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High-quality commercial & technical plywoods

Birch Plywood

Birch Plywood: Rotary birch veneer
  • 0.4mm-50mm thick (composites up to 100mm)
  • Stock thickness:
    0.4mm, 0.8mm, 1.5mm, 4mm-50mm
    *** Some thicknesses prefinished in curtain-coated clear lacquer
  • Stock sizes:
    2440x1220mm, 1220x3050mm, 1525x1525mm, 1525x3050mm, 2400x1200mm, 1200x1200mm, 1200x2400mm, 1550x1550mm
  • Special sizes up to 1880x4000mm (standard)
  • Can be supplied raw or precoated with lacquer, oil, melamine or other laminates

Overview

Birch plywood is a well-known, good quality utility plywood panel that has a very good strength to weight ratio, and is relied upon to be stable under various ambient moisture conditions. It is used in various industrial & engineering applications, and used extensively for furniture manufacture & shopfitting.

This product is commonly used where a stable product with a light, blond surface is desired, especially where a relatively low cost is also required.

It is also available as a multilamination product made from very thin veneers, e.g. 0.4mm (3-ply) that can be supplied up to 60mm thick.

In detail

Winwood Products is a birch plywood supplier offering the following configurations/options:

Standard birch plywood

Birch Plywood: Birch throughout plywood

Birch plywood is a high-quality utility plywood product that is used for applications where a very strong & resilient, attractive plywood is required.

It is widely used as the substrate for laminates, veneers, painting and other coatings due to its stability, in such applications such as toy & model making, interior decoration, and in the manufacture of a variety of sports equipment.

This product is most often in its patched form.

  • Quantity:
    • Some stock items available in split pallets, others in single pallet quantity per item
    • Special order items typically in single pallets per item
  • Stock sizes:
    • 2440x1220mm, 1220x3050mm, 1525x1525mm, 1525x3050mm
  • Max size:
    • 1880x4000mm cross-grain
  • Stock thickness:
    • 4mm, 6mm, 9mm, 12mm, 15mm, 18mm, 21mm, 24mm, 30mm, 40mm, 50mm
      (composites up to 100mm)
  • Gluing:
    • Typically birch plywood is bonded with exterior phenolic resin glue
    • Some items are available with interior glue, e.g. to allow laser cutting (mainly 1525x1525mm in full pallet quantities)
  • Finishing:

Thin Birch Plywood - 'Aircraft Plywood'

Flexible Plywood: Thin Birch 'Aircraft Plywood'

A birch throughout product that is manufactured using thin birch veneers and graded to more stringent technical characteristics, thin birch plywood is extremely flexible at its thinner dimensions and extremely stable due to its mutliple layer construction.

It is stocked for immediate delivery in 0.4mm, 0.8mm & 1.5mm thickness, and is regularly used in the manufacture of boats, toys, furniture, lighting & business cards.

Also sometimes commonly known as 'aircraft plywood', this thin birch plywood can be supplied with a standard glueline or a special clear 'flexfilm' compound that offers much more flexibility, to accomodate designs that mean you will be bending plywood to an extremely small radius.

The 'flexfilm' glueline is transparent and allows light to pass right through it unhindered, whereas the standard black glueline tends to add a dark grey tinge to the colour of the face veneers - this is more obvious with the thinner panels. e.g. 0.4mm.

True aircraft plywood must be supported by a certificate to guarantee the panel has passed a inspection to check for allowable core defects - such products are classed as GL1 certified. To meet the strict requirements required, only AB/AB panels can be used. (This higher grade of panel is available to special order in typical minimum 50 sheets per item.)

  • Quantity:
    • Stock items available in split pallets
    • Special order items typically in single pallets per item
  • Stock sizes:
    • 2440x1200mm, 1200x2400mm, 1200x1200mm, 1270x1270mm, 1550x1550mm
  • Standard sizes:
    • 1200x1200mm, 1220x1220mm, 1270x1270mm, 1500x1500mm, 1525x1525mm, 1550x1550mm
    • Min 1.5mm: 2400x1200mm, 1200x2400mm
  • Stock thickness:
    • 0.4mm/3-ply (AB/AB flexfilm), 0.8mm/3-ply (AB/B), 1.5mm/3-ply (BR/BR)
  • Standard thickness:
    • 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 6.0mm
  • Gluing:
    • Typically birch plywood is bonded with exterior phenolic resin glue
    • 0.4mm is stocked with 'flexfilm' bond, which is a clear, interior glue
  • Finishing:

Thin Birch Plywood - Direction of flexibility

Face grades

Standard Birch Plywood Grading

Standard Birch Plywood - B (EN 635-2 Class I):

Birch Plywood: Grade B birch veneer

Faces that may remain visible - ideal for any type of finishing, i.e. clear coatings such as varnishes & lacquer, or pigmented finishes such as paints & other surface coating systems.

