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Phenolic Coated Birch Plywoods -
Riga Form

Product
Birch plywood (Riga Ply) bonded with waterproof phenol resin adhesive and overlaid on both the sides with a phenol film (grade F/F).

Film colour
Normally chestnut brown or dark brown. Other standard colour are light brown transparent, dark brown, yellow non - transparent and transparent, green, colourless, black, grey, red. Other colours on request.
Under transparent films BB grade veneer is applied.

Applications

  • Chestnut brown (120g/m2) - for concrete shuttering, transport industry.
  • Dark brown (167g/m2 and 220g/m2), black (120g/m2) - for concrete shuttering, building boards, transport industry, flooring.
  • Light brown transparent (120g/m2), green (120g/m2), red (220g/m2) - for concrete shuttering, building boards, transport industry, flooring.
  • Colourless (120g/m2), yellow non-transparent (167g/m2), yellow transparent (120g/m2), grey (174g/m2) - for building boards, transport industry, flooring.

Advantage
Environmentally friendly, durable, workable, hygienic, not smelling and don't give taste to food-stuff, easy to clean, wear-proof, weather and water-proof, resists commonly used chemicals. Riga Form for shuttering can be re-used many times.

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
A smooth phenol film, which is hot-pressed onto the surface, is used as an overlay. The film is composed of a base paper and phenol resin that is impregnated into the base paper. Film weights 120g/m2, ~170g/m2, 220g/m2. Overlaying with higher resistance to abrasion and multi-layer overlaying are also possible (respectively 240g/m2, 440g/m2 etc.). Multi-layer overlaying gives superior wear resistance.

Overlaying characteristics
Overlaying surface is smooth, glossy and hard. It withstands abrasion, it is weather and moisture proof and resists commonly used chemicals, dilute acids and alkalis. The surface is easy to clean with water or steam wash. Abrasion resistance according to the Taber test (EN 438-2): depends on applied film, conditions of product storage and application, thickness of film (see below) a.o.

It is possible to obtain overlaid plywood resistance to wear even above 10 000 revolutions.
Company’s specialists will assist you to choose the most appropriate product.

Edges sealing
Edges of the panels are matched with the face against absorption of moisture by using acrylic paint. Other colours are available and the 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 and machining available in accordance with the customers' requirements.

Thickness:
 
         4, 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 4 6,5 9 12 15 18 21 24 27 30 35 40
Number of plies 3 5 7 9 11 13 15 17 19 21 25 29
Average actual
thickness, mm
3,8 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 3,5 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 4,1 6,9 9,5 12,5 15,3 18,1 20,9 23,7 26,8 29,9 35,4 41,2
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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