What is laminated veneer lumber

2023-02-17

What is laminated veneer lumber

Laminated veneer is a kind of structural material which is made of rotary cut thick veneer by gluing, laminating along the grain and pressing.
The production process of LVL mainly includes: veneer peeling, veneer drying, veneer slanting, gluing, paring, pre-pressing, hot pressing, cutting and sawing, stacking and packaging.
The main equipment for the production of laminated veneer lumber include rotary cutters, shears, stackers, dryers, saws, miter saws, pre-presses, and hot presses.

The main tree species for the production of veneer laminated timber: masson pine, eucalyptus, Yunnan pine, larch, poplar, etc.
Main characteristics of LVL: strength, creep, fire resistance, durability, stability, vibration resistance, flame resistance, etc
Laminated veneer lumber (LVL) can be divided into two types: non-structural and structural. Non-structural laminated veneer is mainly used for furniture manufacturing, as the core material or frame of high-end furniture countertops; Small-sized structural materials are mainly used for door and window frames, internal wall pillars and door and window frames
Stairs and other building components; Large-scale structural materials can be widely used in building joists, roof trusses, I-beams and other components, as well as in the roof, structural frames and floor systems of family houses, and can also be used as vehicle and ship materials, sleepers, etc.

The so-called laminated veneer is a high-performance board made of several layers of peeled veneer bonded in parallel with the fiber direction (or several cross-grain veneers can be added). According to the purpose, laminated veneer timber can be divided into structural timber and non-structural timber. The thickness of structural timber is generally more than 50 mm, which is mainly used for making building or packaging load-bearing components; The thickness of non-structural materials is generally 18~45 mm, mainly used for furniture manufacturing and interior decoration.

Masson pine veneer laminated wood is such a typical man-made board, which not only retains the natural characteristics of wood, but also has the excellent performance of man-made board. Its material properties are not inferior to that of solid wood, and it is a good substitute for solid wood. Pinus massoniana is widely distributed from Henan and southern Shandong in the north, Guangdong and Guangxi in the south, Hunan (Cili County) and Taiwan in the south, from the coast in the east, to central Sichuan and Guizhou in the west, and is the main timber tree species in southern China. High economic value, fast growth and beautiful texture. Masson pine wood is extremely resistant to water and humidity, which is said to be "millennial pine in water".

Characteristics of Veneer Laminated Timber of Pinus massoniana
The shape specification can meet the requirements of different sizes and thicknesses of furniture products, and its size is not limited by the log diameter grade and veneer specification. Good processing performance, capable of sawing, planing, routing, drilling, sanding and other mechanical processing, and able to use tenon, glue, nails, connectors and other joint methods.

It can also be used for bending, painting, veneer and other post-processing. The mechanical properties of Masson pine veneer laminated timber can fully meet the requirements of furniture production. Its elastic modulus, static bending strength, shear strength, etc. are better than sawn timber, and the overall level is better than other fast-growing veneer laminated timber. In addition, the material properties are very close to wood, with natural color and texture. On the other hand, Pinus massoniana has sufficient resources and relatively low prices.

Applicability of Masson pine veneer laminated timber

Pine furniture has a large market in Western Europe, North America, Japan, Singapore and Japan, especially the kitchen and outdoor picnic furniture made of pine wood.

Due to the emergence of multi-layer glued bending wood technology, laminated veneer bending wood furniture is easier to conduct multi-directional bending than other wooden bending wood furniture, producing a more delicate and beautiful bending shape. More importantly, the masson pine veneer laminated timber has good nail holding force, and the nail joint structure is very firm.