Sanded, almost defect-free single-piece face veneer that is clear of all patches. Some hairline cracks and intergrown pin knots to max 6mm dia. (max 3/m²)

(Total number of defects allowed = max. 3)

Standard Birch Plywood - S (EN 635-2 Class II):

Birch Plywood: Grade S birch veneer

Faces that may remain visible - ideal for any type of finishing, i.e. clear coatings such as varnishes & lacquer, or pigmented finishes such as paints & laminates.

As B grade, except may also contain a few pin knots or healthy & live knots without cracks, small, well-done putty repair work that blends well with the rest of the surface, and very light discolouration. Patches allowed to max 1/m².

(Total number of defects allowed = max. 6)

Standard Birch Plywood - BB (EN 635-2 Class III):

Birch Plywood: Grade BB birch veneer

Natural face with colour variations suitable for coating with non-transparent overlays & films, paints, varnishes, veneers, laminates.

As S grade except may contain healthy knots max dia. 25mm (total = 60mm/m²) and patches or filler to repair open defects. (Patches are typically butterfly-shaped but may be oval.)

May also contain light discolouration, good repairs, and some limited glue stains (max 2% of area / 5% @ 24mm + thicker).

(Total number of defects allowed = max. 9)

Standard Birch Plywood - CP (EN 635-2 Class I):

Birch Plywood: Grade CP birch veneer

Commercial face with patches & putty work performed - ideal for non-visible uses and overlaying with heavy laminates.

May contain healthy knots up to 65mm diameter, small loose knots, cracks, bark and overlapping. May also include natural discolouration, glue stains, repairs and any form of putty work and repairs. This is a Russian grading, so patches will typically be oval.

(Total number of defects allowed = unlimited)

Standard Birch Plywood - C/WG (EN 635-2 Class IV):

Birch Plywood: Grade C birch veneer

Plywood face designed for packaging and similar uses where surface appearance is not important.

May contain all the natural wood characteristics and various processing defects, provided these do not compromise the functions of the plywood. (NB: The presence of fungi and metal parts is not allowed).

(Total number of defects allowed = unlimited)

Thin Birch Plywood Grading

Thin Birch Plywood - AB (EN 635-2 Class I):

Thin Birch Plywood: Grade C birch veneer

Almost defect-free surface with some small knots allowed. Minimal colour variance and streaks.

NB: Only this grade can be used for true aircraft plywood.

Thin Birch Plywood - B (EN 635-2 Class I):

Thin Birch Plywood: Grade C birch veneer

Visual grading that allows more natural characteristics of birch than grade AB, such as colour variation.

Thin Birch Plywood - BR (EN 635-2 Class II):

Thin Birch Plywood: Grade BR birch veneer

Allows natural colour variations and mineral streaks often found within birch, along with a limited number of open knots.

Information

Technical Details - General:

  • Tolerances:
    • Length/width:
      Typical: up to 1m @ ±1mm, up to 2m @ ±2mm , 2m & above @ ±3mm
    • Thickness (standard birch):
      Ranges from 4mm @ +0.3mm/-0.4mm to 50mm @ ±1.2mm
    • (Special tolerances by arrangement)
  • Approximate weights of birch plywood:
  • 0.4mm =0.3 kg/m²
  • 0.6mm =0.4 kg/m²
  • 0.8mm =0.5 kg/m²
  • 1mm =0.7 kg/m²
  • 1.2mm =0.8 kg/m²
  • 1.5mm =1.0 kg/m²
  • 2mm =1.4 kg/m²
  • 2.5mm =1.7 kg/m²
  • 3mm =2.0 kg/m²
  • 3.5mm =2.4 kg/m²
  • 4mm =2.7 kg/m²
  • 4.5mm =3.1 kg/m²
  • 5mm =3.4 kg/m²
  • 6mm =4.4 kg/m²
  • 9mm =6.3 kg/m²
  • 12mm =8.2 kg/m²
  • 15mm =10.1 kg/m²
  • 18mm =12.0 kg/m²
  • 21mm =13.9 kg/m²
  • 24mm =15.9 kg/m²
  • 27mm =18.0 kg/m²
  • 30mm =20.0 kg/m²
  • 35mm =23.8 kg/m²
  • 40mm =26.3 kg/m²
  • 45mm =29.6 kg/m²
  • 50mm =33.7 kg/m²