What Is Polyphtalamide And Its Processing
Date:2022-6-06 Author:hcscrew
Introduce Polyphtalamide (PPA)
Polyphtalamide is an aromatic semi-crystalline polyamide (nylon) comprised of a diacid and a diamine. They are polyamides containing aromatic rings in their backbones, which gives them high mechanical strength and thermal resistance.
Polyphthalamides have many advantages over traditional polyamide nylons like improved chemical resistance, higher thermal capabilities, low moisture absorbance, stiffness and creep resistant.
PPA processing temperature
Density 1.11-1.2g/cm3
Drying is recommended for 4 hours at 110 ℃. Injection Moulding process temperature of 320-345 ℃ and mould temperature of 80-120°C is recommended.
Strengths
Aside from its excellent performance in a diverse range of conditions, PPA has excellent stiffness and strength, low friction, dimensional stability. It also improved solvent and hydrolysis resistance when compared with PA 66, good creep and chemical resistance, good electrical properties, good fatigue resistance. It is used as a substitute for metals in chemical, automotive, and high temperature applications.
Limitations
PPA requires high processing temperatures (up to 350 ℃). Requires good drying equipment, not inherently flame retardant, attacked by powerful oxidants, mineral acids, acetic acid and formic acid
Applications
Housing for high temperature electrical connectors, used in cutlery, automotive under the hood parts like engine cover, heater valve, fuel line connectors and coolant pumps, fuse, bushings and bearing pads in aircraft engines, medical catheters tubing, surgical trays, water heater manifolds, thermostat housing, air coolers, electronic LEDs, cable wire protection, connectors, halogen light housing, insulation foam, gas separation and water filtration membranes, gas pipes, sports equipment, mfg. of electronic components via soldering process without lead, in appliance for microwave, coffee machine, toaster.
In conclusion, understanding the melting point of PA Nylon plastic can help us to design and optimize the PA extruder screw barrel structure, as well as help extruder users reasonably choose a quality barrel screw.
Quote or contact us at HUACHEN Screw Barrel to speak to our expert team about the melting points of PA Nylon plastics processed by extruder screws.
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