Raw_Hardwood_Plywood_Board
Plywood is made of odd number of glued veneer sheets depends on differnet thickness requirement. The veneer sheets are pressed and heated – glue dries under the influence of the heat and joins the veneer sheets together. Afterwards plywood is cut to size and sanded if needed.
The direction of grain pattern of every next veneer sheet is perpendicular to the previous one.
Outer veneer sheets have the same direction of grain pattern. Such combination provides maximum stability to the plywood sheet.
Plywood is produced of various tree species. In the region of Europe common raw material is birch, poplar From hardwood and pine and spruce (conifer). Depending on raw material there may vary certain technical indicators and color of plywood.
Plywood can be classified on several different criteria: e.g. tree spiece of raw material, glue type, level of water resistance, plywood grade etc.
There are Interior and Exterior Plywood types
Exterior (WBP) plywood is suitable for use in external conditions. The glue used in this type of plywood (phenol-formaldehyde resin) is a water-resistant.
Interior (MR) plywood is suitable for use in dry indoor conditions. The binder is urea-formaldehyde resin
How to visually distinguish exterior and interior plywood?
There is also Sanded or unsanded plywood
Uncoated plywood is produced with either a sanded or unpolished surface.
Sanded plywood is produced in different quality grades:
- The quality grades for plywood with interior glue are I, II, III
- The quality grades for plywood with exterior glue are E, B, S, BB, CP, WG
Unsanded plywood is produced also either with interior or exterior glue:
- The quality grade for unsanded plywood with interior glue is IV
- The quality grade for unsanded plywood with exterior glue is C
Description
Type:
Uncoated : Glue MR & Glue EX
Dimension:
Standard sizes (mm)
1525×1525 – Interior vineer
2440×1220 – Exterior vineer
2500×1250 – Exterior vineer
1525×3050 – Exterior vineer
Standard thickness (mm)
Interior Dimension: 3; 4; 5; 6; 8; 9; 10; 12; 15; 18 & 21mm
Exterior Dimension: 6; 6,5; 8; 9; 10; 12; 15; 18; 21; 24; 27; 30; 35 & 40mm
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