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A member of plastic family |
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Release time:2013-02-28 Source:admin Reads: | |
As is known to all, there are five members in plastic family. ABS is one of them which is derived from acrylonitrile, butadiene, and styrene, it is also can be made into seal tags. Acrylonitrile is a synthetic monomer produced from propylene and ammonia; butadiene is a petroleum hydrocarbon obtained from the C4 fraction of steam cracking; styrene monomer is made by dehydrogenation of ethyl benzene— a hydrocarbon obtained in the reaction of ethylene and benzene. Impact resistance does not fall off rapidly at lower temperatures. Stability under load is excellent with limited loads. Thus, changing the proportions of its components ABS can be prepared in different grades. Two major categories could be ABS for extrusion and ABS for injection molding, then high and medium impact resistance. Generally ABS would have useful characteristics within a temperature range.The final properties will be influenced to some extent by the conditions under which the material is processed to the final product. For example, molding at a high temperature improves the gloss and heat resistance of the seal tags whereas the highest impact resistance and strength are obtained by molding at low temperature. Pigments can also be added, as the raw material original color is translucent ivory to white. Other factors include exposure to ultraviolet radiation, for which additives are also available to protect against. Even though ABS plastics are used largely for mechanical purposes, they also have electrical properties that are fairly constant over a wide range of frequencies. These properties are little affected by temperature and atmospheric humidity in the acceptable operating range of temperatures. While the cost of producing seal tags is roughly twice the cost of producing polystyrene, it is considered superior for its hardness, gloss, toughness, and electrical insulation properties. ABS is flammable when it is exposed to high temperatures, such as a wood fire. It will melt then boil, at which point the vapors burst into intense, hot flames. |