Making of Sarkar plywood

SARKAR Plywood is formed when multiple sheets of veneer are glued together face to face so that the direction of the grain on each sheet is at right angles to that of the adjoining sheet. This is known as cross banding and results in a more even distribution of strength over the whole sheet. An odd number of layers is used so that the grain direction of the face and the back are the same.

The advantages of  SARKAR Plywood is as follows:

  • SARKAR Plywood has high uniform strength in all directions
  • The effects of shrinkage and swelling in SARKAR Plywood is minimal
  • SARKAR Plywood can be nailed close to the edges without splitting
  • It is available is many different sizes
  • Curved shapes can be done by using a Jigs or Formers


Cutting the veneers:

The veneers are peeled from selected high density logs and are peeled to suitable sized finished sheets.

Drying the veneers:

The veneers are dried to a moisture content of 8-10%, they are either air, kiln, or mechanically dried in a dryer which varies from size and decks.

Graining and preparing the veneer:

The veneers are graded for use as face centre or backing pieces. Defects such as knots splits and decade areas are trimmed or repaired. If the jointing of veneers is required it is done with immense care and highly skilled labours

Application of glues:

Glues such as Melamine Formaldehyde (MR), Phenol Formaldehyde (WBP) and other Synthetic Resins are applied to the centre layers of the plywood as the layers pass through rollers. To make plywood, alternate sheets of veneer are glued and laid at right angles to the adjacent sheet until the required number of layers is reached.

Pressing:

The assembled veneers are pressed in hot hydraulic presses at a very high pressure. A large proportion of plywood is dried in hot presses. In a hot press the occurring time of synthetic resin adhesives is reduced to several minutes.

Re-drying:

Veneer absorbs moisture when the glue is applied. The moisture is removed by block stacking the plywood sheets and redrying them to moisture content of 8-15%. Either the kiln or air-drying process is used to do this.

Trimming and sanding:

The dried sheets are trimmed to size and then sanded. Multiple sanders or belt sanders are used.


SPECIAL TYPES OF PLYWOOD

  • Film Faced Plywood:

    A phenol film is impregnated into the surface of the waterproof plywood. This makes the surface of the plywood smooth, water tight and resistant to cracking or crazing under severe conditions. When used for RCC and Formwork this reflects to the concrete, which results to smooth finishing.
  • WBP Marine Plywood:

    Selected veneers and waterproof glues are used to make wbp marine plywood. It is used for decking and hulls of boats. Marine plywood is also used in other extremely moist conditions.
  • Shuttering Plywoods:

    Water resistant resin glues in exterior plywoods. These are suitable for places exposed to the weather and for concrete formwork.
  • MR Plywood:

    MR Plywood is used for interior furniture and products which are not directly exposed to heat, cold, water and other climatic conditions. This plywood is made using certain pressure and treatment which makes it very good for home and office use.


material made by Sarkar Plywood Pvt. Ltd.

  • Fancy Plywoods:

    Fancy plywoods have a thin-faced veneer that is sliced from a decorative cabinet timber. It is also ideal as a light and strong covering for framed carcases and flush panel doors when a decorative timber finish is required.
  • Surface decorative plywood:

    Surface decorated plywood has a face veneer, which is grooved or relieved to produce a decorative geometric shape or pattern. It is used in interior feature walls and furniture panelling.
  • Metal faced and pre finished plywoods:

    A thin metallic sheet (aluminium, copper or lead) provides a hard, smooth and non- corrosive shield for the core of this plywood.
  • Composite plywood:

    Composite plywood is metallic faced plywood, which a core of insulating metallic of polystyrene foams. It is ideal for panelling cold room walls and caravan.


HARD BOARD

Hardboard is made from hardwood timber, which is unsuitable for conversion to swan timber. The timber is chipped and the wood fibres are completely separated.

TYPES OF HARDBOARD

  • Standard:

    Standard hardboard is used for interior work such as lining walls for flush doors and cabinetwork.
  • Tempered:

    Tempered hardboard is oil impregnated to increase its water resistance it is suitable where moisture is needed.
  • Perforated:

    Holes or slots are punched into hardboard to perforate it. It is used for display panels or storage walls. Pegboard is an example of perforated hardboard.
  • Patterned hardboard:

    This hardboard is impressed with a pattern. The board is usually patterned to imitate leather or wood grain walls or for panels in furniture or doors.


SOFT BOARD

Waste sugar cane fibres are now used to make low density insulated board. Pulped soft wood fibres of radiata pine are used to make high-density board.

TYPES OF SOFTBOARD

  • Standard:

    Standard soft board is used for lining walls, ceilings and making pin-up boards. It is available in either plain or ivory-faced sheets.
  • High density:

    High-density soft board is used as an underlay for carpets or linoleums.
  • Low density:

    Low-density soft board is used for insulating the walls and ceilings of cool rooms and refrigerators to a thickness of 100 meters.
  • Acoustic tiles:

    These low-density soft board slabs have an ivory finish and a perforated surface, which absorbs sound. Acoustic tiles are ideal for lining ceiling and walls of theatres and workshops.

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