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Medium Density Board and Plywood as Alternative Materials

Medium Density Board (MDF) is made to cover up some weaknesses plywood surface which is less smooth, easily cracked and broken at widths that are too small and the results of the rough cut. MDF is very smooth material on the surface and inter bond very strong material. Only one weakness compared with a plywood is loss motifs wood on the surface. Currently MDF becomes a favorite material for the manufacture of office furniture and all furniture the sheet-based.
How MDF is made
From the log of wood of various sizes, peeled then logs cut in a certain size. Incidentally at the factory I have seen, logs that are used an average diameter below 20cm and the maximum length of 100cm. Then the cut logs to pass through the process of 'screening' using a powerful magnet to find if there are nails, screws or other metal in the timber. Thing/inanimate object (metal) it can damage the blades on the machine chips and press. Small logs are then inserted into a special machine to be small chips (small pieces). When the chips are still too large will be reprocessed into smaller chips. All the chips that have passed screening process then washed and boiled at a certain temperature and time to become soft. Chips will be soft and tender after defibrator process, and then mixed with wax and glue materials before entering the pressing process. In the production line and the same machine (the machine is connected to 50m long) and then given a mixture of materials and pressure specific heat to obtain the thickness of suitable arrangements. There is a second roller which gives greater emphasis on the material so that you will be able to see that the surface of the MDF top & bottom slightly different glossy level. This is because the difference pressure. MDF then automatically cut to length to the international standard (1220 x 2440mm).
MDF retains the same weaknesses that other types of boards,
1. Water easily penetrate the thick side
2. Screw is less strong on the side of a thick
3. White glue does not work effectively on the surface.
4. Not binding nail as strong as solid wood.
However, the current MDF producers have also been producing waterproof MDF. To what extent is water resistant MDF?

Plywood
What exactly is the plywood? In the Indonesian language is called plywood and in the everyday language of ordinary carpenter called triplex, although it's more than 3 layers. On the other educational institutions called the multiplex, which means several layers. Plywood is made from several thin sheets, or layers of the fiber is drawn across each other between the under sheets to the top sheet together with a special glue under great pressure, so get a certain thickness. Sheets are usually obtained from log peeling process in a rotary system. This process derived from a wide sheets and the length of the small thickness (0.3mm - 3 mm). From construction used to make plywood, the material is highly resistant to the risk of broken / cracked, bent or twisted to depend on thickness. Start from the standard thickness of 3, 4, 6, 9, 12, 15, 18 mm and so on. Initially plywood produced because the need for width boards very large and when using solid wood very high risk to the effects of wood shrinkage (curved, twisted and broken / cracked). However, plywood also has its limitations in the length and width. Excess of plywood is that the durability of wood shrinkage and length-width size that could not be obtained from solid wood in a position similar quality.
But that does not mean durability of plywood has equally strong against the weather. This material is only recommended for equipment in the room (indoor). Greatest weakness in the plywood found on the thick side. Thick side plywood was the most easily absorb water and the surface is very rough. To obtain a good refinement should be added cover to the thick side.

Author : Draker_Ster is the owner of the website which specialists in offering indoor and outdoor furniture.