A brief overview of the performance difference between PA6 and PA66 and its properties

Pa6, also known as nylon 6, is a translucent or opaque milky white particle with thermoplastic, lightweight, toughness, chemical resistance and durability. It is generally used in automotive parts, mechanical parts, electronic and electrical products, engineering parts, etc. product.

The chemical and physical properties of Pa6 are similar to those of Pa66. However, it has a low melting point and a wide process temperature range. Its impact resistance and solubility resistance are better than Pa66, but it is also more hygroscopic. Because many of the quality characteristics of plastic parts are affected by hygroscopicity, this should be taken into account when designing products using Pa6. In order to improve the mechanical properties of Pa6, various modifiers are often added. Glass fiber is the most common additive, and sometimes synthetic rubbers such as EPDM and SBR are added to improve impact resistance. For products without additives, Pa6 shrinks between 1% and 1.5%. The addition of a glass fiber additive can reduce the shrinkage to 0.3%. The shrinkage of the molded assembly is mainly affected by the crystallinity and hygroscopicity of the material. The actual shrinkage is also a function of the plastic part design, wall thickness and other process parameters.

Pa6

Pa6 absorbs moisture easily, so it is important to pay attention to the drying before processing. If the material is supplied in a waterproof material, the container should be kept closed. If the humidity is greater than 0.2%, it is recommended to dry in hot air above 80 °C for 16 hours. If the material has been exposed to air for more than 8 hours, it is recommended to dry at 105 ° C for more than 8 hours.

Pa6 has good comprehensive performance, low density, easy molding, large design freedom, thermal insulation, and obvious advantages in mold and assembly costs.

The difference between Pa6 and Pa66

Pa6 product performance:

Melting point: 210 - 220 °C Decomposition temperature: >300 °C Flash point: >400 °C Auto-ignition temperature: >450 °C Physical solid odor: Non-toxic: No recycling: Final treatment: Soil (harmless industrial waste) Agent: It can be transported with various fire extinguishing agents (water, foam, powder, CO2, sand): Non-dangerous goods, applicable to various transport vehicles. European Community Standard: Non-dangerous goods

Pa66 product performance:

Melting point: 250-270°C Decomposition temperature: >350 °C Flash point: >400 °C Auto-ignition temperature: >450°C Physical state: Solid particle odor: Non-toxic: No recycling: Can be finally treated: Soil (harmless industrial waste) Extinguishing media: It can be transported with various fire extinguishing agents (water, foam, powder, CO2, sand): Non-dangerous goods, applicable to various transport vehicles. European Community Standard: The chemical and physical properties of non-dangerous goods Pa6 are very similar to those of Pa66, however, It has a low melting point and a wide process temperature range. It has better impact resistance and solubility than Pa66, but it is also more hygroscopic. Because many of the quality characteristics of plastic parts are affected by hygroscopicity, this should be taken into account when designing products using Pa6. In order to improve the mechanical properties of Pa6, various modifiers are often added. Glass is the most common additive, and sometimes synthetic rubbers such as EPDM and SBR are added to improve impact resistance. For products without additives, the shrinkage of Pa6 is between 1% and 1.5%. The addition of a glass fiber additive reduces the shrinkage to 0.3% (but slightly higher in the direction perpendicular to the flow). The shrinkage of the molded assembly is mainly affected by the crystallinity and hygroscopicity of the material.

Pa66 has a higher melting point in polyamide materials. It is a semi-crystalline-crystalline material. Pa66 also maintains high strength and stiffness at higher temperatures. Pa66 is still hygroscopic after molding, the extent of which depends primarily on the composition of the material, the wall thickness and the environmental conditions. When designing a product, it is important to consider the effect of hygroscopicity on geometric stability.

In order to improve the mechanical properties of Pa66, various modifiers are often added. Glass is the most common additive, and sometimes synthetic rubbers such as EPDM and SBR are added to improve impact resistance.

Pa66 is less viscous and therefore very fluid (but not as good as Pa6). This property can be used to machine very thin components. Its viscosity is sensitive to temperature changes. The shrinkage of Pa66 is between 1% and 2%. The addition of glass fiber additives can reduce the shrinkage to 0.2%~1%. The shrinkage ratio is large in the flow direction and in the direction perpendicular to the flow direction.

Pa66 is resistant to many solvents but weak to acids and other chlorinating agents.

Application of Pa6 in daily necessities

In order to meet the requirements for use in industrial products, reinforced polyamide materials should meet the following requirements: 1. Strength and durability, excellent combination of rigidity and heat resistance.

2, optimized component design, excellent coloring performance, perfect surface appearance, can be applied to complex structural molding, and help design developers to develop new modeling products.

3, good processability, excellent fluidity and thermal stability make the material processing conditions more relaxed, so that the injection molded parts are miniaturized.

4, very high thermal stability, can not hang tin in the wave solder of up to 270 degrees.

5. Constant electrical performance over a wide range of temperatures and frequencies to ensure 100% safe use of equipment.

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