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12 LINK 55 . 2 /2010
TRENDS & MARKETS
Recycling of Comber Noil in Rotor
Spinning
Use of comber noil and carding waste for making yarns of specific application
is well known. However, Rieter R 40 and R 923 provide the optimum
technology to achieve economical raw material use.
Fig. 1 The green
solution for spinning
recycled materials-
R 92 (above) and
R 40 (below) rotor
spinning machines.
Tab. 1 Raw material blend and costs for Ne 12
Operating a green business is as well good for the environment
as good for the business bottom line because
conserving resources saves money.
Recycling involves processing used materials into
new products to prevent waste of potentially useful
materials, reduce consumption of fresh raw materials,
reduce energy usage and reduce pollution.
Spinning mills can take a large step towards being
more environment friendly by reducing the amount
of waste in their textile business operations and
achieve economy by reducing raw material costs.
The open end spinning is one such process that helps
in converting the waste materials that are generated
during spinning processes, into new materials or
products of high quality. The rotor spinners in India
use carding and comber wastes to produce coarser
counts like Ne 6s, 10s 14s, and 16s which are predominantly
used in making home textiles and also
apparels.
Count Mixing Cost of raw each material Cost of blended raw
material
Ne 12
50% comber noil 55 kg/h, 48 INR/kg, (0.70 EUR) 110 kg/h
56.5 INR/kg (0.82 €/kg)
50% Cotton (J 4) 55 kg/h, 65 INR/kg, (0.94 EUR)
Tab. 2 Raw material blend and costs for Ne 18
Count Mixing Cost of raw each material Cost of blended
raw material
Ne 18
25% comber noil 55 kg/h, 48 INR/kg (0.70 EUR)
15% card droppings kg/h, 28 INR/kg (0.40 EUR)
60% cotton (J 4) 65 kg/h, 65 INR/kg (0.94 EUR)
220 kg/h
55.2 INR/kg
(0.80 EUR/kg)
Rieter offers to its customers the robust R 92 semiautomated
rotor spinning machine and R 40, the fully
automated rotor spinning machine, both known
for their fast and very easy operations. The latest
technology provided in the machine helps in producing
superior quality yarns in a cost-effective way.
The economy of modern Rieter machines is based on
energy consumption, minimum labor cost combined
with effective support of operators, fast doffing and
easy package removal.
Economy in raw material preparation
In a ring spinning mill producing combed counts,
five high performance combers like Rieter E 66/E 76,
generates 55 kg of comber noil per hour. This gives
the possibility to generate an income of 22.7 Mio
INR ( 0 000 EUR) per annum by selling the noil
in the market at the current rate of 48 INR per kg.
However, a quantum value increase is possible when
mills spin yarns for specific applications by mixing
the comber noil with virgin cotton. Table 1 shows
mixing details for two different counts and the economy
of raw material cost that can be achieved with
effective mixings considering 8 600 working hours
per year (exchange rate 69 INR = 1 EUR).
For count Ne 12, it is possible and feasible to mix
only comber noil with virgin cotton to achieve the
desired yarn values. For yarn count such as Ne 18, it
is required to have some long fibers to achieve optimum
strength in the yarn. This is possible by mixing
smaller amounts of card droppings in the raw material
mixings. Table 2 shows the even more economical
costing of such a raw material mixing for Ne 18.
Advantages of short rotor spinning process
A Rieter rotor spinning line consists of a short opening
line with high production cards, one drawframe
passage and rotor spinning machine with yarn clearer
producing ready to use yarn packages.