PPA (Polyphthalamide) is polyphthalamide.PPA is a kind of thermoplastic functional nylon with both semi-crystalline structure and non-crystalline structure. It is prepared by polycondensation of phthalic acid and phthalenediamine. It has excellent thermal, electrical, physical and chemical resistance and other comprehensive properties.

PPA Engineering Plastic (High Temperature Nylon) | Xiamen LFT body{ font-family: Arial, Helvetica, sans-serif; line-height:1.8; color:#111; max-width:1100px; margin:0 auto; padding:20px; } h1,h2,h3{color:#1f6f3f; margin-top:28px;} h1{font-size:28px;} h2{font-size:24px;} h3{font-size:20px;} p{font-size:16px; margin:10px 0;} ul{margin:10px 0 10px 20px;} .box{ background:#f5f7f5; border-left:4px solid #1f6f3f; padding:15px; margin:15px 0; } .img{ width:100%; max-width:700px; height:auto; display:block; margin:15px 0; } .highlight{color:#1f6f3f; font-weight:bold;} PPA (Polyphthalamide) Engineering Plastic PPA (Modified Polyphthalamide) is a high-performance semi-aromatic nylon with excellent heat resistance, mechanical strength, and chemical stability, widely used in demanding engineering applications. Material Overview PPA offers a heat deformation temperature above 300°C and continuous service temperature up to 170°C, making it suitable for high-temperature environments. It maintains excellent strength, stiffness, fatigue resistance, and creep resistance under high temperature and humidity conditions. Key Characteristics Excellent heat resistance (HDT > 300°C) High mechanical strength and stiffness Outstanding fatigue and creep resistance Good chemical resistance and crack resistance Stable performance under high humidity Excellent surface quality and appearance Short injection molding cycle time Performance Advantages Mechanical Performance High strength, hardness, and toughness allow PPA to replace metal in many applications. Thermal Stability Compared with PA46, PPA offers higher thermal stability and better long-term performance at elevated temperatures. Electrical & Arc Resistance Excellent CTI (comparative tracking index) and arc resistance make it suitable for electronic components. Chemical Resistance Strong resistance to oils, fuels, glycols, and many industrial chemicals. Processing Advantages Good flowability and short cycle time improve production efficiency in injection molding. Application Fields Automotive Industry Used in fuel systems, transmission systems, and engine components to reduce weight and extend service life. Electronics & Electrical Applied in connectors, sensors, switches, chip sockets, and high-density PCB components. Industrial Components Suitable for bearings, seals, compressor parts, and wear-resistant mechanical components. High-End Applications Used in coating, plating, and flame-retardant applications requiring high surface quality. Processing Guidelines Drying: Moisture content must be controlled below 0.1% before processing to avoid molecular degradation. Injection Temperature: 615–650°F (approx. 324–343°C) Mold Temperature: ≥275°F for optimal crystallization and dimensional stability Cycle Time: Short residence time (<10 minutes in barrel recommended) Product Features Available for injection molding applications Compatible with high-performance reinforced grades Supports surface finishing and plating grades Custom color and formulation available Supplier Information Xiamen LFT Composite Plastic Co., Ltd. Specialized in long fiber reinforced thermoplastics (LFT) including LGF and LCF modified engineering plastics. ISO9001 & IATF16949 certified Customized formulations available Strong R&D and in-house testing lab Global supply capability Professional technical support for injection molding

Known for its dimensional stability, low moisture absorption, high strength, stiffness, and chemical, UV, and thermal resistance.

What is PA66? PA66 (Polyamide 66), also known as Nylon 66, is a semi-crystalline thermoplastic widely used in automotive, electrical, electronic, and industrial applications. It offers excellent mechanical strength, wear resistance, and thermal stability. What is PA66-LGF? PA66-LGF (Long Glass Fiber Reinforced Nylon 66) is a modified engineering plastic made by reinforcing PA66 with long glass fibers. This significantly improves mechanical performance, dimensional stability, and heat resistance. Compared with unfilled PA66, LGF-reinforced PA66 offers: Higher strength and stiffness Improved dimensional stability (low warpage and shrinkage) Better fatigue and creep resistance Reduced water absorption impact on properties Material Characteristics High mechanical strength and rigidity Excellent heat resistance and wear resistance Good chemical resistance (oils, fuels, greases) Low friction and self-lubricating properties Stable performance under humid and variable environments Applications 1. Automotive Industry Used in engine covers, intake systems, cooling components, interior and structural parts such as dashboards, door handles, and brackets. 2. Electrical & Electronics Applied in connectors, switches, insulation parts, housings, and electrical components requiring flame resistance and dimensional stability. 3. Industrial & Machinery Suitable for gears, bearings, fasteners, conveyor parts, and structural mechanical components requiring high strength and durability. Product Specification ItemSpecification GradePA66-LGF30 Fiber Length12 mm ColorNatural / Customized MOQ25 kg Packaging25 kg/bag Delivery Time7–15 days PortXiamen Port FAQ 1. Is higher glass fiber content always better? Not necessarily. The optimal fiber content depends on application requirements such as strength, toughness, and surface quality. 2. Can LGF materials be used for appearance parts? Yes, but surface quality must be evaluated based on product design and mold conditions. 3. How to choose reinforcement length? Selection depends on required mechanical performance and final application conditions. Supplier Information Xiamen LFT Composite Plastic Co., Ltd specializes in long fiber reinforced thermoplastics (LFT-G / LFT-D), including PP, PA6, PA66, PPA, PBT, TPU, and other engineering materials. We provide customized solutions for automotive, electronics, and industrial applications.