Several commonly used plastic vacuum coating materials
Vacuum coating technology is a multidisciplinary comprehensive product, the process is bound to involve many aspects of technical knowledge, the production of technical problems is not a simple coating technology can be solved, need to enter a multidisciplinary comprehensive analysis. First of all, the quality of plastic substrate to meet the requirements of vacuum coating, substrate molding processing is not at that time, prone to a variety of defects, directly or indirectly affect the quality of vacuum coating. Let's take a look at the following plastic vacuum coating often encountered problems of the solution, I hope you useful !
For plastic materials used in the vacuum coating machine, need high combining with the membrane layer, put a little pot, heat stability, at the same time satisfy the three conditions of plastic material is very few, but the plastic material application in industrial production is very extensive, so the application of plastic vacuum coating machine is developed, in order to make more plastic in the vacuum coating, often through various methods to improve.
Now introduce several kinds of commonly used in vacuum coating plastic, ABS is the first to use, is the plastic at the same time satisfy the three conditions, A representative of acrylonitrile, B on behalf of butadiene, styrene S representative, plastic containing more than three kinds of material is ABS plastic, ABS plating membrane layer, can very good play its mechanical properties, impact resistance, relying on its high hardness, wear resistance, the cost is not high, are often used to replace some metal machinery parts and components, also used in the production of household appliances shell, but because of containing butadiene, ABS cannot be used in outdoor, otherwise you will become angry.
PETP polyethylene terephthalate vinegar, or pet for short, is another kind of plastic that meets three conditions after ABS. The coated film has good tensile strength and high toughness. PS polystyrene can withstand the temperature under 100 ℃, the adaptability of vacuum coating, colorless, tasteless, acid and alkali, is a very good insulation materials, but because of the easy embrittlement, so use is not widespread. PC polycarbonate can also be vacuum coating, mechanical properties and impact resistance, but the price is relatively high, and in the molding if the control is not good, easy to produce cracking. PA polyamide vacuum coating can be oil and moisture proof, shading and heat insulation performance is also very good, can be used as the production of high-grade packaging products.
Polyethylene due to vacuum coating to adapt to the poor, but still can be used in vacuum coating by modified, but can only produce low-grade packaging products or thermal insulation products, more stable than polyethylene polypropylene is heated, and very light, so its use value is higher, but the combination of polypropylene and film sex more bad, so must carry on the coating surface treatment before, as a decorative as membrane layer, make the products more beautiful.
Polyvinyl chloride (PVC) is a kind of not easy corrosion material, but the heat is not stable, it can withstand temperature 60 ℃ below, in order to improve its heat resistance will add stabilizer, vacuum coating machine also should choose low temperature coating equipment.
Vacuum coating machine is applied in all walks of life, and the wide use of plastic, the continuous development of vacuum coating technology is bound to extend tentacles to the plastic industry, in the face of some commonly used but not directly vacuum coating of plastic, researchers use scientific knowledge to solve problems, because the difficulties are not hindered by the development of science and technology.
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