Mechanical finishing is defined as any operation performed to improve
the fabric appearance or functionality by physical manipulation. Steam or water
may accompany the physical manipulation; however chemical except lubricants
seldom used. Fabric lustre, smoothness, softness, residual shrinkage and hand
are the properties that can be altered by mechanical finishing.
Some of the mechanical finishes
are:
1.
Calendaring
2.
Shearing/Cropping
3. Raising (Napping or Sueding)
Raising is the term used to
create pile on the surface of fabric. In this fibres are deliberately pulled
out of yarn to give a hairy or fuzzy appearance and soft surface. Napping and
sueding are two techniques to create surface piles. These are the surface
finish not only enhance the appearance and hand of fabric but also give some
bulk & improve the warmth of fabric.
Sueding:
Sueding machine also called as
sueder or sander, it develops a very low pile on fabric surface. A soft and
smooth surface is obtained similar to peach skin so it is also called as
peaching effect. The hand will depend on the fibre composition, the filament
fabrics can be made to feel like spun fabric.
The sueding machine is made up
of some rotating rollers coated with abrasive paper/emery paper and the fabric
is run in touch with these rollers which emerise the cloth.
The sueders/sueding machines
are of two types:
1.
Single-cylinder Sueding machine
2. Multi-cylinder Sueding
machine
Single cylinder sueders have
one abrasive covered metallic roller and one rubber covered compression or
pressure roller, water circulates through the interior of cylinder to prevent
abrasive covered roller from expanding as it generates heat from friction. The
pressure roller presses the fabric against abrasive cylinder and it is
micrometer adjustable. The care must be taken to closely check the
deterioration of the abrasive material. It must be periodically changed to get
uniform sueding effect throughout the production.
Multi-cylinders
has usually large no. of emery coated rollers each independently driven and
they can be rotated clockwise or anticlockwise.
2 Comments
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ReplyDeleteFibre Disc are used to grinding curved surfaces of metal. We use this tool prior to painting, polishing, and finishing a product. We use Fibre Disc, after welding or connecting products, we only apply them to dry products. There is a lot of Fibre Disc Manufacturers in India but AbrasiveOnline is the top class Fibre Disc Manufacturers.
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