As the leader among five major engineering plastics, Nylon (PA) is widely applied in automotive components, electrical & electronic parts, industrial gears and daily consumer goods. Many engineers only focus on selecting PA6, PA66 or PA12 during material specification, while ignoring a critical fact: neat nylon resin has performance limitations. It is often those “invisible” functional additives that determine the final service life and safety of finished articles.

Up to 19 kinds of nylon are commonly used in industry for different scenarios: • General grades: PA6 features low cost and good toughness; PA66 delivers high strength and superior heat resistance as basic options. • Low water absorption grades: PA11, PA12, PA610, PA612 offer excellent dimensional stability, ideal for precision parts and humid environments. • High temperature resistant grades: PA46, PA4T/6T/9T can work continuously under high temperature, preferred for engine peripheral parts and SMT processes. • Reinforced grades: Glass fiber / carbon fiber reinforced nylon achieves greatly improved strength, serving as core materials for lightweight structural components. • Functional grades: Flame retardant nylon, antistatic nylon, super-toughened nylon, transparent nylon, food-contact nylon to satisfy various segmented requirements.

Many manufacturers encounter such troubles: even with identical nylon resin, products become brittle and yellow after outdoor exposure; discoloration and decomposition occur during processing; products fail flame retardant tests; electronic components are damaged by electrostatic discharge.

The root lies in additive formulation.

Nylon has limited inherent weather resistance. UV radiation in outdoor conditions triggers photodegradation, resulting in yellowing, loss of mechanical properties and surface cracking. UV absorbers effectively absorb harmful ultraviolet rays and work synergistically with light stabilizers to greatly improve weatherability and extend outdoor service life. They are widely adopted in automotive exterior parts, outdoor cables, photovoltaic components and other weather-resistant applications.

To meet the weathering demand of polyamides, we recommend SEED as the core multifunctional stabilizer. Chemical name of Light Stabilizer SEED: N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)isophthalamide (CAS: 42774-15-2). It is an aromatic amide-piperidine stabilizer specially developed for polyamides, functioning as both light stabilizer and antioxidant. Its melting point is around 270℃, perfectly matching nylon processing temperature with excellent dispersion in resin. The molecular structure of SEED can form hydrogen bonds with nylon molecular chains, bringing outstanding compatibility with polyamide substrates. It resists blooming and extraction to provide long-lasting protection. The recommended dosage ranges from 0.1% to 0.5%. In practical application, it stabilizes melt pressure and melt flow index during processing, reduces filament breakage rate in fiber spinning, enhances color fastness, and inhibits yellowing and mechanical attenuation induced by UV exposure. SEED delivers excellent weathering and thermal oxidative stabilization for nylon injection moldings, films and fibers.

Nylon is processed at elevated temperatures and prone to thermal oxidative degradation, leading to discoloration and performance loss of finished goods. For both conventional processing of PA6/PA66 and harsh production conditions of high-temperature nylon, antioxidant systems offer thermal protection during processing and mitigate long-term thermal aging, helping manufacturers stabilize product quality.

For nylon antioxidant selection, Antioxidant 1098 is the classic first choice for polyamides. Chemical name of Antioxidant 1098: N,N'-hexamethylenebis(3,5-di-tert-butyl-4-hydroxyhydrocinnamamide) (CAS: 23128-74-7). It is a hindered phenolic primary antioxidant, appearing as white crystalline powder, melting point 156–161℃, molecular weight 637. The amide groups in its molecular structure bring outstanding affinity with nylon, contributing to superior compatibility and extraction resistance without blooming or contamination. Antioxidant 1098 possesses remarkable thermal stability with 1% weight loss temperature around 280℃. It has extremely low volatility under nylon processing temperature of 250–280℃. It efficiently scavenges peroxy radicals generated during high-temperature extrusion and injection molding, restraining degradation and yellowing and retaining original whiteness and mechanical properties. The recommended dosage is 0.1%–0.5%. Remarkable synergistic effect can be achieved when compounded with phosphite secondary antioxidants such as 168 and 626, building a complete protection system for processing stability and long-term thermal aging resistance. It is widely used in PA6, PA66, glass fiber reinforced nylon, polyamide fibers and films.

To satisfy special processing requirements of glass fiber reinforced nylon and high-temperature polyamides, we supply mature alternative solution for BRUGGOLEN H10. Comparing with traditional organic phosphites, this equivalent substitute for BRUGGOLEN H10 features superior high-temperature resistance, high shear resistance, non-volatility and hydrolysis resistance, remaining stable under extreme processing temperature. The recommended addition level is 0.1%–0.3%. It is especially suitable for harsh processing conditions of glass fiber reinforced nylon and high-temperature nylon (PA46, PA6T, PA9T etc.). It effectively prevents resin degradation and yellowing under high temperature and high shear. Combined with phenolic antioxidants, it greatly prolongs service life under thermal oxidative environment. It can also act as end-group stabilizer during nylon polymerization. Twin-screw extrusion blending is suggested for optimal dispersion. It provides balanced performance with higher cost-effectiveness.

Driven by rising flame retardant standards in new energy vehicles, charging piles and electrical & electronic industries, demand for flame retardant nylon keeps growing. Our flame retardant series helps nylon materials reach required flame rating, compatible with various polyamide substrates while maintaining mechanical performance. Eco-compliant grades are available for connectors, charging pile components, high & low voltage electrical appliances and other fields.

Static risks cannot be ignored, covering antistatic requirements of carbon fiber reinforced nylon, ESD protection of conductive polyamides, as well as special demands of electronic trays, semiconductor tools and explosion-proof equipment. Our antistatic products eliminate static accumulation of nylon for various applications requiring electrostatic protection.

There is no inferior nylon, only inappropriate formulation. From PA6 to high-temperature nylon, from general injection molding to special modification, we are deeply engaged in polymer additives. We professionally supply full series of UV absorbers, light stabilizers, antioxidants, antistatic agents and flame retardants, including star products such as SEED multifunctional stabilizer, Antioxidant 1098 and equivalent substitute for BRUGGOLEN H10 high-temperature nylon additive. We can provide professional additive selection suggestions and customized solutions according to your specific substrate, processing technology and performance targets to upgrade the quality of nylon products.