1mm E0 High Density Fiber Board HDF MDF LDF

1MM E0 CARB P2 High Density Fiber Board HDF MDF LDF
 

High Density Fiberboard (English name: High Density Fiberboard, abbreviated as HDF) is a kind of board made of wood fiber or other plant fiber as raw material, applying urea-formaldehyde grease, or other synthetic resin under the condition of heating and pressure.

The most advanced flat-pressed complete production line in the world. Therefore, the physical properties are higher and better than that of medium density fiberboard. Its density is usually above 800kg/M3. The high density fiberboard produced has reached 930 kg/M3, which has reached the advanced level of similar products in Europe and America. The texture of the board surface is fine and smooth. When the ambient temperature and humidity change, the dimensional stability is good, and the surface decoration treatment is easy. The internal organizational structure is fine, especially with dense edges, which can be processed into various special-shaped edges, and can be directly painted without edge sealing, which can achieve better modeling effects. The organizational structure is uniform and the inside and outside are consistent, so it can be carved on the surface and processed into decorative lines of various sections, which is suitable for replacing natural wood as a structural material.

With its excellent physical properties, high-density fiberboard is compatible with all the advantages of MDF. It is widely used in indoor and outdoor decoration, office, high-end furniture, audio, and interior decoration of luxury cars. It can also be used as an antistatic floor in computer rooms. , wall panels, security doors, wall panels, partitions and other production materials. It is also a good material for packaging. In recent years, it has replaced high-grade hardwood and is directly processed into laminate flooring, laminate flooring, etc., and is widely used in interior decoration. Its smooth surface, solid texture and long service life have won praise from users.

HDF advantages
1. It can continuously and stably produce ultra-thin fiberboard with a thickness of 1mm-9mm
2. The products are aimed at high-end finishes and furniture manufacturers, and the product grades cover E1, E0, super E0, CARB-P2, F★★★★ and zero formaldehyde added ultra-thin fiberboard, etc.
3. High flexural strength and impact strength, small deformation and small warpage.
4. Based on the technical management team, to ensure high-quality product quality service market, reliable quality assurance system and after-sales service
5. High surface gloss, no lint after grinding
6. Light and elegant color, easy to finish, can meet various packaging needs of food and gift boxes

What is MDF ?
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 panels by applying high temperature and pressure. MDF is generally denser than plywood. It is made up of separated fibres, but can be used as a building material similar in application to plywood. It is stronger and much denser than particle board.
The name derives from the distinction in densities of fibreboard. Large-scale production of MDF began in the 1980s, in both North America and Europe.

Properties
Over time, the term MDF has become a generic name for any dry process fibre board. MDF is typically made up of 82% wood fibre, 9% urea-formaldehyde resin glue, 8% water and 1% paraffin wax and the density is typically between 500 kg/m3 (31 lb/ft3) and 1,000 kg/m3 (62 lb/ft3) The range of density and classification as light, standard, or high density board is a misnomer and confusing. The density of the board, when evaluated in relation to the density of the fibre that goes into making the panel, is important. A thick MDF panel at a density of 700-720 kg/m3 may be considered as high density in the case of softwood fibre panels, whereas a panel of the same density made of hard wood fibres is not regarded as so. The evolution of the various types of MDF has been driven by differing need for specific applications.
 

Manufacture
Chip production
The trees are debarked after being cut. The bark can be sold for use in landscaping, or burned in on-site furnaces. The debarked logs are sent to the MDF plant, where they go through the chipping process. A typical disk chipper contains 4-16 blades. Any resulting chips that are too large may be re-chipped; undersized chips may be used as fuel. The chips are then washed and checked for defects. Chips may be stored in bulk, as a reserve for manufacturing.
Fibre production
Compared to other fibre boards, such as Masonite, MDF is characterised by the next part of the process, and how the fibres are processed as individual, but intact, fibres and vessels, manufactured through a dry process. The chips are then compacted into small plugs using a screw feeder, heated for 30-120 seconds to soften the lignin in the wood, then fed into a defibrator. A typical defibrator comprises two counter-rotating discs with grooves in their faces. Chips are fed into the centre and are fed outwards between the discs by centrifugal force. The decreasing size of the grooves gradually separates the fibres, aided by the softened lignin between them.
From the defibrator, the pulp enters a 'blowline', a distinctive part of the MDF process. This is an expanding circular pipeline, initially 40 mm in diameter, increasing to 1500 mm. Wax is injected in the first stage, which coats the fibres and is distributed evenly by the turbulent movement of the fibres. A urea-formaldehyde resin is then injected as the main bonding agent. The wax improves moisture resistance and the resin initially helps reduce clumping. The material dries quickly in the final heated expansion chamber of the blowline and expands into a fine, fluffy and lightweight fibre. This fibre may be used immediately, or stored.
Sheet forming
Dry fibre gets sucked into the top of a 'pendistor', which evenly distributes fibre into a uniform mat below it, usually of 230-610 mm thickness. The mat is pre-compressed and either sent straight to a continuous hot press or cut into large sheets for a multi-opening hot press. The hot press activates the bonding resin and sets the strength and density profile. The pressing cycle operates in stages, with the mat thickness being first compressed to around 1.5× the finished board thickness, then compressed further in stages and held for a short period. This gives a board profile with zones of increased density, thus mechanical strength, near the two faces of the board and a less dense core.
After pressing, MDF is cooled in a star dryer or cooling carousel, trimmed and sanded. In certain applications, boards are also laminated for extra strength.
The environmental impact of MDF has greatly improved over the years. Today, many MDF boards are made from a variety of materials. These include other woods, scrap, recycled paper, bamboo, carbon fibres and polymers, forest thinnings and sawmill off-cuts.
As manufacturers are being pressured to come up with greener products, they have started testing and using non-toxic binders. New raw materials are being introduced. Straw and bamboo are becoming popular fibres because they are a fast-growing renewable resource.

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