Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide

nylon 6 plastic pellets granules industrial packaging
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide

Chemical Structure Differences

The fundamental difference between PA6 (нейлон 6) и PA66 (Nylon 66) lies in their molecular structure:

  • Nylon 6: Made from caprolactam, has 6 carbon atoms in each repeating unit. Less crystalline structure.
  • Nylon 66: Made from hexamethylenediamine and adipic acid, has two 6-carbon chains. More crystalline structure.

Mechanical Properties Comparison

НедвижимостьPA6PA66
Прочность на разрыв70-85 MPa80-100 MPa
Модуль упругости2.5-3.0 GPa2.8-3.5 GPa
Удлинение при разрыве30-100%15-60%
Notched Izod Impact50-100 J/m40-80 J/m
Температура плавления220°C260°C
HDT at 1.8 MPa70°C90°C

Поглощение влаги

Moisture absorption is critical for nylon applications:

ConditionPA6PA66
At 50% RH2.5-3.0%2.0-2.5%
Saturation8-10%6-8%

Processing Characteristics

Nylon 6 Processing

  • Melting Point: 220°C
  • Processing Range: 240-280°C
  • Температура формы: 40-80°C

Nylon 66 Processing

  • Melting Point: 260°C
  • Processing Range: 280-320°C
  • Температура формы: 60-90°C

Applications by Material

Nylon 6 Applications

  • Gears and sprockets
  • Industrial monofilament
  • Film and packaging
  • Consumer products

Nylon 66 Applications

  • Automotive under-hood components
  • Electrical connectors
  • High-temperature bearings
  • Precision mechanical components

Reinforced Grades

Both materials are commonly reinforced with glass fiber:

КлассPA6 + GF30PA66 + GF30
Прочность на разрыв140-160 MPa170-200 MPa
HDT (1.8 MPa)205°C+250°C+
Поглощение влаги1.0-1.5%0.8-1.2%

Selection Summary

Choose Nylon 6 when:

  • Impact resistance is critical
  • Cost sensitivity is high
  • Operating temperatures are moderate

Choose Nylon 66 when:

  • Higher mechanical strength is required
  • Elevated temperatures are expected
  • Dimensional stability is critical

ЧАСТО ЗАДАВАЕМЫЕ ВОПРОСЫ

When is Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide a good option?

Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide is a good option when fast iteration, complex geometry, low tooling cost, or low-volume production is more important than molded-part unit cost.

What should be checked before choosing Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide?

Проверьте размер детали, свойства материала, качество обработки поверхности, допуск на размеры, тепловое воздействие, направление нагрузки и необходимость последующей обработки.

How does Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide compare with CNC machining?

3D-печать позволяет быстро создавать сложные формы, в то время как обработка на станках с ЧПУ часто более эффективна для получения точных поверхностей, более жестких допусков и материалов производственного класса.

What affects the cost of Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide?

Стоимость зависит от материала, объема сборки, времени печати, высоты слоя, удаления поддержки, финишной обработки, контроля и количества деталей в сборке.

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Nylon 6 vs Nylon 66 — Frequently Asked Questions

Is Nylon 66 stronger than Nylon 6?

Yes. Nylon 66 typically offers 15-25% higher tensile strength (80-100 MPa vs 70-85 MPa) due to more crystalline structure.

Which nylon is better for gears?

Both work well. PA6 is preferred for impact-loaded gears due to higher toughness. PA66 is better for high-load, high-temperature applications.

Where can I source quality PA6 and PA66 granules?

Nylonplastic supplies both grades in natural, colored, and reinforced versions. Contact us for samples.

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