Today's Focus: Blockboard Expert Opinion: Lu Bin, Director of the National Quality Supervision and Inspection Center for Wood-based Panels and Wood Bamboo Products Product Overview Blockboard, also known as large-core board, is a type of panel made by coating rubber and hot-pressing natural rotary-cut veneer with solid wood boards. It is one of the most commonly used wood-based panels in interior decoration due to its attractive appearance, high strength, lightweight, and minimal deformation. Blockboards are widely used in furniture manufacturing, doors and windows, ceilings, flooring, and wall paneling. A standard blockboard consists of three main parts: the surface plate, the core plate, and the core. The surface plate is the outer layer, the core plate lies between the surface and the core, and the core is typically made up of wooden strips or structural boards that provide the board’s internal framework. Blockboards can be classified based on their usage environment, purpose, number of layers, and formaldehyde emission levels. There are indoor and outdoor blockboards, general-purpose and construction-grade varieties, and options like three-layer, five-layer, or multi-layer boards. In terms of formaldehyde emissions, they are categorized into E0, E1, and E2 grades, with lower values indicating better environmental performance. Key Performance Indicators 1. Formaldehyde Emission: According to national standards, E0 grade blockboard must emit ≤0.5mg/L, E1 ≤1.5mg/L, and E2 ≤5.0mg/L. Many products on the market fail due to excessive formaldehyde release or incorrect labeling—some labeled as E1 but actually meet only E2 standards. 2. Lateral Static Bending Strength: This reflects how well the board resists bending and deformation. Poor quality raw materials, improper splicing during production, or weak bonding can all lead to low bending strength. 3. Glue Bond Strength: This depends on factors like time, temperature, and pressure during the gluing process. Too much or too little adhesive can affect both glue strength and formaldehyde levels. 4. Moisture Content: Excessive or uneven moisture can cause warping or deformation during use, which directly affects product durability and performance. Shopping Tips 1. Check the Surface: Look for a smooth, even surface without defects. The board should be flat, with no warping. When standing upright, the corners should be straight, and the diagonal difference should not exceed 6mm. 2. Inspect the Edges: Examine the core board thickness and whether it’s uniform. Ensure there are no gaps, overlaps, or signs of decay. Also, check for any excess glue or putty around the edges. 3. Measure the Size: Confirm that the thickness matches the nominal size. Variations may indicate poor quality. 4. Test the Glue: Cut a 75x75mm sample and soak it in 63°C water for 3 hours. If the glue layer separates, the board may not be of good quality. 5. Assess Environmental Safety: Store unused boards in a small room for 24 hours, then check for strong odors. A pungent smell could indicate high formaldehyde levels, which may harm health. 6. Consider the Price: E1 grade blockboard usually costs over 100 yuan, while E0 grade is above 130 yuan. Extremely low prices may signal substandard quality. Strainer Lever Indicator Sight Glass and Other Accessories Level Meter is used to measuring the medium level in the vessel, plastic level meter is designed for corrossive liquid. Sight Glass is used for observe the medium in the pipe system, plastic sight glass made by PVC, CPVC, PVDF, PP body and borosilicate glass. Strainer used for filter the impurities in the pipe to ptotect pump, valve and equipment function well. Compensator made by steel flange and PTFE or rubber body to protect the pipe moving or deformation caused by pump shaking or pipe material shrinkage. PTFE and rubber EPDM Gasket is used to seal the flange connection. Plastic fastener is used for corrossive environment, for different application, RMI PLAST() offer PVC, PVDF, PP level meter, PVC, CPVC, PVDF, PPH sight glass, PVC Y strainer, PTFE, EPDM compensator and gasket, PVC, PP, PVDF, PA6 bolts and nuts. Level Meter,Strainer,Gasket,Fastener Ningbo RMI Plastic Co.,Ltd , https://www.rmiplast.com