PUBLIC REVIEW DRAFT DRAFT UGANDA 
STANDARD  
  DUS DEAS 866 
Second  Edition  
2021-mm-dd 
 
 Reference number  
DUS DEAS 866: 2021  
 
© UNBS 2021  
   
Paper sacks for packaging of cement — Specification  
 
 PUBLIC REVIEW DRAFTDUS DEAS 866: 2021  
ii                © UNBS  2021  - All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2021  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 7 333 2 50/1/2 
Fax: +256 41 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 PUBLIC REVIEW DRAFTDUS DEAS 866: 2021  
© UNBS  2021  - All rights rese rved                iii National foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, as amended.  UNBS  is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisati on for Standardisation (ISO);   
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Fo od Standards;  and  
(c) the National Enquiry Point on TBT Agre ement of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Draft Uganda Standard, DUS DEAS 866:2021 , Paper sacks for packaging of cement — Specification , is 
identical with and is being  reproduced fro m a Draft East African  Standard, DEAS 866:2021 , Paper sacks for 
packaging of cement — Specification , and is proposed for adoption  as a Uganda Standard.  
The committee responsible for this document is Technical Committee UNBS/TC 306, Paper and paper 
products . 
This second  edition cancels and replaces the first edition ( US E AS 866:2017 ), which has been technica lly 
revised.  
Wherever t he words, “East African  Standard " appear, they should be replaced by "Uganda Standard."  
  
 
    DEAS 866 :2021  
ICS 85.080.99  
 
© EAC 2021                                                                                                                         Second  Edition 2021  
 DRAFT EAST AFRICAN STANDARD  
Paper sacks for packaging of cement — Specification  
EAST AFRICAN COMMUNITY  
 
 
 
 DEAS 866 :2021  
ii © EAC  2021 – All rights reserved  
 Copyright notice  
This EAC document is copyright -protected by EAC. While the reproduction of this document by 
participants in the EAC standards devel opment process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
any other purpose without prior written permission from EAC.  
Requests for permission to re produce this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the country of the requester:  
© East African Community  2021 — All rights reserved  
East African Community   
P.O. Box 1096 , 
Arusha  
Tanzania  
Tel: + 255 27 2 162100  
Fax: + 255 27 2162190  
E-mail: eac@eachq.org  
       Web: www.eac -quality.net  
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be prosecuted . DEAS 866 :2021  
© EAC 2021 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  2 
4 Types  ................................ ................................ ................................ ................................ ......................  2 
5 Requirements  ................................ ................................ ................................ ................................ .........  2 
5.1 General requirements  ................................ ................................ ................................ ...........................  2 
5.2 Specific requirements  ................................ ................................ ................................ ...........................  2 
6 Packaging  ................................ ................................ ................................ ................................ ...............  3 
6.1 Packaging and labelling ................................ ................................ ................................ ........................  3 
6.2 Labelling  ................................ ................................ ................................ ................................ .................  3 
7 Sampling  ................................ ................................ ................................ ................................ ................  3 
Annex  A (normative)  Requirements the sewing thread  ................................ ................................ ................  4 
A.1 Sewing thread/yarn  ................................ ................................ ................................ ...............................  4 
A.1.1  General  ................................ ................................ ................................ ................................ ...................  4 
A.1.2  Sewing threads made wholly or partly from synthetic fibres  ................................ ...........................  4 
A.2 Coefficient of variation of linear density  ................................ ................................ .............................  4 
A.3 Knots ................................ ................................ ................................ ................................ .......................  5 
A.4 Total length  ................................ ................................ ................................ ................................ ............  5 
A.5 Net mass  ................................ ................................ ................................ ................................ .................  5 
A.6 Breaking tenacity  ................................ ................................ ................................ ................................ ... 5 
A.7 Appearance  ................................ ................................ ................................ ................................ ............  5 
A.8 Surface finish  ................................ ................................ ................................ ................................ .........  5 
Annex  B (informative)  Typical examples of paper sacks  ................................ ................................ ..............  6 
Bibliography  ................................ ................................ ................................ ................................ ........................  8 
 
 DEAS 866 :2021  
iv © EAC  2021 – All rights reserved  
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Community w ill be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standards Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, consumer groups, priv ate sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporated before finalization of standards, in 
acco rdance with the Principles and procedures for development of East African  Standards.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they alwa ys have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC /TC 065, Paper and p aper 
Products.  
Attention is drawn to the possibility that some of the elements of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
This second edition cancels and replaces the first edition (EAS 866:2017), which has been technically revised 
The main changes compared to the  previous edition are as follows:  
— In Table 1, the tensile strength values in both the machine and cross directions for the different grammages 
were  adjusted  
 
