0  
 
TBS/CDC 13 (6544)  P3 
©TBS 2020 — All rights reserved    1st Edition  
  
 
 
 
DRAFT  TANZANIA STANDARD 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Polyvinyl Acetate -Based a dhesives for wood –Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU  OF STANDARDS 
 
 
 
 
 
  
 
 
 
 
 
 
 
 1  
 
TBS/CDC 13 (6544)  P3 
©TBS 2020 — All rights reserved    1st Edition  Foreword 
This Draft Tanzania Standard was prepared by the Technical Co mmittee on Paints Varnishes  and 
related Products under supervision of Chemicals Divisional Standards Committee  and it is in 
accordance with the procedures of the Tanzania  Bureau of Standards.  
 
During the preparation of this standard  reference was made to the following standards : 
KS 509: 1997 (Confirmed 2011)  Specification for adhesives for woodworking  published by Kenya 
Bureau of Standards : 
ASTM D4317 – 16 Standard Specification for Polyvinyl Acetate -Based Emulsion Adhesives  
published by ASTM International  
For the purpose of deciding whether a particular requirement of this standard is complied with, the final 
value observed or calculated expressing the result(s) of a test or analysis shall, be rounded off in 
accordance with TZS 4  Rounding off numerical values . The number of significant places retained in 
the rounded off value should be the same as that of the specified value in this standa rd.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 2  
 
TBS/CDC 13 (6544)  P3 
©TBS 2020 — All rights reserved    1st Edition   
 
 TBS/CDC 13 (6544)  P3 
 
 
 
Polyvinyl Acetate -Based  adhesives for wood –Specification  
 
 
1. Scope  
This Draft Tanzania Standard specifies requirements, methods of sampling and test ing for Polyvinyl 
Acetate -Based  adhesives intended for the bonding of wood to wood.  
 
2. Normative references  
The f ollowing normative references are indispensable for the application of this standard. For dated 
references, only the edition cited applies. For undated references, the latest edition of the normative 
references (including amendments) applies .  
TZS 4  Rounding off numerical values  
ISO 15605 Adhesives – Sampling  
TBS/CDC 13 ( 6765 ) P3 Methods of test for adhesives  
ASTM D1084 -16 Standard Test Methods for Viscosity of Adhesives  
TZS 1894/IS0 6503 Paints and Varnishes – Determination of total lead – Flame atomic 
absorption spectrometric method  
 
3. Terms and definitions  
 
<<<<<<<<Not applicable>>>>>>>>  
 
 
4. Requirements  
 
4.1. General requirements  
The for Polyvinyl Acetate -Based  adhesive when applied, shall form a uniform  and smooth film f ree 
from coarse particles.  
4.2. Specific requirements  
The for Polyvinyl Acetate -Based  adhesive shall comply with the requirements given in Table 1 
when tested according to the methods prescribed in TBS/CDC 13 ( 6765 ) P3. 
 
 
 
 
 
 
DRAFT TANZANIA STANDARD  3  
 
TBS/CDC 13 (6544)  P3 
©TBS 2020 — All rights reserved    1st Edition  Table 1 – Specific requirements of for Polyvinyl Acetate -Based  adhesive for woodworking  
SL. No Characteristics  Requirements  Methods of Test  
Ref. to Clause  
(i)  Solid content, per cent by mass, min  50 TBS/CDC 13 (6765) 
P3, 2.1 
(ii)  pH value  at 23 ± 2 °C  4 - 6 TBS/CDC 13 (6765) 
P3, 2.2 
(iii)  Resistance to freezing and thawing  To pass test  TBS/CDC 13 (6765) 
P3, 2.3 
(iv)  Freedom from staining  To pass test  TBS/CDC 13 (6765) 
P3, 2.4 
(v)  Shear strength, minimum load at failure , (kgf) 150  TBS/CDC 13 (6765) 
P3, 2.5 
(vi)  Resistance to sustained loading, minimum load resisted 
for 7 days , (kgf) 50  TBS/CDC 13 (6765) 
P3, 2.6 
(vii)  Gap filling properties, minimum shear strength , kg 16  TBS/CDC 13 (6765) 
P3, 2.7 
(viii)  White point, maximum  4°C TBS/CDC 13 (6765) 
P3, 2.8 
(ix)  Wearing effects on cutting edges, maximum  damage , 
mm  0.005  TBS/CDC 13 (6765) 
P3, 2.9 
(x)  Viscosity at 23 ± 0.1°C Pa.s  18 - 20 ASTM D1084 -16 
(xi)  Total lead content, max. ppm  90  TZS 1894  
 
5. Packaging  
The for Polyvinyl Acetate -Based  adhesive shall be packed in  a suitable airtight container that prevents 
it from deterioration of its quality during storage, transportation and handling.  
6. Labelling  
6.1 The labelling shall be either in English  or Kiswahili or in combination as agreed between the 
manufacturer and/or the supplier. Any other  addition al language is optional.  
6.2 The adhesive shall be packaged in containers that are legibly and indelibly marked with the 
following information:  
a) the nam e of the product as Polyvinyl Acetate -Based  adhesives for wood   
b) name and address of the manufacturer;  
c) trade mark if any  
d) net content;   
e) batch number;  
f) date of manufacture;  
g) best before date; and  
h) instructions for storage, use, disposal and safety precautions.  
7. Sampling  
Sampling shall be done in accordance with ISO 15605 . 
8. Tests 
Methods of test shall be as prescribed in TBS/CDC 13 ( 6765 ) P3.