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Mr. Joseph John, Ms. Preethy Paul, Mr. E. Ponce, Mr. G. Lottmann, Dr. R. K. Matthan

VISCOSITY BEHAVIOUR OF LATEX

Variation of Viscosity

No definite patternvariation based on Season Location to locationClone to cloneTapping systems 

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VISCOSITY BEHAVIOUR OF LATEX Seasonal Variation

Changes in

Brookfield Viscosity

Fordcup Viscosity

Zinc Oxide Thickening

SEASONAL VARIATION OF VISCOSITY AND ZINC 

OXIDE THICKENING IN SOUTH INDIAN LOCATION

VISCOSITY BEHAVIOUR OF LATEX

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VISCOSITY BEHAVIOUR OF LATEX

Oct11‐L1

Nov11‐L2

 Dec11‐L3

 Jan12‐L4

Feb12‐L5

 Mar12‐L6

 Apr12‐L7

 May12‐L8

 Jun12‐L9

 July12‐L10

 Aug12‐L11

BROOKFIELD VISCOSITY 79.00 86.50 89.50 95.00 103.50 90.00 82.00 79.50 74.00 70.50 80.00

0.00

20.00

40.00

60.00

80.00

100.00

120.00

cps

SEASONAL VARIATION IN BROOKFIELD VISCOSITY (cps)

VISCOSITY BEHAVIOUR OF LATEX

 Lot 1  Lot 2  Lot 3  Lot 4  Lot 5  Lot 6  Lot 7  Lot 8  Lot 9  Lot 10  Lot 11

Oct 11 Nov 11 Dec 11 Jan 12 Feb 12 Mar 12 Apr 12 May 12 June 12 July 12 Aug 12

FORDCUPVISCOSITY

31.21 31.44 31.62 29.38 31.53 30.00 30.24 32.25 29.31 30.49 29.01

27

28

29

30

31

32

33

SECONDS

SEASONAL VARIATION IN FORDCUP VISCOSITY (S)

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VISCOSITY BEHAVIOUR OF LATEX

OCT 11  NOV 11  DEC 11  JAN 12  FEB 12  MAR 12  APR 12  MAY 12  JUN 12  JUL 12 AUG 12

ZOV'5 29.75 21.97 36.31 4.21 8.21 5.56 16.03 25.79 19.59 11.35 0.63

ZOV'60 29.75 18.5 28.49 5.26 4.35 6.11 12.21 29.56 11.49 8.51 0.63

0

5

10

15

20

25

30

35

40

%THIC

KENIN

G

SEASONAL VARIATION IN THICKENNG (%)

VISCOSITY BEHAVIOUR OF LATEX

 Lot 1  Lot 2  Lot 3  Lot 4  Lot 5  Lot 6  Lot 7  Lot 8  Lot 9 Lot10

 Lot11

Oct 11Nov11

Dec11

Jan 12Feb12

Mar12

Apr12

May12

June12

July12

Aug12

ZOV'5 102.5 105.5 121.99 98.99 111.99 95.00 95.14 100.00 88.49 78.50 80.50

ZOV'60 102.5 102.5 114.99 99.99 108.00 95.49 92.01 103.00 85.02 76.49 80.50

BROOKFIELD VISCOSITY 79.00 86.50 89.50 95.00 103.50 90.00 82.00 79.50 74.00 70.50 80.00

0

20

40

60

80

100

120

140

(cps)

SEASONAL VARIATION IN THICKENING (cps)

VISCOSITY BEHAVIOUR OF LATEX

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VISCOSITY BEHAVIOUR OF LATEXEFFECTS OF VISCOSITY AND THICKENNING ON 

HIGH MODULUS COLD PV LATEX

MONTH Oct 11 Nov 11 Dec 11 Jan 12 Feb 12 Mar 12 Apr 12 May 12 June 12 July 12 Aug 12

LOT NO. Lot 1 Lot 2 Lot 3 Lot 4 Lot 5 Lot 6 Lot 7 Lot 8 Lot 9 Lot 10 Lot 11BROOKFIELD(cps) 79.00 86.50 89.50 95.00 103.50 90.00 82.00 79.50 74.00 70.50 80.00

ZOV'5 (cps) 102.50 105.50 121.99 98.99 111.99 95.00 95.14 100.00 88.49 78.50 80.50