 DRAFT EAST AFRICAN STANDARD  DEAS 866 :2021 
 
© EAC 2021 – All rights reserved  1 
 Paper sacks for packaging of cement — Specification   
1 Scope   
This D raft East African Standar d specifies requirements , sampling and test methods  for valve sewn -gusseted 
and valve -pasted ends paper sacks for packaging of cement  
2 Normative references   
The following documents are referred to in the text in such a way that some or all of their conten t constitutes 
requirements of this document.  For dated references, only the edition cited applies. For undated references, 
the latest edition of the referenced document (including any amendments) applies.  
ISO 186, Paper and board — Sampling to determine av erage quality  
ISO 187, Paper board and pulps — Standard atmosphere for conditioning and testing and procedure for 
monitoring the atmosphere and conditioning of samples    
ISO 287, Paper and board — Determination of moisture content of a lot — Oven -drying me thod  
ISO 535, Paper and board — Determination of water absorptiveness — Cobb method   
ISO 536, Paper and board — Determination of grammage   
ISO 1924 -3, Paper and board — Determination of tensile properties — Part 3: Constant rate of elongation 
method (100 mm/min)   
ISO 1974, Paper — Determination of tearing resistance — Elmendorf method   
ISO 2060, Textiles — Yarn from packages — Determination of linear density (mass per unit length) by the 
skein method  
ISO 5079, Textile fibres — Determination of breaking fo rce and elongation at break of individual fibres  
ISO 5636 -3, Paper and board — Determination of air permeance (medium range) — Part 3: Bendtsen method   
ISO 6590 -1, Packaging — Sacks — Vocabulary and types — Part 1: Paper sacks   
ISO 7965 -1, Packaging — Sacks — Drop test — Part 1: Paper sacks   
ISO 8791 -2, Paper and board — Determination of roughness/smoothness (air leak methods) — Part 2:  
Bendtsen method  
ISO 21067 , Packaging — Vocabulary — Part 2: Packaging and the environment terms   
2 © EAC  2021 – All rights reserved  
 3 Terms and definitions   
For the purposes of this standard, the terms and definitions in ISO 6590 -1 and ISO 21067 shall apply . 
4 Types  
4.1 Type 1 shall be valve -sewn -gussetted.  
4.2 Type 2 shall have valve -pasted ends  
5 Requirements  
5.1 General requirements  
5.1.1  The paper sha ll be free from defects, which may adversely affect its serviceability. It shall be free from 
wrinkles, folds, paper dust, tears which have not been glued, stains, prominent marks, slime holes and foreign 
matters.  
5.1.2  The paper sack shall be made of wel l nested plies of paper with matching stretch level. The 
combination of paper in the sack shall give a total tensile energy absorption (TEA) in sack as specified in 
Table 1.  
5.1.3  The sewing thread used shall meet the requirements specified in Annex A.  
5.1.4 In the construction of the sack tube, the outer ply fit shall be such that at the point of manufacture, 
each ply shall be smaller in circumference than the next outer ply within elongation limits of the material in 
order to ensure even distribution be tween plies.  
5.2 Specific requirements  
5.2.1  When tested in accordance with the methods specified in Table 1, the paper sack shall comply with 
the requirements specified therein.  
Table 1 — Specific requirements for paper sacks for packaging of cement  
S/No.  Characteristic  
  Requirements for different grammage  Test methoda  
 i.    Grammage, g/m2, ± 5%  70  75  80  90  ISO 536  
 ii.    Moisture content, %, m/m  6 - 8 ISO 287  
 iii.    Tensile strength, kN/m, min., (MD)  4.2  4.2 4.5 5.0   
  
  
  
  
  
  
ISO 1924 -3  
   iv.    Tensile strength, kN/m,min., (CD)  3.0 3.0 3.0  3.2 
 v.    T.E.A, J/m2, min. (MD)  154  165  165  200  
 vi.    T.E.A, J/m2, min. (CD)  156  175  175  203  
    vii. T.E.A index, J/g, min. (MD)  2.26  2.12  2.12  2.27  
    viii. T.E.A index, J/g,,min. (CD)  2.29  2.24  2.24  2.31  
 ix.    Stretch,%, min. (MD)  5.69  5.70  5.70  5.64   
© EAC 2021 – All rights reserved  3 
  x.    Stretch,%, min. (CD)  7.60  7.39  7.39  7.30  
 xi.    Total balanced T.E.A, J/m2, min.  466(3 -ply)  
621(4 -ply)  514(3 -ply)  
683(4 -ply  514(3 -ply)  
683(4 -ply)  402(2 -ply)  
606(3 -ply)  
807(4 -ply)  
xii.    Tensile index Nm/g, min. (MD)  68  64  60  72  
xiii.    Tensile index, Nm/g, min. (CD)  47  46  43  52  
xiv.    Roughness, average of two sides, 
mL/min., max.  1 600  1 600  1 600  1 600  ISO 8791 -2  
xv.    Porosity, mL/min. (Bendtsen), min..  700  700  700  700  ISO 5636 -3  
xvi.    Tear resistance, mN, min. (MD)  1 020  1 157  1 157  1 294  ISO 1974  
xvii.    Tear resistance, mN, min. (CD)  1 157  1 227  1 108  1 247  ISO 1974   
xviii.    Water absorptiveness, g/m2, max.  30  30  30  30  ISO 535  
a Conditioning shall be done in accordance with ISO 187.  
 
