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Products Film Faced Plywood Austria MPLY (Welde) Plywood
Austrian Welde Plywood (Poplar & Bich)
Boy : 1250
En : 2500
Tree : % 100 Poplar

Dimensions, mm 2500 x 1250
Thickness, mm 15, 18, 21
Tolerance on length/ width +/- 2 mm
Number of plies 8, 9, 11 for each respective thickness
Kind of a surface smooth
Film surface 120 g/m2, dark brown
Processing of edges by waterproof paint
Wood basis poplar
Formaldehyde emission class E1
Water resistance WBP mark
Moisture content 8-12 %
Ultimate shearing strength 2,0 MN/m2 (after one hour in boiling water)
Module of elasticity 5200-4200 N/mm2
Bending resistance 56-48 N/mm2
Surface resistance to wear (Taber rotations) 350-400

WELDE PLYWOOD

The plywood for the building industry "Welde Film Robusta" is produced according to the European Standards (EN).

 


The plywood faces are covered with special water-repelling resin paper under the influence of high temperature and pressure. This procedure of paper application protects the plywood panels against moisture. The edges of the plywood panels are also protected against moisture with suitable paint.


Plywood panels covered with smooth water-repelling resin paper are especially suitable for outdoor applications – mostly for building reinforced concrete forms.

 

Sizes

  • Length, mm: 2500; 2440 ± 2.0;
  • Width, mm: 1250; 1220 ± 2.0;

  • Thickness, mm: 12; 15; 18 and 21 rated thickness.

 

 Other thickness values are also possible, as per customer’s request. The permitted variation in the nominal thickness is the same as for the raw plywood.

 

Grading according to the appearance of the surface

 

The qualities according to the appearance of the surface are defined as per the Technical Specifications of the mill. According to the defects on the surface the plywood is separated in Extra, Standard, or Economy qualities.

 

Name of Defects

Norms of permittance

Extra quality

Standard

Economy

Panel squaredness
Variation

Permitted up to 1 mm for each linear meter of panel edge

Color variation

Permitted

Permitted

Permitted

Lower paper bond strength  and markings of face/core defects on the paper

Permitted for up to 15 mm for knots and 5 mm for splits for total of 2 per sqm.

Permitted for up to 25 mm for knots and 10 mm for splits for total of 5 per sqm

Permitted

Missing paper

Not permitted

Up to 1% of total surface

Up to 2% of total surface

Surface swelling

Not permitted

Not permitted

Permitted up to 1 per sqm with diameter up to 50 mm

 

Characteristics

 

  • Physical and mechanical durability
  • Resistance to moisture and friction
  • Sizes remain stable over time
  • Low level of swelling
  • Multiple panel use when properly used and stored
  • Minimal material loss over time of use
  • Labor cost saving
  • Assures high quality of concrete surface
  • Easy to clean after use
  • Physical and mechanical specification

 

Criteria

Veneer combination value

Poplar/poplar
or beech/poplar

beech/poplar/ beech

1

Density, kg/m3

450-500

550-670

 

 

2

 

Bending module of elasticity, N/mm2:
- Along the wood grain Е║

4900

8000

- Perpendicular to the grain Е ┴


4000

4000

 

 

3

Resistance to bending in N/mm2:
- Along the wood grain Ω ║

40

65

Resistance to bending in N/mm2:
- Along the wood grain Ω ║ 40 65 - - Perpendicular to the grain Ω ┴

30

48

4

Resistance to friction
/Taber – number of rotations/

350-400

350-400

 

User’s instructions

  • Panels should be stored in a dry place over leveled crossbars.
  • Panels should be carefully handled so that the faces and edges are not damaged.
  • Cutting and drilling of the panels to be done with appropriate tools to avoid damaging of the panel surfaces.
  • After cutting and/or drilling, the fresh surfaces should be sealed with water-resistant paint.
  • Prior to using the panels, shuttering oil should be used for easier panel removal.
  • It is recommended upon building the shuttering structure, only specially designed mounting elements to be used.

 Important!

Film-faced plywood is designed to be used 30-50 times.

The effective multiple and cost-saving use is utterly dependent on the proper panel handling and care!

 

Based on the experience, Lessoplast specifies the following recommendations for plywood application which is a guarantee for reliable use under conditions of maximal loading in the building industry.

 

 

No

Support distance,

m

Thickness of film-faced plywood,
mm

Max. recommended thickness of the reinforced concrete slab,cm

1

0.50

21

16 – 20

2

0.50

18

14 – 16

3

0.625

21

12 – 14

4

0.625

18

< 12

Note: Data refers to poplar plywood.

Application

 

In the building industry - for shuttering.

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