Pallet Foot Bearer Hollow Tubular Particle Board

Pallet Foot Bearer Hollow Tubular Particle Board Hollow particle board, also known as bridge mechanical board, is an innovative door core board manufacturing technology.  Hollow particle board as a door core board manufacturing process innovation, has become the strength of the inner door manufacturer's products a highlight. Bridge mechanics plate using the principle of arch bridge, through high-tech processing, the solid wood sawdust into a unique tubular structure, it can be distributed evenly and ensure no deformation, because the weight is less than the same size of the solid board half, light texture can also avoid hinge and door cover is too heavy and caused by deformation, prolong the service life. At the same time, the mechanical plate also acts like a thermos to effectively prevent the diffusion of temperature and keep a pleasant temperature in both winter and summer.  1. Excellent physical performance The density of bridge mechanical board is 0.35-0.55g/cm3, while that of flat pressed door board is about 0.75g/cm3. It can be seen that the density of bridge mechanical board is lower than that of flat pressed particleboard. Therefore, the mass of door core plate can be greatly reduced by up to 60 % by using bridge mechanical plate. The mechanical board of bridge tunnel has good thermal insulation and sound insulation performance. The hollow board of 40 mm thick is equivalent to the thermal insulation effect of 300 mm thick brick wall, and the sound insulation is as high as 28 decibels. Its compression performance is good, under 2MPa pressure, will not produce deformation; Due to the particularity of the manufacturing process of the bridge mechanical plate, the water absorption expansion rate (TS) of the product in the thickness direction is very small, almost comparable to the radial deformation of wood. Although the longitudinal static bending strength of the bridge mechanical plate produced by extrusion method is very low and the water absorption expansion rate in the length direction is high, the longitudinal static bending strength can fully meet the national standard requirements of ordinary particle board after using 3mm veneer. At the same time, the bridge mechanical plate is only used as the core plate, which has certain requirements on its thickness. It will be veneered when used, and it is only used in a dry environment. The water absorption expansion rate in the direction of the length will not affect its use.  2. Low manufacturing cost In terms of raw materials: the density of bridge-hole mechanical board is far lower than that of flat-pressed particleboard, and the raw materials used for making the same volume of board are far less than that of ordinary particleboard. If urea-formaldehyde resin is used as the adhesive to manufacture particleboard, the sizing amount of qualified flat-pressed particleboard is 10%-12%, while the sizing amount of bridge mechanical board is only 4%-8%. Visible, in terms of raw materials, bridge mechanical plate can also greatly reduce the manufacturing cost of plate. Equipment: Because the extrusion method is produced by the extrusion head of the extruder to control the feeding amount of the extruder, and the plate thickness is controlled by the hot pressing plate, although the single production efficiency of the extruder is relatively low, but compared with flat pressing particleboard, the extrusion method does not need special laying machine, prepressing machine, slab transport machine, slab acceleration transport machine. The shavings mixed with glue can be directly sent to the extruder by the silo. Less equipment is required for the production of bridge mechanical plate, and its operation cost and equipment maintenance cost will be reduced.  3. Simplify the technological process The bridge mechanical plate produced by extrusion method can be directly sent to the extruder for extrusion molding without paving and prepressing after the sizing of raw materials. It can be seen that compared with the flat pressing method for the production of particleboard, the extrusion method for the production of bridge mechanical board can avoid the two processes of slab paving and prepressing, thus simplifying the process flow.  4. Reduce the free formaldehyde release of the plate The most troubling problem with wood-based panels is the release of free formaldehyde. Free formaldehyde comes from two parts: 1) the formaldehyde release of wood itself. 2) Formaldehyde not involved in the reaction in urea-formaldehyde resin adhesive, formaldehyde released in the process of hot pressing and in use. And its fundamental, the main reason is the use of urea-formaldehyde resin adhesive. Although the free formaldehyde can be reduced by formaldehyde trapping agent, lengthening hot pressing time, plate post-treatment and other measures, it will increase the manufacturing cost of the plate. The door panels produced by extrusion method can be produced with the urea-formaldehyde resin adh