This powerpoint is about wood derivatives about their uses, manufacturing process their properties and etc...,

1. WOOD DERIVATIVES
RAMAJI PRANAV
BACHELOR OF DESIGN -ID

2. PLYWOOD
 Plywood is a panel-shaped wood-based
material made from several thin layers of
wood (the plies or wood veneers) that
are glued crosswise (90 ° angle to each
other) along the grain. This normalizes
material properties such as shrinkage
and swelling behavior. Plywood is
formed from an odd number of veneer
sheets.
 Plywood is produced in different
qualities due to different uses. The
quality of plywood mostly depends on
the gluing or the number of veneer
layers.

3. PROPERTIES OF PLYWOOD
 High Strength and Dimensional Stability
 High Resistance Of impact
 It has the property to resist water and chemical
 Flexibility or Bendability makes to fit for any requirement
 Resistant to fire
 Sound and Thermal Insulation
 Environment friendly it saves the wood wastage
 Durability
 No shrinking, swelling and wrapping

4. PROCESS OF MANUFACTURING
Selection of Log
The first step is the selection of a
good log from selected tree wood
according to the demand of the
type of plywood to be
manufactured. This log is known
as peeler. Peeler is straight and
has a good diameter as large
number of layers are expected to
make from it.
Layer Formation
The large blade is used for
the processing of thin
layers inside sawmill and
made sheets of veneers. A
horizontal placement of log
under blade is maintained
to get a better result.
Continuously blade is
pressed and several layers
are cut into pieces.
Exposure to Heat
The sheets are then exposed
to heat for removing water
content from those. An good
dehydration of sheets is
confirmed before next step.

5. PROCESS OF MANUFACTURING
Gluing
After drying the sheets
those are glued together
maintaining the system of
a different type of
plywood
Baking
The glued plywood primary sheets are
sent for baking and pressing at required
temperature and pressure. The minimum
temperature is 140 degree Celsius and
pressure is 1.9 MegaPascal.
Finishing
Finally, defects of
manufactured plywood sheets
are solved. Holes, pits or any
unfinished edges are given
finishing. Also resizing,
reshaping takes place.

6. USES OF PLYWOOD
 Plywood is used in many applications depending upon the nature of work.
 Floors, walls, and roofs in home constructions
 To make light partition or external walls
 To make framework, or a mould for wet concrete
 To make furniture, especially cupboards, kitchen cabinets, and office tables
 As part of flooring systems
 For packaging
 To make light doors and shutters

7. BLOCK BOARDS
 Blockboard is made up of
softwood strips and veneers. They
are manufactured by placing
softwood strips edge to edge and
sandwiched between veneers and
then this sandwich is glued
together with high pressure.

8. PROPERTIES OF BLOCK BOARDS
 Properties Of Blockboard
 Poor conductor of Sound, Heat, Electricity
 Blockboards are stable, light and easy to cut
 It has good dimensional stability so is highly resistive to wrapping
and cracking. This is the reason why blockboard is used mostly for
manufacturing doors
 It is light in weight than plywood due to its softwood which extend
life span of furniture
 Compare to another competitive material life span of Blockboard is
more than plywood.

9. MANUFACTURING OF BLOCK BOARDS
 1. Slicing
The logs of timber are sliced at first for making the raw of blocks. Strips may be 25 mm.
 2. Rotary Cutting
For outer layer, logs are cut at rotary cutting. Thus veneer for coating is obtained.
 3. Gluing
To attach the slices glue or adhesives are used eg. Urea formaldehyde, Phenol formaldehyde which is called plastic resin. Exterior grade
block board requires phenol formaldehyde. Gluing is done under high pressure.
 4. Drying
The blocks are dried to reduce the moisture as well as water content left inside blocks. For drying the blocks are kept before the sun. The
moisture content is reduced to 10-12%. After proper drying, they are ready for making a sandwich.
 5. Attaching
Blocks are attached together used softwood or hardwood as required for interior or exterior grade required.
 6. Finishing
Final finishing giving lamination, a coating is done.

10. USES OF BLOCK BOARDS
 Block board Application and Uses:
 Nowadays there are many application of block board for
indoor and outdoor furniture, It is normally used for interior
usage, Here the top uses of block board as below:
• Making bookshelves
• To make benches, heavy top tables, and sofas
• To make doors and flush doors with a solid core
• For wall panels
• For door
• For partition walls
• For flooring

11. PARTICLE BOARDS
 Particle board is made by compressing
wood chips with glue. In flat-pressed particle
board, the chips are mainly parallel to the
surface. The chips in the surface layer are
thinner than those in the middle layer, so the
surface of the particle board is denser and
more compact than the middle

12. PROPERTIES OF PARTICLE BOARDS
 Weight and Density: ...
 Strength: ...
 Resistance to Moisture: ...
 Resistance to Warping: ...
 Durability: ...
 Insulation: ...
 Fire Resistance: ...
 Eco-Friendly:

13. MANUFACTURING OF PARTICLE BOARDS
 1.Prepare Raw Material
 Sorting classification of waste wood and removal of metallic and other contaminants
 2.converted into particles
 The material was send to machine to produce chips3. particles dried
 The material was send to machine to produce chips of suitable size and shape
 3,particles dried
 4.particles classified and screening
 Need control particle size in order to make sure the size and position of the particles in right place, small particles on or fine chips for surface, bigger
particles and coarser chips in the core
 particles classified and screening
 of suitable size and shape

14.  5.Blended with resin and additives
 An adhesive or glue will be applied to the surface of particles to bind all together
 6.Particle,resin and additive blend is form into a mattress
 7.Hot pressed to compact the particles together and cure the resin trimming and cutting
 Pre-pressing of furnish to reduce the bulk and give some mechanical strength to the mattress
 Hot-pressing to finally consolidate the board and cure the adhesive
 8.cooled and finished
 Panels need to be cooled before finishing
 After cooling the boards are sanded to the final thickness and to give good surface finish
MANUFACTURING OF PARTICLE BOARDS

15. MANUFACTURING OF PARTICLE BOARDS

16. USES OF PARTICLE BOARDS
 used in flat-pack furniture and for interior
 Used for making cupboard and work
Surfaces
 It is also used for wall and floor pannels
 As web plates for beams
 fixtures and fittings
 as a base material for parquet floors
 as a base material for covering strips

17. MDF BOARD
 Medium-density fibreboard (MDF) is an engineered
wood product made by breaking down hardwood
or softwood residuals into wood fibres, often in a
defibrator, combining it with wax and a resin binder,
and forming it into panels by applying high
temperature and pressure. MDF is generally
more dense than plywood

18. PROPERTIES OF MDF BOARD
 Internal bond strength.
 Modulus of rupture.
 Modulus of elasticity.
 Thickness.
 Elasticity.
 Water absorption.
 Swelling.

19. MANUFACTURING OF MDF BOARD

20. USES OF MDF BOARD
 Medium density fibreboard can also be
utilised as a vapour barrier and
insulation for both homes and
commercial buildings.
 cabinets made of fibreboard and then
finished with solid wood laminate on
top.
 Medium density fibreboard can also
be utilised as a vapour barrier and
insulation for both homes and
commercial buildings.
 This is used in making furnitures
cupboards etc....,

21. Thank you