Particle board coatings

Properties of nanofillers recently developed nano materials are reported to display greater mechanical strength, greater thermal conductivity and improved electrical performance when compared to materials of normal particle sizes. Nano dimensional materials are being studied as fillers in polymer matrices in a variety of formulations for electrically conductive adhesives, thermally conductive adhesives, encapsulants, printed circuit boards, coatings, catalysts, underfills for flip-chip-attached devices and wafer-level connections. ... 

Chem. Descrip. Silicone resin sol n. in xylene, IPA, butyl alcohol Uses Dry-tilm release coating tor molding ot plastics or rubber adherent coating tor conveyors, chutes, and handling equip, used in rubber, plastics, and adhesives mtg. release agent tor electronic circuit board mfg. particle binder... 

Uses Acrylic for clear or pigmented hardboard, tile board, or particle board coatings, for filler, ground coats, and topcoats blending vehicle Features Provides clear coatings to meet Class 1 or Class 2 stds. similar to Hycar 26256 but with inc. hardness blending vehicle to Hycar 26256 where additional block resist, is required Properties Dens. 8.7 Ib/gal vise. 60 cps pH 2.5 50% NV by wt. Hycar 26256 [Noveon]... 

Carboset 525 Carboset 531 Carboset XL-11 Texicryl 13-002 aciylic, paper coatings AcryGen 1971D AcryGen 3045 AcryGen 3760 AcryGen 15120 CN 3101 CN 3104 NeoCryl B-728 acrylic, particle board coatings Hycar 26256... 

There is a hybrid product available which has a veneer back, a layer of PF-coated wood particles, core veneer cross-ply, another layer of wood particles, and a top veneer. This assembly is pressed into a panel, trimmed to size, and sold into the stmctural-use panel market where it competes with plywood and oriented strand board. 

After the wood particles are coated with resia, the particles are uniformly distributed iato a board by an air laid process. The art of the process is ia controlling and getting a uniform distribution of the wood particles by blowiag them out onto a collection chain. After forming the board shape it is moved to hot presses where the wood particles are consoHdated and the resia cured. From the hot presses the boards move to trim saws where the boards are cut square to their fiaal size. Ia some cases, the boards are sanded to final thickness and surface smoothness. 

Uses. Manufacture of formaldehyde resins, which are used as adhesives in particle board, plywood, and insulating materials countertops and wall paneling coating to fabrics to impart permanent press characteristics manufacture of rubber, photographic film, leather, cosmetics, embalming fluids, insulation disinfectants and fumigants... 

UV curable coatings are applied to a variety of flat, rigid substrates, such as particle board, medium- and high-density fiberboard, wood veneers, polycarbonate, poly(methylmethacrylate), paper, and metal sheets and foils. An example of a formulation for UV curable coatings is in Table 7.1. 

It is mainly used in the industrial production of rigid polyurethane foams. Many other uses are in the fields of coatings, adhesives, sealants and elastomers such as paints, adhesives, weather-resistant sealing materials and foohvear. There is use also in the production of particle board (bonding of wood) and mould cores for the foundry industry (European Union, 1999). 

Due to their low dehydration temperatures and water solubilities, boric acid and sodium borates (borax pentahydrate and borax decahydrate) are mostly used as fire retardants in wood/cellulosic products such as timbers, plywood, particle board, wood fiber, paper products, and cotton products. In recent years, boric acid has also been used as fire retardant in epoxy intumescent coating, pheno-lics, urethane foam, and so on. When necessary, boric acid can be coated with silicone oil such as silicone to alleviate its water solubility in water-based coating. 

Major uses for UV curing (room temperature) include use of flat stock-fillers in particle boards and hardwood flooring, and for high-gloss (no-wax) protective coatings for floor tiles, wood finishes, and other specialty uses. 

Protection of exterior reconstituted panel products (in particular particle board) by surface coatings, treatments and overlays, and subsequent weathering performance, has received considerable attention (J, JJ, 74, J33, 153-155, 157-159), Painted and overlaid boards are much more durable than unfinished boards. Addition of wax as a water repellent benefits performance of the boards, but does not protect against water vapor (J, 11, 74). 

A pigmented Uvlmer 530 formulation coated on particle board was successfully cured In an electron beam accelerator using one-half the normal nitrogen flow. In the complete absence of nitrogen blanketing, partial curing was obtained. The formulation used was as follows ... 

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