Sklejka Pisz S.A. - czołowy producent sklejki w Polsce

Compreg is a very special wood composite material with exquisite mechanical properties. The generic name compreg indicates that it is both impregnated and compressed. It is used in applications where long durability, hardness, and dimensional stability is required e.g. gears, rolls and wear strips of industrial conveyors, woodworking machine tables or lining of formula I car floors.Thanks to special build, compreg is resistant to X-rays, which is being used inmedical and military applications. However, by no means is it only a material forindustrial applications. Regardless of its hardness, it is comparatively easy to machine, which makes it an excellent choice for manufacturers of exclusive woodworking products.

We produce compreg in three versions:
Machine Compreg, Self-lubricating Compreg, and Aircraft Compreg „Delta“.

MACHINE COMPREG
This type of compreg is manufactured with the use of 0,8 mm beech veneers and special phenol-formaldehyderesin in water solution. Depending on the direction of the grain in adjacent plies we distinguish machine compreg cross (neighbouring layersare laid with the grain at right angle to each other) and machine compreg parallel reinforced (veneers in each layerhave the grain running same direction – apart of few which are laid at right angle for reinforcement of the wholepanel). It is interesting, that opposite to standard plywood and against intuition, compreg parallel has better mechanical characteristics than compreg cross. This is due to the fact, that during forming compreg plates are processed in very high pressure up to 20 MPa and in parallel construction, it is easier to pack closer grains running in the same direction than crossed ones.

SELF-LUBRICATING COMPREG
This type of compreg is manufactured from beech veneers 0,6 mm coated with special emulsion containing phenol resin with added machine oil. This allows self-lubricating compreg to be used in applications where limiting of friction forces is required. In this case, too, we have two kinds of self-lubricating compreg i.e. cross and parallel reinforced build.

AIRCRAFT COMPREG „DELTA”
Type of compreg manufactured with the use of 0,5 mm birch veneers, and special phenol-formaldehyde resin in alcohol solution. It is a very specific kind of compreg with characteristics better then machine compreg, directed for special applications in aircraft industry.


Characteristics of machine compreg and self-lubricating compreg:

		Machinery Compreg		Self-lubricating Compreg
		BN-75/7126-02, BN-74/7126-01
Technical data	Units	Parallel Reinforced	Cross	Parallel Reinforced	Cross
Density (min)	kg/m3	1200		1200
Moisture content	%	4-8		4-8
Bending strength (min)	MPa	177	118	177	103
Tensile strength (min)	MPa	167	108	-	-
Copmpression strength (min)	MPa	118	100	118	88
Shear strength parallel to plies - dry (min)	MPa	14	13	10	9
Shear strength in the plane perpendicular to plies - dry (min)	MPa	-	-	9	8
Hardness - Brinell number (min)	MPa	157	167	108	118
Impact strenght (min)	kJ/m2	59	34	59	54
Water absorbation after 24 immersion (max)	%	8		16
Swelling after 24 immersion measured across plies (max)	%	6		10

Standard size: 1000 x 1500 mm

Thickness: 5-120 mm

Other sizes and thickness available on request.

Possibilities of post processing:

• cutting to size.