MUF glue is a condensation product of melamine, urea and formaldehyde. In this case, the glue used for manufacturing formwork plywood can be A-bond, B-bond or C-bond. UF is also the most widely used glue in the plywood industry. Phenolic adhesives are used commonly in wood bonding. Urea formaldehyde, phenol formaldehyde and melamine formaldehyde binders and adhesives are primarily used for: Engineered wood products such as plywood, particleboard, fiberboard and oriented strand board Industrial products such as abrasives, foam insulation, refractories and molded components Phenol Formaldehyde Resin for WBP Grade Plywood This resin when mixed with filler gives a glue mix suitable for the production of exterior plywood. WBP is only a kind of bonding property / feature of glue . The Effect of Nanocellulose Addition to Phenol-formaldehyde Adhesive in Water-resistant Plywood Manufacturing This study examined the effect of applying cellulose nanoparticles as a filling material for phenol-formaldehyde (PF) resin in the process of manufacturing water-resistant plywood. The resultant bond quality will surpass the following international plywood standards namely British Standard, BS1455-WBP (Weather and Boil Proof) grade and Japanese Agricultural Standard, JAS Type 1. The weather and boiling water resistant bonding meets the requirements of the following standards: rd EN 314 / 3 class; BS 1203 / H 4 (previously WBP) DIN 68705 Part 3 / type BFU 100; Formaldehyde emission And then do the glue bonding quality test to Check the results. Tel: 008618551862006 Epoxies and elastomers are used to a much lesser extent. As a plywood manufacturer in China, we use three types of glue in practice. Formaldehyde Emissions. Investigation of a Formaldehyde-free Cottonseed Flour-based Adhesive for Interior Plywood Nairong Chen, a,b Jian Huang, b and Kaichang Li b, * A new formaldehyde-free wood adhesive, primarily composed of defatted cottonseed flour (CF) and polyamine-epichlorohydrin (K736) resin, was investigated for the preparation of interior plywood. If you use WBP glue for the plywood / film faced plywood, the panel will can be exposed to weather, water and moisture for a long period (some maybe permanently ) without delamination . Adhesive resins for wood bonding composite panels, structural panels, MDF, OSB, particleboard, hardboard, plywood, and LVL. my email : n******@******.vn. Fillers should be added into the PF glue. Require high temperature and high pressure for production. In plywood business , a lot of people sell / buy WBP plywood / film faced plywood . Urea-formaldehyde (UF) adhesives are thermosetting, cost-efficient polymers, mainly used for interior applications. 35 Tsinghua East Road, Haidian District, Beijing 100083, P. R. China It is a colorless, pungent gas and common volatile organic compound (VOC). Haven't found your required  plywood or  film faced plywood  ? US3213045A US5966160A US3213045A US 3213045 A US3213045 A US 3213045A US 5966160 A US5966160 A US 5966160A US 3213045 A US3213045 A US 3213045A Authority US United States Prior art keywords resin viscosity bark adhesive reaction Prior art date 1960-09-30 Legal status (The legal status is an assumption and is not a legal conclusion. It should be noted that the length of time plywood can withstand boiling water without delaminating is not only dependent on the glue – it also depends on the grade of veneers and pressure. PVA or PVAc is short for Polyvinyl acetate. Plywood production process: veneer peeling, drying, glue spreading, veneer composing, cold press, hot press, trimming, sanding, lamination, quality control and packaging. Technical methods to keep large size plywood in good shape after production and in use. Nanjing,China 210012. The quality of MUF depends on the mol ratio of urea and melamine. If you want to know what’s E1, E2, please read this : the Limit of Formaldehyde Emission of Wood Based Panels . Formaldehyde is a chemical compound with the formula CHOH or CH2O. The best WBP (phenolic) glue can be regarded as permanent adhesives.But the water boiled proof period of plywood is depended on not only the quality of WBP glue, but also the craftsmanship of production. WBP glue is phenolic glue only.it that right. 6500 ,5400, 5200 x 2500 or 2000 mm x 19, 21 mm 120/180/200/240/360/450 gr/m² film Polyvinyl acetate is used for the manufacturing of low formaldehyde plywood. METHODS: Formaldehyde and phenol were monitored in the workplace air. Few panels made in the laboratory using phenol formaldehyde resin incorporated with fire retardant chemicals, and veneers treated with fire retardant chemicals are being tested. If the samples have not delaminated in boiling water for a long period, then we will can say the plywood samples have WBP property and conclude that the samples are WBP plywood samples . Eco-Friendly Phenol−Urea−Formaldehyde Co-condensed Resin Adhesives Accelerated by Resorcinol for Plywood Manufacturing Bo Pang,† Ming-Kan Li,† Sheng Yang,‡ Tong-Qi Yuan,*,† Guan-Ben Du,§ and Run-Cang Sun*,† †Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, No. Yes, it’s better to use good WBP phenolic glue or E1, E2 glue . Phenolic resin are either water soluble or alcohol soluble. 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