Oriented strand board is often referred to as OSB. As a newer engineered wood product was born in North America in the 1980s. After more than 30 years of product and market changes and developments in North America, OSB has successfully become one of the main structural panels. Although OSB was produced and distributed in North America in the past, we now see his growth in Europe and growth in the world market.
The origin of OSB
OSB is developed from the waffle board (large board). The waffle plate is made of a large piece of film with a thickness of less than 1 mm, which is processed by a phenolic resin glue, a disordered paving, and a hot press forming process. The development of the waffle board provides the possibility and research direction for further improving the performance of the board. The OSB was born after the process of processing the flaking and vertical cross-laying. The upper and lower skin layers of OSB each account for 25% of the total amount of flakes, and the core layer accounts for 50%. The flakes of the upper and lower skin layers are laid parallel to the length direction, and the core laminations are laid perpendicular to the length direction.
After the OSB was introduced to the market, the new structural sheet was applied in the market for building structural materials based on traditional material plywood.
From the early development of the waffle board to the wide application of OSB, it has experienced many changes after the plate festival and the continuous improvement of the manufacturer and the performance of the plate. One of the important factors in the use of adhesives. In North America, liquid or sub-packaged phenolic rubber OSB still plays an important role in the industry. The Tai Group is a major supplier and technology supporter. MDI (diphenylmethane diisocyanate) is more used as a core layer adhesive because of its fast curing and better aging resistance. In Europe, the situation is somewhat different. Mainly due to the difference between the end user and the market. Here, MDI is the dominant position in the core layer. Although some factories use phenolic glue as the surface glue, the confocal application of melamine-urea-(phenol) "MUF(P)" is more widely used.
In North America, liquid phenolic rubber accounts for about 75% of the total amount of OSB produced by phenolic rubber. Liquid glue has better sizing uniformity than powder. Since the liquid glue has a lower combined force than the powdered rubber, the contest must be relatively increased. The application of liquid glue over powdered rubber depends on environmental protection, cost, and the ability to increase the amount of glue applied according to requirements.
OSB development prospects
Since the introduction of OSB in the 1980s, market demand has been less than one billion square feet (9.29 million square meters). More than 20 billion square feet (185 million square meters) by the year 2000. The growth rate of this anomaly is due to the increased consumption of laminates and the application of more new users. In North America, the next three to five years are expected, and despite the current slowdown in economic growth, we can still see the continued growth of OSB. Production capacity in Europe is rapidly expanding to meet market demand.
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