t es ing these t es pie es, use the ma imum t es sp n that can be

used with se ur clamping

The t es sp n shal be r p rt ed [se Clause 1 e)]

7.4 Number of test piec es

Take at leas 1 spe imens from each sample of tis ue prod ct From each spe imen, cut one t es pie e

in the machine dir ction an one t es pie e in the c os dir ction, making a t otal of at leas 2 t es

pie esfrom each sample of tis ue p pe or tis ue prod ct

8 Proc edure

8.1 Cal bration and adjustment of the testing apparatus

Ensur that the t ensie-s r ngth-t es ing a p ratus is calbrat ed an ve if ied in ac ordanc with the

r q ir ment of ISO 7 00-1

Che k that the clamps ar al gned t o me t the r q ir ment in 5.2.2 Position the clamps such that

the t es span is (1 0 ± 1) mm A djus the rat e of elong tion ( he rat e of separation of the clamps) t o

(5 ± 2) mm/min or the ada t ed dimension, if r q ir d, as s at ed in 7.3.1 or in 7.3.2, r spe tively A djus

the clamping for e in such a wa that the t es pie e does not slp or sufe damag e d ring thet es