magasin moncler Substrate using thermal curing pow

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Thermal substrate with UV curable powder coatings

Too fast curing temperature,[link widoczny dla zalogowanych], curing time base instructions from the system does not produce volatiles. Xiao Lei i7 World chopsticks a significant increase in demand = no solvent release,[link widoczny dla zalogowanych], low investment and low energy consumption (due to use of quick-drying equipment and faster due to high productivity brought about by) the UV-curable coatings for applications in all industrial coatings become the fastest-Shan a coating, an annual growth rate of about l0%. 1994i ~ cold UV curing material consumption in Western Europe is about 44.000 tons, most of the varnish. Epoxy acrylate, urethane acrylate, polyester acrylate f is usually active low molecular weight acrylic release agent dilution ene), poly acrylic acid vinegar, unsaturated polyester with styrene or low viscosity c degree of dilution acrylate) and water-based system is widely used UV-curable liquid resin caused by free radical curing initiator. Commonly used free radical initiators are benzophenone and its derivatives, acetophenone derivatives,[link widoczny dla zalogowanych], ketones and acryloyl sigh tons of phosphine oxide. However, UV-curable coating in the liquid during transport diluent monomers and oligomers,[link widoczny dla zalogowanych], the release will stimulate the skin and eyes. Liquid substrate material into the paint inside and not cured long-term emissions in the atmosphere composition is a liquid UV-curable coatings has not been able to solve the problem. Powder Coatings (another successful coating system) as a high melt viscosity,[link widoczny dla zalogowanych], making it difficult to penetrate inside the substrate. Meanwhile, the powder coating raw materials used are solid at room temperature without physiological harm, a construction can be achieved over 100ram thus reducing the powder coating thickness coating times, while saving space and energy consumption. Not long ago: powder coating heat sensitive substrates can not be used because the film forming curing powder coatings at high temperature will cause deformation of the substrate degassing. A new powder coating system has been very close to the success of the development phase, the coating system containing solid and solid-state unsaturated polyester urethane acrylate resin curing agent, can be heat sensitive substrate (such as MDF board and thermoplastics) surface the formation of UV-curable powder coating. The physical properties of materials used are as follows: unsaturated polyester of a glass transition temperature: a melting range of about 52 ℃: 75 ~ 90 ℃ melt viscosity: 200 ℃ time. ~ 96Pas an acid value: - ~ 925mgKOH / g polyurethane acrylic glass transition temperature: a melt viscosity of about 47 ℃: 120 ℃ 40 ~ 60Pas when the range of 65 ~ 85 ℃ melting the powder with the above-mentioned UV curable physical and chemical properties, so we can like ordinary powder (such as polyester or a mixture of three isocyanurate shrink Figure 1 UV-curable powder coating of the construction process: Using infrared light to medium wave infrared radiation: Ultraviolet radiation UV beam : problems: bubbles in the melting process ●, '_, a) Ang surface treatment and materials industry in 1996 to punish a few months / total 第三 eleven

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