Typical applications:
Automobiles (dashboards, tool hatches, wheel covers, reflector cases, etc.), refrigerators, high-strength tools (hair dryers, blenders, food processors, lawnmowers, etc.), telephone housings, typewriter keypads, recreational vehicles such as golf carts, and jet skis. Sled carts, etc.
Injection molding process conditions:
Drying treatment: ABS material is hygroscopic and requires drying before processing. Recommended drying conditions for 80 ~ 90 ℃ at least 2 hours. Material temperature should be guaranteed to be less than 0.1%.
Melting temperature: 210 ~ 280 ℃; recommended temperature: 245 ℃.
Mold temperature: 25～70℃. (Mold temperature will affect the finish of the plastic part; lower temperature will result in lower finish).
Injection pressure: 500～1000bar.
Injection speed: medium-high speed.
Chemical and Physical Properties:
ABS is synthesized from three chemical monomers: acrylonitrile, butadiene and styrene. Each monomer has different characteristics: acrylonitrile has high strength, thermal and chemical stability; butadiene has toughness and impact resistance; styrene has easy processing, high finish and high strength. Morphologically, ABS is a non-crystalline material. The polymerization of the three monomers produces a ternary ****polymer with two phases, a continuous phase of styrene-acrylonitrile and a dispersed phase of polybutadiene rubber.The properties of ABS are largely dependent on the ratio of the three monomers and the molecular structure in the two phases. This allows for a great deal of flexibility in product design and has resulted in hundreds of different qualities of ABS materials on the market. These different qualities offer properties ranging from medium to high impact resistance, from low to high finish and high temperature twisting properties, etc. ABS materials offer superior processability, appearance, low creep and excellent dimensional stability as well as high impact strength.
ABS part of the grade introduction :
Name Model Origin Melting Index g/10min Characteristics and Uses
9715A Jihua 16 used in automobiles, home appliances, electronics shell parts, toys, daily necessities and other industries and products.
0215A Jihua 20 Used in automobile, home appliance, electronic product shell parts, toys, daily necessities and other industries and products.
750 Daqing Petrochemical 4.5 has easy mobility, OA equipment, groceries and so on.
301 Lanhua 1.3-2.3 Suitable for common various chassis parts, household appliances, lamps, miscellaneous goods.
510 Liaoning Huajin 2.5 for automobile, home appliance, electronic product shell parts, toys, daily necessities and other industries and products.
757K ZHENJIANG CHIMEI 4.2 TV front case, copier case, telephone case, cosmetic case
707K ZHENJIANG CHIMEI 1.9 Telephone case, lamp holder, toys, office supplies, home appliance buttons.
757 Taiwan Chi Mei 1.8 TV front case, copier case, telephone case, cosmetic case
747 Original White Taiwan Chi Mei 0.8 Helmets, motorcycle gear plate, shoe heels, snow sports goods, etc.
747 Magnetic White Taiwan Chi Mei 1.2 Ultra-high strength, for injection molding.
777D Taiwan Chi Mei 6 super heat resistant.
777B Taiwan Chi Mei 6.5 Super heat resistant.
758 Taiwan Chi Mei good transparency
765B Taiwan Chi Mei 4.2 flame retardant, light resistance, heat resistance.
750 Kumho, South Korea 4.5 Household appliances, automobile parts.
GP-22 BASF 13-23 Household appliances, automotive parts.
121H Korea LG 20 vacuum cleaner, mixer
ASA: is a by acrylonitile (acrylonitile), styrene (styrene), acrylic rubber (acrylate) composed of ternary polymers developed in the 1970s, belongs to the impact modification of san resin.
asa is the United States general electric (general electric) under the general plastics group (ge plastics) a major product, and in August 2002 to geoly registered trademark will be used as *** extrusion raw materials to China pvc color *** extrusion profile market.
asa has the following advantages:
1, asa has good mechanical and physical properties
asa is evolved from abs (abs consists of acrylonitile, butadiene rubber, styrene), which retains the excellent mechanical and physical properties of abs as an engineering plastic. It retains the excellent mechanical and physical properties of abs as an engineering plastic.
2, asa has a strong weather resistance
Polymer materials containing double bonds, the double bond is easy to be the energy intensity of the sun's ultraviolet light in the open, resulting in polymer materials decomposition. And asa is not contain unsaturated double bond acrylic rubber instead of abs contains unsaturated double bond butadiene rubber, therefore, not only can resist the degradation, aging, fading caused by ultraviolet irradiation, and at the same time to the atmosphere of the oxidation process of high temperature caused by asa decomposition or discoloration has a strong protection, which greatly enhances the material's aging resistance and weather resistance performance. According to the test results, asa's anti-aging performance is 10 times more than abs.
3, asa has a better high temperature resistance
4, asa is an anti-static material, can make the surface less dust accumulation
asa application areas
Since the appearance of asa, asa, due to its excellent weathering, and abs similar to the typical mechanical properties, so that it is in a series of applications in the status of the firmly established down:
The automotive field
The automotive field, asa has been the first time in the automotive industry to be established in the field of asa. /p>
Automotive field: asa in a sustained long time after the wind erosion, also will not be as special treatment of aging-resistant abs as gradual gray (due to wind erosion or water flow caused by the surface of the many micro-cracks and cavitation). asa's typical application is the exterior mirrors, radiator grille, tail gear, lampshade, etc. to withstand sun and rain, strong winds blowing and other harsh conditions of the exterior parts. At present, it is even gradually extended to motorcycle panels, camping cars, small boat hulls, surfboards and other fields.
Horticultural field: asa has proved to be particularly suitable for horticultural irrigation equipment and lawn cutter housings.
