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Phenolic Coated Birch Plywoods -
Riga Preprime

Product
Birch plywood which is overlaid on one side or both the sides with a preprimed painting film, thus preparing the surface of the panel for painting. This film is a good base for painting and does not require any priming or other preparation.

Application
Walls, ceilings, surfaces of furniture, front doors to be painted, lorries, factory rooms, containers, household, trailer side boards, traffic signs, information and advertising boards.

Advantage
Environmentally friendly, easy and fast to paint, less consumption of paint, does not require priming, does not crack during interior and exterior application.

Recommendations
Following paints are suitable: epoxy, polyurethane, alkyd paint, water-soluble acrylic paint for exterior use. Painting must be performed according to the paint manufacturers' instructions.

Gluing classes
Plywood is glued with waterproof phenol formaldehyde resin adhesive. Bonding is resistant to weather and boiling water. It meets requirements of the following standards:

EN 314 / 3rd class;
BS 1203 / H4 (previously WBP); 
DIN 68705 Part 3 /
type BFU 100.

Formaldehyde emission
In accordance with the standard EN 13986 formaldehyde emission meets the Class E1 requirements. Test method EN 717 Part 2.

Overlaying
The panel is overlaid with a preprimed painting paper and glue film during hot-pressing process. Total weight of surfacing (depends on the applied films) is 350-400 g/m2. It is possible to have such an overlay (PRE/PRE) on both sides (identical or different), or preprimed painting paper on one side and phenol film on the reverse side, or a preprimed painting paper on one side and the plywood quality on the reverse side is grade BB; WGE.

Film colour
Light grey.

Overlaying characteristics
The preprimed painting paper forms a base that does not need any sanding or priming. Thus, painting becomes easier and faster to accomplish. Paint consumption is reduced and such an overlay prevents the cracking of the paint coating when the product is used under outdoor conditions.

Edges sealing
Edges of the panels are sealed against moisture penetration by using grey acrylic paint. Other colours are available, and edges may be unsealed at customers' request.

Sizes:
          1200 mm x 1200 / 1500 / 1800 / 2100 / 2400 / 2700 / 3000 mm
          1220 mm x 1220 / 1525 / 1830 / 2135 / 2440 / 2745 / 3050 mm
          1250 mm x 1250 / 1500 / 1800 / 2150 / 2500 / 2750 / 3000 mm
          1500 mm x 1500 / 1800 / 2100 / 2500 / 2700 / 3000 mm
          1525 mm x 1525/1830/2135/2440/2745/3050 mm
Cut to size panels andmachining available in accordance with the customers' requirements.

Thickness
          
6.5, 9, 12, 15, 18, 21, 24, 27, 30, 35, 40 mm.

Tolerance
Size and right angle tolerance meets the standard EN 315 requirements.

Nominal thickness,
 mm
6,5 9 12 15 18 21 24 27 30 35 40
Number of plies 5 7 9 11 13 15 17 19 21 25 29
Average actual
thickness, mm
6,4 9,2 12,0 14,9 17,7 20,5 23,4 26,5 29,4 35,0 38,7
Lower limit, mm 6,1 8,8 11,5 14,3 17,1 20,0 22,9 25,8 28,7 33,6 38,4
Upper limit, mm 6,9 9,5 12,5 15,3 18,1 20,9 23,7 26,8 29,9 35,4 41,4
Parameter Tolerance
Length, width, (mm)
<1000
1000…2000
>2000

± 1 mm
± 2 mm
± 3 mm
 Right angle ± 0,1 %
Edge straightness ± 0,1 %

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