Material selection of plastic hangers:
Plastic hanger is mainly used in ABS plastic molding. ABS chemical name for acrylonitrile - butadiene - styrene copolymer, ABS resin is the largest output, the most widely used polymers, it PS, SAN, BS various properties of organic unity, both tough and hard, just balanced with excellent mechanical properties. ABS is acrylonitrile, butadiene and styrene terpolymer, A representative of acrylonitrile, B for butadiene, S for styrene.
Plastic hanger general performance:
ABS appearance was as opaque ivory pellets, and its products can be as colorful, and has a high gloss. ABS relative density of about 1.05, low water absorption. ABS combined with other materials, easy-to-surface printing, coating and plating treatment. ABS oxygen index of 18 to 20, is a flammable polymer, flame yellow, smoky, and issued a special cinnamon. Mechanical properties of plastic hangers: ABS has excellent mechanical properties, excellent impact strength, can be used at very low temperatures; ABS excellent wear resistance, dimensional stability, oil resistance, can be used for moderate load and speed bearing under. ABS creep resistance than PSF and PC large, but smaller than the PA and POM. ABS flexural strength and compressive strength is less plastic in. Greater influence on the mechanical properties of ABS temperatures.
Plastic hangers thermal properties:
ABS heat distortion temperature of 93 ~ 118 ℃, the products after annealing treatment can also be increased by about 10 ℃. ABS at -40 ℃ still showed some toughness, can be used in the temperature range of -40 ~ 100 ℃.
Hanger electrical properties:
ABS electrical insulation is better, and almost independent of temperature, humidity and frequency, can be used in most environments. Plastic hanger environmental performance: ABS from water, inorganic salts, alkalis and a variety of acids influence, but soluble in ketones, aldehydes, and chlorinated hydrocarbons by glacial acetic acid, vegetable oil will produce stress corrosion cracking. ABS poor weather, in the role of UV prone to degradation; outdoor six months, the impact strength decreased by half.
ABS plastic processing performance:
ABS is an excellent processability of thermoplastics, common processing methods available processing. ABS melt flow than PVC and PC good, but worse than PE, PA and PS, similar to the POM and HIPS; ABS flow characteristics of a non-Newtonian fluid; the melt viscosity and the processing temperature and shear rate have a relationship , but more sensitive to shear rate. ABS, good thermal stability, less prone to degradation phenomena. ABS high water absorption, should be dried before processing. General products, dry conditions for the temperature 80 ~ 85 ℃, time 2 ~ 4h; products on special requirements (such as electroplating), dry conditions for the temperature 70 ~ 80 ℃, time 18 ~ 18h. ABS products easy to produce in the processing of internal stress, the size of the internal stress can be immersed in glacial acetic acid test; if too much stress and stress cracking products for the absolute prohibition, should be annealed, the specific conditions placed on the hot cycle of 70 ~ 80 ℃ inside the oven 2 ~ 4h, then cooled to room temperature.
Plastic hanger can be seen from the analysis of the performance of ABS plastic, which is a good overall performance engineering materials, not only with the combination of other materials, easy-to-surface printing, coating and plating treatment, and impact strength, and resistance to wear resistance, high dimensional stability, and insulation is better, can be used in most cases. But it also has some shortcomings, such as poor weather plastic hangers, if placed outdoors will make it a long-term impact strength decreased, that is, people often say change "brittle", easy breakage. And the color of the surface coating will fade defeat. But the advantage is more obvious shortcomings, and suitable for mass production. Thus, manufacturers often use this material to processing racks.