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Glossary
Technical Glossary
Ballastless track
Rail track frequently constructed on a
load-bearing asphalt sub-layer. This type
of track is mainly used for high-speed
rail links. Where asphalt is used as a
sub-layer, concrete sleepers are laid
directly on the asphalt. Alternatively, a
concrete sub-layer can be used. In this
case, bi-bloc concrete sleepers are
integrated into the concrete sub-layer.
The main advantages of ballastless
track: high stability and low maintenance.
Carrier material
Wood-based materials which serve as
the base for decorative surface facings
(HPL, melamine-faced chipboard). The
preferred materials are raw particleboard
and MDF.
Combined heat-power plant
Also known as co-generation plant.
A decentralized plant for generating
energy, supplying Pfleiderer with electricity
and production heat, particularly
used in the production of wood-based
board (Pfleiderer’s “Central Energy
Unit”).
Contipress
A twin-band press used in the continuous
production of particleboard, MDF or
laminates. As the process is continuous,
after pressing the board must be cut
to a pre-defined length using a diagonal
saw. The twin-band press enables both
thickness and width of the material to
be pre-set, so that the production line
can then run using a wide variety of
base materials.
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EPF
European Panel Federation – the industrial
association of the engineered
wood industry in Europe, with offices
in Brussels. Among others, the EPF
publishes an annual report describing
international developments in the engineered
wood industry.
HDF – High-Density Fiberboard
Engineered wood-based board consisting
of wood fibers soaked in glue which
are then pressed together under heat
at very high compression. Preferred
carrier material where high load-bearing
properties and thin material thickness
are required (e.g. laminated flooring).
HPL – High-Pressure Laminate
High-pressure laminate consists of
several layers of core paper and a decorative
face layer. The paper layers are
impregnated with phenol and melamine
resins and then compressed under
heat. This surface material is extremely
durable and is ideal for furniture and
interior surfaces subject to heavy wear
(e.g. kitchen worktops).
MDF – Medium-Density Fiberboard
Wood-based board comprising wood
fibers impregnated with glue and compressed
under heat. This material has
a homogeneous structure and very
smooth surface. It is especially used
for three-dimensional furniture fronts,
as well as for varnished or high-gloss
surfaces.
MFP – MultiFunctionPanel
MultiFunctionPanel is an engineered
wood board with facing and middle layers
made of slender random-direction
stands. MFP has high cross and longitudinal
tensile strength, making it particularly
suitable as a construction material
for trade fair stands or interior fixings.
MFC – Melamine-Faced Chipboard
Particleboard with a finished surface,
faced with melamine (decorative paper
soaked in melamine resin). Using heat
and pressure, the melamine film is
compressed onto the board to give a
durable plastic top surface.
OSB – Oriented Strand Board
Engineered wood board made of
glue-soaked slender wooden strands
arranged lengthwise and crosswise
in layers to form a mat which is then
compressed under heat. This board
has a high bending strength, making it
suitable for construction purposes.
Particleboard/Chipboard
Particleboard is produced by combining
wood chips and/or smaller particles of
other similar material (flax, hemp) with
resin-based glue. The chips and particles
are then hot pressed into board.
Postforming elements
This comprises particleboard or MDF
board, faced with a layer of HPL. The
facing is moulded around the edges
of the carrier board at a pre-defined
radius. This is done by heating the HPL
facing and then moulding it mechanically.
Rail track sleeper
Two main types of sleeper are used in
track construction. Monolithic sleepers
are made of pre-stressed concrete
and are capable of withstanding high
loads – this type of sleeper is frequently
constructed on a classic ballast sublayer.
The bi-bloc sleeper, on the other
hand, comprises two separate nonreinforced
concrete units connected
together by a steel grid. This type of
design is mainly used when constructing
RHEDA 2000® ballastless track.