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Solid wood composite doors are a trend of indoor doors nowadays, and the price is generally several hundred to several thousand. Why is there such a big difference? Regardless of the process, the most important reason is the core material. The material is solid, the wood is expensive, and the cost is naturally high. If you use some wood slag to glue into a board, you will make a hollow door panel, and the cost is naturally low. The following photos fully illustrate that as long as the wooden door is inferior, you can not enter the red envelope.
In order to prevent everyone from buying such inferior wooden doors, they are deceived, and then sorted out some of the most common door cores, to check which door cores are used to see your door:
1. evacuated particle board
Also called hollow particle board, bridge hole mechanic particle board, the earliest technology invented in Germany, and now introduced domestically. The bridge hole mechanics board uses the principle of the arch bridge hole to process the solid wood sawdust into a unique tubular structure through high-tech process. It can evenly disperse the external force to ensure no deformation. Because the weight is less than half of the solid wood of the same size, the light texture It can also avoid the deformation caused by the hinge and the door cover being too heavy, and prolong the service life. Of course, the above are the original imported standards. As for the current sales of major building materials markets - not to mention the use of solid wood sawdust, I am afraid that the possibility of using waste wood slag is even greater.
As for the soundproofing of Shenma, good insulation performance, etc., it is necessary to test the basis of professional testing! That is, no one can publish it, and it doesn't have to be taken seriously.
In general, the advantages of this type of door core is: should! Generally rented rooms are most commonly used.
2 solid particle board
Generally it is a three-layer composite, the overall performance is better than hollow, and the cost is slightly higher than 1). Qualified goods are basically exported to foreign countries for export. As for domestic sales, most of them are still made of waste wood. In the case of high-quality particleboard, the surface can be directly attached to the veneer or painted, without the need for a layer of MDF.
3. MDF spacer
MDF, also known as fiberboard, is a man-made board made of wood fiber or other plant fiber, using urea-formaldehyde resin or other suitable adhesive. The advantage is cheap, high material utilization, the disadvantage is: high formaldehyde content!
4. Honeycomb paper
The cost of such a door core is the cheapest, and it is mostly used on the paint-free door and the steel-wood door. The quality is quite sturdy and it is not resistant to impact at all.
5. Plywood spacers
Plywood plywood is a three-layer or multi-layered sheet material that is cut from a wooden section into a veneer or cut into thin wood by wood and then glued with an adhesive. Usually, odd-numbered veneers are used, and adjacent layers are single. The fiber directions of the plates are glued to each other vertically. Also called multi-layer board, LVL and the like, the advantage is: cheap! The shortcomings are still the same as 4) high formaldehyde content!
6. Wood file spacer
Equivalent to solid wood blocks, there are fir, pine, nice to call Xiangshan, Douglas fir, are all softwood, the advantages are: environmental protection; the disadvantage is that the hardness is not durable.
Closer wood door core:
In order to reduce the production cost, most manufacturers will increase the gap width of the expansion joints and reduce the amount of wood:
7. Plastic foam
Not much to see, can only say that the insulation is good, but if you know the middle of the door is this thing, it is estimated that the madman will buy it! The right to see is long.
8. Particleboard + wood file composite hollow core
More common in molded doors and all kinds of hollow doors, cheap
In summary, I know that a small door core has a lot of doorways!
So I believe that the so-called cross-section sample in the store, otherwise the door core you bought back may be like this
to sum up:
1. The quality of the core material accounts for a very large proportion of the cost of the door panel. In terms of filling material, it is generally chosen: the Chinese fir is mostly, but if the cost of using good white pine will increase. In order to reduce the cost of filling the substrate, some filler materials are used to make the door core even without drying, which makes the door panel very deformable. Of course, the larger the filling gap, the more material the material is.
2. MDF material is good or bad
3. The thickness and type of natural veneer, common veneer: ash, red oak, red walnut, elm, etc.
4. Wooden door thickness: the total thickness can not be lower than 40mm (European standard is 45mm), it is easy to measure, the tolerance is plus or minus 1mm. But this should be written on the order, how much is how much, a penny of goods.
5. Panel, the thickness of the panel of the composite wooden door should not be lower than 5mm, the tolerance is plus or minus 0.5mm, whether it is MDF or plywood; because the overall strength and flatness of the composite door depends on it, if the thin plate is used, the overall quality will be It is not safe, and if this money is saved, it reflects the quality of this door.
6. Paint accounts for an important proportion of the material and construction costs of wooden doors. The quality of the paint directly affects the texture, feel, and environmental protection issues.
7. Paint thickness in the mass market, generally 0.2-0.4mm thick veneer, the open paint effect is slightly thicker, the difference is not very large; that is not too thin, otherwise it may pass through the bottom, but if the wood grain itself is darker Be careful not to put on such a thick paint.
8. The most important thing to buy a composite wooden door is to know exactly what it is, because the internal structure of the door core is varied, resulting in a wide variety of production costs for the wooden door, and it is difficult for us to understand the internal structure through the customized finished door, so in order to protect ourselves The rights and interests should be provided to the merchant to provide an internal structure drawing, attached to the order contract, as a legal basis (product structure diagram, including the door page, door frame, door line size, material, structure and check the physical object).
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