Specification
Face: Plain or Melamine Faced
Core: Poplar and Hardwood / Pine and Hardwood
Size: 1220x2440mm and other special sizes according to our clients' requirements.
Thickness: 4 -- 30mm .
Glue: MR, E1, E2 .
MR glue
Melamine formaldehyde glues are not extensively used for plywood gluing but are used where a high-grade bond is required, and where black phenolic glues cannot be tolerated. They are used to fortified urea-formaldehyde glues to increase the weathering resistance of the bond. The largest application of the melamine formaldehyde resin is in the production of decorative overlays.
Urea formaldehyde glues are extensively used for interior and intermediate grade bonding, which covers the majority of hardwood plywood produced. Formulas differ somewhat and can be adapted to meet specific conditions.
WBP glue
Phenol-formaldehyde glues are standard for exterior bonds. With a glue properly formulated for exterior use and suitably employed, no exposure conditions or laboratory testes are known which will degrade hot pressed phenolic glue bonds without destroying the adjacent wood layers. Phenolic glues are also used for impregnating veneers and paper overlays for plywood.
Properties
Density:550-850㎏/m3
Tolerance of density: ≤±5.0%
Diagonal tolerance:≤5mm
Intensity:≥0.35 Mpa
Moisture:5-11%
Formaldehyde emission:≤30mg/100g
Swell rate:< 10%
Exterior structure intensity:≥0.95 Mpa
Bending strength (kg/cm2):180,150
Internal bond (kg/cm2):4,3
Species
1.Normal density particle board
2.Medium density particle board:550-850kg/m3
3.High-density particle board
Uses
It is often used for kitchen tops (which are laminated with melamine) and fire doors, mounting, backing, book making, and constructing. a timber substitute in furniture. Flush doors, tabletops, chair seats. Chipboard with a veneered surface is widely used for flat-pack furniture and work surfaces.
Advantages
Particle board is cheaper, denser and more uniform than conventional wood and plywood and is substituted for them when appearance and strength are less important than cost. However, particle board can be made more attractive by painting or the use of wood veneers that are glued onto surfaces that will be visible. particle board over veneer core plywood is its dimensional consistency and stability.
Disadvantages
All grades of chipboard except the high-density variety tend to soak up water. Once it is water logged, chipboard tends to swell and breakdown. Though it is more dense than conventional wood, it is the lightest and weakest type of fiberboard, except for insulation board. Medium-density fibreboard and hardboard, also called high-density fiberboard, are stronger and denser than particle board. A major disadvantage of particle board is that it is very prone to expansion and discoloration due to moisture, particularly when it is not covered with paint or another sealer. Therefore, it is rarely used outdoors or places that have high levels of moisture, with the exception of some bathrooms, kitchens and laundries, where it is commonly used as an underlayment beneath a continuous sheet of vinyl floor covering. In such an installation the edges must be properly coved upward against the wall and joins and non-coved edges must properly sealed against moisture penetration.