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Common Quality Problems of Building film faced plywood and Solutions

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Common Quality Problems of Building film faced plywood and Solutions



Installation and use of film faced plywood is an important part of modern building construction. Installation quality and efficiency have a great influence on concrete quality and performance, and have a direct relationship with the whole building quality and performance, so its importance need not be said much.Common quality problems of film faced plywood include many reasons of production process, but besides production process, manual maintenance also has a great impact on the quality of film faced plywood.To get more news about Medium density fibreboard, you can visit boosterplywood.com official website.

It is very important to choose a good film faced plywood, such as medium iron green super-strong composite film faced plywood, film faced plywood core vertical structure, board surface polymer waterless fiber, high strength, impact resistance, wear resistance, long service life, high turnover rate.
Solutions: 1. Because of the large area, it is not easy to repair. Tear the veneer off, scrape off the residue and re-paste. 2. When the veneer is over-pasted, the moisture content of veneer should be controlled at 12%-14%.
Reasons: 1. No glue was applied locally. 2. The hot pressing time is too long. The glue has been coked. 3. The moisture content is not uniform.

Solutions: 1. Overglue and hot pressing should be uniform; 2. Use sharp cutters to cut the thin wood along the wood grain or inject the glue into the bubbles with a thick-headed syringe, and then press it flat with an iron; when the bubbling area is large, remove the veneer, scrape the residual glue, re-glue the adjacent veneer, tighten the periphery of the patch; 3. Veneer or the core of the veneer. The water content should be uniform.
Reasons: 1. The surface of the base material itself is uneven; 2. The thickness of the rubber layer is uneven, and the excess glue is not extruded during hot pressing.

Solutions: 1. It is difficult to repair. In serious cases, the veneer can be planed off again and the surface of the parts can be repaired. 2. Extrude the surplus glue to form a thick and uniform glue layer during hot pressing.
Reasons: 1. The glue is too thin and the glue amount is too large; 2. The veneer thickness is not up to the standard; 3. The veneer structure causes (the duct is too big); 4. The veneer moisture content is too high; 5. The unit pressure of the glue is too high.

Solutions: 1. Adjust the viscosity and amount of adhesives, the weight ratio of adhesives is based on the principle of PVAc + flour > UF; 2. Use thin wood with a thickness of more than 0.6 mm to avoid penetration; 3. Select trees with smaller ducts; 4. Veneer moisture content should not be too high; after wet cloth rubbed, it should be pasted naturally and sprayed less before hot pressing; 5. Extend ageing. The unit pressure should be controlled between 0.5 MPa6 and 1.0 MPa6, slightly scraped or abraded with a knife, and severely removed and re-pasted veneers.

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