Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide

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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（ナイロン6） そして 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.

機械的特性の比較

プロパティPA6PA66
引張強度70-85 MPa80-100 MPa
曲げ弾性率2.5-3.0 GPa2.8-3.5 GPa
破断伸度30-100%15-60%
Notched Izod Impact50-100 J/m40-80 J/m
融点220°C260°C
HDT at 1.8 MPa70°C90°C

水分吸収

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
  • 金型温度： 40-80°C

Nylon 66 Processing

  • Melting Point: 260°C
  • Processing Range: 280-320°C
  • 金型温度： 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:

グレードPA6 + GF30PA66 + GF30
引張強度140-160 MPa170-200 MPa
HDT (1.8 MPa)205°C+250°C+
水分吸収1.0-1.5%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

よくあるご質問

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?

部品サイズ、材料特性、表面仕上げ、寸法公差、熱暴露、荷重方向、後処理が必要かどうかを確認する。.

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

3Dプリンティングは複雑な形状を素早く作ることができるが、CNC機械加工は精密な表面、より厳しい公差、生産グレードの材料に強いことが多い。.

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

コストは、材料、造形量、印刷時間、レイヤーの高さ、サポート除去、仕上げ、検査、造形物の部品数によって異なる。.

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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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