Examining The Properties Of PA6 And PA66

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In the automotive, consumer goods, electronics, transportation markets, electrical and other applications, polyamide is regarded as good performance plastics. The electrical resistance and high-temperature properties make it useful for different purposes.

 

It is essential to understand deeper about this wonderful class of plastics. We will explore the key properties of PA6 and PA66 to know their similarities and differences in areas that include mechanical, electrical, thermal, stability, and others.

 

Why are they essential? It is because you need to understand the relevant properties before choosing any thermoplastic for a specific application. Meanwhile, it is essential to contact a reliable and experienced PA6 manufacturer when planning a project.

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Read on as we examine the key properties of these plastics to know what makes a particular polyamide suitable for high-end engineering uses.

 

1. Dimensional Stability

We use some parameters to check the dimensional stability of both of them. The parameters are shrinkage, 24 hours of water absorption, the coefficient of linear thermal expansion.

Properties

Shrinkage (%)

Water Absorption (%)

The Coefficient Of Linear Thermal Expansion ( x 10-5/°C)

PA6

0.5 – 1.5

1.6 – 1.9

5 – 12

PA66

0.7 - 3

1 - 3

5 – 14

 

 

2. Electrical Properties

The electrical resistance of these plastics makes them suitable for a variety of applications. Under the electrical properties, we will compare the two based on the volume resistivity, dielectric constant, arc resistance, and dissipation factor.

Properties

Volume Resistivity

Dielectric Constant

Arc Resistance

Dissipation Factor (x 10-4)

PA6

14 x 1015Ωcm

4 - 5

118 – 125 sec

100 – 600

PA66

14 x 1015Ωcm

4 - 5

130 – 140 sec

100 – 400

 

3. Fire Performance

Fire performance consists of the fire resistance and flammability of the materials. Combustion entails a complex physiochemical phenomenon between material and oxygen with the release of heat. Flammability is defined as the ability to ignite, spread flame, and generate heat.

 

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 PA6 and PA66 have some properties that resist the immediate ignition of material into flame. The detailed properties are as follows:

Properties

Fire Resistance (LOI)

Flammability UL94

PA6

23 – 26 %

HB

PA66

21 – 27 %

HB

 

4. Mechanical Properties

The mechanical properties of any material determine the level at which the material can withstand tension and compression without breaking. A plastic with a higher ability to resist deformation has higher elasticity. The mechanical properties of PA6 and PA66 are outlined as follows:

Properties

PA6

PA66

Young Modulus

0.8 – 2 GPa

1 – 3.5 GPa

Stiffness

0.8 - 2 GPa

0.8 – 3 GPa

Flexibility

0.8 – 2 GPa

0.8 – 3 GPa

Strength at Yield

50 – 90 MPa

45 – 85 MPa

Strength at Break

50 – 95 MPa

50 – 95 MPa

Elongation at Yield

3.4 – 140 %

3.4 – 30 %

Elongation at Break

200 – 300 %

150 – 300 %

 

5. Physical and Optical Properties

A closer examination of these two materials shows significant changes in terms of their physical properties as well as optical properties.

Properties

Density

Glass transition temperature

Gloss

PA6

1.12 – 1.14g/cm3

60°C

130 – 145%

PA66

1.13 – 1.25g/cm3

55 – 58°C

65 – 150%

 

 

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The quality of nylon material you use for any application is crucial. It is always advisable to purchase from a reliable and reputable PA6 manufacturer. With this, you are sure of the ideal material for your applications. Kindly contact us for quality products. Click here to check our products.


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