ZOV'60 (cps) 102.50 102.50 114.99 99.99 108.00 95.49 92.01 103.00 85.02 76.49 80.50

24 HRS (cps) 110.50 140.50 134.00 121.50 117.00 103.50 86.50 268.50 94.50 87.00 91.50

14th DAY (cps) 86.50 117.00 101.00 114.00 118.00 115.00 76.00 179.00 64.00 77.00 80.00

30th DAY (cps) 84.50 97.50 83.00 117.00 102.50 92.50 71.00 164.50 82.50 69.00 73.50

VISCOSITY BEHAVIOUR OF LATEX

Property 1 (original) 2 3 4

Brookfield Viscosity (cps) 83.00 103.00 106.00 122.00

ZOV5 % 2.41 69.90 57.55 55.00

ZOV60 % 112.05 70.87 60.38 52.05

Final Brookfield Viscosity 176.00 176.00 170.00 185.50

Ford Cup#3 sec 27.04 33.56 33.48 33.76

Thickening Effect of Latex of Increasing Viscosity

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SEASONAL VARIATION OF VISCOSITY  IN 

GUATEMALA

VISCOSITY BEHAVIOUR OF LATEX

VISCOSITY BEHAVIOUR OF LATEX

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VISCOSITY BEHAVIOUR OF LATEXMonth Variation of Apparent Viscosity (Brookfield)

40

50

60

70

80

90

100

110

01/06/11 01/08/11 01/10/11 01/12/11 31/01/12 01/04/12 01/06/12 01/08/12

Aparent viscosity, cP

(25 °C, TSC 60%, sp2, 60 rpm)

Apparent viscosityCentrifuged latex

(Average by latex type, weekly results), cP

HA LA TMTD  Free

VISCOSITY BEHAVIOUR OF LATEXEffect of Dilution on Apparent Viscosity (PICA Latex)

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Viscosity and Thickening plays major role in product

Formation

Shaping and

Consolidation

VISCOSITY BEHAVIOUR OF LATEX

Dip Pick up at Different Viscosities

VISCOSITY BEHAVIOUR OF LATEX

83.50 93.00 103.00 113.50 123.00 133.00 143.00 173.00

Viscosity 0.48 0.48 0.49 0.49 0.49 0.49 0.50 0.50

0.47

0.48

0.48

0.49

0.49

0.50

0.50

0.51

Thickness

Thickness vs Viscosity  (Straight Dip)

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VISCOSITY BEHAVIOUR OF LATEX

83.50 93.00 103.00 113.50 123.00 133.00 143.00 173.00

Viscosity 0.48 0.48 0.49 0.49 0.49 0.49 0.50 0.50

0.47

0.48

0.48

0.49

0.49

0.50

0.50

0.51

Thickness

Thickness vs Viscosity  (Coagulant Dip)

PRODUCT THICKNESS AND VISCOSITY

VISCOSITY BEHAVIOUR OF LATEX

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CONDOM‐ 0.05‐0.07 mm

VISCOSITY BEHAVIOUR OF LATEX

MALE EXTERNAL CATHETER‐0.15‐0.16 mm

VISCOSITY BEHAVIOUR OF LATEX

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GLOVE SURGICAL‐ 0.16‐0.18 mm

VISCOSITY BEHAVIOUR OF LATEX

BALLOONS‐0.25‐0.30

VISCOSITY BEHAVIOUR OF LATEX

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BLADDERS‐0.85‐0.90 mm

VISCOSITY BEHAVIOUR OF LATEX

GLOVE HOUSEHOLD‐0.93‐1.00 mm

VISCOSITY BEHAVIOUR OF LATEX

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GLOVE ELECTRICIAN‐ 1.30‐1.60 mm

VISCOSITY BEHAVIOUR OF LATEX

FOLEY CATHETER‐ 2.30‐2.50mm

VISCOSITY BEHAVIOUR OF LATEX

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VISCOSITY BEHAVIOUR OF LATEXCONCLUSION

Seasonal Variation of Viscosity Clonal Variation of Viscosity Locationwise Variation of Viscosity Normal Thickening Thickening due to inefficient handling of field latex Thickening Brookfield vs Fordcup Thickening percentage vs units Use of stabilisers to reduce thickening Pick up vs Viscosity Use of artificial thickeners Follow good manufacturing practices

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