Preparation of Fibrous Materials
and Pulverizing of Fibrous Materials
Economical Preparation of Plants
Industrial processing of
renewable new materials is being driven forward
worldwide; whether it is for the usage of the fiber
components, the pith for the production of fodder, for
gaining ingredients such as proteins and vitamins, for
the extraction of oil and alcohol or for the production
of thermal energy.
PALLMANN has developed
suitable processes and machines that allow the
economical preparation of renewable raw materials.
Customer requirements are very diverse. Vegetable
matter is to be prepared for extraction into homogeneous
end products without a high percentage of fines.
Cell structures are to be
broken down in order to be able to better press the
contents. Fibers with a defined length or width
are to be gained in order to increase the physical
of composite materials. Voluminous feed materials
are to be processed automatically, if possible, in order
to be able to feed downstream processes.
The waxen layer on steams must be roughened in order for
glues and adhesives to stick. Vegetable matter
contains natural foreign objects such as sand and stones
as well as other disturbing matter, i.e. metals and
plastics that must be removed automatically during
processing, if possible.
requires special machinery, for example, with ballistic
discharge system components such a heavy gravity
sifters, stone traps, over belt magnets and non-ferrous
Machines with a high wear resistance that are not
sensitive to feeding fluctuations are required.
Installed in process lines, the machines operate around
the clock. Scheduled downtime for maintenance is
normally planned on an annual basis. The machines
used for these purposes distinguish themselves by their
flexibility in the adjustment of technical process
parameters and absolute reliability.
Defiberization of Cellulose
Important criteria during
the production of hygiene products such as baby diapers,
adult incontinence products, female sanitary napkins and
tampons are the protection of the skin and the moisture
absorption; for the production of paper and nonwoven
products such as table cloths, napkins and cloths, it is
good absorption and tear-resistance.
In order to meet this criteria, the cellulose sheet and
rolls must be defiberized into long fibrous, nib-free
disintegrated cellulose with a low percentage of fines.
For this purpose,
Hammer Mills, Type PHM with a horizontal infeed system are used for
preliminary size reduction and
Double Stream mill, Type PSKM, are used for the nib-free final
Recyclable material is
disintegrated with PALLMANN
Knife Mills in order to regain the drying agent SAP
and to reuse the cellulose material.
Special separators divide
the composition of cellulose and plastic film.
Systems process the remaining fraction of plastic
film into a reusable, free flowing agglomerate with a
high bulk density.
Preparation of Leather Fibers - LEFA
fibers are produced from leather waste, natural or
chrome tanned strips as well as hides, tanned folds and
leather edge trimmings from the show factories.
The leather fiber has specific characteristics which
makes it well suited for the show industry, for example,
for the production of insoles, intermediate soles, toe
and heel cap material, shafts as well as sandal soles,
first class liners, roll seams, heels and soles for
light summer shoes. Leather fiber has practically
the same characteristics as natural leather.
The quality and the physical
characteristics of the finished product and therefore
also the competitiveness start with the preparation of
the leather waste. Depending on the process, if a
longer or shorter material is required, they must in any
case be disintegrated free of knots.
The leather fiber industry,
together with PALLMANN is developing new technologies
and better procedures. Due continuous improvement
in practical applications and intensive new
developments, new directions for the defiberization of
leather waste are opened, which allow preparation of any
type of waste with the same machine regardless if dry,
moist, or wet. Knife mills as well as tooth disc
mills and refiners were specially developed for the
leather fiber sector.
In the first preparation
step, leather waste is pre-fiberized into slurry by
means of a special knife mill. A downstream tooth
disc mill quickly and thoroughly disintegrates the
slurry. In a third processing step, a corundum
disc refiner performs defiberization. This process
distinguishes itself by means of a controllable material
feeding allowing an automatic operation as well as
linger tooth disc life.