Electrical and electronic fields: asa is prioritized for use in the housings of durable equipment, such as: sewing machines, telephones, kitchen equipment, satellite dishes and other all-weather housings.
Construction field: asa/pvc blends are used for roofing siding and window materials, which have been practically applied abroad for more than 10 years.
In the United States, due to the asa surface quality and color stability, has been widely used in advanced bathroom and sanitary products, hot and cold water exchangers, etc., which shows that asa also has a cleaner and disinfectant corrosion resistance.
PMMA
Chemical name called polymethyl methacrylate
Drawbacks: PMMA surface hardness is not high, easy to rub hair, low impact resistance, poor molding fluidity
Super transparent PMMA material is mainly used for cell phone protective screen, the product is divided into hardened coatings, there is no hardened coating of two kinds. It is characterized by excellent light transmission, no impurities, electrostatic protection film, surface hardening thick hardness of up to 5-6H or more. At present, especially recommended for hardening treatment of PMMA materials, domestic known as "raw board".
Polycarbonate (PC) Introduction :
Polycarbonate is the main chain of molecules containing -[O-R-O-CO]-linked thermoplastic resins, according to the molecular structure of the ester group can be divided into aliphatic, alicyclic, aliphatic and an aromatic type, which is of practical value is the aromatic polycarbonate.
Polycarbonate, Polycarbonate, abbreviated as PC. PC is an amorphous, odorless, non-toxic, highly transparent colorless or yellowish thermoplastic engineering plastics, with excellent physical and mechanical properties, especially impact resistance, tensile strength, bending strength, compression strength; creep is small, dimensional stability; good heat resistance and low temperature resistance. In a wide range of temperatures with stable mechanical properties, dimensional stability, electrical properties and flame retardant, can be used for a long time at -60 ~ 120 ℃; no significant melting point, in 220-230 ℃ is molten; due to the rigidity of the molecular chain, the resin melt viscosity; small water absorption, small shrinkage, high dimensional accuracy, good dimensional stability, film permeability is small; is a self-extinguishing material; light stable, but not UV resistance, weathering. Not resistant to ultraviolet light, good weather resistance; oil, acid, not resistant to strong alkalis, oxidizing acids and amines, ketones, soluble in chlorinated hydrocarbons and aromatic solvents, long-term hydrolysis and cracking in the water, the disadvantage is that due to poor fatigue strength, prone to stress cracking, poor solvent resistance, poor abrasion resistance.
PC can be injection molding, extrusion, molding, blow molding, thermoforming, printing, bonding, coating and machining, the most important processing method is injection molding. Before molding must be pre-dried, the moisture content should be less than 0.02%, trace moisture processing at high temperatures will make the products produce a whitish color, silver wire and bubbles, PC at room temperature has a considerable forced high elastic deformation capacity. The impact toughness is high, so it can be cold pressed, cold drawn, cold rolled and other cold molding process. Extrusion with PC molecular weight should be greater than 30,000, to use gradual compression screw, L/D ratio 1:18~24, compression ratio 1:2.5, can be used for extrusion blow molding, injection - blowing, injection - pulling - blowing method of molding high-quality, high-transparent bottles.PC alloys a wide range of types of alloys, to improve the PC melt viscosity (processability) and the products are prone to stress cracking and other defects, PC and different polymers to form alloys or **** blends, to Improve material properties. Specifically PC / ABS alloys, PC / ASA alloys, PC / PBT alloys, PC / PET alloys, PC / PET / elastomer **** blend, PC / MBS **** blend, PC / PTFE alloys, PC / PA alloys, etc., Lee has two material performance advantages, and reduce costs, such as PC / ABS alloys, PC mainly contributes to high heat resistance, better toughness and impact strength, high strength, flame retardant, ABS can improve moldability, apparent quality, reduce density.PC's three major applications are the glass assembly industry, the automotive industry and the electronics, electrical appliances industry, followed by industrial machinery parts, CD-ROMs, packaging, computers, and other office equipment, medical and health care, film, recreation, and protective equipment.PC can be used as glass for windows and doors, and PC laminates are widely used in Protective windows in banks, embassies, detention centers and public **** places, used in aircraft cabin covers, lighting equipment, industrial safety stalls and bulletproof glass. PC boards can be used for various signs, such as gasoline pump dials, automobile instrument panels, cargo and open-air commercial signs, point sliding indicators, PC resin used in automobile camera systems, dashboard systems and interior decorative systems, used as headlamp covers, front and rear automobile gear boards with reinforcing ribbing, reflective mirror frames, door frames, operating rod sheathing, flow blocking boards, PC is used as a junction box, sockets, plugs and bushings, spacers, TV conversion devices, telephone line brackets under the communication cables, PC is applied as a junction box, receptacles, plugs and sleeves, gaskets, television conversion PC is used as junction boxes, sockets, plugs and bushings, gaskets, TV converters, connectors for communication cables under telephone line brackets, electric switch boxes, telephone switchboards, switchboard components, relay housings, PC can be used as low load parts for household appliance motors, vacuum cleaners, shampooers, coffee makers, toasters, handles for power tools, various gears, worm gears, bushings, guide gauges, shelves in refrigerators, etc. PC is an ideal material for optical disc storage media. PC bottles (containers) are lightweight, good impact resistance, resistant to certain high temperatures and corrosive solution washing, as recyclable bottles (containers). pc and pc alloy can be used to make computer racks, shells and auxiliary machines, printer parts. Modified PC is resistant to high-energy radiation sterilization, boiling and baking disinfection, can be used for blood specimen collection apparatus, blood oxygenator, surgical instruments, kidney dialyzer, etc. PC can be made into helmets and helmets, protective masks, sunglasses and sports eye protection. PC film is widely used in printing charts, pharmaceutical packaging, membrane commutator.