Pressed Wood


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Wood, Pressed

 

a building material, wood subjected to compression at right angles to the grain under pressures as high as 30 meganewtons per sq m (300 kilograms-force per sq cm). Pressed wood has a density of 1,200 to 1,450 kg per cu m; depending on type of pressing, it is designated as compressed from one side or two, or as compressed to contour. One-sided compression is done by pressing beams of wood in a single direction across the grain, and two-sided compression involves pressing in two directions. The second method provides greater density. Pressing to contour is done by pressing a cylindrical stock of wood into a metal cylinder of smaller diameter. The breaking point for pressed wood under static bending or compression with the grain, as well as the hardness of the butt-end surface, is two to three times that of natural wood. Pressed wood replaces ferrous and nonferrous metals and textolite in industry and is used to make loom picker sticks, sliding bearings subject to abrasive wear, and other products.

REFERENCES

Khukhrianskii, P. N. Pressovanie drevesiny, 3rd ed. Moscow, 1964.
Spravochnik fanershchika. Moscow, 1968.

A. N. KIRILLOV

References in periodicals archive ?
This material is also called pressed wood, engineered wood and MDF.
For international shipments, readers say they take steps such as having their pallets treated (49%), using wood pallets they own (19%), and using plastic, corrugated, pressed wood, or metal pallets rather than wood (19%).
For a study of the durability, weatherability and long-term effectiveness of flame retardants based on biomacromolecules (such as proteins, lignin, cellulose and other carbohydrates) when applied to building products such as lumber, pressed wood and wood-plastic composites.
Bookcases and other furniture made of porous pressed wood are usually not salvageable, while non-porous objects like glassware and ceramics are more likely candidates for recovery.
Formaldehyde levels vary with type of construction materials, presence of pressed wood products, type of carpeting and flooring material, and efficiency of heating, ventilating, and air conditioning (HVAC) systems.
Sources of formaldehyde include pressed wood products - such as particle board, hardwood, plywood panelling and MDF, paints, adhesives, varnishes and floor finishes and household products such as wallpaper, cardboard and paper products.
Nelson pressed Wood to say the rate of payment errors the OIG had identified in Carousel Pediatrics' records, stressing that Doug Wilson, inspector general at the Health and Human Services Commission, testified that the average payment error rate for unjustifiable claims investigators have identified is above 90 percent.
Junior Achievement Namibia Country Director, Johanna Cloete said "Phineas saw the need of people in Area 7 for pine wooden beds, chairs and pressed wood cabinets.
People are buying pure papers printed on pressed wood but they are equally getting their news in many other forms.
The millions of pallets that contain pressed wood are also dangerous for repurposing because most engineered wood contains formaldehyde, which is a known carcinogen that eco- and health-conscious people try to avoid.
The company also picks up truckloads of used, broken pressboard pallets and other pressed wood projects.
Some VOCs are even known to be carcinogenic, like benzene in tobacco smoke, perchloroethylene (aka "perc") in dry-cleaning fluid, methylene chloride in paint strippers, and formaldehyde in pressed wood products like particleboard.