Plywood production requires a good log, called a peeler, which is generally straighter and larger in diameter than one required for processing into dimensioned lumber by a sawmill. The log is laid horizontally and rotated about its long axis while a long blade is pressed into it, causing a thin layer of wood to peel off (much as a continuous sheet of paper from a roll). An adjustable nosebar, which may be solid or a roller, is pressed against the log during rotation, to create a "gap" for veneer to pass through between the knife and the nosebar. The nosebar partly compresses the wood as it is peeled; it controls vibration of the peeling knife; and assists in keeping the veneer being peeled to an accurate thickness. In this way the log is peeled into sheets of veneer, which are then cut to the desired oversize dimensions, to allow it to shrink (depending on wood species) when dried. The sheets are then patched, graded, glued together and then baked in a press at a temperature of at least 140 °C (284 °F), and at a pressure of up to 1.9 MPa (280 psi) (but more commonly 200 psi) to form the plywood panel. The panel can then be patched, have minor surface defects such as splits or small knot holes filled, re-sized, sanded or otherwise refinished, depending on the market for which it is intended. Plywood for indoor use generally uses the less expensive urea-formaldehyde glue, which has limited water resistance, while outdoor and marine-grade plywood are designed to withstand moisture, and use a water-resistant phenol-formaldehyde glue to prevent delamination and to retain strength in high humidity. Video Credit: www.westfraser.com Join 'Engineering World' like many others to get access to special perks: https://www.youtube.com/channel/UCh2wZoBynUkHmTX2GOwAKKg/join Also, kindly consider subscribing to our channel if you liked the video: https://geni.us/SubscribeChannel Watch some of our other interesting manufacturing videos: How Cement Is Made? https://youtu.be/RcrMBYsB93E How LUXURY Rolls-Royce Cars Are Made ? https://youtu.be/BVvnSzMqI3M How Jigsaw Puzzles Are Made? https://youtu.be/nylElsB9MkE

Follow the story of logs that arrive at our sawmill in Longview, Washington — from the log yard through the merchandiser; then cut into boards and trimmed for length; sorted and stacked; finished to exact dimensions in the planer mill; scanned and graded; stacked, squared and strapped, and then shipped to our customers by truck, train and ocean vessels.

From carbon capture to coffee tables, trees are a vital part of all our lives. Confor is a membership organisation that supports sustainable forestry and wood using businesses. Head to http://www.confor.org.uk to see how modern forestry balances wood production with recreation, environmental sustainability and wildlife conservation.