Agriculture Reference
In-Depth Information
15
Ramie
Jute
Sisal
10
5
0
0
50
100
150
Length (mm)
200
250
300
Fig. 10.13.
Fibre length distribution, length measurement using tweezers with at least 1000 fibres per sample.
20
Cotton
Flax A
Hemp
15
10
5
0
0
50
100
150
200
250
300
350
400
Length (mm)
Fig. 10.14.
Fibre length distribution, length measurement using tweezers with at least 1000 fibres per sample
Table 10.6.
Measurement of the fibre width/optical system, Fibreshape.
Sisal
Jute
Hemp
Flax B
Flax A
Ramie
Cotton
Number of
elements tested
1,011
3,492
5,074
6,974
18,894
5,172
18,029
Centile X
0.90
:
μ
m
162.6
62.8
76.3
69.5
32.8
31.4
20.4
Quartile X
0.75
:
μ
m
121.1
50.3
48.7
31.3
22.4
24.7
18.0
Median X
0.50
:
μ
m
85.3
34.8
26.8
19.0
16.9
18.5
15.4
Quartile X
0.25
:
μ
m
27.7
12.5
13.4
12.3
12.2
13.5
12.8
Centile X
0.10:
μ
m
11.6
6.0
7.6
7.3
8.2
9.8
10.2
Mean value:
m
m
84.4
34.8
37.6
30.7
20.2
19.8
15.5
Standard deviation
μ
m
59.9
23.5
39.3
36.2
15.5
8.5
4.4
Coeff. of variation
%
70.9
67.4
104.5
117.7
76.9
42.9
28.2
Level of confidence
95%/5%
μ
m
3.7
0.8
1.5
1.1
0.3
0.2
0.1
properties after different steps of separation
for trial K1 (GA - GADO). Because of their struc-
ture, hemp fibre bundles can be modified within
certain limits, in particular with regard to fineness
and length. This offers a very broad range of
applications. Coarse hemp fibre bundles
extracted by low-cost processes can be used in
engineering applications such as soil and
hydraulic engineering or automobile manufactur-
ing. By more intensive (mechanical, chemical,
