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العربيةMedium Dencity Fibernation
The basis of the combination of wood and resin MDF is pressure and heat, and with increased strength, fire resistance and impermeability have better properties than soft wood. It also has a high machine function, which before that only the hardwares are capable of Mechanical and machine work. MDFs typically have a thickness of 3 mm to 40 mm.
Today, in addition to soft woods, other materials such as stems of cereals, rice, straw, cane, woods and unusable paper, etc., are used for the production of industrial boards. Wood MDF is of better quality than other MDF types. MDF made from sugar cane bagasse is not an exception, but is classified in the category of wood in terms of quality world-class. Compared to chipboard, MDF has a more even mass on the surface of the sheet, it also has surface fineness and surface corrosion and surface modification. MDF is presented as raw and coated. Flat MDFs in office furniture, cabinets, interior decoration Wooden applications are abundant
MDF is a product made from a combination of lignocellulosic fibers with synthetic resins or any other suitable glue. These panels are compressed from a density of 496 to 801 kg / m3 (50-31 pounds per cubic foot) in hot press. The complete interior adhesion of the panel is achieved by synthetic resin and other organic adhesives.
Compared to particleboard, MDF has a more uniform density across the board and more smooth and coarse edges, which can result in better machining. The final product can be flat or with the desired veins of the wood pattern, etc. In this case, the need to be coated (lacquered or laminated) will be highlighted.
(Medium Dencity Fibernation) stands for MDF. MDF is a medium-density fiber that is compactly produced from wood waste and has a high resistance to moisture. MDF is always used as a brain and in-work in the wood industry. What makes the MDF beautiful is a coating that is different depending on the type of work. The most famous MDF veneers are PVC, VINILIUM, HPL, and AMMICA. It should be noted that the formicum is different depending on its thickness.
Therefore, the thicker and more durable coatings in the MDF coating will be made more generous. MDF is a type of fiber that is pressurized and pressurized from compact wood. Now, in most cases, cabinet builders use MDF instead of plywood or chip boards.
But due to the improved quality of the MDF, it is more distinct than other similar products, and it has a particular position because it also has a higher resilient resistance while in the family of hard boards. On the other hand, due to the fact that the MDF surface is smooth, uniform and soft and combines wood fibers of the ligno-cellulose, it is resistant to heat and hardness, and if mixed with other additives, it can help to improve its quality, so that it can be constructed. Kitchen cabinets, furniture, chairs, office furniture, and so on.
MDF can be coated after production. Decorative coatings, in addition to the beauty of the durable, and its application in environments such as the kitchen. Melamine cladding is the most common type of MDF coating, in which the decorative paper is sanded under pressure and heat resin onto the board.
This product has the same properties as other compressed wood binders, which has some of the best properties, which has promoted its market among other compressed wooden sheets such as particle board (chipboard), plywood, hardboard and so on. In fact, this product (MDF) was originally used as an alternative to compact wood enclosures and then used in wood replacements applications. Currently, the scope of applications is increasing day by day.
Among the features that make up various applications (MDFs) are:High Physical and Mechanical PropertiesA wide range of density (specific gravity), thickness and dimensions of MDF can be produced
Knitting tools, machine tools and grinding
Smooth and dense surfaces
Flexibility and smooth edges
There are no disadvantages of wood
Density profile is homogeneous and homogeneous
Ability to perform various rigging, such as wooden and non-wooden cladding, staining and so on
Dimensional stability and compression resistance
Appearance, mild and elegant nature and wood-like scenarios
The price is right
Compare MDF and Letron with natural wood
Following the introduction of MDF and lethron into the wood industry, a dramatic development in the industry has been able to liberate the wood industry from the traditional abyss and limitations and enter the industrial and modern world with higher quality. Here is a brief explanation. We consider the properties of lethron and MDF in comparison with natural wood:
1) Wooden products should be painted and cost and difficult to protect the surface. In the process of staining, chemicals also have a devastating effect on the natural texture of the wood, and after a while the color of the joints The joints are cut or raised in the layered layer. The direct sunlight will also have adverse effects on the wooden surfaces. If the lethron and MDF do not need to stain and have enamel or laminate surfaces that are abrasion resistant , Collisions and sunlight and more are more resistant.
