Masonry Layout

Bubbling, delamination , warping, common problems of plywood hot pressing in China 1、 Bubbling and partial delamination Causes: 1. The moisture content of veneer is too high or the drying is uneven 2. Too much glue 3. The pressure drop speed is too fast or the hot pressing temperature is too high 4. Insufficient resin condensation 5. Insufficient hot pressing …

How to solve the problem of low bonding strength of plywood in China Plywood is a kind of building board that is often used by people. This kind of board is not cut from a large piece of wood, but is glued together by using adhesives. With the progress of technology and the strict requirements of plywood manufacturers, the service …

Quality problems and solutions in plywood production in China In the production process of any kind of product, there will be some quality problems. There are many and complex factors that affect the product quality, including the quality of raw materials, the insufficient precision of processing equipment, or the unreasonable processing technology arrangement. Of course, the other important reason is …

Defects of Chinese Plywood and Their Causes: Structural Defects and Appearance Defects Glue strength defect Low bonding strength The bonding strength of plywood is lower than the specified value of the standard. The reason is that the quality of adhesive is poor; The hot pressing conditions are not well controlled, such as low hot pressing temperature, insufficient pressure or short …

Analysis and Control of Common Quality Defects of Plywood in China At present, China is a big plywood exporter and the largest plywood producer in the world. However, on the one hand, China’s plywood products are frequently squeezed by foreign trade barriers, on the other hand, they are impacted by international advanced productive forces, facing huge challenges and threats from …

Technical Parameters of Ultralam Note: For the production of special batches of Ultralam LVL with high-grade veneer layers (according to the specification), design strength values can be increased by 15 – 20%. CONDITION RELATIVE TO THE GRAIN  Rb  Rs  R  X  I  23,5 ​ 22,5 ​ 22 ​ 3,8 ​ 1,7 ​ 16,5 ​ — ​ 2,6 ​ 1,1 edgewise along the …

Characteristics Average density [kg/m³]550Bending strength: flatwise, parallel to grain [N/mm²]50,00Bending strength: edgewise, parallel to grain (Height: 300mm) [N/mm²]44,00Tensile strength: Flatwise, parallel to grain [N/mm²]36,00Tensile strength: Edgewise, parallel to grain [N/mm²]36,00Compression strength: Flatwise, parallel to grain [N/mm²]40,00Compression strength: Edgewise, parallel to grain [N/mm²]40,00Compressive strength: flatwise, perpendicular to grain [N/mm²]3,60Compressive strength: edgewise, perpendicular to grain [N/mm²]7,50Shear strength: flatwise, parallel to grain [N/mm²]2,60Shear …

Timber in Australia is treated to six levels called Hazard (H) Classes. These treatment levels indicate where the treated product may be used. Hazard ClassWhere the treated wood may be usedWhat the timber is protected againstH1Inside, under cover, protected from the weather and well ventilatedInsectsH1.2**Inside, under cover, protected from the weather subject to moistureInsects and decayH2Inside, under cover, protected from …

Structural Composite Lumber: Laminated Veneer Lumber Laminated veneer lumber (LVL) is produced from veneer and intended for structural framing, where high strength and stiffness are required. Softwoods, such as Douglas-fir and southern pines, are typically used. Some hardwoods are also acceptable. As it is a structural product, only high-quality veneer with high strength and stiffness is acceptable. Unlike plywood, all of …

Treated Birch Plywood meeting the requirements of Euro Class B. Suitable for structural applications. Individual birch veneers are soaked in PW-640 (a fire retardant liquid solution) prior to gluing and pressing. This means that augmented fire retardant performance can be achieved as part of the product’s production process and applies to the entirety of the finished panel. This method of …