woolwise - the australian wool education trust - the effects of … · 2017. 5. 7. · financial...
TRANSCRIPT
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The Effects of Poor Scouring Practice
Dr. Jock Christoe
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Compromises involved in Wool Scouring
§ cleanliness vs entanglement § cleanliness vs fibre damage § Cleanliness vs environment
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Effect of Scouring on Subsequent Processing
§ Residual contaminants § Fibre entanglement § Fibre damage § Moisture levels
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Comparative Processing Trials
§ Commercial Wool Scours § IWS/CSIRO – 5 scours/two wools § ACIAR/CSIRO – 12 scours/ two series/two wools § ANDAR/CSIRO – 1 scour/ three configurations
§ CSIRO Pilot Scour
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Effect on Scoured Wool Properties
§ Residual Contaminants § Colour
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Effect of Dirt on Colour
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Effect of pH on Yellowness
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Effect of Residual Contaminants
§ Accumulation § reduced processing performance § maintenance issues
§ Processing additives § loss in wastes § change in properties
§ Dust § Health issues § Yield
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Relationship between Ash Content of Scoured Wool and Top
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Effect of Contaminants on Topmaking
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Effect of Fibre Entanglement
Fibre Breakage in Carding
Increase in Noil (Romaine)
Shorter Top
Poor Spinning Performance
Economic Loss
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Causes of Entanglement
§ Opening § Mechanical § Scouring Conditions § Drying Conditions
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Effect of Opening on Entanglement
G.A. Robinson 1986
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Relationship between Hauteur and Romaine - IWS Trials
Fleece
Skirting
55
60
65
70
75
80
0 5 10
Romaine (%)
Hau
teur
(mm
)
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Top Characteristics (ACIAR – First Series)
suction drum scour
conventional long bowl scours
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Top Characteristics (ACIAR – Second Series)
65
70
75
80
5 6 7 8 9Romaine (% noil)
Hau
teur
(mm
)
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Fibre Damage
9.0
10.0
11.0
12.0
6 7 8 9 10pH
Bun
dle
Stre
ngth
(N/K
Tex)
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Effect on Spinning Performance
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Effect of Ash on Spinning
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ACIAR Trials – First Series
50
55
60
65
70
75
80
85
25 30 35 40 45 50Ends Down
Hau
teur
(mm
)
9
12
15
Tena
city
(N/k
Tex)
Hauteur
Tenacity
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ACIAR Trials – Second series
60
65
70
75
80
35 40 45 50Ends Down
Hau
teur
(mm
)
6.5
7
7.5
8
8.5
9
Tena
city
(N/k
Tex)Hauteur
Tenacity
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So What?
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Financial Implications
PLANT Reduction of 1%Romaine
Plant efficiency
%
Product Value USD
Potential Gain
USD/ann.
Greasy to top
1,000kg/hr
+10kg/hr 80 8.00 (10.00 –
2.00)
0.67M
Vertical – greasy to
fabric. 350kg/h
+3.5kg/hr 70 15/lin.metre (3m/kg)
1.32M
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SUMMARY
§ Scouring has a significant affect on topmaking performance
§ Fibre entanglement can lead to substantial monetary losses
§ Risk of fibre damage increases with pH