5.2.2  The paper sack shall not burst when tested in accordance with ISO 7965 -1.  
6 Packaging  
6.1 Packaging and labelling  
Paper sacks shall be shall be packaged in suitable packages that prevent them from damage during 
transportation, storage and normal use.  
6.2 Labelling  
Each paper sack shall be clearly and indelibly marked with the following particulars:  
a) name and physical a ddress of the manufacturer/supplier and/or registered trademark;   
b) total balanced T.E.A (Tensile Energy of Absorption);  
c) country of origin or manufacture;  
d) batch/code number (optional); and  
e) type.  
7 Sampling  
Sampling shall be done in accordance with ISO 186.  
4 © EAC  2021 – All rights reserved  
 Annex  A 
(normative)  
 
Requirements the sewing thread  
A.1 Sewing thread/yarn  
A.1.1  General  
The thread/yarn shall be evenly spun with suitable number of turns per metre so that a balanced thread is 
produced.  
The thread/yarn shall be singled and shall have uniformity of thickness throughout its length. When visually 
examined, the threads shall be free from hairiness and snarls.  
A.1.2  Sewing threads made wholly or partly from synthetic fibres  
A.1.2.1  Type of sewing thread   
The type of sewing thread/yar n shall be as declared. In the case of blends, the blend composition shall be as 
declared subject to a tolerance of ± 5 %.  
A.1.2.2  Nominal linear density   
The nominal density (resultant) of the sewing thread/yarn in text shall be as declared, subject to a tolerance of 
± 4 %. This shall be determined in accordance with ISO 2060.  
A.1.2.3  Resultant linear density   
The resultant linear density of the sewing thread/yarn in text shall be as declared subject to a tolerance of ± 2 
% for continuous filament thre ads and ± 4 % for spun and plied threads.  
A.2 Coefficient of variation of linear density   
The coefficient of variation of the resultant linear density shall not exceed 2 % for continuous filament threads 
and 5 % for spun plied threads. The coefficient of  variation (C.V.) shall be calculated from the following 
formula:  
 
 
Where;  
x is the resultant linear density in tex of any thread sample;  
 is the mean resultant linear density of all the samples;   
© EAC 2021 – All rights reserved  5 
  n is the total number of samples; and   
is the standard deviation in tex  
A.3 Knots  
The number of knots permissible in a package of sewing thread shall be as specified in Table 1.  
TableA.1 — Number of permissible knots in a package  
S/No  Package length, m  Permissible knots  
 i.    Up to 1 000   not more than 1  
 ii.    More than 1 000 but not exceeding 2 500   not more than 2  
 iii.    More than 2 500 but not exceeding 4 000   not more than 3  
 iv.    More than 4 000 but not exceeding 5 500   not more than 4  
 v.    More than 5 500 but not exc eeding 7 000   not more than 5  
 vi.    More than 7 000 but not exceeding 8 500   not more than 6  
vii.    More than 8 500   not more than 7  
A.4 Total length  
The total length of sewing thread contained in a package shall be as declared subject to a toler ance of – 0.2 
%.  
A.5 Net mass  
The net mass of thread on a package shall be as declared subject to tolerance of - 0.2 %. Mass shall be the 
total mass of the absolute dry mass plus official regime.  
A.6 Breaking tenacity  
The minimum breaking tenacity of t he sewing thread shall be 20 cN per tex. This shall be determined in 
accordance with ISO 5079.  
A.7 Appearance   
When visually examined, the thread shall have a uniform shade or whiteness and shall be devoid of singeing 
defects and stains.  
A.8 Surface fin ish  
The threads shall be well lubricated to ensure efficient working on the appropriate types of sewing machines.   
6 © EAC  2021 – All rights reserved  
 Annex  B 
(informative)  
 
Typical examples of paper sacks  
A.1  The typical types of paper sacks are shown in Figure A.1 and Figure A.2.  
  
Figu re A.1 — Multi -paper sacks for packaging 50 -kg cement (sewn type)    
© EAC 2021 – All rights reserved  7 
 
  
Figure A.2 — Paper sacks for packaging 50 -kg cement (valve pasted end type)   
  
8 © EAC  2021 – All rights reserved  
 Bibliography  
KS 2497:2013 , Multi -wall paper sacks for packaging of cement - Specification  
 DEAS 866 :2021    
 
© EAC 2021  – All rights reserved