2) MDF and lethron products are made as removable and separable components, which makes it easier to move and protect during transport. If it is in wooden artifacts, this can not easily be done and has some disadvantages.
3) MDF and letroon profiles are made at different levels of the sections and can be changed at any stage of construction, depending on the type of product. While there is more difficulty and more barriers in the process of changing natural wood sections and sectional sections, it requires more time and cost.
Advantages of using MDF instead of chipboard
Due to the uniformity of the MDF structure, the MDF makes it easy to work tools and to make profiles and cuts easily and without loss of MDF. It also has a good surface finish, with a very smooth surface. In the face of moisture, decay, as well as corrosion by insects, including the termite, is completely resistant. It has a longer life span and is resistant to deformation, bending and twisting, and has Acoustic anti-noise properties. MDF is also available in low thickness (2.5mm): Thin MDF or Thin MDF applications can be used on back panels of cabinets, panel panels, partitioning and new uses in the shoe industry, internal parts of vehicles, gadgets Games, blades for electric fans and electric circuits. The use of thick or thick MDF MDF in addition to furniture and furniture, can be used in the construction and construction of columns and arches inside the building. This type of application is due to the MDF’s strength against bending, twisting, and maintaining the bolt.
Needed raw materials
Wood and ligno-cellulose materials, such as wood, sugar cane or bagasse, where wood can be considered as the most important and important raw material of this industry, which requires that any changes in the factors of production and varieties of wood be fully controlled, in order to finally be effective. It should also touch on the quality of the final product. In addition, the following points should be noted:
A variety of wood can be used separately or mixed.
Small diameter wood, branches and waste are suitable for the forest.
Treated chips or sawdust (even as filler)
The use of non-lignocellulosic material, which forms the surplus of crop production and forms a fiber component of one-year plants. Some of these materials, such as cane sugar cane, can be readily available so that they are now depoiled and stored in the southern parts of the country due to self-burning environmental problems, which, if thought possible, Maintaining national capital can bring significant added value.
chemicals
The most important chemical used in this industry is the resin or adhesive that plays the role of the connector. In other words, the most commonly used resin, phenol-aldehyde and urea are aldehyde form, which is proportional to the application of the product The final resin will also change.
Other additives
Includes abrasive materials resistant to moisture absorption, resulting in increased resistance to moisture penetration, or fire protection and fire resistance agents (moreover, direct fire is usually considered). The process of producing and describing the process for the manufacture and production of MDF requires dry wood fibers. These fibers are produced by using conventional pressure regulators under atmospheric pressure and water pressure vaporizers. These equipment will be able to use a variety of wood chips, its various types of waste, so that after cutting and cutting the wood, the round or waste products and, if necessary, the wood chopping, are thoroughly crushed and placed in the sieve for classification. And items that have reached preset sizes are directed to the silos and then placed under baking and steaming to prepare for the Rifanir machine. The adhesive is then directed to the cooling portion. Meanwhile, it should be noted that in the section of silts, wood chips can be recycled and placed in the process, and items that can not be used as waste for collection and for other uses.
One of the issues to be mentioned at this stage is wood yard. In other words, the production of fiberboard pulp production requires continuous feeding, uniform and homogeneous, because otherwise, changes in the quality of the fibers will occur and the quality of the final product will be overshadowed. Gives. To achieve continuous feeding, wood should be homogeneous and homogeneous. On the other hand, in order to ensure continuous feeding at constant speed, it is essential that the raw material is required to be stored for at least several months. (Usually 3 to 4 months), wood yarrow includes wood chips 1 to 2 meters in length cut.