M.D.F
A plate created in an industrial process during which sawdust and sanding dust, cellulose fibers or a combination of both are used, after thorough filtering and sifting and drying in the oven, the material is mixed with resin glue and then everything is poured into the mold, the mixture is compressed under high pressure and heated until a uniform and smooth plate is obtained. Such a plate is usually used for cabinets, doors and facades due to its cheap price and high compressibility, it is great for applying and gluing formica, melamine, veneer, polymer and painting in the oven because it does not change its shape over the years unlike solid wood, its disadvantage is its hypersensitivity to moisture, but today there are solutions that improve moisture resistance, a moisture resistant plate will usually be green in color.
Chipboard
Chipboard, or in its Hebrew name - Shavbit, is an industrial wood panel made of wood chips, sawdust and wood waste which are ground together and mixed with a special glue. The mixture is captured and compressed under high heat and tremendous pressure in a process called extrusion (extrusion) at the end of which uniform and flat plates are obtained, the chipboard can be identified by the medium-sized chips, unlike MDF where the chips cannot be seen.
Compared to a sandwich, it is a relatively cheap process, during which the garbage and wood residues are also used. It is simple to produce, very compressed, but also heavier. Used as a substitute for a sandwich mainly when it is necessary to save costs.
Chipboard has a number of disadvantages, it crumbles relatively easily and therefore a melamine coating, veneer or other material is needed, it is desirable to coat the plate in a professional manner so that there is minimal exposure to the environment. The fiber absorbs water, swells, and is destroyed in contact with moisture, so the use of this type of brace should be minimized in humid areas.
O.S.B
A board that, like chipboard, consists of wood scraps with the addition of a dedicated glue, here the process also includes compression and heating of the board, only here the board is made from large mats of wooden strips in a crosswise direction, similar to a sandwich - two and one. The mats are placed on top of each other and glued using wax and synthetic resin under heavy pressure and high heat. Usually, from layers of 15 cm, a plate of only 15 mm will be obtained.
There are several types of USB and the differences are mainly in the adhesives, the types are divided into numbers 1-4
Type 1 non-structural and non-water resistant, type 2 structural and waterproof in the interior, type 3-4 structural and water and moisture resistant, intended for outdoor use and in humid areas.
Plywood
A sandwich is basically a plywood panel made from a tree trunk spread into thin layers. It is possible to combine several types of wood in one pallet, the layers are glued together with a special glue using the two-and-a-half method and under tremendous pressing pressure and high heat. The layers can also be "stitched" to each other, which creates durability over time and does not allow the layers to separate from each other. In high-quality plywood, the layers of wood will undergo a kind of disinfection with a substance that repels insects and pests and therefore must be inspected by the Standards Institute and receive an Israeli standard mark.
Without a standard mark it will be prohibited for use in Israel.
Sandwich types for carpentry, what are the differences and how to choose?
Poplar: This sandwich is not suitable for kitchens at all, all plywood layers are made of poplar wood, a cheap and extremely soft wood and it is preferable not to use it for carpentry purposes - it is easy to recognize by its faded yellow color.
Twin: a brace consisting of two outer layers called gabon (okuma) with a high level of rigidity, but the origin of the inner layers is poplar wood, which is considered a very soft and cheap wood. Twin plywood can be used for carpentry and its quality is considered medium.
Okuma: As you can understand from the name, all the layers of the plywood are made of the gabon wood also called okuma, it originates from the mahogany family and excels at levels of high hardness, its color is reddish brown and it is the most common in Israel due to its high quality, this sandwich is recommended for carpentry and is better than the twin.
Birch: This palette is at the premium level, expensive but extremely high quality, birch (birch wood) is characterized by high hardness and is highly resistant to moisture, used mainly for kitchen and bathroom cabinets and extremely high quality furniture. It can be identified by its light color and its weight, which will usually be 25% heavier than other plywood of the same dimensions. This type is recommended for those who are not willing to compromise on quality over the years and will be prepared to spend a considerable amount.
With us in Alonim, you can purchase all types of pallets and plywood except poplar, you can make cuts to size by prior arrangement and for an additional fee.
We will be happy to be at your service, we are here for you for any question.
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