Technical Data

Parameter	Unit	Standards EN 622-1, EN 622-5, Tab.3						Testing standard
Thickness	mm	>4 do 6	>6 do 9	>9 do 12	>12 do 19	>19 do 30	>30 do 38
Density	kg/m3	780	770	760	750	730	710	EN 323
Bending strenght	N/mm2	23	23	22	20	18	17	EN 310
Integral bond	N/mm2	0,65	0,65	0,60	0,55	0,55	0,50	EN 319
Moduls of elasticity	N/mm2	2700	2700	2500	2200	2100	1900	EN 310
Swelling after 24h*	%	30	17	15	12	10	8	EN 317
Tearing off	N/mm2	>1						EN 311
Hygiene class	%	<0,1						Sample combustion and HCI etching method
Moisture content	%	od 4 do 11						EN 322
Thickness tolerance	mm	+/- 0,20		+/- 0,30				EN 324-1
Length and width tolerance	mm	+/- 2 mm/m (max +/- 5mm)						EN 324-1
Squareness tolerance	mm/m	2						EN 324-2
Edge straightness tolerance	mm/m	1,5						EN 324-2
The above physical and mechanical parameters relate also to Krono Stop Fire MDF fire-retardant boards.

Size (length x width) mm	Thickness mm
2800 x 2070	6	8	10	12	16	18	19	22	25	28	35	38

Parametr	Unit	General requirements EN 622-1 Physical and mechanical requirements. EN 622-5 Tab. 3			Testing standard
Thickness	mm	≥ 16,0 do 19,0		≥ 19,0 do 25,0
Density*	kg/m3		800		EN 323
Bending strength	N/mm2	20		18	EN 310
Integral bond	N/mm2		0,55		EN 319
Modulus of elasticity - major axis	N/mm2	2200		2100	EN 310
Swelling after 24h**	%		≤ 5		EN 317
Tearing off	N/mm2		>1		EN 311
Free formaldehyde content	mg / 100 g s.m.	≤ 8,0 (Hygiene class E1)			EN 12460-5
Mineral particle content	%	<0,1			Sample combustion and HCI etching method
Moisture content	%	od 4 do 11			EN 322
Thickness torerance	mm	+/- 0,30			EN 324-1
Lenght and width tolerance	mm	+/- 2 mm/m (max. +/- 5 mm)			EN 324-1
Squareness tolerance	mm/m	2			EN 324-2
Edge straightness tolerance	mm/m	1,5			EN 324-2
* Tolerance: +/- 5% ** Parameter complies with the requirements of the standard EN 622-5, Tab.4 (MDF.H) MDF MR FRONT can be coloured green.