One the most ESSENTIAL core product in the wood manufacturing industry in India are PLYWOOD & HDHMR boards. Particle Boards are generally used in large scale bulk manufacturing industries. So, lets find about more about it!
Plywood
Plywood is a widely used engineered wood product, created by gluing together thin layers of wood veneers. Each ply is bonded with its grain running at right angles to the adjacent layers, providing exceptional strength and stability.
What is HDHMR Board?
HDHMR, or High-Density High Moisture Resistant board, is a type of engineered wood. It's created by compressing hardwood fibers with a special adhesive under high pressure, resulting in a dense, durable, and moisture-resistant board. This makes HDHMR perfect for applications that require robustness and resistance to moisture, such as in kitchens, bathrooms, and other high-moisture environments.
What is Particle Board?
Particle board is a type of manufactured wood product created by combining wood chips, sawmill shavings, or sawdust with a synthetic resin or another adhesive, and then subjecting them to compression. While it is lightweight and affordable, it lacks the strength and durability of plywood or HDHMR. Its lower density makes it susceptible to damage from moisture and heavy objects.
STRENGTH
The Strength of Plywood compared to HDHMR (High-Density High Moisture Resistant board) and particle board is typically measured by evaluating their structural integrity, load-bearing capacity, and resistance to stress. Here are some key points:
Structural Integrity: Plywood is made from thin layers of wood veneer glued together with alternating grain directions, which enhances its strength and stability. HDHMR is made from compressed wood fibres, making it denser and more moisture resistant. Particle board is made from compressed wood chips, making it less strong and more prone to damage.
Load-Bearing Capacity: Plywood is known for its superior load-bearing capacity and is often used in construction for flooring, roofing, and walls. HDHMR also offers high strength and is suitable for areas exposed to moisture, such as kitchens and bathrooms. Particle board, on the other hand, is not suitable for weight-bearing applications as it tends to sag or split under heavy weight.
Resistance to Stress: Plywood's cross-grain construction provides better resistance to warping, cracking, and impact. HDHMR is highly resistant to moisture and humidity, maintaining its structural integrity even in demanding environments. Particle board is more prone to damage when subjected to stress and is not moisture resistant.
In summary, plywood is generally stronger and more durable than both HDHMR and particle board, making it the preferred choice for cabinetry requiring structural strength
Cost
HDHMR Board: Generally, more expensive than standard plywood because of its advanced manufacturing process and enhanced properties like higher density and moisture resistance.
Plywood: Offers a more budget-friendly option with adequate performance for many applications, making it a versatile and economical choice for various projects.
Application
Cabinetry
HDHMR: Perfect for kitchen and bathroom Shutters where surface evenness or moisture resistance is crucial.
Plywood: Commonly used for cabinet carcass but may need additional treatment (BWP Grade) in moisture-prone areas.
Wall/Ceiling Panels
HDHMR: Provides a high-quality finish for decorative panels and partitions which is finished using pigmentation processes such as Paint/Deco/Pu
Plywood: Versatile for various interior solutions, including wall paneling and false ceilings where laminate/Veneer is used for surface finishing
Installation and Workability
HDHMR Sheet vs. Plywood: HDHMR board is heavier and denser, requiring specialized tools for cutting and shaping. Plywood is easier to cut and shape with standard woodworking tools.
FAQs
1. What type/grade of Ply is used by HK?
We use Mixed Core Ply. We get the ply’s manufactured with our specification with manufacturers across state.
2. What is the thickness of the Ply?
We use various thickness of plywood. Primarily, it’s a 16mm & 18mm ply which has core Veneer with Surface veneer being Gurjan/Okuma face which is calibrated.
3. What should be main components going into your ply?
Wood used in ply core generally are Eucalyptus, Mango, Neem etc (Core ensures density & strength of a plywood)
Surface ply used (surface ensures bond strength between pasting of surface material like laminate, acrylic veneer etc.
Adhesive (Adhesive ensures bond between ply surface & laminate/Acrylic etc)
4. What is Calibrated Plywood?
Calibrated plywood maintains consistent thickness throughout, achieved through modern high-end machine calibration. Its uniform thickness makes it an ideal panel product for mechanized automated furniture manufacturers.
5. Why do we use Customized Plywood?
We use customize ply for quality control measures & to have a product that balances QUALITY VS AFFORDABILITY. Also claiming warranty for 3rd party products becomes a very cumbersome process as the ply is pasted with Laminates on both sides.
6. Can Plywood be Harmful & have negative HEALTH Benefits?
Plywood is produced with resin bonds (Chemicals) which range from those suitable only for interior use to those which will withstand elevated levels of humidity in external exposure.
Typical adhesives used are: •
· Urea-formaldehyde (UF) are Inexpensive but Toxic
· Phenol-formaldehyde (PF) are Moderate price but harmful
· Melamine-urea-formaldehyde (MUF) are expensive but least Harmful
7. What is the warranty of Ply?
Warranty on our Plywood is 20 Yrs. but warranty is aligned to Standard & Life Time Warranty terms only
8. What standards do we follow?
Our product manufacturers adhere to
a. IS 303 for Moisture Resistant Plywood.
b. IS 710 for Boiling Waterproof Plywood.
c. IS 848 Standard for Adhesive
9. Why don’t we use third party ply?
We don’t use third party ply because of the specifications each plywood manufacturer comes with and the cumbersome warranty claiming process. Price as per specification doesn’t not justify the balance between materials used.
Eg: A manufacturer which produces board medium to high density may use least expensive adhesive to keep the cost in check or may not calibrate the plywood affecting the finishing of panels
10. Does plywood bend?
Yes! Plywood may bend, usually because of one of two reasons..
Moisture difference between the two faces of the plywood panel.
This is a very common occurrence. While stacking up plywood panels. the uppermost panel’s upper face is left exposed, while its other face side is unexposed in the stack. If the moisture content of the surrounding is higher than the plywood moisture content, the exposed surface tends to absorb moisture which in turn leads to expansion of that surface. All this time, the other surface facing down is not exposed and therefore does not absorb moisture. So the asymmetric expansion of the upper surface without any supporting expansion on the other side leads to bending of the ply.
Sticking laminates only to one side of the ply
So, Plywood is basically manufactured by pressing together an odd number of layers of wooden core veneers which are placed at right angles every alternate layer to structurally reinforce the long grains of the wooden core in a kind of wire mesh structure format. Now theses layers are always kept odd to maintain balance of the ply as both the outer side of the ply is made with long grain veneers. Now sticking a laminate only to one side of the ply disrupts this balance and puts more weight on one side than the other which ultimately leads to the ply bowing in shape. Can be easily rectified by sticking a plain sheet of laminate on the other side as well to balance out the weight.
11. How can bends be corrected?
Bends on shutters can be corrected by shutter straighteners
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